/* ============================================
   豆可 AI 英语 · 门户网站
   Apple 极简科技风
   ============================================ */

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scrollbar-width: none; -ms-overflow-style: none; overflow-x: hidden; }
html::-webkit-scrollbar { display: none; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern", "liga", "calt";
  overflow-x: hidden;
  position: relative;
}

/* ===== Aurora 极光背景层（动态彩色光斑） ===== */
.aurora-bg {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden;
}
.aurora-bg::before,
.aurora-bg::after,
.aurora-bg .blob {
  content: ""; position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.45;
  mix-blend-mode: multiply;
  will-change: transform;
}
.aurora-bg::before {
  width: 520px; height: 520px; top: -120px; left: -120px;
  background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
  animation: auroraDrift1 28s ease-in-out infinite;
}
.aurora-bg::after {
  width: 600px; height: 600px; top: 30%; right: -180px;
  background: radial-gradient(circle, var(--brand) 0%, transparent 70%);
  animation: auroraDrift2 36s ease-in-out infinite;
}
.aurora-bg .blob-1 { width: 480px; height: 480px; top: 60%; left: -100px; background: radial-gradient(circle, var(--accent-3) 0%, transparent 70%); animation: auroraDrift3 42s ease-in-out infinite; }
.aurora-bg .blob-2 { width: 560px; height: 560px; top: 80%; right: -160px; background: radial-gradient(circle, var(--accent-4) 0%, transparent 70%); animation: auroraDrift4 32s ease-in-out infinite; }
.aurora-bg .blob-3 { width: 400px; height: 400px; top: 40%; left: 35%; background: radial-gradient(circle, var(--accent-1) 0%, transparent 70%); animation: auroraDrift5 50s ease-in-out infinite; opacity: 0.35; }

@keyframes auroraDrift1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(120px, 80px) scale(1.1); }
}
@keyframes auroraDrift2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-100px, 100px) scale(0.9); }
}
@keyframes auroraDrift3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(80px, -100px) scale(1.15); }
}
@keyframes auroraDrift4 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-120px, -60px) scale(0.95); }
}
@keyframes auroraDrift5 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 60px) scale(1.1); }
}
@media (prefers-reduced-motion: reduce) {
  .aurora-bg::before, .aurora-bg::after, .aurora-bg .blob { animation: none; }
}
/* 手机端禁用 aurora 动画（GPU 性能瓶颈） */
@media (max-width: 768px) {
  .aurora-bg::before, .aurora-bg::after, .aurora-bg .blob { animation: none; }
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* Variables — Coastal Aurora × Dusk Amber
   主体：B 海岸极光（冷白 + 鲜蓝 + 薄荷青 + 珊瑚橙 + 紫）
   点缀：C 暮色琥珀（暖米 + 玫红 + 暖黄）*/
:root {
  /* 底色系 — 暖米暮色（C 暮色琥珀为主） */
  --bg: #F5F1E8;          /* 暖米主背景（暮色琥珀） */
  --bg-warm: #F5F5F7;     /* 暖米亮调（已改为页面底色，避免大面积米色） */
  --bg-elev: #FFFFFF;     /* 卡片 */
  --bg-sub: #FBF8F1;      /* 次级背景 */
  --bg-deep: #0F172A;     /* 深夜蓝（深色块） */

  /* 文字系 — 高对比 */
  --text: #0F172A;        /* 主文字（深海蓝/接近黑） */
  --text-2: #334155;      /* 次文字（清晰灰） */
  --text-3: #64748B;      /* 弱化文字 */
  --text-on-dark: #F0F4FA;/* 深底上的文字 */

  /* 线条系 */
  --line: rgba(10, 37, 64, 0.08);
  --line-strong: rgba(10, 37, 64, 0.14);
  --line-on-dark: rgba(255, 255, 255, 0.12);

  /* 品牌主色 — 鲜蓝（B） */
  --brand: #0066FF;
  --brand-deep: #0052CC;
  --brand-soft: rgba(0, 102, 255, 0.08);

  /* 强调色 1 — 薄荷青（B 数据/AI） */
  --accent-1: #00C7B7;
  --accent-1-soft: rgba(0, 199, 183, 0.1);

  /* 强调色 2 — 珊瑚橙（B 警示/重要） */
  --accent-2: #FF6B5B;
  --accent-2-soft: rgba(255, 107, 91, 0.1);

  /* 强调色 3 — 紫（B 创新） */
  --accent-3: #7C5CFC;
  --accent-3-soft: rgba(124, 92, 252, 0.1);

  /* 强调色 4 — 暖黄（C 点缀） */
  --accent-4: #FFB84D;
  --accent-4-soft: rgba(255, 184, 77, 0.12);

  /* 强调色 5 — 玫红（C 重要 CTA） */
  --accent-5: #DC2626;
  --accent-5-soft: rgba(220, 38, 38, 0.08);

  /* 强调色 6 — 绿（成功） */
  --success: #10B981;
  --success-soft: rgba(16, 185, 129, 0.1);

  /* 中性 */
  --black: #0F172A;
  --black-hover: #000000;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.04);
  --shadow-md: 0 8px 32px rgba(10, 37, 64, 0.06);
  --shadow-lg: 0 16px 56px rgba(10, 37, 64, 0.10);
  --shadow-blue: 0 8px 32px rgba(0, 102, 255, 0.15);
  --shadow-orange: 0 8px 32px rgba(255, 107, 91, 0.18);

  /* 圆角 */
  --radius: 20px;
  --radius-sm: 12px;
  --radius-lg: 28px;

  /* 容器 */
  --container: 1200px;
  --nav-h: 52px;

  /* 缓动 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Typography ===== */
.display { font-size: 56px; font-weight: 800; letter-spacing: -0.035em; line-height: 1.05; }
.display-xl { font-size: clamp(48px, 9vw, 120px); font-weight: 800; letter-spacing: -0.04em; line-height: 1.02; }
.h1 { font-size: clamp(32px, 4.5vw, 56px); font-weight: 700; letter-spacing: -0.025em; line-height: 1.1; }
.h2 { font-size: clamp(24px, 3vw, 40px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
.h3 { font-size: clamp(20px, 2vw, 28px); font-weight: 600; letter-spacing: -0.015em; line-height: 1.25; }
.body-lg { font-size: 21px; line-height: 1.45; color: var(--text); }
.body { font-size: 17px; line-height: 1.5; color: var(--text); }
.body-sm { font-size: 15px; line-height: 1.5; color: var(--text-2); }
.caption { font-size: 13px; line-height: 1.4; color: var(--text-3); letter-spacing: 0.01em; }
.mono { font-family: ui-monospace, "SF Mono", "JetBrains Mono", "Menlo", monospace; font-variant-numeric: tabular-nums; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--brand); }

/* ===== Container ===== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (max-width: 680px) { .container { padding: 0 20px; } }

/* ===== Section ===== */
.section { padding: 96px 0; position: relative; }
.section-lg { padding: 140px 0; }
.section-xl { padding: 180px 0; }
@media (max-width: 680px) { .section { padding: 56px 0; } .section-lg { padding: 80px 0; } .section-xl { padding: 100px 0; } }
.section-divider { border-top: 1px solid var(--line); }
.section-head { margin-bottom: 64px; max-width: 880px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .eyebrow { margin-bottom: 16px; display: block; }
.section-head .h1, .section-head .h2 { margin-bottom: 20px; }
.section-head .body-lg { color: var(--text-2); max-width: 720px; }
.section-head.center .body-lg { margin-left: auto; margin-right: auto; }

/* ===== Nav ===== */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  background: rgba(245, 241, 232, 0.78);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s var(--ease);
}
.site-nav.at-top { background: rgba(245, 241, 232, 0.72); }
.site-nav.scrolled { background: rgba(245, 241, 232, 0.92); }
.nav-logo { display: flex; align-items: center; gap: 10px; color: var(--text); font-size: 17px; font-weight: 600; letter-spacing: -0.01em; }
.nav-logo-mark { width: 28px; height: 28px; background: linear-gradient(135deg, var(--brand) 0%, var(--accent-3) 100%); border-radius: 7px; display: flex; align-items: center; justify-content: center; color: #FFF; font-size: 14px; font-weight: 700; }
/* === 桌面端 4 一级菜单（首页 / 学习系统 / AI 引擎 / 关于） === */
.nav-links { display: flex; gap: 2px; align-items: center; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 13px; font-weight: 500; color: var(--text);
  padding: 7px 12px; border-radius: 8px;
  background: transparent; border: 0; cursor: pointer;
  font-family: inherit;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-link:hover { background: rgba(0, 102, 255, 0.06); color: var(--brand); }
.nav-link.active { color: var(--brand); background: rgba(0, 102, 255, 0.06); }
.nav-link .caret { display: inline-block; font-size: 9px; line-height: 1; margin-left: 2px; transition: transform 0.25s var(--ease); opacity: 0.55; }
.nav-item:hover .nav-link .caret,
.nav-item.open .nav-link .caret { transform: rotate(180deg); opacity: 1; }
/* 子菜单（玻璃态下拉） */
.nav-submenu {
  position: absolute; top: calc(100% + 6px); left: 50%;
  min-width: 180px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 6px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
  display: flex; flex-direction: column; gap: 1px;
  opacity: 0; visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s;
  z-index: 110;
}
.nav-item:hover > .nav-submenu,
.nav-item.open > .nav-submenu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-submenu a {
  display: block; padding: 9px 14px; border-radius: 8px;
  font-size: 13px; font-weight: 500; color: var(--text);
  white-space: nowrap; transition: background 0.15s var(--ease), color 0.15s var(--ease);
}
.nav-submenu a:hover { background: rgba(0, 102, 255, 0.06); color: var(--brand); }
.nav-submenu a.active { color: var(--brand); background: rgba(0, 102, 255, 0.06); }

.nav-toggle { display: none; width: 36px; height: 36px; border-radius: 8px; align-items: center; justify-content: center; color: var(--text); }
.nav-toggle:hover { background: rgba(0, 102, 255, 0.06); }
.nav-toggle svg { width: 20px; height: 20px; }
.nav-dropdown {
  display: none; position: fixed; top: var(--nav-h); right: 12px;
  width: max-content; min-width: 240px; max-width: 320px;
  background: rgba(255, 255, 255, 0.96); backdrop-filter: blur(20px);
  border-radius: 16px; padding: 8px; max-height: calc(100vh - 70px); overflow-y: auto;
  box-shadow: var(--shadow-lg); border: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}
.nav-dropdown::-webkit-scrollbar { display: none; }
.nav-dropdown.open { display: block; animation: dropIn 0.25s var(--ease); }
.nav-dropdown a { display: block; padding: 12px 16px; border-radius: 10px; font-size: 15px; font-weight: 500; color: var(--text); }
.nav-dropdown a:hover { background: rgba(0, 0, 0, 0.05); }
.nav-group-title { padding: 14px 16px 4px; font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }
.nav-divider { height: 1px; background: var(--line); margin: 6px 8px; }
@keyframes dropIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
}

/* ===== Hero ===== */
.hero { padding: 160px 0 100px; text-align: center; position: relative; }
.hero .eyebrow { display: block; margin-bottom: 20px; }
.hero h1 { margin-bottom: 24px; }
.hero-sub { color: var(--text-2); max-width: 720px; margin: 0 auto 48px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 80px; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); max-width: 880px; margin: 0 auto; }
.hero-stat { padding: 32px 16px; border-right: 1px solid var(--line); display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 168px; }
.hero-stat:last-child { border-right: none; }
.hero-stat .num { font-size: clamp(36px, 5vw, 56px); font-weight: 800; letter-spacing: -0.03em; line-height: 1; background: linear-gradient(135deg, var(--brand) 0%, var(--accent-1) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 10px; min-height: 60px; display: flex; align-items: flex-end; justify-content: center; width: 100%; }
.hero-stat .label { font-size: 13px; color: var(--text-3); text-align: center; min-height: 18px; }
/* 含图标（milestone-rise）的 hero-stat 居中显示 */
.hero-stat-chart { display: flex; flex-direction: column; align-items: center; justify-content: center; }
.hero-stat-chart .label { text-align: center; margin-top: 4px; }
@media (max-width: 680px) {
  .hero { padding: 120px 0 64px; }
  .hero-cta { margin-bottom: 48px; }
  /* hero-stats 移动端横着排一行：保持 3 列，缩小 padding 和字号 */
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 0; border-bottom: 1px solid var(--line); max-width: 100%; }
  .hero-stat { padding: 16px 4px; min-height: 92px; border-right: 1px solid var(--line); border-bottom: none; }
  .hero-stat:last-child { border-right: none; }
  .hero-stat .num { font-size: 26px; min-height: 30px; margin-bottom: 6px; letter-spacing: -0.02em; }
  .hero-stat .label { font-size: 11px; line-height: 1.3; min-height: 0; }
  .hero-stat-chart .milestone-rise.ms-compact { width: 80%; height: 40px; }
  .hero-stat-sub { font-size: 10px; margin-top: 3px; min-height: 0; line-height: 1.3; }
}

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; border-radius: 980px; font-size: 15px; font-weight: 500; transition: all 0.25s var(--ease); cursor: pointer; letter-spacing: -0.01em; }
.btn-primary { background: var(--brand); color: #FFF; box-shadow: var(--shadow-blue); }
.btn-primary:hover { background: var(--brand-deep); transform: translateY(-1px); box-shadow: 0 12px 40px rgba(0, 102, 255, 0.28); }
.btn-dark { background: var(--black); color: #FFF; }
.btn-dark:hover { background: var(--black-hover); transform: translateY(-1px); }
.btn-orange { background: var(--accent-2); color: #FFF; box-shadow: var(--shadow-orange); }
.btn-orange:hover { background: #E55545; transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--line-strong); }
.btn-secondary:hover { background: var(--brand-soft); border-color: var(--brand); color: var(--brand); }
.btn-link { display: inline-flex; align-items: center; gap: 4px; color: var(--brand); font-size: 15px; font-weight: 500; }
.btn-link .arrow { transition: transform 0.25s var(--ease); }
.btn-link:hover .arrow { transform: translateX(4px); }
.btn-lg { padding: 16px 32px; font-size: 17px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* ===== Cards ===== */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
  position: relative;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--brand); }
.card-eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--brand); margin-bottom: 12px; }
.card-title { font-size: 22px; font-weight: 700; letter-spacing: -0.015em; line-height: 1.2; margin-bottom: 8px; color: var(--text); }
.card-body { font-size: 15px; line-height: 1.5; color: var(--text-2); }

/* 磨玻璃卡片 */
.card-glass {
  background: rgba(255, 255, 255, 0.68);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-md);
  position: relative;
}

/* 顶部色条卡片（4 引擎/痛点用） */
.card-tinted {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px 28px;
  position: relative; overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.card-tinted::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--tint-color, var(--brand));
}
.card-tinted:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-tinted.tint-blue { --tint-color: var(--brand); }
.card-tinted.tint-mint { --tint-color: var(--accent-1); }
.card-tinted.tint-purple { --tint-color: var(--accent-3); }
.card-tinted.tint-orange { --tint-color: var(--accent-2); }
.card-tinted.tint-amber { --tint-color: var(--accent-4); }
.card-tinted.tint-pink { --tint-color: #EC4899; }

/* 详情页里的 emoji + 渐变图标方块（替代 inline style） */
.icon-square {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: #FFF; font-size: 20px; font-weight: 700;
  background: var(--icon-bg, var(--brand));
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}
.icon-square.bg-purple { background: linear-gradient(135deg, #7C3AED, #6366F1); }
.icon-square.bg-blue { background: linear-gradient(135deg, #0066FF, #2563EB); }
.icon-square.bg-mint { background: linear-gradient(135deg, #00C7B7, #0066FF); }
.icon-square.bg-orange { background: linear-gradient(135deg, #FF6B5B, #EA580C); }
.icon-square.bg-amber { background: linear-gradient(135deg, #F59E0B, #DC2626); }
.icon-square.bg-pink { background: linear-gradient(135deg, #EC4899, #DC2626); }
.icon-square.bg-rose { background: linear-gradient(135deg, #F43F5E, #EC4899); }
.icon-square.bg-night { background: linear-gradient(135deg, #0F172A, #7C3AED); }
.icon-square.bg-gray { background: linear-gradient(135deg, #94A3B8, #475569); }

/* theme-gray / box-gray：传统对答案那种灰 */
.theme-gray { --tint-color: #94A3B8; }
.box-gray { background: linear-gradient(135deg, #94A3B8, #475569); }

/* hero-dual：顶部双卡对比（广场/拍题豆 用） */
.hero-dual { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 32px auto 0; max-width: 620px; }
@media (max-width: 768px) { .hero-dual { grid-template-columns: 1fr 1fr; gap: 10px; max-width: 100%; } .hero-dual-card { padding: 14px 10px; } .hero-dual-card .hd-icon { width: 36px; height: 36px; border-radius: 10px; margin-bottom: 6px; } .hero-dual-card .hd-icon svg { width: 18px; height: 18px; } .hero-dual-card .hd-eyebrow { font-size: 9px; } .hero-dual-card .hd-title { font-size: 15px; } .hero-dual-card .hd-sub { font-size: 11px; } }
.hero-dual-card {
  position: relative;
  padding: 24px 20px;
  border-radius: 16px;
  background: #FFF;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 5px;
  transition: transform 250ms ease, box-shadow 250ms ease;
  text-decoration: none;
}
.hero-dual-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.06); }
.hero-dual-card .hd-icon { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #FFF; flex-shrink: 0; margin-bottom: 8px; }
.hero-dual-card .hd-icon svg { width: 22px; height: 22px; fill: none; stroke: #FFF; stroke-width: 2; }
.hero-dual-card .hd-icon svg path,
.hero-dual-card .hd-icon svg polyline,
.hero-dual-card .hd-icon svg line,
.hero-dual-card .hd-icon svg circle,
.hero-dual-card .hd-icon svg rect { fill: none; stroke: #FFF; stroke-width: 2; }
.hero-dual-card.hd-green .hd-icon { background: linear-gradient(135deg, #00C7B7, #0066FF); }
.hero-dual-card.hd-amber .hd-icon { background: linear-gradient(135deg, #F59E0B, #DC2626); }
.hero-dual-card.hd-rose .hd-icon { background: linear-gradient(135deg, #F43F5E, #EC4899); }
.hero-dual-card.hd-blue .hd-icon { background: linear-gradient(135deg, #0066FF, #2563EB); }
.hero-dual-card.hd-purple .hd-icon { background: linear-gradient(135deg, #7C3AED, #6366F1); }
.hero-dual-card.hd-orange .hd-icon { background: linear-gradient(135deg, #FF6B5B, #EA580C); }
.hero-dual-card.hd-night .hd-icon { background: linear-gradient(135deg, #0F172A, #7C3AED); }
.hero-dual-card .hd-text { display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 0; }
.hero-dual-card .hd-eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; color: #6E6E73; text-transform: uppercase; }
.hero-dual-card .hd-title { font-size: 18px; font-weight: 800; color: #1D1D1F; letter-spacing: -0.01em; line-height: 1.2; }
.hero-dual-card .hd-sub { font-size: 13px; line-height: 1.4; color: #6E6E73; }
.hero-dual-card .hd-arrow { display: none; }

/* type-grid：判卷覆盖题型横排 grid */
.type-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 32px; }
@media (max-width: 768px) { .type-grid { grid-template-columns: repeat(2, 1fr); } }
.type-chip {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 16px; border-radius: 12px;
  background: #FFF; border: 1px solid rgba(0,0,0,0.06);
  font-size: 14px; font-weight: 600; color: #1D1D1F;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  transition: transform 200ms ease;
}
.type-chip:hover { transform: translateY(-2px); }
.type-chip .type-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.type-chip.type-blue .type-dot { background: #0066CC; }
.type-chip.type-purple .type-dot { background: #7C3AED; }
.type-chip.type-amber .type-dot { background: #F59E0B; }
.type-chip.type-orange .type-dot { background: #EA580C; }
.type-chip.type-rose .type-dot { background: #F43F5E; }
.type-chip.type-mint .type-dot { background: #00C7B7; }

/* section-quote：板块内大段引用框 */
.section-quote {
  max-width: 720px; margin: 0 auto;
  padding: 32px 40px;
  background: #FFF;
  border-radius: 20px;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 4px 24px rgba(0,0,0,0.04);
  text-align: center;
}
.section-quote .quote-mark { font-size: 48px; line-height: 1; color: var(--tint-color, #0066CC); font-weight: 800; font-family: Inter, sans-serif; }
.section-quote p { font-size: 18px; line-height: 1.6; color: #1D1D1F; margin: 12px 0 0; font-weight: 500; }

/* 彩色 chip / 标签（替代详情页 inline 颜色） */
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 12px; border-radius: var(--r-pill);
  font-size: 12px; font-weight: 600;
  background: var(--chip-bg, var(--brand-soft));
  color: var(--chip-fg, var(--brand));
}
.chip.chip-blue { --chip-bg: rgba(0,102,255,0.10); --chip-fg: #0040CC; }
.chip.chip-purple { --chip-bg: rgba(124,58,237,0.10); --chip-fg: #6D28D9; }
.chip.chip-mint { --chip-bg: rgba(0,199,183,0.12); --chip-fg: #0E7490; }
.chip.chip-orange { --chip-bg: rgba(234,88,12,0.10); --chip-fg: #C2410C; }
.chip.chip-amber { --chip-bg: rgba(245,158,11,0.12); --chip-fg: #B45309; }
.chip.chip-pink { --chip-bg: rgba(236,72,153,0.10); --chip-fg: #BE185D; }
.chip.chip-red { --chip-bg: rgba(220,38,38,0.10); --chip-fg: #B91C1C; }
.chip.chip-green { --chip-bg: rgba(16,185,129,0.12); --chip-fg: #047857; }

/* mini-card 渐变小卡片（用于游戏化等页） */
.mini-card {
  padding: 16px 14px; border-radius: 14px;
  text-align: center; transition: transform 0.3s var(--ease);
}
.mini-card:hover { transform: translateY(-2px); }
.mini-card.bg-violet { background: linear-gradient(135deg, #F5F3FF, #C4B5FD); }
.mini-card.bg-violet .mini-card-title { color: #6D28D9; }
.mini-card.bg-violet .mini-card-sub { color: #5B21B6; }
.mini-card.bg-mint { background: linear-gradient(135deg, #ECFDF5, #84E0B8); }
.mini-card.bg-mint .mini-card-title { color: #047857; }
.mini-card.bg-mint .mini-card-sub { color: #065F46; }
.mini-card.bg-peach { background: linear-gradient(135deg, #FFF1E6, #FFBFA0); }
.mini-card.bg-peach .mini-card-title { color: #C2410C; }
.mini-card.bg-peach .mini-card-sub { color: #9A3412; }
.mini-card.bg-sky { background: linear-gradient(135deg, #E0F2FE, #7DD3FC); }
.mini-card.bg-sky .mini-card-title { color: #0369A1; }
.mini-card.bg-sky .mini-card-sub { color: #075985; }
.mini-card.bg-rose { background: linear-gradient(135deg, #FFE4E6, #FDA4AF); }
.mini-card.bg-rose .mini-card-title { color: #BE123C; }
.mini-card.bg-rose .mini-card-sub { color: #9F1239; }
.mini-card-title { font-size: 15px; font-weight: 700; line-height: 1.3; }
.mini-card-sub { font-size: 12px; margin-top: 2px; }
.mini-card-icon { font-size: 28px; margin-bottom: 6px; line-height: 1; }

/* 渐变背景区块（用于游戏化/分析等页强调） */
.section-tinted {
  background: linear-gradient(180deg, rgba(0, 199, 183, 0.04) 0%, rgba(0, 102, 255, 0.04) 100%);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  margin: 0 24px;
}
.section-tinted.tint-purple {
  background: linear-gradient(180deg, rgba(124, 58, 237, 0.05) 0%, rgba(255, 107, 91, 0.05) 100%);
}
.section-tinted.tint-warm {
  background: linear-gradient(180deg, rgba(255, 107, 91, 0.05) 0%, rgba(245, 158, 11, 0.05) 100%);
}
.section-tinted.tint-cool {
  background: linear-gradient(180deg, rgba(0, 199, 183, 0.05) 0%, rgba(0, 102, 255, 0.05) 100%);
}

/* ===== Grid ===== */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }
@media (max-width: 880px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-5 { grid-template-columns: repeat(3, 1fr); } .grid-6 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 680px) { .grid-3, .grid-4 { grid-template-columns: 1fr; } .grid-5 { grid-template-columns: repeat(2, 1fr); } .grid-6 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-2 { grid-template-columns: 1fr; } .grid-5 { grid-template-columns: 1fr; } .grid-6 { grid-template-columns: 1fr; } }

/* ===== Feature Card (大号) ===== */
.feature {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.feature::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature:hover::before { transform: scaleX(1); }
.feature-num { font-size: 13px; font-weight: 700; color: var(--brand); margin-bottom: 24px; letter-spacing: 0.08em; }
.feature-title { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 16px; }
.feature-body { font-size: 17px; line-height: 1.5; color: var(--text-2); }
.feature-list { margin-top: 24px; display: flex; flex-direction: column; gap: 12px; }
.feature-list li { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: var(--text); }
.feature-list .dot { width: 6px; height: 6px; background: var(--brand); border-radius: 50%; margin-top: 9px; flex-shrink: 0; }
@media (max-width: 680px) { .feature { padding: 32px 24px; } }

/* ===== Bignum (Apple-style number display) ===== */
.bignum-wrap { padding: 120px 0; text-align: center; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); position: relative; }
.bignum-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, var(--brand-soft) 0%, transparent 70%);
  pointer-events: none;
}
.bignum-eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--brand); margin-bottom: 32px; }
.bignum-row { display: flex; justify-content: center; align-items: baseline; gap: 16px; flex-wrap: wrap; position: relative; }
.bignum { font-size: clamp(64px, 12vw, 160px); font-weight: 800; letter-spacing: -0.05em; line-height: 0.95; background: linear-gradient(135deg, var(--brand) 0%, var(--accent-3) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-variant-numeric: tabular-nums; }
.bignum-suffix { font-size: clamp(24px, 3vw, 40px); font-weight: 600; color: var(--text-2); }
.bignum-caption { margin-top: 24px; font-size: 15px; color: var(--text-2); max-width: 600px; margin-left: auto; margin-right: auto; }

/* ===== Compare Table ===== */
.compare { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.compare-col { padding: 40px 32px; }
.compare-col.old { background: var(--bg-sub); }
.compare-col.new { background: var(--bg-elev); position: relative; }
.compare-col.new::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--accent-1) 100%);
}
.compare-head { font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 24px; }
.compare-col.new .compare-head { color: var(--brand); }
.compare-row { padding: 20px 0; border-top: 1px solid var(--line); display: flex; align-items: flex-start; gap: 16px; }
.compare-row:first-of-type { border-top: none; }
.compare-label { font-size: 15px; color: var(--text); flex: 1; }
.compare-mark { width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 12px; }
.compare-mark.no { background: rgba(10, 37, 64, 0.08); color: var(--text-3); }
.compare-mark.yes { background: var(--accent-1); color: #FFF; }
@media (max-width: 680px) { .compare { grid-template-columns: 1fr; } .compare-col { padding: 32px 24px; } }

/* ===== Hero Showcase · 6 张 APP 界面（重写版） ===== */
.showcase {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  max-width: 1200px;
  margin: 0 auto;
}
.showcase-item {
  position: relative;
  display: block;
  min-width: 0;
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 22px;
  padding: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.showcase-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.10);
}
.showcase-item img {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 19;
  object-fit: cover;
  border-radius: 16px;
  background: #F5F5F7;
}
/* Pad 端：3 列 */
@media (max-width: 1100px) {
  .showcase { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}
/* 手机端：2 列 */
@media (max-width: 720px) {
  .showcase { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

/* ===== CTA Section ===== */
.cta-section { padding: 140px 0; text-align: center; border-top: 1px solid var(--line); }
.cta-section .h1 { margin-bottom: 24px; }
.cta-section .body-lg { color: var(--text-2); max-width: 640px; margin: 0 auto 40px; }

/* ===== Footer ===== */
.site-footer { padding: 48px 0 32px; border-top: 1px solid var(--line); }
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 32px; padding-bottom: 32px; border-bottom: 1px solid var(--line); }
.footer-brand { max-width: 360px; }
.footer-brand .nav-logo { margin-bottom: 12px; }
.footer-brand p { font-size: 13px; color: var(--text-2); line-height: 1.5; }
.footer-links { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h5 { font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 14px; }
.footer-col a { display: block; font-size: 13px; color: var(--text-2); padding: 4px 0; transition: color 0.2s; }
.footer-col a:hover { color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; font-size: 12px; color: var(--text-3); }
@media (max-width: 680px) {
  .site-footer { padding: 36px 0 24px; }
  .site-footer .container { text-align: center; }
  .footer-top { flex-direction: column; align-items: center; gap: 28px; }
  .footer-brand { max-width: 100%; text-align: center; display: flex; flex-direction: column; align-items: center; }
  .footer-brand .nav-logo { display: inline-flex; align-self: center; margin: 0 auto 14px; }
  .footer-brand p { text-align: center; margin: 0 auto; }
  /* 3 个分类保持水平排列（左中右） */
  .footer-links { flex-direction: row; gap: 24px; width: 100%; justify-content: center; align-items: flex-start; }
  .footer-col { text-align: center; flex: 1 1 0; min-width: 0; }
  .footer-col h5 { margin-bottom: 12px; }
  .footer-col a { display: block; padding: 4px 0; font-size: 13px; }
  .footer-bottom { flex-direction: column; align-items: center; justify-content: center; gap: 8px; text-align: center; }
  .footer-bottom span,
  .footer-bottom .beian-link { text-align: center; }
}

/* ===== ICP 备案链接 ===== */
.beian-link { display: inline-flex; align-items: center; gap: 5px; color: var(--text-3); text-decoration: none; transition: color 0.2s; font-feature-settings: "tnum"; }
.beian-link:hover { color: var(--text); }
.beian-link:hover .beian-icon { transform: scale(1.08); }
.footer-beian-group { display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.beian-sep { color: var(--text-3); opacity: 0.4; font-size: 12px; }
.beian-icon { width: 16px; height: 16px; flex-shrink: 0; transition: transform 0.2s ease; }

/* ===== Detail page hero ===== */
.page-hero { padding: 140px 0 80px; text-align: center; }
.page-hero .eyebrow { display: block; margin-bottom: 20px; }
.page-hero h1 { margin-bottom: 24px; }
.page-hero .body-lg { color: var(--text-2); max-width: 720px; margin: 0 auto; }

/* ===== Section title bar (legacy compat) ===== */
.section-title-bar { display: flex; align-items: flex-start; gap: 14px; padding: 0 0 32px; }
.section-title-bar .bar { width: 3px; min-height: 56px; background: linear-gradient(180deg, var(--brand) 0%, var(--accent-1) 100%); border-radius: 2px; flex-shrink: 0; }
.section-title-bar h2 { font-size: clamp(28px, 3.5vw, 40px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; color: var(--text); }
.section-title-bar .sub { font-size: 17px; color: var(--text-2); margin-top: 8px; }

/* ===== Step detail card (legacy compat) ===== */
.step-detail { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease); }
.step-detail:hover { border-color: var(--brand); box-shadow: var(--shadow-md); }
.step-detail h4 { font-size: 22px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 12px; letter-spacing: -0.015em; }
.step-detail h4 .step-num { width: 32px; height: 32px; background: linear-gradient(135deg, var(--brand) 0%, var(--accent-3) 100%); color: #FFF; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; }
.step-detail > p { font-size: 16px; line-height: 1.6; color: var(--text-2); margin-bottom: 20px; }
.step-detail .features { display: flex; flex-direction: column; gap: 10px; }
.step-detail .feature-item { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; color: var(--text); }
.step-detail .feature-item .check { width: 20px; height: 20px; border-radius: 50%; background: var(--accent-1); color: #FFF; display: flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0; margin-top: 1px; }

/* ===== Table-like lists (legacy compat) ===== */
.step-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 20px; }
.step-features .sf-item { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.step-features .sf-item h5 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.step-features .sf-item p { font-size: 14px; color: var(--text-2); line-height: 1.5; }
@media (max-width: 680px) { .step-features { grid-template-columns: 1fr; } }

/* ===== Content Block (for detail pages) ===== */
.content-block { padding: 80px 0; border-top: 1px solid var(--line); }
.content-block .h2 { margin-bottom: 24px; }
.content-block .body { color: var(--text-2); max-width: 720px; }
.content-block .body + .body { margin-top: 16px; }
.block-list { margin-top: 32px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.block-item { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.block-item h4 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.block-item p { font-size: 14px; color: var(--text-2); line-height: 1.5; }
@media (max-width: 680px) { .block-list { grid-template-columns: 1fr; } }

/* ===== Process step ===== */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.process-step { padding: 32px 24px; border-left: 1px solid var(--line); }
.process-step:first-child { border-left: none; }
.process-step .step-num { font-size: 13px; font-weight: 700; color: var(--brand); margin-bottom: 16px; letter-spacing: 0.08em; }
.process-step h4 { font-size: 22px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.015em; }
.process-step p { font-size: 14px; color: var(--text-2); line-height: 1.5; }
@media (max-width: 880px) { .process { grid-template-columns: repeat(2, 1fr); } .process-step { border-left: none; border-top: 1px solid var(--line); padding: 24px 0; } .process-step:first-child, .process-step:nth-child(2) { border-top: none; } }
@media (max-width: 480px) { .process { grid-template-columns: 1fr; } }

/* ===== Detail nav (sub-nav under page hero) ===== */
.hero-pill { display:inline-block; font-size: 12px; font-weight: 600; color: var(--text-2); padding: 7px 14px; border-radius: 980px; border: 1px solid var(--line-strong); background: var(--bg-elev); letter-spacing: 0.01em; }
.detail-subnav { display: flex; justify-content: center; gap: 4px; margin-top: 40px; flex-wrap: wrap; }
.detail-subnav a { font-size: 13px; padding: 8px 14px; border-radius: 980px; color: var(--text-2); transition: all 0.2s; }
.detail-subnav a:hover { background: rgba(0, 0, 0, 0.05); color: var(--text); }
.detail-subnav a.current { background: var(--brand); color: #FFF; }

/* ===== Reveal animations ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(20px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal-stagger.visible > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.07s; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.14s; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.21s; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.28s; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.35s; }
.reveal-stagger.visible > *:nth-child(7) { transition-delay: 0.42s; }
.reveal-stagger.visible > *:nth-child(8) { transition-delay: 0.49s; }
.reveal-stagger.visible > *:nth-child(9) { transition-delay: 0.56s; }
.reveal-stagger.visible > *:nth-child(10) { transition-delay: 0.63s; }
.reveal-stagger.visible > *:nth-child(11) { transition-delay: 0.70s; }
.reveal-stagger.visible > *:nth-child(12) { transition-delay: 0.77s; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-stagger > * { opacity: 1; transform: none; transition: none; }
}

/* ===== Mobile menu body lock ===== */
body.menu-open { overflow: hidden; }

/* ===== Inline text emphasis ===== */
.text-accent { color: var(--brand); }
.text-mute { color: var(--text-2); }
.text-faint { color: var(--text-3); }
.text-orange { color: var(--accent-2); }
.text-mint { color: var(--accent-1); }
.text-purple { color: var(--accent-3); }
.text-warm { color: var(--accent-4); }

/* ===== Pain point cards (5 大痛点) ===== */
.pain-card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease); position: relative; overflow: hidden; }
.pain-card::before { content: ''; position: absolute; top: 0; left: 0; width: 48px; height: 3px; background: var(--brand); }
.pain-card.c2::before { background: var(--accent-1); }
.pain-card.c3::before { background: var(--accent-3); }
.pain-card.c4::before { background: var(--accent-2); }
.pain-card.c5::before { background: var(--accent-4); }
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--brand); }
.pain-card .num { font-size: 13px; font-weight: 700; letter-spacing: 0.1em; color: var(--brand); margin-bottom: 18px; }
.pain-card.c2 .num { color: var(--accent-1); }
.pain-card.c3 .num { color: var(--accent-3); }
.pain-card.c4 .num { color: var(--accent-2); }
.pain-card.c5 .num { color: var(--accent-4); }
.pain-card .title { font-size: 22px; font-weight: 700; letter-spacing: -0.015em; margin-bottom: 12px; }
.pain-card .body { font-size: 15px; line-height: 1.55; color: var(--text-2); margin-bottom: 20px; }
.pain-card .arrow { color: var(--brand); font-size: 13px; font-weight: 600; }

/* ===== Engine card (4 AI 引擎) ===== */
.engine-card { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease); position: relative; overflow: hidden; }
.engine-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--brand); transition: height 0.3s var(--ease); }
.engine-card.e2::before { background: var(--accent-1); }
.engine-card.e3::before { background: var(--accent-3); }
.engine-card.e4::before { background: var(--accent-2); }
.engine-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.engine-card:hover::before { height: 6px; }
.engine-card .tag { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--brand); margin-bottom: 16px; }
.engine-card.e2 .tag { color: var(--accent-1); }
.engine-card.e3 .tag { color: var(--accent-3); }
.engine-card.e4 .tag { color: var(--accent-2); }
.engine-card .title { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 12px; }
.engine-card .body { font-size: 15px; line-height: 1.55; color: var(--text-2); }

/* ===== Rating bar (词典引擎评级条) ===== */
.rating-bars { display: flex; flex-direction: column; gap: 18px; }
.rating-row { display: grid; grid-template-columns: 140px 1fr 60px; gap: 16px; align-items: center; }
.rating-label { font-size: 14px; color: var(--text); font-weight: 500; }
.rating-bar { height: 24px; background: var(--bg-sub); border-radius: 6px; overflow: hidden; position: relative; }
.rating-fill { height: 100%; border-radius: 6px; transition: width 1.2s var(--ease); position: relative; }
.rating-fill::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 100%); }
.rating-pct { font-size: 15px; font-weight: 700; color: var(--text); text-align: right; font-variant-numeric: tabular-nums; }
@media (max-width: 560px) { .rating-row { grid-template-columns: 100px 1fr 50px; gap: 10px; } .rating-label { font-size: 13px; } .rating-pct { font-size: 14px; } }

/* ===== Showcase (App 截图) ===== */
/* Pad 端：3 列 */
.num-gradient { background: linear-gradient(135deg, var(--brand) 0%, var(--accent-1) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ===== Footer accent ===== */
.site-footer { background: var(--bg-sub); }

/* ===== Tag chip ===== */
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 980px; font-size: 12px; font-weight: 600; letter-spacing: 0.02em; }
.chip-blue { background: var(--brand-soft); color: var(--brand); }
.chip-mint { background: var(--accent-1-soft); color: var(--accent-1); }
.chip-orange { background: var(--accent-2-soft); color: var(--accent-2); }
.chip-purple { background: var(--accent-3-soft); color: var(--accent-3); }
.chip-warm { background: var(--accent-4-soft); color: #C97A1F; }
.chip-success { background: var(--success-soft); color: var(--success); }

/* ===== Engine Card Themes (4 引擎差异化) ===== */
.card { position: relative; overflow: hidden; }
.card .card-eyebrow { transition: color 0.4s var(--ease); }
.card .card-title { transition: color 0.4s var(--ease); }

/* 引擎 1: 薄荷青 (词典) */
.card.theme-mint::before { background: linear-gradient(135deg, #00C7B7 0%, #0EA5E9 100%); }
.card.theme-mint:hover { border-color: rgba(0, 199, 183, 0.35); }
.card.theme-mint .card-eyebrow { color: #0E7490; }
.card.theme-mint:hover .card-title { color: #0E7490; }

/* 引擎 2: 紫色 (语法) */
.card.theme-purple::before { background: linear-gradient(135deg, #7C3AED 0%, #A855F7 100%); }
.card.theme-purple:hover { border-color: rgba(124, 58, 237, 0.35); }
.card.theme-purple .card-eyebrow { color: #6D28D9; }
.card.theme-purple:hover .card-title { color: #6D28D9; }

/* 引擎 3: 暖橙 (声韵) */
.card.theme-orange::before { background: linear-gradient(135deg, #F97316 0%, #FB7185 100%); }
.card.theme-orange:hover { border-color: rgba(249, 115, 22, 0.35); }
.card.theme-orange .card-eyebrow { color: #C2410C; }
.card.theme-orange:hover .card-title { color: #C2410C; }

/* 引擎 4: 玫粉 (分析) */
.card.theme-rose::before { background: linear-gradient(135deg, #DC2626 0%, #FF6B5B 100%); }
.card.theme-rose:hover { border-color: rgba(220, 38, 38, 0.35); }
.card.theme-rose .card-eyebrow { color: #B91C1C; }
.card.theme-rose:hover .card-title { color: #B91C1C; }

/* PACE 系统: 蓝青 */
.card.theme-pace::before { background: linear-gradient(135deg, #0066FF 0%, #00C7B7 100%); }
.card.theme-pace:hover { border-color: rgba(0, 102, 255, 0.35); }
.card.theme-pace .card-eyebrow { color: #0040CC; }
.card.theme-pace:hover .card-title { color: #0040CC; }

/* GPS 系统: 紫粉 */
.card.theme-gps::before { background: linear-gradient(135deg, #7C3AED 0%, #FF6B5B 100%); }
.card.theme-gps:hover { border-color: rgba(124, 58, 237, 0.35); }
.card.theme-gps .card-eyebrow { color: #6D28D9; }
.card.theme-gps:hover .card-title { color: #6D28D9; }

/* ===== Loop Cycle (学练追踪复现 真正的循环) ===== */
.loop-cycle {
  position: relative;
  width: 100%;
  max-width: 520px;
  margin: 48px auto 0;
  aspect-ratio: 1;
}
.loop-cycle svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.loop-node {
  position: absolute;
  width: 28%;
  aspect-ratio: 1;
  background: white;
  border: 2px solid var(--line);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  z-index: 2;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
  cursor: pointer;
}
.loop-node:hover { transform: scale(1.08); box-shadow: 0 12px 36px rgba(15, 23, 42, 0.15); }
.loop-node .loop-num { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; opacity: 0.6; }
.loop-node .loop-name { font-size: 24px; margin-top: 2px; }
.loop-node .loop-en { font-size: 10px; font-weight: 500; letter-spacing: 0.08em; opacity: 0.5; margin-top: 2px; }

.loop-node.node-1 { top: 0; left: 50%; transform: translateX(-50%); border-color: rgba(0, 199, 183, 0.5); color: #0E7490; }
.loop-node.node-2 { top: 50%; right: 0; transform: translateY(-50%); border-color: rgba(124, 58, 237, 0.5); color: #6D28D9; }
.loop-node.node-3 { bottom: 0; left: 50%; transform: translateX(-50%); border-color: rgba(249, 115, 22, 0.5); color: #C2410C; }
.loop-node.node-4 { top: 50%; left: 0; transform: translateY(-50%); border-color: rgba(220, 38, 38, 0.5); color: #B91C1C; }

.loop-node.node-1:hover { transform: translateX(-50%) scale(1.08); }
.loop-node.node-2:hover { transform: translateY(-50%) scale(1.08); }
.loop-node.node-3:hover { transform: translateX(-50%) scale(1.08); }
.loop-node.node-4:hover { transform: translateY(-50%) scale(1.08); }

.loop-arc {
  position: absolute;
  width: 90%;
  height: 90%;
  top: 5%;
  left: 5%;
  z-index: 0;
  pointer-events: none;
}
.loop-center-label {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.05em;
  text-align: center;
  z-index: 3;
  background: white;
  padding: 8px 16px;
  border-radius: 980px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

@media (max-width: 680px) {
  .loop-cycle { max-width: 320px; }
  .loop-node .loop-name { font-size: 18px; }
}

/* section-tinted-* 已停用：避免大面积米色/暖色块，仅靠卡片区分 */

/* ===== Stat card with icon (用于词汇资源库) ===== */
.stat-card {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.stat-card .stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
}
.stat-card .stat-num {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat-card .stat-label { font-size: 15px; color: var(--text-2); font-weight: 500; }
.stat-card .stat-foot { font-size: 13px; color: var(--text-3); margin-top: 4px; }

.stat-card.bg-blue .stat-icon { background: linear-gradient(135deg, #0066FF 0%, #00C7B7 100%); color: white; }
.stat-card.bg-blue .stat-num { color: #0040CC; }
.stat-card.bg-purple .stat-icon { background: linear-gradient(135deg, #7C3AED 0%, #A855F7 100%); color: white; }
.stat-card.bg-purple .stat-num { color: #6D28D9; }
.stat-card.bg-orange .stat-icon { background: linear-gradient(135deg, #F97316 0%, #FB7185 100%); color: white; }
.stat-card.bg-orange .stat-num { color: #C2410C; }
.stat-card.bg-mint .stat-icon { background: linear-gradient(135deg, #00C7B7 0%, #34D399 100%); color: white; }
.stat-card.bg-mint .stat-num { color: #0E7490; }
.stat-card.bg-rose .stat-icon { background: linear-gradient(135deg, #DC2626 0%, #FF6B5B 100%); color: white; }
.stat-card.bg-rose .stat-num { color: #B91C1C; }
.stat-card.bg-amber .stat-icon { background: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%); color: white; }
.stat-card.bg-amber .stat-num { color: #B45309; }

@media (max-width: 680px) {
  .stat-card { padding: 24px 20px; }
  .stat-card .stat-num { font-size: 42px; }
}

/* ===== Decorative divider for sections ===== */
.section-deco {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 0 auto 24px;
  max-width: 200px;
}
.section-deco::before, .section-deco::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--line-strong) 50%, transparent 100%);
}
.section-deco-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.12);
}

/* ===== Improved Showcase (App 截图) ===== */
/* 4 引擎 / tinted section 着色已全部改为透明，仅靠卡片区分 */

/* ===== Forced readability on dark/inline backgrounds ===== */
.card-eyebrow, .card-title, .card-body, .feature-title, .feature-body, .bignum-suffix, .bignum-caption { color: inherit; }

/* === Cycle Diagram (游戏化正向循环) === */
.cycle-wrap {
  position: relative;
  max-width: 420px;
  margin: 0 auto;
  aspect-ratio: 1;
}
.cycle-svg {
  width: 100%;
  height: 100%;
  display: block;
}
.cycle-svg g { transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1); cursor: pointer; }
.cycle-svg g:hover { transform: scale(1.08); transform-origin: center; }
.cycle-svg g circle { filter: drop-shadow(0 4px 12px rgba(0,0,0,0.15)); }

.cycle-label {
  padding: 16px 12px;
  border-radius: 16px;
  text-align: center;
  position: relative;
  border: 1px solid rgba(0,0,0,0.06);
}
.cycle-label-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.cycle-label-text {
  font-size: 13px;
  font-weight: 600;
  color: #0F172A;
  line-height: 1.5;
}
.cycle-label.theme-orange { background: rgba(249, 115, 22, 0.08); }
.cycle-label.theme-orange .cycle-label-num { color: #EA580C; }
.cycle-label.theme-mint { background: rgba(16, 185, 129, 0.08); }
.cycle-label.theme-mint .cycle-label-num { color: #059669; }
.cycle-label.theme-amber { background: rgba(245, 158, 11, 0.10); }
.cycle-label.theme-amber .cycle-label-num { color: #D97706; }
.cycle-label.theme-purple { background: rgba(124, 58, 237, 0.08); }
.cycle-label.theme-purple .cycle-label-num { color: #7C3AED; }

@media (prefers-reduced-motion: reduce) {
  .cycle-svg g, .cycle-svg g:hover { transform: none; }
}

/* ============================================================
   18+ SVG 图标系统（替代 emoji）
   使用 currentColor 跟随父元素颜色
   调用：<svg class="icon"><use href="#icon-xxx"/></svg>
   ============================================================ */
.svg-icon { width: 1em; height: 1em; vertical-align: -0.125em; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; display: inline-block; flex-shrink: 0; }
.svg-icon-32 { width: 32px; height: 32px; }
.svg-icon-40 { width: 40px; height: 40px; }
.svg-icon-48 { width: 48px; height: 48px; }
.svg-icon-64 { width: 64px; height: 64px; }
.svg-icon-80 { width: 80px; height: 80px; }

/* ============================================================
   新组件 class
   ============================================================ */

/* 1. icon-box — 圆形/方块 icon 容器（用于引擎/能力/积分商品） */
/* 紧凑型 tinted-card：用于广场等需要密集展示的场景 */
.tinted-card.compact { padding: 24px 22px; }
.tinted-card.compact .icon-box { width: 40px; height: 40px; border-radius: 12px; margin-bottom: 14px; box-shadow: 0 4px 14px rgba(15, 23, 42, 0.10); }
.tinted-card.compact .icon-box svg { width: 20px; height: 20px; }
.tinted-card.compact .tc-eyebrow { font-size: 11px; letter-spacing: 0.10em; margin-bottom: 6px; }
.tinted-card.compact .tc-title { font-size: 18px; line-height: 1.35; margin-bottom: 6px; }
.tinted-card.compact .tc-body { font-size: 13.5px; line-height: 1.55; margin-bottom: 12px; }
.tinted-card.compact .tc-list { gap: 6px; }
.tinted-card.compact .tc-list li { font-size: 13px; padding-left: 16px; }
.tinted-card.compact .tc-list .dot { width: 5px; height: 5px; }

/* 极小型卡片：高度/宽度整体瘦身（共创广场 & 精选广场） */
.tinted-card.mini { padding: 12px 12px; border-radius: 14px; }
.tinted-card.mini .icon-box { width: 24px; height: 24px; border-radius: 7px; margin-bottom: 8px; box-shadow: none; }
.tinted-card.mini .icon-box svg { width: 13px; height: 13px; }
.tinted-card.mini .tc-eyebrow { font-size: 9px; letter-spacing: 0.08em; margin-bottom: 3px; }
.tinted-card.mini .tc-title { font-size: 13px; line-height: 1.25; margin-bottom: 3px; }
.tinted-card.mini .tc-body { font-size: 10.5px; line-height: 1.45; margin-bottom: 6px; }
.tinted-card.mini .tc-list { margin-top: 4px; gap: 3px; }
.tinted-card.mini .tc-list li { font-size: 10px; padding-left: 11px; gap: 4px; }
.tinted-card.mini .tc-list .dot { width: 4px; height: 4px; margin-top: 5px; }

/* 小型 section：纵向间距更紧凑 */
.section-sm { padding: 64px 0; }
@media (max-width: 768px) { .section-sm { padding: 44px 0; } }

.icon-box {
  width: 56px; height: 56px; border-radius: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #FFF; font-size: 24px; font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.12);
}
.icon-box.box-mint { background: linear-gradient(135deg, #00C7B7 0%, #06B6D4 100%); }
.icon-box.box-blue { background: linear-gradient(135deg, #0066FF 0%, #2563EB 100%); }
.icon-box.box-purple { background: linear-gradient(135deg, #7C3AED 0%, #A855F7 100%); }
.icon-box.box-orange { background: linear-gradient(135deg, #F97316 0%, #FB7185 100%); }
.icon-box.box-amber { background: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%); }
.icon-box.box-rose { background: linear-gradient(135deg, #DC2626 0%, #FF6B5B 100%); }
.icon-box.box-green { background: linear-gradient(135deg, #10B981 0%, #34D399 100%); }
.icon-box.box-pink { background: linear-gradient(135deg, #EC4899 0%, #F472B6 100%); }
.icon-box.box-cyan { background: linear-gradient(135deg, #0891B2 0%, #06B6D4 100%); }
.icon-box.box-dark { background: linear-gradient(135deg, #0F172A 0%, #334155 100%); }

.icon-box-lg { width: 72px; height: 72px; border-radius: 22px; font-size: 32px; }
.icon-box-sm { width: 40px; height: 40px; border-radius: 12px; font-size: 18px; }

/* 2. feature-grid — 4 引擎/4 能力大卡片 grid */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 960px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }

/* 3. feature-large — 单大能力卡片（如雷达图、曲线图） */
.feature-large { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 40px 32px; transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease); position: relative; overflow: hidden; }
.feature-large:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.feature-large-head { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.feature-large-head h3 { font-size: 22px; font-weight: 700; letter-spacing: -0.015em; }
.feature-large-head p { font-size: 14px; color: var(--text-3); margin-top: 2px; }
.feature-large-body { font-size: 15px; line-height: 1.6; color: var(--text-2); }

/* 4. tinted-card — 浅色底大卡片（统一每个能力的主色块） */
.tinted-card {
  background: var(--tint-bg, var(--bg-elev));
  border: 1px solid var(--tint-line, var(--line));
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.tinted-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--accent, var(--brand)); }

/* ===== 淡彩 Tint 底色系统（v20260208）===== */
.theme-blue   { --tint-bg:#EDF3FF; --tint-bg-hover:#E1EDFF; --tint-line:rgba(0,102,255,0.16);  --tint-glow:rgba(0,102,255,0.16); }
.theme-mint   { --tint-bg:#E7F7F1; --tint-bg-hover:#DBF2E8; --tint-line:rgba(16,185,129,0.18); --tint-glow:rgba(16,185,129,0.16); }
.theme-green  { --tint-bg:#E9F8EE; --tint-bg-hover:#DDF3E6; --tint-line:rgba(16,185,129,0.18); --tint-glow:rgba(16,185,129,0.16); }
.theme-purple { --tint-bg:#F2ECFF; --tint-bg-hover:#EAE1FF; --tint-line:rgba(124,58,237,0.16); --tint-glow:rgba(124,58,237,0.15); }
.theme-orange { --tint-bg:#FFF2E8; --tint-bg-hover:#FFE9DA; --tint-line:rgba(249,115,22,0.18); --tint-glow:rgba(249,115,22,0.16); }
.theme-amber  { --tint-bg:#FFF8E1; --tint-bg-hover:#FFF1CE; --tint-line:rgba(245,158,11,0.20); --tint-glow:rgba(245,158,11,0.17); }
.theme-rose   { --tint-bg:#FFF0EC; --tint-bg-hover:#FFE5DE; --tint-line:rgba(220,38,38,0.15);  --tint-glow:rgba(220,38,38,0.14); }
.theme-pink   { --tint-bg:#FDEFF6; --tint-bg-hover:#FCE4EF; --tint-line:rgba(236,72,153,0.16); --tint-glow:rgba(236,72,153,0.15); }
.theme-gray   { --tint-bg:#F1F3F6; --tint-bg-hover:#E9EDF1; --tint-line:rgba(15,23,42,0.10);   --tint-glow:rgba(15,23,42,0.06); }

.tinted-card:hover {
  transform: translateY(-4px);
  background: var(--tint-bg-hover, var(--tint-bg, #FFF));
  box-shadow: 0 18px 44px var(--tint-glow, rgba(15,23,42,0.10)), inset 0 1px 0 rgba(255,255,255,0.65);
  border-color: var(--accent, var(--brand));
}
.tinted-card .tc-eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent, var(--brand)); margin-bottom: 6px; }
.tinted-card .tc-title { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 4px; }
.tinted-card .tc-cn { font-size: 14px; font-weight: 500; color: var(--text-2); margin: 0 0 12px; }
.tinted-card .tc-body { font-size: 15px; line-height: 1.55; color: var(--text-2); }
.tinted-card .tc-list { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.tinted-card .tc-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--text); }
.tinted-card .tc-list .dot { width: 6px; height: 6px; background: var(--accent, var(--brand)); border-radius: 50%; margin-top: 8px; flex-shrink: 0; }

/* tinted-card 4 板块数据卡（vocabulary 等） */
.tinted-card .stat-eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent, var(--brand)); margin-bottom: 10px; }
.tinted-card .stat-big { font-size: 44px; font-weight: 800; color: var(--accent, var(--brand)); line-height: 1; margin: 0 0 12px; font-family: 'Inter', 'JetBrains Mono', monospace; letter-spacing: -0.03em; }
.tinted-card .stat-label { font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 12px; letter-spacing: -0.01em; }
.tinted-card .stat-desc { font-size: 14px; color: var(--text-2); line-height: 1.55; margin: 0 0 18px; }
.tinted-card .stat-list { display: flex; flex-direction: column; gap: 8px; padding-top: 16px; border-top: 1px solid rgba(0,0,0,0.06); }
.tinted-card .stat-list li { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); }
.tinted-card .stat-list .dot { width: 4px; height: 4px; background: var(--accent, var(--brand)); border-radius: 50%; flex-shrink: 0; }

/* tinted 主题色 */
.tinted-card.theme-mint { --accent: #0E7490; }
.tinted-card.theme-blue { --accent: #0040CC; }
.tinted-card.theme-purple { --accent: #6D28D9; }
.tinted-card.theme-orange { --accent: #C2410C; }
.tinted-card.theme-amber { --accent: #B45309; }
.tinted-card.theme-rose { --accent: #B91C1C; }
.tinted-card.theme-green { --accent: #047857; }
.tinted-card.theme-pink { --accent: #BE185D; }

/* 5. exam-grid — 9 大考试 3x3 网格 */
.exam-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 720px) { .exam-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .exam-grid { grid-template-columns: 1fr; } }
.exam-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.exam-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent, var(--brand)); }
.exam-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent, var(--brand)); }
.exam-card-icon { width: 48px; height: 48px; border-radius: 14px; margin: 0 auto 14px; display: inline-flex; align-items: center; justify-content: center; background: var(--accent-soft, rgba(0, 102, 255, 0.10)); color: var(--accent, var(--brand)); }
.exam-card-name { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.exam-card-sub { font-size: 13px; color: var(--text-2); }
.exam-card-num { font-size: 12px; font-weight: 600; color: var(--accent, var(--brand)); margin-top: 8px; }

.exam-card.theme-orange { --accent: #C2410C; --accent-soft: rgba(249, 115, 22, 0.10); }
.exam-card.theme-blue { --accent: #0040CC; --accent-soft: rgba(0, 102, 255, 0.10); }
.exam-card.theme-green { --accent: #047857; --accent-soft: rgba(16, 185, 129, 0.10); }
.exam-card.theme-purple { --accent: #6D28D9; --accent-soft: rgba(124, 58, 237, 0.10); }

/* 6. shop-grid — 积分商城 4 列 grid */
.shop-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 960px) { .shop-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .shop-grid { grid-template-columns: 1fr; } }
.shop-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.shop-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent, var(--brand)); }
.shop-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent, var(--brand)); }
.shop-card-icon { width: 64px; height: 64px; border-radius: 18px; margin: 0 auto 16px; display: inline-flex; align-items: center; justify-content: center; background: var(--accent-soft, rgba(0, 102, 255, 0.10)); color: var(--accent, var(--brand)); font-size: 28px; }
.shop-card-name { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.shop-card-sub { font-size: 13px; color: var(--text-2); margin-bottom: 14px; }
.shop-card-price { display: inline-flex; align-items: baseline; gap: 4px; padding: 6px 14px; border-radius: 980px; background: var(--accent-soft, rgba(0, 102, 255, 0.10)); color: var(--accent, var(--brand)); font-weight: 700; font-size: 14px; }
.shop-card-price .unit { font-size: 12px; font-weight: 500; }

.shop-card.theme-orange { --accent: #C2410C; --accent-soft: rgba(249, 115, 22, 0.10); }
.shop-card.theme-purple { --accent: #6D28D9; --accent-soft: rgba(124, 58, 237, 0.10); }
.shop-card.theme-green { --accent: #047857; --accent-soft: rgba(16, 185, 129, 0.10); }
.shop-card.theme-blue { --accent: #0040CC; --accent-soft: rgba(0, 102, 255, 0.10); }
.shop-card.theme-rose { --accent: #BE185D; --accent-soft: rgba(219, 39, 119, 0.10); }
.shop-card.theme-amber { --accent: #B45309; --accent-soft: rgba(217, 119, 6, 0.10); }
.shop-card.theme-cyan { --accent: #155E75; --accent-soft: rgba(14, 116, 144, 0.10); }
.shop-card.theme-pink { --accent: #BE185D; --accent-soft: rgba(236, 72, 153, 0.10); }

/* shop-icon 彩色图标容器 (HTML 用了 .shop-icon) */
.shop-icon { width: 64px; height: 64px; border-radius: 18px; margin: 0 auto 16px; display: inline-flex; align-items: center; justify-content: center; }
.shop-icon.theme-orange { background: rgba(249, 115, 22, 0.12); }
.shop-icon.theme-purple { background: rgba(124, 58, 237, 0.12); }
.shop-icon.theme-green  { background: rgba(16, 185, 129, 0.12); }
.shop-icon.theme-blue   { background: rgba(0, 102, 255, 0.12); }
.shop-icon.theme-rose   { background: rgba(219, 39, 119, 0.12); }
.shop-icon.theme-amber  { background: rgba(217, 119, 6, 0.12); }
.shop-icon.theme-cyan   { background: rgba(14, 116, 144, 0.12); }
.shop-icon.theme-pink   { background: rgba(236, 72, 153, 0.12); }

/* 7. strategy-list — 学习策略列表（彩色图标 + 文字） */
.strategy-list { display: flex; flex-direction: column; gap: 14px; }
.strategy-item { display: flex; align-items: flex-start; gap: 14px; padding: 16px 18px; border-radius: var(--radius-sm); background: rgba(15, 23, 42, 0.02); border: 1px solid var(--line); }
.strategy-item .strategy-icon { width: 36px; height: 36px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.strategy-item .strategy-text { flex: 1; }
.strategy-item .strategy-title { font-size: 15px; font-weight: 600; margin-bottom: 2px; }
.strategy-item .strategy-desc { font-size: 13px; color: var(--text-2); line-height: 1.5; }
.strategy-item.theme-orange .strategy-icon { background: rgba(249, 115, 22, 0.10); color: #C2410C; }
.strategy-item.theme-orange .strategy-title { color: #C2410C; }
.strategy-item.theme-blue .strategy-icon { background: rgba(0, 102, 255, 0.10); color: #0040CC; }
.strategy-item.theme-blue .strategy-title { color: #0040CC; }
.strategy-item.theme-green .strategy-icon { background: rgba(16, 185, 129, 0.10); color: #047857; }
.strategy-item.theme-green .strategy-title { color: #047857; }
.strategy-item.theme-purple .strategy-icon { background: rgba(124, 58, 237, 0.10); color: #6D28D9; }
.strategy-item.theme-purple .strategy-title { color: #6D28D9; }

/* 8. radar-svg — 能力雷达图容器 */
.radar-wrap { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.radar-svg { width: 100%; max-width: 480px; height: auto; }
.radar-legend { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px 24px; width: 100%; max-width: 480px; }
.radar-legend-item { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.radar-legend-dot { width: 10px; height: 10px; border-radius: 3px; flex-shrink: 0; }

/* 9. curve-svg — 遗忘曲线图容器 */
.curve-wrap { display: flex; flex-direction: column; align-items: stretch; gap: 20px; }
.curve-svg { width: 100%; height: auto; }
.curve-legend { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.curve-legend-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); }
.curve-legend-dot { width: 12px; height: 3px; border-radius: 2px; }

/* 10. step-card — 4 步骤卡片（PACE / GPS 用，浅色底） */
.step-grid { display: grid; gap: 20px; }
.step-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.step-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .step-grid.cols-4 { grid-template-columns: repeat(2, 1fr); } .step-grid.cols-3 { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .step-grid.cols-4 { grid-template-columns: 1fr; } }
.step-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.step-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--accent, var(--brand)); }
.step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.step-card .step-letter { font-size: 48px; font-weight: 800; letter-spacing: -0.04em; color: var(--accent, var(--brand)); line-height: 1; margin-bottom: 8px; font-family: 'JetBrains Mono', monospace; }
.step-card .step-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.step-card .step-body { font-size: 14px; line-height: 1.55; color: var(--text-2); }

.step-card.theme-blue { --accent: #0040CC; background: #FFFFFF; }
.step-card.theme-orange { --accent: #C2410C; background: #FFFFFF; }
.step-card.theme-green { --accent: #047857; background: #FFFFFF; }
.step-card.theme-purple { --accent: #6D28D9; background: #FFFFFF; }
.step-card.theme-rose { --accent: #B91C1C; background: #FFFFFF; }
.step-card.theme-amber { --accent: #B45309; background: #FFFFFF; }
.step-card.theme-mint { --accent: #0E7490; background: #FFFFFF; }

/* 11. arrow-flow — 步骤间连接箭头 */
.arrow-flow {
  display: flex; align-items: center; justify-content: center; gap: 4px;
  margin: 16px 0;
}
.arrow-flow svg { width: 20px; height: 20px; color: var(--text-3); }

/* 12. rating-bar-improved — 评级条（带颜色） */
.rating-bar-new { display: flex; flex-direction: column; gap: 20px; }
.rating-row-new { display: grid; grid-template-columns: 140px 1fr 70px; gap: 16px; align-items: center; }
.rating-label-new { font-size: 14px; font-weight: 600; }
.rating-track-new { height: 18px; background: rgba(15, 23, 42, 0.06); border-radius: 6px; overflow: hidden; position: relative; }
.rating-fill-new { height: 100%; border-radius: 6px; transition: width 1.2s var(--ease); }
.rating-fill-new.fill-orange { background: linear-gradient(90deg, #FDBA74 0%, #F97316 100%); }
.rating-fill-new.fill-blue { background: linear-gradient(90deg, #93C5FD 0%, #0066FF 100%); }
.rating-fill-new.fill-pink { background: linear-gradient(90deg, #FBCFE8 0%, #EC4899 100%); }
.rating-pct-new { font-size: 15px; font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }

/* 13. legal-doc — 法律文档样式 */
.legal-doc { background: var(--bg-elev); border-radius: var(--radius-lg); padding: 48px 56px; max-width: 880px; margin: 0 auto; border: 1px solid var(--line); }
.legal-doc h1 { font-size: 32px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.legal-doc h2 { font-size: 22px; font-weight: 700; margin: 36px 0 16px; color: var(--text); }
.legal-doc h3 { font-size: 17px; font-weight: 600; margin: 24px 0 10px; color: var(--text); }
.legal-doc p { font-size: 15px; line-height: 1.7; color: var(--text); margin-bottom: 14px; }
.legal-doc ul { margin: 12px 0 18px 24px; }
.legal-doc ul li { font-size: 15px; line-height: 1.7; color: var(--text); margin-bottom: 6px; list-style: disc; }
.legal-doc .legal-meta { color: var(--text-3); font-size: 14px; margin-bottom: 32px; }
.legal-toc { background: rgba(15, 23, 42, 0.03); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 28px; margin: 24px 0 32px; }
.legal-toc h4 { font-size: 14px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.legal-toc ol { margin-left: 20px; }
.legal-toc ol li { font-size: 14px; line-height: 1.8; color: var(--text-2); }
.legal-toc ol li a { color: var(--brand); }
@media (max-width: 680px) { .legal-doc { padding: 28px 20px; } .legal-doc h1 { font-size: 24px; } }

/* 14. bignum-card — 大数字展示卡片（首页/资源库） */
.bignum-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.bignum-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.bignum-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent, var(--brand)); }
.bignum-card .bignum-value { font-size: clamp(40px, 5vw, 64px); font-weight: 800; letter-spacing: -0.04em; line-height: 1; color: var(--accent, var(--brand)); font-variant-numeric: tabular-nums; }
.bignum-card .bignum-unit { font-size: 18px; font-weight: 600; color: var(--text-2); margin-left: 4px; }
.bignum-card .bignum-label { font-size: 14px; color: var(--text); font-weight: 500; margin-top: 12px; }
.bignum-card .bignum-sub { font-size: 12px; color: var(--text-3); margin-top: 4px; }

.bignum-card.theme-orange { --accent: #C2410C; }
.bignum-card.theme-blue { --accent: #0040CC; }
.bignum-card.theme-green { --accent: #047857; }
.bignum-card.theme-purple { --accent: #6D28D9; }
.bignum-card.theme-rose { --accent: #B91C1C; }
.bignum-card.theme-amber { --accent: #B45309; }
.bignum-card.theme-mint { --accent: #0E7490; }

/* ===== 15. white-text-fix — 强制深色文字（永远避免白字） ===== */
/* 凡是带 colored bg 的元素，子文字强制深色 */
[style*="color: #FFF"], [style*="color: #fff"], [style*="color:white"], [style*="color: white"] {
  color: #0F172A !important;
  text-shadow: none !important;
}

/* 给有 colored bg 的元素自动加深色文字 */
.bg-colored, .tinted-card, .step-card, .exam-card, .shop-card, .bignum-card, .stat-card, .feature-card-color { color: var(--text); }
.bg-colored h1, .bg-colored h2, .bg-colored h3, .tinted-card h1, .tinted-card h2, .tinted-card h3, .step-card h1, .step-card h2, .step-card h3 { color: var(--text); }

/* ===== 16. mini-tinted — 小型彩色 chip-like 块（用于循环、节点） ===== */
.mini-tinted {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 980px;
  font-size: 13px; font-weight: 600;
  border: 1px solid var(--line);
}
.mini-tinted .mini-icon { width: 24px; height: 24px; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.mini-tinted.theme-orange { background: transparent; color: #C2410C; }
.mini-tinted.theme-orange .mini-icon { background: rgba(249, 115, 22, 0.10); color: #C2410C; }
.mini-tinted.theme-blue { background: transparent; color: #0040CC; }
.mini-tinted.theme-blue .mini-icon { background: rgba(0, 102, 255, 0.10); color: #0040CC; }
.mini-tinted.theme-green { background: transparent; color: #047857; }
.mini-tinted.theme-green .mini-icon { background: rgba(16, 185, 129, 0.10); color: #047857; }
.mini-tinted.theme-purple { background: transparent; color: #6D28D9; }
.mini-tinted.theme-purple .mini-icon { background: rgba(124, 58, 237, 0.10); color: #6D28D9; }
.mini-tinted.theme-amber { background: transparent; color: #B45309; }
.mini-tinted.theme-amber .mini-icon { background: rgba(245, 158, 11, 0.10); color: #B45309; }
.mini-tinted.theme-rose { background: transparent; color: #B91C1C; }
.mini-tinted.theme-rose .mini-icon { background: rgba(220, 38, 38, 0.10); color: #B91C1C; }

/* ===== 17. legal-simple — 简化法律页 hero ===== */
.legal-hero { padding: 140px 0 40px; text-align: center; }
.legal-hero h1 { font-size: clamp(32px, 4.5vw, 48px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 12px; }
.legal-hero .legal-meta { font-size: 14px; color: var(--text-3); }
.legal-section { padding: 60px 0; }

/* ===== 18. cta-card — 行动召唤卡 ===== */
.cta-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 80px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center top, rgba(0, 102, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
}
.cta-card h2 { font-size: clamp(28px, 3.5vw, 44px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 16px; position: relative; }
.cta-card p { font-size: 17px; color: var(--text-2); margin-bottom: 32px; position: relative; }
.cta-card .btn { position: relative; }
@media (max-width: 680px) { .cta-card { padding: 48px 24px; } }

/* ===== 19. list-dotted — 圆点列表（用 ::before 替代 emoji） ===== */
.list-dotted { display: flex; flex-direction: column; gap: 12px; }
.list-dotted li { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; color: var(--text); line-height: 1.6; }
.list-dotted li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent, var(--brand)); margin-top: 9px; flex-shrink: 0; }

/* ===== 20. enhanced-color-bar — 增强的色条块（首页 4 引擎） ===== */
.enhanced-color-bar {
  position: relative;
  padding: 32px 28px 28px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.enhanced-color-bar::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--accent, var(--brand));
  transition: height 0.3s var(--ease);
}
.enhanced-color-bar:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.enhanced-color-bar:hover::before { height: 6px; }
.enhanced-color-bar .ecb-head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.enhanced-color-bar .ecb-body { font-size: 14px; line-height: 1.6; color: var(--text-2); }
.enhanced-color-bar .ecb-list { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.enhanced-color-bar .ecb-list li { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; color: var(--text); }
.enhanced-color-bar .ecb-list .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent, var(--brand)); margin-top: 8px; flex-shrink: 0; }

.enhanced-color-bar.theme-mint { --accent: #0E7490; }
.enhanced-color-bar.theme-blue { --accent: #0040CC; }
.enhanced-color-bar.theme-purple { --accent: #6D28D9; }
.enhanced-color-bar.theme-orange { --accent: #C2410C; }
.enhanced-color-bar.theme-rose { --accent: #B91C1C; }
.enhanced-color-bar.theme-amber { --accent: #B45309; }
.enhanced-color-bar.theme-green { --accent: #047857; }

/* ===== 21. flow-row — 水平流程（步骤+箭头一行） ===== */
.flow-row { display: flex; align-items: stretch; gap: 12px; }
.flow-row .flow-step { flex: 1; }
.flow-row .flow-arrow { display: flex; align-items: center; justify-content: center; color: var(--text-3); padding: 0 4px; }
.flow-row .flow-arrow svg { width: 24px; height: 24px; }
@media (max-width: 720px) { .flow-row { flex-direction: column; } .flow-row .flow-arrow svg { transform: rotate(90deg); } }

/* ===== 22. cap-6-grid — 6 能力评估 grid（雷达图配套） ===== */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 560px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } }
.cap-item { background: rgba(15, 23, 42, 0.03); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; display: flex; align-items: center; gap: 10px; }
.cap-item .cap-name { font-size: 14px; color: var(--text-2); flex: 1; }
.cap-item .cap-val { font-size: 18px; font-weight: 800; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.cap-item.theme-mint .cap-val { color: #0E7490; }
.cap-item.theme-blue .cap-val { color: #0040CC; }
.cap-item.theme-purple .cap-val { color: #6D28D9; }
.cap-item.theme-orange .cap-val { color: #C2410C; }
.cap-item.theme-green .cap-val { color: #047857; }
.cap-item.theme-rose .cap-val { color: #B91C1C; }

/* ===== 23. nogrid-2 — 2 列简单 grid（用于 GPS / PACE 关系展示） ===== */
.nogrid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
@media (max-width: 960px) { .nogrid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 680px) { .nogrid { grid-template-columns: 1fr; } }

/* ===== 30. PACE / GPS 步流程（4 步 / 3 步通用） =====
   - 默认：4 步 4 列（卡 + 箭头 + 卡 + 箭头 + 卡 + 箭头 + 卡）
   - .pace-grid-3：3 步 3 列（卡 + 箭头 + 卡 + 箭头 + 卡）
   - ≤980px：2 列布局，箭头隐藏
   - ≤680px：1 列布局，箭头隐藏（手机端）
*/
.pace-grid { display: grid; grid-template-columns: 1fr 60px 1fr 60px 1fr 60px 1fr; gap: 16px; align-items: stretch; }
.pace-grid-3 { grid-template-columns: 1fr 60px 1fr 60px 1fr; }
@media (max-width: 980px) {
  .pace-grid,
  .pace-grid-3 { grid-template-columns: 1fr 1fr; }
  .pace-grid .pace-arrow { display: none; }
}
@media (max-width: 680px) {
  .pace-grid,
  .pace-grid-3 { grid-template-columns: 1fr; }
  .pace-grid .pace-arrow { display: none; }
}

.pace-card {
  background: var(--tint-bg, #FFF); border: 1px solid var(--tint-line, var(--line)); border-radius: var(--radius-lg);
  padding: 32px 28px; position: relative; overflow: hidden;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  display: flex; flex-direction: column;
}
.pace-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--accent, var(--brand)); }
.pace-card:hover {
  transform: translateY(-4px);
  background: var(--tint-bg-hover, var(--tint-bg, #FFF));
  box-shadow: 0 18px 44px var(--tint-glow, rgba(15,23,42,0.10)), inset 0 1px 0 rgba(255,255,255,0.65);
}
/* Big Letter — 拍题豆大字标识（参考 PACE P/A/C/E） */
.big-letter {
  font-family: 'Inter', 'PingFang SC', sans-serif;
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.05em;
  margin-bottom: 14px;
  display: block;
}
.tinted-card .big-letter { margin-bottom: 18px; }
.tinted-card.compact .big-letter { margin-bottom: 12px; }

@media (max-width: 680px) {
  .big-letter { font-size: 48px; }
}

/* 拍题豆卡片：白底 + 主题色顶条（参考 PACE pace-card） */
.pd-card {
  background: #FFF;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 20px;
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(0,0,0,0.04);
  transition: transform 250ms ease, box-shadow 250ms ease;
}
.pd-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--accent, var(--brand));
}
.pd-card .pd-letter {
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--accent, var(--brand));
  margin-bottom: 10px;
  display: block;
}
.pd-card .pd-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-3, #86868B);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.pd-card .pd-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text, #1D1D1F);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.pd-card .pd-body {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-2, #6E6E73);
  margin-bottom: 16px;
}
.pd-card .pd-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 6px;
}
.pd-card .pd-list li {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text, #1D1D1F);
}
.pd-card .pd-list .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent, var(--brand));
  flex-shrink: 0;
}
.pd-card.theme-blue   { --accent: #0040CC; }
.pd-card.theme-purple { --accent: #6D28D9; }
.pd-card.theme-amber  { --accent: #B45309; }
.pd-card.theme-orange { --accent: #C2410C; }
.pd-card.theme-green  { --accent: #047857; }
.pd-card.theme-rose   { --accent: #B91C1C; }
.pd-card.theme-gray   { --accent: #86868B; }
.pd-card.theme-mint   { --accent: #0F766E; }

.pd-card.compact { padding: 24px 22px; }
.pd-card.compact .pd-letter { font-size: 40px; margin-bottom: 8px; }
.pd-card.compact .pd-title { font-size: 18px; }
.pd-card.compact .pd-body { font-size: 13px; line-height: 1.5; margin-bottom: 10px; }
.pd-card.compact .pd-list { gap: 4px; }
.pd-card.compact .pd-list li { font-size: 12px; }

@media (max-width: 680px) {
  .pd-card { padding: 28px 24px; }
  .pd-card .pd-letter { font-size: 40px; }
  .pd-card .pd-title { font-size: 18px; }
}

.pace-card .pace-letter {
  font-size: 48px; font-weight: 800; line-height: 1; letter-spacing: -0.04em;
  color: var(--accent, var(--brand)); margin-bottom: 8px;
  font-family: 'Inter', sans-serif;
}
.pace-card .pace-num { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; color: var(--text-3); margin-bottom: 4px; }
.pace-card .pace-title { font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 4px; letter-spacing: -0.01em; }
.pace-card .pace-en { font-size: 12px; font-weight: 600; letter-spacing: 0.08em; color: var(--accent, var(--brand)); margin-bottom: 16px; }
.pace-card .pace-body { font-size: 14px; line-height: 1.6; color: var(--text-2); margin-bottom: 20px; }
.pace-card .pace-list { display: flex; flex-direction: column; gap: 8px; }
.pace-card .pace-list li { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text); }
.pace-card .pace-list .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent, var(--brand)); flex-shrink: 0; }

.pace-arrow { display: flex; align-items: center; justify-content: center; }

.pace-card.theme-blue { --accent: #0040CC; }
.pace-card.theme-orange { --accent: #C2410C; }
.pace-card.theme-green { --accent: #047857; }
.pace-card.theme-purple { --accent: #6D28D9; }
.pace-card.theme-rose { --accent: #B91C1C; }
.pace-card.theme-amber { --accent: #B45309; }
.pace-card.theme-mint { --accent: #0F766E; }
.pace-card.theme-gray { --accent: #86868B; }

/* ===== 31. data-compare 数据对比 ===== */
.data-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 720px) { .data-compare { grid-template-columns: 1fr; } }
.dc-col { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px 28px; position: relative; overflow: hidden; }
.dc-col.dc-old { border-color: rgba(220,38,38,0.18); }
.dc-col.dc-new { border-color: rgba(16,185,129,0.22); }
.dc-col .dc-label { font-size: 13px; font-weight: 700; letter-spacing: 0.08em; color: var(--text-3); margin-bottom: 18px; text-transform: uppercase; }
.dc-col .dc-desc { font-size: 13.5px; line-height: 1.6; color: var(--text-2); margin-top: 18px; }
.dc-col .dc-trend { display: inline-block; margin-left: 4px; color: #047857; font-weight: 800; font-size: 16px; }

/* 7 天柱状图 */
.dc-bars {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  align-items: end;
  gap: 8px;
  height: 200px;
  padding: 16px 8px 8px;
  border-bottom: 2px solid rgba(15,23,42,0.08);
  margin-bottom: 12px;
}
.dc-bar {
  position: relative;
  height: var(--h, 50%);
  background: rgba(15,23,42,0.1);
  border-radius: 6px 6px 0 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 4px;
  transition: all 0.3s ease;
  animation: barRise 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.dc-bar:nth-child(1) { animation-delay: 0.0s; }
.dc-bar:nth-child(2) { animation-delay: 0.05s; }
.dc-bar:nth-child(3) { animation-delay: 0.1s; }
.dc-bar:nth-child(4) { animation-delay: 0.15s; }
.dc-bar:nth-child(5) { animation-delay: 0.2s; }
.dc-bar:nth-child(6) { animation-delay: 0.25s; }
.dc-bar:nth-child(7) { animation-delay: 0.3s; }
.dc-col.dc-old .dc-bar { background: linear-gradient(180deg, #FFA8A8, #DC2626); }
.dc-col.dc-new .dc-bar { background: linear-gradient(180deg, #6EE7B7, #10B981); }
.dc-bar .dc-dn { position: absolute; bottom: -22px; left: 50%; transform: translateX(-50%); font-size: 11px; font-weight: 700; color: var(--text-3); }
.dc-bar .dc-dv { font-size: 11px; font-weight: 800; color: #FFFFFF; margin-bottom: 4px; opacity: 0.95; }
@keyframes barRise {
  from { height: 0 !important; opacity: 0.4; }
  to { opacity: 1; }
}

/* ===== 32. radar 雷达图 ===== */
.radar-container { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px; }
.radar-svg { width: 100%; height: auto; display: block; }

/* ===== 33. ability-list 6 维能力列表 ===== */
.ability-list { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; display: flex; flex-direction: column; gap: 16px; }
.ability-row .ab-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.ability-row .ab-name { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--text); }
.ability-row .ab-dot { width: 10px; height: 10px; border-radius: 50%; }
.ability-row .ab-num { font-size: 16px; font-weight: 800; color: var(--text); }
.ability-row .ab-bar { height: 8px; background: rgba(15,23,42,0.05); border-radius: 999px; overflow: hidden; margin-bottom: 4px; }
.ability-row .ab-fill { height: 100%; border-radius: 999px; }
.ability-row .ab-comment { font-size: 12px; color: var(--text-3); margin-top: 2px; }

/* ===== 34. forget-compare 遗忘曲线对比 ===== */
.forget-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 720px) { .forget-compare { grid-template-columns: 1fr; } }
.fc-col { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px; }
.fc-col .fc-head { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 16px; }
.fc-col .fc-svg { width: 100%; height: auto; display: block; margin-bottom: 16px; }
.fc-col .fc-num { font-size: 14px; color: var(--text-2); }
.fc-col .fc-num .mono { font-size: 28px; font-weight: 800; color: inherit; margin: 0 4px; }

/* ===== 35. strategy-tag 策略标签 ===== */
.strategy-tag { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; margin-bottom: 12px; }
.strategy-action { margin-top: 16px; padding-top: 16px; border-top: 1px dashed rgba(15,23,42,0.1); }
.strategy-action .sa-label { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; color: var(--text-3); margin-bottom: 6px; }
.strategy-action p { font-size: 14px; line-height: 1.6; color: var(--text); }
.strategy-cta { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; padding: 8px 16px; border-radius: 999px; background: var(--text); color: #fff; font-size: 13px; font-weight: 600; border: 1px solid var(--text); transition: background 0.25s ease-out, transform 0.25s ease-out; cursor: pointer; }
.strategy-cta:hover { background: #000; transform: translateY(-1px); }
.strategy-cta::after { content: "→"; font-size: 14px; }

/* ===== 36. demo 评分示例 ===== */
.demo-block { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 36px 32px; }
.demo-line { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px dashed rgba(15,23,42,0.08); }
.demo-line:last-of-type { border-bottom: none; }
.demo-line .demo-label { flex-shrink: 0; min-width: 48px; padding: 4px 10px; border-radius: 6px; background: rgba(15,23,42,0.06); color: var(--text-2); font-size: 12px; font-weight: 700; text-align: center; }
.demo-line .demo-text { font-size: 18px; line-height: 1.6; color: var(--text); }
.demo-line .demo-text em { font-style: normal; padding: 1px 4px; border-radius: 4px; }
.demo-feedback { margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(15,23,42,0.08); }
.demo-feedback .df-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.demo-feedback .df-tag { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 8px; font-size: 13px; }
.demo-feedback .df-tag b { font-weight: 700; }
.demo-feedback .df-scores { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 600px) { .demo-feedback .df-scores { grid-template-columns: repeat(2, 1fr); } }
.demo-feedback .df-score { background: rgba(15,23,42,0.03); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; display: flex; flex-direction: column; gap: 4px; }
.demo-feedback .df-score span { font-size: 12px; color: var(--text-3); }
.demo-feedback .df-score b { font-size: 22px; font-weight: 800; color: var(--text); }
.demo-feedback .df-expl { display: flex; flex-direction: column; gap: 16px; margin-top: 20px; }
.demo-feedback .df-rule { padding: 16px; background: rgba(15,23,42,0.03); border-radius: 12px; }
.demo-feedback .df-rule p { font-size: 14px; line-height: 1.7; color: var(--text); margin: 0; }
.demo-feedback .df-rule p b { color: var(--brand); font-weight: 700; }

/* ===== 37. legal 法律页 ===== */
.legal-hero { padding: 96px 0 48px; text-align: center; }
.legal-hero .legal-title { font-size: 56px; font-weight: 800; letter-spacing: -0.03em; color: var(--text); margin: 12px 0; }
.legal-hero .legal-meta { font-size: 14px; color: var(--text-3); }
@media (max-width: 600px) { .legal-hero .legal-title { font-size: 36px; } }

.legal-layout { padding: 48px 0 96px; }
.legal-layout .container { max-width: 760px; margin: 0 auto; padding: 0 24px; position: relative; }
.legal-layout .legal-body { max-width: 760px; width: 100%; }

/* 桌面端 (≥1100px)：目录 position: fixed 浮在右侧，不占文档流 */
@media (min-width: 1100px) {
  .legal-toc {
    position: fixed;
    top: 140px;
    right: max(24px, calc((100vw - 1200px) / 2 + 24px));
    width: 220px;
    max-height: calc(100vh - 180px);
    overflow-y: auto;
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    z-index: 10;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    scrollbar-width: thin;
  }
  .legal-toc::-webkit-scrollbar { width: 4px; }
  .legal-toc::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.1); border-radius: 2px; }
  .legal-toc .legal-toc-title { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; color: var(--text-3); padding: 0 8px 8px; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
  .legal-toc a { padding: 8px 10px; border-radius: 6px; font-size: 13px; color: var(--text-2); text-decoration: none; transition: background .2s ease; line-height: 1.4; word-break: break-word; }
  .legal-toc a:hover { background: rgba(0,102,255,0.08); color: var(--brand); }
}

/* 中等屏幕 (881-1099px)：目录改成顶部 sticky 横向滚动条 */
@media (max-width: 1099px) and (min-width: 881px) {
  .legal-toc {
    position: sticky;
    top: 80px;
    width: 100%;
    max-width: 100%;
    max-height: none;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--line);
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    z-index: 5;
  }
  .legal-toc .legal-toc-title { display: none; }
  .legal-toc a { white-space: nowrap; flex-shrink: 0; font-size: 12px; padding: 6px 12px; border-radius: 980px; background: rgba(15,23,42,0.04); color: var(--text-2); text-decoration: none; transition: all .2s ease; }
  .legal-toc a:hover { background: rgba(0,102,255,0.10); color: var(--brand); }
}

/* 移动端 (≤880px)：目录变成顶部可滚动小条 */
@media (max-width: 880px) {
  .legal-toc {
    position: static;
    width: 100%;
    max-width: 100%;
    flex-direction: row;
    overflow-x: auto;
    margin-bottom: 24px;
    padding: 12px 16px;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    display: flex;
    gap: 6px;
  }
  .legal-toc .legal-toc-title { display: none; }
  .legal-toc a { white-space: nowrap; flex-shrink: 0; font-size: 12px; padding: 6px 12px; border-radius: 980px; background: rgba(15,23,42,0.04); color: var(--text-2); text-decoration: none; transition: all .2s ease; }
  .legal-toc a:hover { background: rgba(0,102,255,0.10); color: var(--brand); }
}

.legal-body { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 48px 56px; max-width: 100%; }
@media (max-width: 600px) { .legal-body { padding: 32px 24px; } }
.legal-body .legal-lead { font-size: 16px; line-height: 1.8; color: var(--text); padding: 16px 20px; background: rgba(0,102,255,0.04); border-left: 3px solid var(--brand); border-radius: 6px; margin-bottom: 40px; }
.legal-body h2 { font-size: 22px; font-weight: 700; color: var(--text); margin: 40px 0 16px; padding-top: 24px; border-top: 1px solid var(--line); }
.legal-body h2:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.legal-body h3 { font-size: 16px; font-weight: 700; color: var(--text); margin: 24px 0 8px; }
.legal-body p { font-size: 15px; line-height: 1.85; color: var(--text-2); margin: 0 0 12px; }
.legal-body ul, .legal-body ol { padding-left: 24px; margin: 0 0 16px; }
.legal-body li { font-size: 15px; line-height: 1.85; color: var(--text-2); margin-bottom: 6px; }
.legal-body b { color: var(--text); font-weight: 700; }

/* ===== 38. link-arrow 链接箭头 ===== */
.link-arrow { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 600; color: var(--brand); margin-top: 16px; text-decoration: none; transition: gap .2s ease; }
.link-arrow:hover { gap: 8px; }

/* ===== 39. tc-list 列表（卡片内） ===== */
.tc-list { margin-top: 16px; padding-top: 16px; border-top: 1px dashed rgba(15,23,42,0.1); display: flex; flex-direction: column; gap: 8px; }
.tc-list li { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text); }
.tc-list .dot { width: 5px; height: 5px; border-radius: 50%; background: currentColor; flex-shrink: 0; opacity: 0.5; }
.tinted-card .tc-list .dot { background: var(--accent, var(--brand)); opacity: 1; }

.tc-num { margin-top: 16px; font-size: 36px; font-weight: 800; letter-spacing: -0.03em; line-height: 1; }

/* ===== 40. page-hero / tinted-  各种主题 ===== */
.page-hero { padding: 120px 0 80px; position: relative; }
.page-hero .display { font-size: 56px; font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; color: var(--text); margin: 12px 0 24px; }
@media (max-width: 720px) { .page-hero .display { font-size: 36px; } .page-hero { padding: 96px 0 56px; } }

.tinted-orange { background: transparent; }
.tinted-blue { background: transparent; }
.tinted-green { background: transparent; }
.tinted-purple { background: transparent; }
.tinted-mint { background: transparent; }
.tinted-rose { background: transparent; }

/* 主题色下的 hero-stat 数字：渐变填充（与学院页一致） */
.tinted-orange .hero-stat .num { background: linear-gradient(135deg, #C2410C 0%, #EA580C 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.tinted-blue .hero-stat .num { background: linear-gradient(135deg, #0040CC 0%, #1E40AF 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.tinted-green .hero-stat .num { background: linear-gradient(135deg, #047857 0%, #10B981 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.tinted-purple .hero-stat .num { background: linear-gradient(135deg, #6D28D9 0%, #8B5CF6 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.tinted-mint .hero-stat .num { background: linear-gradient(135deg, #0E7490 0%, #06B6D4 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.tinted-rose .hero-stat .num { background: linear-gradient(135deg, #B91C1C 0%, #DC2626 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* section-divider 灰色分割背景 */
.section.section-divider { border-top: 1px solid var(--line); }

/* cta-section 间距（纯色，无米色渐变） */
.cta-section { padding: 80px 0 120px; }

/* mini-tinted: 浅色装饰盒 */
.mini-tinted { padding: 16px 20px; border-radius: 14px; font-size: 14px; line-height: 1.6; }
.mini-tinted.theme-orange { background: transparent; color: #9A3412; }
.mini-tinted.theme-blue { background: #EFF6FF; color: #1E40AF; }
.mini-tinted.theme-green { background: #F0FDF4; color: #065F46; }
.mini-tinted.theme-purple { background: #FAF5FF; color: #5B21B6; }

/* 修复：grid-5 在 small screens */
@media (max-width: 980px) { .grid[style*="repeat(5"] { grid-template-columns: repeat(2, 1fr) !important; } }

/* ===== 41. vocabulary 9 大考试 ===== */
.exam-row { margin-top: 64px; }
.exam-row:first-of-type { margin-top: 0; }
.exam-row-head { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.exam-row-head .er-tag { padding: 6px 14px; border-radius: 999px; color: #FFF; font-size: 12px; font-weight: 700; letter-spacing: 0.05em; }
.exam-row-head .er-info h3 { font-size: 22px; font-weight: 700; color: var(--text); margin: 0 0 4px; letter-spacing: -0.01em; }
.exam-row-head .er-info p { font-size: 13px; color: var(--text-3); margin: 0; }

.exam-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 880px) { .exam-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .exam-grid { grid-template-columns: 1fr; } }

.exam-card { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px 24px; position: relative; overflow: hidden; transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.exam-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--accent, var(--brand)); }
.exam-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.exam-card.theme-orange { --accent: #C2410C; }
.exam-card.theme-blue { --accent: #0040CC; }
.exam-card.theme-green { --accent: #047857; }
.exam-card .ec-icon { width: 44px; height: 44px; border-radius: 12px; background: rgba(15,23,42,0.04); display: flex; align-items: center; justify-content: center; color: var(--accent, var(--brand)); margin-bottom: 16px; }
.exam-card .ec-icon .svg-icon { width: 24px; height: 24px; }
.exam-card .ec-level { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; color: var(--accent, var(--brand)); margin-bottom: 4px; }
.exam-card .ec-name { font-size: 20px; font-weight: 700; color: var(--text); margin: 0 0 4px; letter-spacing: -0.01em; }
.exam-card .ec-num { font-size: 18px; font-weight: 800; color: var(--text); margin-bottom: 8px; font-family: 'Inter', sans-serif; }
.exam-card .ec-desc { font-size: 13px; color: var(--text-2); line-height: 1.5; margin: 0; }

/* ===== 42. 4P 卡片小变体 ===== */
.four-p-card { display: flex; align-items: flex-start; gap: 16px; padding: 20px 24px; background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); }
.four-p-card .four-p-icon { width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.four-p-card .four-p-text h4 { font-size: 15px; font-weight: 700; color: var(--text); margin: 0 0 4px; }
.four-p-card .four-p-text p { font-size: 13px; line-height: 1.6; color: var(--text-2); margin: 0; }

/* ===== 43. 评分维度 (prn) ===== */
.dim-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 880px) { .dim-grid { grid-template-columns: repeat(2, 1fr); } }
.dim-card { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px 24px; text-align: center; position: relative; overflow: hidden; }
.dim-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--accent); }
.dim-card.theme-orange { --accent: #C2410C; }
.dim-card.theme-blue { --accent: #0040CC; }
.dim-card.theme-green { --accent: #047857; }
.dim-card.theme-purple { --accent: #6D28D9; }
.dim-card .dc-score { font-size: 56px; font-weight: 800; letter-spacing: -0.04em; line-height: 1; color: var(--accent); margin-bottom: 8px; font-family: 'Inter', sans-serif; }
.dim-card .dc-cap { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.dim-card .dc-desc { font-size: 12px; color: var(--text-2); line-height: 1.5; }

/* ===== 44. 商店商品 (game) ===== */
.shop-card { background: #FFF; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px 24px; text-align: center; position: relative; overflow: hidden; transition: transform .3s var(--ease), box-shadow .3s var(--ease); }
.shop-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--accent); }
.shop-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.shop-card.theme-orange { --accent: #C2410C; }
.shop-card.theme-purple { --accent: #6D28D9; }
.shop-card.theme-green { --accent: #047857; }
.shop-card.theme-blue { --accent: #0040CC; }
.shop-card .shop-icon { width: 56px; height: 56px; border-radius: 16px; background: rgba(15,23,42,0.04); display: flex; align-items: center; justify-content: center; color: var(--accent); margin: 0 auto 16px; }
.shop-card .shop-icon .svg-icon { width: 32px; height: 32px; }
.shop-card .shop-name { font-size: 16px; font-weight: 700; color: var(--text); margin: 0 0 8px; }
.shop-card .shop-hook { min-height: 42px; margin: 0 0 14px; line-height: 1.5; }
.shop-card .shop-count { font-size: 28px; font-weight: 800; color: var(--accent); margin: 0 0 4px; font-family: 'Inter', sans-serif; line-height: 1; }
.shop-card .shop-count .unit { font-size: 14px; font-weight: 500; color: var(--text-2); margin-left: 4px; font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; }
.shop-card .shop-price { font-size: 12px; font-weight: 500; color: var(--text-3); margin: 0; }
.shop-card .shop-price small { font-size: 12px; font-weight: 500; color: var(--text-3); margin-left: 4px; }
.shop-card .shop-desc { font-size: 12px; color: var(--text-3); }

/* ===== 45. 主页 hero 5 引擎小卡（新增首屏 5 个） ===== */
.hero-3col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 880px) { .hero-3col { grid-template-columns: 1fr; } }

/* ===== 46. progress 进度条（vocabulary / 等级条） ===== */
.level-track { height: 8px; background: rgba(15,23,42,0.06); border-radius: 999px; overflow: hidden; margin: 12px 0 8px; }
.level-fill { height: 100%; border-radius: 999px; }
.level-meta { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-3); font-weight: 600; }

/* ===== 47. ecb-list 数字评分行 ===== */
.ecb-list .ecb-row { display: flex; align-items: center; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.ecb-list .ecb-row:last-child { border-bottom: none; }
.ecb-list .ecb-row .er-name { flex: 1; font-size: 14px; color: var(--text); font-weight: 600; }
.ecb-list .ecb-row .er-bar { flex: 2; height: 8px; background: rgba(15,23,42,0.05); border-radius: 999px; overflow: hidden; }
.ecb-list .ecb-row .er-fill { height: 100%; border-radius: 999px; }
.ecb-list .ecb-row .er-pct { flex-shrink: 0; width: 80px; text-align: right; font-size: 16px; font-weight: 800; color: var(--text); font-family: 'Inter', sans-serif; }

/* ===== 48. dc 字典里的数据条 ===== */
.dc-tile { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: #FFF; border: 1px solid var(--line); border-radius: 12px; }
.dc-tile-num { font-size: 24px; font-weight: 800; letter-spacing: -0.02em; line-height: 1; min-width: 48px; }
.dc-tile-cap { font-size: 12px; color: var(--text-2); line-height: 1.4; }

/* ===== 49. 一些小工具 ===== */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0 !important; }
.mt-48 { margin-top: 48px; }
.mt-64 { margin-top: 64px; }

/* ===== 50. 响应式微调 ===== */
@media (max-width: 720px) {
  .display { font-size: 36px; }
  .page-hero .display { font-size: 36px !important; }
  .legal-hero .legal-title { font-size: 36px !important; }
  .exam-row-head { flex-direction: column; align-items: flex-start; gap: 12px; }
}

/* ===== cycle 循环图节点 ===== */
.cycle-node {
  position: absolute;
  width: 110px; height: 110px;
  background: #FFF; border: 1px solid var(--line); border-radius: 20px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 10px 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  z-index: 2;
}
.cycle-node:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.cycle-node.node-tl { top: 0; left: 0; }
.cycle-node.node-tr { top: 0; right: 0; }
.cycle-node.node-br { bottom: 0; right: 0; }
.cycle-node.node-bl { bottom: 0; left: 0; }
.cycle-node .cn-icon {
  width: 36px; height: 36px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(15,23,42,0.04); color: var(--brand, #0066FF);
  margin-bottom: 4px;
}
.cycle-node .cn-icon .svg-icon { width: 18px; height: 18px; }
.cycle-node .cn-num {
  font-family: 'Inter', sans-serif; font-size: 10px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--text-3); margin-bottom: 1px;
}
.cycle-node .cn-name { font-size: 14px; font-weight: 700; color: var(--text); }
.cycle-node .cn-desc { font-size: 11px; color: var(--text-3); margin-top: 2px; }

.cycle-center {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 88px; height: 88px; border-radius: 50%;
  background: #FFF; border: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  z-index: 3; box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}
.cycle-center .svg-icon { color: #7C3AED !important; }

/* 节点 4 个角配色（让循环图更清晰） */
.cycle-node.node-tl .cn-icon { background: rgba(234, 88, 12, 0.10); color: #C2410C; }
.cycle-node.node-tr .cn-icon { background: rgba(124, 58, 237, 0.10); color: #6D28D9; }
.cycle-node.node-br .cn-icon { background: rgba(0, 102, 255, 0.10); color: #0040CC; }
.cycle-node.node-bl .cn-icon { background: rgba(16, 185, 129, 0.10); color: #047857; }

/* ===== 51. loop-container 新循环图 ===== */
.loop-container { position: relative; width: 100%; max-width: 600px; margin: 0 auto; aspect-ratio: 1; }
.loop-svg { width: 100%; height: 100%; display: block; }
.loop-node {
  position: absolute;
  width: 120px; height: 120px;
  background: #FFF; border: 1px solid var(--line);
  border-radius: 16px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 12px 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  z-index: 2;
}
.loop-node:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 12px 32px rgba(0,0,0,0.12); }
.loop-node::before { content: ''; position: absolute; inset: 0; border-radius: 16px; background: var(--bg-elev, #FFFFFF); opacity: 0.5; z-index: -1; }
.loop-tl { top: 5%; left: 5%; }
.loop-tr { top: 5%; right: 5%; }
.loop-br { bottom: 5%; right: 5%; }
.loop-bl { bottom: 5%; left: 5%; }
.loop-node .ln-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--bg-elev, #FFFFFF);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 6px;
}
.loop-node .ln-num {
  font-family: 'Inter', sans-serif; font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; color: var(--accent, #0066FF); margin-bottom: 2px;
}
.loop-node .ln-name { font-size: 16px; font-weight: 800; color: #0F172A; letter-spacing: -0.01em; }
.loop-node .ln-desc { font-size: 11px; color: #475569; margin-top: 2px; }
@media (max-width: 720px) {
  .loop-container { max-width: 380px; }
  .loop-node { width: 84px; height: 84px; padding: 8px 4px; }
  .loop-node .ln-icon { width: 32px; height: 32px; }
  .loop-node .ln-name { font-size: 13px; }
  .loop-node .ln-desc { display: none; }
}

/* ============== Legal Contact Card ============== */
.legal-contact { margin-top: 18px; background: rgba(15, 23, 42, 0.025); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 0; overflow: hidden; }
.legal-contact-row { display: flex; align-items: center; padding: 14px 24px; border-bottom: 1px solid rgba(0,0,0,0.05); transition: background 200ms ease; }
.legal-contact-row:last-child { border-bottom: none; }
.legal-contact-row:hover { background: rgba(0, 0, 0, 0.02); }
.legal-contact-label { flex: 0 0 110px; font-size: 13px; font-weight: 600; color: var(--text-3); letter-spacing: 0.02em; }
.legal-contact-row > span:last-child { font-size: 14.5px; font-weight: 500; color: var(--text); font-variant-numeric: tabular-nums; }
@media (max-width: 680px) {
  .legal-contact-row { flex-direction: column; align-items: flex-start; gap: 4px; padding: 14px 18px; }
  .legal-contact-label { flex: none; }
}

/* ============== Word Demo Card (词典三维评分) ============== */
.word-demo-card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 48px 48px 40px;
  box-shadow: 0 8px 32px rgba(15, 23, 42, 0.06);
  max-width: 960px;
  margin: 0 auto;
}
.wd-head {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 24px; padding-bottom: 32px; border-bottom: 1px solid rgba(0,0,0,0.06);
  margin-bottom: 36px;
}
.wd-eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 0.14em; color: #86868B; text-transform: uppercase; }
.wd-word { font-size: 72px; font-weight: 800; letter-spacing: -0.03em; color: #0F172A; margin: 8px 0 6px; font-family: 'Inter', sans-serif; }
.wd-pron { font-size: 15px; color: #475569; font-weight: 500; }
.wd-pron .wd-pos { display: inline-block; margin-left: 12px; padding: 2px 8px; background: rgba(0, 102, 255, 0.1); color: #0066FF; border-radius: 6px; font-size: 12px; font-weight: 700; }
.wd-rec {
  flex: 0 0 auto; padding: 16px 22px; background: linear-gradient(135deg, rgba(16, 185, 129, 0.08), rgba(16, 185, 129, 0.02));
  border: 1px solid rgba(16, 185, 129, 0.2); border-radius: 16px;
  text-align: right; min-width: 180px;
}
.wd-rec-label { font-size: 11px; font-weight: 700; color: #047857; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 6px; }
.wd-rec-text { font-size: 15px; font-weight: 700; color: #065F46; line-height: 1.4; }

/* 大柱状图 */
.chart-bar {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  align-items: flex-end; padding: 0 8px; margin-bottom: 32px;
}
.chart-col { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.chart-num { font-size: 28px; font-weight: 800; color: #0F172A; letter-spacing: -0.02em; line-height: 1; font-variant-numeric: tabular-nums; }
.chart-track {
  width: 96px; height: 220px; background: rgba(15, 23, 42, 0.04);
  border-radius: 12px; position: relative; overflow: hidden;
  display: flex; align-items: flex-end;
}
.chart-fill {
  width: 100%; border-radius: 12px 12px 0 0; position: relative;
  box-shadow: inset 0 4px 0 rgba(255,255,255,0.25);
  animation: barGrow 1.2s cubic-bezier(0.22, 1, 0.36, 1) both;
  transition: filter .3s ease;
}
.chart-col:hover .chart-fill { filter: brightness(1.08); }
.chart-fill-tip {
  position: absolute; top: -28px; left: 50%; transform: translateX(-50%);
  background: #0F172A; color: #FFF; font-size: 11px; font-weight: 700;
  padding: 4px 8px; border-radius: 6px; font-variant-numeric: tabular-nums;
}
.chart-fill-tip::after { content: ''; position: absolute; bottom: -4px; left: 50%; transform: translateX(-50%); border: 4px solid transparent; border-top-color: #0F172A; }
.chart-tag { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 13px; font-weight: 700; margin-top: 4px; }
.chart-tag.tag-purple { background: rgba(124, 58, 237, 0.12); color: #6D28D9; }
.chart-tag.tag-blue   { background: rgba(0, 102, 255, 0.12); color: #0040CC; }
.chart-tag.tag-rose   { background: rgba(220, 38, 38, 0.12); color: #B91C1C; }
.chart-en { font-size: 11px; color: #86868B; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600; }

@keyframes barGrow {
  from { height: 0 !important; opacity: 0.4; }
  to { opacity: 1; }
}

.wd-conclusion {
  background: rgba(15, 23, 42, 0.04); border-radius: 14px;
  padding: 18px 22px; font-size: 14.5px; color: #1E293B; line-height: 1.6;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.wd-conclusion strong { color: #0F172A; font-weight: 800; }
.wd-trend { display: inline-flex; align-items: center; gap: 12px; font-size: 13px; color: #475569; font-weight: 600; }
.wd-trend-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; }

@media (max-width: 720px) {
  .word-demo-card { padding: 32px 24px; }
  .wd-head { flex-direction: column; gap: 18px; padding-bottom: 24px; margin-bottom: 24px; }
  .wd-word { font-size: 52px; }
  .wd-rec { text-align: left; min-width: 0; width: 100%; }
  .chart-track { width: 64px; height: 160px; }
  .chart-num { font-size: 22px; }
}

/* ========== 4 维度评分条 (声韵引擎) ========== */
.trend-bar {
  position: relative;
  width: 100%;
  height: 12px;
  background: rgba(15, 23, 42, 0.06);
  border-radius: 999px;
  overflow: visible;
  margin-top: 32px;
}
.trend-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  position: relative;
  animation: trendFill 1.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.trend-bar.trend-orange .trend-fill { background: linear-gradient(90deg, #EA580C, #FFA15C); }
.trend-bar.trend-blue   .trend-fill { background: linear-gradient(90deg, #0066FF, #66A3FF); }
.trend-bar.trend-green  .trend-fill { background: linear-gradient(90deg, #10B981, #6EE7B7); }
.trend-bar.trend-purple .trend-fill { background: linear-gradient(90deg, #7C3AED, #B59CFF); }
/* trend-tip 改为 trend-bar 内部右端的小徽章，覆盖在 trend-fill 末端
   不再浮出 trend-bar 上方，避免盖住上面文字（.tc-body） */
.trend-tip {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  font-size: 10px;
  font-weight: 700;
  color: #FFFFFF;
  background: rgba(15, 23, 42, 0.55);
  padding: 2px 8px;
  border-radius: 999px;
  box-shadow: none;
  white-space: nowrap;
  z-index: 2;
  letter-spacing: 0.02em;
  animation: trendTipIn 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.8s both;
}
.trend-bar.trend-orange .trend-tip { background: rgba(234, 88, 12, 0.85); }
.trend-bar.trend-blue   .trend-tip { background: rgba(0, 102, 255, 0.85); }
.trend-bar.trend-green  .trend-tip { background: rgba(16, 185, 129, 0.85); }
.trend-bar.trend-purple .trend-tip { background: rgba(124, 58, 237, 0.85); }
@keyframes trendFill {
  from { width: 0 !important; opacity: 0.4; }
  to { opacity: 1; }
}
@keyframes trendTipIn {
  from { opacity: 0; transform: translateY(calc(-50% + 4px)); }
  to   { opacity: 1; transform: translateY(-50%); }
}

/* ========== 阶梯式累计趋势图（替代具体数字） ========== */
.step-trend {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
  height: 56px;
  padding: 4px 6px 4px 6px;
}
.step-trend .st-bar {
  position: relative;
  width: 14px;
  height: var(--h, 50%);
  background: linear-gradient(180deg, #6EE7B7 0%, #10B981 100%);
  border-radius: 4px 4px 2px 2px;
  align-self: flex-end;
  animation: stepRise 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.step-trend .st-bar:nth-child(1) { animation-delay: 0s; --h: 30%; }
.step-trend .st-bar:nth-child(2) { animation-delay: 0.1s; --h: 48%; }
.step-trend .st-bar:nth-child(3) { animation-delay: 0.2s; --h: 68%; }
.step-trend .st-bar:nth-child(4) { animation-delay: 0.3s; --h: 92%; }
.step-trend .st-bar::after {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  transform: translateX(-50%);
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #047857;
  box-shadow: 0 0 0 3px #FFF, 0 0 0 4px rgba(4, 120, 87, 0.18);
}
/* 趋势折线叠加 */
.step-trend .st-line {
  position: absolute;
  left: 6px; right: 38px;
  bottom: 4px;
  height: 56px;
  pointer-events: none;
}
.step-trend .st-line svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}
/* 右上角斜向上箭头 */
.step-trend .st-arrow {
  position: absolute;
  top: 0; right: 0;
  width: 26px; height: 26px;
  background: linear-gradient(135deg, #10B981 0%, #047857 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}
.step-trend .st-arrow svg {
  width: 14px;
  height: 14px;
  color: #FFF;
  stroke-width: 2.5;
}
@keyframes stepRise {
  from { height: 0; opacity: 0.4; }
  to { opacity: 1; }
}

/* 横向阶梯（柱状图对比用） */
.step-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  align-items: end;
  height: 88px;
  padding: 8px 4px 0;
}
.step-row .st-step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
}
.step-row .st-step .st-box {
  width: 100%;
  height: var(--h, 50%);
  background: linear-gradient(180deg, #6EE7B7, #10B981);
  border-radius: 8px 8px 0 0;
  animation: stepRise 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.step-row .st-step:nth-child(1) .st-box { --h: 30%; animation-delay: 0s; }
.step-row .st-step:nth-child(2) .st-box { --h: 52%; animation-delay: 0.1s; }
.step-row .st-step:nth-child(3) .st-box { --h: 74%; animation-delay: 0.2s; }
.step-row .st-step:nth-child(4) .st-box { --h: 96%; animation-delay: 0.3s; }
.step-row .st-step .st-lbl {
  margin-top: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: 0.04em;
}
.step-row .st-step .st-dot {
  position: absolute;
  top: calc((100% - var(--h, 50%)) - 6px);
  left: 50%;
  transform: translateX(-50%);
  width: 8px; height: 8px;
  background: #047857;
  border-radius: 50%;
  box-shadow: 0 0 0 3px #FFF, 0 0 0 4px rgba(4, 120, 87, 0.2);
}

/* 7 天柱状图 + 趋势线 */
.dc-bars.dc-bars-7 { position: relative; }
.dc-trend-line {
  position: absolute;
  inset: 16px 8px 8px 8px;
  width: calc(100% - 16px);
  height: calc(100% - 24px);
  pointer-events: none;
  z-index: 2;
}
.dc-bars.dc-bars-7 .dc-bar { background: rgba(15, 23, 42, 0.08); }
.dc-col.dc-old .dc-bars.dc-bars-7 .dc-bar { background: linear-gradient(180deg, #FFA8A8, #DC2626); }
.dc-col.dc-new .dc-bars.dc-bars-7 .dc-bar { background: linear-gradient(180deg, #6EE7B7, #10B981); }
@keyframes trendDraw {
  to { stroke-dashoffset: 0; }
}

/* hero stat 容纳阶梯图 */
.hero-stat-chart {
  min-width: 130px;
  height: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.hero-stat-chart .step-trend { width: 100%; max-width: 130px; }
.hero-stat-chart .label { margin-top: 4px; }

/* 7 天对比图 - 传统（不稳定波动） */
.dc-bars-unstable .dc-bar-wave {
  background: linear-gradient(180deg, #FFB3B3, #DC2626);
  opacity: 0.85;
  animation: waveShake 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.dc-bars-unstable .dc-bar-wave:nth-child(odd) {
  animation-delay: 0.05s;
}
.dc-bars-unstable .dc-bar-wave:nth-child(even) {
  animation-delay: 0.15s;
}
@keyframes waveShake {
  0% { height: 0; opacity: 0.3; }
  60% { transform: scaleY(1.05); }
  100% { transform: scaleY(1); opacity: 0.85; }
}

/* 7 天对比图 - PACE（稳定上升） */
.dc-bars-stable .dc-bar-rise {
  background: linear-gradient(180deg, #6EE7B7, #10B981);
  position: relative;
}
.dc-bars-stable .dc-bar-rise::after {
  content: '';
  position: absolute;
  top: -5px; left: 50%;
  transform: translateX(-50%);
  width: 9px; height: 9px;
  background: #047857;
  border-radius: 50%;
  box-shadow: 0 0 0 3px #FFF, 0 0 0 4px rgba(4, 120, 87, 0.18);
  z-index: 1;
}
.dc-bars-stable .dc-bar-rise:nth-child(1) { animation-delay: 0s; }
.dc-bars-stable .dc-bar-rise:nth-child(2) { animation-delay: 0.08s; }
.dc-bars-stable .dc-bar-rise:nth-child(3) { animation-delay: 0.16s; }
.dc-bars-stable .dc-bar-rise:nth-child(4) { animation-delay: 0.24s; }
.dc-bars-stable .dc-bar-rise:nth-child(5) { animation-delay: 0.32s; }
.dc-bars-stable .dc-bar-rise:nth-child(6) { animation-delay: 0.40s; }
.dc-bars-stable .dc-bar-rise:nth-child(7) { animation-delay: 0.48s; }

/* PACE 右上角大箭头（持续增长） */
.dc-arrow-tip {
  position: absolute;
  top: -4px; right: 4px;
  width: 28px; height: 28px;
  background: #FFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(4, 120, 87, 0.25), 0 0 0 3px rgba(16, 185, 129, 0.12);
  z-index: 3;
  animation: arrowPulse 2.4s ease-in-out 1.2s infinite;
}
.dc-arrow-tip svg {
  width: 16px;
  height: 16px;
  transform: translate(1px, -1px);
}
@keyframes arrowPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

/* 4 维度评分卡：flex 布局 + 趋势条固定底部 */
.tinted-card-flex {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.tinted-card-flex .tc-body { flex: 1 1 auto; }
.tinted-card-flex .trend-bar { margin-top: auto; }

/* ========== 渐进增长曲线（统一替代 4 个数据展示） ========== */
.rise-chart {
  position: relative;
  width: 100%;
  max-width: 180px;
  height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}
.rise-chart svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}
.rise-chart .rc-fill {
  fill: url(#rc-gradient);
  opacity: 0.85;
}
.rise-chart .rc-line {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  animation: rcDraw 1.6s cubic-bezier(0.22, 1, 0.36, 1) 0.2s forwards;
}
.rise-chart .rc-line-blue   { stroke: #0066FF; }
.rise-chart .rc-line-green  { stroke: #10B981; }
.rise-chart .rc-line-purple { stroke: #7C3AED; }
.rise-chart .rc-line-rose   { stroke: #DB2777; }
.rise-chart .rc-start,
.rise-chart .rc-end {
  fill: #FFF;
  stroke-width: 2.5;
}
.rise-chart .rc-start { stroke: var(--rc-c, #10B981); }
.rise-chart .rc-end   {
  stroke: var(--rc-c, #10B981);
  filter: drop-shadow(0 0 4px rgba(16, 185, 129, 0.4));
}
.rise-chart .rc-end-pulse {
  fill: none;
  stroke: var(--rc-c, #10B981);
  stroke-width: 1.5;
  opacity: 0;
  transform-origin: center;
  transform-box: fill-box;
  animation: rcPulse 2.4s ease-out 1.6s infinite;
}
@keyframes rcDraw {
  to { stroke-dashoffset: 0; }
}
@keyframes rcPulse {
  0%   { opacity: 0.6; transform: scale(0.5); }
  100% { opacity: 0;   transform: scale(2.4); }
}

/* 紧凑版（hero stat 用） */
.rise-chart.rise-compact {
  max-width: 140px;
  height: 48px;
}

/* ========== 里程碑三台阶（替代 rise-chart，更稳的"达成"语义） ==========
   - 3 个递增高度的柱（低/中/高），最右柱顶端放一个对勾圆圈 + 脉冲光晕
   - 表达"持续学习能达到最高" — 不画线、不写数字
   - 颜色：--ms-c 主题色（PACE 绿 / 语法紫 / 声韵玫红 / GPS 蓝）
*/
.milestone-rise {
  position: relative;
  width: 100%;
  max-width: 170px;
  height: 60px;
  margin: 0 auto 10px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.milestone-rise svg { width: 100%; height: 100%; display: block; overflow: visible; }
.milestone-rise .ms-bar {
  transform-origin: bottom;
  transform-box: fill-box;
  animation: msRise 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.milestone-rise .ms-bar-1 { animation-delay: 0s; }
.milestone-rise .ms-bar-2 { animation-delay: 0.12s; }
.milestone-rise .ms-bar-3 { animation-delay: 0.24s; }
.milestone-rise .ms-flag { opacity: 0; animation: msFlagIn 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.7s both; }
.milestone-rise .ms-check-fg { opacity: 0; animation: msCheckIn 0.4s ease-out 0.95s both; }
.milestone-rise .ms-pulse {
  fill: none;
  stroke: var(--ms-c, #10B981);
  stroke-width: 1.5;
  opacity: 0;
  transform-origin: 160px 10px;
  transform-box: view-box;
  animation: msPulse 2.4s ease-out 1.1s infinite;
}
@keyframes msRise {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}
@keyframes msFlagIn {
  from { opacity: 0; transform: scale(0.3) translateY(6px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes msCheckIn {
  from { opacity: 0; stroke-dashoffset: 12; }
  to   { opacity: 1; stroke-dashoffset: 0; }
}
@keyframes msPulse {
  0%   { opacity: 0.55; transform: scale(0.5); }
  100% { opacity: 0;    transform: scale(2.6); }
}
/* 紧凑版（hero stat 用） — 与 .hero-stat .num 字号（36-56px）高度对齐 */
.milestone-rise.ms-compact {
  width: 168px;   /* 200 * (56/64) ≈ 175 → 168 留点余量 */
  max-width: 100%;
  height: 56px;
}

/* 7天对比图新：双折线图（波动 vs 上升） */
.dc-bars-7 {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 12px 4px 0;
  height: 168px;
  border-bottom: 2px solid rgba(15, 23, 42, 0.08);
  margin-bottom: 14px;
}
.dc-bars-7 .dc-wave-svg {
  width: 100%;
  height: 180px;
  flex: 1;
  display: block;
}

/* ===== Contact 页面：邮箱卡 + 公司信息表 ===== */
.ct-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 24px 0 32px;
}
@media (max-width: 760px) {
  .ct-grid { grid-template-columns: 1fr; }
}
.ct-card {
  background: #FFF;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.ct-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.ct-card-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: #FFF;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.ct-card-icon .svg-icon { width: 22px; height: 22px; color: #FFF; }
.ct-card-title {
  font-size: 17px; font-weight: 700; color: var(--text);
  margin-top: 4px;
}
.ct-card-desc {
  font-size: 13px; line-height: 1.6; color: var(--text-3);
  min-height: 40px;
}
.ct-card-mail {
  font-size: 13px; font-weight: 600;
  color: var(--brand, #0066CC);
  text-decoration: none;
  padding: 8px 14px;
  background: rgba(0,102,255,0.06);
  border-radius: 8px;
  display: inline-block;
  align-self: flex-start;
  max-width: 100%;
  word-break: break-all;
  overflow-wrap: anywhere;
  transition: background .2s var(--ease);
  font-family: ui-monospace, 'SF Mono', 'JetBrains Mono', monospace;
}
.ct-card-mail:hover { background: rgba(0,102,255,0.12); }

.ct-info {
  background: rgba(0,0,0,0.02);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 4px 0;
  margin: 16px 0 24px;
}
.ct-info-row {
  display: flex;
  align-items: flex-start;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  gap: 16px;
}
.ct-info-row:last-child { border-bottom: none; }
.ct-info-key {
  flex: 0 0 130px;
  font-size: 14px; color: var(--text-3); font-weight: 500;
}
.ct-info-val {
  flex: 1;
  font-size: 14px; color: var(--text); font-weight: 500;
  line-height: 1.6;
}
@media (max-width: 600px) {
  .ct-info-row { flex-direction: column; gap: 4px; padding: 12px 18px; }
  .ct-info-key { flex: none; }
}

/* ===== 两大学院（豆可语法学院 + 豆可万卷堂）===== */

/* Academy 大卡片：学院入口主页板块用 */
.academy-card {
  position: relative;
  display: block;
  background: #FFFFFF;
  border-radius: 20px;
  border: 1px solid rgba(0,0,0,0.06);
  padding: 40px 36px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}
.academy-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--accent, var(--brand));
}
.academy-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.08);
  border-color: var(--accent, var(--brand));
}
.academy-card .ac-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent, var(--brand));
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.academy-card .ac-eyebrow .ac-tag {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 10px;
  letter-spacing: 0.1em;
}
.academy-card .ac-title {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 12px;
  color: var(--text);
}
.academy-card .ac-sub {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 24px;
  line-height: 1.5;
}
.academy-card .ac-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.academy-card .ac-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.5;
}
.academy-card .ac-list .dot {
  width: 6px;
  height: 6px;
  background: var(--accent, var(--brand));
  border-radius: 50%;
  margin-top: 9px;
  flex-shrink: 0;
}
.academy-card .ac-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--accent, var(--brand));
  margin-top: 4px;
}
.academy-card .ac-cta svg { transition: transform .25s var(--ease); }
.academy-card:hover .ac-cta svg { transform: translateX(4px); }
.academy-card.theme-purple { --accent: #6D28D9; }
.academy-card.theme-blue { --accent: #0040CC; }

/* 对话气泡（语法学院 Demo）*/
.chat-demo {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px 24px;
}
.chat-demo .cd-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.chat-demo .cd-head .cd-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
  color: #FFF;
}
.chat-demo.theme-purple .cd-head .cd-avatar { background: linear-gradient(135deg, #7C3AED, #A855F7); }
.chat-demo.theme-blue .cd-head .cd-avatar { background: linear-gradient(135deg, #0040CC, #0066FF); }
.chat-demo.theme-green .cd-head .cd-avatar { background: linear-gradient(135deg, #047857, #10B981); }
.chat-demo.theme-orange .cd-head .cd-avatar { background: linear-gradient(135deg, #C2410C, #F97316); }
.chat-demo.theme-rose .cd-head .cd-avatar { background: linear-gradient(135deg, #B91C1C, #EF4444); }
.chat-demo .cd-head .cd-name {
  font-size: 14px; font-weight: 700;
}
.chat-demo .cd-head .cd-tag {
  font-size: 11px; font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(0,0,0,0.05);
  color: var(--text-3);
  margin-left: auto;
}
.chat-bubble {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  max-width: 88%;
}
.chat-bubble.is-system { align-self: flex-start; }
.chat-bubble.is-user { align-self: flex-end; flex-direction: row-reverse; margin-left: auto; }
.chat-bubble .cb-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
  color: #FFF;
  flex-shrink: 0;
}
.chat-bubble.is-system .cb-avatar { background: #1D1D1F; }
.chat-bubble.is-user .cb-avatar { background: #E5E5EA; color: #1D1D1F; }
.chat-bubble .cb-text {
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.55;
  word-wrap: break-word;
  overflow-wrap: anywhere;
}
.chat-bubble.is-system .cb-text {
  background: #F5F5F7;
  color: var(--text);
  border-top-left-radius: 4px;
}
.chat-bubble.is-user .cb-text {
  background: #1D1D1F;
  color: #FFFFFF;
  border-top-right-radius: 4px;
}
.chat-bubble .cb-text .cb-correct {
  display: inline-block;
  margin-top: 6px;
  padding: 6px 10px;
  background: rgba(16, 185, 129, 0.08);
  color: #047857;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 12.5px;
  border-radius: 6px;
  border-left: 2px solid #10B981;
}

/* 31 省市考情表（万卷堂）*/
.province-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  table-layout: auto;
}
.province-table-wrap {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.province-table-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 14px 20px;
  background: #FAFAFB;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.province-table-head::-webkit-scrollbar { display: none; }
.province-tab {
  flex-shrink: 0;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  transition: all .2s var(--ease);
}
.province-tab:hover { background: rgba(0,0,0,0.04); }
.province-tab.active {
  background: #1D1D1F;
  color: #FFFFFF;
  border-color: #1D1D1F;
}
.province-table thead th {
  text-align: left;
  padding: 16px 18px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  background: #FAFAFB;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.province-table thead th:nth-child(1) { width: 80px; }
.province-table thead th:nth-child(3),
.province-table thead th:nth-child(4) { width: 90px; text-align: center; }
.province-table tbody td {
  padding: 18px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  color: var(--text);
}
.province-table tbody tr:last-child td { border-bottom: none; }
.province-table tbody tr:hover { background: rgba(0,0,0,0.02); }
.province-table .p-name {
  font-weight: 700;
  color: var(--text);
  font-size: 15px;
  white-space: nowrap;
}
.province-table .p-feat {
  color: var(--text-2);
  font-size: 12.5px;
  line-height: 1.7;
  min-width: 480px;
  max-width: 620px;
}
.province-table .p-feat strong {
  color: #0040CC;
  font-weight: 700;
}
.province-table .p-feat br + strong,
.province-table .p-feat strong:first-child {
  color: #1D1D1F;
}
.province-table .p-score {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-size: 13px;
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  text-align: center;
}

/* 31 省考情表 · 顶部数据声明 */
.province-disclaimer {
  display: flex;
  gap: 16px;
  background: linear-gradient(135deg, rgba(0, 102, 204, 0.04), rgba(124, 58, 237, 0.03));
  border: 1px solid rgba(0, 102, 204, 0.14);
  border-left: 4px solid #0040CC;
  border-radius: 16px;
  padding: 22px 26px;
  margin-bottom: 24px;
}
.province-disclaimer-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: #FFFFFF;
  border: 1px solid rgba(0, 102, 204, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #0040CC;
  font-weight: 700;
}
.province-disclaimer-body {
  flex: 1;
  min-width: 0;
}
.province-disclaimer-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #0040CC;
  margin-bottom: 8px;
}
.province-disclaimer-text {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 12px;
}
.province-disclaimer-text strong {
  color: #1D1D1F;
  font-weight: 600;
}
.province-disclaimer-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-2);
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
}
.pdn-tag {
  flex-shrink: 0;
  display: inline-block;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 4px;
  background: rgba(217, 119, 6, 0.12);
  color: #B45309;
  margin-top: 1px;
  white-space: nowrap;
}
.pdn-tag-warn {
  background: rgba(217, 119, 6, 0.12);
  color: #B45309;
}
.province-disclaimer-note strong {
  color: #1D1D1F;
  font-weight: 700;
}
@media (max-width: 1024px) {
  /* 移动端 + 平板：隐藏完整表格 + Tabs，显示简版卡片 */
  .province-table-wrap,
  .province-tabs {
    display: none;
  }
  .province-mobile {
    display: block;
  }
  .province-mobile-hint {
    display: block;
  }
  .province-mobile-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .province-mobile-grid {
    grid-template-columns: 1fr;
  }
}

/* 移动端省份简版卡片（PC 默认隐藏，mobile 显示）*/
@media (min-width: 1025px) {
  .province-mobile,
  .province-mobile-hint { display: none !important; }
}
.province-mobile {
  margin-top: 32px;
}
.province-mobile-hint {
  font-size: 14px;
  color: var(--text-3);
  text-align: center;
  margin: 0 0 20px;
  line-height: 1.6;
}
.province-mobile-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.province-mobile-card {
  background: #FFFFFF;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 16px;
  padding: 20px 22px;
  border-left: 4px solid #0040CC;
}
.province-mobile-card .pmc-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}
.province-mobile-card .pmc-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.01em;
}
.province-mobile-card .pmc-score {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 600;
  color: #0040CC;
  background: rgba(0, 64, 204, 0.06);
  padding: 4px 10px;
  border-radius: 6px;
}
.province-mobile-card .pmc-body {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-2);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}
.province-mobile-card .pmc-section {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-2);
  margin-bottom: 10px;
}
.province-mobile-card .pmc-section:last-of-type {
  margin-bottom: 12px;
}
.pmc-tag {
  flex-shrink: 0;
  display: inline-block;
  padding: 3px 8px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border-radius: 4px;
  background: rgba(0, 102, 204, 0.1);
  color: #0040CC;
  white-space: nowrap;
  margin-top: 1px;
  line-height: 1.4;
}
.pmc-tag-future {
  background: rgba(217, 119, 6, 0.12);
  color: #B45309;
}
.province-mobile-card .pmc-feat {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-2);
  margin-bottom: 8px;
  display: none;
}
.province-mobile-card .pmc-feat strong {
  color: #0040CC;
  font-weight: 700;
}
.province-mobile-card .pmc-meta {
  font-size: 12px;
  color: var(--text-3);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.02em;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

/* 学段时间轴（万卷堂）*/
.exam-timeline {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 60px 0 32px 0;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.exam-timeline::before {
  content: '';
  position: absolute;
  top: 86px; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, rgba(0,102,204,0.15), rgba(124,58,237,0.15), rgba(220,38,38,0.15));
  z-index: 0;
}
.exam-timeline .et-node {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  width: 110px;
  text-align: center;
  background: transparent;
  cursor: pointer;
}
.exam-timeline .et-dot {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 3px solid var(--accent, var(--brand));
  margin: 0 auto 14px auto;
  transition: transform .25s var(--ease);
}
.exam-timeline .et-node:hover .et-dot { transform: scale(1.25); }
.exam-timeline .et-grade {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent, var(--brand));
  margin-bottom: 6px;
}
.exam-timeline .et-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.exam-timeline .et-meta {
  font-size: 12px;
  color: var(--text-3);
  line-height: 1.5;
}
@media (max-width: 720px) {
  .exam-timeline { padding: 32px 0 24px 0; }
  .exam-timeline::before { top: 58px; }
  .exam-timeline .et-node { width: 88px; }
  .exam-timeline .et-name { font-size: 13px; }
}

/* 难度递进条（万卷堂难度递进模型）*/
.levelup {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 36px 28px;
}
.levelup .lu-step {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 20px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}
.levelup .lu-step:last-child { border-bottom: none; }
.levelup .lu-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-3);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.04em;
}
.levelup .lu-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.levelup .lu-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.levelup .lu-meta {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.55;
}
.levelup .lu-meta strong { color: var(--text); font-weight: 600; }
@media (max-width: 600px) {
  .levelup .lu-step { grid-template-columns: 1fr; gap: 6px; }
}

/* AI 评估 4 步流程（万卷堂）*/
.eval-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.eval-flow .ef-step {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px 20px;
  position: relative;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.eval-flow .ef-step:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.06);
}
.eval-flow .ef-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent, var(--brand));
  margin-bottom: 10px;
}
.eval-flow .ef-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.3;
}
.eval-flow .ef-body {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-2);
}
@media (max-width: 980px) {
  .eval-flow { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .eval-flow { grid-template-columns: 1fr; }
}

/* 4 大考试体系大卡（万卷堂 4 大 tinted-card）*/
.exam-type-card {
  position: relative;
  background: #FFFFFF;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 20px;
  padding: 36px 32px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.exam-type-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--accent, var(--brand));
  border-radius: 20px 20px 0 0;
}
.exam-type-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.08);
}
.exam-type-card .etc-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent, var(--brand));
  margin-bottom: 12px;
}
.exam-type-card .etc-title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 8px;
}
.exam-type-card .etc-sub {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.55;
  margin-bottom: 20px;
}
.exam-type-card .etc-stats {
  display: flex;
  gap: 20px;
  padding: 14px 0;
  margin-bottom: 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.exam-type-card .etc-stats .es-item {
  flex: 1;
}
.exam-type-card .etc-stats .es-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.exam-type-card .etc-stats .es-label {
  font-size: 11px;
  color: var(--text-3);
  margin-top: 2px;
  letter-spacing: 0.02em;
}
.exam-type-card .etc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.exam-type-card .etc-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text);
}
.exam-type-card .etc-list .dot {
  width: 5px; height: 5px;
  background: var(--accent, var(--brand));
  border-radius: 50%;
  margin-top: 8px;
  flex-shrink: 0;
}
.exam-type-card.theme-blue { --accent: #0040CC; }
.exam-type-card.theme-purple { --accent: #6D28D9; }
.exam-type-card.theme-orange { --accent: #C2410C; }
.exam-type-card.theme-rose { --accent: #B91C1C; }

/* 32 大类语法 9 大类目卡片（语法学院）*/
.grammar-cat {
  position: relative;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px 22px;
  transition: all .3s var(--ease);
  overflow: hidden;
}
.grammar-cat::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--accent, var(--brand));
}
.grammar-cat:hover {
  border-color: var(--accent, var(--brand));
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.grammar-cat .gc-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent, var(--brand));
  margin-bottom: 8px;
}
.grammar-cat .gc-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.grammar-cat .gc-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.grammar-cat .gc-points li {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-2);
  display: flex;
  align-items: flex-start;
  gap: 6px;
}
.grammar-cat .gc-points li::before {
  content: '·';
  color: var(--accent, var(--brand));
  font-weight: 700;
  flex-shrink: 0;
}
.grammar-cat.theme-blue { --accent: #0040CC; }
.grammar-cat.theme-purple { --accent: #6D28D9; }
.grammar-cat.theme-green { --accent: #047857; }
.grammar-cat.theme-orange { --accent: #C2410C; }
.grammar-cat.theme-rose { --accent: #B91C1C; }
.grammar-cat.theme-amber { --accent: #B45309; }
.grammar-cat.theme-mint { --accent: #0E7490; }
.grammar-cat.theme-pink { --accent: #BE185D; }
.grammar-cat.theme-indigo { --accent: #3730A3; }

/* 语法学院两种模式 */
.mode-card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 36px 32px;
  transition: all .3s var(--ease);
}
.mode-card:hover {
  border-color: var(--accent, var(--brand));
  box-shadow: 0 12px 32px rgba(0,0,0,0.06);
}
.mode-card .mc-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent, var(--brand));
  margin-bottom: 12px;
}
.mode-card .mc-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 12px;
}
.mode-card .mc-body {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-2);
  margin-bottom: 18px;
}
.mode-card .mc-scenario {
  background: #FAFAFB;
  border-left: 3px solid var(--accent, var(--brand));
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.55;
  font-style: italic;
}
.mode-card.theme-blue { --accent: #0040CC; }
.mode-card.theme-purple { --accent: #6D28D9; }

/* 学段卡片 */
.stage-card {
  text-align: center;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 20px;
  transition: all .3s var(--ease);
}
.stage-card:hover {
  border-color: var(--accent, var(--brand));
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
}
.stage-card .sc-stage {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent, var(--brand));
  margin-bottom: 8px;
}
.stage-card .sc-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.stage-card .sc-meta {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
}
.stage-card.theme-mint { --accent: #0E7490; }
.stage-card.theme-blue { --accent: #0040CC; }
.stage-card.theme-purple { --accent: #6D28D9; }

/* 协同闭环（语法学院 × AI 语法引擎）*/
.collaborate-loop {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
}
.collaborate-loop .cl-card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
  position: relative;
}
.collaborate-loop .cl-card .cl-eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent, var(--brand));
  margin-bottom: 10px;
}
.collaborate-loop .cl-card .cl-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.collaborate-loop .cl-card .cl-body {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-2);
}
.collaborate-loop .cl-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 700;
  color: var(--text-3);
}
.collaborate-loop .cl-card.cl-engine { --accent: #0040CC; }
.collaborate-loop .cl-card.cl-academy { --accent: #6D28D9; }
@media (max-width: 720px) {
  .collaborate-loop { grid-template-columns: 1fr; }
  .collaborate-loop .cl-arrow { transform: rotate(90deg); padding: 8px 0; }
}

/* 命题趋势卡片（万卷堂 2024-2026）*/
.trend-card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 24px;
  transition: all .3s var(--ease);
  border-top: 3px solid var(--accent, var(--brand));
}
.trend-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
}
.trend-card .tc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.trend-card .tc-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.trend-card .tc-period {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  background: rgba(0,0,0,0.04);
  border-radius: 4px;
  color: var(--text-3);
  font-family: 'JetBrains Mono', monospace;
}
.trend-card .tc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.trend-card .tc-list li {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-2);
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.trend-card .tc-list li::before {
  content: '→';
  color: var(--accent, var(--brand));
  font-weight: 700;
  flex-shrink: 0;
}
.trend-card.theme-blue { --accent: #0040CC; }
.trend-card.theme-purple { --accent: #6D28D9; }
.trend-card.theme-orange { --accent: #C2410C; }
.trend-card.theme-rose { --accent: #B91C1C; }


/* AI 千人千卷 4 步流程（万卷堂）*/
.ai-personal-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.ap-step {
  position: relative;
  background: #FFFFFF;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 20px;
  padding: 36px 32px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.ap-step::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #0040CC 0%, #6D28D9 100%);
  border-radius: 20px 20px 0 0;
}
.ap-step:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.08);
}
.ap-step .ap-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-3);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.ap-step .ap-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 12px;
  line-height: 1.3;
}
.ap-step .ap-body {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-2);
  margin: 0;
}
.ap-summary {
  margin-top: 48px;
  padding: 32px 40px;
  background: #FFFFFF;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 20px;
  border-left: 4px solid #0040CC;
  text-align: left;
}
.ap-summary .ap-summary-text {
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-2);
  margin: 0;
}
.ap-summary .ap-summary-text strong {
  color: #0040CC;
  font-weight: 700;
}
@media (max-width: 720px) {
  .ai-personal-grid { grid-template-columns: 1fr; }
  .ap-summary { padding: 24px 20px; }
}

/* 万卷堂 Hero 注释（说明哪些按省定制 / 哪些按全国）*/
.hero-note {
  font-size: 15px;
  color: var(--text-2);
  background: rgba(0, 64, 204, 0.06);
  border-left: 3px solid #0040CC;
  padding: 12px 20px;
  border-radius: 8px;
  max-width: 720px;
  margin: 24px auto 0;
  text-align: left;
  line-height: 1.6;
}
.hero-note strong {
  color: #0040CC;
  font-weight: 700;
}

/* hero-stat 副说明（小字）*/
.hero-stat-sub {
  font-size: 12px;
  color: var(--text-3);
  text-align: center;
  margin-top: 6px;
  min-height: 16px;
  letter-spacing: 0.02em;
}

/* ===== 完整体系一张图（index.html 专用） ===== */
.eco-stage {
  margin-top: 64px;
}
.eco-stage-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 980px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.02em;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}
.eco-stage-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 8px;
  border-radius: 980px;
  background: var(--brand);
  color: #FFF;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}
.eco-stage-label {
  color: var(--text-1);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.eco-grid {
  display: grid;
  gap: 20px;
}
.eco-grid-2 { grid-template-columns: repeat(2, 1fr); }
.eco-grid-4 { grid-template-columns: repeat(4, 1fr); }
.eco-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  color: var(--text-3);
  margin: 8px 0;
}
.eco-arrow svg {
  display: block;
}
@media (max-width: 1024px) {
  .eco-grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .eco-stage { margin-top: 48px; }
  .eco-grid-2 { grid-template-columns: 1fr; }
  .eco-grid-4 { grid-template-columns: 1fr; }
  .eco-arrow { height: 32px; }
  .eco-arrow svg { width: 20px; height: 26px; }
}

/* ===== 32 大类语法自由组合图示（combo-flow） ===== */
.combo-flow {
  margin-top: 64px;
  display: grid;
  grid-template-columns: 1fr 120px 1fr;
  gap: 32px;
  align-items: center;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 40px 32px;
}
.cf-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}
.cf-eyebrow {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
  margin-bottom: 4px;
}
.cf-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.cf-cat {
  padding: 5px 11px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 980px;
  font-size: 12px;
  color: var(--text-2);
}
.cf-cat-more {
  background: #F5F5F7;
  color: var(--text-3);
  font-weight: 600;
}
.cf-combos {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}
.cf-combo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-3);
}
.cf-combo-chip {
  padding: 5px 12px;
  background: #1D1D1F;
  color: #fff;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}
.cf-combo-plus {
  color: var(--text-3);
  font-weight: 600;
  font-size: 13px;
}
.cf-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.cf-engine {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #0066CC;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.25);
}
.cf-arrow-label {
  font-size: 12px;
  color: var(--text-2);
  text-align: center;
  font-weight: 500;
  line-height: 1.35;
}
.cf-bubble {
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.55;
  word-break: break-word;
}
.cf-bubble-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(0, 102, 204, 0.1);
  color: #0066CC;
  font-size: 10px;
  font-weight: 700;
  margin-right: 6px;
  vertical-align: middle;
}
.cf-bubble-ai {
  background: #F0F7FF;
  color: #1D1D1F;
  border-top-left-radius: 4px;
}
.cf-bubble-user {
  background: #F5F5F7;
  color: #1D1D1F;
  border-top-right-radius: 4px;
  align-self: flex-end;
  max-width: 90%;
}
.cf-bubble-eval {
  background: #E8F5E9;
  color: #1B5E20;
  font-size: 12px;
  font-weight: 500;
  padding: 8px 12px;
}
@media (max-width: 1024px) {
  /* 移动端：纵向排列 STEP 1 → AI 引擎 → STEP 2 */
  .combo-flow {
    grid-template-columns: 1fr;
    padding: 28px 20px;
    gap: 28px;
  }
  .cf-arrow {
    flex-direction: column;
    gap: 10px;
    min-width: 0;
    position: relative;
  }
  .cf-arrow::before {
    content: "↓";
    display: block;
    font-size: 28px;
    color: var(--text-3);
    line-height: 1;
    font-weight: 300;
  }
  .cf-arrow::after {
    content: "↓";
    display: block;
    font-size: 28px;
    color: var(--text-3);
    line-height: 1;
    font-weight: 300;
  }
  .cf-bubble-user {
    align-self: stretch;
    max-width: 100%;
  }
}
@media (max-width: 600px) {
  .combo-flow {
    padding: 20px 14px;
    margin-top: 40px;
  }
  .cf-bubble {
    font-size: 12px;
  }
  .cf-engine {
    width: 48px;
    height: 48px;
    font-size: 15px;
  }
}

/* ===== 最新动态（首页 + 列表页通用） — 100% 抄 /activities ===== */
.activity-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}
@media (max-width: 960px) { .activity-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .activity-grid { grid-template-columns: 1fr; } }

.activity-card {
  display: block;
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  padding: 24px 24px 20px;
  text-decoration: none;
  color: inherit;
  transition: transform 250ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 250ms ease-out;
}
.activity-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.ac-cover {
  height: 110px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}
.ac-cover-title {
  margin: 0;
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  flex: 1;
  margin-right: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}
.ac-cover-arrow {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1D1D1F;
  font-size: 14px;
  flex-shrink: 0;
}

.ac-desc {
  font-size: 14px;
  color: var(--text-2, #6E6E73);
  line-height: 1.55;
  margin: 0 0 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ac-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-3, #86868B);
  padding-top: 14px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}
.ac-foot-meta { display: flex; gap: 14px; align-items: center; }
.ac-foot-meta span { display: inline-flex; align-items: center; gap: 4px; }
.ac-foot-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.05);
  color: #1D1D1F;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.activities-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-3, #86868B);
}

@media (max-width: 720px) {
  .activity-card { padding: 18px 18px 16px; }
  .ac-cover { height: 80px; padding: 0 14px; margin-bottom: 12px; }
  .ac-title { font-size: 16px; }
  .ac-desc { font-size: 13px; }
}

/* ===== 浮动滚动条指示器（macOS / iOS 风格） ===== */
.scroll-thumb {
  position: fixed;
  top: 0;
  right: 8px;
  width: 4px;
  height: 40px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 2px;
  z-index: 9998;
  pointer-events: none;
  opacity: 0;
  transition: opacity 400ms cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform, opacity;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.scroll-thumb.visible {
  opacity: 1;
}
/* 移动端不显示（系统自带滚动条） */
@media (max-width: 768px) {
  .scroll-thumb { display: none; }
}

/* ===== 一键置顶 ===== */
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 44px;
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.08);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  color: #1D1D1F;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 250ms cubic-bezier(0.22, 1, 0.36, 1),
              transform 250ms cubic-bezier(0.22, 1, 0.36, 1),
              background 200ms ease,
              box-shadow 200ms ease;
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: #FFFFFF;
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  transform: translateY(-2px);
}
.back-to-top:active {
  transform: translateY(0);
}
@media (max-width: 680px) {
  .back-to-top {
    right: 16px;
    bottom: 28px;
    width: 40px;
    height: 40px;
  }
}

/* ================================ */
/* 两端同步 pill 标签（共享组件，index / download 共用） */
/* ================================ */
.platform-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 24px auto 0;
  max-width: 720px;
}
.platform-pill-row.platform-pill-row--center { justify-content: center; }
.platform-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
  border: 1px solid rgba(0,0,0,0.1);
  font-size: 13px;
  font-weight: 500;
  color: #1D1D1F;
  transition: all 250ms cubic-bezier(0.22, 1, 0.36, 1);
  text-decoration: none;
  backdrop-filter: blur(8px) saturate(160%);
  -webkit-backdrop-filter: blur(8px) saturate(160%);
}
.platform-pill:hover { background: #FFFFFF; border-color: rgba(0,0,0,0.2); transform: translateY(-1px); }
.platform-pill .pill-icon {
  width: 14px; height: 14px;
  color: #1D1D1F;
  flex-shrink: 0;
  display: block;
  align-self: center;
  overflow: visible;
}
/* Android 机器人 fill 路径在 viewBox 偏下，
   上移 SVG 容器内 viewBox 起点让视觉重心居中 */
.platform-pill .pill-icon--android {
  transform: translateY(-1.5px);
}
.platform-pill .pill-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #52c41a;
  box-shadow: 0 0 0 3px rgba(82,196,26,0.18);
  flex-shrink: 0;
  animation: pillDotPulse 2.4s ease-in-out infinite;
}
@keyframes pillDotPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(82,196,26,0.18); }
  50%      { box-shadow: 0 0 0 5px rgba(82,196,26,0.10); }
}
@media (max-width: 600px) {
  .platform-pill-row { gap: 8px; margin-top: 18px; }
  .platform-pill { padding: 6px 12px; font-size: 12px; gap: 6px; }
}

/* Hero 按钮下方紧跟 pill：抵消 .hero-cta margin-bottom 80px，让 pill 紧贴按钮 */
.hero-cta + .platform-pill-row {
  margin-top: -56px;
  margin-bottom: 56px;
}
@media (max-width: 600px) {
  .hero-cta + .platform-pill-row { margin-top: -30px; margin-bottom: 36px; }
}

/* ===== 能力评估六维雷达布局 ===== */
.ability-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
}
.ability-grid > .radar-container,
.ability-grid > .ability-list {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.ability-grid > .radar-container {
  justify-content: center;
  align-items: center;
}
.ability-grid > .radar-container .radar-svg {
  width: 100%;
  height: auto;
  max-width: 420px;
  max-height: 480px;
}
.ability-grid > .ability-list {
  gap: 20px;
  justify-content: space-between;
}
.ability-grid > .ability-list > .ability-row {
  flex: 1 1 0;
  min-height: 0;
}
@media (max-width: 768px) {
  .ability-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .ability-grid > .radar-container {
    order: 1;
  }
  .ability-grid > .ability-list {
    order: 2;
  }
  .ability-grid > .ability-list > .ability-row {
    flex: 0 0 auto;
  }
}

/* ===== Hero 场景引子 + 主点题（第二阶段层级：引子弱、回应强、H1 为主角） ===== */
.hero-hook {
  display: inline-block;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-3, #86868B);
  margin: 0 auto 10px;
}
.hero-hook::before { content: "「"; }
.hero-hook::after { content: "」"; }
.hero-answer {
  font-size: 18px;
  line-height: 1.55;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text, #1D1D1F);
  margin: 0 auto 30px;
}

/* =========================================================================
   第二阶段设计升级（克制精致版）
   设计原则：不增文字，只升视觉层级——小标精细、大标更轻、副标更窄、
   主卡突出、CTA 黑底呼吸感、tinted-card 抬升更明显。
   ========================================================================= */

/* ----- Section 编号标签 ----- */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3, #64748B);
  margin-bottom: 24px;
  padding: 0;
}
.section-tag::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: currentColor;
  opacity: 0.45;
  flex: none;
}
.section-tag-num {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", monospace;
  font-weight: 700;
  color: var(--text, #0F172A);
  font-size: 13px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}
.section-head .section-tag { display: inline-flex; }
.section-head.center .section-tag { display: inline-flex; margin-left: auto; margin-right: auto; }

/* ----- 大标 display-h1（更轻的字距 + clamp 字号）----- */
.display-h1 {
  font-size: clamp(36px, 4.8vw, 60px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.035em;
  color: var(--text, #0F172A);
  margin: 0 0 22px;
  text-wrap: balance;
}
.display-h1 em {
  font-style: normal;
  color: var(--accent, #0066CC);
  font-weight: 800;
}
.display-md {
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text, #0F172A);
  margin: 0 0 18px;
  text-wrap: balance;
}
.section-head .h1, .section-head .display-h1 { margin-bottom: 22px; }

/* ----- 副标 subtitle ----- */
.subtitle {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-2, #334155);
  max-width: 640px;
  margin: 0 0 48px;
  font-weight: 400;
  text-wrap: pretty;
}
.section-head.center .subtitle { margin-left: auto; margin-right: auto; }

/* ----- 板块呼吸感：section 上下 padding 加大 ----- */
.section { padding: clamp(88px, 10vw, 132px) 0; }
.section-lg { padding: clamp(120px, 13vw, 168px) 0; }
@media (max-width: 680px) {
  .section { padding: 64px 0; }
  .section-lg { padding: 88px 0; }
  .subtitle { margin-bottom: 36px; }
}

/* ----- 视觉锚点：section 顶部分隔条 ----- */
.section-rule {
  width: 40px;
  height: 2px;
  background: var(--text, #0F172A);
  opacity: 0.10;
  margin: 0 auto 56px;
  border-radius: 2px;
}
.section-head + .section-rule { margin-top: -32px; }

/* ----- 主卡 featured：首张 tinted-card 突出 ----- */
.tinted-card {
  transition: transform 400ms cubic-bezier(0.22,1,0.36,1),
              box-shadow 400ms cubic-bezier(0.22,1,0.36,1),
              border-color 400ms;
}
.tinted-card:hover {
  transform: translateY(-4px);
  background: var(--tint-bg-hover, var(--tint-bg, #FFF));
  box-shadow: 0 18px 44px var(--tint-glow, rgba(15,23,42,0.10)), inset 0 1px 0 rgba(255,255,255,0.65);
  border-color: var(--accent, var(--brand));
}
.tinted-card.card-featured {
  background: linear-gradient(180deg, var(--tint-bg-hover, #FFFFFF) 0%, var(--tint-bg, #FAFBFC) 100%);
  box-shadow: 0 10px 32px var(--tint-glow, rgba(15,23,42,0.06)), inset 0 1px 0 rgba(255,255,255,0.65);
  border-color: var(--tint-line, rgba(15,23,42,0.06));
  position: relative;
}
.tinted-card.card-featured::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--accent, #0066CC);
  border-radius: 20px 0 0 20px;
}
.tinted-card.card-featured .tc-eyebrow {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-3, #64748B);
  margin-bottom: 14px;
}
.tinted-card.card-featured .tc-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text, #0F172A);
}
.tinted-card.card-featured .tc-body {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2, #334155);
}

/* ----- pace-card 同步升级（first card 突出）----- */
.pace-card {
  transition: transform 400ms cubic-bezier(0.22,1,0.36,1),
              box-shadow 400ms;
}
.pace-card:hover {
  transform: translateY(-4px);
  background: var(--tint-bg-hover, var(--tint-bg, #FFF));
  box-shadow: 0 18px 44px var(--tint-glow, rgba(15,23,42,0.10)), inset 0 1px 0 rgba(255,255,255,0.65);
}
.pace-card.card-featured {
  background: linear-gradient(180deg, var(--tint-bg-hover, #FFFFFF) 0%, var(--tint-bg, #FAFBFC) 100%);
  box-shadow: 0 10px 32px var(--tint-glow, rgba(15,23,42,0.06)), inset 0 1px 0 rgba(255,255,255,0.65);
}

/* ----- 步骤卡（04 步法等）的流程线 ----- */
.flow-line {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 32px auto 40px;
  color: var(--text-3, #64748B);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  font-family: ui-monospace, "SF Mono", monospace;
  max-width: 360px;
}
.flow-line::before, .flow-line::after {
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.3;
}

/* ----- 步骤卡数字徽章化（更精致）----- */
.pace-letter, .tc-letter {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  font-family: ui-monospace, "SF Mono", monospace;
  letter-spacing: -0.02em;
}

/* ----- Callout 重点句块 ----- */
.callout {
  display: flex;
  align-items: stretch;
  gap: 0;
  padding: 0;
  background: #fff;
  border-radius: 20px;
  border: 1px solid rgba(15,23,42,0.06);
  box-shadow: 0 4px 20px rgba(15,23,42,0.04);
  margin: 40px 0;
  overflow: hidden;
}
.callout-bar {
  width: 5px;
  background: linear-gradient(180deg, var(--accent, #0066CC) 0%, #2563EB 100%);
  flex: none;
}
.callout-inner {
  padding: 28px 32px;
  flex: 1;
}
.callout-tag {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent, #0066CC);
  margin-bottom: 10px;
}
.callout-body {
  font-size: 20px;
  line-height: 1.55;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text, #0F172A);
  margin: 0;
  text-wrap: balance;
}

/* ----- data-compare 黑底新卡 ----- */
.dc-new {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  color: #fff;
  border: none;
}
.dc-new .dc-num,
.dc-new .dc-label { color: #fff; }
.dc-new .dc-label { opacity: 0.65; }
.dc-new .dc-desc { color: rgba(255,255,255,0.78); }
.dc-new .dc-trend { color: #34D399; }

/* ----- CTA section 黑底升级 ----- */
.cta-section {
  padding: clamp(88px, 10vw, 132px) 0;
  background: transparent;
}
.cta-card {
  background: radial-gradient(ellipse at top, #1E293B 0%, #0F172A 70%);
  color: #fff;
  border-radius: 28px;
  padding: clamp(64px, 8vw, 112px) clamp(32px, 5vw, 72px);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(15,23,42,0.18);
}
.cta-card::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
}
.cta-card::after {
  content: "";
  position: absolute;
  bottom: -120px; right: -120px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(37,99,235,0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.cta-card .eyebrow { color: rgba(255,255,255,0.55); margin-bottom: 20px; display: inline-block; }
.cta-card h2 {
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: #fff;
  margin: 0 0 20px;
  text-wrap: balance;
  position: relative;
  z-index: 1;
}
.cta-card p {
  font-size: 18px;
  line-height: 1.6;
  color: rgba(255,255,255,0.72);
  margin: 0 auto 40px;
  max-width: 560px;
  position: relative;
  z-index: 1;
}
.cta-card .btn-primary {
  background: #fff;
  color: #0F172A;
  position: relative;
  z-index: 1;
}
.cta-card .btn-primary:hover { background: #F1F5F9; }
.cta-card .btn-secondary {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.25);
  position: relative;
  z-index: 1;
}
.cta-card .btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.4); }

/* ==========================================================================
   二阶段设计系统 v2 · 统一骨架 + 独立组件库
   原则：14 页排版结构一致（统一 hero/section/cta 节奏），
   每页自由组合不同组件 + 独立 SVG 概念图 = 各自有特点
   ========================================================================== */

/* ---------- 统一骨架：SECTION ---------- */
.section { padding: clamp(88px, 10vw, 132px) 0; }
.section-inner { max-width: 1080px; margin: 0 auto; }

/* ---------- 关键句包装：callout ---------- */
.callout {
  display: flex; gap: 0; align-items: stretch;
  background: #fff; border-radius: 20px;
  border: 1px solid rgba(15,23,42,0.05);
  box-shadow: 0 4px 20px rgba(15,23,42,0.04);
  margin: 48px 0; overflow: hidden;
}
.callout-bar {
  width: 5px; flex: none;
  background: linear-gradient(180deg, var(--accent, #0066CC) 0%, #2563EB 100%);
}
.callout-bar.alt-1 { background: linear-gradient(180deg, #6366F1, #4F46E5); }
.callout-bar.alt-2 { background: linear-gradient(180deg, #059669, #047857); }
.callout-bar.alt-3 { background: linear-gradient(180deg, #0891B2, #0E7490); }
.callout-inner { padding: 32px 40px; flex: 1; }
.callout-tag {
  display: block; font-size: 11px; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent, #0066CC); margin-bottom: 12px;
}
.callout-tag.alt-1 { color: #6366F1; }
.callout-tag.alt-2 { color: #059669; }
.callout-tag.alt-3 { color: #0891B2; }
.callout-body {
  font-size: 24px; line-height: 1.45; font-weight: 600;
  letter-spacing: -0.015em; color: var(--text, #1D1D1F);
  margin: 0; text-wrap: balance;
}

/* ---------- 关键句包装：spotlight（黑底大字）---------- */
.spotlight {
  background: radial-gradient(ellipse at top left, #1E293B 0%, #0F172A 70%);
  color: #fff; border-radius: 24px; padding: 56px 48px;
  margin: 56px 0; position: relative; overflow: hidden;
}
.spotlight::after {
  content: ""; position: absolute; top: -80px; right: -80px;
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(37,99,235,0.20), transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.spotlight-tag {
  font-size: 11px; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: rgba(255,255,255,0.55);
  margin-bottom: 16px; position: relative;
}
.spotlight-quote {
  font-size: 30px; line-height: 1.32; font-weight: 700;
  letter-spacing: -0.02em; margin: 0; max-width: 720px;
  position: relative; text-wrap: balance;
}

/* ---------- 步骤组件 step-block（带数字徽章）---------- */
.step-block {
  display: flex; gap: 24px; align-items: flex-start;
  padding: 28px 32px; background: #fff;
  border-radius: 20px; border: 1px solid rgba(15,23,42,0.05);
  box-shadow: 0 2px 12px rgba(15,23,42,0.03);
  transition: all 300ms cubic-bezier(0.22,1,0.36,1);
}
.step-block:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(15,23,42,0.07);
  border-color: rgba(15,23,42,0.08);
}
.step-num {
  width: 52px; height: 52px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent, #0066CC); color: #fff;
  font-family: ui-monospace, monospace; font-weight: 700;
  font-size: 20px; flex: none;
  box-shadow: 0 6px 16px rgba(0,102,204,0.22);
}
.step-num.alt-1 { background: #6366F1; box-shadow: 0 6px 16px rgba(99,102,241,0.22); }
.step-num.alt-2 { background: #0891B2; box-shadow: 0 6px 16px rgba(8,145,178,0.22); }
.step-num.alt-3 { background: #059669; box-shadow: 0 6px 16px rgba(5,150,105,0.22); }
.step-content { flex: 1; min-width: 0; }
.step-eyebrow {
  font-size: 11px; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent, #0066CC);
  margin-bottom: 6px;
}
.step-eyebrow.alt-1 { color: #6366F1; }
.step-eyebrow.alt-2 { color: #0891B2; }
.step-eyebrow.alt-3 { color: #059669; }
.step-title { font-size: 20px; font-weight: 700; margin: 0 0 10px; color: var(--text); letter-spacing: -0.01em; }
.step-body { font-size: 15px; line-height: 1.7; color: var(--text-2); margin: 0; }

/* step-block 紧凑模式（4 列横排时用） */
.step-block.compact { padding: 20px 18px; gap: 14px; align-items: stretch; flex-direction: column; }
.step-block.compact .step-num { width: 40px; height: 40px; font-size: 17px; border-radius: 12px; }
.step-block.compact .step-eyebrow { display: none; }
.step-block.compact .step-title { font-size: 16px; margin-bottom: 6px; line-height: 1.3; }
.step-block.compact .step-body { font-size: 13px; line-height: 1.5; }

/* ---------- 大数字 bignum ---------- */
.bignum-row {
  display: grid; grid-template-columns: auto 1fr; gap: 40px;
  align-items: center; padding: 36px 0;
  border-top: 1px solid rgba(15,23,42,0.08);
  border-bottom: 1px solid rgba(15,23,42,0.08);
  margin: 48px 0;
}
.bignum-num {
  font-size: 96px; font-weight: 800; letter-spacing: -0.045em;
  line-height: 0.9; color: var(--text, #0F172A);
  font-family: ui-monospace, monospace; font-variant-numeric: tabular-nums;
}
.bignum-content { padding-left: 32px; border-left: 1px solid rgba(15,23,42,0.08); }
.bignum-title { font-size: 18px; font-weight: 700; margin: 0 0 8px; color: var(--text); }
.bignum-desc { font-size: 15px; line-height: 1.6; color: var(--text-2); margin: 0; }

/* ---------- 对比组件 compare ---------- */
.compare {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px; margin: 48px 0; align-items: stretch;
}
.compare-old, .compare-new {
  padding: 32px; border-radius: 20px; position: relative;
}
.compare-old { background: #F1F5F9; }
.compare-new { background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%); color: #fff; }
.compare-eyebrow {
  font-size: 11px; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; margin-bottom: 16px;
}
.compare-old .compare-eyebrow { color: #94A3B8; }
.compare-new .compare-eyebrow { color: rgba(255,255,255,0.55); }
.compare-title { font-size: 22px; font-weight: 700; margin-bottom: 20px; line-height: 1.3; }
.compare-old .compare-title { color: var(--text); }
.compare-new .compare-title { color: #fff; }
.compare-list { list-style: none; padding: 0; margin: 0; }
.compare-list li {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 14px; line-height: 1.5; margin-bottom: 12px;
}
.compare-old .compare-list li { color: var(--text-2); }
.compare-new .compare-list li { color: rgba(255,255,255,0.85); }
.compare-list li::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  margin-top: 8px; flex: none;
}
.compare-old .compare-list li::before { background: #94A3B8; }
.compare-new .compare-list li::before { background: #60A5FA; }

/* ---------- 流程组件 flow ---------- */
.flow-row {
  display: flex; align-items: center; gap: 0;
  margin: 32px 0; flex-wrap: wrap; justify-content: center;
}
.flow-step {
  padding: 14px 22px; background: #F5F5F7;
  border-radius: 12px; font-size: 14px; font-weight: 600;
  color: var(--text); white-space: nowrap;
}
.flow-step.flow-step-primary { background: var(--accent, #0066CC); color: #fff; }
.flow-arrow {
  width: 36px; display: flex; align-items: center; justify-content: center;
  color: var(--text-3); font-size: 16px;
}

/* ---------- 概念 SVG 容器 ---------- */
.concept-art {
  display: flex; align-items: center; justify-content: center;
  margin: 56px auto 0; padding: 16px;
  max-width: 420px;
}
.concept-art svg { width: 100%; height: auto; display: block; }

/* ---------- icon-card（双列布局）---------- */
.icon-card-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 16px; margin: 32px 0;
}
.icon-card {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 24px 28px; background: #fff;
  border-radius: 16px; border: 1px solid rgba(15,23,42,0.05);
  transition: all 300ms;
}
.icon-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(15,23,42,0.06);
}
.icon-card-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,102,204,0.08); color: var(--accent, #0066CC);
  flex: none;
}
.icon-card-icon.icon-1 { background: rgba(99,102,241,0.08); color: #6366F1; }
.icon-card-icon.icon-2 { background: rgba(8,145,178,0.08); color: #0891B2; }
.icon-card-icon.icon-3 { background: rgba(5,150,105,0.08); color: #059669; }
.icon-card-content { flex: 1; min-width: 0; }
.icon-card-title { font-size: 16px; font-weight: 700; margin: 0 0 6px; color: var(--text); }
.icon-card-body { font-size: 14px; line-height: 1.6; color: var(--text-2); margin: 0; }

/* ---------- mobile ---------- */
@media (max-width: 720px) {
  .compare { grid-template-columns: 1fr; }
  .icon-card-grid { grid-template-columns: 1fr; }
  .bignum-row { grid-template-columns: 1fr; gap: 20px; }
  .bignum-num { font-size: 72px; }
  .bignum-content { padding-left: 0; border-left: none; border-top: 1px solid rgba(15,23,42,0.08); padding-top: 20px; }
  .step-block { padding: 20px 24px; gap: 16px; }
  .callout-inner { padding: 24px 28px; }
  .callout-body { font-size: 20px; }
  .spotlight { padding: 40px 28px; }
  .spotlight-quote { font-size: 24px; }
}

/* pace 流程链行内强调 */
.pace-chain-inline { color: var(--accent, #0066CC); font-weight: 700; }

/* ==========================================================================
   Hero 优化 v3：流程胶囊链 + 每页机制图（视觉锚点）
   ========================================================================== */
.flow-chain {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; flex-wrap: wrap;
  margin: 28px auto 0; max-width: 780px;
}
.flow-chain .fc-node {
  display: inline-flex; align-items: baseline; gap: 7px;
  padding: 9px 18px; background: #fff;
  border: 1.5px solid var(--fc-c, #0066CC);
  border-radius: 999px;
  font-size: 14px; font-weight: 600; color: var(--text);
  box-shadow: 0 2px 10px rgba(15,23,42,0.05);
}
.flow-chain .fc-letter {
  font-family: ui-monospace, "SF Mono", monospace;
  color: var(--fc-c, #0066CC);
  font-weight: 800; font-size: 14px;
}
.flow-chain .fc-arrow { color: var(--text-3); font-size: 15px; font-weight: 600; }

.hero-visual {
  display: flex; align-items: flex-end; justify-content: center;
  gap: 14px; margin: 30px auto 0; max-width: 680px; height: 74px;
}

/* 分级阶梯（vocabulary） */
.hv-ladder { gap: 18px; }
.hv-ladder .hv-rung { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.hv-ladder .hv-bar {
  width: 56px; height: var(--h, 30px);
  border-radius: 8px 8px 4px 4px;
  background: linear-gradient(180deg, rgba(0,102,204,0.65), rgba(0,102,204,0.25));
}
.hv-ladder .hv-cap { font-size: 12px; color: var(--text-2); font-weight: 600; }

/* 三维评分示意（dictionary） */
.hv-scores { gap: 30px; }
.hv-scores .hv-rung { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.hv-scores .hv-bar {
  width: 46px; height: var(--h, 40px);
  border-radius: 10px 10px 4px 4px;
  background: linear-gradient(180deg, rgba(124,58,237,0.60), rgba(124,58,237,0.22));
}
.hv-scores .hv-cap { font-size: 12px; color: var(--text-2); font-weight: 600; }

/* 四模块圆环（analytics） */
.hv-rings { align-items: center; gap: 38px; height: 86px; }
.hv-rings .hv-ring-wrap { display: flex; flex-direction: column; align-items: center; gap: 9px; }
.hv-ring {
  width: 52px; height: 52px; border-radius: 50%;
  background: conic-gradient(var(--rc, #0066FF) var(--p, 65%), rgba(15,23,42,0.06) 0);
  -webkit-mask: radial-gradient(circle, transparent 57%, #000 59%);
  mask: radial-gradient(circle, transparent 57%, #000 59%);
}
.hv-rings .hv-cap { font-size: 12px; color: var(--text-2); font-weight: 600; }

/* 32 类点阵（grammar） */
.hv-grid {
  display: grid; grid-template-columns: repeat(16, 1fr);
  gap: 5px; height: 46px; align-items: stretch; max-width: 560px; width: 100%;
}
.hv-grid .hv-cell { background: rgba(15,23,42,0.07); border-radius: 3px; }
.hv-grid .hv-cell.on { background: #7C3AED; }

/* 声波（pronunciation） */
.hv-wave { align-items: center; gap: 5px; height: 58px; }
.hv-wave .hv-bar-w {
  width: 6px; height: var(--h, 20px); border-radius: 3px;
  background: linear-gradient(180deg, #DB2777, rgba(219,39,119,0.30));
}

/* 卷面配比（exam-hall） */
.hv-paper {
  flex-direction: column; align-items: center; gap: 12px;
  height: auto; max-width: 560px; width: 100%;
}
.hv-paper .hv-stack { display: flex; width: 100%; height: 26px; border-radius: 8px; overflow: hidden; }
.hv-paper .hv-seg { height: 100%; }
.hv-paper .hv-legend { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; }
.hv-paper .hv-leg { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-2); font-weight: 600; }
.hv-paper .hv-dot { width: 8px; height: 8px; border-radius: 2px; background: var(--lc, #94A3B8); }

/* 对话气泡（grammar-academy） */
.hv-chat { align-items: center; gap: 16px; height: auto; max-width: 520px; }
.hv-chat .hv-bubble {
  width: 150px; padding: 14px 16px; border-radius: 16px;
  display: flex; flex-direction: column; gap: 7px;
}
.hv-chat .hv-bubble.left {
  background: #fff; border: 1px solid rgba(15,23,42,0.08);
  border-bottom-left-radius: 4px;
  box-shadow: 0 2px 10px rgba(15,23,42,0.04);
}
.hv-chat .hv-bubble.right {
  background: rgba(109,40,217,0.08); border: 1px solid rgba(109,40,217,0.16);
  border-bottom-right-radius: 4px;
}
.hv-chat .hv-line { height: 7px; border-radius: 4px; background: rgba(15,23,42,0.10); }
.hv-chat .hv-line.short { width: 60%; }
.hv-chat .hv-line.mid { width: 82%; }

@media (max-width: 720px) {
  .flow-chain { gap: 6px; }
  .flow-chain .fc-node { padding: 7px 12px; font-size: 13px; }
  .flow-chain .fc-letter { font-size: 13px; }
  .hero-visual { transform: scale(0.85); margin-top: 22px; }
}

/* ===== 机制场景条（三格 SVG） ===== */
.mech-strip {
  display: grid; grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch; gap: 12px;
  margin: 44px auto 0; max-width: 880px;
}
.mech-strip--4 { grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; max-width: 1060px; }
.mech-strip--4 .mech-card svg { max-width: 150px; }
.mech-card {
  background: var(--tint-bg, #F1F5F9); border: 1px solid var(--tint-line, rgba(0,0,0,0.06)); border-radius: 20px;
  padding: 20px 16px 16px; text-align: center; position: relative; overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.65);
  transition: transform 0.25s ease-out, box-shadow 0.25s ease-out;
}
.mech-card:hover { transform: translateY(-2px); background: var(--tint-bg-hover, var(--tint-bg, #F1F5F9)); box-shadow: 0 10px 32px var(--tint-glow, rgba(0,0,0,0.08)), inset 0 1px 0 rgba(255,255,255,0.65); }

/* mech-card 流程四色循环（蓝→薄荷→紫→琥珀） */
.mech-strip .mech-card:nth-of-type(4n+1) { --tint-bg:#EDF3FF; --tint-bg-hover:#E1EDFF; --tint-line:rgba(0,102,255,0.16);  --tint-glow:rgba(0,102,255,0.16); --accent:#0040CC; }
.mech-strip .mech-card:nth-of-type(4n+2) { --tint-bg:#E7F7F1; --tint-bg-hover:#DBF2E8; --tint-line:rgba(16,185,129,0.18); --tint-glow:rgba(16,185,129,0.16); --accent:#047857; }
.mech-strip .mech-card:nth-of-type(4n+3) { --tint-bg:#F2ECFF; --tint-bg-hover:#EAE1FF; --tint-line:rgba(124,58,237,0.16); --tint-glow:rgba(124,58,237,0.15); --accent:#6D28D9; }
.mech-strip .mech-card:nth-of-type(4n+4) { --tint-bg:#FFF8E1; --tint-bg-hover:#FFF1CE; --tint-line:rgba(245,158,11,0.20); --tint-glow:rgba(245,158,11,0.17); --accent:#B45309; }
.mech-strip .mech-card .mech-label { color: var(--accent, var(--text)); }
.mech-card svg { width: 100%; max-width: 180px; height: auto; display: block; margin: 0 auto; }
.mech-label { margin-top: 10px; font-size: 14px; font-weight: 600; color: var(--text, #1D1D1F); }
.mech-arrow { align-self: center; font-size: 22px; color: rgba(0,0,0,0.28); line-height: 1; }

@media (max-width: 820px) {
  .mech-strip { grid-template-columns: 1fr; max-width: 320px; gap: 8px; }
  .mech-arrow { transform: rotate(90deg); padding: 2px 0; }
}

/* ===== Hero 练习流水线（首页门面） ===== */
.pl-wrap { max-width: 980px; margin: 12px auto 72px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.pl-svg { width: 100%; min-width: 800px; display: block; height: auto; }
/* ===== 手机版：Bento 网格（深色流程卡 + 毛玻璃能力格） ===== */
.pl-flow { display: none; }
.plf-flow-card {
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
  background: linear-gradient(165deg, #20232B 0%, #0D0F14 100%);
  border: 1px solid rgba(255, 255, 255, 0.09); border-radius: 20px;
  padding: 18px 16px 16px;
  box-shadow: 0 14px 34px rgba(10, 12, 18, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.10);
}
.plf-node { display: flex; flex-direction: column; align-items: center; gap: 9px; flex: none; }
.plf-node b { font-size: 12.5px; font-weight: 600; color: rgba(255, 255, 255, 0.92); letter-spacing: -0.01em; white-space: nowrap; }
.plf-node--hub b { color: #4DA3FF; }
.plf-ic { width: 42px; height: 42px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex: none; }
.plf-ic--doc { background: rgba(255, 255, 255, 0.10); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14); }
.plf-ic--doc svg { width: 24px; height: 28px; }
.plf-ic--hub { background: linear-gradient(180deg, #3B9DFF 0%, #0066CC 100%); box-shadow: 0 0 0 4px rgba(59, 157, 255, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.40); }
.plf-ic--hub svg { width: 18px; height: 20px; }
.plf-ic--cup { background: rgba(255, 208, 84, 0.14); box-shadow: inset 0 0 0 1px rgba(255, 208, 84, 0.22); }
.plf-ic--cup svg { width: 22px; height: 25px; }
.plf-arrow {
  flex: 1; max-width: 42px; height: 1.5px; border-radius: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.05));
}
.plf-grid { margin-top: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.plf-cell {
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  backdrop-filter: blur(14px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, 0.80);
  padding: 16px 15px 15px;
  box-shadow: 0 8px 28px rgba(24, 39, 75, 0.07), inset 0 1px 0 rgba(255, 255, 255, 0.90);
}
.plf-gic {
  width: 32px; height: 32px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex: none;
  background: var(--cg); box-shadow: 0 3px 9px var(--cs), inset 0 1px 0 rgba(255, 255, 255, 0.38);
}
.plf-gic svg { width: 17px; height: 17px; }
.plf-cell strong { display: block; font-size: 15px; font-weight: 600; color: #1D1D1F; letter-spacing: -0.01em; margin-top: 12px; }
.plf-cell > span { display: block; font-size: 12.5px; color: rgba(29, 29, 31, 0.52); margin-top: 4px; line-height: 1.55; }
.plf-cell--wide {
  grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 20px 18px; border: none; position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0A84FF 0%, #0066CC 55%, #0053A6 100%);
  box-shadow: 0 10px 28px rgba(0, 102, 204, 0.30), inset 0 1px 0 rgba(255, 255, 255, 0.30);
}
.plf-cell--wide::before {
  content: ''; position: absolute; width: 130px; height: 130px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0) 70%);
  top: -46px; right: -30px; pointer-events: none;
}
.plf-cell--wide .plf-gtx { position: relative; }
.plf-cell--wide .plf-gtx strong { margin-top: 0; font-size: 16px; font-weight: 600; color: #FFFFFF; letter-spacing: -0.01em; }
.plf-cell--wide .plf-gtx span { margin-top: 5px; font-size: 12.5px; color: rgba(255, 255, 255, 0.80); }
.plf-wmark {
  display: flex; flex: none; width: 48px; height: 48px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.16); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.24);
  align-items: center; justify-content: center; position: relative;
}
.plf-wmark svg { width: 25px; height: 25px; }
.pl-cap { font-size: 13px; font-weight: 600; fill: #1D1D1F; }
.pl-cap--blue { fill: #0066CC; font-size: 12.5px; }
.pl-t1 { font-size: 13.5px; font-weight: 600; fill: #1D1D1F; }
.pl-t2 { font-size: 11.5px; fill: #86868B; }
/* 主线画出 */
.pl-main { stroke-dasharray: 200; stroke-dashoffset: 300; animation: plDraw 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards; }
/* 蓝点沿主线滑过 */
.pl-dot { opacity: 0; animation: plDot 1.5s cubic-bezier(0.45, 0, 0.2, 1) 0.4s forwards; }
@keyframes plDot {
  0%   { opacity: 0; transform: translateX(0); }
  12%  { opacity: 1; }
  88%  { opacity: 1; }
  100% { opacity: 0; transform: translateX(166px); }
}
/* 中枢弹出 */
.pl-core { opacity: 0; transform: scale(0.72); transform-origin: center; transform-box: fill-box; animation: plPop 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.55s forwards; }
/* 支线依次点亮 */
.pl-branch { stroke-dasharray: 200; stroke-dashoffset: 170; animation: plDraw 0.45s cubic-bezier(0.22, 1, 0.36, 1) forwards; }
.pl-branch:nth-of-type(2) { animation-delay: 0.85s; }
.pl-branch:nth-of-type(3) { animation-delay: 0.93s; }
.pl-branch:nth-of-type(4) { animation-delay: 1.01s; }
.pl-branch:nth-of-type(5) { animation-delay: 1.09s; }
.pl-branch:nth-of-type(6) { animation-delay: 1.17s; }
/* 节点浮现：书本先出，五节点随后 */
.pl-node { opacity: 0; transform: translateX(-8px); animation: plIn 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards; }
svg > g:nth-of-type(1) { animation-delay: 0.05s; }
svg > g:nth-of-type(3) { animation-delay: 1.08s; }
svg > g:nth-of-type(4) { animation-delay: 1.15s; }
svg > g:nth-of-type(5) { animation-delay: 1.22s; }
svg > g:nth-of-type(6) { animation-delay: 1.29s; }
svg > g:nth-of-type(7) { animation-delay: 1.36s; }
/* 汇聚线淡入 */
.pl-merge { opacity: 0; animation: plFade 0.6s ease 1.6s forwards; }
/* 终点出分 */
.pl-end { opacity: 0; transform: scale(0.6); transform-origin: center; transform-box: fill-box; animation: plPop 0.45s cubic-bezier(0.22, 1, 0.36, 1) 1.85s forwards; }
@keyframes plDraw { to { stroke-dashoffset: 0; } }
@keyframes plPop { to { opacity: 1; transform: scale(1); } }
@keyframes plIn { to { opacity: 1; transform: translateX(0); } }
@keyframes plFade { to { opacity: 1; } }
@media (max-width: 820px) {
  .pl-wrap { margin: 4px auto 52px; overflow: visible; }
  .pl-svg { display: none; }
  .pl-flow { display: block; max-width: 380px; margin: 8px auto 0; }
  .pl-wrap { overflow: visible; }
}
@media (prefers-reduced-motion: reduce) {
  .pl-main, .pl-branch { stroke-dasharray: none; stroke-dashoffset: 0; animation: none; }
  .pl-dot { display: none; }
  .pl-core, .pl-node, .pl-merge, .pl-end { opacity: 1; transform: none; animation: none; }

}

/* 手机端 hero 强制换行点 */
.br-m { display: none; }
@media (max-width: 820px) {
  .br-m { display: inline; }
}

@media (max-width: 820px) {
  .sp-m, .comma-m { display: none; }
}

/* ===== 手机端 hero 整体质感升级（H1/副标/数字条/光晕） ===== */
.hero .container { position: relative; z-index: 1; }
@media (max-width: 820px) {
  .hero { padding-bottom: 72px; overflow: hidden; }
  .hero::before {
    content: ''; position: absolute; z-index: 0; pointer-events: none;
    width: 360px; height: 360px; left: -90px; top: 300px; border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.12), rgba(0, 102, 204, 0) 70%);
    filter: blur(28px);
  }
  .hero::after {
    content: ''; position: absolute; z-index: 0; pointer-events: none;
    width: 320px; height: 320px; right: -80px; top: 780px; border-radius: 50%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.09), rgba(124, 58, 237, 0) 70%);
    filter: blur(28px);
  }
  .hero .display { font-size: clamp(34px, 9.8vw, 44px); line-height: 1.06; letter-spacing: -0.035em; }
  .hero .hero-sub { font-size: 15px; line-height: 1.75; margin-bottom: 28px; color: #6E6E73; }
  .hero-stats {
    max-width: 380px; margin: 0 auto; gap: 10px;
    border-top: none; border-bottom: none;
  }
  .hero-stat {
    border: none; border-right: none; min-height: 0; padding: 14px 6px 12px; border-radius: 16px;
    background: rgba(255, 255, 255, 0.66);
    -webkit-backdrop-filter: blur(14px) saturate(1.5);
    backdrop-filter: blur(14px) saturate(1.5);
    box-shadow: 0 8px 28px rgba(24, 39, 75, 0.07), inset 0 1px 0 rgba(255, 255, 255, 0.90);
  }
  .hero-stat:last-child { border-right: none; }
  .hero-stat .num {
    background: none; -webkit-background-clip: border-box; background-clip: border-box;
    -webkit-text-fill-color: #1D1D1F; color: #1D1D1F;
    font-size: 30px; min-height: 34px; margin-bottom: 4px; letter-spacing: -0.03em;
  }
  .hero-stat .label { font-size: 11px; color: #86868B; }
  .hero-stat-sub { font-size: 10px; color: rgba(29, 29, 31, 0.45); margin-top: 4px; line-height: 1.4; }
}