/* ═══════════════════════════════════════════════════════════════
   智学通 v4 — 现代化教育平台设计系统
   参考: 粉笔教育 / B站课堂 / 慕课网
   ═══════════════════════════════════════════════════════════════ */

/* ── CSS 变量 (Design Tokens) ── */
:root {
  /* 主色系 Indigo */
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
  --primary-gradient-h: linear-gradient(135deg, #4f46e5, #7c3aed);

  /* 辅色系 */
  --accent: #0ea5e9;
  --accent-light: #38bdf8;
  --success: #10b981;
  --success-light: #d1fae5;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --vip-gold: linear-gradient(135deg, #f59e0b, #d97706);

  /* 背景 */
  --bg: #f1f5f9;
  --bg-alt: #f8fafc;
  --bg-dark: #0f172a;
  --bg-dark-secondary: #1e293b;
  --card: #ffffff;
  --card-hover: #fafbff;

  /* 文字 */
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-inverse: #f8fafc;
  --text-on-primary: #ffffff;

  /* 边框 */
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --border-focus: #c7d2fe;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.04);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.15);

  /* 圆角 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 96px;

  /* 排版 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  /* 导航栏 */
  --navbar-height: 64px;
  --navbar-blur: saturate(180%) blur(20px);
}

/* ── 深色主题 ── */
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --bg-dark: #020617;
  --bg-dark-secondary: #1e293b;
  --card: #1e293b;
  --card-hover: #273449;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #334155;
  --border-light: #1e293b;
  --border-focus: #4f46e5;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow: 0 4px 6px rgba(0,0,0,0.3);
  --shadow-md: 0 10px 15px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 25px rgba(0,0,0,0.4);
  --shadow-xl: 0 25px 50px rgba(0,0,0,0.5);
  --navbar-blur: saturate(180%) blur(20px);
}

/* ── 基础 Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }

/* ── 排版 ── */
h1 { font-size: 2.5rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; font-weight: 700; line-height: 1.3; }
h3 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; }
h4 { font-size: 1rem; font-weight: 600; }

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }
  h3 { font-size: 1.1rem; }
}

/* ── 通用组件 ── */

/* 按钮 */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 24px; border: none; border-radius: var(--radius-sm);
  background: var(--primary); color: var(--text-on-primary);
  font-size: .9rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 2px 8px rgba(99,102,241,0.15);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(99,102,241,0.18);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 24px; border: 1.5px solid var(--primary); border-radius: var(--radius-sm);
  background: transparent; color: var(--primary);
  font-size: .9rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition);
}
.btn-outline:hover { background: rgba(99,102,241,0.08); transform: translateY(-1px); }
.btn-outline:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 24px; border: 2px solid rgba(255,255,255,0.5); border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.1); color: #fff;
  font-size: .9rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.8);
  transform: translateY(-1px);
}

.btn-lg { padding: 14px 32px; font-size: 1rem; border-radius: var(--radius); }
.btn-full { width: 100%; }
.btn-sms {
  padding: 8px 16px; border: 1px solid var(--primary); border-radius: var(--radius-xs);
  background: #fff; color: var(--primary); font-size: .82rem; cursor: pointer; white-space: nowrap;
  transition: all var(--transition);
}
.btn-sms:hover { background: #ede9fe; }

/* 输入框 */
.input {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: var(--radius-xs); font-size: .9rem; outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--card); color: var(--text);
}
.input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

/* ── 布局 ── */
.section {
  padding: var(--space-3xl) var(--space-md);
  max-width: 1200px; margin: 0 auto;
}
.section-dark {
  background: var(--bg-dark); color: var(--text-inverse);
  max-width: none;
}
.section-dark .section-title { color: #fff; }

/* ── 免费模拟卷 CTA ── */
.cta-free-mock {
  padding-top: 8px; padding-bottom: 8px;
}
.cta-free-inner {
  display: flex; align-items: center; gap: 18px;
  background: linear-gradient(135deg, var(--bg-gradient-1, #eef2ff), var(--bg-gradient-2, #fdf2f8));
  border: 1px solid var(--border-color, rgba(0,0,0,.08));
  border-radius: var(--radius-lg, 16px);
  padding: 22px 26px;
  box-shadow: 0 4px 20px rgba(79,70,229,.08);
}
.cta-free-icon { font-size: 34px; line-height: 1; flex-shrink: 0; }
.cta-free-text { flex: 1; min-width: 0; }
.cta-free-text h2 { font-size: 17px; font-weight: 600; margin: 0 0 4px; }
.cta-free-text p { font-size: 13px; color: var(--text-muted, #666); margin: 0; }
.cta-free-btn { flex-shrink: 0; white-space: nowrap; }
@media (max-width: 640px) {
  .cta-free-inner { flex-direction: column; text-align: center; }
  .cta-free-btn { width: 100%; }
}

.section-title {
  text-align: center; margin-bottom: var(--space-xl);
  position: relative;
}
.section-title::after {
  content: ''; display: block; width: 60px; height: 4px;
  background: var(--primary-gradient); border-radius: 2px;
  margin: 12px auto 0;
}

.muted { color: var(--text-muted); font-size: .82rem; text-align: center; margin-top: 8px; }

/* ── 导航栏 ── */
.topbar {
  position: sticky; top: 0; z-index: 1000;
  height: var(--navbar-height);
  background: rgba(255,255,255,0.75);
  backdrop-filter: var(--navbar-blur);
  -webkit-backdrop-filter: var(--navbar-blur);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
  transition: background var(--transition), border-color var(--transition);
}
[data-theme="dark"] .topbar {
  background: rgba(15,23,42,0.8);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1280px; margin: 0 auto; padding: 0 var(--space-md);
  height: 100%; gap: var(--space);
}

.logo {
  font-size: 1.25rem; font-weight: 800; letter-spacing: -0.01em;
  background: var(--primary-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 16px; border-radius: var(--radius-xs);
  font-size: .88rem; font-weight: 500; color: var(--text-secondary);
  transition: all var(--transition);
}
.nav-links a:hover {
  color: var(--primary); background: rgba(99,102,241,0.06);
}

/* 搜索框 (导航栏装饰) */
.nav-search {
  position: relative; display: flex; align-items: center;
}
.nav-search input {
  padding: 7px 14px 7px 36px; border: 1px solid var(--border);
  border-radius: var(--radius-full); font-size: .82rem; outline: none;
  width: 200px; background: var(--bg-alt); color: var(--text);
  transition: all var(--transition);
}
.nav-search input:focus {
  border-color: var(--primary); width: 240px;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.08);
}
.nav-search .search-icon {
  position: absolute; left: 12px; pointer-events: none;
  font-size: .85rem; color: var(--text-muted);
}

/* 全局搜索下拉 */
.search-results {
  position: absolute; top: calc(100% + 8px); left: 0; right: 0;
  min-width: 320px; max-width: 420px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  z-index: 1001; display: none; overflow: hidden;
  max-height: 420px; overflow-y: auto;
}
.search-results .search-group {
  padding: 8px 14px; font-size: .72rem; font-weight: 700;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em;
  background: var(--bg-alt); border-bottom: 1px solid var(--border);
}
.search-results .search-group:first-child { border-radius: var(--radius) var(--radius) 0 0; }
.search-results .search-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; border-bottom: 1px solid var(--border-light);
  transition: background var(--transition); cursor: pointer;
}
.search-results .search-item:last-child { border-bottom: none; }
.search-results .search-item:hover { background: var(--bg-alt); }
.search-results .si-icon { font-size: 1.25rem; line-height: 1; }
.search-results .si-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.search-results .si-text strong { font-size: .86rem; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-results .si-text small { font-size: .74rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-results .si-text mark { background: rgba(99,102,241,0.18); color: var(--primary-dark); border-radius: 2px; padding: 0 1px; }
.search-results .search-empty { padding: 18px; text-align: center; color: var(--text-muted); font-size: .84rem; }

/* 主题切换 */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-full);
  border: 1px solid var(--border); background: var(--card);
  font-size: 1.1rem; cursor: pointer;
  transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--primary); transform: scale(1.1); background: rgba(99,102,241,0.08); }

/* 顶部操作区 */
.topbar-actions { display: flex; align-items: center; gap: var(--space-sm); }

.badge-vip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: var(--vip-gold); color: #fff;
  font-size: .8rem; font-weight: 700; cursor: pointer;
  box-shadow: 0 2px 8px rgba(245,158,11,0.3);
  transition: all var(--transition);
  white-space: nowrap;
}
.badge-vip:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245,158,11,0.4);
}

.btn-login {
  padding: 8px 20px; border: 1px solid var(--border);
  border-radius: var(--radius-full); background: var(--card);
  font-size: .84rem; font-weight: 500; color: var(--text);
  transition: all var(--transition); white-space: nowrap;
}
.btn-login:hover { border-color: var(--primary); color: var(--primary); }

/* 汉堡菜单 */
.hamburger {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 36px; height: 36px; padding: 6px; border: none;
  background: none; cursor: pointer; z-index: 1010;
}
.hamburger span {
  display: block; width: 100%; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 移动端菜单面板 */
.mobile-menu {
  display: none; position: fixed; top: var(--navbar-height); left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.98); backdrop-filter: blur(20px);
  z-index: 999; padding: var(--space-md);
  flex-direction: column; gap: var(--space);
  animation: slideDown 0.3s ease;
}
[data-theme="dark"] .mobile-menu {
  background: rgba(15,23,42,0.98);
}
.mobile-menu.show { display: flex; }
.mobile-menu a {
  display: block; padding: 14px 20px; border-radius: var(--radius-sm);
  font-size: 1rem; font-weight: 600; color: var(--text);
  transition: all var(--transition);
}
.mobile-menu a:hover { background: rgba(99,102,241,0.06); color: var(--primary); }

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Hero 区块 ── */
.hero {
  position: relative; overflow: hidden;
  padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  background: linear-gradient(135deg, #312e81 0%, #4f46e5 30%, #6366f1 50%, #8b5cf6 70%, #a78bfa 100%);
  color: #fff; text-align: center;
}
/* 网格纹理 */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
/* 光晕装饰 */
.hero::after {
  content: ''; position: absolute; top: -200px; right: -100px;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(167,139,250,0.3), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-2xl); max-width: 1180px;
  margin: 0 auto; position: relative; z-index: 1;
}
.hero-content { position: relative; z-index: 1; max-width: 600px; flex: 1 1 520px; text-align: left; }
.hero h1 {
  font-size: 3rem; font-weight: 800; letter-spacing: -0.03em;
  margin-bottom: var(--space); line-height: 1.15;
  animation: fadeInUp 0.6s ease; text-align: left;
}
.hero p {
  font-size: 1.15rem; opacity: 0.9; max-width: 520px;
  margin: 0 0 var(--space-lg) 0;
  animation: fadeInUp 0.6s ease 0.1s both; text-align: left;
}

.hero-btns {
  display: flex; gap: var(--space-sm); justify-content: flex-start; flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-stats {
  display: flex; justify-content: flex-start; gap: var(--space-xl);
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-visual {
  flex: 0 0 360px; display: flex; align-items: center; justify-content: center;
  animation: fadeInUp 0.7s ease 0.25s both;
}
.hero-illustration {
  width: 100%; max-width: 360px; height: auto;
  filter: drop-shadow(0 24px 48px rgba(0,0,0,0.18));
}

.stat {
  text-align: center; min-width: 120px;
  padding: var(--space); border-radius: var(--radius);
  background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition);
}
.stat:hover {
  background: rgba(255,255,255,0.18);
  transform: translateY(-2px);
}
.stat strong {
  display: block; font-size: 2rem; font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 4px;
}
.stat span { font-size: .82rem; opacity: 0.8; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes countUp {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ── 分类卡片网格 ── */
.category-grid {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.cat-card {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: var(--space-lg) var(--space-md); gap: var(--space-sm);
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative; overflow: hidden;
  cursor: pointer;
  width: 100%; min-width: 0; box-sizing: border-box;
}
.cat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--primary-gradient);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition-slow);
}
.cat-card:hover::before { transform: scaleX(1); }
.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.cat-icon {
  font-size: 3rem; line-height: 1;
  margin-bottom: 4px;
  transition: transform var(--transition);
}
.cat-card:hover .cat-icon { transform: scale(1.1); }

.cat-card h3 { color: var(--text); }
.cat-card p { color: var(--text-secondary); font-size: .86rem; line-height: 1.4; }

.cat-badge {
  display: inline-block; padding: 3px 12px;
  background: rgba(99,102,241,0.08); color: var(--primary);
  border-radius: var(--radius-full); font-size: .72rem; font-weight: 600;
  margin-top: auto;
}

/* 考试家族色 */
.cat-card.family-civil::before { background: linear-gradient(90deg, #2563eb, #60a5fa); }
.cat-card.family-civil .cat-badge { background: rgba(37,99,235,0.10); color: #2563eb; }
.cat-card.family-edu::before { background: linear-gradient(90deg, #ea580c, #fb923c); }
.cat-card.family-edu .cat-badge { background: rgba(234,88,12,0.10); color: #ea580c; }
.cat-card.family-k12::before { background: linear-gradient(90deg, #0891b2, #22d3ee); }
.cat-card.family-k12 .cat-badge { background: rgba(8,145,178,0.10); color: #0891b2; }
.cat-card.family-build::before { background: linear-gradient(90deg, #d97706, #fbbf24); }
.cat-card.family-build .cat-badge { background: rgba(217,119,6,0.10); color: #d97706; }
.cat-card.family-finance::before { background: linear-gradient(90deg, #059669, #34d399); }
.cat-card.family-finance .cat-badge { background: rgba(5,150,105,0.10); color: #059669; }
.cat-card.family-law::before { background: linear-gradient(90deg, #7c3aed, #a78bfa); }
.cat-card.family-law .cat-badge { background: rgba(124,58,237,0.10); color: #7c3aed; }
.cat-card.family-medical::before { background: linear-gradient(90deg, #e11d48, #fb7185); }
.cat-card.family-medical .cat-badge { background: rgba(225,29,72,0.10); color: #e11d48; }
.cat-card.family-social::before { background: linear-gradient(90deg, #0d9488, #2dd4bf); }
.cat-card.family-social .cat-badge { background: rgba(13,148,136,0.10); color: #0d9488; }
.cat-card.family-tech::before { background: linear-gradient(90deg, #4f46e5, #818cf8); }
.cat-card.family-tech .cat-badge { background: rgba(79,70,229,0.10); color: #4f46e5; }
.cat-card.family-lang::before { background: linear-gradient(90deg, #c026d3, #e879f9); }
.cat-card.family-lang .cat-badge { background: rgba(192,38,211,0.10); color: #c026d3; }
.cat-card.family-skill::before { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.cat-card.family-skill .cat-badge { background: rgba(245,158,11,0.10); color: #f59e0b; }
.cat-card.family-equip::before { background: linear-gradient(90deg, #0ea5e9, #38bdf8); }
.cat-card.family-equip .cat-badge { background: rgba(14,165,233,0.10); color: #0ea5e9; }

/* 两层分类：父分组 + 子 chip */
.cat-group { margin-bottom: var(--space-lg); }
.cat-group-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; background: var(--card);
  border: 1px solid var(--border); border-left: 5px solid var(--primary);
  border-radius: var(--radius-md); cursor: pointer;
  transition: all var(--transition);
}
.cat-group-header:hover { box-shadow: var(--shadow-md); transform: translateX(2px); }
.cat-group.family-civil .cat-group-header { border-left-color: #2563eb; }
.cat-group.family-edu .cat-group-header { border-left-color: #ea580c; }
.cat-group.family-k12 .cat-group-header { border-left-color: #0891b2; }
.cat-group.family-build .cat-group-header { border-left-color: #d97706; }
.cat-group.family-finance .cat-group-header { border-left-color: #059669; }
.cat-group.family-law .cat-group-header { border-left-color: #7c3aed; }
.cat-group.family-medical .cat-group-header { border-left-color: #e11d48; }
.cat-group.family-social .cat-group-header { border-left-color: #0d9488; }
.cat-group.family-tech .cat-group-header { border-left-color: #4f46e5; }
.cat-group.family-lang .cat-group-header { border-left-color: #c026d3; }
.cat-group.family-skill .cat-group-header { border-left-color: #f59e0b; }
.cat-group.family-equip .cat-group-header { border-left-color: #0ea5e9; }
.cg-icon { font-size: 1.5rem; }
.cg-name { font-weight: 700; font-size: 1.05rem; color: var(--text); }
.cg-badge { font-size: .7rem; padding: 2px 10px; border-radius: 99px; background: var(--bg); color: var(--text-muted); }
.cg-count { margin-left: auto; font-size: .78rem; color: var(--text-muted); }
.cg-arrow { color: var(--text-muted); font-size: 1.2rem; }
.cat-chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 8px 4px 22px; }
.cat-chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 14px; background: var(--card);
  border: 1px solid var(--border); border-radius: 99px;
  font-size: .85rem; color: var(--text-secondary); text-decoration: none;
  transition: all var(--transition);
}
.cat-chip:hover { border-color: var(--primary); color: var(--primary); background: rgba(99,102,241,0.06); transform: translateY(-2px); }
.cat-chip.has-wrong { border-color: #fecaca; }
.chip-wrong { font-style: normal; font-size: .7rem; background: #fee2e2; color: #ef4444; padding: 0 6px; border-radius: 99px; }

/* ── 特性网格 ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md); max-width: 1200px;
  margin: 0 auto; padding: 0 var(--space-md);
}

.feature-card {
  text-align: center; padding: var(--space-xl) var(--space-md);
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg); backdrop-filter: blur(8px);
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.15);
}

.feature-icon {
  font-size: 2.5rem; margin-bottom: var(--space);
  display: inline-block; line-height: 1;
}
.feature-card h3 {
  color: #fff; margin-bottom: var(--space-sm);
}
.feature-card p { color: rgba(255,255,255,0.7); font-size: .88rem; }

/* ── 详情页 ── */

/* 面包屑 */
.breadcrumb {
  display: flex; align-items: center; gap: var(--space-sm); flex-wrap: wrap;
  padding: var(--space) var(--space-md); max-width: 1200px; margin: 0 auto;
  font-size: .84rem; color: var(--text-muted);
}
.breadcrumb a { color: var(--primary); font-weight: 500; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text-muted); }

/* 详情页头 */
.detail-header {
  max-width: 1200px; margin: 0 auto; padding: var(--space-lg) var(--space-md) var(--space);
  text-align: center;
}
.detail-header h1 { font-size: 2rem; }
.detail-header .subjects {
  color: var(--text-secondary); font-size: .88rem;
  margin-top: var(--space-sm);
}

/* Tab标签切换 */
.detail-tabs {
  display: flex; gap: 4px; max-width: 1200px; margin: 0 auto;
  padding: 0 var(--space-md) var(--space); overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.detail-tab {
  padding: 10px 20px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--card); font-size: .88rem; font-weight: 500; cursor: pointer;
  color: var(--text-secondary); transition: all var(--transition);
  white-space: nowrap;
}
.detail-tab:hover { border-color: var(--primary); color: var(--primary); }
.detail-tab.active {
  background: var(--primary-gradient); color: #fff;
  border-color: transparent; box-shadow: 0 2px 10px rgba(99,102,241,0.3);
}

.detail-content {
  max-width: 1200px; margin: 0 auto; padding: 0 var(--space-md) var(--space-3xl);
}

/* 模式选择栏 */
.mode-bar {
  display: flex; align-items: center; gap: var(--space-sm); flex-wrap: wrap;
  padding: var(--space-sm) var(--space); background: var(--card);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-xs);
  margin-bottom: var(--space); border: 1px solid var(--border);
}
.mode-btn {
  padding: 7px 16px; border: 1px solid var(--border); border-radius: var(--radius-full);
  background: var(--bg-alt); font-size: .82rem; font-weight: 500;
  color: var(--text-secondary); cursor: pointer;
  transition: all var(--transition);
}
.mode-btn:hover { border-color: var(--primary); color: var(--primary); }
.mode-btn.active {
  background: var(--primary-gradient); color: #fff; border-color: transparent;
  box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}
.lock-badge {
  display: inline-block; margin-left: 6px; font-size: .64rem; line-height: 1;
  background: linear-gradient(135deg, #f59e0b, #f97316); color: #fff;
  padding: 2px 6px; border-radius: 999px; vertical-align: middle; font-weight: 600;
}

/* 答案卡片切换 */
.answer-card-toggle {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 7px 16px; border: 1px solid var(--border); border-radius: var(--radius-full);
  background: var(--card); cursor: pointer; font-size: .82rem;
  color: var(--text-secondary); transition: all var(--transition);
}
.answer-card-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* ── 练习区域 ── */

.quiz-container {
  max-width: 800px; margin: 0 auto;
}

.quiz-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: var(--space-lg);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
}

.quiz-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: var(--space-lg); flex-wrap: wrap; gap: var(--space-sm);
}
.quiz-num {
  font-weight: 700; font-size: .9rem; color: var(--primary);
}
.quiz-type {
  font-size: .78rem; color: var(--text-muted);
  padding: 3px 10px; background: var(--bg-alt);
  border-radius: var(--radius-full);
}
.real-badge {
  font-size: .72rem; color: #059669; font-weight: 700;
  padding: 3px 10px; background: #ecfdf5; border: 1px solid #a7f3d0;
  border-radius: var(--radius-full); white-space: nowrap;
}

.quiz-question {
  font-size: 1.05rem; line-height: 1.7; font-weight: 500;
  margin-bottom: var(--space-lg); padding: var(--space);
  background: var(--bg-alt); border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary);
}

.quiz-options { display: flex; flex-direction: column; gap: var(--space-sm); }

.quiz-option {
  display: flex; align-items: flex-start; gap: var(--space-sm);
  padding: 14px 18px; border: 2px solid var(--border);
  border-radius: var(--radius); cursor: pointer;
  transition: all var(--transition);
  background: var(--card);
  position: relative; overflow: hidden;
}
.quiz-option:hover {
  border-color: var(--primary-light);
  background: rgba(99,102,241,0.02);
  transform: translateX(4px);
}
.quiz-option.selected {
  border-color: var(--primary); background: rgba(99,102,241,0.05);
  box-shadow: 0 0 0 1px var(--primary);
}
.quiz-option.correct {
  border-color: var(--success); background: var(--success-light);
  box-shadow: 0 0 0 1px var(--success);
}
.quiz-option.wrong {
  border-color: var(--danger); background: var(--danger-light);
  box-shadow: 0 0 0 1px var(--danger);
}
.quiz-option .marker {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; min-width: 32px;
  border-radius: var(--radius-xs); background: var(--bg-alt);
  font-size: .82rem; font-weight: 700; color: var(--text-secondary);
}
.quiz-option.selected .marker { background: var(--primary); color: #fff; }
.quiz-option.correct .marker { background: var(--success); color: #fff; }
.quiz-option.wrong .marker { background: var(--danger); color: #fff; }
.quiz-option span { padding-top: 4px; line-height: 1.6; flex: 1; }

/* 解析 */
.explanation {
  margin-top: var(--space); padding: var(--space);
  background: #f0fdf4; border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm); font-size: .86rem; line-height: 1.6;
  display: none;
}
[data-theme="dark"] .explanation { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.2); }
.explanation.show { display: block; animation: fadeInUp 0.3s ease; }

/* 操作按钮 */
.quiz-actions {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: var(--space-lg); gap: var(--space-sm);
}

.btn-prev, .btn-next {
  padding: 10px 20px; border-radius: var(--radius-sm); font-size: .88rem;
  font-weight: 600; cursor: pointer; transition: all var(--transition);
  border: 1px solid var(--border); background: var(--card); color: var(--text);
}
.btn-prev:hover, .btn-next:hover {
  border-color: var(--primary); color: var(--primary);
}

.btn-submit {
  padding: 10px 28px; border: none; border-radius: var(--radius-sm);
  font-size: .88rem; font-weight: 700; cursor: pointer;
  background: var(--primary-gradient); color: #fff;
  box-shadow: 0 4px 16px rgba(99,102,241,0.35);
  transition: all var(--transition);
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(99,102,241,0.45);
}

/* 进度条 */
.quiz-progress {
  margin-top: var(--space); background: var(--border);
  border-radius: 3px; height: 6px; overflow: hidden;
}
.quiz-progress-fill {
  height: 100%; background: var(--primary-gradient);
  border-radius: 3px; transition: width 0.4s ease;
}

/* ── 成绩卡片 ── */
.score-card {
  max-width: 600px; margin: 0 auto; text-align: center;
  padding: var(--space-xl); background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-md);
  animation: fadeInUp 0.5s ease;
}

.score-num {
  font-size: 4rem; font-weight: 800; letter-spacing: -0.03em;
  background: var(--primary-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1; margin-bottom: var(--space-sm);
}

.score-detail {
  display: inline-flex; gap: var(--space); flex-wrap: wrap;
  justify-content: center; font-size: .9rem;
  color: var(--text-secondary); margin-bottom: var(--space);
}
.score-detail strong { color: var(--text); }

/* ── 错题本 ── */
.wrong-book-section {
  margin: var(--space-lg) auto; max-width: 1100px;
  padding: var(--space-lg); background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.wrong-book-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: var(--space);
}
.wrong-book-header h3 { font-size: 1.1rem; }

.btn-clear-wrong {
  font-size: .78rem; color: var(--danger); background: none;
  border: 1px solid #fecaca; padding: 6px 14px; border-radius: var(--radius-full);
  cursor: pointer; transition: all var(--transition);
}
.btn-clear-wrong:hover { background: var(--danger-light); }

.wrong-book-list .wrong-book-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 18px; background: var(--bg-alt); border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm); border: 1px solid var(--border);
  font-size: .84rem; transition: all var(--transition);
  flex-wrap: wrap; gap: var(--space-sm);
}
.wrong-book-item:hover { border-color: var(--primary); }

.wrong-book-item .subject-tag {
  font-size: .7rem; background: #ede9fe; color: var(--primary);
  padding: 2px 8px; border-radius: 8px; white-space: nowrap;
}

.wrong-book-item .wrong-count { font-weight: 700; color: var(--danger); }

.btn-retry {
  font-size: .78rem; padding: 6px 16px; border: none; border-radius: var(--radius-full);
  background: var(--primary-gradient); color: #fff;
  cursor: pointer; transition: all var(--transition);
  white-space: nowrap; text-decoration: none;
}
.btn-retry:hover { box-shadow: 0 4px 12px rgba(99,102,241,0.25); transform: translateY(-1px); }

/* 错题回顾 */
.wrong-list { max-width: 800px; margin: 0 auto; }
.wrong-list h3 { text-align: center; margin-bottom: var(--space); }
.wrong-list-item {
  padding: var(--space); background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: var(--space-sm);
  border-left: 4px solid var(--danger);
}
.wrong-list-item .q { font-weight: 600; margin-bottom: var(--space-xs); }
.wrong-list-item .a, .wrong-list-item .c { margin-right: var(--space-sm); }

/* ── 视频卡片网格 ── */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-md);
}

.video-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  cursor: pointer; transition: all var(--transition);
  box-shadow: var(--shadow-xs);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.video-thumb {
  position: relative; width: 100%; padding-top: 56.25%; /* 16:9 */
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.video-thumb span { position: absolute; font-size: 3rem; transition: transform var(--transition); }
.video-card:hover .video-thumb span { transform: scale(1.1); }

.play-icon {
  position: absolute; width: 52px; height: 52px;
  border-radius: 50%; background: rgba(0,0,0,0.65);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.2rem;
  opacity: 0; transform: scale(0.8);
  transition: all var(--transition);
  backdrop-filter: blur(4px);
}
.video-card:hover .play-icon { opacity: 1; transform: scale(1); }

.video-info { padding: var(--space); }
.video-info h4 {
  font-size: .92rem; line-height: 1.5; margin-bottom: var(--space-sm);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-src-line {
  font-size: .74rem; color: #2563eb; line-height: 1.4;
  margin: 0 0 6px; word-break: break-all;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.video-meta {
  display: flex; justify-content: space-between; align-items: center;
  font-size: .78rem; color: var(--text-muted);
}
.video-lock {
  padding: 2px 8px; background: var(--warning-light);
  color: #92400e; border-radius: var(--radius-xs);
  font-size: .7rem; font-weight: 600;
}

/* ===== 继续学习 ===== */
.continue-learning { max-width: 1200px; margin: 0 auto var(--space-lg); }

.continue-card {
  display: flex; align-items: center; gap: var(--space);
  padding: var(--space) var(--space-md); flex-wrap: wrap;
  background: linear-gradient(135deg, #e0e7ff, #f5f3ff);
  border-radius: var(--radius-lg); border: 1px solid #c7d2fe;
  border-left: 5px solid var(--primary);
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .continue-card {
  background: linear-gradient(135deg, #312e81, #1e1b4b);
  border-color: #4f46e5;
}
[data-theme="dark"] .pitfalls-card { background:#291b05; border-color:#78350f; }
[data-theme="dark"] .pitfalls-card h3 { color:#fbbf24; }
[data-theme="dark"] .pdf-reader-banner { background:linear-gradient(135deg,#1e1b4b,#312e81); border-color:#4f46e5; }
[data-theme="dark"] .passrate-table th { background:#1e293b; }
[data-theme="dark"] .passrate-table td { background:#0f172a; }

.continue-card .c-icon { font-size: 2.5rem; line-height: 1; }
.continue-card .c-info { flex: 1; min-width: 200px; }
.continue-card .c-info strong { font-size: 1rem; }
.continue-card .c-info p {
  font-size: .82rem; color: var(--text-secondary); margin-top: 4px;
}
.continue-card .c-progress { width: 80px; height: 80px; }

.btn-continue {
  padding: 10px 24px; border: none; border-radius: var(--radius-full);
  background: var(--primary-gradient); color: #fff;
  font-size: .86rem; font-weight: 600; cursor: pointer;
  text-decoration: none; white-space: nowrap;
  transition: all var(--transition);
  box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}
.btn-continue:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.4);
}

/* ── 弹窗 (登录 / 视频播放器) ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1100;
  background: rgba(0,0,0,0.5); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 0.2s ease;
}
.modal-box {
  background: var(--card); border-radius: var(--radius-xl);
  padding: var(--space-xl); width: 92%; max-width: 400px;
  box-shadow: var(--shadow-xl); text-align: center;
  position: relative; animation: scaleIn 0.3s ease;
}
.modal-box h2 { margin-bottom: var(--space-lg); }
.modal-box label {
  display: block; text-align: left; font-size: .84rem;
  font-weight: 600; margin-bottom: 6px; color: var(--text-secondary);
}
.modal-box .input { margin-bottom: var(--space); }

.sms-row {
  display: flex; gap: var(--space-sm); margin-bottom: var(--space);
}

.modal-close {
  position: absolute; top: 12px; right: 16px;
  width: 32px; height: 32px; border-radius: 50%; border: none;
  background: var(--bg-alt); font-size: 1.1rem; cursor: pointer;
  color: var(--text-secondary); transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { background: var(--danger-light); color: var(--danger); }

/* 视频播放器弹窗 */
.video-player-modal {
  position: fixed; inset: 0; z-index: 1100;
  background: rgba(0,0,0,0.8); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 0.3s ease;
}
.video-player-box {
  width: 92%; max-width: 900px; position: relative;
  border-radius: var(--radius-lg); overflow: hidden;
  background: #000; box-shadow: var(--shadow-xl);
}
.video-player-box iframe {
  width: 100%; height: 500px; border: none; display: block;
}
.video-player-close {
  position: absolute; top: 12px; right: 16px; z-index: 10;
  width: 36px; height: 36px; border-radius: 50%; border: none;
  background: rgba(0,0,0,0.6); color: #fff;
  font-size: 1.2rem; cursor: pointer; backdrop-filter: blur(4px);
  transition: all var(--transition);
}
.video-player-close:hover { background: rgba(239,68,68,0.8); }

.paywall-overlay {
  position: absolute; inset: 0; display: flex;
  flex-direction: column; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.7); color: #fff;
  text-align: center; padding: var(--space-md);
  backdrop-filter: blur(6px);
}
.paywall-overlay h3 { font-size: 1.3rem; margin-bottom: var(--space-sm); }
.paywall-overlay p { font-size: .88rem; opacity: 0.8; margin-bottom: var(--space); }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* ── Toast 通知 ── */
.toast {
  position: fixed; top: 80px; left: 50%; transform: translateX(-50%);
  background: var(--bg-dark-secondary); color: #fff; padding: 10px 24px;
  border-radius: var(--radius-full); font-size: .84rem; z-index: 1200;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(-12px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── 答题卡 ── */
.answer-card {
  display: none; flex-wrap: wrap; gap: 8px;
  padding: var(--space); background: var(--card);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-xs);
  margin-bottom: var(--space); border: 1px solid var(--border);
}
.answer-card.show { display: flex; animation: fadeInUp 0.3s ease; }

.answer-dot {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .78rem; font-weight: 600; cursor: pointer;
  border: 2px solid var(--border); background: var(--card);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.answer-dot.answered {
  background: var(--primary-gradient); color: #fff; border-color: transparent;
}
.answer-dot.current {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
  font-weight: 700; transform: scale(1.1);
}
.answer-dot:hover { border-color: var(--primary); transform: scale(1.15); }

/* ── 搜索/筛选栏 ── */
.search-bar {
  display: flex; gap: var(--space-sm); margin-bottom: var(--space);
  align-items: center; flex-wrap: wrap;
}

.search-input {
  flex: 1; min-width: 180px; padding: 10px 18px;
  border: 1px solid var(--border); border-radius: var(--radius-full);
  font-size: .88rem; outline: none; background: var(--card);
  color: var(--text); transition: all var(--transition);
}
.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.08);
}

.subject-filter {
  padding: 8px 18px; border: 1px solid var(--border);
  border-radius: var(--radius-full); font-size: .84rem;
  background: var(--card); cursor: pointer; outline: none;
  min-width: 130px; color: var(--text);
}
.subject-filter:focus { border-color: var(--primary); }

/* ── 计时器 ── */
.timer-bar {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: 10px 18px; background: var(--card); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-xs); margin-bottom: var(--space);
  font-size: .88rem; border: 1px solid var(--border);
}
.timer-bar.warning {
  background: var(--danger-light); border-color: #fecaca;
}
.timer-clock {
  font-weight: 700; font-variant-numeric: tabular-nums; font-size: 1.1rem;
  font-family: var(--font-mono);
}
.timer-clock.warning { color: var(--danger); animation: pulse 1s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── 科目正确率条 ── */
.subject-bars { margin-top: var(--space-sm); }
.subject-bar-row {
  display: flex; align-items: center; gap: var(--space-sm); margin-bottom: 6px;
  font-size: .82rem;
}
.subject-bar-label {
  width: 80px; text-align: right; color: var(--text-secondary);
  font-weight: 500; font-size: .78rem;
}
.subject-bar-track {
  flex: 1; height: 8px; background: var(--border);
  border-radius: 4px; overflow: hidden;
}
.subject-bar-fill {
  height: 100%; border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.subject-bar-pct {
  width: 40px; text-align: left; font-weight: 700;
  font-size: .78rem;
}

/* ── 页脚 ── */
.footer {
  padding: var(--space-xl) var(--space-md);
  border-top: 1px solid var(--border); background: var(--card);
}
.footer-inner {
  display: flex; gap: var(--space-xl); flex-wrap: wrap;
  max-width: 1200px; margin: 0 auto var(--space-lg);
}
.footer-col { display: flex; flex-direction: column; gap: var(--space-sm); min-width: 100px; }
.footer-col strong { color: var(--text); font-size: .88rem; margin-bottom: 4px; }
.footer-col a {
  font-size: .82rem; color: var(--text-muted); transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary); }
.footer-cat-list { display: flex; flex-wrap: wrap; gap: 4px 14px; max-width: 520px; }
.footer-cat-list a { font-size: .8rem; color: var(--text-muted); }
.mobile-cat-list { display: flex; flex-direction: column; }
.mobile-cat-list a { padding: 12px 14px; color: var(--text); border-radius: 10px; }

.footer-copy {
  text-align: center; font-size: .78rem; color: var(--text-muted);
}

/* ── 页面过渡动画 ── */
.page-enter {
  animation: fadeInUp 0.35s ease;
}

/* ── 键盘快捷键提示 ── */
.keyboard-hint {
  display: inline-block; padding: 2px 6px; margin-left: 6px;
  border: 1px solid var(--border); border-radius: 4px;
  font-size: .68rem; background: var(--bg-alt);
  font-family: var(--font-mono); color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════════
   响应式断点
   ═══════════════════════════════════════════════════════════════ */

/* 平板及以下 (≤1024px) */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.2rem; }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
}

/* 手机端 (≤768px) */
@media (max-width: 768px) {
  :root {
    --navbar-height: 56px;
    --space-3xl: 48px;
    --space-2xl: 40px;
  }

  /* 导航栏 */
  .nav-links, .nav-search, .topbar-actions .badge-vip {
    display: none;
  }
  .hamburger { display: flex; }

  /* Hero */
  .hero { padding: var(--space-2xl) var(--space); }
  .hero-inner { flex-direction: column; gap: var(--space-xl); }
  .hero-content { text-align: center; max-width: 100%; }
  .hero h1 { font-size: 1.6rem; text-align: center; }
  .hero p { font-size: .95rem; text-align: center; margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-stats { justify-content: center; gap: var(--space-sm); }
  .hero-visual { flex: 0 0 auto; width: 100%; max-width: 280px; }
  .stat { min-width: 90px; padding: var(--space-sm); }
  .stat strong { font-size: 1.4rem; }

  /* 通用 */
  .section { padding: var(--space-2xl) var(--space); }
  .section-title { margin-bottom: var(--space-lg); }

  /* 分类卡片 */
  .category-grid {
    grid-template-columns: repeat(2, 1fr); gap: var(--space-sm);
  }
  .cat-card { padding: var(--space) var(--space-sm); width: 100%; min-width: 0; box-sizing: border-box; }
  .cat-icon { font-size: 2.2rem; }

  /* 视频网格 */
  .video-grid {
    grid-template-columns: 1fr; max-width: 400px; margin: 0 auto;
  }

  /* 题目卡片 */
  .quiz-card { padding: var(--space); }
  .quiz-question { font-size: .95rem; }
  .quiz-option { padding: 12px 14px; }

  /* 模式栏 */
  .mode-bar { gap: 4px; }
  .mode-btn { padding: 6px 12px; font-size: .76rem; }

  /* 成绩 */
  .score-num { font-size: 3rem; }

  /* 面包屑 */
  .breadcrumb { font-size: .78rem; }

  /* 视频弹窗 */
  .video-player-box iframe { height: 280px; }

  /* 继续学习卡片 */
  .continue-card { flex-direction: column; text-align: center; }
  .continue-card .c-info { text-align: center; }
}

/* 小屏手机 (≤480px) */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.35rem; }
  .hero p { font-size: .86rem; }

  .category-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
  .features-grid { grid-template-columns: 1fr; }

  .detail-tabs { flex-wrap: nowrap; }
  .detail-tab { padding: 8px 14px; font-size: .8rem; }

  .mode-bar { flex-direction: column; align-items: stretch; }
  .mode-btn { text-align: center; }

  .quiz-options { gap: 6px; }
  .quiz-option { padding: 10px 12px; }

  .footer-inner { gap: var(--space); }
  .footer-col { min-width: 80px; }
}

/* === SKELETON LOADING === */
.skeleton {
  background: linear-gradient(90deg, #e5e7eb 25%, #f3f4f6 50%, #e5e7eb 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}
.skeleton-card { height: 120px; border-radius: 12px; margin-bottom: 12px; }
.skeleton-text { height: 14px; margin-bottom: 8px; width: 80%; }
.skeleton-text:last-child { width: 60%; }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

/* === PAGE TRANSITION === */
.page-enter { animation: pageEnter 0.35s ease both; }
@keyframes pageEnter {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* === 会员中心 === */
.member-status {
  text-align: center; font-size: .95rem; color: var(--text-muted);
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 12px 16px; margin-bottom: var(--space-lg);
}
.member-status.ok { color: var(--success); border-color: var(--success); background: color-mix(in srgb, var(--success) 8%, var(--card)); }
.vip-title { text-align: center; font-size: 1.5rem; margin: 8px 0 var(--space-xl); }
.vip-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md);
  max-width: 1040px; margin: 0 auto;
}
.vip-card {
  position: relative; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: var(--space-lg) var(--space);
  display: flex; flex-direction: column; align-items: center; text-align: center;
  box-shadow: var(--shadow-sm); transition: transform .2s, box-shadow .2s;
}
.vip-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.vip-card.free { opacity: .92; }
.vip-card.hot { border: 2px solid var(--primary); box-shadow: 0 8px 24px rgba(99,102,241,.18); }
.vip-flag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff; font-size: .72rem; font-weight: 700;
  padding: 3px 12px; border-radius: 999px;
}
.vip-name { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.vip-price { font-size: 2rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
.vip-price .vip-period { font-size: .9rem; font-weight: 600; color: var(--text-muted); margin-left: 2px; }
.vip-feats { list-style: none; padding: 0; margin: var(--space) 0; width: 100%; text-align: left; }
.vip-feats li {
  font-size: .85rem; color: var(--text-secondary); padding: 6px 0 6px 22px;
  position: relative; border-bottom: 1px dashed var(--border);
}
.vip-feats li:last-child { border-bottom: none; }
.vip-feats li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 700; }
.vip-btn {
  display: inline-block; margin-top: auto; width: 100%;
  padding: 10px 0; border-radius: var(--radius-md); font-weight: 700; font-size: .92rem;
  text-decoration: none; background: var(--primary); color: #fff; transition: filter .2s;
}
.vip-btn:hover { filter: brightness(1.08); }
.vip-btn.disabled, .vip-btn:disabled { background: var(--border); color: var(--text-muted); cursor: default; }

.pay-box {
  max-width: 1040px; margin: var(--space-2xl) auto 0;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.pay-box h3 { margin-bottom: var(--space-lg); }
.pay-steps { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
.pay-step { display: flex; gap: var(--space); }
.ps-num {
  flex: 0 0 32px; width: 32px; height: 32px; border-radius: 50%;
  background: var(--primary); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.ps-txt { flex: 1; }
.ps-txt strong { font-size: 1rem; }
.ps-txt p { font-size: .86rem; color: var(--text-muted); margin: 6px 0 12px; }
.alipay-qr { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.alipay-qr-img { max-width: 260px; width: 100%; border-radius: 12px; box-shadow: 0 4px 16px rgba(0,0,0,.15); background: #fff; }
.qr-placeholder {
  width: 180px; height: 180px; border: 2px dashed var(--border); border-radius: 12px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; color: var(--text-muted); font-size: .95rem; line-height: 1.6;
  background: var(--bg);
}
.qr-placeholder span { font-size: .78rem; opacity: .8; }
.qr-note { font-size: .76rem; color: var(--text-muted); text-align: center; }
.qr-note code { background: var(--bg); padding: 2px 6px; border-radius: 4px; font-size: .72rem; }
.key-exchange { display: flex; gap: 8px; }
.key-input {
  flex: 1; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-md);
  font-size: .92rem; background: var(--bg); color: var(--text);
}
.key-input:focus { outline: none; border-color: var(--primary); }
.key-msg { font-size: .84rem; margin-top: 10px; min-height: 1.2em; }
.key-msg.ok { color: var(--success); }
.key-msg.err { color: #ef4444; }
.key-msg.loading { color: #3b82f6; }
.vip-foot { max-width: 1040px; margin: var(--space-lg) auto 0; font-size: .78rem; color: var(--text-muted); text-align: center; line-height: 1.7; }

/* 顶栏会员徽章激活态 */
.badge-vip.is-member { background: linear-gradient(135deg, #f59e0b, #fbbf24); color: #fff; border-color: transparent; }

/* 响应式 */
@media (max-width: 1024px) {
  .vip-grid { grid-template-columns: repeat(2, 1fr); }
  .pay-steps { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .vip-grid { grid-template-columns: 1fr; }
  .pay-box { padding: var(--space-lg); }
  .vip-price { font-size: 1.7rem; }
}

/* === SCROLL REVEAL === */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* === PRINT FRIENDLY === */
@media print {
  .topbar, .footer, .mobile-menu, .modal-overlay, .nav-search, .topbar-actions { display: none !important; }
  body { background: white !important; color: black !important; }
  .quiz-card { border: 1px solid #ccc !important; page-break-inside: avoid; }
}

/* === ACCESSIBILITY === */
:focus-visible { outline: 2px solid var(--primary, #6366f1); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* === 学习闭环 & 六维内容 === */

/* 书籍推荐 */
.books-list { display:grid; gap:12px; }
.book-card { display:flex; gap:14px; padding:16px; background:var(--card); border:1px solid var(--border); border-radius:var(--radius-sm); align-items:flex-start; }
.book-num { flex:0 0 32px; height:32px; display:flex; align-items:center; justify-content:center; background:var(--primary); color:#fff; border-radius:50%; font-weight:700; font-size:.9rem; }
.book-info h4 { font-size:1rem; margin-bottom:6px; line-height:1.35; }
.book-meta { font-size:.82rem; color:var(--text-muted); margin-bottom:4px; }
.book-note { font-size:.8rem; color:var(--text-muted); }
.pdf-reader-banner {
  display:flex; align-items:center; gap:16px;
  padding:16px; margin-bottom:14px;
  background:linear-gradient(135deg, #eef2ff 0%, #f5f3ff 100%);
  border:1px solid var(--border); border-radius:var(--radius-sm);
}
.pdf-reader-icon { font-size:2.2rem; flex:0 0 auto; }
.pdf-reader-info { flex:1; }
.pdf-reader-info h4 { font-size:1rem; margin-bottom:4px; }
.pdf-reader-info p { font-size:.84rem; color:var(--text-muted); }
.pdf-reader-btn { flex:0 0 auto; white-space:nowrap; text-decoration:none; }
.book-find {
  display:flex; flex-wrap:wrap; gap:8px; margin-top:10px;
}
.book-find-link {
  display:inline-flex; align-items:center; justify-content:center;
  padding:5px 12px; font-size:.8rem; font-weight:600;
  color:var(--primary);
  background:color-mix(in srgb, var(--primary) 12%, transparent);
  border:1px solid color-mix(in srgb, var(--primary) 35%, transparent);
  border-radius:999px; text-decoration:none;
  transition:all var(--transition);
}
.book-find-link:hover { background:var(--primary); color:#fff; border-color:var(--primary); }

/* 避坑指南 */
.pitfalls-card { background:#fffbeb; border:1px solid #fde68a; border-radius:var(--radius-sm); padding:18px; line-height:1.75; }
.pitfalls-card h3 { margin-bottom:12px; color:#92400e; }
.tips-card { background:var(--card); border:1px solid var(--border); border-radius:var(--radius-sm); padding:18px; line-height:1.75; }
.tips-card h3 { margin-bottom:14px; color:var(--primary); }
.tips-card ul { padding-left:20px; }
.tips-card li { margin-bottom:8px; }
.tips-note { margin-top:14px; padding:10px; background:var(--bg); border-radius:6px; font-size:.8rem; color:var(--text-muted); }

/* 考情资讯 */
.examinfo-card { background:var(--card); border:1px solid var(--border); border-radius:var(--radius-sm); padding:18px; }
.examinfo-card h3 { margin-bottom:16px; font-size:1.05rem; }
.info-row { display:flex; padding:10px 0; border-bottom:1px solid var(--border); gap:12px; }
.info-row:last-of-type { border-bottom:none; }
.info-label { flex:0 0 80px; font-weight:600; color:var(--text-muted); font-size:.84rem; }
.info-value { flex:1; font-size:.88rem; line-height:1.6; }
.info-note { margin-top:14px; padding:10px; background:var(--bg); border-radius:6px; font-size:.8rem; color:var(--text-muted); }
.info-section-title { margin:22px 0 12px; font-size:1rem; font-weight:700; color:var(--text); }
.passrate-table-wrap { overflow-x:auto; }
.passrate-table { width:100%; border-collapse:collapse; font-size:.86rem; }
.passrate-table th, .passrate-table td { padding:10px 12px; text-align:left; border:1px solid var(--border); }
.passrate-table th { background:var(--bg); font-weight:600; color:var(--text-muted); }
.passrate-table td { background:var(--card); }
.passrate-empty { padding:16px; background:var(--bg); border-radius:6px; font-size:.86rem; color:var(--text-muted); }

/* 每日闯关 */
.daily-card { text-align:center; padding:30px 20px; background:linear-gradient(135deg, var(--card) 0%, var(--bg) 100%); border:1px solid var(--border); border-radius:var(--radius-sm); }
.daily-card h3 { font-size:1.3rem; margin-bottom:10px; }
.daily-card p { color:var(--text-muted); font-size:.9rem; }

/* 首页学习档案入口 */
.profile-entry-card { display:flex; align-items:center; gap:14px; padding:16px 18px; background:var(--card); border:1px solid var(--border); border-radius:var(--radius-sm); cursor:pointer; transition:box-shadow .2s, transform .2s; }
.profile-entry-card:hover { box-shadow:0 4px 12px rgba(0,0,0,.08); transform:translateY(-1px); }
.pe-icon { font-size:1.6rem; }
.pe-info { flex:1; }
.pe-info strong { display:block; margin-bottom:4px; }
.pe-info p { font-size:.84rem; color:var(--text-muted); margin:0; }
.pe-arrow { color:var(--primary); font-weight:700; }

/* 学习档案页 */
.profile-page { max-width:760px; margin:0 auto; }
.profile-hero { text-align:center; margin-bottom:22px; }
.profile-hero h2 { font-size:1.5rem; margin-bottom:6px; }
.profile-hero p { color:var(--text-muted); font-size:.84rem; }
.profile-stats { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-bottom:22px; }
.profile-stat { text-align:center; padding:16px; background:var(--card); border:1px solid var(--border); border-radius:var(--radius-sm); }
.ps-num { font-size:1.6rem; font-weight:800; color:var(--primary); }
.ps-label { font-size:.78rem; color:var(--text-muted); margin-top:4px; }
.profile-badges, .profile-daily, .profile-cats { margin-bottom:22px; }
.profile-badges h3, .profile-daily h3, .profile-cats h3 { font-size:1.05rem; margin-bottom:12px; }
.badge-list { display:flex; flex-wrap:wrap; gap:8px; }
.badge-item { display:inline-block; padding:6px 12px; background:linear-gradient(135deg, #fbbf24, #f59e0b); color:#fff; border-radius:20px; font-size:.78rem; font-weight:600; }
.profile-cat-row { display:flex; align-items:center; gap:12px; padding:10px 0; border-bottom:1px solid var(--border); }
.pc-name { flex:0 0 120px; font-size:.86rem; }
.pc-bar { flex:1; height:8px; background:var(--border); border-radius:4px; overflow:hidden; }
.pc-fill { height:100%; background:var(--primary); border-radius:4px; }
.pc-pct { flex:0 0 60px; text-align:right; font-size:.8rem; color:var(--text-muted); }

@media (max-width: 640px) {
  .profile-stats { grid-template-columns:repeat(2,1fr); }
  .info-row { flex-direction:column; gap:4px; }
  .info-label { flex:none; }
  .book-card { flex-direction:column; }
  .pc-name { flex:0 0 90px; }
}

/* ════════════ 移动端适配（主站） ════════════ */
@media (max-width: 768px) {
  /* 容器收敛 */
  .section { padding: var(--space-xl) var(--space); }
  .detail-content { padding: 0 var(--space) var(--space-2xl); }
  .hero { padding: var(--space-2xl) var(--space); }
  .hero-inner { flex-direction: column; }
  .hero-visual { display: none; }                 /* 装饰插画手机端隐藏，省空间 */
  .hero-btns { flex-wrap: wrap; }
  .hero-btns a { flex: 1 1 auto; justify-content: center; }
  .hero-stats { flex-wrap: wrap; gap: var(--space); }

  /* 头部导航：logo+搜索一行，导航链接独立横滑行 */
  .topbar { height: auto; }
  .topbar-inner { flex-wrap: wrap; height: auto; padding: 8px var(--space); gap: 8px; }
  .logo { flex: 0 0 auto; }
  .nav-search { order: 2; flex: 1 1 auto; }
  .nav-search input { width: 100%; }
  .nav-search input:focus { width: 100%; }
  .nav-links { order: 3; flex: 1 1 100%; overflow-x: auto; gap: 2px; -webkit-overflow-scrolling: touch; padding-bottom: 2px; }
  .nav-links a { padding: 7px 12px; font-size: .82rem; white-space: nowrap; }

  /* 类目/视频网格双列密度，防窄屏溢出 */
  .features-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--space-sm); }
  .video-card h4 { font-size: .9rem; }

  /* 详情 tab 紧凑（本身已可横滑） */
  .detail-tabs { padding: 0 var(--space) var(--space-sm); gap: 6px; }
  .detail-tab { padding: 8px 14px; font-size: .82rem; }

  /* 练习选项触屏化 */
  .quiz-option { padding: 16px 16px; }
  .quiz-option span { font-size: 1rem; line-height: 1.55; }
  .quiz-question { font-size: 1.05rem; }
  .quiz-actions { flex-wrap: wrap; }
  .btn-prev, .btn-next { flex: 1 1 auto; min-height: 44px; }
  .btn-submit { min-height: 44px; }

  /* 视频弹窗自适应 */
  .video-player-box { width: 96%; }
  .video-player-box iframe { width: 100%; border: 0; }
  .video-player-close { font-size: 1.4rem; }

  .answer-card { flex-wrap: wrap; }
}

@media (max-width: 480px) {
  .quiz-actions { flex-direction: column; }
  .btn-submit, .btn-prev, .btn-next { width: 100%; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .features-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
  .hero h1 { font-size: 1.5rem; }
}

/* ======== 留言墙（右侧面板） ======== */
.msg-wall {
  position: fixed; top: 0; right: 0; width: 340px; height: 100vh; z-index: 9000;
  background: var(--card, #fff); color: var(--text, #222);
  box-shadow: -8px 0 30px rgba(0,0,0,.14);
  transform: translateX(100%); transition: transform .25s ease;
  display: flex; flex-direction: column; border-left: 1px solid var(--border, #eee);
}
.msg-wall.open { transform: translateX(0); }
.mw-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; font-weight: 700; font-size: 16px; border-bottom: 1px solid var(--border, #eee);
}
.mw-close { background: none; border: none; font-size: 18px; cursor: pointer; color: #999; line-height: 1; }
.mw-sub { padding: 6px 16px 10px; font-size: 12px; color: #999; }
.mw-list { flex: 1; overflow-y: auto; padding: 6px 16px 12px; }
.mw-item { padding: 10px 0; border-bottom: 1px solid var(--border, #f0f0f0); }
.mw-meta { display: flex; justify-content: space-between; font-size: 12px; color: #999; margin-bottom: 3px; }
.mw-meta b { color: var(--text, #333); }
.mw-body { font-size: 14px; line-height: 1.55; word-break: break-word; }
.mw-empty, .mw-loading { color: #aaa; font-size: 13px; text-align: center; padding: 22px 0; }
.mw-form { border-top: 1px solid var(--border, #eee); padding: 12px 16px; display: flex; flex-direction: column; gap: 8px; }
.mw-name, .mw-text {
  padding: 8px 10px; border: 1px solid var(--border, #ddd); border-radius: 8px;
  font-size: 13px; font-family: inherit; background: var(--bg, #fff); color: var(--text, #222);
}
.mw-text { min-height: 62px; resize: vertical; }
.mw-send { background: #6366f1; color: #fff; border: none; border-radius: 8px; padding: 9px; font-size: 14px; cursor: pointer; }
.mw-send:hover { background: #4f46e5; }
.mw-msg { font-size: 12px; min-height: 14px; }
.mw-msg.ok { color: #16a34a; } .mw-msg.err { color: #dc2626; } .mw-msg.info { color: #888; }
.mw-note { font-size: 11px; color: #999; line-height: 1.4; }
.mw-toggle {
  position: fixed; right: 18px; bottom: 18px; z-index: 9000;
  background: #6366f1; color: #fff; border: none; border-radius: 24px;
  padding: 11px 18px; font-size: 14px; cursor: pointer;
  box-shadow: 0 6px 20px rgba(99,102,241,.4);
}
.mw-toggle.hidden { display: none; }
.key-esc { margin: 6px 0 0; font-size: 13px; }
.key-esc a { color: #6366f1; text-decoration: none; }
.key-esc a:hover { text-decoration: underline; }
@media (max-width: 560px) {
  .msg-wall { width: 100%; }
}


/* ===== 答题即时反馈（2026-08-07 修复）===== */
.ans-feedback{margin:10px 0 8px;padding:9px 12px;border-radius:8px;font-weight:600;font-size:.85rem}
.ans-feedback.ok{background:rgba(16,185,129,.12);color:#059669;border:1px solid rgba(16,185,129,.35)}
.ans-feedback.no{background:rgba(239,68,68,.10);color:#dc2626;border:1px solid rgba(239,68,68,.32)}
[data-theme="dark"] .ans-feedback.ok{background:rgba(16,185,129,.16);color:#34d399;border-color:rgba(16,185,129,.4)}
[data-theme="dark"] .ans-feedback.no{background:rgba(239,68,68,.16);color:#f87171;border-color:rgba(239,68,68,.4)}