```css
/* ============================================
   奇优影院 - 完整样式表
   风格：现代深色影院风 + 渐变光效
   ============================================ */

/* ---------- CSS 变量与主题 ---------- */
:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #eef2f7;
  --bg-card: #ffffff;
  --bg-footer: #1e293b;
  --bg-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-heading: #0f172a;
  --text-footer: #cbd5e1;
  --text-footer-head: #ffffff;
  --text-link: #0b4f8a;
  --text-link-hover: #e94560;
  --border-light: #e2e8f0;
  --brand-color: #e94560;
  --brand-dark: #c81e45;
  --brand-glow: rgba(233, 69, 96, 0.35);
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-bg: rgba(255, 255, 255, 0.85);
  --nav-blur: blur(20px) saturate(180%);
  --input-bg: #ffffff;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.65);
  --hero-text: #f1f5f9;
  --hero-text-secondary: #cbd5e1;
  --stat-num: #ffffff;
  --stat-label: #94a3b8;
  --card-hover-transform: translateY(-6px);
  --gradient-text: linear-gradient(120deg, #f59e0b, #ef4444);
}

[data-theme="dark"] {
  --bg-primary: #0b1121;
  --bg-secondary: #131c31;
  --bg-card: #1e293b;
  --bg-footer: #0f172a;
  --bg-hero: linear-gradient(135deg, #0b1121 0%, #1e1b4b 50%, #0f172a 100%);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-heading: #f8fafc;
  --text-footer: #94a3b8;
  --text-footer-head: #f1f5f9;
  --text-link: #7ab7ff;
  --text-link-hover: #ff7b9c;
  --border-light: #334155;
  --brand-color: #ff6b81;
  --brand-dark: #ff8da1;
  --brand-glow: rgba(255, 107, 129, 0.3);
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
  --nav-bg: rgba(15, 23, 42, 0.85);
  --input-bg: #0f172a;
  --glass-bg: rgba(30, 41, 59, 0.5);
  --glass-border: rgba(148, 163, 184, 0.2);
  --hero-text: #f1f5f9;
  --hero-text-secondary: #cbd5e1;
  --stat-num: #ffffff;
  --stat-label: #94a3b8;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--brand-color) var(--bg-secondary);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: var(--transition);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::-webkit-scrollbar {
  width: 10px;
}

body::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

body::-webkit-scrollbar-thumb {
  background: var(--brand-color);
  border-radius: 8px;
  border: 2px solid var(--bg-secondary);
}

img,
svg {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
}

a:hover {
  color: var(--text-link-hover);
}

a:focus-visible {
  outline: 3px solid var(--brand-color);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ---------- 导航栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

.logo a {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--text-heading);
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform 0.3s ease;
  display: inline-block;
}

.logo a:hover {
  transform: scale(1.03);
  color: var(--text-heading);
}

.logo span {
  background: none;
  -webkit-text-fill-color: var(--brand-color);
  color: var(--brand-color);
}

.nav-menu {
  display: flex;
  gap: 32px;
  align-items: center;
  list-style: none;
}

.nav-menu a {
  font-weight: 500;
  color: var(--text-primary);
  padding: 8px 4px;
  position: relative;
  background: none;
  -webkit-text-fill-color: currentColor;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-color), var(--brand-dark));
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-menu a:hover {
  color: var(--brand-dark);
  -webkit-text-fill-color: currentColor;
}

.nav-menu a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--input-bg);
  border: 1.5px solid var(--border-light);
  border-radius: 50px;
  padding: 4px 6px 4px 16px;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.search-box:focus-within {
  border-color: var(--brand-color);
  box-shadow: 0 0 0 3px var(--brand-glow);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  outline: none;
  padding: 6px 10px;
  width: 160px;
  font-size: 0.95rem;
  transition: width 0.3s ease;
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.search-box input:focus {
  width: 200px;
}

.search-btn {
  background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
  border: none;
  color: white;
  padding: 8px 18px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  box-shadow: 0 4px 15px var(--brand-glow);
}

.search-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--brand-glow);
}

.theme-toggle {
  background: var(--bg-card);
  border: 1.5px solid var(--border-light);
  border-radius: 50px;
  padding: 8px 16px;
  cursor: pointer;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-toggle:hover {
  border-color: var(--brand-color);
  transform: scale(1.05);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.hamburger:hover {
  background: var(--bg-secondary);
}

.hamburger span {
  width: 26px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 3px;
  transition: var(--transition);
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  background: var(--bg-card);
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  box-shadow: var(--shadow-md);
  backdrop-filter: var(--nav-blur);
}

.mobile-menu.show {
  display: block;
  animation: slideDown 0.35s ease;
}

.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-weight: 500;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 1.05rem;
  transition: var(--transition);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu a:hover {
  color: var(--brand-color);
  padding-left: 8px;
}

/* ---------- Hero 首屏 ---------- */
.hero {
  position: relative;
  padding: 80px 0 100px;
  background: var(--bg-hero);
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--brand-glow), transparent 60%);
  z-index: -1;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.15), transparent 70%);
  z-index: -1;
  animation: float 12s ease-in-out infinite reverse;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  flex-wrap: wrap;
}

.hero-text {
  flex: 1 1 450px;
  color: var(--hero-text);
}

.hero-badge {
  background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
  color: white;
  padding: 8px 20px;
  border-radius: 50px;
  display: inline-block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 24px;
  box-shadow: 0 4px 20px var(--brand-glow);
  animation: pulse-glow 3s ease-in-out infinite;
}

.hero-text h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--hero-text);
  letter-spacing: -1px;
}

.hero-text h1 span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  font-size: 0.8em;
  margin-top: 8px;
}

.hero-text p {
  font-size: 1.2rem;
  color: var(--hero-text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
  max-width: 600px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.stat-item {
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -24px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
}

.stat-item .num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--stat-num);
  line-height: 1.2;
  display: block;
  font-variant-numeric: tabular-nums;
}

.stat-item .label {
  color: var(--stat-label);
  font-size: 0.95rem;
}

.hero-poster {
  flex: 1 1 300px;
  max-width: 320px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  text-align: center;
  transform: perspective(1000px) rotateY(-5deg);
  transition: var(--transition);
  animation: float-card 6s ease-in-out infinite;
}

.hero-poster:hover {
  transform: perspective(1000px) rotateY(0deg) translateY(-8px);
}

.hero-poster svg {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* ---------- 通用区块 ---------- */
section {
  padding: 20px 0;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-heading);
  margin: 60px 0 36px;
  position: relative;
  padding-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-color), var(--brand-dark));
  border-radius: 4px;
  transition: width 0.4s ease;
}

.section-title:hover::after {
  width: 120px;
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-bottom: 20px;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-color), var(--brand-dark));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: var(--card-hover-transform);
  box-shadow: var(--shadow-md);
  border-color: var(--brand-color);
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  color: var(--text-heading);
  font-size: 1.45rem;
  margin-bottom: 16px;
  font-weight: 700;
}

.card h4 {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 12px;
  font-weight: 500;
}

.card p {
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.card .link {
  color: var(--brand-color);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}

.card .link:hover {
  gap: 8px;
  color: var(--brand-dark);
}

/* ---------- 文章列表 ---------- */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.article-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 32px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.article-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--brand-color), var(--brand-dark));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s ease;
}

.article-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--brand-color);
}

.article-item:hover::before {
  transform: scaleY(1);
}

.article-item h3 {
  font-size: 1.35rem;
  color: var(--text-heading);
  margin-bottom: 8px;
  font-weight: 700;
  line-height: 1.4;
}

.article-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 12px 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-meta::before {
  content: '📅';
  font-size: 1rem;
}

.article-summary {
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.article-item .link {
  color: var(--brand-color);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}

.article-item .link:hover {
  gap: 8px;
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--brand-color);
  box-shadow: var(--shadow-md);
}

.faq-item.active {
  border-color: var(--brand-color);
  box-shadow: 0 4px 20px var(--brand-glow);
}

.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  user-select: none;
  gap: 16px;
}

.faq-question:hover {
  color: var(--brand-color);
}

.faq-question span {
  font-size: 1.4rem;
  font-weight: 400;
  transition: transform 0.3s ease;
  color: var(--brand-color);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-secondary);
}

.faq-item.active .faq-question span {
  transform: rotate(45deg);
  background: var(--brand-color);
  color: white;
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-primary);
  display: none;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  margin-top: 0;
  line-height: 1.8;
  animation: fadeIn 0.3s ease;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ---------- HowTo ---------- */
.howto-steps {
  background: var(--bg-card);
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.howto-steps::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-color), var(--brand-dark), var(--brand-color));
  background-size: 200% 100%;
  animation: gradient-slide 3s linear infinite;
}

.step {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  padding: 12px;
  border-radius: 12px;
  transition: var(--transition);
}

.step:hover {
  background: var(--bg-secondary);
}

.step:last-child {
  margin-bottom: 0;
}

.step-num {
  background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
  font-size: 1.1rem;
  box-shadow: 0 4px 15px var(--brand-glow);
}

.step strong {
  color: var(--text-heading);
  display: block;
  margin-bottom: 4px;
}

.step div {
  color: var(--text-primary);
  line-height: 1.7;
}

/* ---------- 表格 ---------- */
.info-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.info-table th,
.info-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
}

.info-table th {
  background: var(--bg-secondary);
  color: var(--text-heading);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-table tr:last-child td {
  border-bottom: none;
}

.info-table tr {
  transition: var(--transition);
}

.info-table tbody tr:hover {
  background: var(--bg-secondary);
}

.info-table td:first-child {
  font-weight: 600;
  color: var(--text-heading);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--bg-footer);
  color: var(--text-footer);
  padding: 60px 0 24px;
  margin-top: 80px;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--brand-color), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 48px;
  margin-bottom: 40px;
}

.footer-grid h4 {
  color: var(--text-footer-head);
  font-size: 1.2rem;
  margin-bottom: 20px;
  font-weight: 700;
  position: relative;
  padding-bottom: 12px;
}

.footer-grid h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--brand-color);
  border-radius: 2px;
}

.footer-grid a {
  color: var(--text-footer);
  display: block;
  margin-bottom: 12px;
  transition: var(--transition);
  font-size: 0.95rem;
}

.footer-grid a:hover {
  color: var(--brand-color);
  transform: translateX(6px);
}

.copyright {
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  margin-top: 40px;
  padding-top: 24px;
  text-align: center;
  color: var(--text-footer);
  font-size: 0.9rem;
  line-height: 2;
}

.copyright p:last-child {
  opacity: 0.7;
  font-size: 0.85rem;
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
  color: white;
  border: none;
  border-radius: 50px;
  padding: 12px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  display: none;
  z-index: 999;
  box-shadow: 0 8px 25px var(--brand-glow);
  transition: var(--transition);
  align-items: center;
  gap: 8px;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 35px var(--brand-glow);
}

.back-to-top.show {
  display: flex;
}

/* ---------- 动画 ---------- */
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes float-card {
  0%, 100% { transform: perspective(1000px) rotateY(-5deg) translateY(0); }
  50% { transform: perspective(1000px) rotateY(-3deg) translateY(-12px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 4px 20px var(--brand-glow); }
  50% { box-shadow: 0 4px 40px var(--brand-glow), 0 0 60px var(--brand-glow); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes gradient-slide {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-content {
    gap: 40px;
  }

  .hero-poster {
    max-width: 280px;
  }

  .card-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .nav-menu,
  .nav-actions .search-box,
  .theme-toggle {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu.show {
    display: block;
  }

  .hero {
    padding: 60px 0 80px;
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-text p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-stats {
    justify-content: center;
    gap: 32px;
  }

  .stat-item:not(:last-child)::after {
    right: -16px;
  }

  .hero-poster {
    max-width: 260px;
    margin: 0 auto;
    transform: none;
  }

  .hero-poster:hover {
    transform: translateY(-8px);
  }

  .section-title {
    margin: 40px 0 28px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .article-item {
    padding: 24px;
  }

  .howto-steps {
    padding: 24px;
  }

  .info-table {
    font-size: 0.9rem;
  }

  .info-table th,
  .info-table td {
    padding: 14px 16px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    padding: 10px 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .stat-item:not(:last-child)::after {
    display: none;
  }

  .stat-item .num {
    font-size: 2rem;
  }

  .card {
    padding: 24px 20px;
  }

  .article-item {
    padding: 20px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 1rem;
  }

  .faq-answer {
    padding: 0 18px 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* ---------- 无障碍与打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .site-header,
  .hero,
  .back-to-top,
  .mobile-menu {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card,
  .article-item,
  .faq-item,
  .howto-steps {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* ---------- 选择文本样式 ---------- */
::selection {
  background: var(--brand-color);
  color: white;
}

/* ---------- 链接下划线动画 ---------- */
.nav-menu a,
.footer-grid a,
.article-item .link,
.card .link {
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0% 100%;
  background-repeat: no-repeat;
  background-size: 0% 2px;
  transition: background-size 0.3s ease, color 0.3s ease;
}

.nav-menu a:hover,
.footer-grid a:hover,
.article-item .link:hover,
.card .link:hover {
  background-size: 100% 2px;
  text-decoration: none;
}
```