```css

/* ===== 汤姆影院 · 全局设计令牌 ===== */
:root {
  /* 主色板 — 猫眼探险 · 活力片库 */
  --brand-primary: #1e3a8a;
  --brand-accent: #2563eb;
  --brand-gradient: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #2563eb 100%);
  --brand-gradient-soft: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  
  /* 功能色 */
  --gold-accent: #f59e0b;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* 亮色主题 */
  --bg-light: #f8fafc;
  --bg-light-alt: #eef2f7;
  --card-light: #ffffff;
  --card-light-hover: #f1f5f9;
  --border-light: #cbd5e1;
  --border-light-strong: #94a3b8;
  --text-light: #1e293b;
  --text-light-secondary: #475569;
  --text-light-muted: #64748b;
  --heading-light: #0f172a;
  --nav-bg-light: rgba(255, 255, 255, 0.82);
  --footer-bg-light: #e2e8f0;
  --shadow-light: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-light-hover: 0 12px 32px rgba(15, 23, 42, 0.12);

  /* 暗色主题 */
  --bg-dark: #0b1525;
  --bg-dark-alt: #111f33;
  --card-dark: #16213a;
  --card-dark-hover: #1e2c47;
  --border-dark: #2d3b52;
  --border-dark-strong: #3e5068;
  --text-dark: #e2e8f0;
  --text-dark-secondary: #94a3b8;
  --text-dark-muted: #7c8ba0;
  --heading-dark: #f8fafc;
  --nav-bg-dark: rgba(11, 21, 37, 0.85);
  --footer-bg-dark: #0a1220;
  --shadow-dark: 0 4px 28px rgba(0, 0, 0, 0.45);
  --shadow-dark-hover: 0 12px 40px rgba(0, 0, 0, 0.6);
  
  /* 圆角 */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 999px;

  /* 字体 */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-display: 'Sora', 'Inter', system-ui, sans-serif;

  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;

  /* 过渡 */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg-light);
  color: var(--text-light);
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark {
  background: var(--bg-dark);
  color: var(--text-dark);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--heading-light);
  transition: color 0.3s ease;
}

body.dark h1,
body.dark h2,
body.dark h3,
body.dark h4,
body.dark h5,
body.dark h6 {
  color: var(--heading-dark);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-top: var(--space-xl); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 0.75rem;
  color: inherit;
}

a {
  color: var(--brand-accent);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
  position: relative;
}

a:hover {
  color: var(--brand-primary);
  text-decoration: none;
}

body.dark a {
  color: #93c5fd;
}

body.dark a:hover {
  color: #bfdbfe;
}

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

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.35rem;
}

::selection {
  background: var(--brand-primary);
  color: #ffffff;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-light-strong);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brand-accent);
}

body.dark ::-webkit-scrollbar-thumb {
  background: var(--border-dark-strong);
}

/* ===== 通用容器 ===== */
.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
}

.section {
  padding: var(--space-2xl) 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-xl);
}

.section-header h2 {
  margin-top: 0;
  border-left: none;
  padding-left: 0;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--brand-gradient);
}

.section-header p {
  color: var(--text-light-secondary);
  font-size: 1.05rem;
  margin-top: 1rem;
}

body.dark .section-header p {
  color: var(--text-dark-secondary);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--brand-gradient);
  color: #ffffff;
  padding: 0.7rem 1.8rem;
  border: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-smooth);
  box-shadow: 0 4px 16px rgba(30, 58, 138, 0.25);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 58, 138, 0.35);
  color: #ffffff;
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(30, 58, 138, 0.2);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--brand-accent);
  color: var(--brand-accent);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--brand-accent);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-gold {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

.btn-gold:hover {
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
}

body.dark .btn-outline {
  border-color: #60a5fa;
  color: #60a5fa;
}

body.dark .btn-outline:hover {
  background: #60a5fa;
  color: var(--bg-dark);
}

/* ===== 输入框 ===== */
.input-field {
  width: 100%;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--card-light);
  color: var(--text-light);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: all var(--transition-fast);
  outline: none;
}

.input-field:focus {
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

body.dark .input-field {
  background: var(--card-dark);
  border-color: var(--border-dark);
  color: var(--text-dark);
}

body.dark .input-field:focus {
  border-color: #60a5fa;
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15);
}

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg-light);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
  transition: all 0.3s ease;
}

body.dark .navbar {
  background: var(--nav-bg-dark);
  border-bottom-color: rgba(51, 65, 85, 0.3);
}

.navbar.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
  gap: 1rem;
  min-height: 70px;
}

.brand a {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand a:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

.brand .brand-icon {
  display: inline-block;
  margin-right: 4px;
  -webkit-text-fill-color: initial;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-light-secondary);
  position: relative;
  padding: 0.3rem 0;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-accent);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--brand-primary);
}

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

body.dark .nav-links a {
  color: var(--text-dark-secondary);
}

body.dark .nav-links a:hover {
  color: #93c5fd;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--card-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 0.2rem 0.2rem 0.2rem 1rem;
  transition: all var(--transition-fast);
  flex-shrink: 1;
  max-width: 280px;
  width: 100%;
}

.search-box:focus-within {
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

body.dark .search-box {
  background: var(--card-dark);
  border-color: var(--border-dark);
}

.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.5rem 0.5rem;
  color: inherit;
  outline: none;
  font-size: 0.9rem;
  min-width: 0;
}

.search-box button {
  background: var(--brand-gradient);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-full);
  padding: 0.5rem 1.2rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.search-box button:hover {
  opacity: 0.9;
  transform: scale(1.03);
}

/* 暗色切换按钮 */
.dark-toggle {
  background: var(--card-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 0.45rem 1rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
  color: var(--text-light);
}

.dark-toggle:hover {
  border-color: var(--brand-accent);
  background: var(--bg-light-alt);
}

body.dark .dark-toggle {
  background: var(--card-dark);
  border-color: var(--border-dark);
  color: var(--text-dark);
}

body.dark .dark-toggle:hover {
  background: var(--card-dark-hover);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.8rem;
  color: var(--text-light);
  cursor: pointer;
  padding: 0.2rem;
  line-height: 1;
  transition: color 0.2s ease;
}

body.dark .mobile-menu-btn {
  color: var(--text-dark);
}

/* ===== Banner轮播 ===== */
.banner-section {
  margin: var(--space-lg) 0;
  position: relative;
}

.banner-slider {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  min-height: 420px;
  background: var(--brand-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.2);
}

.banner-slider::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.slide {
  padding: clamp(2rem, 5vw, 4rem);
  display: none;
  width: 100%;
  position: relative;
  z-index: 1;
  animation: slideFadeIn 0.6s ease forwards;
}

.slide.active {
  display: block;
}

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

.slide h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: #ffffff;
  border: none;
  margin-top: 0;
  margin-bottom: 1rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.slide p {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: rgba(255, 255, 255, 0.9);
  max-width: 650px;
  margin-bottom: 1.5rem;
}

.slide .btn {
  background: #ffffff;
  color: var(--brand-primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.slide .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.slider-dots {
  position: absolute;
  bottom: 24px;
  right: 30px;
  display: flex;
  gap: 8px;
  z-index: 10;
}

.dot {
  width: 10px;
  height: 10px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.3s ease;
}

.dot.active {
  background: #ffffff;
  width: 32px;
}

.dot:hover {
  background: rgba(255, 255, 255, 0.7);
}

/* ===== 卡片通用 ===== */
.card {
  background: var(--card-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-light);
  padding: var(--space-lg);
  border: 1px solid rgba(203, 213, 225, 0.4);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-light-hover);
  border-color: transparent;
}

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

body.dark .card {
  background: var(--card-dark);
  border-color: rgba(51, 65, 85, 0.4);
  box-shadow: var(--shadow-dark);
}

body.dark .card:hover {
  background: var(--card-dark-hover);
  box-shadow: var(--shadow-dark-hover);
}

.card h3 {
  margin-top: 0;
  font-size: 1.25rem;
}

.card p {
  color: var(--text-light-secondary);
  font-size: 0.95rem;
}

body.dark .card p {
  color: var(--text-dark-secondary);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: inline-block;
  line-height: 1;
}

/* ===== 网格布局 ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
}

/* ===== 品牌故事块 ===== */
.brand-block {
  background: var(--card-light);
  padding: clamp(1.5rem, 4vw, 3rem);
  border-radius: var(--radius-xl);
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow-light);
  border: 1px solid rgba(203, 213, 225, 0.3);
  position: relative;
  overflow: hidden;
}

.brand-block::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

body.dark .brand-block {
  background: var(--card-dark);
  border-color: rgba(51, 65, 85, 0.3);
  box-shadow: var(--shadow-dark);
}

.brand-block h2 {
  margin-top: 0;
  border-left: 4px solid var(--brand-accent);
  padding-left: 1rem;
}

.brand-block p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-light-secondary);
  position: relative;
  z-index: 1;
}

body.dark .brand-block p {
  color: var(--text-dark-secondary);
}

/* ===== 文章列表 ===== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.article-item {
  border-bottom: 1px solid var(--border-light);
  padding: 1.2rem 0.5rem;
  transition: all var(--transition-smooth);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.article-item:last-child {
  border-bottom: none;
}

.article-item:hover {
  background: var(--bg-light-alt);
  padding-left: 1.2rem;
  padding-right: 1.2rem;
}

body.dark .article-item {
  border-color: var(--border-dark);
}

body.dark .article-item:hover {
  background: var(--card-dark-hover);
}

.article-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  transition: color 0.2s ease;
}

.article-item:hover h3 {
  color: var(--brand-accent);
}

body.dark .article-item:hover h3 {
  color: #93c5fd;
}

.article-item .meta {
  font-size: 0.85rem;
  color: var(--text-light-muted);
  margin-bottom: 0.6rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

body.dark .article-item .meta {
  color: var(--text-dark-muted);
}

.article-item p {
  color: var(--text-light-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

body.dark .article-item p {
  color: var(--text-dark-secondary);
}

.article-item .read-more {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--brand-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-item .read-more:hover {
  text-decoration: underline;
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--card-light);
  padding: 0.2rem 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-light);
  border: 1px solid rgba(203, 213, 225, 0.3);
  transition: all var(--transition-smooth);
}

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

body.dark .faq-item {
  background: var(--card-dark);
  border-color: rgba(51, 65, 85, 0.3);
  box-shadow: var(--shadow-dark);
}

.faq-item details {
  padding: 1rem 0;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--heading-light);
  padding: 0.5rem 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--brand-accent);
  transition: transform 0.3s ease;
  margin-left: 1rem;
}

.faq-item details[open] summary {
  color: var(--brand-accent);
}

.faq-item details[open] summary::after {
  transform: rotate(45deg);
}

body.dark .faq-item summary {
  color: var(--heading-dark);
}

.faq-item details p {
  margin-top: 0.8rem;
  color: var(--text-light-secondary);
  padding-left: 0.5rem;
  border-left: 3px solid var(--brand-accent);
  padding-left: 1rem;
  animation: fadeIn 0.3s ease;
}

body.dark .faq-item details p {
  color: var(--text-dark-secondary);
}

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

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

body.dark .info-table {
  background: var(--card-dark);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-dark);
}

.info-table th,
.info-table td {
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border-light);
  text-align: left;
}

.info-table th {
  background: var(--bg-light-alt);
  color: var(--heading-light);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

body.dark .info-table th {
  background: var(--card-dark-hover);
  color: var(--heading-dark);
}

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

.info-table tbody tr {
  transition: background 0.2s ease;
}

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

body.dark .info-table tbody tr:hover {
  background: var(--card-dark-hover);
}

/* ===== 统计数字 ===== */
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-family: var(--font-display);
  line-height: 1.2;
}

body.dark .stat-number {
  background: linear-gradient(135deg, #60a5fa, #93c5fd);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== 页脚 ===== */
footer {
  background: var(--footer-bg-light);
  margin-top: var(--space-2xl);
  padding: var(--space-xl) 0 var(--space-lg);
  border-top: 1px solid var(--border-light);
  position: relative;
}

body.dark footer {
  background: var(--footer-bg-dark);
  border-top-color: var(--border-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-grid h4 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

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

.footer-grid p {
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.footer-grid a {
  color: var(--text-light-secondary);
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.footer-grid a:hover {
  color: var(--brand-accent);
  padding-left: 4px;
}

body.dark .footer-grid a {
  color: var(--text-dark-secondary);
}

body.dark .footer-grid a:hover {
  color: #93c5fd;
}

.footer-brand {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.copyright {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  color: var(--text-light-muted);
}

body.dark .copyright {
  border-top-color: var(--border-dark);
  color: var(--text-dark-muted);
}

/* ===== 返回顶部 ===== */
#backTop {
  background: var(--brand-gradient);
  color: #ffffff;
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  font-size: 1.4rem;
  position: fixed;
  bottom: 30px;
  right: 30px;
  cursor: pointer;
  display: none;
  z-index: 999;
  box-shadow: 0 8px 24px rgba(30, 58, 138, 0.3);
  transition: all var(--transition-smooth);
  line-height: 1;
}

#backTop:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 32px rgba(30, 58, 138, 0.4);
}

#backTop.show {
  display: block;
  animation: fadeInUp 0.3s ease;
}

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

/* ===== 滚动动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-muted { color: var(--text-light-muted); }
body.dark .text-muted { color: var(--text-dark-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: 0.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-2 { margin-bottom: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .nav-links {
    gap: 1.2rem;
  }
  
  .search-box {
    max-width: 200px;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    padding: 1rem 0;
    background: var(--nav-bg-light);
    backdrop-filter: blur(16px);
    border-radius: var(--radius-md);
    margin-top: 0.5rem;
    animation: slideDown 0.3s ease;
  }
  
  body.dark .nav-links {
    background: var(--nav-bg-dark);
  }
  
  .nav-links.open {
    display: flex;
  }
  
  .nav-links a {
    padding: 0.7rem 1rem;
    border-radius: var(--radius-sm);
  }
  
  .nav-links a:hover {
    background: var(--bg-light-alt);
  }
  
  body.dark .nav-links a:hover {
    background: var(--card-dark-hover);
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .search-box {
    order: 3;
    max-width: none;
    width: 100%;
    margin-top: 0.5rem;
  }
  
  .nav-inner {
    flex-wrap: wrap;
  }
  
  .brand {
    order: 1;
  }
  
  .dark-toggle {
    order: 2;
    margin-left: auto;
  }
  
  .mobile-menu-btn {
    order: 2;
  }
  
  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  
  .banner-slider {
    min-height: 320px;
  }
  
  .slide {
    padding: 1.5rem;
  }
  
  .slide h2 {
    font-size: 1.6rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .card {
    padding: 1.25rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  
  #backTop {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    bottom: 20px;
    right: 20px;
  }
  
  .slider-dots {
    bottom: 16px;
    right: 20px;
  }
  
  .stat-number {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .brand a {
    font-size: 1.4rem;
  }
  
  .banner-slider {
    min-height: 280px;
    border-radius: var(--radius-lg);
  }
  
  .slide h2 {
    font-size: 1.4rem;
  }
  
  .slide p {
    font-size: 0.95rem;
  }
  
  .faq-item {
    padding: 0.2rem 1rem;
  }
  
  .search-box button {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .navbar,
  .banner-section,
  #backTop,
  .mobile-menu-btn,
  .dark-toggle {
    display: none !important;
  }
  
  body {
    background: #ffffff;
    color: #000000;
  }
  
  .card,
  .brand-block,
  .faq-item {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ===== 无障碍与高对比度 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 自定义焦点样式 ===== */
:focus-visible {
  outline: 3px solid var(--brand-accent);
  outline-offset: 2px;
}

body.dark :focus-visible {
  outline-color: #60a5fa;
}

/* ===== 卡片网格增强 ===== */
.card-highlight {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  color: #ffffff;
  border: none;
}

.card-highlight h3,
.card-highlight p {
  color: #ffffff;
}

.card-highlight .btn {
  background: #ffffff;
  color: var(--brand-primary);
}

.card-highlight::before {
  background: #ffffff;
}

/* ===== 数字动画 ===== */
.stat-number {
  display: inline-block;
  min-width: 80px;
}

/* ===== 深色模式额外微调 ===== */
body.dark .brand-block h2 {
  border-left-color: #60a5fa;
}

body.dark .section-header h2::after {
  background: linear-gradient(135deg, #60a5fa, #93c5fd);
}

body.dark .article-item:hover {
  background: var(--card-dark-hover);
}

body.dark .faq-item summary::after {
  color: #60a5fa;
}

/* ===== 渐变边框卡片 ===== */
.gradient-border {
  border: 2px solid transparent;
  background: linear-gradient(var(--card-light), var(--card-light)) padding-box,
              var(--brand-gradient) border-box;
}

body.dark .gradient-border {
  background: linear-gradient(var(--card-dark), var(--card-dark)) padding-box,
              linear-gradient(135deg, #60a5fa, #93c5fd) border-box;
}

/* ===== 悬停微交互 ===== */
.hover-lift {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
}

body.dark .hover-lift:hover {
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

/* ===== 图标动画 ===== */
.icon-pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

/* ===== 分隔线 ===== */
.divider {
  width: 60px;
  height: 4px;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
  margin: var(--space-md) auto;
}

/* ===== 标签 ===== */
.tag {
  display: inline-block;
  padding: 0.2rem 0.8rem;
  background: var(--bg-light-alt);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-light-secondary);
  margin-right: 0.4rem;
  margin-bottom: 0.4rem;
  transition: all 0.2s ease;
}

.tag:hover {
  background: var(--brand-accent);
  color: #ffffff;
}

body.dark .tag {
  background: var(--card-dark-hover);
  color: var(--text-dark-secondary);
}

body.dark .tag:hover {
  background: #60a5fa;
  color: var(--bg-dark);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 0;
  font-size: 0.9rem;
}

.breadcrumb a {
  color: var(--text-light-muted);
}

.breadcrumb a:hover {
  color: var(--brand-accent);
}

.breadcrumb .separator {
  color: var(--text-light-muted);
}

body.dark .breadcrumb a,
body.dark .breadcrumb .separator {
  color: var(--text-dark-muted);
}

/* ===== 列表组 ===== */
.list-group {
  list-style: none;
  padding: 0;
}

.list-group li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.list-group li:last-child {
  border-bottom: none;
}

.list-group li::before {
  content: '▸';
  color: var(--brand-accent);
  font-size: 1.1rem;
}

body.dark .list-group li {
  border-bottom-color: var(--border-dark);
}

/* ===== 引用块 ===== */
blockquote {
  background: var(--bg-light-alt);
  border-left: 4px solid var(--brand-accent);
  padding: 1.2rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--text-light-secondary);
}

body.dark blockquote {
  background: var(--card-dark);
  color: var(--text-dark-secondary);
}

/* ===== 代码块 ===== */
code {
  background: var(--bg-light-alt);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: 'Fira Code', 'Consolas', monospace;
}

body.dark code {
  background: var(--card-dark-hover);
}

pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 1.2rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1.5rem 0;
}

pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* ===== 表单样式 ===== */
.form-group {
  margin-bottom: 1.2rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--card-light);
  color: var(--text-light);
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

body.dark .form-control {
  background: var(--card-dark);
  border-color: var(--border-dark);
  color: var(--text-dark);
}

/* ===== 按钮组 ===== */
.btn-group {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

/* ===== 徽章 ===== */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--brand-accent);
  color: #ffffff;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-gold {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.badge-green {
  background: var(--success);
}

.badge-outline {
  background: transparent;
  border: 1px solid var(--brand-accent);
  color: var(--brand-accent);
}

/* ===== 时间线 ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
  margin: 1.5rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
}

.timeline-item {
  position: relative;
  padding-bottom: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--brand-accent);
  border: 2px solid var(--card-light);
  box-shadow: 0 0 0 2px var(--brand-accent);
}

body.dark .timeline-item::before {
  border-color: var(--card-dark);
}

/* ===== 进度条 ===== */
.progress {
  height: 8px;
  background: var(--bg-light-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 0.5rem 0;
}

body.dark .progress {
  background: var(--card-dark-hover);
}

.progress-bar {
  height: 100%;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
  transition: width 0.6s ease;
}

/* ===== 工具提示 ===== */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltip-text {
  visibility: hidden;
  background: #1e293b;
  color: #ffffff;
  text-align: center;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* ===== 加载动画 ===== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-light);
  border-top-color: var(--brand-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 2rem auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

body.dark .loading-spinner {
  border-color: var(--border-dark);
  border-top-color: #60a5fa;
}

/* ===== 骨架屏 ===== */
.skeleton {
  background: linear-gradient(90deg, var(--bg-light-alt) 25%, var(--border-light) 50%, var(--bg-light-alt) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

body.dark .skeleton {
  background: linear-gradient(90deg, var(--card-dark) 25%, var(--border-dark) 50%, var(--card-dark) 75%);
  background-size: 200% 100%;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ===== 空状态 ===== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-light-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

body.dark .empty-state {
  color: var(--text-dark-muted);
}

/* ===== 通知提示 ===== */
.notice {
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-sm);
  margin: 1rem 0;
  font-size: 0.9rem;
  border-left: 4px solid;
}

.notice-info {
  background: rgba(37, 99, 235, 0.08);
  border-color: var(--brand-accent);
  color: var(--brand-accent);
}

.notice-success {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--success);
  color: var(--success);
}

.notice-warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: var(--warning);
  color: #b45309;
}

.notice-error {
  background: rgba(239, 68, 68, 0.08);
  border-color: var(--error);
  color: #b91c1c;
}

body.dark .notice-info {
  background: rgba(96, 165, 250, 0.1);
  color: #93c5fd;
}

body.dark .notice-warning {
  color: #fbbf24;
}

body.dark .notice-error {
  color: #f87171;
}

/* ===== 响应式字体 ===== */
@media (max-width: 480px) {
  .faq-item summary {
    font-size: 0.95rem;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .navbar, .footer, .banner-slider, .mobile-menu-btn, #backTop {
    display: none !important;
  }
}

/* ===== 最终优化 ===== */
* {
  -webkit-tap-highlight-color: transparent;
}

button {
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
}

::placeholder {
  color: var(--text-light-muted);
  opacity: 0.7;
}

body.dark ::placeholder {
  color: var(--text-dark-muted);
}

```