```css
/* ========== 茄子视频 全局样式 ========== */
/* 设计语言：现代影视社区风格，深色优雅 + 渐变点缀 */
/* 支持暗色模式、滚动动画、毛玻璃效果、响应式布局 */

:root {
  --bg-light: #F8FAFC;
  --bg-dark: #0B1120;
  --surface-light: #FFFFFF;
  --surface-dark: #1E293B;
  --text-primary-light: #1F2937;
  --text-secondary-light: #334155;
  --text-heading-light: #0F172A;
  --text-primary-dark: #E2E8F0;
  --text-secondary-dark: #CBD5E1;
  --text-heading-dark: #F8FAFC;
  --accent: #3B82F6;
  --accent-dark: #60A5FA;
  --border-light: #CBD5E1;
  --border-dark: #334155;
  --card-bg-light: #FFFFFF;
  --card-bg-dark: #1E293B;
  --footer-bg-light: #F1F5F9;
  --footer-bg-dark: #0F172A;
  --btn-bg-light: #1F2937;
  --btn-bg-dark: #E2E8F0;
  --btn-text-light: #FFFFFF;
  --btn-text-dark: #1F2937;
  --nav-bg-light: rgba(255,255,255,0.85);
  --nav-bg-dark: rgba(30,41,59,0.85);
  --faq-bg-light: #FFFFFF;
  --faq-bg-dark: #1E293B;
  --glass-bg-light: rgba(255,255,255,0.6);
  --glass-bg-dark: rgba(30,41,59,0.6);
  --glass-border-light: rgba(255,255,255,0.3);
  --glass-border-dark: rgba(255,255,255,0.1);
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --gradient-banner: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-hero: linear-gradient(145deg, #EFF6FF, #E2E8F0);
  --gradient-hero-dark: linear-gradient(145deg, #0F172A, #1E293B);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(255,255,255,0.5));
  --gradient-card-dark: linear-gradient(145deg, rgba(30,41,59,0.9), rgba(30,41,59,0.5));
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-primary-light);
  line-height: 1.7;
  transition: background-color 0.3s, color 0.3s;
  overflow-x: hidden;
}

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

/* 标题层级 */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading-light);
  font-weight: 700;
  line-height: 1.3;
  transition: color 0.3s;
}

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

h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 2.5rem 0 1.5rem;
  border-left: 6px solid var(--accent);
  padding-left: 1rem;
  background: linear-gradient(90deg, var(--accent), transparent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

body.dark-mode h2 {
  border-left-color: var(--accent-dark);
  background: linear-gradient(90deg, var(--accent-dark), transparent);
  -webkit-background-clip: text;
  background-clip: text;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  margin: 1.5rem 0 0.75rem;
  color: var(--text-primary-light);
}

body.dark-mode h3 {
  color: var(--text-primary-dark);
}

h4 {
  font-size: 1.15rem;
  margin: 1rem 0 0.5rem;
  color: var(--text-secondary-light);
}

body.dark-mode h4 {
  color: var(--text-secondary-dark);
}

p {
  margin-bottom: 1rem;
  color: var(--text-primary-light);
}

body.dark-mode p {
  color: var(--text-primary-dark);
}

a {
  color: #1D4ED8;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

body.dark-mode a {
  color: #93C5FD;
}

a:hover {
  text-decoration: underline;
  color: var(--accent);
}

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

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

li {
  margin-bottom: 0.5rem;
}

blockquote {
  border-left: 4px solid var(--accent);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: rgba(59, 130, 246, 0.08);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-secondary-light);
}

body.dark-mode blockquote {
  border-left-color: var(--accent-dark);
  background: rgba(96, 165, 250, 0.1);
  color: var(--text-secondary-dark);
}

/* 容器 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
}

/* ========== 导航栏 ========== */
.navbar {
  background-color: var(--nav-bg-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color 0.3s, box-shadow 0.3s;
  border-bottom: 1px solid rgba(203, 213, 225, 0.3);
}

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

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 0.8rem 24px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-heading-light);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.01em;
}

body.dark-mode .logo {
  color: var(--text-heading-dark);
}

.logo svg {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-primary-light);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  padding: 0.5rem 0;
  transition: color 0.2s;
}

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

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

.nav-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--surface-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-full);
  padding: 0.2rem 0.4rem 0.2rem 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

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

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.95rem;
  color: var(--text-primary-light);
  width: 140px;
}

body.dark-mode .search-box input {
  color: var(--text-primary-dark);
}

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

body.dark-mode .search-box input::placeholder {
  color: var(--text-secondary-dark);
}

.search-box button {
  background: var(--btn-bg-light);
  color: var(--btn-text-light);
  border: none;
  border-radius: var(--radius-full);
  padding: 0.45rem 1rem;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
  font-size: 0.9rem;
}

body.dark-mode .search-box button {
  background: var(--btn-bg-dark);
  color: var(--btn-text-dark);
}

.search-box button:hover {
  transform: scale(1.05);
}

.theme-toggle {
  background: none;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-primary-light);
  background-color: var(--surface-light);
  transition: all 0.3s;
}

body.dark-mode .theme-toggle {
  border-color: var(--border-dark);
  color: var(--text-primary-dark);
  background-color: var(--surface-dark);
}

.theme-toggle:hover {
  transform: rotate(15deg) scale(1.05);
  border-color: var(--accent);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-primary-light);
  cursor: pointer;
  transition: transform 0.3s;
}

body.dark-mode .menu-toggle {
  color: var(--text-primary-dark);
}

@media (max-width: 900px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 1rem 0;
  }

  .nav-links.open {
    display: flex;
  }

  .search-box {
    width: 100%;
    margin-top: 0.5rem;
  }

  .search-box input {
    flex: 1;
    width: auto;
  }
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  color: #fff;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
  text-align: center;
}

body.dark-mode .btn {
  background: linear-gradient(135deg, #60A5FA, #A78BFA);
  color: #0B1120;
  box-shadow: 0 4px 16px rgba(96, 165, 250, 0.2);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
  opacity: 0.95;
}

/* ========== Hero 区域 ========== */
.hero {
  padding: 4rem 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

body.dark-mode .hero {
  background: var(--gradient-hero-dark);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15), transparent 70%);
  pointer-events: none;
}

.hero .container {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  flex: 1 1 300px;
}

.hero-text p {
  font-size: 1.15rem;
  color: var(--text-secondary-light);
  margin-bottom: 1.5rem;
}

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

.hero-badge {
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  color: white;
  padding: 0.35rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  display: inline-block;
  margin-bottom: 1.2rem;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.hero svg {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* ========== 卡片网格 ========== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2.5rem 0;
}

.card {
  background: var(--gradient-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}

body.dark-mode .card {
  background: var(--gradient-card-dark);
  border-color: var(--glass-border-dark);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(59, 130, 246, 0.3);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  margin-top: 0.5rem;
  font-size: 1.3rem;
}

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

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

.card a {
  font-weight: 700;
  color: var(--accent);
}

body.dark-mode .card a {
  color: var(--accent-dark);
}

/* ========== FAQ 样式 ========== */
.faq-item {
  background: var(--faq-bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  padding: 1.2rem 1.5rem;
  transition: all 0.3s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

body.dark-mode .faq-item {
  background: var(--faq-bg-dark);
  border-color: var(--border-dark);
}

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

.faq-question {
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-heading-light);
  transition: color 0.2s;
}

body.dark-mode .faq-question {
  color: var(--text-heading-dark);
}

.faq-question span {
  font-size: 0.9rem;
  transition: transform 0.3s;
  color: var(--accent);
}

.faq-item.open .faq-question span {
  transform: rotate(180deg);
}

.faq-answer {
  margin-top: 0.8rem;
  color: var(--text-primary-light);
  display: none;
  line-height: 1.6;
  animation: fadeInUp 0.3s ease;
}

body.dark-mode .faq-answer {
  color: var(--text-primary-dark);
}

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

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

/* ========== 页脚 ========== */
footer {
  background-color: var(--footer-bg-light);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
  border-top: 1px solid var(--border-light);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.footer-grid h4 {
  color: var(--text-heading-light);
  margin-bottom: 1.2rem;
  font-size: 1.1rem;
}

body.dark-mode .footer-grid h4 {
  color: var(--text-heading-dark);
}

.footer-grid a {
  display: block;
  margin-bottom: 0.6rem;
  color: var(--text-secondary-light);
  transition: color 0.2s, padding-left 0.2s;
}

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

.footer-grid a:hover {
  color: var(--accent);
  padding-left: 4px;
  text-decoration: none;
}

.copyright {
  margin-top: 2rem;
  text-align: center;
  border-top: 1px solid var(--border-light);
  padding-top: 1.5rem;
  color: var(--text-secondary-light);
  font-size: 0.9rem;
}

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

/* ========== 返回顶部 ========== */
.to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  color: #fff;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  border: none;
  z-index: 200;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s;
}

body.dark-mode .to-top {
  background: linear-gradient(135deg, #60A5FA, #A78BFA);
  color: #0B1120;
}

.to-top.show {
  opacity: 1;
  visibility: visible;
}

.to-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.4);
}

/* ========== 文章列表 ========== */
.article-list {
  list-style: none;
  padding: 0;
}

.article-list li {
  margin-bottom: 1.2rem;
  padding: 1rem 1.2rem;
  border-bottom: 1px dashed var(--border-light);
  transition: background 0.2s, transform 0.2s;
  border-radius: var(--radius-sm);
}

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

.article-list li:hover {
  background: rgba(59, 130, 246, 0.05);
  transform: translateX(4px);
}

.article-list a {
  font-weight: 600;
  font-size: 1.05rem;
  display: inline-block;
  margin-right: 1rem;
}

.article-list time {
  color: var(--text-secondary-light);
  font-size: 0.85rem;
  margin-left: 0.5rem;
}

body.dark-mode .article-list time {
  color: var(--text-secondary-dark);
}

.article-list p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary-light);
}

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

/* ========== 徽章 ========== */
.badge {
  background: linear-gradient(135deg, #DBEAFE, #BFDBFE);
  color: #1E3A8A;
  padding: 0.25rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  margin-right: 0.5rem;
  display: inline-block;
  vertical-align: middle;
}

body.dark-mode .badge {
  background: linear-gradient(135deg, #1E3A8A, #1e40af);
  color: #DBEAFE;
}

/* ========== 表格 ========== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--border-light);
  padding: 1rem;
  text-align: left;
  color: var(--text-primary-light);
}

body.dark-mode th,
body.dark-mode td {
  border-color: var(--border-dark);
  color: var(--text-primary-dark);
}

th {
  background: linear-gradient(135deg, #F1F5F9, #E2E8F0);
  font-weight: 700;
  color: var(--text-heading-light);
}

body.dark-mode th {
  background: linear-gradient(135deg, #1E293B, #334155);
  color: var(--text-heading-dark);
}

tr:nth-child(even) {
  background: rgba(59, 130, 246, 0.03);
}

tr:hover {
  background: rgba(59, 130, 246, 0.06);
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s, transform 0.6s;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 响应式优化 ========== */
@media (max-width: 768px) {
  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .hero {
    padding: 3rem 0;
  }

  .hero .container {
    gap: 2rem;
    text-align: center;
  }

  .hero-text {
    flex: 1 1 100%;
  }

  .hero-badge {
    margin-bottom: 1rem;
  }

  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .card {
    padding: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }

  .nav-container {
    padding: 0.6rem 12px;
  }

  .logo {
    font-size: 1.3rem;
  }

  .logo svg {
    width: 30px;
    height: 30px;
  }

  .hero-text p {
    font-size: 1rem;
  }

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

/* ========== 打印样式 ========== */
@media print {
  .navbar,
  .to-top,
  .search-box,
  .theme-toggle,
  .menu-toggle,
  .hero {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .container {
    max-width: 100%;
  }
}

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #60A5FA, #A78BFA);
}

/* ========== 选择文本颜色 ========== */
::selection {
  background: rgba(59, 130, 246, 0.3);
  color: var(--text-heading-light);
}

body.dark-mode ::selection {
  background: rgba(96, 165, 250, 0.3);
  color: var(--text-heading-dark);
}

/* ========== 焦点可见性 ========== */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ========== 工具类 ========== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

/* ========== 渐变Banner ========== */
.gradient-banner {
  background: var(--gradient-banner);
  color: white;
  padding: 2rem;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.gradient-banner::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.15), transparent 70%);
  pointer-events: none;
}

/* ========== 毛玻璃效果工具类 ========== */
.glass {
  background: var(--glass-bg-light);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--radius-lg);
}

body.dark-mode .glass {
  background: var(--glass-bg-dark);
  border-color: var(--glass-border-dark);
}

/* ========== 动画增强 ========== */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.float-animation {
  animation: float 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.pulse-animation {
  animation: pulse 2s ease-in-out infinite;
}

/* ========== 数字动画 ========== */
.counter {
  font-weight: 800;
  font-size: 2rem;
  color: var(--accent);
}

body.dark-mode .counter {
  color: var(--accent-dark);
}

/* ========== 联系表单样式 ========== */
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  font-size: 1rem;
  background: var(--surface-light);
  color: var(--text-primary-light);
  transition: border-color 0.3s, box-shadow 0.3s;
}

body.dark-mode .contact-form input,
body.dark-mode .contact-form textarea {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  color: var(--text-primary-dark);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

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

body.dark-mode .breadcrumb a {
  color: var(--text-secondary-dark);
}

.breadcrumb span {
  color: var(--accent);
}

/* ========== 分页 ========== */
.pagination {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin: 2rem 0;
}

.pagination a {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary-light);
  transition: all 0.2s;
}

body.dark-mode .pagination a {
  border-color: var(--border-dark);
  color: var(--text-primary-dark);
}

.pagination a:hover,
.pagination a.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* ========== 标签 ========== */
.tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.tag {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s;
}

body.dark-mode .tag {
  background: rgba(96, 165, 250, 0.15);
  color: var(--accent-dark);
}

.tag:hover {
  background: var(--accent);
  color: white;
}

/* ========== 视频卡片 ========== */
.video-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #1E293B;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.video-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-card .play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent);
  transition: transform 0.3s;
}

.video-card:hover .play-icon {
  transform: translate(-50%, -50%) scale(1.1);
}

/* ========== 统计区块 ========== */
.stats-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: var(--surface-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s;
}

body.dark-mode .stat-item {
  background: var(--surface-dark);
}

.stat-item:hover {
  transform: translateY(-4px);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  color: var(--text-secondary-light);
  margin-top: 0.5rem;
}

body.dark-mode .stat-label {
  color: var(--text-secondary-dark);
}

/* ========== 加载动画 ========== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(59, 130, 246, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 2rem auto;
}

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

/* ========== 通知消息 ========== */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 1rem 1.5rem;
  background: var(--surface-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--accent);
  z-index: 300;
  animation: slideInRight 0.3s ease;
}

body.dark-mode .toast {
  background: var(--surface-dark);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ========== 无障碍 ========== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
```