```css
/* ===== 全局变量与重置 ===== */
:root {
  /* 主色调 - 汤姆影院紫罗兰主题 */
  --primary: #7B2D8E;
  --primary-light: #9B4DBA;
  --primary-dark: #5C1F6E;
  --accent: #FF6B6B;
  --accent-secondary: #FFD93D;
  --bg-dark: #0F0F1A;
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.12);
  --text-primary: #F5F5F7;
  --text-secondary: #A0A0B0;
  --text-muted: #6E6E80;
  --border: rgba(255, 255, 255, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 12px 48px rgba(123, 45, 142, 0.3);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.15);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* 亮色模式变量 */
@media (prefers-color-scheme: light) {
  :root {
    --bg-dark: #F8F9FC;
    --bg-card: rgba(0, 0, 0, 0.03);
    --bg-card-hover: rgba(0, 0, 0, 0.06);
    --text-primary: #1A1A2E;
    --text-secondary: #4A4A6A;
    --text-muted: #8A8AA0;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 12px 48px rgba(123, 45, 142, 0.15);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-main);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.5s ease, color 0.3s ease;
  background-image: 
    radial-gradient(ellipse at 20% 50%, rgba(123, 45, 142, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(255, 107, 107, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  border: 2px solid var(--bg-dark);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
}

/* ===== 导航栏 ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: var(--transition);
}

header nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo h1 {
  font-size: 1.8rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  position: relative;
}

.logo h1::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  border-radius: 3px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.logo h1:hover::after {
  transform: scaleX(1);
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 50px;
  position: relative;
  transition: var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-links a:hover::after {
  width: 60%;
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--text-primary);
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.mobile-menu-toggle:hover {
  background: var(--bg-card);
}

/* ===== 主内容区 ===== */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 100px 24px 40px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  position: relative;
}

/* ===== 章节通用样式 ===== */
section {
  margin-bottom: 48px;
  animation: fadeInUp 0.6s ease both;
}

section h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 32px;
  position: relative;
  display: inline-block;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

section h2::before {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 40px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  border-radius: 4px;
}

/* ===== 热门漫画卡片网格 ===== */
.comic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}

.comic-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  animation: fadeInUp 0.6s ease both;
  animation-delay: calc(var(--i, 0) * 0.05s);
}

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

.comic-card:hover {
  transform: translateY(-8px) scale(1.02);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

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

.comic-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 5/7;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  transition: transform 0.4s ease;
}

.comic-card:hover img {
  transform: scale(1.05);
}

.comic-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.comic-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  line-height: 1.4;
}

.comic-card span {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 50px;
  margin-top: 8px;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* ===== 精品推荐卡片 ===== */
.recommend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.recommend-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.recommend-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.recommend-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.recommend-card:hover::after {
  opacity: 1;
}

.recommend-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  transition: transform 0.5s ease;
}

.recommend-card:hover img {
  transform: scale(1.03);
}

.recommend-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.recommend-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}

/* ===== 详细介绍 ===== */
.detail-content {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.detail-content img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.detail-content h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.detail-content h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 20px 0 12px;
  color: var(--text-primary);
  position: relative;
  padding-left: 16px;
}

.detail-content h4::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, var(--primary-light), var(--accent));
  border-radius: 4px;
}

.detail-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

/* ===== 角色卡片 ===== */
.character-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.character-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.character-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-hover);
}

.character-card img {
  width: 150px;
  height: 150px;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid transparent;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  background-clip: padding-box;
  -webkit-background-clip: padding-box;
  transition: transform 0.4s ease, border-color 0.4s ease;
  padding: 3px;
}

.character-card:hover img {
  transform: scale(1.05) rotate(5deg);
  border-color: var(--primary-light);
}

.character-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.character-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  line-height: 1.5;
}

/* ===== 平台介绍 ===== */
.platform-content {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.platform-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.platform-content h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-primary);
  position: relative;
  padding-left: 16px;
}

.platform-content h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, var(--primary-light), var(--accent));
  border-radius: 4px;
}

/* ===== APP下载 ===== */
.app-content {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.app-content::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  animation: rotate 20s linear infinite;
}

.app-content img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 32px;
  margin: 0 auto 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  border: 4px solid rgba(255, 255, 255, 0.2);
  position: relative;
  z-index: 1;
}

.app-content h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.app-content p {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 12px;
  opacity: 0.9;
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.app-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 24px;
  position: relative;
  z-index: 1;
  flex-wrap: wrap;
}

.btn {
  background: white;
  color: var(--primary);
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  display: inline-block;
  border: 2px solid transparent;
}

.btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  background: var(--accent);
  color: white;
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

/* ===== 用户评论 ===== */
.comments-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.comment-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.comment-item:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.comment-item p:first-child {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.comment-item strong {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.comment-item span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.comment-item p:last-child {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 侧边栏 ===== */
.sidebar {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky;
  top: 90px;
  height: fit-content;
  animation: fadeInRight 0.6s ease both;
}

.sidebar h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 12px;
  background: none;
  -webkit-text-fill-color: var(--text-primary);
}

.sidebar h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  border-radius: 3px;
}

.sidebar h2::before {
  display: none;
}

.sidebar ul {
  list-style: none;
  margin-bottom: 32px;
}

.sidebar ul li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
  padding-left: 8px;
  border-radius: 8px;
}

.sidebar ul li:hover {
  color: var(--primary-light);
  padding-left: 16px;
  background: var(--bg-card);
  border-bottom-color: transparent;
}

.sidebar ul li:last-child {
  border-bottom: none;
}

.stats {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 16px;
}

.stats p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
}

.stats p:last-child {
  border-bottom: none;
}

.stats p::after {
  content: '📊';
  opacity: 0.6;
}

/* ===== 页脚 ===== */
footer {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--glass-border);
  margin-top: 48px;
  padding: 48px 24px 24px;
}

.footer-links {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 24px;
}

.footer-links h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  max-width: 800px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-light);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.copyright {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  max-width: 1400px;
  margin: 0 auto;
}

.copyright p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}

/* ===== 动画关键帧 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* ===== 滚动动画 ===== */
@media (prefers-reduced-motion: no-preference) {
  section {
    animation: fadeInUp 0.6s ease both;
  }

  .comic-card,
  .recommend-card,
  .character-card,
  .comment-item {
    animation: fadeInUp 0.6s ease both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
  main {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    margin-top: 32px;
  }
}

@media (max-width: 768px) {
  header nav {
    padding: 0 16px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px;
    gap: 8px;
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
  }

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

  .nav-links a {
    width: 100%;
    text-align: center;
    padding: 12px;
    border-radius: 8px;
  }

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

  main {
    padding: 90px 16px 32px;
  }

  section h2 {
    font-size: 1.5rem;
  }

  .comic-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
  }

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

  .character-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
  }

  .comments-list {
    grid-template-columns: 1fr;
  }

  .app-content {
    padding: 24px;
  }

  .app-content img {
    width: 150px;
    height: 150px;
  }

  .app-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .detail-content {
    padding: 20px;
  }

  .detail-content h3 {
    font-size: 1.4rem;
  }

  .platform-content {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .comic-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .comic-card {
    padding: 12px;
  }

  .comic-card h3 {
    font-size: 0.95rem;
  }

  .comic-card p {
    font-size: 0.75rem;
  }

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

  .character-card {
    padding: 16px;
  }

  .character-card img {
    width: 100px;
    height: 100px;
  }

  .footer-links ul {
    gap: 8px;
  }

  .footer-links a {
    font-size: 0.8rem;
    padding: 6px 12px;
  }
}

/* ===== 暗色模式增强 ===== */
@media (prefers-color-scheme: dark) {
  .comic-card,
  .character-card,
  .comment-item {
    background: var(--bg-card);
  }

  .comic-card:hover,
  .character-card:hover,
  .comment-item:hover {
    background: var(--bg-card-hover);
  }
}

/* ===== 交互效果增强 ===== */
.comic-card,
.recommend-card,
.character-card,
.comment-item {
  will-change: transform, box-shadow;
}

/* 悬停时的微光效果 */
.comic-card::after,
.recommend-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.comic-card:hover::after,
.recommend-card:hover::after {
  opacity: 1;
}

/* 链接下划线动画 */
.sidebar ul li,
.footer-links a {
  position: relative;
}

.sidebar ul li::before,
.footer-links a::before {
  content: '▸';
  position: absolute;
  left: -12px;
  opacity: 0;
  transition: all 0.3s ease;
}

.sidebar ul li:hover::before,
.footer-links a:hover::before {
  left: -4px;
  opacity: 1;
}

/* 统计数字动画 */
.stats p {
  transition: all 0.3s ease;
}

.stats p:hover {
  letter-spacing: 0.5px;
}

/* 图片懒加载效果 */
img[loading="lazy"] {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s ease infinite;
}

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

/* 打印样式 */
@media print {
  header,
  footer,
  .sidebar,
  .app-buttons {
    display: none;
  }

  main {
    padding: 0;
  }

  body {
    background: white;
    color: black;
  }

  section {
    break-inside: avoid;
  }
}
```