/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
}

a {
  color: #0066cc;
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: #004499;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* 头部与导航 */
header {
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  text-align: center;
  padding: 1.5rem 0;
  font-size: 1.8rem;
  font-weight: bold;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
}

.logo a {
  color: #fff;
}

.main-nav {
  background: #1a1a1a;
}

.nav-container {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-container a {
  flex: 1 1 0;
  min-width: 0;
  padding: 1rem 0.5rem;
  color: #fff;
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.3s;
  border-right: 1px solid #333;
}

.nav-container a:last-child {
  border-right: none;
}

.nav-container a:hover,
.nav-container a.active {
  background: #333;
}

/* 移动端导航 */
@media (max-width: 768px) {
  .logo {
    font-size: 1.4rem;
    padding: 1rem 0;
  }

  .nav-container {
    flex-wrap: nowrap;
  }

  .nav-container a {
    padding: 0.8rem 0.3rem;
    font-size: 0.85rem;
  }
}

/* 首页样式 */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  text-align: center;
  padding: 3rem 1rem;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.hero .subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
}

.intro-section {
  background: #fff;
  margin: 2rem 0;
  padding: 2rem 0;
}

.intro-section h2 {
  margin-bottom: 1rem;
  color: #667eea;
}

.intro-section p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

.quick-links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.quick-links a {
  padding: 0.6rem 1.2rem;
  background: #667eea;
  color: #fff;
  border-radius: 4px;
  transition: background 0.3s;
}

.quick-links a:hover {
  background: #764ba2;
}

/* 卡片网格 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.video-card {
  background: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.video-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.video-card .meta {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
  color: #666;
}

.video-card .one-line {
  color: #555;
  font-size: 0.95rem;
}

/* 列表样式 */
.video-list {
  margin-top: 1.5rem;
}

.video-item {
  background: #fff;
  padding: 1.2rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.video-item h4 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.video-item p {
  color: #666;
  font-size: 0.95rem;
}

.more-link {
  text-align: center;
  margin-top: 2rem;
}

.more-link a {
  font-size: 1.1rem;
  font-weight: bold;
}

/* 列表页 */
.video-list-full {
  margin-top: 2rem;
}

.list-item {
  background: #fff;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  position: relative;
}

.list-item .rank,
.list-item .tag,
.list-item .year {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: #667eea;
  color: #fff;
  border-radius: 4px;
  font-size: 0.9rem;
  margin-right: 0.8rem;
  margin-bottom: 0.5rem;
}

.list-item h3 {
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.list-item .meta {
  display: flex;
  gap: 1rem;
  margin: 0.5rem 0;
  font-size: 0.9rem;
  color: #666;
}

.list-item p {
  color: #555;
  line-height: 1.7;
}

/* 详情页 */
.detail-page h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #333;
}

.detail-page section {
  background: #fff;
  padding: 2rem;
  margin-bottom: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.detail-page h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #667eea;
  border-left: 4px solid #667eea;
  padding-left: 0.8rem;
}

.basic-info ul {
  list-style: none;
}

.basic-info li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #eee;
}

.basic-info li:last-child {
  border-bottom: none;
}

.summary p,
.review p,
.one-line p {
  line-height: 1.8;
  color: #444;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.related-card {
  background: #f9f9f9;
  padding: 1.2rem;
  border-radius: 6px;
  transition: background 0.3s;
}

.related-card:hover {
  background: #f0f0f0;
}

.related-card h4 {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

.related-card p {
  color: #666;
  font-size: 0.9rem;
}

/* 页脚 */
footer {
  background: #1a1a1a;
  color: #fff;
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 3rem;
}

footer p {
  opacity: 0.8;
}

/* 分段样式 */
.hot-section,
.ranking-section,
.new-section {
  padding: 2rem 0;
}

.hot-section {
  background: #fff;
}

.ranking-section {
  background: #f9f9f9;
}

.new-section {
  background: #fff;
}

.ranking-intro {
  margin-top: 1rem;
  line-height: 1.8;
}

.ranking-intro p {
  margin-bottom: 0.8rem;
}

.page-desc {
  background: #f9f9f9;
  padding: 1rem 1.5rem;
  border-left: 4px solid #667eea;
  margin-bottom: 2rem;
  line-height: 1.7;
}

/* 响应式 */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 1.5rem;
  }

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

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

  .quick-links {
    flex-direction: column;
  }

  .quick-links a {
    text-align: center;
  }
}