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

:root {
  --primary-color: #00C75A;
  --text-color: #333;
  --bg-color: #fff;
  --card-bg: #f9f9f9;
  --border-color: #e0e0e0;
  --hover-color: #00a849;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
}

body.ui-style-10 {
  --primary-color: #00C75A;
  --hover-color: #00a849;
}

.main-nav {
  background: #fff;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.nav-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo a {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

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

.home-main, .list-main, .detail-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.hero-section {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(135deg, #00C75A 0%, #00a849 100%);
  border-radius: 16px;
  margin-bottom: 40px;
}

.hero-title {
  font-size: 32px;
  color: white;
  font-weight: 700;
  line-height: 1.4;
}

.site-intro {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.video-section {
  margin-bottom: 60px;
}

.section-title {
  font-size: 28px;
  margin-bottom: 30px;
  font-weight: 700;
  color: var(--text-color);
  border-left: 4px solid var(--primary-color);
  padding-left: 15px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.1);
}

.video-card__link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.video-cover {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  overflow: hidden;
  background: #e0e0e0;
}

.video-cover img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.video-one-line {
  font-size: 14px;
  color: #666;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.page-header {
  margin-bottom: 40px;
}

.page-header h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-color);
}

.layout__wrapper {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 40px;
}

.layout__side--filters {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  height: fit-content;
}

.filter-section h3 {
  margin-bottom: 10px;
  color: var(--primary-color);
}

.top-list__items {
  list-style: none;
}

.top-item {
  display: flex;
  gap: 20px;
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.top-rank {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-color);
  min-width: 50px;
}

.top-cover {
  width: 120px;
  height: 180px;
  flex-shrink: 0;
  border-radius: 8px;
  overflow: hidden;
}

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

.top-info {
  flex: 1;
}

.top-title a {
  font-size: 20px;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-color);
}

.top-title a:hover {
  color: var(--primary-color);
}

.top-meta {
  color: #666;
  margin: 8px 0;
}

.top-desc {
  color: #666;
  line-height: 1.6;
}

.group {
  margin-bottom: 50px;
}

.group__title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-color);
  border-left: 4px solid var(--primary-color);
  padding-left: 15px;
}

.group__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-player-section {
  margin-bottom: 40px;
}

.video-player {
  max-width: 900px;
  margin: 0 auto;
}

.video-player-inner {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
}

.player-play-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(0, 199, 90, 0.9);
  border: none;
  cursor: pointer;
  transition: all 0.3s;
}

.player-play-btn:hover {
  background: rgba(0, 199, 90, 1);
  transform: translate(-50%, -50%) scale(1.1);
}

.player-play-icon {
  color: white;
  font-size: 32px;
  display: block;
  margin-left: 5px;
}

.detail-header {
  text-align: center;
  margin-bottom: 40px;
}

.detail-header h1 {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-color);
}

.detail-info, .detail-module, .related-section {
  background: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  margin-bottom: 30px;
}

.detail-info h2, .detail-module h2, .related-section h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-color);
  border-left: 4px solid var(--primary-color);
  padding-left: 15px;
}

.info-list {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 15px;
  line-height: 1.8;
}

.info-list dt {
  font-weight: 600;
  color: #666;
}

.info-list dd {
  color: var(--text-color);
}

.detail-module p {
  line-height: 1.8;
  color: #444;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  background: var(--primary-color);
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 14px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card--related {
  background: white;
}

.main-footer {
  background: #2c2c2c;
  color: white;
  text-align: center;
  padding: 30px 20px;
  margin-top: 60px;
}

@media (max-width: 768px) {
  .nav-links {
    gap: 15px;
    font-size: 14px;
  }

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

  .hero-title {
    font-size: 24px;
  }

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

  .video-cover {
    padding-top: 50%;
  }

  .video-title {
    font-size: 16px;
  }

  .video-one-line {
    font-size: 13px;
  }

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

  .top-item {
    flex-direction: column;
  }

  .top-cover {
    width: 100%;
    height: auto;
    padding-top: 56.25%;
    position: relative;
  }

  .top-cover img {
    position: absolute;
    top: 0;
    left: 0;
  }

  .detail-header h1 {
    font-size: 28px;
  }

  .section-title {
    font-size: 24px;
  }
}