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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
}

body.ui-style-10 {
  --primary-color: #00C75A;
  --primary-dark: #00a048;
  --bg-color: #ffffff;
  --text-color: #333333;
  --border-color: #e0e0e0;
  --card-shadow: 0 2px 8px rgba(0,199,90,0.1);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

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

.nav {
  display: flex;
  gap: 8px;
  flex-wrap: nowrap;
  overflow-x: visible;
}

.nav a {
  padding: 8px 16px;
  color: var(--text-color);
  text-decoration: none;
  border-radius: 20px;
  transition: all 0.3s;
  white-space: nowrap;
  font-size: 14px;
}

.nav a:hover,
.nav a.active {
  background: var(--primary-color);
  color: white;
}

main {
  min-height: calc(100vh - 200px);
  padding: 40px 0;
}

.hero-section {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  border-radius: 16px;
  margin-bottom: 40px;
  overflow: hidden;
  padding: 60px 40px;
}

.hero-content {
  text-align: center;
  color: white;
  max-width: 800px;
  z-index: 2;
}

.hero-content h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-content p {
  font-size: 18px;
  opacity: 0.95;
  line-height: 1.8;
}

.section {
  margin-bottom: 60px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-color);
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: var(--primary-color);
  border-radius: 2px;
}

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

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

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0,199,90,0.15);
}

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

.video-cover {
  position: relative;
  width: 100%;
  padding-top: 140%;
  overflow: hidden;
  background: #f0f0f0;
}

.video-cover img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

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

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-color);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.4;
  min-height: 44px;
}

.video-meta {
  display: flex;
  gap: 12px;
  font-size: 13px;
  color: #666;
  flex-wrap: wrap;
}

.video-one-line {
  font-size: 14px;
  color: #666;
  margin-top: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.5;
}

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

.video-player {
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.video-player-inner {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

.player-play-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: var(--primary-color);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 16px rgba(0,199,90,0.3);
}

.player-play-btn:hover {
  transform: translate(-50%, -50%) scale(1.1);
  box-shadow: 0 6px 20px rgba(0,199,90,0.4);
}

.player-play-icon {
  color: white;
  font-size: 32px;
  line-height: 1;
  display: inline-block;
  margin-left: 4px;
}

.detail-header {
  margin-bottom: 32px;
}

.detail-header h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.info-card {
  background: white;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 32px;
  box-shadow: var(--card-shadow);
}

.info-card h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-color);
}

.info-grid {
  display: grid;
  gap: 12px;
}

.info-item {
  display: flex;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.info-label {
  width: 100px;
  font-weight: 600;
  color: #666;
  flex-shrink: 0;
}

.info-value {
  flex: 1;
  color: var(--text-color);
}

.content-section {
  background: white;
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 32px;
  box-shadow: var(--card-shadow);
}

.content-section h2 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-color);
}

.content-section p {
  font-size: 16px;
  line-height: 1.8;
  color: #444;
  margin-bottom: 16px;
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag {
  padding: 6px 16px;
  background: rgba(0,199,90,0.1);
  color: var(--primary-color);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
}

.related-section {
  margin-top: 60px;
}

.related-section h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
}

.video-card--related .video-cover {
  padding-top: 140%;
}

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

.page-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-color);
}

.page-description {
  font-size: 16px;
  color: #666;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

.filter-bar {
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 32px;
  box-shadow: var(--card-shadow);
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  padding: 20px 0;
}

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

.top-list__item {
  counter-increment: top-counter;
  background: white;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--card-shadow);
  display: flex;
  gap: 20px;
  align-items: center;
  transition: all 0.3s;
}

.top-list__item:hover {
  transform: translateX(4px);
  box-shadow: 0 4px 12px rgba(0,199,90,0.15);
}

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

.top-list__item:nth-child(1) .top-rank {
  color: #FFD700;
}

.top-list__item:nth-child(2) .top-rank {
  color: #C0C0C0;
}

.top-list__item:nth-child(3) .top-rank {
  color: #CD7F32;
}

.top-cover {
  width: 100px;
  height: 140px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

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

.top-info {
  flex: 1;
}

.top-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-color);
}

.top-meta {
  font-size: 14px;
  color: #666;
  margin-bottom: 8px;
}

.top-desc {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
}

.group {
  margin-bottom: 48px;
}

.group__header {
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-color);
}

.group__title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-color);
}

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

footer {
  background: #2d2d2d;
  color: #ccc;
  padding: 40px 0 20px;
  margin-top: 60px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #ccc;
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-text {
  font-size: 14px;
  color: #999;
}

.back-to-top {
  position: fixed;
  right: 30px;
  bottom: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  box-shadow: 0 4px 12px rgba(0,199,90,0.3);
  font-size: 20px;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0,199,90,0.4);
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 12px;
    padding: 12px 16px;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 4px;
  }

  .nav a {
    padding: 6px 10px;
    font-size: 13px;
  }

  .hero-section {
    padding: 40px 20px;
    min-height: 300px;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-content p {
    font-size: 15px;
  }

  .section-title {
    font-size: 22px;
  }

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

  .video-cover {
    padding-top: 140%;
  }

  .video-info {
    padding: 12px;
  }

  .video-title {
    font-size: 14px;
    min-height: 40px;
  }

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

  .detail-header h1 {
    font-size: 24px;
  }

  .content-section {
    padding: 20px;
  }

  .top-list__item {
    flex-direction: column;
    text-align: center;
  }

  .top-rank {
    font-size: 24px;
  }

  .page-title {
    font-size: 28px;
  }
}