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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #faf6f0;
  color: #3d2c1e;
  line-height: 1.6;
}

/* 导航 */
.navbar {
  background: #faf6f0;
  border-bottom: 1px solid #e8ddd0;
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #3d2c1e;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: #3d2c1e;
  color: #faf6f0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: bold;
}

.logo-text h1 {
  font-size: 18px;
  font-weight: 700;
}

.logo-text p {
  font-size: 12px;
  color: #8b7355;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: #5c4a3a;
  font-size: 15px;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #3d2c1e;
  font-weight: 600;
}

/* Hero */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  color: #5c4a3a;
  margin-bottom: 24px;
  border: 1px solid #e8ddd0;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: #4ade80;
  border-radius: 50%;
}

.hero h2 {
  font-size: 52px;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #3d2c1e;
}

.hero-desc {
  font-size: 17px;
  color: #5c4a3a;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.btn {
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: #3d2c1e;
  color: #faf6f0;
}

.btn-primary:hover {
  background: #2a1d13;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: #3d2c1e;
  border: 2px solid #3d2c1e;
}

.btn-secondary:hover {
  background: #3d2c1e;
  color: #faf6f0;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: #3d2c1e;
}

.stat-label {
  font-size: 14px;
  color: #8b7355;
}

.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-avatar {
  width: 320px;
  height: 320px;
  background: linear-gradient(135deg, #d4c4a8 0%, #c4a882 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 120px;
  font-weight: bold;
  color: #3d2c1e;
  position: relative;
  z-index: 2;
}

.hero-avatar::before {
  content: '';
  position: absolute;
  top: -16px;
  left: -16px;
  right: -16px;
  bottom: -16px;
  border: 2px solid #d4c4a8;
  border-radius: 50%;
  z-index: -1;
}

.hero-avatar::after {
  content: '';
  position: absolute;
  top: -32px;
  left: -32px;
  right: -32px;
  bottom: -32px;
  border: 1px solid #e8ddd0;
  border-radius: 50%;
  z-index: -2;
}

.avatar-caption {
  position: absolute;
  bottom: -60px;
  text-align: center;
  width: 100%;
}

.avatar-caption .name {
  font-size: 20px;
  font-weight: 700;
  color: #3d2c1e;
}

.avatar-caption .title {
  font-size: 14px;
  color: #8b7355;
}

/* 区块通用 */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 32px;
  margin-bottom: 12px;
}

.section-header p {
  color: #8b7355;
  font-size: 16px;
}

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

.video-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 1px solid #e8ddd0;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(61, 44, 30, 0.1);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #d4c4a8 0%, #c4a882 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-thumb .play-icon {
  width: 56px;
  height: 56px;
  background: rgba(61, 44, 30, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
}

.video-thumb .duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.video-info {
  padding: 16px;
}

.video-category {
  font-size: 12px;
  color: #b8860b;
  font-weight: 600;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.video-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  color: #3d2c1e;
}

.video-summary {
  font-size: 13px;
  color: #8b7355;
  line-height: 1.5;
}

.video-date {
  font-size: 12px;
  color: #a89070;
  margin-top: 12px;
}

/* 视频详情页 */
.video-detail {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px;
}

.video-player-wrap {
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 32px;
  aspect-ratio: 16/9;
}

.video-detail h1 {
  font-size: 28px;
  margin-bottom: 16px;
  line-height: 1.3;
}

.video-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  color: #8b7355;
  font-size: 14px;
}

.video-content {
  background: #fff;
  padding: 32px;
  border-radius: 12px;
  border: 1px solid #e8ddd0;
  font-size: 16px;
  line-height: 1.8;
  color: #3d2c1e;
}

.video-content p {
  margin-bottom: 16px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #8b7355;
  text-decoration: none;
  margin-bottom: 24px;
  font-size: 14px;
}

.back-link:hover {
  color: #3d2c1e;
}

/* 分类筛选 */
.category-filter {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.category-btn {
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid #e8ddd0;
  background: #fff;
  color: #5c4a3a;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.category-btn:hover,
.category-btn.active {
  background: #3d2c1e;
  color: #faf6f0;
  border-color: #3d2c1e;
}

/* 关于我 */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  background: #fff;
  padding: 48px;
  border-radius: 12px;
  border: 1px solid #e8ddd0;
}

.about-content h2 {
  font-size: 28px;
  margin-bottom: 24px;
}

.about-content p {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
  color: #3d2c1e;
}

.timeline {
  margin: 32px 0;
  padding-left: 24px;
  border-left: 2px solid #d4c4a8;
}

.timeline-item {
  margin-bottom: 24px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -31px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: #3d2c1e;
  border-radius: 50%;
}

.timeline-year {
  font-size: 14px;
  font-weight: 700;
  color: #b8860b;
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 14px;
  color: #8b7355;
  line-height: 1.6;
}

/* 联系合作 */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  padding: 48px;
  border-radius: 12px;
  border: 1px solid #e8ddd0;
  text-align: center;
}

.contact-content h2 {
  font-size: 28px;
  margin-bottom: 16px;
}

.contact-content > p {
  color: #8b7355;
  margin-bottom: 32px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: #faf6f0;
  border-radius: 8px;
  border: 1px solid #e8ddd0;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: #3d2c1e;
  color: #faf6f0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-info h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.contact-info p {
  font-size: 14px;
  color: #8b7355;
}

/* 页脚 */
.footer {
  background: #3d2c1e;
  color: #d4c4a8;
  padding: 48px 24px 24px;
  margin-top: 80px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand h3 {
  color: #faf6f0;
  font-size: 18px;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  color: #a89070;
}

.footer-col h4 {
  color: #faf6f0;
  font-size: 14px;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: #a89070;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #faf6f0;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid #5c4a3a;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: #8b7355;
}

.footer-bottom a {
  color: #a89070;
  text-decoration: none;
}

.footer-bottom a:hover {
  color: #faf6f0;
}

/* 响应式 */
@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 40px 24px;
    text-align: center;
  }

  .hero h2 {
    font-size: 36px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-avatar {
    width: 240px;
    height: 240px;
    font-size: 80px;
  }

  .nav-links {
    display: none;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .about-content,
  .contact-content {
    padding: 32px 24px;
  }
}