/* 高清无码 视频社区 - 全局样式 */
:root {
  --primary: #ff6600;
  --primary-dark: #cc5200;
  --bg-dark: #0f0f14;
  --bg-card: #1a1a24;
  --text-main: #ffffff;
  --text-muted: #a0a0b0;
  --border: #2a2a35;
  --radius: 8px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部导航 */
.header {
  background-color: rgba(15, 15, 20, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo img {
  height: 40px;
}

.nav-menu {
  display: flex;
  gap: 30px;
}

.nav-menu a {
  font-weight: 500;
  font-size: 16px;
  position: relative;
}

.nav-menu a.active {
  color: var(--primary);
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -24px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--primary);
  border-radius: 3px 3px 0 0;
}

/* 搜索框 (假) */
.search-bar {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 15px;
  width: 250px;
}

.search-bar input {
  background: transparent;
  border: none;
  color: var(--text-main);
  outline: none;
  width: 100%;
  font-size: 14px;
}

.search-bar button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 24px;
  cursor: pointer;
}

/* Banner大图 */
.hero {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(15,15,20,0.9) 0%, rgba(15,15,20,0.6) 50%, rgba(15,15,20,0.2) 100%);
  z-index: -1;
}

.hero-content {
  max-width: 600px;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-title span {
  color: var(--primary);
}

.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  text-align: center;
  border: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: #fff;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background-color: rgba(255, 102, 0, 0.1);
}

/* 面包屑 */
.breadcrumb {
  padding: 20px 0;
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.breadcrumb span {
  margin: 0 8px;
}

/* 通用区块 */
.section {
  padding: 60px 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 4px;
  background-color: var(--primary);
  border-radius: 2px;
}

.section-subtitle {
  color: var(--text-muted);
  margin-top: 10px;
  font-size: 16px;
}

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

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.video-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  cursor: pointer;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  background: rgba(255, 102, 0, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.play-btn::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 16px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

.video-thumb:hover .play-btn {
  opacity: 1;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 13px;
}

.video-stats {
  display: flex;
  gap: 12px;
}

/* 团队/专家展示 */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 30px;
}

.team-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  text-align: center;
  padding-bottom: 20px;
}

.team-photo {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.team-info {
  padding: 20px;
}

.team-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 5px;
}

.team-role {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 15px;
}

.team-desc {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 20px;
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-q {
  padding: 20px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-q:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 24px;
  transition: transform 0.3s;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-a {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-muted);
}

.faq-item.active .faq-a {
  padding: 0 20px 20px;
  max-height: 500px;
}

/* 评论区 */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.review-header {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 20px;
  margin-right: 16px;
}

.review-name {
  font-weight: 600;
  font-size: 16px;
}

.review-date {
  color: var(--text-muted);
  font-size: 12px;
}

.review-stars {
  color: #ffc107;
  margin-bottom: 12px;
}

.review-content {
  color: var(--text-muted);
  font-size: 14px;
  font-style: italic;
}

/* 底部 */
.footer {
  background: #0a0a0d;
  border-top: 1px solid var(--border);
  padding: 60px 0 20px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-about p {
  color: var(--text-muted);
  margin-top: 20px;
  font-size: 14px;
}

.footer-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #fff;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 14px;
}

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

.footer-qr {
  display: flex;
  gap: 20px;
}

.qr-box {
  text-align: center;
}

.qr-box img {
  width: 100px;
  height: 100px;
  border-radius: 8px;
  margin-bottom: 8px;
}

.qr-box span {
  font-size: 12px;
  color: var(--text-muted);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 14px;
}

.social-share {
  display: flex;
  gap: 15px;
}

.social-share a {
  color: var(--text-muted);
  cursor: pointer;
}

.social-share a:hover {
  color: var(--primary);
}

/* 响应式 */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--bg-card);
    flex-direction: column;
    padding: 20px;
    gap: 15px;
    border-bottom: 1px solid var(--border);
  }
  
  .nav-menu.show {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .search-bar {
    display: none;
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}