/* 国产自拍 - 主样式表 | 8869.cn */
/* 原创设计，版权所有 © 2026 国产自拍影视传媒 */

:root {
  --primary: #C0392B;
  --primary-dark: #96281B;
  --primary-light: #E74C3C;
  --secondary: #2C3E50;
  --accent: #F39C12;
  --bg-dark: #1A1A2E;
  --bg-card: #16213E;
  --bg-light: #F8F9FA;
  --text-main: #2D2D2D;
  --text-muted: #6C757D;
  --text-light: #FFFFFF;
  --border: #E0E0E0;
  --shadow: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-hover: 0 8px 32px rgba(192,57,43,0.22);
  --radius: 10px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', 'Hiragino Sans GB', sans-serif;
  color: var(--text-main);
  background: #fff;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }

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

ul, ol { list-style: none; }

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

/* ===== 顶部公告栏 ===== */
.top-bar {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 6px 20px;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.top-bar a { color: #FFD700; font-weight: 600; }

/* ===== 头部导航 ===== */
.site-header {
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.site-logo img { height: 44px; width: auto; }
.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 2px;
}
.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
  letter-spacing: 1px;
}

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--text-main);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  background: var(--primary);
  color: #fff;
}

/* 汉堡菜单 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  transition: var(--transition);
}

/* ===== 搜索框 ===== */
.search-bar-wrap {
  background: #F5F5F5;
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
}
.search-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.search-form {
  display: flex;
  align-items: center;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  width: 100%;
  max-width: 600px;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--primary); }
.search-form input {
  flex: 1;
  border: none;
  outline: none;
  padding: 9px 18px;
  font-size: 14px;
  background: transparent;
  color: var(--text-main);
}
.search-form button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 9px 22px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.search-form button:hover { background: var(--primary-dark); }
.search-hot { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); flex-wrap: wrap; }
.search-hot span { color: var(--text-muted); }
.search-hot a {
  color: var(--primary);
  font-size: 12px;
  background: rgba(192,57,43,0.08);
  padding: 2px 10px;
  border-radius: 12px;
}
.search-hot a:hover { background: var(--primary); color: #fff; }

/* ===== 面包屑 ===== */
.breadcrumb {
  background: #F8F8F8;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.breadcrumb ol { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.breadcrumb li { color: var(--text-muted); }
.breadcrumb li + li::before { content: '›'; margin-right: 6px; color: #bbb; }
.breadcrumb a { color: var(--primary); }

/* ===== 英雄区 ===== */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.55;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.9) 0%, rgba(192,57,43,0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 700px;
  padding: 60px 20px;
}
.hero-badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 1px;
  font-weight: 600;
}
.hero-content h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.hero-content h1 em { color: var(--accent); font-style: normal; }
.hero-desc {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 12px 32px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 700;
  border: 2px solid var(--primary);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-outline {
  background: transparent;
  color: #fff;
  padding: 12px 32px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 700;
  border: 2px solid rgba(255,255,255,0.7);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-outline:hover { background: rgba(255,255,255,0.15); color: #fff; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat strong { display: block; font-size: 28px; font-weight: 900; color: var(--accent); }
.hero-stat span { font-size: 12px; opacity: 0.8; }

/* ===== 通用区块标题 ===== */
.section { padding: 64px 0; }
.section-alt { background: var(--bg-light); }
.section-dark { background: var(--bg-dark); color: #fff; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  background: rgba(192,57,43,0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 1px;
  border: 1px solid rgba(192,57,43,0.2);
}
.section-title {
  font-size: clamp(22px, 3.5vw, 36px);
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-dark .section-title { color: #fff; }
.section-title span { color: var(--primary); }
.section-desc { font-size: 15px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.section-dark .section-desc { color: rgba(255,255,255,0.7); }

/* ===== 视频卡片 ===== */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.video-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #111;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
  opacity: 0;
}
.video-card:hover .play-btn { opacity: 1; background: rgba(0,0,0,0.35); }
.play-icon {
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(192,57,43,0.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  border-left: 18px solid #fff;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  padding: 2px 10px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 16px; }
.video-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta { display: flex; align-items: center; gap: 14px; font-size: 12px; color: var(--text-muted); flex-wrap: wrap; }
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-meta .views::before { content: '▶'; font-size: 10px; }
.video-meta .likes::before { content: '♥'; font-size: 10px; color: var(--primary); }
.video-meta .comments::before { content: '💬'; font-size: 10px; }
.video-author { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}
.author-name { font-size: 12px; color: var(--text-muted); }

/* ===== 分类标签栏 ===== */
.category-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.cat-tab {
  padding: 7px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--border);
  background: #fff;
  color: var(--text-muted);
  transition: var(--transition);
}
.cat-tab:hover, .cat-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ===== 专家卡片 ===== */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 28px; }
.expert-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.expert-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: top;
}
.expert-body { padding: 20px; }
.expert-name { font-size: 18px; font-weight: 800; color: var(--secondary); margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.expert-tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 14px; }
.expert-tag {
  font-size: 11px;
  background: rgba(192,57,43,0.08);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 12px;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  font-size: 12px;
  padding: 6px 16px;
  border-radius: 20px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid var(--primary);
}
.btn-sm-primary { background: var(--primary); color: #fff; }
.btn-sm-primary:hover { background: var(--primary-dark); }
.btn-sm-outline { background: transparent; color: var(--primary); }
.btn-sm-outline:hover { background: var(--primary); color: #fff; }

/* ===== AI赋能区 ===== */
.ai-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.ai-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.ai-card:hover { background: rgba(255,255,255,0.1); border-color: var(--primary); transform: translateY(-4px); }
.ai-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.ai-card h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.ai-card p { font-size: 14px; color: rgba(255,255,255,0.7); line-height: 1.7; }

/* ===== 用户评价 ===== */
.review-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.review-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.review-stars { color: var(--accent); font-size: 16px; margin-bottom: 12px; letter-spacing: 2px; }
.review-text { font-size: 14px; color: var(--text-main); line-height: 1.8; margin-bottom: 16px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}
.review-name { font-size: 14px; font-weight: 700; color: var(--secondary); }
.review-date { font-size: 12px; color: var(--text-muted); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-q {
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 700;
  color: var(--secondary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  background: #fff;
}
.faq-q:hover { background: rgba(192,57,43,0.04); color: var(--primary); }
.faq-q.open { background: var(--primary); color: #fff; }
.faq-q .arrow { font-size: 18px; transition: var(--transition); }
.faq-q.open .arrow { transform: rotate(180deg); }
.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  background: #FAFAFA;
}
.faq-a.open { max-height: 300px; padding: 16px 24px; }

/* ===== 合作品牌 ===== */
.partner-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-item:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow); }

/* ===== 联系区 ===== */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 28px; }
.contact-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  text-align: center;
}
.contact-icon { font-size: 36px; margin-bottom: 14px; }
.contact-card h3 { font-size: 17px; font-weight: 700; color: var(--secondary); margin-bottom: 8px; }
.contact-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.contact-card a { color: var(--primary); font-weight: 600; }
.qr-img { width: 120px; height: 120px; margin: 12px auto 0; border-radius: 8px; }

/* ===== 社区功能 ===== */
.community-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 20px; }
.community-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 3px solid transparent;
}
.community-card:hover { border-top-color: var(--primary); transform: translateY(-4px); }
.community-card .icon { font-size: 32px; margin-bottom: 12px; }
.community-card h4 { font-size: 15px; font-weight: 700; color: var(--secondary); margin-bottom: 6px; }
.community-card p { font-size: 12px; color: var(--text-muted); }

/* ===== 分享按钮 ===== */
.share-section { text-align: center; padding: 32px 0; }
.share-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  color: #fff;
}
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #000; }
.share-bilibili { background: #00A1D6; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-text { color: #fff; font-size: 24px; }
.footer-brand p { font-size: 13px; line-height: 1.8; margin-top: 12px; color: rgba(255,255,255,0.6); }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 13px; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary); }
.footer-qr { display: flex; gap: 20px; margin-top: 16px; }
.footer-qr-item { text-align: center; }
.footer-qr-item img { width: 80px; height: 80px; border-radius: 6px; margin-bottom: 6px; }
.footer-qr-item span { font-size: 11px; color: rgba(255,255,255,0.5); }
.footer-bottom {
  padding: 20px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--primary); }
.update-time { color: rgba(255,255,255,0.5); font-size: 12px; margin-top: 6px; }

/* ===== 内页通用 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--secondary) 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 { font-size: clamp(24px, 4vw, 42px); font-weight: 900; margin-bottom: 12px; }
.page-hero p { font-size: 15px; opacity: 0.8; max-width: 600px; margin: 0 auto; }
.page-content { padding: 60px 0; }

/* ===== 图文卡片 ===== */
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.photo-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}
.photo-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.photo-card img { width: 100%; aspect-ratio: 3/4; object-fit: cover; transition: transform 0.4s; }
.photo-card:hover img { transform: scale(1.05); }
.photo-caption { padding: 12px; background: #fff; font-size: 13px; font-weight: 600; color: var(--text-main); }

/* ===== 统计数字 ===== */
.stats-bar {
  background: var(--primary);
  color: #fff;
  padding: 32px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-item strong { display: block; font-size: 36px; font-weight: 900; }
.stat-item span { font-size: 13px; opacity: 0.85; }

/* ===== 加载更多 ===== */
.load-more { text-align: center; margin-top: 40px; }
.btn-load {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 12px 40px;
  border-radius: 28px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.btn-load:hover { background: var(--primary); color: #fff; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: #fff; padding: 16px; box-shadow: 0 8px 24px rgba(0,0,0,0.12); z-index: 999; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; border-radius: 8px; }
  .nav-toggle { display: flex; }
  .header-inner { position: relative; }
  .hero-section { min-height: 380px; }
  .hero-stats { gap: 20px; }
  .hero-stat strong { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .search-hot { display: none; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 40px 0; }
  .video-grid { grid-template-columns: 1fr; }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.6s ease both; }
.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
.fade-in-delay-3 { animation-delay: 0.3s; }

/* ===== 懒加载占位 ===== */
img[data-src] { background: #eee; min-height: 100px; }

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }