/* ============================================
   每日大赛 - 主样式文件
   Brand: 每日大赛 | Domain: qkfqzvr.cn
   ============================================ */

/* CSS变量 */
:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #e84118;
  --accent2: #f39c12;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-card: #ffffff;
  --border: #e9ecef;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(232,65,24,0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
  --font-main: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', sans-serif;
}

/* 重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--text);
  background: var(--bg-light);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ============ 顶部公告栏 ============ */
.top-bar {
  background: var(--primary);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 6px 0;
  text-align: center;
}
.top-bar a { color: var(--accent2); }

/* ============ 导航 ============ */
.site-header {
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  height: 42px;
  width: auto;
}
.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.logo-text span { color: var(--accent); }

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  transition: var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
  background: var(--accent);
  color: var(--white);
}

/* 头部右侧 */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-login {
  padding: 8px 20px;
  border: 2px solid var(--accent);
  border-radius: 20px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-login:hover {
  background: var(--accent);
  color: var(--white);
}
.btn-publish {
  padding: 8px 20px;
  background: var(--accent);
  border-radius: 20px;
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-publish:hover {
  background: #c0392b;
  transform: translateY(-1px);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============ 搜索框 ============ */
.search-bar-wrap {
  background: #f0f2f5;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-form {
  display: flex;
  flex: 1;
  max-width: 640px;
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
}
.search-form:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232,65,24,0.1);
}
.search-form input {
  flex: 1;
  padding: 10px 18px;
  font-size: 14px;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-main);
}
.search-form button {
  padding: 10px 20px;
  background: var(--accent);
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.search-form button:hover { background: #c0392b; }
.search-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.search-tags a {
  font-size: 12px;
  color: var(--text-light);
  padding: 3px 10px;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.search-tags a:hover { color: var(--accent); border-color: var(--accent); }

/* ============ 面包屑 ============ */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 20px;
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: #ccc; }
.breadcrumb .current { color: var(--text); }

/* ============ 英雄区 ============ */
.hero-section {
  position: relative;
  background: var(--primary);
  overflow: hidden;
  min-height: 480px;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner_hero.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.45;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(26,26,46,0.6) 60%, transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 20px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,65,24,0.2);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 13px;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.hero-content h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero-content h1 .brand { color: var(--accent); }
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  max-width: 560px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-hero-primary {
  padding: 14px 32px;
  background: var(--accent);
  color: var(--white);
  border-radius: 28px;
  font-size: 16px;
  font-weight: 700;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.btn-hero-primary:hover {
  background: #c0392b;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,65,24,0.4);
}
.btn-hero-secondary {
  padding: 14px 32px;
  border: 2px solid rgba(255,255,255,0.5);
  color: var(--white);
  border-radius: 28px;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-hero-secondary:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.1);
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.hero-stat {
  text-align: center;
}
.hero-stat .num {
  font-size: 28px;
  font-weight: 900;
  color: var(--accent2);
  display: block;
}
.hero-stat .label {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
}

/* ============ 通用容器 ============ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}
.section {
  padding: 60px 0;
}
.section-alt { background: var(--white); }
.section-dark {
  background: var(--primary);
  color: var(--white);
}

/* 区块标题 */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-tag {
  display: inline-block;
  background: rgba(232,65,24,0.1);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 10px;
  border: 1px solid rgba(232,65,24,0.2);
}
.section-title {
  font-size: clamp(22px, 3.5vw, 34px);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-dark .section-title { color: var(--white); }
.section-subtitle {
  font-size: 15px;
  color: var(--text-light);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}
.section-dark .section-subtitle { color: rgba(255,255,255,0.7); }

/* ============ 视频卡片 ============ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  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: #1a1a2e;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img {
  transform: scale(1.05);
}
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(232,65,24,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  border-left: 20px solid white;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: white;
  font-size: 12px;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--accent);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-info {
  padding: 14px 16px;
}
.video-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  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: 12px;
  font-size: 13px;
  color: var(--text-light);
}
.video-meta .author {
  display: flex;
  align-items: center;
  gap: 5px;
}
.author-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: white;
  font-weight: 700;
  flex-shrink: 0;
}
.video-stats {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-light);
}
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* ============ 分类导航 ============ */
.category-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 0 0 12px;
  scrollbar-width: none;
  margin-bottom: 24px;
}
.category-tabs::-webkit-scrollbar { display: none; }
.cat-tab {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  background: var(--white);
  border: 2px solid var(--border);
  color: var(--text);
  transition: var(--transition);
  cursor: pointer;
}
.cat-tab:hover,
.cat-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}

/* ============ 图片展示 ============ */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.photo-card {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3/4;
  position: relative;
  cursor: pointer;
}
.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.photo-card:hover img { transform: scale(1.06); }
.photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  padding: 20px 12px 12px;
  opacity: 0;
  transition: var(--transition);
}
.photo-card:hover .photo-overlay { opacity: 1; }
.photo-overlay p {
  color: white;
  font-size: 13px;
  font-weight: 500;
}

/* ============ 专家卡片 ============ */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto 14px;
  overflow: hidden;
  border: 3px solid var(--accent);
}
.expert-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.expert-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.expert-title {
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}
.expert-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 16px;
}
.expert-tag {
  font-size: 11px;
  padding: 3px 10px;
  background: rgba(232,65,24,0.08);
  color: var(--accent);
  border-radius: 10px;
  border: 1px solid rgba(232,65,24,0.2);
}
.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.btn-sm {
  padding: 6px 14px;
  border-radius: 16px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-primary-sm {
  background: var(--accent);
  color: var(--white);
}
.btn-primary-sm:hover { background: #c0392b; }
.btn-outline-sm {
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline-sm:hover { border-color: var(--accent); color: var(--accent); }

/* ============ 功能模块卡片 ============ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
  cursor: pointer;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}
.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #ff6b35);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  font-size: 26px;
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ============ 评价区 ============ */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: white;
  font-weight: 700;
  flex-shrink: 0;
}
.reviewer-info .name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}
.reviewer-info .date {
  font-size: 12px;
  color: var(--text-light);
}
.stars {
  color: #f39c12;
  font-size: 14px;
  margin-bottom: 10px;
}
.review-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}
.review-tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 11px;
  padding: 2px 10px;
  background: rgba(232,65,24,0.08);
  color: var(--accent);
  border-radius: 10px;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-card);
}
.faq-question {
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question.active { color: var(--accent); }
.faq-arrow {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-question.active .faq-arrow {
  background: var(--accent);
  color: white;
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}
.faq-answer.open {
  max-height: 300px;
  padding: 0 20px 18px;
}

/* ============ 合作品牌 ============ */
.partner-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 28px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-light);
  transition: var(--transition);
  cursor: pointer;
}
.partner-item:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ============ 联系区 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  text-align: center;
}
.contact-icon {
  font-size: 36px;
  margin-bottom: 12px;
}
.contact-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.contact-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}
.qr-wrap {
  margin-top: 14px;
  display: flex;
  justify-content: center;
}
.qr-wrap img {
  width: 110px;
  height: 110px;
  border: 3px solid var(--border);
  border-radius: 8px;
  padding: 4px;
}

/* ============ 社交分享 ============ */
.share-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.share-label {
  font-size: 14px;
  color: var(--text-light);
  font-weight: 500;
}
.share-btn {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}
.share-wechat { background: #07c160; color: white; }
.share-weibo { background: #e6162d; color: white; }
.share-douyin { background: #000; color: white; }
.share-bilibili { background: #00a1d6; color: white; }
.share-btn:hover { opacity: 0.85; transform: translateY(-1px); }

/* ============ 页脚 ============ */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.75);
  padding: 50px 0 0;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text {
  color: var(--white);
  font-size: 24px;
  margin-bottom: 12px;
  display: block;
}
.footer-brand .logo-text span { color: var(--accent); }
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,0.6);
  margin-bottom: 20px;
}
.footer-qrs {
  display: flex;
  gap: 16px;
}
.footer-qr {
  text-align: center;
}
.footer-qr img {
  width: 80px;
  height: 80px;
  border-radius: 6px;
  border: 2px solid rgba(255,255,255,0.15);
  padding: 3px;
  background: white;
}
.footer-qr p {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  margin-top: 6px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  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(--accent); }

/* ============ 内页横幅 ============ */
.page-banner {
  background: linear-gradient(135deg, var(--primary) 0%, #16213e 100%);
  padding: 50px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(232,65,24,0.15) 0%, transparent 70%);
}
.page-banner h1 {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 900;
  color: var(--white);
  margin-bottom: 10px;
  position: relative;
}
.page-banner p {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}

/* ============ 加载更多 ============ */
.load-more-wrap {
  text-align: center;
  margin-top: 36px;
}
.btn-load-more {
  padding: 12px 36px;
  border: 2px solid var(--accent);
  color: var(--accent);
  border-radius: 24px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-load-more:hover {
  background: var(--accent);
  color: var(--white);
}

/* ============ 统计数字 ============ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  text-align: center;
  padding: 32px 20px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
}
.stat-num {
  font-size: 40px;
  font-weight: 900;
  color: var(--accent2);
  display: block;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
}

/* ============ 标签 ============ */
.tag-cloud {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.tag {
  font-size: 12px;
  padding: 4px 12px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-light);
  transition: var(--transition);
  cursor: pointer;
}
.tag:hover { background: var(--accent); color: white; border-color: var(--accent); }

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

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    z-index: 999;
    gap: 4px;
  }
  .hamburger { display: flex; }
  .header-right .btn-login { display: none; }
  .hero-content { padding: 40px 20px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 40px 0; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .hero-stat .num { font-size: 22px; }
}

/* ============ 动画 ============ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.5s ease forwards;
}

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

/* ============ 辅助类 ============ */
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.hidden { display: none; }

/* ============ 更新时间 ============ */
.update-time {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  margin-top: 4px;
}