/* ========================================
   探花 - 影视传媒与视频社区
   主样式文件 | tlyznk.cn
   ======================================== */

/* ---- CSS变量定义 ---- */
:root {
  --primary: #c0392b;
  --primary-dark: #96281b;
  --primary-light: #e74c3c;
  --accent: #f39c12;
  --accent-light: #f1c40f;
  --dark: #1a1a2e;
  --dark-2: #16213e;
  --dark-3: #0f3460;
  --text-main: #2c2c2c;
  --text-sub: #666;
  --text-light: #999;
  --bg-light: #f8f9fa;
  --bg-card: #fff;
  --border: #e8e8e8;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 40px rgba(192,57,43,0.18);
  --radius: 10px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
}

/* ---- 重置与基础 ---- */
*, *::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-main);
  background: #fff;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- 容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

/* ---- 顶部公告条 ---- */
.top-bar {
  background: linear-gradient(90deg, var(--dark) 0%, var(--dark-3) 100%);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 7px 0;
  text-align: center;
  letter-spacing: 0.5px;
}
.top-bar a { color: var(--accent-light); }
.top-bar a:hover { text-decoration: underline; }

/* ---- 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;
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -1px;
  box-shadow: 0 3px 10px rgba(192,57,43,0.3);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 2px;
}
.logo-slogan { font-size: 11px; color: var(--text-light); letter-spacing: 1px; }

/* ---- 主导航 ---- */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
  background: rgba(192,57,43,0.06);
}
.main-nav a:hover::after, .main-nav a.active::after { transform: translateX(-50%) scaleX(1); }

/* ---- 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-main); border-radius: 2px; transition: var(--transition); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- 搜索框 ---- */
.search-bar-wrap {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-3) 100%);
  padding: 14px 0;
}
.search-bar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  max-width: 640px;
  margin: 0 auto;
}
.search-input {
  flex: 1;
  height: 44px;
  border: none;
  border-radius: 22px 0 0 22px;
  padding: 0 20px;
  font-size: 14px;
  font-family: var(--font-main);
  outline: none;
  background: rgba(255,255,255,0.95);
  color: var(--text-main);
}
.search-input::placeholder { color: #aaa; }
.search-btn {
  height: 44px;
  padding: 0 24px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border-radius: 0 22px 22px 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  transition: var(--transition);
  white-space: nowrap;
}
.search-btn:hover { background: linear-gradient(90deg, var(--primary-dark) 0%, var(--primary) 100%); }

/* ---- 面包屑 ---- */
.breadcrumb {
  background: var(--bg-light);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-list { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-light); flex-wrap: wrap; }
.breadcrumb-list a { color: var(--text-sub); }
.breadcrumb-list a:hover { color: var(--primary); }
.breadcrumb-list .sep { color: #ccc; }
.breadcrumb-list .current { color: var(--primary); }

/* ---- 英雄区 ---- */
.hero-section {
  position: relative;
  min-height: 520px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 40%, var(--dark-3) 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_video_bg.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.22;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(15,52,96,0.7) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 60px 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(192,57,43,0.2);
  border: 1px solid rgba(192,57,43,0.4);
  color: #ff7675;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.hero-badge::before { content: '●'; font-size: 8px; animation: blink 1.5s infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.hero-title span { color: var(--accent); }
.hero-subtitle {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
  box-shadow: 0 4px 20px rgba(192,57,43,0.4);
  transition: var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(192,57,43,0.5); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border: 2px solid rgba(255,255,255,0.4);
  color: #fff;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

/* ---- 统计数字 ---- */
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num { font-size: 28px; font-weight: 900; color: var(--accent); line-height: 1; }
.stat-label { font-size: 12px; color: rgba(255,255,255,0.6); margin-top: 4px; letter-spacing: 1px; }

/* ---- 通用区块标题 ---- */
.section-header { text-align: center; margin-bottom: 44px; }
.section-tag {
  display: inline-block;
  background: rgba(192,57,43,0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  letter-spacing: 2px;
  margin-bottom: 12px;
  border: 1px solid rgba(192,57,43,0.2);
}
.section-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  color: var(--dark);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-title span { color: var(--primary); }
.section-desc { font-size: 15px; color: var(--text-sub); max-width: 560px; margin: 0 auto; line-height: 1.8; }

/* ---- 通用区块间距 ---- */
.section { padding: 70px 0; }
.section-gray { background: var(--bg-light); }
.section-dark { background: var(--dark); color: #fff; }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.video-card {
  background: var(--bg-card);
  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;
  width: 100%;
  padding-top: 56.25%;
  overflow: hidden;
  background: var(--dark);
}
.video-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.4); }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.play-icon::after {
  content: '';
  border-left: 18px solid var(--primary);
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  margin-left: 4px;
}
.video-card:hover .play-icon { opacity: 1; transform: scale(1); }
.video-duration {
  position: absolute;
  bottom: 8px; right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 12px;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 10px; left: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 14px 16px 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-light);
}
.video-meta span { display: flex; align-items: center; gap: 3px; }

/* ---- 图片卡片 ---- */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.photo-card {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  aspect-ratio: 3/4;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.photo-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.photo-card:hover img { transform: scale(1.08); }
.photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.photo-card:hover .photo-overlay { opacity: 1; }
.photo-name { color: #fff; font-size: 14px; font-weight: 600; }

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
  border: 1px solid var(--border);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(192,57,43,0.2); }
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  font-weight: 800;
  overflow: hidden;
}
.expert-name { font-size: 18px; font-weight: 800; color: var(--dark); margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-bio { font-size: 13px; color: var(--text-sub); line-height: 1.7; margin-bottom: 16px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 16px; }
.expert-tag {
  font-size: 11px;
  background: rgba(192,57,43,0.08);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid rgba(192,57,43,0.15);
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-sm-primary { background: var(--primary); color: #fff; }
.btn-sm-primary:hover { background: var(--primary-dark); }
.btn-sm-outline { border: 1px solid var(--primary); color: var(--primary); }
.btn-sm-outline:hover { background: var(--primary); color: #fff; }

/* ---- 合作品牌 ---- */
.partner-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-sub);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-item:hover { border-color: var(--primary); color: var(--primary); transform: scale(1.04); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(192,57,43,0.3); box-shadow: 0 4px 16px rgba(192,57,43,0.08); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  gap: 12px;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(192,57,43,0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding: 0 22px 18px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.8;
}
.faq-item.open .faq-answer { display: block; }

/* ---- 用户评价 ---- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius-lg);
  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-stars { color: var(--accent); font-size: 16px; margin-bottom: 12px; letter-spacing: 2px; }
.review-text { font-size: 14px; color: var(--text-sub); line-height: 1.8; margin-bottom: 16px; font-style: italic; }
.review-user { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  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(--text-main); }
.review-date { font-size: 12px; color: var(--text-light); }

/* ---- 联系区块 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
}
.contact-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  text-align: center;
  transition: var(--transition);
}
.contact-card:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.25); }
.contact-icon { font-size: 36px; margin-bottom: 12px; }
.contact-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.contact-info { font-size: 14px; color: rgba(255,255,255,0.7); line-height: 1.7; }
.contact-qr img { width: 100px; height: 100px; border-radius: 8px; margin: 12px auto 0; border: 2px solid rgba(255,255,255,0.2); }

/* ---- 社交分享 ---- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-label { font-size: 14px; color: var(--text-sub); font-weight: 600; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid var(--border);
  color: var(--text-sub);
}
.share-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
.share-wechat:hover { background: #07c160; border-color: #07c160; color: #fff; }
.share-weibo:hover { background: #e6162d; border-color: #e6162d; color: #fff; }
.share-douyin:hover { background: #000; border-color: #000; color: #fff; }
.share-bilibili:hover { background: #00a1d6; border-color: #00a1d6; color: #fff; }

/* ---- 底部 ---- */
.site-footer {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
  color: rgba(255,255,255,0.8);
  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(255,255,255,0.08);
}
.footer-brand .logo-name { color: #fff; font-size: 24px; margin-bottom: 12px; }
.footer-desc { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.8; margin-bottom: 20px; }
.footer-col-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; padding-bottom: 8px; border-bottom: 2px solid var(--primary); display: inline-block; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: var(--accent); }
.update-time { font-size: 12px; color: rgba(255,255,255,0.35); }

/* ---- 内页Banner ---- */
.page-banner {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-3) 100%);
  padding: 50px 0 40px;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/hero_video_bg.jpg') center/cover no-repeat;
  opacity: 0.12;
}
.page-banner-content { position: relative; z-index: 2; }
.page-banner h1 { font-size: clamp(26px, 4vw, 40px); font-weight: 900; color: #fff; margin-bottom: 10px; }
.page-banner p { font-size: 15px; color: rgba(255,255,255,0.7); max-width: 600px; }

/* ---- 内页内容区 ---- */
.page-intro {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow);
  margin-bottom: 32px;
  border-left: 4px solid var(--primary);
}
.page-intro p { font-size: 15px; color: var(--text-sub); line-height: 1.9; }

/* ---- 标签筛选 ---- */
.filter-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.filter-tab {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--text-sub);
  cursor: pointer;
  transition: var(--transition);
}
.filter-tab:hover, .filter-tab.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---- 加载更多 ---- */
.load-more-wrap { text-align: center; margin-top: 40px; }
.btn-load-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 36px;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
}
.btn-load-more:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ---- 工具卡片 ---- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
}
.tool-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  box-shadow: var(--shadow);
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.tool-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: rgba(192,57,43,0.2); }
.tool-icon { font-size: 44px; margin-bottom: 14px; }
.tool-name { font-size: 17px; font-weight: 800; color: var(--dark); margin-bottom: 8px; }
.tool-desc { font-size: 13px; color: var(--text-sub); line-height: 1.7; }
.tool-badge {
  display: inline-block;
  margin-top: 12px;
  font-size: 11px;
  background: rgba(192,57,43,0.1);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 10px;
  font-weight: 600;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: #fff;
    padding: 16px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    z-index: 999;
    gap: 4px;
  }
  .hamburger { display: flex; }
  .hero-section { min-height: 380px; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .expert-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
}
@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .search-bar-inner { max-width: 100%; padding: 0 14px; }
}

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

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

/* ---- 回到顶部 ---- */
.back-to-top {
  position: fixed;
  bottom: 30px; right: 30px;
  width: 44px; height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 16px rgba(192,57,43,0.4);
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* ---- 直播标签 ---- */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #e74c3c;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 1px;
}
.live-badge::before { content: '●'; font-size: 7px; animation: blink 1s infinite; }

/* ---- 热门标签 ---- */
.hot-badge {
  display: inline-flex;
  align-items: center;
  background: linear-gradient(90deg, #ff6b35, #f7c59f);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}

/* ---- 分类导航 ---- */
.cat-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.cat-nav a {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-sub);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.cat-nav a:hover, .cat-nav a.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---- 特色模块 ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.feature-card {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-3) 100%);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  color: #fff;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: -30px; right: -30px;
  width: 80px; height: 80px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: 0 12px 40px rgba(15,52,96,0.4); }
.feature-icon { font-size: 36px; margin-bottom: 12px; }
.feature-name { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.feature-count { font-size: 12px; color: rgba(255,255,255,0.6); }

/* ---- 加入社区引导 ---- */
.join-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 20px; }
.join-step {
  text-align: center;
  padding: 24px 16px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.join-step:hover { border-color: rgba(192,57,43,0.3); box-shadow: var(--shadow-hover); }
.step-num {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  margin: 0 auto 14px;
}
.step-title { font-size: 15px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.step-desc { font-size: 13px; color: var(--text-sub); line-height: 1.7; }