/* ===================================================
   17c一起草 - 主样式文件
   Brand: 17c一起草 | Domain: c9cjwk.cn
   Version: 1.0 | 2025
   =================================================== */

/* ---------- CSS变量 ---------- */
:root {
  --primary: #e8436a;
  --primary-dark: #c42d54;
  --primary-light: #ff7096;
  --secondary: #ff9a3c;
  --accent: #7c3aed;
  --bg-dark: #0f0f14;
  --bg-card: #1a1a24;
  --bg-card2: #22222e;
  --text-main: #f0f0f5;
  --text-muted: #9090a8;
  --text-light: #c8c8d8;
  --border: #2e2e3e;
  --gradient-main: linear-gradient(135deg, #e8436a 0%, #ff9a3c 100%);
  --gradient-dark: linear-gradient(135deg, #1a1a24 0%, #0f0f14 100%);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-hover: 0 8px 40px rgba(232,67,106,0.25);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ---------- 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: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  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; }
input, textarea, select { font-family: inherit; }

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

/* ---------- 顶部公告栏 ---------- */
.tb-5f9ih3f2 {
  background: var(--gradient-main);
  color: #fff;
  font-size: 13px;
  padding: 7px 0;
  text-align: center;
  position: relative;
  z-index: 100;
}
.tb-5f9ih3f2 a { color: #fff; font-weight: 600; }
.tb-5f9ih3f2 .mw-20cqdl { overflow: hidden; white-space: nowrap; }
.tb-5f9ih3f2 .mi-nalksai { display: inline-block; animation: marquee 30s linear infinite; }
@keyframes marquee { 0%{transform:translateX(100vw)} 100%{transform:translateX(-100%)} }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(15,15,20,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.header-inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}
.site-logo img.logo-full {
  height: 38px;
  width: auto;
}
.site-logo .logo-text {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

/* 主导航 */
.main-nav { flex: 1; }
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav ul li a {
  display: block;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav ul li a:hover,
.main-nav ul li a.active {
  color: #fff;
  background: rgba(232,67,106,0.15);
}
.main-nav ul li a.active { color: var(--primary-light); }

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 0 14px;
  gap: 8px;
  flex-shrink: 0;
  transition: var(--transition);
}
.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,67,106,0.15);
}
.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 14px;
  width: 180px;
  padding: 8px 0;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search button {
  color: var(--text-muted);
  font-size: 16px;
  transition: var(--transition);
}
.header-search button:hover { color: var(--primary); }

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

/* ---------- 搜索栏（导航下方） ---------- */
.search-bar-section {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.search-bar-inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-bar-big {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  border: 1.5px solid var(--border);
  border-radius: 30px;
  padding: 0 20px;
  gap: 10px;
  transition: var(--transition);
}
.search-bar-big:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(232,67,106,0.12);
}
.search-bar-big input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 15px;
  padding: 11px 0;
}
.search-bar-big input::placeholder { color: var(--text-muted); }
.search-btn {
  background: var(--gradient-main);
  color: #fff;
  border: none;
  border-radius: 24px;
  padding: 10px 28px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.search-btn:hover { opacity: 0.88; transform: translateY(-1px); }
.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
}
.search-hot-tags span { color: var(--text-muted); }
.search-hot-tags a {
  color: var(--text-light);
  background: var(--bg-card2);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  transition: var(--transition);
}
.search-hot-tags a:hover { color: var(--primary-light); background: rgba(232,67,106,0.1); }

/* ---------- 通用容器 ---------- */
.container { max-width: 1300px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-sm { padding: 40px 0; }

/* ---------- 区块标题 ---------- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}
.section-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 24px;
  background: var(--gradient-main);
  border-radius: 2px;
}
.section-more {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}
.section-more:hover { color: var(--primary-light); }

/* ---------- Hero Banner ---------- */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
  transition: transform 0.6s ease;
}
.hero:hover .hero-bg { transform: scale(1.03); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15,15,20,0.92) 0%, rgba(15,15,20,0.4) 60%, transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 620px;
  padding: 60px 20px 60px 60px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,67,106,0.2);
  border: 1px solid rgba(232,67,106,0.4);
  color: var(--primary-light);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--primary-light);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.8)} }
.hero h1 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #fff;
}
.hero h1 em {
  font-style: normal;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(232,67,106,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(232,67,106,0.5); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  padding: 12px 28px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 1.5px solid rgba(255,255,255,0.4);
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--primary-light); color: var(--primary-light); background: rgba(232,67,106,0.08); }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 28px;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat .label { font-size: 12px; color: rgba(255,255,255,0.55); margin-top: 2px; }

/* ---------- 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;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(232,67,106,0.3);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-card2);
}
.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); }
.video-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 .video-play-btn { opacity: 1; background: rgba(0,0,0,0.35); }
.video-play-btn .play-icon {
  width: 56px;
  height: 56px;
  background: rgba(232,67,106,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(232,67,106,0.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}
.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 3px; }
.video-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}
.video-author img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}
.video-author span { font-size: 12px; color: var(--text-muted); }
.video-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.video-tag {
  font-size: 11px;
  color: var(--primary-light);
  background: rgba(232,67,106,0.1);
  padding: 2px 8px;
  border-radius: 10px;
}

/* ---------- 分类导航 ---------- */
.cat-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.cat-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.cat-btn:hover, .cat-btn.active {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(232,67,106,0.3);
}

/* ---------- 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 20px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(232,67,106,0.3);
}
.expert-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(232,67,106,0.15);
}
.expert-name { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.expert-role {
  font-size: 12px;
  color: var(--primary-light);
  background: rgba(232,67,106,0.1);
  padding: 3px 10px;
  border-radius: 12px;
  display: inline-block;
  margin-bottom: 12px;
}
.expert-desc { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 16px; }
.expert-award {
  font-size: 11px;
  color: var(--secondary);
  background: rgba(255,154,60,0.1);
  padding: 2px 8px;
  border-radius: 10px;
}
.expert-actions { 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(--gradient-main); color: #fff; }
.btn-sm.outline { border: 1px solid var(--border); color: var(--text-light); }
.btn-sm:hover { opacity: 0.85; transform: translateY(-1px); }

/* ---------- 合作品牌 ---------- */
.partner-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: 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-muted);
  transition: var(--transition);
  min-width: 130px;
  text-align: center;
}
.partner-item:hover { color: var(--primary-light); border-color: var(--primary); background: rgba(232,67,106,0.05); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(232,67,106,0.3); }
.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);
  transition: var(--transition);
  gap: 12px;
}
.faq-question:hover { color: var(--primary-light); }
.faq-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg-card2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  font-size: 14px;
  color: var(--primary);
}
.faq-item.open .faq-icon { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 22px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* ---------- 用户评价 ---------- */
.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: 22px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.review-card:hover { border-color: rgba(232,67,106,0.25); transform: translateY(-2px); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.review-user-info .name { font-size: 14px; font-weight: 700; }
.review-user-info .date { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.review-stars { color: #fbbf24; font-size: 13px; margin-bottom: 10px; }
.review-text { font-size: 13px; color: var(--text-light); line-height: 1.75; }
.review-tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 11px;
  color: var(--primary-light);
  background: rgba(232,67,106,0.1);
  padding: 2px 8px;
  border-radius: 10px;
}

/* ---------- 联系与社区 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.contact-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
}
.contact-card:hover { border-color: rgba(232,67,106,0.3); transform: translateY(-3px); }
.contact-icon {
  font-size: 36px;
  margin-bottom: 12px;
}
.contact-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.contact-card p { font-size: 13px; color: var(--text-muted); }
.contact-card a { color: var(--primary-light); }

/* ---------- 社交分享 ---------- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.s-6orrwc { background: #07c160; color: #fff; }
.s-6orrwb { background: #e6162d; color: #fff; }
.s-6orrdy { background: #010101; color: #fff; border: 1px solid #333; }
.s-6orrbl { background: #00a1d6; color: #fff; }

/* ---------- 底部 ---------- */
.site-footer {
  background: #080810;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 22px;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand p { font-size: 13px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.footer-qr-row { display: flex; gap: 20px; }
.footer-qr-item { text-align: center; }
.footer-qr-item img { width: 88px; height: 88px; border-radius: 8px; border: 2px solid var(--border); }
.footer-qr-item span { display: block; font-size: 11px; color: var(--text-muted); margin-top: 6px; }
.footer-col h5 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 12px; color: var(--text-muted); }
.footer-bottom a { color: var(--primary-light); }
.footer-links { display: flex; gap: 16px; }
.footer-links a { font-size: 12px; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 16px 0;
}
.breadcrumb a { color: var(--text-muted); transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-light); }

/* ---------- 页面Banner ---------- */
.page-banner {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232,67,106,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.page-banner h1 { font-size: 32px; font-weight: 900; margin-bottom: 8px; }
.page-banner p { font-size: 15px; color: var(--text-muted); }

/* ---------- 标签 ---------- */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: 0.5px;
}
.badge-hot { background: rgba(239,68,68,0.15); color: #ef4444; }
.badge-new { background: rgba(34,197,94,0.15); color: #22c55e; }
.badge-live { background: rgba(232,67,106,0.15); color: var(--primary-light); }
.badge-vip { background: rgba(255,154,60,0.15); color: var(--secondary); }

/* ---------- 统计数字 ---------- */
.stats-row {
  display: flex;
  gap: 0;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}
.stat-item {
  flex: 1;
  padding: 28px 20px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: 32px;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ---------- 直播卡片 ---------- */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(239,68,68,0.15);
  color: #ef4444;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 10px;
}
.live-badge .dot {
  width: 5px; height: 5px;
  background: #ef4444;
  border-radius: 50%;
  animation: pulse 1s infinite;
}

/* ---------- 弹幕效果 ---------- */
.dw-kme3dna4 {
  position: relative;
  overflow: hidden;
  height: 36px;
  background: rgba(0,0,0,0.3);
  border-radius: 18px;
  margin-top: 12px;
}
.di-fdkc3k8o {
  position: absolute;
  white-space: nowrap;
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  top: 50%;
  transform: translateY(-50%);
  animation: danmaku linear infinite;
}
@keyframes danmaku { from{left:100%} to{left:-100%} }

/* ---------- AI功能卡片 ---------- */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.ai-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px 20px;
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: var(--transition);
}
.ai-card:hover::before { transform: scaleX(1); }
.ai-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.ai-icon { font-size: 40px; margin-bottom: 12px; }
.ai-card h4 { font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.ai-card p { font-size: 12px; color: var(--text-muted); line-height: 1.7; }

/* ---------- 加入社区步骤 ---------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
}
.step-num {
  width: 44px;
  height: 44px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #fff;
  margin: 0 auto 14px;
}
.step-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 13px; color: var(--text-muted); line-height: 1.7; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-content { padding: 40px 20px 40px 30px; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open { display: block; position: absolute; top: 64px; left: 0; right: 0; background: rgba(15,15,20,0.98); border-bottom: 1px solid var(--border); padding: 12px; }
  .main-nav.open ul { flex-direction: column; gap: 2px; }
  .main-nav.open ul li a { padding: 10px 16px; }
  .nav-toggle { display: flex; }
  .header-search { display: none; }
  .hero { min-height: 380px; }
  .hero-content { padding: 30px 20px; }
  .hero h1 { font-size: 24px; }
  .hero-stats { gap: 20px; }
  .hero-stat .num { font-size: 22px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-row { flex-wrap: wrap; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--border); }
  .stat-item:last-child { border-bottom: none; }
  .search-bar-section { display: none; }
  .section { padding: 40px 0; }
  .section-title { font-size: 20px; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .footer-qr-row { justify-content: center; }
}

/* ---------- 工具类 ---------- */
.text-gradient {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.hidden { display: none; }
.show { display: block; }

/* ---------- 懒加载占位 ---------- */
.lazy-placeholder {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card2) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: skeleton 1.5s infinite;
}
@keyframes skeleton { 0%{background-position:200% 0} 100%{background-position:-200% 0} }