/* ============================================
   糖心vlog - 原创CSS样式
   配色：深紫(#1a0a2e) + 粉红(#FF6B9D) + 珊瑚(#FF9A76) + 薰衣草(#C084FC)
   ============================================ */
:root {
  --bg-primary: #1a0a2e;
  --bg-secondary: #2d1b4e;
  --bg-card: #251342;
  --accent-pink: #FF6B9D;
  --accent-coral: #FF9A76;
  --accent-lavender: #C084FC;
  --accent-gold: #FFD700;
  --text-primary: #f0e6ff;
  --text-secondary: #b8a0d6;
  --text-muted: #8b72a8;
  --gradient-main: linear-gradient(135deg, #FF6B9D 0%, #C084FC 50%, #FF9A76 100%);
  --gradient-dark: linear-gradient(180deg, #1a0a2e 0%, #2d1b4e 100%);
  --shadow-glow: 0 0 20px rgba(255,107,157,0.3);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--accent-pink); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-coral); }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* === 顶部导航 === */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(26,10,46,0.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(192,132,252,0.15);
  padding: 0 20px; height: 68px;
}
.header-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; height: 68px;
}
.logo-wrap { display: flex; align-items: center; gap: 10px; }
.logo-wrap img { height: 40px; width: auto; }
.logo-wrap .brand-text { font-size: 1.3rem; font-weight: 700; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.main-nav { display: flex; gap: 6px; }
.main-nav a {
  padding: 8px 16px; border-radius: 8px; font-size: 0.9rem; color: var(--text-secondary);
  transition: var(--transition); position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--accent-pink); background: rgba(255,107,157,0.1);
}
.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }

/* === 搜索框 === */
.search-bar {
  background: var(--bg-secondary); padding: 16px 0;
  border-bottom: 1px solid rgba(192,132,252,0.1); margin-top: 68px;
}
.search-inner { max-width: 680px; margin: 0 auto; display: flex; gap: 10px; padding: 0 20px; }
.search-inner input {
  flex: 1; padding: 12px 20px; border-radius: 30px; border: 2px solid rgba(192,132,252,0.2);
  background: rgba(26,10,46,0.8); color: var(--text-primary); font-size: 0.95rem;
  transition: var(--transition); outline: none;
}
.search-inner input:focus { border-color: var(--accent-pink); box-shadow: 0 0 12px rgba(255,107,157,0.2); }
.search-inner input::placeholder { color: var(--text-muted); }
.search-inner button {
  padding: 12px 28px; border-radius: 30px; border: none; cursor: pointer;
  background: var(--gradient-main); color: #fff; font-size: 0.95rem; font-weight: 600;
  transition: var(--transition);
}
.search-inner button:hover { transform: scale(1.05); box-shadow: var(--shadow-glow); }

/* === Hero横幅 === */
.hero-section {
  position: relative; min-height: 520px; display: flex; align-items: center;
  overflow: hidden; padding: 60px 0;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(26,10,46,0.88) 0%, rgba(45,27,78,0.7) 50%, rgba(26,10,46,0.85) 100%);
}
.hero-content { position: relative; z-index: 1; max-width: 680px; padding: 0 20px; }
.hero-content h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.hero-content h1 .highlight { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-content p { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 28px; line-height: 1.8; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.hero-tags span {
  padding: 6px 16px; border-radius: 20px; font-size: 0.85rem;
  background: rgba(255,107,157,0.15); color: var(--accent-pink); border: 1px solid rgba(255,107,157,0.3);
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  padding: 14px 32px; border-radius: 30px; border: none; cursor: pointer;
  background: var(--gradient-main); color: #fff; font-size: 1rem; font-weight: 600;
  transition: var(--transition); display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); color: #fff; }
.btn-outline {
  padding: 14px 32px; border-radius: 30px; cursor: pointer;
  background: transparent; color: var(--accent-lavender); font-size: 1rem; font-weight: 600;
  border: 2px solid var(--accent-lavender); transition: var(--transition);
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-outline:hover { background: rgba(192,132,252,0.1); transform: translateY(-2px); color: var(--accent-lavender); }

/* === 通用区块标题 === */
.section { padding: 70px 0; }
.section-alt { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.section-header h2 .pink { color: var(--accent-pink); }
.section-header h2 .lavender { color: var(--accent-lavender); }
.section-header p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.section-tag {
  display: inline-block; padding: 4px 14px; border-radius: 16px; font-size: 0.8rem;
  background: rgba(255,107,157,0.12); color: var(--accent-pink); margin-bottom: 12px;
  border: 1px solid rgba(255,107,157,0.2);
}

/* === 视频卡片网格 === */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.video-card {
  background: var(--bg-card); border-radius: var(--radius); overflow: hidden;
  transition: var(--transition); border: 1px solid rgba(192,132,252,0.1);
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-glow); border-color: rgba(255,107,157,0.3); }
.video-thumb {
  position: relative; aspect-ratio: 16/9; overflow: hidden; cursor: pointer;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.video-card:hover .video-thumb img { transform: scale(1.08); }
.play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0);
  width: 60px; height: 60px; border-radius: 50%;
  background: rgba(255,107,157,0.9); display: flex; align-items: center; justify-content: center;
  transition: var(--transition); backdrop-filter: blur(4px);
}
.play-btn::after {
  content: ''; width: 0; height: 0;
  border-left: 18px solid #fff; border-top: 11px solid transparent; border-bottom: 11px solid transparent;
  margin-left: 4px;
}
.video-card:hover .play-btn { transform: translate(-50%, -50%) scale(1); }
.video-duration {
  position: absolute; bottom: 8px; right: 8px; padding: 3px 8px;
  background: rgba(0,0,0,0.75); color: #fff; font-size: 0.78rem; border-radius: 4px;
}
.video-live {
  position: absolute; top: 10px; left: 10px; padding: 3px 10px;
  background: #ff4444; color: #fff; font-size: 0.75rem; border-radius: 4px; font-weight: 600;
}
.video-info { padding: 16px; }
.video-info h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-meta { display: flex; gap: 14px; color: var(--text-muted); font-size: 0.82rem; flex-wrap: wrap; }
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* === 分类标签栏 === */
.tab-nav { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px; }
.tab-nav button {
  padding: 8px 22px; border-radius: 22px; border: 1px solid rgba(192,132,252,0.2);
  background: transparent; color: var(--text-secondary); font-size: 0.9rem; cursor: pointer;
  transition: var(--transition);
}
.tab-nav button:hover, .tab-nav button.active {
  background: var(--gradient-main); color: #fff; border-color: transparent;
}

/* === 专家卡片 === */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.expert-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 28px; text-align: center;
  border: 1px solid rgba(192,132,252,0.1); transition: var(--transition);
}
.expert-card:hover { border-color: rgba(255,107,157,0.3); box-shadow: var(--shadow-glow); }
.expert-avatar {
  width: 90px; height: 90px; border-radius: 50%; margin: 0 auto 16px;
  overflow: hidden; border: 3px solid var(--accent-pink);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-card h3 { font-size: 1.1rem; margin-bottom: 4px; }
.expert-card .role { color: var(--accent-lavender); font-size: 0.88rem; margin-bottom: 10px; }
.expert-card .bio { color: var(--text-secondary); font-size: 0.88rem; margin-bottom: 16px; line-height: 1.6; }
.expert-card .awards { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 14px; }
.expert-card .awards span {
  padding: 3px 10px; border-radius: 12px; font-size: 0.75rem;
  background: rgba(255,215,0,0.12); color: var(--accent-gold); border: 1px solid rgba(255,215,0,0.2);
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.expert-btns a {
  padding: 7px 18px; border-radius: 18px; font-size: 0.82rem; font-weight: 600;
}
.expert-btns .btn-sm-pink { background: rgba(255,107,157,0.15); color: var(--accent-pink); border: 1px solid rgba(255,107,157,0.3); }
.expert-btns .btn-sm-lav { background: rgba(192,132,252,0.15); color: var(--accent-lavender); border: 1px solid rgba(192,132,252,0.3); }

/* === FAQ手风琴 === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card); border-radius: var(--radius); margin-bottom: 12px;
  border: 1px solid rgba(192,132,252,0.1); overflow: hidden;
}
.faq-q {
  padding: 18px 24px; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  font-weight: 600; font-size: 1rem; transition: var(--transition);
}
.faq-q:hover { color: var(--accent-pink); }
.faq-q .arrow { transition: var(--transition); font-size: 1.2rem; color: var(--accent-lavender); }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; }
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 18px; }
.faq-a p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }

/* === 用户评论 === */
.review-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.review-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 24px;
  border: 1px solid rgba(192,132,252,0.1); transition: var(--transition);
}
.review-card:hover { border-color: rgba(255,107,157,0.3); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--gradient-main); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 1.1rem; }
.review-name { font-weight: 600; font-size: 0.95rem; }
.review-date { color: var(--text-muted); font-size: 0.8rem; }
.review-stars { color: var(--accent-gold); font-size: 0.9rem; margin-bottom: 10px; }
.review-text { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* === 合作品牌墙 === */
.brand-wall { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; align-items: center; }
.brand-wall .brand-item {
  padding: 16px 28px; background: var(--bg-card); border-radius: var(--radius);
  border: 1px solid rgba(192,132,252,0.1); color: var(--text-secondary);
  font-size: 1rem; font-weight: 600; transition: var(--transition);
}
.brand-wall .brand-item:hover { border-color: var(--accent-pink); color: var(--accent-pink); }

/* === How-To指南 === */
.howto-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 24px; }
.howto-step {
  background: var(--bg-card); border-radius: var(--radius); padding: 28px; text-align: center;
  border: 1px solid rgba(192,132,252,0.1); position: relative;
}
.step-num {
  width: 48px; height: 48px; border-radius: 50%; background: var(--gradient-main);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 16px;
  font-size: 1.3rem; font-weight: 800; color: #fff;
}
.howto-step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.howto-step p { color: var(--text-secondary); font-size: 0.88rem; }

/* === 联系信息 === */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.contact-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 28px;
  border: 1px solid rgba(192,132,252,0.1); text-align: center;
}
.contact-card h3 { font-size: 1.05rem; margin-bottom: 12px; color: var(--accent-pink); }
.contact-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 6px; }
.contact-card img { max-width: 160px; margin: 12px auto 0; border-radius: 8px; }

/* === 社交分享 === */
.share-bar { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; padding: 20px 0; }
.share-bar a {
  width: 44px; height: 44px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--bg-card); border: 1px solid rgba(192,132,252,0.2); color: var(--text-secondary);
  font-size: 1.1rem; transition: var(--transition);
}
.share-bar a:hover { background: var(--accent-pink); color: #fff; border-color: var(--accent-pink); }

/* === 面包屑导航 === */
.breadcrumb { padding: 16px 0; }
.breadcrumb ol { list-style: none; display: flex; gap: 8px; flex-wrap: wrap; font-size: 0.88rem; }
.breadcrumb li + li::before { content: '/'; color: var(--text-muted); margin-right: 8px; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent-pink); }
.breadcrumb .current { color: var(--accent-pink); }

/* === 页脚 === */
.site-footer {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, #0f0520 100%);
  padding: 50px 0 0; border-top: 1px solid rgba(192,132,252,0.1);
}
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 36px; margin-bottom: 36px; }
.footer-col h4 { font-size: 1rem; margin-bottom: 16px; color: var(--accent-pink); }
.footer-col p, .footer-col a { color: var(--text-muted); font-size: 0.88rem; display: block; margin-bottom: 8px; }
.footer-col a:hover { color: var(--accent-pink); }
.footer-col .footer-logo { height: 36px; margin-bottom: 12px; }
.footer-qr { display: flex; gap: 16px; }
.footer-qr img { width: 100px; border-radius: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(192,132,252,0.08); padding: 20px 0;
  text-align: center; color: var(--text-muted); font-size: 0.82rem;
}

/* === MCP前端代码块 === */
.mcp-block {
  background: var(--bg-card); border-radius: var(--radius); padding: 20px;
  border: 1px solid rgba(192,132,252,0.1); margin-top: 20px;
}
.mcp-block pre {
  background: rgba(0,0,0,0.3); padding: 16px; border-radius: 8px;
  overflow-x: auto; font-size: 0.82rem; color: var(--accent-lavender); line-height: 1.6;
}

/* === 功能模块网格 === */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.feature-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 28px;
  border: 1px solid rgba(192,132,252,0.1); transition: var(--transition);
}
.feature-card:hover { border-color: rgba(255,107,157,0.3); transform: translateY(-4px); }
.feature-icon { font-size: 2.2rem; margin-bottom: 14px; }
.feature-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.6; }

/* === 数据统计条 === */
.stats-bar { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; padding: 40px 0; }
.stat-item { text-align: center; }
.stat-num { font-size: 2.4rem; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { color: var(--text-muted); font-size: 0.88rem; margin-top: 4px; }

/* === 响应式 === */
@media (max-width: 768px) {
  .main-nav { display: none; position: fixed; top: 68px; left: 0; width: 100%; background: rgba(26,10,46,0.98); flex-direction: column; padding: 20px; gap: 4px; border-bottom: 1px solid rgba(192,132,252,0.15); }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-section { min-height: 400px; }
  .video-grid { grid-template-columns: 1fr; }
  .stats-bar { gap: 24px; }
  .stat-num { font-size: 1.8rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .search-inner { flex-direction: column; }
  .search-inner button { width: 100%; }
}
@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.5rem; }
  .section { padding: 40px 0; }
  .section-header h2 { font-size: 1.5rem; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
}