/* ============================================
   香蕉视频 - 原创全站样式表
   品牌色系: 珊瑚粉 #FF6B9D / 暖橙 #FF8A65 / 深紫 #2D1B4E / 星空蓝 #1A1A2E
   ============================================ */

/* --- CSS Variables --- */
:root {
  --brand-pink: #FF6B9D;
  --brand-coral: #FF8A65;
  --brand-purple: #2D1B4E;
  --brand-dark: #1A1A2E;
  --brand-light: #F8F0FF;
  --brand-gold: #FFD700;
  --text-primary: #E8E0F0;
  --text-secondary: #A89BBF;
  --text-muted: #7B6E8F;
  --card-bg: rgba(45, 27, 78, 0.6);
  --card-border: rgba(255, 107, 157, 0.15);
  --gradient-main: linear-gradient(135deg, var(--brand-pink), var(--brand-coral));
  --gradient-dark: linear-gradient(180deg, #0F0A1A 0%, var(--brand-dark) 50%, var(--brand-purple) 100%);
  --shadow-glow: 0 4px 30px rgba(255, 107, 157, 0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --max-width: 1240px;
  --header-h: 68px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--gradient-dark);
  color: var(--text-primary);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--brand-pink); text-decoration: none; transition: color .25s; }
a:hover { color: var(--brand-coral); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.35; font-weight: 700; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* --- Header --- */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(15, 10, 26, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--card-border);
  height: var(--header-h);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-width); margin: 0 auto; padding: 0 20px;
  height: 100%;
}
.site-logo { display: flex; align-items: center; gap: 10px; }
.site-logo img { width: 40px; height: 40px; border-radius: 10px; }
.site-logo-text {
  font-size: 1.3rem; font-weight: 800;
  background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav ul { display: flex; gap: 6px; align-items: center; }
.main-nav a {
  display: block; padding: 8px 16px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.92rem; font-weight: 500;
  transition: all .25s;
}
.main-nav a:hover, .main-nav a.active {
  color: #fff; background: rgba(255, 107, 157, 0.15);
}
.menu-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 36px; height: 36px; flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.menu-toggle span {
  display: block; width: 24px; height: 2px; background: var(--text-primary);
  border-radius: 2px; transition: .3s;
}

/* --- Search Bar --- */
.search-bar {
  background: rgba(45, 27, 78, 0.5);
  border-bottom: 1px solid var(--card-border);
  padding: 12px 0;
}
.search-bar .container { display: flex; justify-content: center; }
.search-wrap {
  display: flex; max-width: 600px; width: 100%;
  background: rgba(255,255,255,0.06); border-radius: 50px;
  border: 1px solid var(--card-border); overflow: hidden;
}
.search-wrap input {
  flex: 1; background: none; border: none; padding: 10px 20px;
  color: var(--text-primary); font-size: 0.95rem; outline: none;
}
.search-wrap input::placeholder { color: var(--text-muted); }
.search-wrap button {
  background: var(--gradient-main); border: none; padding: 10px 24px;
  color: #fff; font-size: 0.92rem; cursor: pointer; font-weight: 600;
  transition: opacity .25s;
}
.search-wrap button:hover { opacity: .85; }

/* --- Hero Section --- */
.hero-section {
  position: relative; overflow: hidden;
  padding: 80px 0 60px; min-height: 480px;
  display: flex; align-items: center;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
}
.hero-bg img {
  width: 100%; height: 100%; object-fit: cover;
  filter: brightness(0.45);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,10,26,0.3) 0%, rgba(26,26,46,0.85) 100%);
  z-index: 1;
}
.hero-content {
  position: relative; z-index: 2;
  max-width: var(--max-width); margin: 0 auto; padding: 0 20px;
}
.hero-content h1 {
  font-size: 2.6rem; margin-bottom: 16px;
  background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content p { font-size: 1.15rem; color: var(--text-secondary); max-width: 650px; margin-bottom: 28px; }
.hero-tags { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-tag {
  padding: 6px 16px; border-radius: 50px; font-size: 0.82rem; font-weight: 500;
  background: rgba(255,107,157,0.12); color: var(--brand-pink);
  border: 1px solid rgba(255,107,157,0.2);
}

/* --- Section Common --- */
.section-block { padding: 60px 0; }
.section-block:nth-child(even) { background: rgba(45, 27, 78, 0.15); }
.section-title {
  font-size: 1.8rem; text-align: center; margin-bottom: 8px;
  position: relative;
}
.section-title::after {
  content: ''; display: block; width: 60px; height: 3px;
  background: var(--gradient-main); margin: 12px auto 0; border-radius: 3px;
}
.section-subtitle {
  text-align: center; color: var(--text-muted); font-size: 0.95rem; margin-bottom: 40px;
}

/* --- Video Card Grid --- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}
.video-thumb {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9;
}
.video-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(255,107,157,0.85); display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity .3s;
  box-shadow: 0 0 30px rgba(255,107,157,0.4);
}
.play-btn::after {
  content: ''; display: block; width: 0; height: 0;
  border-style: solid; border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.video-card:hover .play-btn { opacity: 1; }
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75); color: #fff; padding: 2px 8px;
  border-radius: 4px; font-size: 0.78rem;
}
.video-info { padding: 14px 16px; }
.video-info h3 {
  font-size: 1rem; font-weight: 600; margin-bottom: 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  color: var(--text-primary);
}
.video-meta {
  display: flex; gap: 14px; font-size: 0.8rem; color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tag {
  display: inline-block; padding: 2px 10px; border-radius: 50px;
  font-size: 0.72rem; background: rgba(255,107,157,0.1); color: var(--brand-pink);
  margin-top: 8px;
}

/* --- Expert Cards --- */
.expert-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px;
}
.expert-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-md); padding: 28px 20px; text-align: center;
  transition: transform .3s;
}
.expert-card:hover { transform: translateY(-4px); }
.expert-avatar {
  width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 16px;
  background: var(--gradient-main); display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: #fff;
}
.expert-card h4 { font-size: 1.1rem; margin-bottom: 4px; }
.expert-card .role { color: var(--brand-pink); font-size: 0.85rem; margin-bottom: 10px; }
.expert-card p { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 16px; }
.expert-btns { display: flex; gap: 10px; justify-content: center; }
.btn-sm {
  padding: 6px 16px; border-radius: 50px; font-size: 0.82rem; font-weight: 500;
  border: 1px solid var(--brand-pink); color: var(--brand-pink);
  transition: all .25s; cursor: pointer; background: none;
}
.btn-sm:hover { background: var(--brand-pink); color: #fff; }
.btn-sm.filled { background: var(--gradient-main); color: #fff; border: none; }

/* --- Review Cards --- */
.review-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px;
}
.review-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-md); padding: 24px;
}
.review-stars { color: var(--brand-gold); font-size: 1rem; margin-bottom: 10px; letter-spacing: 2px; }
.review-card p { font-size: 0.92rem; color: var(--text-secondary); margin-bottom: 14px; font-style: italic; }
.review-author { font-size: 0.85rem; color: var(--text-muted); }

/* --- FAQ Accordion --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--card-border); border-radius: var(--radius-sm);
  margin-bottom: 10px; overflow: hidden;
}
.faq-question {
  width: 100%; background: var(--card-bg); border: none; padding: 16px 20px;
  color: var(--text-primary); font-size: 0.95rem; font-weight: 600;
  text-align: left; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
}
.faq-question::after { content: '+'; font-size: 1.3rem; color: var(--brand-pink); transition: transform .3s; }
.faq-item.open .faq-question::after { content: '−'; }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .35s ease;
  padding: 0 20px; color: var(--text-secondary); font-size: 0.9rem;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 20px 16px; }

/* --- Contact Section --- */
.contact-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px;
}
.contact-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-md); padding: 28px; text-align: center;
}
.contact-card h4 { font-size: 1.05rem; margin-bottom: 12px; color: var(--brand-pink); }
.contact-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 8px; }
.contact-card img { max-width: 180px; margin: 12px auto 0; border-radius: var(--radius-sm); }

/* --- Partner Logos --- */
.partner-wall {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 30px;
  padding: 20px 0;
}
.partner-item {
  width: 120px; height: 60px; background: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; color: var(--text-muted); font-weight: 600;
  border: 1px solid var(--card-border);
}

/* --- Social Share --- */
.share-bar {
  display: flex; gap: 12px; justify-content: center; padding: 20px 0;
}
.share-btn {
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 700; color: #fff; cursor: pointer;
  transition: transform .25s;
}
.share-btn:hover { transform: scale(1.1); }
.share-btn.wechat { background: #07C160; }
.share-btn.weibo { background: #E6162D; }
.share-btn.douyin { background: #161823; border: 1px solid #333; }
.share-btn.bilibili { background: #00A1D6; }

/* --- About Content --- */
.about-content { max-width: 900px; margin: 0 auto; }
.about-content p { margin-bottom: 18px; color: var(--text-secondary); font-size: 0.95rem; }
.about-content h3 { font-size: 1.25rem; margin: 28px 0 12px; color: var(--text-primary); }

/* --- Feature Grid --- */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px;
}
.feature-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-md); padding: 28px 20px; text-align: center;
  transition: transform .3s;
}
.feature-card:hover { transform: translateY(-4px); }
.feature-icon { font-size: 2.2rem; margin-bottom: 14px; }
.feature-card h4 { font-size: 1rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.88rem; color: var(--text-secondary); }

/* --- Breadcrumb --- */
.breadcrumb-nav {
  padding: 14px 0; font-size: 0.85rem;
}
.breadcrumb-nav ol { display: flex; gap: 8px; align-items: center; }
.breadcrumb-nav li::after { content: '/'; margin-left: 8px; color: var(--text-muted); }
.breadcrumb-nav li:last-child::after { display: none; }
.breadcrumb-nav a { color: var(--text-muted); }
.breadcrumb-nav .current { color: var(--brand-pink); }

/* --- Page Hero (inner pages) --- */
.page-hero {
  position: relative; min-height: 300px; display: flex; align-items: center;
  overflow: hidden;
}
.page-hero-bg {
  position: absolute; inset: 0;
}
.page-hero-bg img { width: 100%; height: 100%; object-fit: cover; filter: brightness(0.4); }
.page-hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,10,26,0.2), rgba(26,26,46,0.9));
}
.page-hero-content {
  position: relative; z-index: 2;
  max-width: var(--max-width); margin: 0 auto; padding: 60px 20px 40px;
}
.page-hero-content h1 { font-size: 2.2rem; margin-bottom: 10px; }
.page-hero-content p { color: var(--text-secondary); font-size: 1.05rem; }

/* --- Footer --- */
.site-footer {
  background: rgba(10, 6, 18, 0.95);
  border-top: 1px solid var(--card-border);
  padding: 50px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px; max-width: var(--max-width); margin: 0 auto; padding: 0 20px 40px;
}
.footer-col h4 {
  font-size: 1rem; margin-bottom: 16px; color: var(--text-primary);
  position: relative; padding-bottom: 10px;
}
.footer-col h4::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 30px; height: 2px; background: var(--gradient-main); border-radius: 2px;
}
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--text-muted); font-size: 0.88rem; }
.footer-col a:hover { color: var(--brand-pink); }
.footer-col p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }
.footer-qr { display: flex; gap: 16px; margin-top: 12px; }
.footer-qr img { width: 100px; border-radius: var(--radius-sm); }
.footer-qr-label { font-size: 0.75rem; color: var(--text-muted); text-align: center; margin-top: 4px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo img { width: 36px; height: 36px; border-radius: 8px; }
.footer-logo span {
  font-size: 1.15rem; font-weight: 700;
  background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-social { display: flex; gap: 10px; margin-top: 12px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 0.8rem; font-weight: 700;
  transition: all .25s;
}
.footer-social a:hover { background: var(--brand-pink); color: #fff; }
.footer-bottom {
  border-top: 1px solid var(--card-border);
  padding: 18px 20px; text-align: center;
  max-width: var(--max-width); margin: 0 auto;
}
.footer-bottom p { font-size: 0.82rem; color: var(--text-muted); }
.footer-update { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* --- Buttons --- */
.btn-primary {
  display: inline-block; padding: 12px 32px; border-radius: 50px;
  background: var(--gradient-main); color: #fff; font-weight: 600;
  font-size: 0.95rem; transition: all .3s; border: none; cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); color: #fff; }

/* --- Gallery --- */
.gallery-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px;
}
.gallery-grid img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  border-radius: var(--radius-sm); transition: transform .3s;
}
.gallery-grid img:hover { transform: scale(1.03); }

/* --- Stats Bar --- */
.stats-bar {
  display: flex; justify-content: center; gap: 50px; flex-wrap: wrap;
  padding: 30px 0;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 2.2rem; font-weight: 800;
  background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* --- Responsive --- */
@media (max-width: 768px) {
  :root { --header-h: 60px; }
  .menu-toggle { display: flex; }
  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    background: rgba(15,10,26,0.98); backdrop-filter: blur(18px);
    padding: 20px; transform: translateY(-120%); transition: transform .35s;
    border-bottom: 1px solid var(--card-border);
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav ul { flex-direction: column; gap: 4px; }
  .main-nav a { padding: 12px 16px; font-size: 1rem; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-section { min-height: 360px; padding: 60px 0 40px; }
  .section-title { font-size: 1.4rem; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
  .stats-bar { gap: 24px; }
  .stat-num { font-size: 1.6rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .page-hero-content h1 { font-size: 1.6rem; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 1.5rem; }
  .search-wrap { flex-direction: column; border-radius: var(--radius-sm); }
  .search-wrap button { border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
}

/* --- Lazy Load Placeholder --- */
img[loading="lazy"] { background: rgba(255,255,255,0.03); }

/* --- MCP Widget Placeholder --- */
.mcp-widget {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-md); padding: 20px; text-align: center;
  margin: 20px 0;
}
.mcp-widget p { color: var(--text-muted); font-size: 0.88rem; }