:root {
  --bg: #04110d;
  --bg-soft: #081713;
  --bg-card: rgba(255,255,255,0.05);
  --text: #edf6f0;
  --line: rgba(255,255,255,0.12);
  --muted: rgba(237,246,240,0.72);
  --dim: rgba(237,246,240,0.56);
  --accent: #9fd3b0;
  --accent-soft: rgba(159,211,176,0.12);
  --gold: #c8a84e;
  --radius: 14px;
  --radius-sm: 8px;
  --max-w: 1180px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--gold)}
button{cursor:pointer;font-family:inherit}

.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section-space{padding:72px 0}
.section-space-sm{padding:48px 0}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(4,17,13,0.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:12px 0}
.header-grid{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.brand-mark{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex-shrink:0}
.brand-mark img{width:42px;height:42px;border-radius:50%}
.brand-mark strong{font-size:1.2em;letter-spacing:.02em}
.brand-mark span{display:block;font-size:.65em;color:var(--dim);letter-spacing:.08em;text-transform:uppercase}
.site-nav{display:flex;gap:6px;flex-wrap:wrap;flex:1}
.site-nav a{padding:6px 14px;border-radius:var(--radius-sm);font-size:.88em;color:var(--muted);transition:all .2s}
.site-nav a:hover{background:var(--accent-soft);color:var(--accent)}
.site-domain{font-size:.78em;color:var(--dim);white-space:nowrap}

/* Search */
.search-panel{width:100%;margin-top:8px}
.search-panel label{display:block;font-size:.75em;color:var(--dim);margin-bottom:4px}
.search-row{display:flex;gap:8px}
.search-row input{flex:1;padding:10px 16px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-soft);color:var(--text);font-size:.9em;outline:none;transition:border-color .2s}
.search-row input:focus{border-color:var(--accent)}
.search-row button{padding:10px 24px;border:none;border-radius:var(--radius-sm);background:var(--accent);color:var(--bg);font-weight:700;font-size:.9em;transition:background .2s}
.search-row button:hover{background:var(--gold)}

/* Hero */
.hero-section{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(4,17,13,0.88) 0%,rgba(4,17,13,0.55) 60%,rgba(4,17,13,0.3) 100%)}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 340px;gap:48px;align-items:center}
.hero-copy{display:flex;flex-direction:column;gap:18px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--accent-soft);border:1px solid rgba(159,211,176,0.2);border-radius:20px;padding:6px 16px;font-size:.82em;color:var(--accent);width:fit-content}
.hero-copy h1{font-size:2.4em;line-height:1.25;font-weight:700;letter-spacing:-.01em}
.hero-copy p{font-size:1.05em;color:var(--muted);max-width:560px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.hero-actions a{padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:.95em;transition:all .2s}
.hero-actions a:first-child{background:var(--accent);color:var(--bg)}
.hero-actions a:first-child:hover{background:var(--gold)}
.hero-actions .ghost{border:1px solid var(--line);color:var(--muted)}
.hero-actions .ghost:hover{border-color:var(--accent);color:var(--accent)}
.hero-side{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;backdrop-filter:blur(8px)}
.hero-side h2{font-size:1.1em;margin-bottom:12px}

/* Stats */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center}
.stats-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 12px}
.stats-card strong{display:block;font-size:1.6em;color:var(--accent)}
.stats-card small{color:var(--dim);font-size:.82em}

/* Eyebrow */
.eyebrow{display:inline-block;font-size:.78em;color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px}

/* Breadcrumbs */
.crumbs{font-size:.82em;color:var(--dim);margin-bottom:12px}
.crumbs span{margin:0 4px;opacity:.5}

/* Section titles */
.section-head{text-align:center;max-width:680px;margin:0 auto 40px}
.section-head h2{font-size:1.8em;margin-bottom:8px}
.section-head p{color:var(--muted);font-size:.95em}

/* Video cards */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.video-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s}
.video-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.3)}
.video-thumb{position:relative;aspect-ratio:16/9;background:var(--bg-soft);overflow:hidden}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.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(0,0,0,0.4);opacity:0;transition:opacity .25s}
.video-card:hover .play-btn{opacity:1}
.play-btn span{width:56px;height:56px;background:var(--accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.4em;color:var(--bg)}
.video-info{padding:18px}
.video-info h3{font-size:1em;margin-bottom:6px;line-height:1.4}
.video-info p{font-size:.85em;color:var(--muted);margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tag-row{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.tag-row span{padding:3px 10px;border-radius:12px;font-size:.75em;background:var(--accent-soft);color:var(--accent)}
.video-metrics{display:flex;gap:16px;font-size:.78em;color:var(--dim)}
.video-metrics div{display:flex;flex-direction:column;align-items:center}
.video-metrics strong{color:var(--text);font-size:1.1em}
.video-badge{position:absolute;top:10px;left:10px;padding:3px 10px;border-radius:10px;font-size:.72em;font-weight:600;background:var(--gold);color:var(--bg)}
.video-duration{position:absolute;bottom:10px;right:10px;padding:2px 8px;border-radius:6px;font-size:.72em;background:rgba(0,0,0,0.7);color:#fff}

/* Three column grid */
.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* Panel card */
.panel-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.panel-card h2{font-size:1.2em;margin-bottom:12px}
.panel-card h3{font-size:1.05em;margin:16px 0 8px}
.panel-card p{font-size:.9em;color:var(--muted);margin-bottom:8px}

/* Split grid */
.split-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.top-align{align-items:start}

/* Dark band */
.dark-band{background:var(--bg-soft)}

/* Image frame */
.image-frame{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.image-frame.large{grid-column:span 2}
.image-frame img{width:100%;display:block}

/* Expert cards */
.expert-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.expert-card .avatar{width:72px;height:72px;border-radius:50%;background:var(--accent-soft);margin:0 auto 12px;display:flex;align-items:center;justify-content:center;font-size:1.8em;color:var(--accent)}
.expert-card h3{font-size:1em;margin-bottom:4px}
.expert-card .role{font-size:.82em;color:var(--accent);margin-bottom:8px}
.expert-card p{font-size:.85em;color:var(--muted);margin-bottom:12px}
.expert-card .awards{font-size:.78em;color:var(--gold);margin-bottom:12px}
.expert-actions{display:flex;gap:8px;justify-content:center}
.expert-actions button{padding:6px 16px;border-radius:var(--radius-sm);font-size:.82em;border:1px solid var(--line);background:transparent;color:var(--muted);transition:all .2s}
.expert-actions button:hover{border-color:var(--accent);color:var(--accent)}

/* Logo grid */
.logo-grid{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}
.logo-pill{padding:10px 24px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-card);font-size:.88em;color:var(--muted);transition:all .2s}
.logo-pill:hover{border-color:var(--accent);color:var(--accent)}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;counter-reset:step}
.step-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;counter-increment:step}
.step-no{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--accent);color:var(--bg);font-weight:700;font-size:.9em;margin-bottom:12px}
.step-card h3{font-size:.95em;margin-bottom:6px}
.step-card p{font-size:.85em;color:var(--muted)}

/* Review cards */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.review-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.review-head .avatar{width:40px;height:40px;border-radius:50%;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;font-size:1em;color:var(--accent)}
.review-head div h4{font-size:.9em;margin-bottom:2px}
.review-head div small{font-size:.78em;color:var(--dim)}
.review-card .stars{color:var(--gold);font-size:.9em;margin-bottom:8px}
.review-card p{font-size:.88em;color:var(--muted)}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-card{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.faq-card summary{padding:16px 20px;font-weight:600;font-size:.95em;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-card summary::after{content:'+';font-size:1.2em;color:var(--accent);transition:transform .2s}
.faq-card[open] summary::after{transform:rotate(45deg)}
.faq-card .faq-body{padding:0 20px 16px;font-size:.9em;color:var(--muted)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.contact-info p{font-size:.9em;color:var(--muted);margin-bottom:8px}
.contact-info strong{color:var(--text)}
.qr-grid{display:flex;gap:24px;margin-top:16px}
.qr-card{text-align:center}
.qr-card img{width:120px;height:120px;border-radius:var(--radius-sm);border:1px solid var(--line);margin-bottom:6px}
.qr-card h3{font-size:.85em;color:var(--muted)}

/* Keyword cloud */
.keyword-cloud{display:flex;flex-wrap:wrap;gap:8px}
.keyword-cloud span{padding:4px 12px;border-radius:12px;font-size:.78em;background:var(--accent-soft);color:var(--accent)}
.keyword-cloud.mini span{font-size:.72em;padding:3px 8px}

/* JSON card */
.json-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.json-head{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid var(--line)}
.json-head h3{font-size:.9em}
.json-head span{font-size:.75em;color:var(--dim)}
.json-card pre{padding:16px 20px;font-size:.78em;color:var(--muted);overflow-x:auto;white-space:pre-wrap;word-break:break-all}

/* Footer */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:1fr auto;gap:32px;align-items:start}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand img{width:48px;height:48px;border-radius:50%}
.footer-brand h2{font-size:1.1em}
.footer-brand p{font-size:.82em;color:var(--dim)}
.footer-copy{font-size:.82em;color:var(--dim);max-width:600px;line-height:1.6}
.footer-meta{text-align:right}
.footer-line{font-size:.82em;color:var(--dim);margin-bottom:12px}
.footer-line span{margin-left:16px}
.share-row{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.share-row button{padding:6px 14px;border-radius:var(--radius-sm);border:1px solid var(--line);background:transparent;color:var(--muted);font-size:.8em;transition:all .2s}
.share-row button:hover{border-color:var(--accent);color:var(--accent)}

/* Sub hero for inner pages */
.sub-hero{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.big-panel{background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius);padding:32px}
.big-panel h2{font-size:1.15em;margin-bottom:10px}
.big-panel h3{font-size:1em;margin:14px 0 6px}
.big-panel h4{font-size:.92em;margin:12px 0 6px;color:var(--accent)}
.big-panel h5{font-size:.88em;margin:10px 0 4px;color:var(--gold)}
.big-panel h6{font-size:.82em;margin:8px 0 4px;color:var(--dim)}
.big-panel p{font-size:.88em;color:var(--muted);margin-bottom:6px}

/* Mini panels */
.mini-panels{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.mini-panels .panel-card{padding:20px}

/* Play badge */
.play-badge{display:flex;align-items:center;gap:6px;background:var(--accent-soft);border-radius:16px;padding:4px 12px;font-size:.78em;color:var(--accent)}
.play-badge span{font-size:1.1em}

/* Video top */
.video-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px}
.video-summary{font-size:.88em;color:var(--muted);margin-bottom:10px}

/* Responsive */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .hero-side{display:none}
  .split-grid{grid-template-columns:1fr}
  .three-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-meta{text-align:left}
  .share-row{justify-content:flex-start}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .mini-panels{grid-template-columns:1fr}
  .image-frame.large{grid-column:span 1}
}
@media(max-width:600px){
  .hero-copy h1{font-size:1.6em}
  .section-space{padding:48px 0}
  .video-grid{grid-template-columns:1fr}
  .expert-list{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .header-grid{gap:12px}
  .site-nav{gap:4px}
  .site-nav a{padding:4px 10px;font-size:.82em}
}