:root{--bg:#f6f7fb;--card:#fff;--ink:#172033;--muted:#667085;--line:#e6e9f0;--brand:#3056d3;--soft:#eef3ff;--warm:#fff7e8}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.65}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.site-top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.wrap{width:min(1180px,94vw);margin:auto}.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:18px}.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:24px}.logo-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#3056d3,#7c3aed);display:grid;place-items:center;color:#fff}.nav{display:flex;gap:18px;flex-wrap:wrap;font-size:15px}.nav a{padding:8px 10px;border-radius:999px}.nav a:hover{background:var(--soft);color:var(--brand)}.search-row{padding:12px 0 18px}.search-box{display:flex;gap:10px;background:var(--soft);padding:10px;border-radius:18px}.search-box input{flex:1;border:0;background:#fff;border-radius:14px;padding:12px 14px;font-size:15px}.btn{border:0;border-radius:14px;padding:12px 18px;background:var(--brand);color:#fff;font-weight:700;cursor:pointer}.hero{padding:34px 0 20px}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}.panel{background:var(--card);border:1px solid var(--line);border-radius:26px;padding:24px;box-shadow:0 12px 34px rgba(16,24,40,.06)}.eyebrow{color:var(--brand);font-weight:800;margin:0 0 8px}.hero h1{font-size:42px;line-height:1.16;margin:0 0 14px}.lead{font-size:18px;color:var(--muted);margin:0 0 18px}.domain-pill{display:inline-flex;align-items:center;gap:8px;background:var(--warm);border:1px solid #ffe3a3;border-radius:999px;padding:8px 12px;color:#7a4b00;font-weight:700}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}.stat{background:#f8fafc;border-radius:18px;padding:14px}.stat strong{font-size:22px;display:block}.section{padding:22px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:14px}.section h2{margin:0;font-size:28px}.section p{color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;position:relative;overflow:hidden}.video-card{padding:0}.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#e5e7eb}.thumb img{width:100%;height:100%;object-fit:cover}.play{position:absolute;inset:0;display:grid;place-items:center;background:rgba(17,24,39,.0);opacity:0;transition:.2s}.play span{width:68px;height:68px;border-radius:50%;background:rgba(255,255,255,.92);display:grid;place-items:center;font-size:28px}.video-card:hover .play{opacity:1;background:rgba(17,24,39,.28)}.card-body{padding:16px}.meta,.tags,.actions{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:13px}.tags span{background:var(--soft);color:var(--brand);padding:4px 8px;border-radius:999px}.actions button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 10px;cursor:pointer}.module-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.module-item{display:flex;justify-content:space-between;gap:15px}.author-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.avatar{width:52px;height:52px;border-radius:18px;background:var(--soft);display:grid;place-items:center;color:var(--brand);font-weight:900}.faq{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.comment{border-left:4px solid var(--brand)}.footer{background:#101828;color:#d0d5dd;margin-top:30px;padding:36px 0}.footer a{color:#fff}.footer-grid{display:grid;grid-template-columns:1.2fr repeat(3,1fr);gap:22px}.breadcrumb{color:var(--muted);font-size:14px;margin:18px 0}.notice{background:#ecfdf3;border:1px solid #bbf7d0;color:#166534;border-radius:18px;padding:12px 14px}.json-box{white-space:pre-wrap;overflow:auto;max-height:70vh;background:#0b1020;color:#d1e7ff;border-radius:18px;padding:18px;font-size:13px}@media(max-width:860px){.hero-grid,.cards,.module-list,.author-list,.faq,.footer-grid{grid-template-columns:1fr}.hero h1{font-size:30px}.nav{display:none}.stats{grid-template-columns:1fr}.topbar{align-items:flex-start}.logo{font-size:21px}}