:root{--bg:#f7f8fb;--card:#fff;--text:#202638;--muted:#687089;--line:#e9edf5;--brand:#ff684c;--brand2:#3d63ff;--dark:#101827;--radius:22px;--shadow:0 18px 50px rgba(24,33,61,.09)}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75}a{color:inherit;text-decoration:none}img,video{max-width:100%;display:block}.site-header{background:rgba(255,255,255,.96);position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px min(4vw,56px)}.brand-logo{display:flex;align-items:center;gap:12px;font-weight:800}.brand-logo img{width:168px;height:auto}.brand-logo span{color:var(--muted)}.domain-pill{padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--muted);font-size:14px}.main-nav{display:flex;align-items:center;gap:10px;padding:0 min(4vw,56px) 12px;overflow:auto}.nav-link{white-space:nowrap;padding:10px 14px;border-radius:999px;color:#394159;background:#f2f5fb}.nav-link.is-active,.nav-link:hover{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}.fake-search{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;padding:0 min(4vw,56px) 16px}.fake-search label{font-weight:700}.fake-search input{width:100%;border:1px solid var(--line);border-radius:999px;padding:12px 18px;font-size:15px;background:#fff}.fake-search button,.hero-actions a,.contact-actions a{border:0;border-radius:999px;padding:12px 18px;background:var(--dark);color:#fff;font-weight:700;cursor:pointer}.search-tip{grid-column:2/4;margin:0;color:var(--muted);font-size:14px;display:none}.search-tip.show{display:block}main{padding:26px min(4vw,56px) 48px}.hero,.page-hero{border-radius:32px;background:linear-gradient(135deg,#fff 0%,#fff6f0 48%,#eef3ff 100%);box-shadow:var(--shadow);padding:38px;display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center}.page-hero{display:block}.eyebrow{display:inline-flex;padding:7px 12px;border-radius:999px;background:#fff;color:var(--brand);font-weight:800}.hero h1,.page-hero h1{font-size:clamp(30px,4.4vw,58px);line-height:1.12;margin:12px 0}.hero p,.page-hero p{font-size:18px;color:#424b63}.hero-actions,.contact-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.hero-actions a:first-child,.contact-actions a:first-child{background:linear-gradient(135deg,var(--brand),var(--brand2))}.hero-media{margin:0}.hero-media img,.info-figure img{border-radius:26px;box-shadow:var(--shadow)}figcaption{margin-top:10px;color:var(--muted);font-size:14px}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:24px 0}.category-pill{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:0 10px 24px rgba(24,33,61,.04)}.category-pill strong{display:block;color:var(--brand2);font-size:18px}.category-pill span{display:block;color:var(--muted);font-size:14px;margin-top:6px}.section-wrap,.module-grid,.contact-panel{margin-top:30px}.section-wrap,.contact-panel{background:#fff;border-radius:28px;padding:28px;box-shadow:var(--shadow)}.section-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;margin-bottom:20px}.section-head h2{font-size:28px;margin:0}.section-head p{margin:4px 0 0;color:var(--muted)}.section-head a,.text-link{color:var(--brand2);font-weight:800}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.video-card{background:#fff;border:1px solid var(--line);border-radius:26px;overflow:hidden;box-shadow:0 12px 30px rgba(24,33,61,.06)}.section-wrap .video-card{background:#fbfcff}.poster-wrap{position:relative;display:block;aspect-ratio:16/10;background:#edf1f7;overflow:hidden}.poster-wrap video{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}.video-card:hover video{transform:scale(1.05);filter:saturate(1.06)}.play-btn{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.86);width:62px;height:62px;border-radius:50%;display:grid;place-items:center;background:rgba(16,24,39,.72);color:#fff;opacity:0;transition:.25s;font-size:24px}.video-card:hover .play-btn{opacity:1;transform:translate(-50%,-50%) scale(1)}.video-badge{position:absolute;left:14px;top:14px;border-radius:999px;background:rgba(255,104,76,.95);color:#fff;padding:6px 12px;font-weight:800}.card-body{padding:18px}.card-body h3{margin:0 0 10px;font-size:20px;line-height:1.35}.card-body p{color:var(--muted);margin:0 0 12px}.meta{font-size:13px;color:#737c96}.tags{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.tags span{padding:5px 9px;border-radius:999px;background:#eef3ff;color:#3d63ff;font-size:13px}.stats{display:flex;gap:8px;flex-wrap:wrap}.stats button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 10px;color:#3c4359;cursor:pointer}.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.module{background:#fff;border-radius:26px;padding:24px;border:1px solid var(--line);box-shadow:0 12px 30px rgba(24,33,61,.05)}.module .section-head{align-items:flex-start}.module h2{font-size:22px}.module-intro{color:var(--muted)}.module-list{padding-left:20px}.heat{display:flex;gap:8px;flex-wrap:wrap}.heat span{background:#fff7f3;color:#d94e35;border-radius:999px;padding:6px 10px;font-size:13px}.author-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}.author-card{background:#fbfcff;border:1px solid var(--line);border-radius:24px;padding:20px}.avatar{width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:grid;place-items:center;font-weight:900}.author-card h3{margin:12px 0 0}.role,.author-card p{color:var(--muted)}.author-stats{display:flex;flex-direction:column;gap:4px;font-size:14px;color:#424b63}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px}.faq-list details{border:1px solid var(--line);border-radius:18px;margin-bottom:10px;padding:14px;background:#fbfcff}.faq-list summary{font-weight:800;cursor:pointer}.comment-list{display:grid;gap:12px}.comment{display:flex;gap:12px;border:1px solid var(--line);border-radius:18px;padding:14px;background:#fbfcff}.comment p{margin:4px 0;color:var(--muted)}.comment span{font-size:13px;color:#8a92a8}.split{display:block}.contact-panel{background:linear-gradient(135deg,#101827,#273458);color:#fff}.contact-panel p{color:#dce4ff}.breadcrumb{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted)}.breadcrumb a{color:var(--brand2);font-weight:800}.page-domain{padding:10px 14px;background:#fff;border-radius:999px;display:inline-block}.check-list{padding-left:20px}.check-list li{margin:6px 0}.info-figure{margin:0}.site-footer{background:#101827;color:#dbe4ff;padding:36px min(4vw,56px)}.footer-grid{display:grid;grid-template-columns:220px 1fr 220px;gap:24px;align-items:center}.footer-logo img{width:210px}.site-footer h2,.site-footer h3{margin-top:0;color:#fff}.site-footer a{display:block;color:#dbe4ff;margin:6px 0}.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:24px;padding-top:18px;color:#aebce4}@media (max-width:1060px){.video-grid,.module-grid{grid-template-columns:repeat(2,1fr)}.author-grid,.quick-grid{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr}.two-col{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}}@media (max-width:680px){.topbar{align-items:flex-start;flex-direction:column}.brand-logo img{width:148px}.fake-search{grid-template-columns:1fr}.fake-search label{display:none}.search-tip{grid-column:auto}.hero,.page-hero,.section-wrap,.contact-panel{padding:22px;border-radius:22px}.video-grid,.module-grid,.author-grid,.quick-grid{grid-template-columns:1fr}.section-head{align-items:flex-start;flex-direction:column}.hero h1,.page-hero h1{font-size:32px}.main-nav{padding-bottom:10px}.footer-grid{grid-template-columns:1fr}}