:root{--bg: #ffffff;--surface: #f6f7fb;--surface-2: #eef1f7;--border: #e6e8ef;--text: #1a1f2c;--muted: #6b7280;--brand: #1f6feb;--brand-dark: #1858c2;--accent: #0f172a;--radius: 10px;--maxw: 1180px;--shadow: 0 1px 2px rgba(15,23,42,.04), 0 4px 12px rgba(15,23,42,.06)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Helvetica Neue,Arial,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased}a{color:var(--brand);text-decoration:none}a:hover{color:var(--brand-dark)}.topbar{background:var(--accent);color:#cbd5e1;font-size:13px}.topbar-inner{max-width:var(--maxw);margin:0 auto;padding:8px 24px;display:flex;justify-content:space-between;gap:16px}.topbar a{color:#cbd5e1}.topbar a:hover{color:#fff}header.site{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:50}.nav{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:32px}.brand{display:flex;align-items:center;gap:12px}.brand img{height:32px;width:auto;display:block}.brand .cn{font-size:13px;color:var(--muted);border-left:1px solid var(--border);padding-left:12px;line-height:1.2}.brand .cn small{display:block;color:var(--muted);font-size:11px}nav.menu{display:flex;gap:4px;flex:1;justify-content:center}nav.menu a{padding:8px 14px;border-radius:8px;color:var(--text);font-size:14px;font-weight:500}nav.menu a:hover{background:var(--surface)}nav.menu a.active{background:var(--surface);color:var(--brand)}.search{display:flex;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:6px 12px;width:240px}.search input{border:0;background:transparent;outline:none;width:100%;font-size:13px;color:var(--text)}.search svg{width:16px;height:16px;color:var(--muted);flex-shrink:0}.hero{background:radial-gradient(1100px 380px at 80% -10%,rgba(31,111,235,.1),transparent 60%),linear-gradient(180deg,#fafbfd,#fff);border-bottom:1px solid var(--border)}.hero-inner{max-width:var(--maxw);margin:0 auto;padding:72px 24px 64px}.hero h1{font-size:40px;line-height:1.2;margin:0 0 16px;letter-spacing:-.02em}.hero h1 .accent{color:var(--brand)}.hero p{color:var(--muted);font-size:16px;max-width:680px;margin:0 0 28px}.page-hero{background:radial-gradient(800px 280px at 85% -10%,rgba(31,111,235,.1),transparent 60%),linear-gradient(180deg,#fafbfd,#fff);border-bottom:1px solid var(--border)}.page-hero-inner{max-width:var(--maxw);margin:0 auto;padding:44px 24px 36px}.crumbs{font-size:13px;color:var(--muted);margin-bottom:10px}.crumbs a{color:var(--muted)}.crumbs a:hover{color:var(--brand)}.crumbs span.sep{margin:0 6px;opacity:.5}.page-hero h1{font-size:30px;margin:0 0 8px;letter-spacing:-.01em}.page-hero .lede{color:var(--muted);margin:0;max-width:760px}.cta{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;padding:11px 20px;border-radius:8px;font-weight:500;font-size:14px}.cta:hover{background:var(--brand-dark);color:#fff}.cta.secondary{background:#fff;color:var(--text);border:1px solid var(--border);margin-left:8px}.cta.secondary:hover{background:var(--surface);color:var(--text)}section{padding:64px 24px}section .inner{max-width:var(--maxw);margin:0 auto}.section-head{margin-bottom:32px}.eyebrow{color:var(--brand);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase}.section-head h2{font-size:26px;margin:6px 0;letter-spacing:-.01em}.section-head p{color:var(--muted);margin:0}.brands{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.brand-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;display:block;color:inherit}.brand-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#d4dbe7;color:inherit}.brand-card .name{font-weight:600;font-size:16px;margin-bottom:4px}.brand-card .name-cn{color:var(--muted);font-size:13px;margin-bottom:12px}.brand-card .tags{display:flex;flex-wrap:wrap;gap:6px}.tag{font-size:11px;background:var(--surface);color:var(--muted);padding:3px 8px;border-radius:999px}.brand-card .arrow{color:var(--brand);font-size:13px;margin-top:14px}.news-section{background:var(--surface)}.news{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.news-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px}.news-item .date{font-size:12px;color:var(--muted);margin-bottom:6px}.news-item h3{font-size:15px;margin:0 0 8px}.news-item p{color:var(--muted);font-size:13px;margin:0}.layout-2col{display:grid;grid-template-columns:240px 1fr;gap:40px}.sidebar h4{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 12px}.sidebar ul{list-style:none;padding:0;margin:0 0 28px}.sidebar li{margin-bottom:2px}.sidebar a{display:block;padding:8px 12px;border-radius:8px;color:var(--text);font-size:14px}.sidebar a:hover{background:var(--surface);color:var(--brand)}.sidebar a.active{background:var(--brand);color:#fff;font-weight:500}.prose h2{font-size:22px;margin:0 0 14px;letter-spacing:-.01em}.prose h3{font-size:17px;margin:28px 0 10px}.prose p{color:#374151;margin:0 0 14px}.prose ul{color:#374151;padding-left:20px}.prose li{margin-bottom:6px}.matrix{width:100%;border-collapse:collapse;margin-top:12px;font-size:14px;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.matrix th,.matrix td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:top}.matrix th{background:var(--surface);font-weight:600;color:var(--text);white-space:nowrap}.matrix tr:last-child td{border-bottom:0}.matrix .cat{font-weight:500;white-space:nowrap;color:var(--text)}.subcats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}.subcat{display:block;padding:18px 18px 16px;border:1px solid var(--border);border-radius:var(--radius);background:#fff;color:var(--text);transition:border-color .15s ease,box-shadow .15s ease,transform .15s ease}.subcat:hover{border-color:#c7d3eb;box-shadow:var(--shadow);transform:translateY(-1px);color:var(--text)}.subcat .label{font-weight:600;font-size:15px}.subcat .desc{color:var(--muted);font-size:13px;margin-top:4px}.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:16px}.toolbar input[type=search]{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:8px;font-size:14px;background:#fff;outline:none}.toolbar input[type=search]:focus{border-color:var(--brand)}.toolbar .count{font-size:13px;color:var(--muted);white-space:nowrap}.model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}.model{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;background:var(--surface);border:1px solid var(--border);padding:8px 12px;border-radius:6px;color:var(--text);text-align:left;transition:background .12s ease,border-color .12s ease;cursor:pointer}.model:hover{background:#fff;border-color:var(--brand);color:var(--brand)}.callout{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;margin-top:24px;font-size:14px;color:var(--muted)}.callout strong{color:var(--text)}footer{background:var(--accent);color:#94a3b8;padding:40px 24px 24px;font-size:13px}.footer-inner{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:40px}footer h4{color:#fff;font-size:14px;margin:0 0 12px}footer a{color:#cbd5e1}footer a:hover{color:#fff}footer ul{list-style:none;padding:0;margin:0}footer li{margin-bottom:6px}.copyright{max-width:var(--maxw);margin:32px auto 0;padding-top:20px;border-top:1px solid #1e293b;text-align:center;color:#64748b;font-size:12px}@media(max-width:800px){nav.menu{display:none}.search{width:160px}.hero h1{font-size:30px}.layout-2col,.footer-inner{grid-template-columns:1fr;gap:24px}}