:root{color-scheme:light;--bg:#fcfcfd;--surface:#ffffff;--bg-soft:#f4f5f7;--text:#101319;--text-soft:#3f4753;--muted:#6b7480;--border:#e8eaee;--border-strong:#d6dae1;--accent:#2f5fe0;--radius:14px;--max-width:1280px;--page-padding:clamp(24px,4vw,48px)}*,:after,:before{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans SC,sans-serif;font-size:16px;line-height:1.75;letter-spacing:-.003em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:inherit;text-decoration:none}::selection{background:rgba(47,95,224,.14)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}.container{width:100%;max-width:var(--max-width);margin-inline:auto;padding-inline:var(--page-padding)}main{padding-bottom:112px}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:24px;top:12px;z-index:50;padding:8px 14px;border-radius:8px;background:var(--text);color:#fff}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:20;border-bottom:1px solid var(--border);background:rgba(255,255,255,.82);-webkit-backdrop-filter:blur(12px) saturate(180%);backdrop-filter:blur(12px) 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a[aria-current=page]{background:var(--text);color:#fff}.intro{padding-top:92px}.intro-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);grid-gap:56px;gap:56px;align-items:start}.intro-main{min-width:0}.kicker{display:inline-flex;align-items:center;gap:12px;margin:0 0 22px;color:var(--muted);font-size:.75rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase}.kicker:before{content:"";width:24px;height:1px;background:var(--border-strong)}.intro h1{max-width:24ch;margin:0 0 30px;font-size:clamp(1.9rem,4.4vw,2.6rem);font-weight:600;line-height:1.24;letter-spacing:-.028em}.intro-copy{max-width:58ch}.intro-copy p{margin:0 0 16px;color:var(--text-soft);font-size:1.02rem}.intro-copy 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ease}.card-link:hover{transform:translateY(-2px);border-color:var(--border-strong);box-shadow:0 1px 2px rgba(16,24,40,.04),0 18px 34px -26px rgba(16,24,40,.4)}.card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.card-title{margin:0;font-size:1.02rem;font-weight:600;letter-spacing:-.012em;transition:color .18s ease}.card-arrow{color:var(--border-strong);font-size:.95rem;line-height:1.5;transition:transform .18s ease,color .18s ease}.card-link:hover .card-arrow,.card-link:hover .card-title{color:var(--accent)}.card-link:hover .card-arrow{transform:translate(2px,-2px)}.card-summary{margin:0;color:var(--muted);font-size:.92rem;line-height:1.68}.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin:auto 0 0;padding:14px 0 0;list-style:none}.card-tags li{padding:3px 9px;border-radius:6px;background:var(--bg-soft);color:var(--muted);font-size:.75rem;line-height:1.6}.back-link{display:inline-block;margin-top:10px;color:var(--accent);font-size:.95rem}@media 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