:root{color-scheme:light;--bg:#f3f5fa;--paper:#fff;--ink:#171c2e;--muted:#626b82;--line:#dfe3ee;--blue:#4354d3;--soft:#eef0ff}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.8 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif}a{color:var(--blue);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #5669ee;outline-offset:4px}.skip{position:absolute;top:-100px;left:16px;padding:10px;background:var(--paper);z-index:10}.skip:focus{top:8px}
.site-header{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:16px max(24px,calc((100vw - 1200px)/2));border-bottom:1px solid var(--line);background:#f3f5faf2;backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:750;text-decoration:none;color:var(--ink);white-space:nowrap}.brand img{border-radius:9px;flex-shrink:0}.site-header nav{display:flex;gap:22px;flex-wrap:wrap}.site-header nav a{font-size:14px;text-decoration:none}.site-header nav a:hover{text-decoration:underline}
main{max-width:1100px;margin:36px auto;padding:0 24px}article{min-width:0;background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:40px;overflow-wrap:anywhere}h1{font-size:32px;line-height:1.35;letter-spacing:-.6px;margin:0 0 24px}h2{font-size:23px;margin:36px 0 16px;line-height:1.5}h3{font-size:18px;margin:26px 0 10px}p{margin:14px 0}li{margin:5px 0}blockquote{margin:18px 0;padding:10px 18px;border-left:4px solid #5669ee;background:var(--soft);border-radius:0 12px 12px 0}blockquote p{margin:8px 0}code{font:14px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;background:#eef0f6;border-radius:5px;padding:2px 5px}pre{max-width:100%;overflow-x:auto;background:#171c2e;color:#f4f6ff;padding:20px;border-radius:14px}pre code{padding:0;background:none;color:inherit}ul,ol{padding-left:26px}.table-scroll{max-width:100%;overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.7}td,th{border-bottom:1px solid var(--line);padding:12px 14px;min-width:120px;text-align:left;vertical-align:top}th{background:var(--soft);font-weight:650}tr:last-child td{border-bottom:0}.kicker{font-size:12px;font-weight:700;letter-spacing:.09em;color:var(--blue)}.muted{color:var(--muted)}.note{border:1px solid var(--line);border-radius:14px;padding:16px;background:#f7f8fc}.source-link{border-top:1px solid var(--line);padding-top:20px;margin-top:32px;font-size:14px}
.with-toc{max-width:1300px;display:grid;grid-template-columns:240px minmax(0,1fr);gap:26px;align-items:start}.toc-panel{position:sticky;top:100px;max-height:calc(100vh - 130px);overflow:auto;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:16px;font-size:13px;line-height:1.6}.toc-panel ul{list-style:none;padding-left:10px}.toc-panel a{text-decoration:none}.toc-panel summary{font-weight:700;cursor:pointer}.toc-panel ul ul ul{display:none}
.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:44px;align-items:center;padding:16px 0 38px}.hero h1{font-size:46px;margin:14px 0 20px}.hero p{color:var(--muted)}.hero-icon{width:100px;border-radius:23px;box-shadow:0 10px 24px #5669ee26}.hero-screen{width:240px;margin:auto;border:7px solid #171c2e;border-radius:36px;display:block;box-shadow:0 22px 65px #171c2e20}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 20px;background:#5669ee;color:white;border:1px solid transparent;border-radius:12px;text-decoration:none;font-weight:650}.button.secondary{background:var(--soft);color:var(--blue);border-color:#dde1fc}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.card{display:block;padding:22px;border:1px solid var(--line);border-radius:18px;background:var(--paper);text-decoration:none;color:var(--ink)}a.card:hover{border-color:#8894f2;background:#fafbff}.card h2,.card h3{margin:0 0 9px;font-size:18px}.card p{margin:0;color:var(--muted);font-size:14px}.card .number{display:block;color:var(--blue);font-size:12px;font-weight:750;margin-bottom:8px}.language-switch{display:flex;justify-content:flex-end;font-size:14px;margin:0 0 24px}.search{width:100%;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);margin:8px 0 20px}.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.gallery figure{margin:0;min-width:0;border:1px solid var(--line);border-radius:16px;padding:12px;background:#f8f9fc}.gallery img{display:block;width:100%;height:330px;object-fit:contain}.gallery figcaption{font-size:12px;line-height:1.5;margin-top:12px}.files{display:grid;gap:8px;list-style:none;padding:0}.files a{display:block;border:1px solid var(--line);padding:10px 14px;border-radius:10px;font-size:14px}footer{max-width:1200px;margin:40px auto;padding:24px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}[hidden]{display:none!important}
@media(max-width:900px){.with-toc{display:block}.toc-panel{position:static;max-height:260px;margin-bottom:18px}.hero{gap:20px}.hero h1{font-size:36px}.gallery{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.site-header{position:static;display:block;padding:16px 18px}.site-header nav{gap:16px;margin-top:14px}.site-header nav a{font-size:13px}main{margin:22px auto;padding:0 14px}article{padding:24px 20px;border-radius:18px}h1{font-size:27px}h2{font-size:21px}.hero{grid-template-columns:1fr;padding:0 0 24px}.hero h1{font-size:34px}.hero-screen{width:210px}.cards{grid-template-columns:1fr}.gallery{gap:10px}.gallery img{height:260px}footer{flex-direction:column;padding:20px 18px;margin-top:26px}.actions .button{flex:1}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.toc-panel,footer,.source-link{display:none}.with-toc{display:block}main{max-width:none;margin:0;padding:0}article{border:0;padding:0}pre{white-space:pre-wrap}.table-scroll{overflow:visible}a{color:inherit}}