:root{--ink:#272620;--muted:#726f68;--line:#e0dbd0;--paper:#faf9f5;--back:#edeae3;--card:#fffefa;--coral:#e65e45;--cobalt:#434be0;--mint:#d8e8e1;--gold:#f2e5bf;--shadow:0 16px 38px rgba(57,45,30,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif;background:var(--paper);color:var(--ink);font-size:15px}button,input,select,textarea{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(67,75,224,.45);outline-offset:2px}a{text-decoration:none;color:inherit}a:hover{color:var(--coral)}.wrap{width:min(1580px,calc(100% - 72px));margin:auto}.skip{position:absolute;left:-9999px;top:auto}.skip:focus{left:12px;top:12px;z-index:99;background:white;padding:12px}
/* Deliberately not a marketing hero: this is a working application shell. */
.top{background:#fffefa;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}.top .wrap{height:77px;display:flex;align-items:center;gap:26px}.symbol{width:39px;height:39px;border-radius:11px;background:var(--ink);color:#fff;display:grid;place-items:center;font-weight:900;font-size:17px;position:relative;letter-spacing:-.1em}.symbol:after{content:"";width:11px;height:11px;background:var(--coral);border:3px solid #fffefa;border-radius:50%;position:absolute;right:-6px;bottom:-5px}.identity{display:flex;align-items:center;gap:13px;flex-shrink:0}.identity .name{font-size:17px;font-weight:900;letter-spacing:-.03em;white-space:nowrap}.identity .small{display:block;color:var(--muted);font-size:11px;margin-top:3px;font-weight:600;letter-spacing:.12em}.topnav{display:flex;gap:5px;margin-left:auto;overflow-x:auto;scrollbar-width:none}.topnav a{display:block;white-space:nowrap;padding:12px 13px;border-radius:11px;color:#5b5750;font-size:13px;font-weight:750}.topnav a:hover{background:#f4f0e9;color:var(--ink)}.topnav a[aria-current=page]{color:white;background:var(--ink)}.online{font-size:12px;color:#346352;background:#e8f3ed;border:1px solid #d5eadf;border-radius:99px;white-space:nowrap;padding:8px 10px;font-weight:800}
.ticker{background:#ece8df;border-bottom:1px solid #ded9ce}.ticker .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:47px}.eyebrow{font-size:11px;letter-spacing:.18em;font-weight:900;color:#786f61;text-transform:uppercase}.ticker .right{color:#807b71;font-size:12px}.ticker .dot{display:inline-block;width:8px;height:8px;background:var(--coral);border-radius:50%;margin-right:9px}
.pagehead{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;padding:35px 0 25px}.pagehead h1{font-size:clamp(26px,3vw,39px);letter-spacing:-.045em;margin:8px 0 10px;line-height:1.25}.pagehead p{color:var(--muted);line-height:1.8;margin:0;max-width:800px}.pagespot{border:1px solid var(--line);border-radius:15px;padding:12px 16px;white-space:nowrap;font-size:12px;color:var(--muted);background:#fffefa}.pagespot strong{font-size:18px;display:block;color:var(--ink)}.labbar{background:#292821;color:#f2efe8;border-radius:16px 16px 0 0;display:flex;align-items:center;gap:10px;padding:13px 16px;border:1px solid #292821;flex-wrap:wrap}.lamp{display:flex;gap:5px;margin-right:10px}.lamp i{display:block;width:9px;height:9px;border-radius:50%;background:#f2bba6}.lamp i:nth-child(2){background:#e1c777}.lamp i:nth-child(3){background:#99c7b9}.labbar strong{font-size:13px}.labbar small{font-size:12px;color:#c9c3b8}.labbar .right{margin-left:auto;display:flex;align-items:center;gap:7px;flex-wrap:wrap}.labbar .type{padding:6px 10px;color:#d4cfc2;border-radius:8px;border:1px solid #545148;font-size:11px;font-family:ui-monospace,Consolas,monospace}
.workbench{display:grid;grid-template-columns:minmax(0,1fr) 340px;align-items:stretch;border:1px solid var(--line);border-top:none;background:white;border-radius:0 0 17px 17px;min-height:545px;overflow:hidden;box-shadow:var(--shadow)}.canvas-shell{min-width:0;border-right:1px solid var(--line);display:flex;flex-direction:column}.canvas-nav{padding:16px 20px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;min-height:66px;border-bottom:1px solid var(--line)}.canvas-nav .label{font-size:12px;color:var(--muted);font-weight:800}.pillbtn{border:1px solid #dcd8ce;background:#fffefa;border-radius:9px;padding:8px 11px;font-size:12px;font-weight:800;color:#554f49}.pillbtn:hover{background:#f5f1eb}.pillbtn.active{color:#fff;background:var(--cobalt);border-color:var(--cobalt)}.canvas-nav .right{margin-left:auto;font-size:12px;color:#8c867d}.canvas-body{padding:30px;flex:1;background-color:#f2f0eb;background-image:radial-gradient(#d0c9bc .8px,transparent .8px);background-size:18px 18px;display:grid;place-items:center;overflow:hidden}.artboard{background:#fffef9;border:1px solid #e0ded4;box-shadow:0 18px 50px rgba(28,27,21,.13);width:100%;max-width:900px;padding:26px;min-height:350px;transition:background .2s}.art-head{display:flex;justify-content:space-between;gap:12px;align-items:center;padding-bottom:14px;border-bottom:1px solid #ebe7dc;margin-bottom:16px}.art-head strong{font-size:14px}.art-head span{font-family:ui-monospace,monospace;color:#817c72;font-size:10px}.tile-grid{display:grid;grid-template-columns:repeat(var(--col),minmax(0,1fr));gap:var(--gap)}.tile{height:var(--height);min-width:0;border-radius:var(--radius);position:relative;display:flex;align-items:flex-end;padding:13px;color:#282620;border:1px solid rgba(39,37,30,.08);overflow:hidden;cursor:pointer;transition:transform .15s}.tile:hover{transform:translateY(-2px)}.tile.selected{outline:3px solid #363ccc;outline-offset:3px}.tile .num{position:absolute;top:12px;left:12px;font-family:ui-monospace,monospace;font-size:12px;font-weight:800;opacity:.67}.tile b{font-size:clamp(12px,1vw,15px);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tile::after{content:"↗";position:absolute;right:12px;top:8px;font-size:17px;opacity:.5}.tile:nth-child(6n + 1){background:#e7e7fb}.tile:nth-child(6n + 2){background:#ffe4d5}.tile:nth-child(6n + 3){background:#e7eed9}.tile:nth-child(6n + 4){background:#dbeaf1}.tile:nth-child(6n + 5){background:#f6e6c5}.tile:nth-child(6n + 6){background:#eddfec}.artboard[data-theme=mono] .tile{background:#ecebe7;color:#2f2e2b}.artboard[data-theme=bold] .tile:nth-child(odd){background:#303bdf;color:white}.artboard[data-theme=bold] .tile:nth-child(even){background:#ffae8d;color:#2c211f}.art-tail{margin-top:18px;display:flex;justify-content:space-between;gap:12px;color:#918b81;font-size:11px;font-family:ui-monospace,monospace}.inspector{padding:23px 22px;min-width:0;background:#fffefa}.inspector h2{font-size:17px;margin:0 0 6px}.inspector .hint{font-size:12px;line-height:1.6;color:var(--muted);margin:0 0 21px}.control{margin:19px 0}.control label{display:flex;justify-content:space-between;gap:12px;font-size:12px;font-weight:850;margin-bottom:10px}.control output{font-weight:900;color:var(--cobalt);font-family:ui-monospace,monospace}.control input[type=range]{display:block;width:100%;accent-color:var(--cobalt)}.select,.field,textarea{width:100%;border:1px solid #dcd8cd;border-radius:11px;background:white;padding:11px 12px;color:var(--ink);font-size:13px}.tinyhelp{font-size:11px;color:#948c7e;line-height:1.6}.actions{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}.btn{border:1px solid var(--line);background:white;color:var(--ink);border-radius:10px;padding:10px 13px;font-size:13px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:6px}.btn:hover{background:#f1eee9;color:var(--ink)}.btn.primary{background:var(--ink);color:white;border-color:var(--ink)}.btn.primary:hover{background:#44423b}.btn.hot{background:var(--coral);color:white;border-color:var(--coral)}.btn.hot:hover{background:#ce523b}.full{width:100%}.codepanel{background:#171a21;color:#edf1e9;border-radius:15px;overflow:hidden;border:1px solid #20252c;margin:17px 0 30px}.codehead{padding:15px 20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid #30343a}.codehead strong{font-size:12px;letter-spacing:.06em}.codehead .right{margin-left:auto;display:flex;gap:7px;flex-wrap:wrap}.codehead .btn{border-color:#424850;background:#272b32;color:white}.codepanel pre{margin:0;padding:22px;overflow:auto;font:12px/1.85 ui-monospace,"SFMono-Regular",Consolas,monospace;max-height:340px;white-space:pre-wrap;overflow-wrap:anywhere}.status{display:flex;align-items:center;gap:8px;color:#8b877e;font-size:12px}.status::before{content:"";width:8px;height:8px;background:#56ae8b;border-radius:50%}
.section-head{margin:45px 0 18px;display:flex;align-items:center;gap:15px}.section-head h2{font-size:20px;margin:0;letter-spacing:-.03em}.section-head span{color:var(--muted);font-size:12px}.linefeature{border-top:1px solid var(--line);padding:19px 4px;display:grid;grid-template-columns:58px 1.1fr 2fr 100px;align-items:center;gap:18px}.linefeature:last-child{border-bottom:1px solid var(--line)}.linefeature .idx{font:12px ui-monospace,monospace;color:#aaa094}.linefeature strong{font-size:15px}.linefeature p{color:var(--muted);margin:0;font-size:13px;line-height:1.7}.linefeature a{font-size:12px;font-weight:800;text-align:right;color:var(--cobalt)}
.footer{margin-top:52px;padding:25px 0 35px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:18px;font-size:12px;color:#827b70;flex-wrap:wrap}.footer a{color:#504d48;text-decoration:underline;text-underline-offset:3px}.footer .brandnote{font-weight:800;color:#504d48}.inner{padding-bottom:12px}.largebox{background:#fffdfa;border:1px solid var(--line);border-radius:15px;padding:30px;box-shadow:var(--shadow)}.textbody{font-size:14px;line-height:2;color:#645e55}.textbody h2{font-size:20px;color:var(--ink);margin-top:24px;line-height:1.4}.textbody p{margin:0 0 18px}.textbody ul{padding-left:19px}.toolsplit{display:grid;grid-template-columns:1fr 335px;gap:20px}.stage{background:#e8e5dd;min-height:445px;border-radius:17px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;background-image:linear-gradient(90deg,transparent 49.85%,#ccc3b3 50%,transparent 50.15%),linear-gradient(transparent 49.85%,#ccc3b3 50%,transparent 50.15%)}.stage:before{content:"动画舞台 /  60 FPS";position:absolute;top:18px;left:20px;font-size:11px;font-family:monospace;color:#7f786e;letter-spacing:.09em}.animated-sample{width:100px;height:100px;background:linear-gradient(130deg,#4249e5,#79cfdb);box-shadow:18px 21px 0 rgba(41,49,64,.08);border-radius:20px;display:grid;place-items:center;color:white;font-weight:900;user-select:none;position:relative;z-index:1;animation-play-state:paused;will-change:transform}.animated-sample:after{content:"A·01"}.sideform{border:1px solid var(--line);border-radius:15px;background:#fffefa;padding:20px}.sideform h2{font-size:17px;margin:0 0 6px}.sideform p{color:var(--muted);font-size:12px;line-height:1.65;margin:0 0 18px}.compatbar{display:flex;justify-content:space-between;align-items:center;gap:15px;border:1px solid var(--line);border-radius:15px;background:white;padding:16px 19px;margin-bottom:13px}.compatbar strong{display:block;margin-bottom:4px}.compatbar small{color:#8a8379}.compatbar .ok{border-radius:99px;padding:7px 11px;font-size:12px;font-weight:850;background:#e2f2e8;color:#27724b;white-space:nowrap}.compatbar .no{background:#fae7e1;color:#a75440}.compatbar .unknown{background:#e9e7df;color:#625f59}.diaggrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.diagitem{border:1px solid var(--line);border-radius:15px;padding:17px;background:white}.diagitem .icon{font-size:21px}.diagitem strong{font-size:14px;display:block;margin-top:10px}.diagitem small{color:var(--muted);display:block;margin-top:7px;line-height:1.6}.diagitem .state{font-weight:850;font-size:12px;color:#2f8b61;display:block;margin-top:10px}.diagitem .state.warn{color:var(--coral)}.two-column{display:grid;grid-template-columns:1.5fr 1fr;gap:18px}.editorial{padding:25px;border:1px solid var(--line);border-radius:15px;background:#fffefa}.editorial h2{font-size:19px;margin:6px 0 12px}.editorial p{color:var(--muted);font-size:13px;line-height:1.85}.editorial a{font-weight:800;color:var(--cobalt);font-size:13px}.visualmark{min-height:230px;border-radius:14px;background:#ebe7e0;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.visualmark:before{content:"";width:180px;height:180px;border:23px solid var(--cobalt);border-radius:44px;transform:rotate(-25deg)}.visualmark:after{content:"";position:absolute;width:75px;height:75px;border-radius:20px;background:var(--coral);transform:translate(65px,65px) rotate(23deg)}.table{border-collapse:collapse;width:100%;font-size:13px}.table td,.table th{padding:13px 11px;border-bottom:1px solid var(--line);text-align:left}.table th{font-weight:850;width:170px}.linklink{color:var(--cobalt);font-weight:850}.toast{position:fixed;bottom:22px;right:25px;padding:12px 17px;border-radius:12px;background:#252922;color:white;box-shadow:0 20px 35px rgba(0,0,0,.16);opacity:0;transform:translateY(15px);pointer-events:none;transition:.2s;z-index:80;font-size:13px}.toast.show{opacity:1;transform:translateY(0)}
@media(max-width:1100px){.workbench{grid-template-columns:1fr}.canvas-shell{border-right:0;border-bottom:1px solid var(--line)}.inspector{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.inspector>h2,.inspector>.hint,.inspector>.actions,.inspector>.tinyhelp{grid-column:1/-1}.toolsplit{grid-template-columns:1fr}.topnav a{padding:9px}.online{display:none}}
@media(max-width:740px){.wrap{width:calc(100% - 30px)}.top .wrap{height:auto;padding:14px 0;display:flex;flex-wrap:wrap;gap:13px}.topnav{width:100%;order:2;margin-left:0}.topnav a{font-size:12px}.ticker .wrap{align-items:flex-start;padding:11px 0;display:block}.ticker .right{margin-top:6px}.pagehead{display:block;padding:26px 0 18px}.pagespot{margin-top:15px;display:inline-block}.canvas-body{padding:13px}.artboard{padding:13px;min-height:275px}.tile{height:min(var(--height),130px);padding:7px}.tile::after{font-size:12px;right:6px;top:7px}.tile .num{top:7px;left:6px}.tile b{font-size:11px}.inspector{display:block;padding:17px}.labbar{border-radius:10px 10px 0 0}.labbar .right{margin-left:0}.linefeature{grid-template-columns:30px 1fr 60px;gap:10px}.linefeature p{grid-column:2/4;grid-row:2}.footer{margin-top:30px}.largebox{padding:18px}.diaggrid,.two-column{grid-template-columns:1fr}.stage{min-height:290px}.visualmark{min-height:200px}.topnav{scrollbar-width:auto}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}