:root{
  --bg:#0b0f17; --panel:#121826; --panel-2:#0f1420; --text:#e7ecf3; --muted:#9aa7b8;
  --line:#1f2937; --accent:#4cc2ff; --accent-2:#7ee787; --warn:#ffb86b; --code:#0a0e15;
  --radius:8px; --max:1120px;
}
*{box-sizing:border-box}
html{color-scheme:dark;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  overflow-x:hidden}
a{color:var(--accent);text-decoration:none;touch-action:manipulation}
a:hover{text-decoration:underline}
button,select,[tabindex]{touch-action:manipulation}
:where(a,button,select,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(11,15,23,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:20px;height:60px;flex-wrap:wrap}
.brand{font-weight:700;color:var(--text);letter-spacing:0}
.nav{display:flex;gap:16px;flex:1;flex-wrap:wrap}
.nav a{color:var(--muted)}
.nav a:hover{color:var(--text)}
.nav a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}
.lang a{color:var(--muted);margin-left:6px;font-size:13px}
.lang a.active{color:var(--accent);font-weight:700}
.page{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:40px;padding:32px 20px 56px}
.content{min-width:0}
.content h1{font-size:32px;line-height:1.3;margin:.2em 0 .4em}
.content h2{font-size:23px;margin:2em 0 .6em;padding-top:8px;border-top:1px solid var(--line)}
.content h3{font-size:18px;margin:1.6em 0 .5em}
.content :where(h1,h2,h3,h4,h5,h6,[id]){scroll-margin-top:84px}
.content p{margin:.8em 0}
.content ul,.content ol{padding-left:1.3em}
.content li{margin:.35em 0}
.content img{max-width:100%;height:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.content a:not(.btn){text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.16em}
.evidence-video{margin:1.3em 0;padding:12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}
.evidence-video video{display:block;width:min(100%,480px);margin:0 auto;aspect-ratio:1/1;background:#000;border:1px solid var(--line);border-radius:6px}
.evidence-video figcaption{max-width:66ch;margin:10px auto 0;color:var(--muted);font-size:.9rem;text-align:center}
.media-transcript{max-width:74ch;margin:1em 0 1.4em;padding:12px 15px;border-left:3px solid var(--accent);background:rgba(255,255,255,.025);font-size:.92rem}
.media-transcript strong{display:block;margin-bottom:6px}
.media-transcript p{margin:0;color:var(--muted)}
.figure-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.2em 0 .4em;padding:0 0 5px}
.figure-scroll a{display:block;width:100%}
.figure-scroll a:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:3px}
.figure-scroll img{display:block;width:100%;max-width:100%;border:1px solid var(--line);border-radius:var(--radius)}
.content blockquote{margin:1em 0;padding:.6em 1em;border:1px solid var(--line);background:var(--panel-2);color:var(--muted)}
.content code{background:var(--code);border:1px solid var(--line);border-radius:4px;padding:.1em .35em;font-size:13.5px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow-wrap:anywhere}
.content pre{background:var(--code);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;overflow:auto}
.content pre code{background:none;border:none;padding:0;font-size:13px;line-height:1.6}
.content table{width:100%;border-collapse:collapse;margin:1em 0;font-size:14.5px}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1em 0}
.table-wrap table{margin:0;min-width:420px}
.content th,.content td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.content th{background:var(--panel)}
.toc{position:sticky;top:80px;align-self:start;font-size:14px;border-left:1px solid var(--line);padding-left:16px;max-height:80vh;overflow:auto}
.toc-title{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px}
.toc ul{list-style:none;margin:0;padding:0}
.toc li{margin:5px 0}
.toc .lvl-3{padding-left:12px}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--text)}
.hero{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:28px;align-items:start;padding:8px 0 4px}
.hero h1{font-size:34px;margin:0 0 10px}
.hero .lead{color:var(--muted);font-size:17px}
.hero-media img{width:100%;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0 8px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px}
.stat b{display:block;font-size:20px}
.stat span{color:var(--muted);font-size:12.5px}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:18px 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.card h3{margin:.1em 0 .4em;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.ad{margin:26px 0;min-height:90px;border:1px dashed var(--line);border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;background:var(--panel-2)}
.product-card{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:24px;border:1px solid var(--line);
  border-radius:var(--radius);padding:20px;background:linear-gradient(180deg,var(--panel),var(--panel-2));margin:18px 0}
.badge{display:inline-block;font-size:12px;color:var(--accent-2);border:1px solid var(--line);border-radius:999px;padding:2px 10px;margin-bottom:6px}
.price{font-size:26px;font-weight:700;margin-bottom:10px}
.btn{display:block;text-align:center;background:var(--accent);color:#04121c;font-weight:700;
  padding:10px 14px;border-radius:var(--radius)}
.btn:hover{text-decoration:none;filter:brightness(1.05)}
.btn-disabled{background:transparent;border:1px dashed var(--line);color:var(--muted);cursor:not-allowed}
.ticks{margin:8px 0 0;padding-left:1.1em;color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:13px}
.post-list{list-style:none;padding:0;margin:18px 0}
.post-list li{border-bottom:1px solid var(--line);padding:14px 0}
.post-list a{font-weight:600;font-size:17px}
.post-list p{margin:.3em 0 0;color:var(--muted);font-size:14.5px}
.guide-filter{margin:20px 0 8px}
.guide-filter[hidden],.guide-reset[hidden],.guide-empty[hidden],.guide-item[hidden]{display:none}
.guide-search-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:center}
.guide-search{position:relative;display:block;min-width:0}
.guide-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}
.guide-search input{
  width:100%;min-height:44px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--text);
  padding:10px 12px 10px 40px;font:inherit;font-size:16px
}
.guide-search input::placeholder{color:var(--muted);opacity:1}
.guide-search input::-webkit-search-cancel-button,
.guide-search input::-webkit-search-decoration{-webkit-appearance:none;appearance:none}
.guide-search input::-ms-clear{display:none;width:0;height:0}
.guide-search input:hover{border-color:#314158}
.guide-search input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.guide-reset{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;border:1px solid var(--line);
  border-radius:7px;background:transparent;color:var(--muted);padding:8px 12px;font:inherit;font-size:13.5px;
  font-weight:600;cursor:pointer
}
.guide-reset:hover{color:var(--text);border-color:var(--accent)}
.guide-count{margin:8px 0 0;color:var(--muted);font-size:13px}
.guide-topic-row{
  display:flex;max-width:100%;margin:12px 0 0;overflow-x:auto;overscroll-behavior-inline:contain;
  border:1px solid var(--line);border-radius:7px;background:var(--panel-2);
  scrollbar-width:thin;scrollbar-color:var(--line) transparent
}
.guide-topic-button{
  min-height:40px;border:0;border-left:1px solid var(--line);background:transparent;color:var(--muted);
  padding:8px 13px;font:inherit;font-size:13.5px;font-weight:600;white-space:nowrap;cursor:pointer
}
.guide-topic-button:first-child{border-left:0}
.guide-topic-button:hover{background:rgba(255,255,255,.04);color:var(--text)}
.guide-topic-button[aria-pressed=true]{background:var(--accent);color:#04121c}
.guide-empty{margin:18px 0;padding:18px;border:1px dashed var(--line);border-radius:8px;background:var(--panel-2)}
.guide-empty strong{display:block;margin-bottom:4px}
.guide-empty p{margin:0;color:var(--muted)}
.site-footer{border-top:1px solid var(--line);background:var(--panel-2);padding:28px 0;margin-top:20px}
.demo-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-2);padding:14px;margin:16px 0}
.demo-card canvas{display:block;width:100%;height:auto;background:#0b0f17;border-radius:6px}
.demo-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:10px;font-size:14px;color:var(--muted)}
.demo-controls button{background:var(--accent);color:#04121c;border:0;border-radius:6px;padding:7px 14px;font-weight:700;cursor:pointer}
.demo-controls select{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:6px;padding:6px 8px}
.demo-views{display:inline-flex;margin:0 0 10px;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.demo-views button{background:transparent;color:var(--muted);border:0;padding:7px 14px;font-weight:600;cursor:pointer;font-size:13.5px}
.demo-views button+button{border-left:1px solid var(--line)}
.demo-views button.active{background:var(--accent);color:#04121c}
.demo-legend{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-top:6px}
.capture-checker{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel-2);padding:16px;margin:18px 0}
.checker-toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.checker-file-input{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
.checker-file-button,.checker-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:40px;border-radius:6px;padding:8px 14px;font-weight:700;cursor:pointer}
.checker-file-button{background:var(--accent);color:#04121c}
.checker-file-button:hover{filter:brightness(1.05);text-decoration:none}
.checker-secondary{background:transparent;color:var(--text);border:1px solid var(--line)}
.checker-secondary:hover{border-color:var(--accent);color:var(--accent)}
.checker-toolbar:has(.checker-file-input:focus-visible) .checker-file-button,.checker-secondary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.capture-checker button:disabled,.checker-toolbar:has(.checker-file-input:disabled) .checker-file-button{opacity:.55;cursor:wait}
.checker-privacy{color:var(--muted);font-size:13px;margin:10px 0 6px}
.checker-status{min-height:28px;margin:8px 0 0;padding:7px 10px;border-left:3px solid var(--line);background:rgba(255,255,255,.025);font-size:14px}
.checker-status[data-state=pass]{border-color:var(--accent-2);color:var(--accent-2)}
.checker-status[data-state=warn]{border-color:var(--warn);color:var(--warn)}
.checker-status[data-state=fail]{border-color:#f87171;color:#fca5a5}
.checker-status[data-state=working]{border-color:var(--accent);color:var(--accent)}
.checker-progress{display:block;width:100%;height:10px;margin:10px 0 0;accent-color:var(--accent)}
.checker-progress[hidden]{display:none}
.checker-results{margin-top:18px;border-top:1px solid var(--line);padding-top:18px}
.checker-result-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.checker-result-head h2{font-size:20px;margin:8px 0 0;padding:0;border:0}
.checker-result-head>strong{font-size:15px;text-align:right;max-width:48%}
.checker-result-head>strong[data-state=pass]{color:var(--accent-2)}
.checker-result-head>strong[data-state=warn]{color:var(--warn)}
.checker-result-head>strong[data-state=fail]{color:#fca5a5}
.checker-badge{display:inline-block;border:1px solid var(--line);border-radius:999px;padding:2px 9px;font-size:12px;font-weight:700}
.checker-badge.pass{color:var(--accent-2);border-color:#2b4d33}
.checker-badge.warn{color:var(--warn);border-color:#5a4526}
.checker-badge.fail{color:#fca5a5;border-color:#60343b}
.checker-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:14px 0}
.checker-metrics>div{border:1px solid var(--line);border-radius:6px;background:var(--panel);padding:9px 10px;min-width:0}
.checker-metrics span{display:block;color:var(--muted);font-size:12px;line-height:1.4}
.checker-metrics strong{display:block;font-size:17px;line-height:1.35;margin-top:2px;overflow-wrap:anywhere}
.checker-checks{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:0;margin:12px 0}
.checker-checks li{display:flex;justify-content:space-between;gap:8px;border:1px solid var(--line);border-radius:6px;padding:7px 9px;font-size:13px;margin:0;min-width:0}
.checker-checks li span{overflow-wrap:anywhere}
.checker-checks strong{white-space:nowrap}
.checker-checks li[data-state=pass] strong{color:var(--accent-2)}
.checker-checks li[data-state=warn] strong{color:var(--warn)}
.checker-checks li[data-state=fail] strong{color:#fca5a5}
.checker-chart{margin:14px 0}
.checker-chart canvas{display:block;width:100%;height:230px;background:#0b0f17;border:1px solid var(--line);border-radius:6px}
.checker-chart figcaption{color:var(--muted);font-size:12.5px;margin-top:6px}
.checker-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.checker-results details{margin-top:12px;border:1px solid var(--line);border-radius:6px;padding:9px 11px}
.checker-results summary{cursor:pointer;font-weight:600}
.checker-results details table{margin:.7em 0 0;font-size:13px}
.checker-results details th{width:56%;color:var(--muted);font-weight:500}
.cite a{color:var(--accent);font-size:11.5px;padding:0 1px;text-decoration:none}
.refs{margin-top:34px;border-top:1px solid var(--line);padding-top:12px}
.refs ol{padding-left:1.4em}
.refs li{margin:10px 0;font-size:14px;line-height:1.65}
.grade{display:inline-block;font-size:11.5px;border-radius:4px;padding:1px 7px;margin-right:6px;
  border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.grade-A{color:#7ee787;border-color:#2b4d33}
.grade-B{color:#4cc2ff;border-color:#204a63}
.grade-C{color:#ffb86b;border-color:#5a4526}
.grade-D{color:#c9a2ff;border-color:#4a3a63}
.grade-E{color:#ffd479;border-color:#5c4a1f}
.related{margin:36px 0 8px;border-top:1px solid var(--line);padding-top:16px}
.related h2{margin-top:0;border-top:0;padding-top:0}
.related-list{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 24px;margin:10px 0 0;padding:0}
.related-list li{margin:0;padding:14px 0;border-bottom:1px solid var(--line)}
.related-list a{display:block;color:var(--text)}
.related-list a:hover{text-decoration:none}
.related-list a:hover strong{color:var(--accent);text-decoration:underline}
.related-list a:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:3px}
.related-list strong{display:block;line-height:1.45}
.related-list span{display:block;color:var(--muted);font-size:14px;line-height:1.55;margin-top:5px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}
.foot-grid a{display:block;color:var(--muted);margin:5px 0;font-size:14.5px}
.site-footer p a{text-decoration:underline;text-underline-offset:.16em}
.foot-title{color:var(--text);font-weight:600;margin-bottom:6px;font-size:14px}
@media (max-width:960px){
  .page{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .hero{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cards{grid-template-columns:1fr}
  .related-list{grid-template-columns:1fr;gap:0}
  .product-card{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .checker-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .checker-checks{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  .site-header .wrap{
    display:grid;
    grid-template-columns:auto minmax(0,1fr) auto;
    grid-template-areas:"brand . lang" "nav nav nav";
    align-items:center;
    height:auto;
    gap:8px 12px;
    padding:10px 14px;
  }
  .brand{grid-area:brand}
  .nav{
    grid-area:nav;
    display:flex;
    flex-wrap:nowrap;
    gap:18px;
    width:100%;
    overflow-x:auto;
    overscroll-behavior-inline:contain;
    scrollbar-width:none;
    padding:1px 0 3px;
    font-size:13px;
  }
  .nav::-webkit-scrollbar{display:none}
  .nav a{flex:0 0 auto;white-space:nowrap}
  .lang{grid-area:lang;justify-self:end;white-space:nowrap}
  .page{padding:20px 14px 40px;gap:20px}
  .content h1{font-size:26px;line-height:1.35}
  .content h2{font-size:20px}
  .figure-scroll a{width:920px}
  .figure-scroll img{max-width:none}
  .table-wrap[data-cols="1"] table,
  .table-wrap[data-cols="2"] table,
  .table-wrap[data-cols="3"] table{min-width:0;table-layout:fixed}
  .table-wrap[data-cols="4"] table,
  .table-wrap[data-cols="5"] table,
  .table-wrap[data-cols="6"] table{min-width:680px;table-layout:auto}
  .content th,.content td{padding:6px 7px;overflow-wrap:break-word;word-break:normal}
  .hero h1{font-size:27px}
  .stats{grid-template-columns:1fr 1fr}
  .product-card{padding:16px}
  .capture-checker{padding:12px}
  .checker-toolbar{align-items:stretch}
  .checker-file-button,.checker-secondary{flex:1 1 100%}
  .checker-result-head{display:block}
  .checker-result-head>strong{display:block;text-align:left;max-width:none;margin-top:8px}
  .checker-metrics{grid-template-columns:1fr 1fr}
  .checker-checks{grid-template-columns:1fr}
  .checker-chart canvas{height:230px}
  .guide-search-row{grid-template-columns:minmax(0,1fr) 44px}
  .guide-reset{width:44px;padding:0}
  .guide-reset span{display:none}
  .wrap{padding:0 14px}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
}