:root{--foreground:#192c35;--muted:#60757d;--accent:#086d65;--line:#dbe5e4;--background:#f5f7f6;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--background);color:var(--foreground);font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;line-height:1.7}a{color:var(--accent)}nav{background:#fff;border-bottom:1px solid var(--line);padding:15px max(24px,calc((100vw - 1120px)/2));display:flex;justify-content:space-between;gap:20px}nav a{text-decoration:none;font-weight:600}main{max-width:1120px;margin:auto;padding:54px 24px}h1{font-size:clamp(30px,5vw,48px);letter-spacing:-1px;line-height:1.2;margin:16px 0 22px}h2{font-size:27px;margin:0 0 12px}h3{font-size:22px;margin:6px 0}.eyebrow{color:var(--accent);font-size:12px;font-weight:700;letter-spacing:2px}.lead{max-width:780px;font-size:17px;color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:30px 0}.stat{border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff}.stat strong{display:block;font-size:30px}.stat span,.meta{font-size:13px;color:var(--muted)}.notice{border-left:3px solid #bc8b35;background:#fff7e9;padding:16px 20px;border-radius:0 10px 10px 0}.section{margin-top:52px;scroll-margin-top:24px}.case{background:white;border:1px solid var(--line);border-radius:18px;padding:26px;margin:22px 0;overflow:hidden}.case p{overflow-wrap:anywhere}.case img{width:100%;height:auto;border:1px solid var(--line);border-radius:8px}.case blockquote{margin:16px 0;padding:12px 18px;background:#f1f6f5;border-left:3px solid var(--accent);font-size:16px}.video-panel{margin-top:16px}.video-panel summary{cursor:pointer;font-weight:600;color:var(--accent)}video{display:block;max-height:600px;max-width:100%;margin:16px auto 0;background:#10202a;border-radius:8px}.explorer{background:white;padding:26px;border:1px solid var(--line);border-radius:18px}.viz-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.form-label{font-size:13px;font-weight:600}.form-control,.form-select{display:block;width:100%;margin-top:6px;padding:11px;border:1px solid #bfd0cf;border-radius:8px;font:inherit;background:white;color:var(--foreground)}.viz-row{display:flex;align-items:center;gap:18px}.btn{padding:9px 16px;border:1px solid #bfd0cf;background:white;border-radius:8px;cursor:pointer;font:inherit}.btn:disabled{opacity:.4;cursor:default}summary{cursor:pointer}#review-results summary{font-weight:600;line-height:1.8}hr{border:0;border-top:1px solid var(--line)}.review-check{padding:12px 16px;background:#f5f8f7;border-radius:8px}.text-small{font-size:13px;color:var(--muted)}footer{margin-top:40px;color:var(--muted);font-size:13px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #58b6ac;outline-offset:4px}@media(max-width:600px){main{padding:30px 16px}.stats{grid-template-columns:repeat(2,1fr)}.case,.explorer{padding:16px}.viz-controls{grid-template-columns:1fr}nav{padding:12px 16px;font-size:13px}.stat strong{font-size:25px}}