:root{--bg: #f5f7f8;--surface: #ffffff;--surface-sunken: #eef1f3;--ink: #101820;--ink-muted: #4c5a66;--ink-faint: #8494a0;--line: #dce2e6;--line-strong: #c2cbd1;--accent: #0e7c86;--accent-strong: #0a5d65;--accent-tint: #e3f1f1;--good: #1f7a4d;--good-tint: #e5f3ec;--warn: #a9660b;--warn-tint: #fbf0dd;--danger: #b3261e;--danger-tint: #fbe7e5;--radius: 10px;--shadow: 0 1px 2px rgba(16, 24, 32, .04), 0 4px 16px rgba(16, 24, 32, .06)}@media (prefers-color-scheme: dark){:root{--bg: #0c1116;--surface: #141b22;--surface-sunken: #0f151b;--ink: #e7edf1;--ink-muted: #a7b4be;--ink-faint: #71818c;--line: #263038;--line-strong: #34404a;--accent: #3fc2c4;--accent-strong: #6ed8d9;--accent-tint: #123234;--good: #4cb37f;--good-tint: #12291f;--warn: #d79a45;--warn-tint: #2e2415;--danger: #e2685f;--danger-tint: #341c1a;--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:IBM Plex Sans,Noto Sans TC,PingFang TC,Microsoft JhengHei,system-ui,sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}.shell{max-width:620px;margin:0 auto;padding:48px 20px 80px}.brand{font-size:12.5px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}h1{font-size:26px;font-weight:700;letter-spacing:-.01em;margin:0 0 8px;text-wrap:balance}.lede{color:var(--ink-muted);margin:0 0 32px;font-size:15.5px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:20px}.card h2{font-size:17px;font-weight:600;margin:0 0 6px}.card p{margin:0 0 14px;color:var(--ink-muted);font-size:14.5px}.card p:last-child{margin-bottom:0}.steps{display:flex;gap:6px;margin-bottom:28px;list-style:none;padding:0}.steps li{flex:1;font-size:11.5px;font-weight:600;letter-spacing:.04em;color:var(--ink-faint);padding-top:8px;border-top:3px solid var(--line);transition:color .2s,border-color .2s}.steps li[data-state=active]{color:var(--accent-strong);border-top-color:var(--accent)}.steps li[data-state=done]{color:var(--ink-muted);border-top-color:var(--good)}.notice{border-radius:var(--radius);padding:14px 16px;font-size:14px;margin-bottom:20px;border:1px solid transparent}.notice[data-tone=good]{background:var(--good-tint);border-color:var(--good);color:var(--good)}.notice[data-tone=warn]{background:var(--warn-tint);border-color:var(--warn);color:var(--warn)}.notice[data-tone=danger]{background:var(--danger-tint);border-color:var(--danger);color:var(--danger)}.notice[data-tone=info]{background:var(--accent-tint);border-color:var(--accent);color:var(--accent-strong)}.notice strong{display:block;margin-bottom:2px}.btn{font:inherit;font-weight:600;font-size:14.5px;border-radius:8px;padding:10px 20px;border:1px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,opacity .15s}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn[data-variant=primary]{background:var(--accent);color:#fff}.btn[data-variant=primary]:hover:not(:disabled){background:var(--accent-strong)}.btn[data-variant=ghost]{background:transparent;color:var(--ink-muted);border-color:var(--line-strong)}.btn[data-variant=ghost]:hover:not(:disabled){color:var(--ink);border-color:var(--ink-faint)}.btn[data-variant=danger]{background:var(--danger);color:#fff}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.demo-card{background:var(--warn-tint);border:2px dashed var(--warn);border-radius:var(--radius);padding:22px 24px;margin-bottom:20px}.demo-card h2{font-size:17px;font-weight:600;margin:0 0 8px;color:var(--warn)}.demo-card p{font-size:14px;color:var(--ink-muted);margin:0 0 10px}.demo-tag{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;background:var(--warn);color:#fff;border-radius:4px;padding:3px 10px;margin-bottom:10px}.btn[data-variant=demo]{background:var(--warn);color:#fff}.btn[data-variant=demo]:hover:not(:disabled){filter:brightness(.92)}.device-list{list-style:none;padding:0;margin:0 0 18px;display:flex;flex-direction:column;gap:8px}.device{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line);border-radius:8px;background:var(--surface-sunken);cursor:pointer;transition:border-color .15s,background .15s}.device:hover{border-color:var(--line-strong)}.device:has(input:checked){border-color:var(--danger);background:var(--danger-tint)}.device input{margin-top:4px;accent-color:var(--danger);flex:none}.device-name{font-weight:600;font-size:14.5px}.device-meta{font-size:12.5px;color:var(--ink-faint);font-family:IBM Plex Mono,monospace}.retained{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}.retained li{font-size:12.5px;background:var(--good-tint);color:var(--good);border:1px solid 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