:root{color-scheme:dark;--bg:#11151c;--panel:#1a202b;--line:#303949;--text:#edf2fa;--muted:#a5b1c3;--blue:#86b5ff;--accent:#347ef0;font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 50% 0,#1c2b42 0,transparent 55%),var(--bg);color:var(--text);min-height:100vh;line-height:1.65}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button,a.button{font:inherit}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:44px;border:1px solid var(--line);border-radius:10px;padding:10px 17px;background:#232d3c;color:var(--text);cursor:pointer;text-decoration:none}button:hover,.button:hover{background:#2b394d;text-decoration:none}.primary{background:var(--accent)!important;border-color:var(--accent)!important;color:white!important}.primary:hover{background:#2268d6!important}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}.shell{max-width:1080px;margin:auto;padding:28px 24px 36px}.brand{display:flex;align-items:center;gap:12px;font-size:15px;font-weight:650;letter-spacing:.03em}.mark{display:inline-grid;place-items:center;width:35px;height:35px;border:1px solid #42669b;background:#233654;border-radius:10px;color:#a7cbff;font-size:19px}.brand a{color:var(--text)}.topbar{display:flex;justify-content:space-between;align-items:center;gap:15px;padding-bottom:26px}.tag{font-size:12px;color:#b5d0fb;border:1px solid #3c5275;background:#203049;border-radius:99px;padding:4px 11px;white-space:nowrap}.intro{margin:20px 0 26px}h1{font-size:clamp(24px,4.5vw,36px);line-height:1.4;letter-spacing:-.02em;overflow-wrap:anywhere;margin:0 0 12px}.muted{color:var(--muted)}p{margin:0 0 14px}.player-panel{border:1px solid var(--line);background:#080a0e;border-radius:15px;overflow:hidden;box-shadow:0 18px 60px #0003}.video-wrap{position:relative;display:grid;place-items:center;background:#06080c}video{display:block;width:100%;height:auto;max-height:72vh;min-height:220px;aspect-ratio:16/9;object-fit:contain;background:#06080c}.player-help{padding:13px 18px;color:var(--muted);font-size:13px;border-top:1px solid #252c38;display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap}.dot{display:inline-block;width:7px;height:7px;background:#6faaed;border-radius:50%;margin-right:8px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}.info{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;margin-top:24px}.info h2{font-size:16px;margin:0 0 16px}.facts{display:grid;grid-template-columns:1fr 1fr;gap:18px 28px;margin:0}.facts>div{min-width:0}.facts dt{font-size:12px;color:var(--muted);margin-bottom:5px}.facts dd{margin:0;font-size:14px;overflow-wrap:anywhere}.wide{grid-column:1/-1}.hash{font-family:ui-monospace,Consolas,monospace;font-size:12px!important;letter-spacing:.02em}.foot{font-size:12px;color:#8995a8;padding-top:26px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.landing{max-width:810px;margin:60px auto 45px;text-align:center}.eyebrow{font-size:12px;color:var(--blue);letter-spacing:.14em;margin-bottom:16px}.landing h1{font-size:clamp(30px,6vw,48px)}.landing .lead{max-width:550px;margin:0 auto;color:var(--muted);font-size:16px}.empty{margin-top:34px;border:1px solid var(--line);border-radius:18px;background:#1a202bd9;padding:38px 24px}.empty-icon{display:grid;place-items:center;margin:0 auto 18px;width:74px;height:74px;border:1px solid #3b5275;background:#22334c;border-radius:22px;color:#a5c8ff}.empty h2{font-size:19px;margin:0 0 10px}.empty p{font-size:14px;color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:30px 0 0;text-align:left}.step{border-top:1px solid #384457;padding-top:17px}.step b{display:block;font-size:14px;margin:7px 0}.step span{font-size:12px;color:var(--muted)}.step .num{font-size:11px;color:var(--blue);font-weight:700;letter-spacing:.12em}.notice{display:none;border:1px solid #796236;background:#30291d;color:#f0d6a4;border-radius:10px;padding:12px 15px;margin:16px 0;font-size:14px}.notice.show{display:block}#copy-status{font-size:13px;color:var(--blue);min-height:24px}#share-fallback{width:100%;padding:12px;border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:8px;font:inherit;font-size:13px;margin-top:8px}button[hidden],input[hidden]{display:none!important}@media(max-width:600px){.shell{padding:20px 16px 28px}.topbar{padding-bottom:20px}.brand{font-size:13px}.tag{font-size:10px}.info{padding:18px}.facts{grid-template-columns:1fr}.wide{grid-column:auto}.landing{margin:34px auto}.empty{padding:28px 18px}.steps{grid-template-columns:1fr;gap:18px}.step{padding-top:12px}video{min-height:180px;max-height:65vh}.actions>*{flex:1}.foot{display:block}.foot span{display:block;margin-bottom:6px}}@media(prefers-reduced-motion:no-preference){button,.button{transition:background .15s ease}}