:root{--bg: #05070b;--bg2: #0a0f17;--line: #1c2633;--fg: #d7e3ee;--muted: #7d8da0;--accent: #4dff9a;--mono: "Cascadia Mono", "Cascadia Code", Consolas, "SFMono-Regular", Menlo, "DejaVu Sans Mono", monospace, "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--fg)}body{font:14px/1.6 var(--mono);-webkit-font-smoothing:antialiased;min-height:100vh}a{color:var(--accent)}button,select,input{font:inherit;color:inherit}.btn{border:1px solid color-mix(in srgb,var(--accent) 55%,transparent);background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--fg);padding:6px 12px;border-radius:6px;cursor:pointer;white-space:nowrap}.btn:hover{background:color-mix(in srgb,var(--accent) 24%,transparent)}.btn.primary{background:var(--accent);color:#041016;font-weight:700;border-color:var(--accent)}.btn.primary:hover{filter:brightness(1.1)}.btn.ghost{background:transparent;border-color:var(--line);color:var(--muted)}.btn.ghost:hover{color:var(--fg);border-color:var(--muted)}.btn:focus-visible,.seg:focus-visible,.tab:focus-visible,.card:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.home{max-width:1240px;margin:0 auto;padding:40px 20px 60px}.hero{padding:8px 0 28px}.kicker{color:var(--muted);margin:0 0 8px;font-size:13px}.hero h1{font-size:clamp(30px,5.4vw,58px);line-height:1.05;margin:0 0 14px;letter-spacing:-.02em;font-weight:800}.h-ascii{color:var(--accent);text-shadow:0 0 18px color-mix(in srgb,var(--accent) 55%,transparent)}.sub{max-width:760px;color:#b6c4d2;margin:0 0 18px;font-size:15px}.hero-tools{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.hint{color:var(--muted);font-size:12px}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,360px),1fr));gap:18px}.card{display:flex;flex-direction:column;text-decoration:none;color:var(--fg);background:var(--bg2);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:border-color .2s,transform .2s}.card:hover{border-color:var(--accent);transform:translateY(-2px)}.card-stage{position:relative;aspect-ratio:16 / 9;background:#000;border-bottom:1px solid var(--line)}.card-meta{padding:14px 16px 16px;display:flex;flex-direction:column;gap:4px;flex:1}.card-top{display:flex;justify-content:space-between;align-items:baseline}.card .num{color:var(--accent);font-weight:700}.card .en{color:var(--muted);font-size:12px}.card h2{margin:2px 0 0;font-size:20px}.card .tagline{margin:0;color:#c2cfdb}.card .how{margin:4px 0 0;color:var(--muted);font-size:12px}.card .go{margin-top:auto;padding-top:8px;color:var(--accent);font-weight:700;font-size:13px}.foot{margin-top:40px;color:var(--muted);font-size:12px;border-top:1px solid var(--line);padding-top:16px}.foot p{margin:4px 0}.foot strong{color:var(--fg)}.shell{height:100vh;height:100dvh;display:grid;grid-template-rows:auto 1fr;overflow:hidden}.topbar{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--line);background:#070a10;min-width:0}.back{text-decoration:none;color:var(--fg);white-space:nowrap;padding:4px 8px;border-radius:6px}.back:hover{background:#121a25}.tabs{display:flex;gap:4px;flex:1;min-width:0;overflow-x:auto;scrollbar-width:none}.tab{white-space:nowrap;text-decoration:none;color:var(--muted);padding:4px 10px;border-radius:6px;border:1px solid transparent;font-size:13px}.tab .n{color:var(--accent);margin-right:6px;opacity:.8}.tab:hover{color:var(--fg);background:#101722}.tab.on{color:var(--fg);border-color:color-mix(in srgb,var(--accent) 60%,transparent);background:color-mix(in srgb,var(--accent) 10%,transparent)}.tab-select{display:none;background:#0d131c;border:1px solid var(--line);border-radius:6px;padding:4px 6px;min-width:0;flex:1}.tools{display:flex;gap:8px;align-items:center;margin-left:auto}.fps{color:var(--accent);font-size:12px;min-width:64px;text-align:right;font-variant-numeric:tabular-nums}.stage-host{position:relative;min-height:0}.demo{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden}.demo canvas.stage{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block;touch-action:none;cursor:crosshair}.demo.preview canvas.stage{pointer-events:none;touch-action:auto}.panel{position:absolute;top:12px;right:12px;width:280px;max-height:calc(100% - 24px);display:flex;flex-direction:column;background:#070b11db;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:10px;z-index:5}.panel-head{display:flex;justify-content:space-between;align-items:center;background:none;border:0;padding:10px 14px;cursor:pointer;color:var(--accent);font-weight:700}.panel .chev{transition:transform .2s}.panel.collapsed .chev{transform:rotate(-90deg)}.panel.collapsed .panel-body{display:none}.panel-body{padding:0 14px 14px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.ctl{display:flex;flex-direction:column;gap:4px;font-size:13px}.ctl-head{display:flex;justify-content:space-between;color:#b9c7d5}.ctl-head output{color:var(--accent);font-variant-numeric:tabular-nums}.ctl input[type=range]{width:100%;accent-color:var(--accent);margin:0;height:22px}.ctl-toggle{flex-direction:row;align-items:center;gap:8px;cursor:pointer;color:#b9c7d5}.ctl-toggle input{accent-color:var(--accent);width:16px;height:16px;margin:0}.seg-row{display:flex;flex-wrap:wrap;gap:4px}.seg{flex:1 1 auto;border:1px solid var(--line);background:#0c121a;color:var(--muted);padding:5px 8px;border-radius:6px;cursor:pointer;font-size:12px}.seg:hover{color:var(--fg)}.seg.on{border-color:var(--accent);color:var(--fg);background:color-mix(in srgb,var(--accent) 16%,transparent)}.btn-row{display:flex;gap:6px;flex-wrap:wrap}.btn-row .btn{flex:1}.ctl-note{margin:0;font-size:12px;color:#9fb0c2;line-height:1.55}.ctl-note.muted{color:var(--muted)}.ctl-note.warn{color:#ffcf7a;border-left:2px solid #ffcf7a;padding-left:8px}.ctl-group-title{margin:4px 0 -4px;font-size:11px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}.info-card{position:absolute;left:12px;top:12px;width:min(360px,calc(100% - 24px));max-height:calc(100% - 24px);overflow-y:auto;background:#060a10eb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid color-mix(in srgb,var(--accent) 70%,transparent);border-radius:10px;padding:14px 16px;z-index:6;box-shadow:0 0 30px color-mix(in srgb,var(--accent) 18%,transparent)}.info-card.hidden{display:none}.info-close{position:absolute;right:8px;top:6px;background:none;border:0;color:var(--muted);font-size:20px;cursor:pointer;line-height:1;padding:4px 8px}.info-close:hover{color:var(--fg)}.info-body h3{margin:0 24px 6px 0;color:var(--accent);font-size:18px}.info-body h3 small{color:var(--muted);font-weight:400;font-size:13px;margin-left:6px}.info-body p{margin:6px 0;font-size:13px;color:#c9d5e1}.info-body .formula{color:var(--fg);font-size:14px}.info-body .src{color:var(--muted);font-size:12px}.info-body .chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}.info-body .chip{border:1px solid color-mix(in srgb,var(--accent) 50%,transparent);color:var(--accent);border-radius:999px;padding:1px 9px;font-size:12px}.info-body ul{margin:6px 0;padding-left:18px;font-size:13px;color:#c9d5e1}.info-body .link-btn{background:none;border:0;color:var(--accent);cursor:pointer;padding:0;text-decoration:underline}@media (max-width: 860px){.tabs{display:none}.tab-select{display:block}.tools .motion-btn{display:none}}@media (max-width: 720px){.home{padding:24px 16px 40px}.topbar{gap:6px;padding:6px 8px}.fps{min-width:0}.panel{top:auto;bottom:0;right:0;left:0;width:auto;max-height:52%;border-radius:12px 12px 0 0;border-bottom:0}.info-card{top:8px;left:8px;width:calc(100% - 16px);max-height:44%}}@media (prefers-reduced-motion: reduce){.card{transition:none}}