:root{--brand: #2570a6;--brand-ink: #174e76;--brand-bg: #edf2f6;--pd-blue: #2b99ff;--ink: #0a0a0a;--mute: #5b6b7a;--line: #cfdae4;--sans: "Noto Sans TC", "PingFang TC", system-ui, sans-serif}*{box-sizing:border-box;margin:0}body{background:var(--brand-bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}#page{max-width:640px;margin:0 auto}.header{position:sticky;top:0;z-index:5;height:calc(56px + env(safe-area-inset-top));padding:env(safe-area-inset-top) 16px 0;background:color-mix(in srgb,var(--brand-bg) 92%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px}.back{flex:none;width:34px;height:34px;margin-left:-8px;border-radius:50%;display:grid;place-items:center;color:var(--brand-ink)}.back:active{background:#174e7614}.back svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}.hd-game{margin-left:auto}.hd-brand{display:inline-flex;align-items:center;gap:8px;font-family:Fredoka,sans-serif;font-weight:600;font-size:15px;letter-spacing:1.5px;color:var(--brand);text-decoration:none}.hd-brand svg{width:18px;height:18px}.hd-game{font-family:Bebas Neue,system-ui,sans-serif;font-size:26px;font-weight:400;line-height:1;letter-spacing:1px;padding-top:2px;color:var(--ink);text-decoration:none}.langs{display:flex;flex-wrap:wrap;gap:4px 12px;margin:10px 16px 0;font-size:12px}.langs a{color:var(--brand);text-decoration:none}.langs span{color:var(--ink);font-weight:700}.doc{padding:20px 16px 32px;line-height:1.75}h1{font-size:28px;line-height:1.3;color:var(--brand-ink);margin-bottom:10px}.lead{color:var(--mute);font-size:15px}.toc{display:flex;flex-wrap:wrap;gap:6px;margin:18px 0 8px}.toc a{font-size:12px;text-decoration:none;color:var(--brand-ink);background:#fff;border:1px solid var(--line);border-radius:999px;padding:3px 10px}section{margin-top:34px;scroll-margin-top:calc(72px + env(safe-area-inset-top))}h2{font-size:20px;line-height:1.4;margin-bottom:10px}section p,section li{font-size:15px}ul{padding-left:1.2em;display:grid;gap:4px}strong{color:var(--brand-ink)}.fig{height:292px;margin:0 0 12px;border-radius:18px;background:radial-gradient(circle at 50% 40%,#fff,#e3ebf3);display:flex;flex-direction:column;overflow:hidden}.fig figcaption{padding:4px 12px 8px;text-align:center;font-size:12px;line-height:1.5;color:var(--mute)}.fig-cv{display:block;flex:1 1 0;min-height:0;width:100%;pointer-events:none}.calc{background:#fff;border-radius:16px;padding:14px 16px;display:grid;gap:4px;margin-bottom:10px;font-size:15px}.calc b{font-size:20px}.calc .eq{border-top:1px dashed var(--line);padding-top:6px;margin-top:4px;font-weight:600}.chip{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:8px}.chip.blue{background:#2b99ff}.chip.green{background:#2fcb7a}details{background:#fff;border-radius:12px;padding:10px 14px;margin-bottom:8px}summary{font-weight:600;cursor:pointer;font-size:15px}details p{margin-top:6px;color:var(--mute)}.buy{margin-top:36px;background:#fff;border-radius:16px;padding:14px 16px;font-size:15px}.buy a{color:var(--brand);font-weight:700}.buy+.buy,.buy+.cta{margin-top:14px}.cta{display:block;margin:36px 0 18px;text-align:center;background:var(--pd-blue);color:#fff;font-weight:700;text-decoration:none;border-radius:999px;padding:14px}.source{font-size:12px;color:var(--mute)}.source a{color:var(--brand)}footer.brand-bar{margin:0 16px;border-top:1px solid var(--line);height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:flex;align-items:center;justify-content:center}.brand{display:inline-flex;align-items:center;gap:6px;font-family:Fredoka,sans-serif;font-weight:600;font-size:11px;letter-spacing:1.5px;color:var(--brand)}a.brand{text-decoration:none}.brand svg{width:13px;height:13px}