:root{color-scheme:dark;--bg:#0c1528;--panel:#14223b;--line:#2b3c55;--text:#f2f6fc;--muted:#a6b7cf;--mint:#9be7ce}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 15% 0,#1a3049 0,transparent 50%),var(--bg);color:var(--text);font-family:"Microsoft JhengHei","PingFang TC",system-ui,sans-serif}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #f8d68c;outline-offset:5px}button:disabled{opacity:.35;cursor:default}.shell{max-width:1440px;margin:auto;padding:28px 44px}.masthead{display:flex;justify-content:space-between;align-items:center;padding-bottom:22px;border-bottom:1px solid var(--line)}.brand{color:var(--text);font-weight:700;letter-spacing:1px;text-decoration:none}.brand-icon{display:inline-grid;place-items:center;background:var(--mint);color:#102a32;width:34px;height:34px;border-radius:11px;margin-right:8px;font-size:25px}.edition{color:var(--muted);font-size:13px;letter-spacing:2px}.heading{display:flex;justify-content:space-between;align-items:center;margin:30px 0}.eyebrow{font-size:12px;color:var(--mint);letter-spacing:2px;font-weight:700;margin:0 0 12px}h1{font-size:64px;line-height:1.1;letter-spacing:6px;margin:0 0 14px}h1>span:first-child{color:var(--mint)}.title-dot{color:#f4cf8d}.subtitle{color:var(--text);font-size:17px;margin:0}.subtitle span{color:var(--muted);font-size:14px;margin-left:10px}.heading-note{color:var(--muted);font-size:15px;line-height:1.9;position:relative;padding-right:45px}.heading-note span{position:absolute;right:0;top:0;color:#f4cf8d;font-size:36px}.layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:24px;align-items:start}.game-card{border:1px solid var(--line);border-radius:22px;overflow:hidden;background:#101e35;box-shadow:0 20px 70px #0002}.toolbar{display:flex;align-items:center;justify-content:space-between;padding:22px 26px;border-bottom:1px solid var(--line)}.stats{display:flex;gap:38px}.stats>div{display:flex;flex-direction:column;gap:5px}.label{font-size:12px;color:var(--muted)}.stats strong{font-size:27px;font-variant-numeric:tabular-nums;line-height:1.3}.stats .hearts{font-size:22px;color:#ff9da9;letter-spacing:4px}.tools{display:flex;gap:8px}.icon-btn{background:#21314b;border:1px solid #35465e;color:#d5e7f4;border-radius:11px;width:40px;height:40px;font-weight:700;font-size:21px}.question-box{min-height:121px;padding:20px 26px;background:#182840}.question-box .eyebrow{font-size:11px;display:block;margin-bottom:9px}h2{font-size:24px;line-height:1.45;margin:0}.question-box h2{font-size:clamp(20px,2vw,28px)}.arena{position:relative;aspect-ratio:16/10;background:#102038;overflow:hidden;touch-action:none}canvas{display:block;width:100%;height:100%;touch-action:none}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#102038ba;backdrop-filter:blur(6px);padding:20px}.overlay[hidden]{display:none}.panel{text-align:center;width:100%;max-width:490px;max-height:100%;overflow:auto;padding:6px}.panel .symbol{font-size:44px;color:var(--mint);margin-bottom:12px}.panel h2{font-size:clamp(26px,3vw,36px);margin-bottom:12px}.panel p{color:#bdcce0;font-size:16px;line-height:1.8;margin:8px 0}.primary{display:inline-block;background:var(--mint);color:#102e33;border:0;border-radius:12px;font-size:19px;font-weight:800;padding:15px 35px;margin:20px 0 8px;box-shadow:0 6px 24px #91eac91a}.primary:hover{background:#b9f5de;transform:translateY(-1px)}.panel .hint{font-size:12px;color:var(--muted)}.panel 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0}.tip{border-top:1px solid var(--line);padding-top:17px;color:#f4cf8d;font-size:12px;line-height:1.8}.join{margin-top:20px;display:flex;flex-wrap:wrap;gap:18px;align-items:center;padding:23px}.join h2{font-size:22px}.join p:not(.eyebrow){font-size:12px;color:var(--muted);line-height:1.8}.join a{color:var(--mint);font-size:12px}.qr-box{width:132px;height:132px;border-radius:10px;background:#fff;display:grid;place-items:center;overflow:hidden}.qr-box img{display:block;width:132px;height:132px}.qr-box img[hidden]{display:none}.qr-placeholder{text-align:center;color:#34465a;font-size:60px;line-height:1}.qr-placeholder small{display:block;font-size:11px;margin-top:6px}.privacy{color:var(--muted);font-size:12px;line-height:1.9;text-align:center;margin:18px 0}.page-footer{display:flex;justify-content:space-between;color:#8194b2;font-size:12px;border-top:1px solid var(--line);padding-top:20px;margin-top:32px}.feedback{position:absolute;left:50%;top:38%;transform:translateX(-50%);color:var(--mint);font-size:28px;font-weight:bold;pointer-events:none;text-shadow:0 3px 15px #000;white-space:nowrap}.shake{animation:shake .25s}@keyframes shake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}@media(min-width:1500px){.question-box h2{font-size:30px}}@media(max-width:1000px){.shell{padding:24px}.layout{grid-template-columns:minmax(0,1fr) 260px;gap:18px}.stats{gap:23px}.toolbar{padding:18px}.side-card{padding:20px}.heading-note{display:none}}@media(max-width:760px){.shell{padding:18px 14px}.edition{font-size:10px;letter-spacing:0}.brand{font-size:13px}.brand-icon{width:28px;height:28px;font-size:21px}.heading{margin:24px 4px}.heading h1{font-size:50px}.subtitle{font-size:15px}.subtitle span{display:block;margin:8px 0 0;font-size:12px}.layout{grid-template-columns:1fr}.toolbar{padding:15px}.stats{gap:25px}.stats strong{font-size:24px}.stats .hearts{font-size:19px;letter-spacing:1px}.tools{gap:6px}.icon-btn{width:34px;height:36px}.question-box{padding:18px;min-height:125px}.arena{aspect-ratio:3/4}.question-box h2{font-size:23px}.game-footer{padding:13px 15px;font-size:11px}.desktop-only{display:none}aside{display:grid;grid-template-columns:1fr;gap:16px}.join{margin:0;justify-content:space-between}.privacy{margin:0}.page-footer{gap:14px;font-size:10px}.panel h2{font-size:29px}.panel p{font-size:15px}.panel .symbol{font-size:40px}.overlay{padding:16px}.how ol{margin-bottom:16px}.how li:last-child{margin-bottom:0}}@media(prefers-reduced-motion:reduce){.shake{animation:none}.primary:hover{transform:none}}