:root{color-scheme:light dark;--bg:#f0f3f0;--surface:#fafcfa;--ink:#16251e;--muted:#4d6257;--line:#c3d0c7;--accent:#235b3e;--accent-ink:#f8fbf8;--soft:#e2ebe5;--good:#176339;--good-bg:#e2f4e8;--bad:#a52b2b;--bad-bg:#fce9e6;--image-bg:#d5ded7;--radius:16px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#111816;--surface:#19231e;--ink:#eef4ef;--muted:#b0c2b6;--line:#42564a;--accent:#c8e589;--accent-ink:#132014;--soft:#26382d;--good:#b1e2bb;--good-bg:#183d29;--bad:#ffbab0;--bad-bg:#482521;--image-bg:#25382c}}
:root[data-theme=dark]{--bg:#111816;--surface:#19231e;--ink:#eef4ef;--muted:#b0c2b6;--line:#42564a;--accent:#c8e589;--accent-ink:#132014;--soft:#26382d;--good:#b1e2bb;--good-bg:#183d29;--bad:#ffbab0;--bad-bg:#482521;--image-bg:#25382c}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;border:1px solid var(--line);background:var(--surface);min-height:44px;border-radius:8px;padding:10px 16px}button:disabled{cursor:default}button:not(:disabled):hover{border-color:var(--accent);background:var(--soft)}button:not(:disabled):active{transform:translateY(1px)}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}.topbar{height:80px;max-width:1184px;padding:0 32px;margin:auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;font-size:17px;letter-spacing:1px}.brand-mark{font:700 26px ui-monospace,monospace;color:var(--accent)}.brand-cn{font-size:13px;font-weight:400;color:var(--muted);margin-left:12px}nav{display:flex;align-items:center;gap:12px}nav a{font-size:13px;text-decoration:none;margin-right:8px}nav button{background:transparent;min-width:44px;padding:8px 10px}.skip{position:absolute;top:-100px;left:10px;z-index:10;background:var(--surface);padding:12px}.skip:focus{top:10px}main{max-width:1184px;margin:0 auto;padding:42px 32px 48px;min-height:560px;outline:none}.eyebrow{font:12px ui-monospace,monospace;letter-spacing:1.6px;color:var(--muted);display:flex;align-items:center;gap:9px}.dot{width:7px;height:7px;border-radius:50%;background:var(--accent)}h1,h2,p{margin-top:0}h1{font-size:clamp(34px,4.8vw,58px);line-height:1.15;letter-spacing:-1.6px;margin:23px 0}h2{font-size:27px;line-height:1.4;margin-bottom:16px}.lede{font-size:17px;line-height:1.8;color:var(--muted);max-width:34em}.intro{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center}.intro-copy{padding:10px 0}.accent-text{color:var(--accent)}.mode-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:30px}.mode{padding:18px 20px;text-align:left;display:flex;flex-direction:column;gap:8px;min-height:106px}.mode strong{font-size:17px}.mode small{font-size:12px}.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:650}.primary:not(:disabled):hover{background:var(--accent);filter:brightness(.95)}.rules{font-size:12px;line-height:1.9;color:var(--muted);margin-top:19px}.photo-stack{position:relative;padding:22px 0 28px 26px}.preview{margin:0;position:relative;overflow:hidden;border-radius:var(--radius);background:var(--image-bg);border:1px solid var(--line)}.preview img{display:block;width:100%;height:350px;object-fit:cover;object-position:center 20%;filter:grayscale(1)}.preview figcaption{padding:16px 19px;display:flex;justify-content:space-between;gap:10px;font-size:13px}.preview figcaption span{font:12px ui-monospace,monospace;color:var(--muted)}.photo-stack:before{content:"";position:absolute;inset:9px 20px 12px 9px;border:1px solid var(--line);border-radius:var(--radius);transform:rotate(-4deg)}.photo-label{position:absolute;right:-14px;top:47px;background:var(--accent);color:var(--accent-ink);font:12px ui-monospace,monospace;padding:10px 14px;transform:rotate(5deg);border-radius:6px}.intro-note{margin-top:32px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:15px;font-size:12px;color:var(--muted)}.status{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:23px}.stats{display:flex;gap:26px;align-items:center}.stat{display:flex;flex-direction:column;gap:5px}.stat small{font-size:11px;color:var(--muted)}.stat strong{font:700 25px ui-monospace,monospace;font-variant-numeric:tabular-nums}.clock.urgent{color:var(--bad)}.progress{height:4px;flex:1;max-width:260px;background:var(--line);border-radius:2px;overflow:hidden}.progress span{display:block;height:100%;background:var(--accent)}.exit{padding:8px 12px;font-size:12px;background:transparent}.game-grid{display:grid;grid-template-columns:minmax(220px,.78fr) minmax(0,1.22fr);gap:38px}.portrait{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;align-self:start}.portrait img{display:block;width:100%;height:365px;object-fit:contain;background:var(--image-bg)}.portrait figcaption{padding:18px 20px}.portrait h2{font-size:21px;margin:0 0 7px}.portrait .year{font:12px ui-monospace,monospace;color:var(--muted)}.question-number{font:12px ui-monospace,monospace;color:var(--muted);margin:3px 0 14px}.question h2{font-size:24px;line-height:1.5;letter-spacing:-.4px}.options{display:grid;grid-template-columns:1fr;gap:10px}.option{text-align:left;display:flex;gap:13px;align-items:center;padding:13px 16px;min-height:58px;line-height:1.5}.option .key{display:inline-grid;place-items:center;flex:none;width:26px;height:26px;font:12px ui-monospace,monospace;border:1px solid var(--line);border-radius:5px;color:var(--muted)}.option.correct{border-color:var(--good);background:var(--good-bg);color:var(--good)}.option.wrong{border-color:var(--bad);background:var(--bad-bg);color:var(--bad)}.option .result-mark{margin-left:auto;flex:none;font-weight:800}.feedback{margin-top:18px;padding:18px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}.feedback.good{border-color:var(--good)}.feedback.bad{border-color:var(--bad)}.feedback h3{font-size:17px;margin:0 0 10px}.feedback.good h3{color:var(--good)}.feedback.bad h3{color:var(--bad)}.feedback p{font-size:14px;line-height:1.8;margin-bottom:10px}.source-links{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.next-row{display:flex;justify-content:flex-end;gap:12px;margin-top:20px}.keyboard-hint{font-size:11px;color:var(--muted)}.keyboard-hint{margin-top:15px}.prepare-bar{width:170px;height:4px;background:var(--line);border-radius:2px;overflow:hidden;margin:0 auto}.prepare-bar span{display:block;height:100%;background:var(--accent)}.summary{max-width:760px;margin:0 auto}.summary-top{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:30px;margin-bottom:28px;gap:20px}.total{font:700 76px ui-monospace,monospace;letter-spacing:-4px;color:var(--accent)}.summary h1{font-size:38px;margin:13px 0}.summary-stats{display:flex;gap:32px;margin:22px 0}.summary-actions{display:flex;gap:10px;flex-wrap:wrap}.review-list{margin-top:35px}.review-list>h2{font-size:20px}.review-item{padding:16px 0;border-top:1px solid var(--line)}.review-item summary{cursor:pointer;display:flex;align-items:center;gap:14px;min-height:54px;list-style:none}.review-item summary::-webkit-details-marker{display:none}.review-item img{width:44px;height:54px;object-fit:cover;border-radius:5px}.review-item .review-copy{flex:1}.review-item strong{font-size:14px}.review-item small{display:block;font-size:12px;line-height:1.6;margin-top:5px;color:var(--muted)}.review-item p{font-size:14px;line-height:1.8;margin:18px 0 12px}.review-item .good-label{color:var(--good)}.review-item .bad-label{color:var(--bad)}.result-score{font:12px ui-monospace,monospace;color:var(--muted)}footer{max-width:1120px;margin:auto;padding:22px 0 30px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:25px;color:var(--muted);font-size:11px;line-height:1.7}footer p{margin:0;max-width:52em}footer>div{display:flex;align-items:center;gap:20px;flex-shrink:0}footer button{font-size:11px;border:0;background:none;padding:0;min-height:24px;text-decoration:underline;text-underline-offset:4px}dialog{background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:var(--radius);padding:26px;max-width:800px;width:calc(100% - 32px);max-height:85dvh}dialog::backdrop{background:rgba(7,15,10,.72)}dialog header{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:18px}dialog h2{margin:0;font-size:21px}dialog header button{font-size:22px}dialog p{font-size:13px;line-height:1.8;color:var(--muted)}.source-entry{padding:19px 0;border-top:1px solid var(--line)}.source-entry h3{font-size:15px;margin:0 0 12px}.source-entry p{margin:9px 0;overflow-wrap:anywhere}.source-entry a{color:var(--ink)}.loading{text-align:center;padding:60px 20px}.loading h1{font-size:26px}.loading p{color:var(--muted)}.skeleton{width:170px;height:190px;background:var(--soft);border-radius:var(--radius);margin:0 auto}.error-panel{border:1px solid var(--bad);border-radius:var(--radius);padding:30px;max-width:650px;margin:40px auto}.error-panel h1{font-size:27px}.error-panel p{line-height:1.8;color:var(--muted)}.noscript{max-width:850px;margin:30px auto;padding:25px;line-height:1.8}.notice{background:var(--soft);border:1px solid var(--line);padding:20px;border-radius:12px;margin:0 0 24px}.notice p{font-size:14px;line-height:1.7}.notice button{margin-right:8px}
@media(prefers-reduced-motion:no-preference){.game-grid,.summary,.intro{animation:enter .28s ease-out}@keyframes enter{from{opacity:.3;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}button{transition:background .12s,border-color .12s,transform .1s}}
@media(max-width:900px){.intro{gap:30px}.intro h1{font-size:42px}.photo-stack{padding-left:10px}.preview img{height:310px}.mode{padding:15px}.game-grid{gap:24px}.portrait img{height:330px}footer{margin:0 32px}.progress{display:none}}
@media(max-width:640px){.topbar{height:66px;padding:0 18px}.brand-cn{display:none}nav{gap:5px}nav a{font-size:12px;margin-right:4px}main{padding:24px 18px 32px;min-height:500px}.intro{grid-template-columns:1fr;gap:20px}.intro-copy{padding:0}.intro h1{font-size:39px;margin:18px 0}.lede{font-size:15px;margin-bottom:12px}.mode-row{margin-top:20px}.mode{min-height:93px}.photo-stack{padding:8px 10px 10px;max-width:370px;justify-self:center;width:100%}.preview img{height:205px;object-position:center 28%}.photo-label{right:0;top:24px}.intro-note{margin-top:26px;flex-direction:column;gap:7px;line-height:1.7}.game-grid{grid-template-columns:1fr;gap:22px}.portrait{display:grid;grid-template-columns:120px 1fr;align-items:center}.portrait img{height:154px;width:120px}.portrait figcaption{padding:16px}.portrait h2{font-size:19px}.status{gap:12px;margin-bottom:18px}.stats{gap:22px}.stat strong{font-size:22px}.stat small{font-size:10px}.question-number{margin:0 0 10px}.question h2{font-size:21px;margin-bottom:14px}.options{gap:8px}.option{min-height:55px;padding:12px;font-size:14px}.keyboard-hint{display:none}.prepare-bar{width:140px}.feedback{padding:16px}.summary-top{flex-direction:column;align-items:flex-start;padding-bottom:25px;gap:15px}.summary h1{font-size:32px}.total{font-size:66px}.summary-stats{gap:24px}.review-item summary{gap:10px}.result-score{font-size:11px}footer{margin:0 18px;flex-direction:column;gap:10px}footer>div{justify-content:space-between}dialog{padding:20px}.loading{padding:40px 0}.portrait:not(.revealed){display:block}.portrait:not(.revealed) img{width:100%;height:min(45dvh,380px)}}