:root{--ink:#173a2b;--deep:#347047;--bg:#f6fbf4;--line:#d6e9d5;--muted:#688577}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;overflow-x:hidden;background:var(--bg);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",sans-serif}button,textarea,input{font:inherit}button{cursor:pointer}
.top{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 max(16px,7vw);position:sticky;top:0;z-index:6;background:#fffffff0;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.brand{font-size:18px;font-weight:900}.brand i{font-style:normal;display:inline-grid;place-items:center;width:26px;height:26px;margin-right:7px;border-radius:50%;background:#bfe576;color:#fff;font-size:12px}.term{padding:7px 11px;border:1px solid var(--line);border-radius:99px;background:#fff;color:var(--muted);font-size:12px}
main{max-width:980px;margin:auto;padding:42px 18px 165px}.hero{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:end;padding:30px;border:1px solid var(--line);border-radius:26px;background:linear-gradient(125deg,#fff 14%,#e6f5e2)}.eyebrow{color:var(--deep);font:800 11px Consolas,monospace;letter-spacing:.8px}.hero h1{margin:11px 0 13px;font-size:clamp(31px,5vw,48px);line-height:1.12;letter-spacing:-2px}.hero h1 em{font-style:normal;background:linear-gradient(transparent 64%,#d6efaa 0)}.hero p{max-width:670px;margin:0;color:#587566;font-size:14px;line-height:1.8}.score{min-width:126px;padding:14px 16px;border:1px solid #d6e8d2;border-radius:16px;background:#ffffffc9;text-align:center}.score b{display:block;font-size:26px}.score span{color:var(--muted);font-size:11px}
.progress{margin:16px 0 20px;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:#fff}.progress-head{display:flex;justify-content:space-between;gap:12px;margin-bottom:8px;color:var(--muted);font-size:12px}.progress-head b{color:var(--deep)}.track{height:7px;overflow:hidden;border-radius:99px;background:#e8f1e6}.track i{display:block;width:0;height:100%;border-radius:99px;background:linear-gradient(90deg,#a7dc9d,#63ad71);transition:width .35s ease}
.question-card{min-width:0;padding:25px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:0 12px 36px #50795a0c}.question-card.done{border-color:#9ecf98}.q-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.q-index{display:flex;align-items:center;gap:9px}.num{display:grid;place-items:center;width:34px;height:34px;flex:none;border-radius:10px;background:#eaf7e7;color:var(--deep);font:900 13px Consolas,monospace}.kind{padding:5px 9px;border-radius:99px;background:#f4f8f3;color:#63806e;font-size:11px;font-weight:800}.question-text{min-width:0;color:#183a2b;font-size:17px;font-weight:700;line-height:1.9;overflow-wrap:anywhere}.question-text .options{display:grid;gap:8px;margin-top:13px;font-weight:500}.question-text .option{padding:9px 12px;border:1px solid #e0ece0;border-radius:10px;background:#fbfefa}.answer-zone{margin-top:21px;padding-top:18px;border-top:1px dashed #dbe9d9}.answer-label{display:block;margin-bottom:8px;color:#456754;font-size:13px;font-weight:800}.draft{display:block;width:100%;min-height:108px;padding:12px 13px;resize:vertical;border:1px solid #d5e6d5;border-radius:12px;outline:0;background:#fcfffb;color:var(--ink);font-size:14px;line-height:1.7}.draft.short{min-height:50px;resize:none}.draft:focus{border-color:#6db476;box-shadow:0 0 0 3px #e6f5e2}.actions{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:11px}.primary,.ghost{min-height:42px;padding:9px 14px;border:0;border-radius:10px;font-size:13px;font-weight:800}.primary{background:var(--ink);color:#fff}.ghost{background:#eef8eb;color:var(--deep)}.feedback{min-height:20px;margin-left:auto;color:#547461;font-size:12px}.solution{display:none;margin-top:16px;padding:16px;border:1px solid #cfe7ca;border-radius:14px;background:#f4fbf1;font-size:14px;line-height:1.8}.solution.show{display:block}
.public-tag{display:flex;min-width:0;align-items:center;justify-content:flex-end}.supplemental-tag{flex:none;padding:5px 9px;border:1px solid #cfe5ca;border-radius:99px;background:#f4fbf1;color:#4e7d58;font-size:10px;font-weight:900}.source-material{margin:0 0 20px;border:1px solid #dcebd9;border-radius:14px;background:#fbfefa}.source-material summary{cursor:pointer;padding:11px 13px;color:#347047;font-size:12px;font-weight:900}.material-copy{max-height:45vh;padding:0 14px 15px;overflow:auto;color:#385847;font:500 14px/1.78 Georgia,"Times New Roman",serif;white-space:pre-line}.source-material[open] summary{border-bottom:1px dashed #dcebd9;margin-bottom:12px}
.question-text .choice-option{position:relative;display:grid;grid-template-columns:30px minmax(0,1fr);gap:9px;align-items:start;cursor:pointer;transition:.18s ease}.choice-option:hover,.choice-option:focus-within{border-color:#9dcc98;background:#f3faef}.question-text .choice-option.selected{border-color:#65ad71;background:#eaf7e7;box-shadow:0 0 0 2px #dff1d6}.choice-option input{position:absolute;opacity:0;pointer-events:none}.choice-letter{display:grid;place-items:center;width:28px;height:28px;margin-top:1px;border-radius:8px;background:#edf6e9;color:#347047;font:800 12px Consolas,monospace}.choice-option.selected .choice-letter{background:#347047;color:#fff}.choice-prompt{margin-bottom:0;color:#688577;font-weight:700}
.pager{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;margin-top:14px}.nav-btn{min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--deep);font-size:13px;font-weight:800}.nav-btn:disabled{cursor:not-allowed;opacity:.42}.pager-status{color:var(--muted);font:12px Consolas,monospace;text-align:center;white-space:nowrap}
.pet{--offset:0%;position:fixed;right:10px;bottom:8px;width:128px;z-index:8;filter:drop-shadow(0 8px 12px #426b4933);pointer-events:none;user-select:none}.bubble{position:absolute;left:50%;top:-40px;transform:translateX(-50%);width:142px;padding:7px 9px;border:1px solid var(--line);border-radius:12px;background:#fff;text-align:center;font-size:10px;line-height:1.45}.bubble:after{content:"";position:absolute;left:50%;bottom:-5px;width:9px;height:9px;transform:translateX(-50%) rotate(45deg);border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.frame{height:122px;overflow:hidden;position:relative}.sprite{position:absolute;left:0;bottom:-20px;width:400%;max-width:none;transform:translateX(var(--offset));transition:.5s ease}.pet.done .frame{animation:bounce .65s ease infinite alternate}.pet-label{margin-top:-4px;padding:4px;border-radius:99px;background:#f6fbf4ed;color:#538060;font:700 10px Consolas,monospace;text-align:center}@keyframes bounce{to{transform:translateY(-6px)}}
@media(max-width:680px){.top{height:60px;padding:0 14px}.brand{font-size:17px}.term{display:none}main{padding:24px 12px 150px}.hero{display:block;padding:22px 20px;border-radius:21px}.hero h1{font-size:34px;letter-spacing:-1.5px}.hero p{font-size:13px}.score{display:inline-block;min-width:0;margin-top:15px;padding:9px 12px;text-align:left}.score b{display:inline;margin-right:5px;font-size:20px}.question-card{padding:17px 14px;border-radius:17px}.q-head{align-items:flex-start;flex-wrap:wrap}.public-tag{width:100%;justify-content:flex-start}.source-material{margin-bottom:16px}.material-copy{max-height:42vh;padding:0 12px 13px;font-size:14px;line-height:1.72}.question-text{font-size:16px}.draft{min-height:125px}.actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.primary,.ghost{width:100%;min-height:44px}.feedback{grid-column:1/-1;margin:0;text-align:center}.solution{padding:13px 11px}.pager{grid-template-columns:1fr 1fr}.pager-status{grid-column:1/-1;grid-row:1}.nav-btn{grid-row:2}.pet{right:3px;bottom:5px;width:90px}.frame{height:87px}.sprite{bottom:-14px}.bubble{top:-35px;width:108px;padding:5px 7px;font-size:9px}.pet-label{font-size:8px;white-space:nowrap}}
.question-text{white-space:pre-line}