:root{--ink:#162033;--muted:#667085;--card:rgba(255,255,255,.9);--line:#e7eaf2;--brand:#5b67f1;--brand2:#7b61ff;--good:#14804a;--bad:#c43737;--warn:#a55b00;--shadow:0 18px 55px rgba(36,46,94,.10);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:linear-gradient(180deg,#f8f9ff 0%,#f4f8ff 55%,#fbfbfd 100%);min-height:100vh}.bg-orb{position:fixed;border-radius:999px;filter:blur(70px);opacity:.25;pointer-events:none;z-index:-1}.orb-1{width:340px;height:340px;background:#b9c3ff;top:-100px;right:-80px}.orb-2{width:300px;height:300px;background:#d9c6ff;left:-120px;top:38vh}.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px max(18px,calc((100vw - 1120px)/2));backdrop-filter:blur(18px);background:rgba(248,249,255,.78);border-bottom:1px solid rgba(230,233,242,.8)}button{font:inherit}.brand{border:0;background:transparent;display:flex;align-items:center;gap:10px;padding:0;cursor:pointer;color:var(--ink);text-align:left}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:white;font-weight:850;box-shadow:0 8px 20px rgba(91,103,241,.25)}.brand b{display:block;font-size:15px}.brand small{display:block;color:var(--muted);font-size:11px;margin-top:1px}.top-actions{display:flex;gap:8px}.ghost,.soft,.primary,.danger{border:0;border-radius:12px;padding:10px 14px;cursor:pointer;transition:.2s}.ghost{background:#fff;color:#344054;border:1px solid var(--line)}.ghost:hover,.soft:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(30,40,80,.08)}.badge{display:inline-grid;place-items:center;min-width:21px;height:21px;border-radius:11px;padding:0 6px;background:#eef0ff;color:#4d56c8;font-size:11px;font-weight:800}.app{max-width:1120px;margin:0 auto;padding:28px 18px 56px}.hero{display:grid;grid-template-columns:1.35fr .65fr;gap:20px;align-items:stretch;margin:8px 0 26px}.hero-main,.hero-side,.panel,.quiz-card,.stat-card,.level-card{background:var(--card);border:1px solid rgba(229,232,242,.9);box-shadow:var(--shadow);border-radius:24px}.hero-main{padding:30px}.eyebrow{display:inline-flex;align-items:center;gap:7px;padding:7px 10px;border-radius:999px;background:#eef0ff;color:#4d56c8;font-size:12px;font-weight:800}.hero h1{font-size:clamp(30px,5vw,54px);line-height:1.05;margin:16px 0 12px;letter-spacing:-1.4px}.hero h1 span{background:linear-gradient(90deg,#4f5ce6,#895be8);-webkit-background-clip:text;color:transparent}.hero p{margin:0;color:var(--muted);font-size:15px;line-height:1.8;max-width:700px}.hero-side{padding:24px;display:flex;flex-direction:column;justify-content:center;gap:16px}.progress-ring{--p:0;width:132px;height:132px;border-radius:50%;margin:0 auto;display:grid;place-items:center;background:conic-gradient(var(--brand) calc(var(--p)*1%),#eceefa 0);position:relative}.progress-ring:after{content:"";position:absolute;width:104px;height:104px;background:white;border-radius:50%}.progress-ring strong,.progress-ring small{position:relative;z-index:1;display:block;text-align:center}.progress-ring strong{font-size:26px}.progress-ring small{color:var(--muted);font-size:11px}.mini-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.mini-stat{background:#f7f8fc;border-radius:14px;padding:10px;text-align:center}.mini-stat b{display:block;font-size:17px}.mini-stat span{font-size:10px;color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:12px;margin:22px 2px 14px}.section-head h2{margin:0;font-size:22px}.section-head p{margin:4px 0 0;color:var(--muted);font-size:13px}.level-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.level-card{padding:17px;position:relative;overflow:hidden}.level-card.completed{border-color:#cdebd9}.level-top{display:flex;justify-content:space-between;align-items:center}.level-no{font-weight:850;font-size:16px}.level-status{font-size:11px;padding:5px 8px;border-radius:999px;background:#f1f3f8;color:#667085}.completed .level-status{background:#e7f7ee;color:#14804a}.stage-dots{display:flex;gap:6px;margin:15px 0 12px}.stage-dot{height:7px;flex:1;border-radius:8px;background:#e8eaf2}.stage-dot.pass{background:linear-gradient(90deg,#5b67f1,#7b61ff)}.level-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:11px}.level-card .soft{width:100%;margin-top:13px}.soft{background:#eef0ff;color:#4e58c9;font-weight:750}.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:800;box-shadow:0 10px 24px rgba(91,103,241,.23)}.danger{background:#fff0f0;color:#b42318;font-weight:700}.crumb{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px;margin:3px 0 16px}.crumb button{border:0;background:transparent;color:#4f5ce6;cursor:pointer;padding:0}.level-header{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:18px}.level-header h1{margin:0;font-size:28px}.level-header p{margin:6px 0 0;color:var(--muted)}.stage-list{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.panel{padding:22px}.stage-card h3{margin:10px 0 7px;font-size:19px}.stage-card p{color:var(--muted);font-size:13px;line-height:1.65;min-height:44px}.stage-tag{font-size:11px;font-weight:800;color:#4f5ce6;background:#eff1ff;border-radius:999px;padding:6px 9px;display:inline-block}.stage-score{margin-top:15px;padding-top:15px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}.stage-score strong{font-size:18px;color:var(--ink)}.word-preview{margin-top:16px}.word-preview h3{font-size:15px}.chip-wrap{display:flex;flex-wrap:wrap;gap:8px}.word-chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 10px;font-size:12px}.priority-A{border-color:#d9dcff;background:#f6f6ff}.quiz-shell{max-width:820px;margin:0 auto}.quiz-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}.quiz-head .meta{color:var(--muted);font-size:12px}.bar{height:8px;background:#e9ebf3;border-radius:9px;overflow:hidden;margin:10px 0 18px}.bar>span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:9px;transition:width .25s}.quiz-card{padding:clamp(22px,5vw,40px)}.q-kicker{display:flex;justify-content:space-between;gap:12px;align-items:center;color:var(--muted);font-size:12px}.priority-pill{padding:5px 8px;border-radius:999px;background:#f0f2f8}.question{font-size:clamp(27px,5vw,42px);line-height:1.2;margin:24px 0 8px;font-weight:850;letter-spacing:-.5px;word-break:break-word}.definition-q{font-size:21px;line-height:1.55;font-weight:700;letter-spacing:0}.phonetic{color:var(--muted);font-size:13px;margin-bottom:22px}.speaker{border:0;background:#f3f4ff;color:#4f5ce6;border-radius:10px;padding:7px 9px;cursor:pointer;margin-left:7px}.options{display:grid;gap:10px;margin-top:22px}.option{display:flex;align-items:flex-start;gap:10px;width:100%;padding:14px 15px;border-radius:14px;border:1px solid var(--line);background:#fff;cursor:pointer;text-align:left;color:var(--ink);line-height:1.5}.option:hover:not(:disabled){border-color:#bcc2ff;background:#fafaff}.option.correct{border-color:#9bd4b3;background:#effaf4;color:#106a3d}.option.wrong{border-color:#f0b4b4;background:#fff3f3;color:#a52a2a}.option:disabled{cursor:default}.option-letter{flex:0 0 26px;height:26px;border-radius:8px;background:#f0f2f7;display:grid;place-items:center;font-size:11px;font-weight:850}.feedback{margin-top:18px;border-radius:14px;padding:14px 15px;font-size:13px;line-height:1.65}.feedback.good{background:#effaf4;color:#106a3d}.feedback.bad{background:#fff4f2;color:#9f2b20}.feedback b{display:block;margin-bottom:3px}.next-row{display:flex;justify-content:flex-end;margin-top:16px}.typing{margin-top:22px}.typing input{width:100%;border:2px solid #dfe2ec;border-radius:15px;padding:16px 17px;font-size:18px;outline:none;background:#fff}.typing input:focus{border-color:#8f97ff;box-shadow:0 0 0 4px rgba(91,103,241,.08)}.typing-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:12px}.hint{background:#f7f8fc;border-radius:12px;padding:10px 12px;color:#667085;font-size:12px;margin-top:10px}.result{text-align:center;padding:36px}.result-icon{font-size:50px}.result h2{font-size:30px;margin:12px 0 8px}.result .bigscore{font-size:46px;font-weight:900;margin:8px 0}.pass-text{color:var(--good)}.fail-text{color:var(--bad)}.result-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:22px}.mistakes{margin-top:24px;text-align:left;border-top:1px solid var(--line);padding-top:18px}.mistake-row{display:grid;grid-template-columns:1.1fr 1fr 1.8fr;gap:10px;padding:10px 0;border-bottom:1px dashed #e8eaf1;font-size:12px}.wrong-list{display:grid;gap:10px}.wrong-row{display:grid;grid-template-columns:1fr 1.1fr 1.8fr auto;gap:10px;align-items:center;padding:13px 15px;background:#fff;border:1px solid var(--line);border-radius:14px;font-size:12px}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}.stat-card{padding:20px}.stat-card b{font-size:28px;display:block}.stat-card span{color:var(--muted);font-size:12px}.empty{padding:48px 20px;text-align:center;color:var(--muted)}footer{max-width:1120px;margin:0 auto;padding:0 18px 34px;color:#8a91a2;font-size:10px;line-height:1.7;text-align:center}
@media(max-width:900px){.hero{grid-template-columns:1fr}.level-grid{grid-template-columns:repeat(3,1fr)}.stage-list{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){.topbar{padding:11px 13px}.top-actions .ghost{padding:9px 10px;font-size:12px}.top-actions .ghost:nth-child(2){display:none}.app{padding:18px 13px 44px}.hero-main{padding:23px}.hero-side{padding:18px}.level-grid{grid-template-columns:repeat(2,1fr);gap:10px}.level-card{padding:14px}.stage-list{gap:11px}.level-header{align-items:flex-start;flex-direction:column}.quiz-card{border-radius:20px;padding:22px 17px}.question{margin-top:18px}.wrong-row{grid-template-columns:1fr}.mistake-row{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.brand small{display:none}}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,16px);background:#172033;color:#fff;padding:10px 14px;border-radius:12px;font-size:12px;opacity:0;pointer-events:none;transition:.22s;z-index:50;box-shadow:0 10px 30px rgba(0,0,0,.18)}.toast.show{opacity:1;transform:translate(-50%,0)}