:root{--ink:#1f2b27;--muted:#718078;--canvas:#f5f7f2;--line:#e2e8df;--panel:#fffefa;--green:#1c594b;--lime:#deeca5;--orange:#efaa64;--red:#c96058;--sans:ui-sans-serif,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;--serif:Georgia,"Noto Serif SC",serif}*{box-sizing:border-box}body{margin:0;background:var(--canvas);color:var(--ink);font:14px var(--sans)}button,input,textarea,select{font:inherit}button{cursor:pointer}.auth-screen{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 75% 15%,#e3efb3 0,transparent 24rem),var(--canvas)}.auth-card{width:min(100%,420px);background:#fffefa;border:1px solid var(--line);box-shadow:0 18px 55px #1e49301a;border-radius:18px;padding:35px}.auth-brand{display:flex;align-items:center;gap:9px;font-size:23px}.auth-brand span,.brand>span{height:34px;width:34px;border-radius:10px;display:grid;place-items:center;background:var(--green);color:#f3f6d7;font:20px Georgia}.auth-brand small,.brand small{font:9px ui-monospace,monospace;letter-spacing:1px;color:#7b8780;display:block}.auth-card h1,.heading h1{font:700 34px var(--serif);letter-spacing:-1px;margin:6px 0 8px}.auth-card form{margin-top:24px}.auth-card label,form label,.answer-label{display:block;font-size:12px;font-weight:700;color:#57645d;margin:0 0 15px}.auth-card input,form input,form textarea,form select,.answer-label input,#search{display:block;width:100%;margin-top:7px;padding:10px 11px;border:1px solid #dce4da;border-radius:8px;background:#fff;color:#25342d;outline:none}.auth-card input:focus,form input:focus,form textarea:focus,form select:focus,.answer-label input:focus,#search:focus{border-color:#6b9b82;box-shadow:0 0 0 3px #e3f1df}.auth-note{font-size:10px;line-height:1.6;color:#96a19a;margin:20px 0 0}.text-button{border:0;background:none;padding:0;color:#517563;font-size:12px;font-weight:700}.auth-card .text-button{margin-top:16px}.button{border:0;border-radius:8px;padding:10px 14px;font-size:12px;font-weight:700;transition:transform .15s,box-shadow .15s}.button:hover{transform:translateY(-1px);box-shadow:0 5px 12px #2045351e}.primary{background:var(--green);color:white}.dark{background:#223f35;color:white}.outline{background:transparent;border:1px solid #cdd8ce;color:#40594d}.full{width:100%}.eyebrow{font:10px ui-monospace,monospace;color:#829087;letter-spacing:.6px;text-transform:uppercase;margin:0}.muted{color:var(--muted);line-height:1.7;margin:0}.layout{display:flex;min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:246px;padding:27px 17px 17px;background:#f0f3ec;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:2}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-size:19px;margin:0 10px 32px}.student-card{display:flex;align-items:center;gap:9px;padding:10px;background:#fbfcf8;border:1px solid #e0e6dd;border-radius:11px;margin-bottom:22px}.avatar{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#f4cdaa;color:#8d5f3f;font-weight:800}.student-card strong,.student-card small{display:block;font-size:12px}.student-card small{font-size:10px;color:var(--muted);margin-top:3px}.icon-button{margin-left:auto;border:0;background:none;font-size:18px;color:#60806f}.sidebar nav{display:grid;gap:4px}.nav{height:42px;display:flex;gap:11px;align-items:center;color:#5a6961;text-decoration:none;border-radius:8px;padding:0 10px;font-weight:700;font-size:13px}.nav.active,.nav:hover{background:#dfeacd;color:#245b4c}.nav b{margin-left:auto;font:10px ui-monospace,monospace;background:#d9eee4;padding:2px 6px;border-radius:12px}.sidebar-bottom{margin-top:auto;border-top:1px solid var(--line);padding:15px 10px 0}.sidebar-bottom small{display:block;margin-top:10px;color:#97a19a;font-size:10px}main{width:calc(100% - 246px);margin-left:246px}header{height:68px;border-bottom:1px solid var(--line);padding:0 clamp(24px,5vw,74px);display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#77847c}header>div{display:flex;gap:7px;align-items:center}.online-dot{width:7px;height:7px;background:#72a46c;border-radius:50%}.menu-button{display:none}.view{display:none;max-width:1360px;margin:auto;padding:47px clamp(24px,5vw,74px) 70px}.view.active{display:block}.heading{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:30px}.heading h1{margin-top:7px}.heading h1 em{font-style:normal;font-size:22px}.hero{background:#dfeca9;min-height:232px;border-radius:16px;padding:31px 36px;display:flex;justify-content:space-between;overflow:hidden;margin-bottom:19px}.pill{display:inline-block;border-radius:16px;padding:5px 9px;background:#f7fae8;color:#627442;font:10px ui-monospace,monospace}.hero h2{font:28px var(--serif);margin:14px 0 7px}.hero h2 b{color:#315c42}.hero p{color:#59684e;font-size:12px;margin-bottom:20px}.hero-paper{width:185px;height:164px;padding:22px 18px;background:#fffdf7;border:1px solid #dce1bf;box-shadow:8px 9px #cbd995;transform:rotate(4deg);margin:3px 18px 0 40px;color:#5b7362;display:flex;flex-direction:column}.hero-paper b{font:21px var(--serif);color:#345546;margin:25px 0}.hero-paper small,.hero-paper span{font-size:10px}.cards{display:grid;gap:17px}.three{grid-template-columns:repeat(3,1fr);margin-bottom:19px}.stat,.panel{background:var(--panel);border:1px solid #e4e9e1;border-radius:12px;box-shadow:0 2px 4px #263c3010}.stat{padding:20px}.stat span{display:block;color:#7c8881;font-size:11px}.stat b{display:block;font:34px var(--serif);margin:5px 0}.stat small{color:#829087;font-size:10px}.panel{padding:24px}.section-head{display:flex;justify-content:space-between;align-items:start;margin-bottom:19px}.section-head h2,.panel h2{font:20px var(--serif);letter-spacing:-.3px;margin:5px 0}.meters{display:grid;gap:17px}.meter-row{max-width:650px}.meter-row>div{display:flex;justify-content:space-between;font-size:12px}.meter-row b{font:10px ui-monospace,monospace;color:#53795f}.meter{height:7px;border-radius:8px;overflow:hidden;background:#edf0e9;margin-top:8px}.meter i{display:block;height:100%;border-radius:inherit;background:#90bd78}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:1060px}.drop-zone{min-height:335px;border:1.5px dashed #b9cfb9;border-radius:9px;background:#fbfdf8;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;text-align:center}.drop-zone.drag{background:#f0f8e7;border-color:#58836c}.upload-sign{font-size:39px;color:#6d9871}.drop-zone small{color:#8c9890;font-size:10px}.notice{font-size:11px;line-height:1.7;color:#738078;padding:12px;background:#f2f7eb;border-radius:7px;margin:14px 0 0}textarea{height:93px;resize:vertical}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.tabs{display:flex;gap:3px;padding:4px;background:#e9eee7;border-radius:8px}.tabs button{border:0;background:none;border-radius:6px;padding:6px 12px;color:#718078;font-size:11px}.tabs button.selected{background:#fff;color:#315e4e;box-shadow:0 1px 4px #253d3017}#search{width:230px;margin:0}.mistake-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.mistake-card{min-height:178px;padding:17px;background:#fffefa;border:1px solid #e3e9e0;border-radius:11px;display:flex;flex-direction:column}.mistake-card h3{font:18px var(--serif);line-height:1.5;margin:15px 0 7px}.mistake-card p{font-size:10px;color:#7d8981;margin:0;line-height:1.7}.mistake-card footer{border-top:1px solid #eef1ec;margin-top:auto;padding-top:11px;display:flex;justify-content:space-between;color:#89948d;font-size:10px}.label{font:10px ui-monospace,monospace;background:#e9f1dd;color:#55754b;padding:4px 7px;border-radius:5px}.label.语文{background:#f6e7eb;color:#a46978}.label.英语{background:#e6f1f4;color:#56808a}.empty{grid-column:1/-1;padding:48px;text-align:center;border:1px dashed #ccd5c8;border-radius:10px;color:#7d8981}.practice-shell{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:20px;max-width:990px}.question-panel{background:#fffefa;border:1px solid #e3e9e0;border-radius:13px;padding:32px;min-height:400px}.question-top{display:flex;justify-content:space-between;align-items:center}.question-top>b{font:12px ui-monospace,monospace;color:#6c8074}.question-panel h2{font:27px var(--serif);line-height:1.5;margin:42px 0 13px}.hint{font-size:12px;color:#718078;min-height:21px}.answer-label{margin-top:30px;max-width:480px}.button-row{display:flex;gap:13px;align-items:center}.feedback{max-width:480px;margin-top:16px;font-size:12px;line-height:1.6;border-radius:8px}.feedback.good{background:#e5f1d9;color:#466a3d;padding:10px 12px}.feedback.bad{background:#fff0e4;color:#985b31;padding:10px 12px}.queue-panel{height:max-content}.queue-panel>b{display:block;font:28px var(--serif);margin:8px 0}.progress{height:6px;border-radius:6px;background:#e9eee7;overflow:hidden}.progress i{display:block;background:#7ead70;height:100%;width:0;transition:width .2s}.queue-panel .muted{font-size:11px;margin-top:15px}.knowledge-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:20px}.topic-nav{background:#edf2eb;border:1px solid #e0e7df;border-radius:11px;padding:10px;height:max-content;display:grid;gap:3px}.topic-nav button{border:0;background:none;text-align:left;padding:10px;border-radius:7px;color:#53655b;font-size:12px}.topic-nav button.active{background:#dceaca;color:#315d4d;font-weight:700}.topic-nav small{float:right;color:#9c713d}.topic-detail{min-height:390px}.topic-detail ul{padding-left:20px;color:#66736b;font-size:12px;line-height:2}.topic-columns{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:25px}.topic-columns>div{border:1px solid #e8ede6;border-radius:9px;padding:15px}.topic-columns>div:last-child{background:#fff7ef}.recommendations{padding-left:22px;margin:18px 0}.recommendations li{padding:11px 0;border-bottom:1px solid #edf0eb;font-size:12px}.toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);background:#253f35;color:#fff;padding:10px 15px;border-radius:7px;font-size:12px;opacity:0;transition:.2s;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%,0)}@media(max-width:850px){.sidebar{transform:translateX(-100%);transition:transform .2s}.sidebar.open{transform:none}main{width:100%;margin:0}.menu-button{display:block;border:0;background:none;font-size:20px;margin-right:12px}.two-col,.practice-shell,.knowledge-layout{grid-template-columns:1fr}.topic-nav{display:flex;overflow:auto}.topic-nav button{white-space:nowrap}.mistake-list{grid-template-columns:repeat(2,1fr)}}@media(max-width:570px){header{padding:0 18px}.view{padding:31px 18px 50px}.heading{flex-direction:column;align-items:flex-start;gap:15px}.heading h1{font-size:29px}.hero{padding:24px;min-height:240px}.hero-paper{display:none}.three,.mistake-list,.topic-columns{grid-template-columns:1fr}.toolbar{flex-direction:column;align-items:stretch;gap:12px}#search{width:100%}.tabs{width:max-content}.question-panel{padding:23px}.question-panel h2{font-size:23px}.form-grid{grid-template-columns:1fr}}