:root{--navy:#16324f;--blue:#2364aa;--teal:#0f8a70;--orange:#d0712f;--rose:#c54b68;--card:#fff;--ink:#17243a;--muted:#637086;--line:#dbe5f1;--shadow:0 12px 30px rgba(22,50,79,.1)}*{box-sizing:border-box}body{margin:0;background:linear-gradient(135deg,#f8fbff,#f2f8f5);color:var(--ink);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;min-height:100vh}body[data-theme=dark]{--card:#112036;--ink:#edf5ff;--muted:#aabbd0;--line:#29405c;background:#091321}.topbar{min-height:76px;padding:12px 20px;background:linear-gradient(135deg,#0b2948,var(--navy));color:#fff;display:flex;align-items:center;gap:14px}.back{color:#fff;text-decoration:none;border:1px solid rgba(255,255,255,.35);border-radius:12px;padding:9px 12px}.title{font-size:clamp(23px,3vw,36px);font-weight:850}.lesson{padding:7px 12px;border-radius:999px;background:var(--blue);font-weight:750}.tabs{display:flex;gap:6px;margin-left:auto}.tabs button.active{background:#fff;color:var(--navy)}.top-actions{display:flex;gap:8px}button,input,select{font:inherit}button{min-height:44px;border:1px solid var(--line);border-radius:12px;padding:9px 12px;background:var(--card);color:var(--ink);font-weight:720;cursor:pointer}.topbar button{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.3)}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(35,100,170,.28);outline-offset:2px}.app{max-width:1600px;margin:auto;padding:16px}.layout{display:grid;grid-template-columns:310px minmax(560px,1fr) 365px;gap:16px;align-items:start}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}.head{padding:13px 15px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.head h2{font-size:18px;margin:0}.body{padding:15px}.formula{font-family:Georgia,"Times New Roman",serif;font-size:25px;text-align:center;padding:15px 8px;border:1px solid #bfd1e8;border-radius:14px;background:rgba(35,100,170,.06);margin-bottom:13px}.field{margin-bottom:12px}.field label{display:flex;justify-content:space-between;align-items:center;font-weight:700;margin-bottom:6px}.field input,.field select{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink)}.field label input{width:120px}.hintline{font-size:12px;color:var(--muted);line-height:1.5;margin-top:5px}.actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.next{background:var(--teal);color:#fff;border-color:var(--teal)}.presets{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-top:12px}.presets button.active{background:var(--navy);color:#fff;border-color:var(--navy)}.zoom-panel{margin-top:12px;padding:11px;border:1px solid var(--line);border-radius:13px;background:rgba(35,100,170,.05)}.zoom-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;font-size:13px}.zoom-head b{color:var(--teal)}.zoom-controls{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.zoom-controls button{padding:7px 4px;min-height:40px;font-size:13px}.zoom-controls button.active{background:var(--teal);color:#fff;border-color:var(--teal)}.domain-label{margin-top:7px;color:var(--muted);font-size:11px;text-align:center;font-variant-numeric:tabular-nums}.zoom-hint{margin-top:4px;color:var(--muted);font-size:11px;text-align:center}.error{margin-top:12px;padding:10px 12px;border-radius:12px;background:rgba(197,75,104,.1);color:#9f2949;font-size:13px;line-height:1.5;display:none}.graph-card .body{padding:10px}.graph-wrap{position:relative;border:1px solid var(--line);border-radius:14px;overflow:hidden;min-height:515px;background:linear-gradient(180deg,rgba(35,100,170,.035),transparent)}#graph{width:100%;height:500px;display:block}.error-wrap{margin-top:10px;border:1px solid var(--line);border-radius:14px;overflow:hidden;position:relative}.error-title{position:absolute;left:12px;top:8px;font-size:13px;font-weight:750;color:var(--rose)}#errorChart{width:100%;height:150px;display:block}.prompt{margin-top:10px;padding:11px;border:1px solid rgba(208,113,47,.35);border-radius:12px;background:rgba(208,113,47,.08);font-weight:750;text-align:center;color:var(--orange)}.table-wrap{max-height:430px;overflow:auto;border:1px solid var(--line);border-radius:13px}table{width:100%;border-collapse:collapse;font-size:12.5px;font-variant-numeric:tabular-nums}th,td{padding:7px 6px;border-bottom:1px solid var(--line);text-align:right}th{position:sticky;top:0;background:#eaf2fd;color:#173a63}body[data-theme=dark] th{background:#1c3654;color:#eaf4ff}th:first-child,td:first-child{text-align:center}.status{margin-top:12px;padding:13px;border-radius:14px;border:1px solid rgba(15,138,112,.35);background:rgba(15,138,112,.08)}.status strong{display:block;font-size:20px;color:var(--teal);margin-bottom:5px}.status span{font-size:13px;line-height:1.55;color:var(--muted)}.criteria{margin-top:12px;display:grid;grid-template-columns:1fr 1fr;gap:8px}.criteria div{padding:10px;border:1px solid var(--line);border-radius:11px;text-align:center;font-size:13px}.criteria b{display:block;margin-top:4px}body.focus .sidebar,body.focus .evidence{display:none}body.focus .layout{grid-template-columns:1fr}
    @media(max-width:1180px){.tabs{order:4;width:100%;margin:0}.layout{grid-template-columns:290px 1fr}.evidence{grid-column:1/-1}}@media(max-width:760px){.topbar{flex-wrap:wrap}.layout{grid-template-columns:1fr}.evidence{grid-column:auto}.graph-wrap{min-height:430px}#graph{height:420px}.title{font-size:22px}.top-actions{margin-left:auto}}

    /* 课堂清晰度优化：放大关键信息，加粗图表元素，并保留一屏内的三栏教学布局。 */
    .topbar{min-height:80px;padding:12px 18px;box-shadow:0 8px 24px rgba(11,41,72,.18)}
    .back,.topbar button{font-size:16px}.tabs button{min-width:94px;padding-left:15px;padding-right:15px}
    .app{max-width:1740px;padding:16px 18px}.layout{grid-template-columns:330px minmax(600px,1fr) 410px;gap:16px}
    .head{padding:15px 17px}.head h2{font-size:20px}.head>span{font-size:15px;font-weight:650;color:var(--muted)}
    .body{padding:17px}.formula{font-size:30px;line-height:1.35;padding:17px 8px;margin-bottom:15px}
    .field{margin-bottom:14px}.field label{font-size:16px}.field input,.field select{padding:11px 12px;font-size:16px}.field label input{width:126px;font-weight:700}
    .hintline{font-size:13px}.actions{gap:10px}.actions button{min-height:48px;font-size:16px}.presets{gap:9px;margin-top:13px}.presets button{min-height:46px;font-size:17px}
    .zoom-panel{padding:13px;margin-top:13px}.zoom-head{font-size:15px;margin-bottom:10px}.zoom-controls{gap:7px}.zoom-controls button{min-height:44px;font-size:14px}.domain-label{font-size:13px;margin-top:9px}.zoom-hint{font-size:12px;line-height:1.45;margin-top:6px}
    .graph-card .body{padding:12px}.graph-wrap{border-width:1.5px}.graph-wrap #graph{cursor:grab;touch-action:none;user-select:none}.graph-wrap #graph:focus-visible{outline:3px solid rgba(35,100,170,.55);outline-offset:-4px}.graph-wrap #graph.dragging{cursor:grabbing}.graph-help{position:absolute;right:14px;top:12px;z-index:2;padding:7px 11px;border:1px solid rgba(35,100,170,.28);border-radius:999px;background:color-mix(in srgb,var(--card) 90%,transparent);color:var(--blue);font-size:14px;font-weight:750;pointer-events:none;box-shadow:0 3px 10px rgba(22,50,79,.08)}.error-wrap{margin-top:12px}.error-title{left:14px;top:10px;font-size:18px}.prompt{font-size:17px;line-height:1.5;padding:12px 14px;margin-top:12px}
    .table-wrap{max-height:474px}table{font-size:15.5px}th,td{padding:8px 7px;line-height:1.28}th{font-size:15px}
    .status{padding:14px;margin-top:12px}.status strong{font-size:22px;margin-bottom:7px}.status span{font-size:15px;line-height:1.6}.criteria{gap:10px;margin-top:12px}.criteria div{padding:11px 8px;font-size:15px;line-height:1.4}.criteria b{font-size:16px;margin-top:6px}
    @media(max-width:1500px){.app{padding-left:14px;padding-right:14px}.layout{grid-template-columns:305px minmax(560px,1fr) 375px}.formula{font-size:27px}table{font-size:14px}th{font-size:13.5px}th,td{padding-left:5px;padding-right:5px}}
    @media(max-width:1340px){.tabs{order:initial;width:auto;margin-left:auto}.layout{grid-template-columns:300px minmax(0,1fr)}.evidence{grid-column:1/-1}.table-wrap{max-height:390px}}
    @media(max-width:1120px){.topbar{flex-wrap:wrap}.tabs{order:4;width:100%;margin:0}.tabs button{flex:1}.top-actions{margin-left:auto}}
    @media(max-width:760px){.topbar{padding:11px 12px}.app{padding:12px}.layout{grid-template-columns:1fr}.evidence{grid-column:auto}.head{padding:13px 14px}.head h2{font-size:18px}.body{padding:14px}.formula{font-size:25px}.graph-wrap{min-height:440px}#graph{height:430px}.graph-help{right:10px;top:9px;font-size:12px;padding:6px 9px}.prompt{font-size:15px}.title{font-size:23px}.top-actions{margin-left:auto}table{font-size:14px}}