:root{font-family:'Microsoft YaHei','Noto Sans CJK SC',sans-serif;color:#172f39;background:#f3f6f7;font-size:15px;line-height:1.65;--teal:#126b78;--line:#d5e0e4;--muted:#5e737c}*{box-sizing:border-box}body{margin:0}header{display:flex;justify-content:space-between;align-items:center;padding:18px 4%;background:white;border-bottom:1px solid var(--line);gap:20px}a{color:var(--teal);text-underline-offset:4px}.brand{text-decoration:none;display:flex;gap:20px;align-items:baseline}.brand b{font-size:22px}.brand span{color:var(--muted);font-size:13px}main{max-width:1500px;margin:auto;padding:36px 4% 90px}h1{font-size:30px;line-height:1.4;margin:5px 0 12px;letter-spacing:-.5px}h2{font-size:20px;line-height:1.45;margin:0 0 14px}h3{font-size:17px}h4{font-size:14px}p{margin:8px 0 16px}button,input,textarea,select{font:inherit}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid #b5c9cf;border-radius:6px;background:white;color:#244953;padding:9px 16px;text-decoration:none;cursor:pointer;line-height:1.5;min-height:42px;font-weight:500}button:hover,.button:hover{background:#edf5f6;border-color:var(--teal)}button:disabled{cursor:not-allowed;opacity:.5}button.primary,.button.primary{background:var(--teal);color:white;border-color:var(--teal)}button.primary:hover,.button.primary:hover{background:#0c5661}button.quiet{border:0;background:transparent;color:var(--muted);font-size:13px;padding:5px 8px}.danger{color:#a23e3e;border-color:#dfbbbb}input,textarea,select{width:100%;border:1px solid #c1cfd4;border-radius:5px;padding:10px 12px;background:#fff;color:#172f39;min-width:0}textarea{resize:vertical;min-height:88px;line-height:1.75}input[type=checkbox]{width:17px;height:17px;flex-shrink:0;accent-color:var(--teal)}:focus-visible{outline:3px solid #65b5c1;outline-offset:3px}.field{display:flex;flex-direction:column;gap:7px;margin-bottom:18px;font-size:14px}.field>span{font-weight:600}.muted{color:var(--muted)}.fine{color:var(--muted);font-size:13px;line-height:1.7}.eyebrow{font-size:12px;letter-spacing:1.4px;color:var(--teal);font-weight:700;margin:0 0 12px}.page-heading{margin:0 0 32px}.panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:26px}.start-strip{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:30px;background:#e4f0f1;border:1px solid #c8dfe2;border-radius:8px;margin:28px 0 40px}.start-strip p{margin:0;color:#43626c}.section-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:24px 0 16px}.section-head h2,.section-head h3{margin:0}.section-head select{width:auto}.history-list{border-top:1px solid var(--line)}.history-row{display:flex;align-items:center;gap:20px;padding:22px 6px;border-bottom:1px solid var(--line)}.version-mark{background:#e5ecef;color:#607a85;border-radius:5px;width:48px;height:48px;display:grid;place-items:center;font-size:13px;flex-shrink:0}.history-meta{flex:1;min-width:0}.history-title{font-size:17px;font-weight:700;color:#244550;text-decoration:none;overflow-wrap:anywhere}.history-meta p{font-size:12px;color:var(--muted);margin:5px 0 0}.row-actions,.toolbar{display:flex;align-items:center;gap:10px}.status-chip{background:#edf2f4;border:1px solid #dce6ea;color:#536e79;padding:4px 10px;border-radius:4px;font-size:12px;max-width:300px}.status-chip.confirmed{background:#e8f2ee;color:#356c54}.empty{padding:56px 24px;text-align:center;color:var(--muted)}.empty h3{color:#274651}.import-layout,.source-layout{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:24px}.upload{display:block;border:1px dashed #96b9c1;background:#f6fafb;border-radius:6px;padding:24px 16px;margin:20px 0}.upload input{margin-top:14px;font-size:12px;padding:5px}.note{padding:16px 20px;background:#edf4f5;border-left:3px solid #84b3be;font-size:13px;margin:24px 0}.note p{margin:8px 0 0}.check{display:flex;gap:9px;align-items:flex-start;font-size:13px;line-height:1.65;margin:16px 0}.full{width:100%;margin:8px 0}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.workspace-heading h1{font-size:26px}.toolbar{flex-shrink:0}.toolbar span{color:var(--muted);font-size:13px}.work-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:24px;align-items:start}.page-rail{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto;padding-right:5px}.rail-overall{width:100%;justify-content:flex-start}.rail-page{display:flex;border:1px solid transparent;border-bottom-color:var(--line);min-height:60px}.rail-page.active,.rail-overall.active{background:#e0eff1;border-color:#a9cdd3;border-radius:5px}.page-select{flex:1;min-width:0;border:0;background:transparent;text-align:left;justify-content:flex-start;padding:12px 8px;word-break:break-word}.page-select span{font-size:12px;align-self:flex-start;color:var(--teal);min-width:22px;padding-top:3px}.move-buttons{display:flex;flex-direction:column;justify-content:center}.move-buttons button{font-size:13px;padding:0 6px;border:0;min-height:24px;background:transparent}.generation-actions{border-top:1px solid var(--line);margin-top:24px;padding-top:14px}.editor>.section-head{margin-top:0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.source-details{border-bottom:1px solid var(--line);margin-bottom:24px;padding-bottom:18px}summary{cursor:pointer;font-size:13px;color:#426773;padding:7px 0}details[open]>summary{margin-bottom:12px}.group-title{border-top:1px solid var(--line);padding-top:26px;margin-top:30px;color:var(--teal)}.content-block{border-left:3px solid #b6d4d9;padding:8px 0 16px 18px;margin:18px 0}.inline-controls{display:flex;gap:18px;align-items:center;flex-wrap:wrap;font-size:13px}.inline-controls label{display:flex;align-items:center;gap:8px}.inline-controls select{width:145px;padding:6px}.inline-controls .check{margin:0}.teacher-zone{padding:22px;background:#f0f2f6;border-left:3px solid #a6b6c8;border-radius:0 6px 6px 0}.teacher-zone>b{display:block;margin-bottom:16px}.outline-row,.reveal-edit{border-bottom:1px solid var(--line);padding:12px 0}.run-item{display:flex;flex-direction:column;gap:7px;margin:10px 0;font-size:12px}.generation-status{background:#e1f0f2;padding:16px 24px;border-radius:6px;margin-bottom:20px;font-size:14px}.generation-status[hidden]{display:none}.preview-toolbar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.preview-toolbar .check{margin:0}.preview-toolbar>a:last-child{margin-left:auto}.preview-overall{margin:25px 0}.preview-field{margin:16px 0}.preview-field strong{font-size:13px;color:#506d78}.preview-field p{white-space:pre-wrap;overflow-wrap:anywhere;margin:5px 0;font-size:14px}.preview-pages{display:grid;gap:24px}.preview-page>.section-head{margin-top:0}.preview-columns{display:grid;grid-template-columns:1.15fr 1fr;gap:26px;align-items:start}.student-screen{background:#eaf3f5;border:1px solid #bcd6dc;padding:24px;border-radius:6px;min-height:120px}.screen-label{font-size:12px;color:var(--teal);font-weight:700;letter-spacing:1px}.student-screen p{font-size:17px;white-space:pre-wrap;margin:20px 0 6px}.reveal-list>div{padding:12px 0 12px 18px;border-left:2px solid #c2d9de;margin:18px 0}.reveal-list h4{margin:0;color:var(--teal)}.reveal-list p{white-space:pre-wrap}.instruction-panel{margin-top:28px}.instruction-panel textarea{font-size:13px;background:#f8fafb;width:100%;min-height:260px}.warning{color:#8f4932;background:#fff0e6;border-left:3px solid #d79d76;padding:12px 16px;font-size:14px}.test-banner{background:#f0e7cf;color:#69541c;text-align:center;padding:7px;font-size:12px}#notice{display:none}#notice.visible{display:block;position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#174f5a;color:white;padding:13px 22px;border-radius:6px;max-width:min(90%,800px);box-shadow:0 4px 20px #173f4a30;z-index:20;font-size:14px}#notice.error{background:#8e4334}
@media(max-width:900px){main{padding:26px 20px 90px}.work-layout{grid-template-columns:215px minmax(0,1fr);gap:16px}.panel{padding:20px}.import-layout,.source-layout{grid-template-columns:minmax(0,1fr) 290px}.workspace-heading{align-items:flex-start;flex-direction:column}.two-col{grid-template-columns:1fr}.preview-columns{grid-template-columns:1fr}.row-actions{flex-wrap:wrap}.history-row{gap:12px}.status-chip{max-width:200px}}
@media(max-width:620px){header{padding:15px 20px}.brand span{display:none}.brand b{font-size:19px}h1{font-size:25px}.import-layout,.source-layout,.work-layout{grid-template-columns:1fr}.start-strip{flex-direction:column;align-items:flex-start;padding:23px}.page-rail{position:static;max-height:none;padding:0}#page-list{max-height:220px;overflow:auto}.generation-actions{margin-top:16px}.generation-actions .full{width:auto;margin-right:6px}.history-row{flex-wrap:wrap}.history-meta{width:calc(100% - 70px)}.history-row>.status-chip{margin-left:60px}.row-actions{width:100%;margin-left:60px}.toolbar{flex-wrap:wrap}.workspace-heading h1{font-size:24px}.preview-toolbar{align-items:flex-start;flex-direction:column}.preview-toolbar>a:last-child{margin-left:0}.preview-page .section-head{align-items:flex-start;flex-direction:column}.panel{padding:18px}.inline-controls{gap:10px}.field select{max-width:100%}.preview-field p{word-break:break-word}}