:root{--ink:#15213b;--muted:#64748b;--line:#dce5f2;--paper:#fff;--bg:#f3f6fb;--primary:#5946e8;--teal:#178b82;--danger:#c73535;--ok:#18864b}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif}.hero{display:flex;justify-content:space-between;align-items:center;padding:24px 38px;color:#fff;background:linear-gradient(120deg,#111a32,#3f2b89)}.hero small{letter-spacing:.12em}.hero h1{margin:3px 0;font-size:30px}.hero p{margin:0;color:#dbe1ff}.ghost,.hero a{color:#fff;text-decoration:none;border:1px solid #ffffff55;border-radius:10px;padding:9px 15px}main{display:grid;grid-template-columns:320px minmax(0,1fr);gap:18px;padding:18px;max-width:1600px;margin:auto}.course-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;align-self:start;position:sticky;top:18px;max-height:calc(100vh - 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p{margin:2px 0;color:var(--muted)}label{display:grid;gap:6px;font-weight:650;margin-bottom:12px}input,select,textarea{width:100%;border:1px solid #ced9e8;border-radius:10px;padding:11px 12px;background:#fff;color:var(--ink);font:inherit}textarea{resize:vertical}.grid{display:grid;gap:12px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.bank-grid{grid-template-columns:minmax(240px,1fr) auto auto auto}.hint{padding:11px 13px;background:#f4f7fb;border-radius:10px;color:var(--muted);margin-bottom:12px}.hint.ok{background:#e6f8ed;color:var(--ok)}.hint.error{background:#fff0f0;color:var(--danger)}.upload-drop{display:grid;gap:5px;border:2px dashed #b9c8dc;border-radius:14px;padding:20px;text-align:center;background:#f8fbff}.upload-drop input{border:0;padding:0}.upload-drop span{color:var(--muted)}.upload-queue,.material-list{display:grid;gap:8px;margin:12px 0}.upload-item,.material-item{display:grid;grid-template-columns:minmax(0,1fr) 150px auto;align-items:center;gap:10px;border:1px solid var(--line);border-radius:11px;padding:10px}.progress{height:8px;background:#e9edf5;border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;background:var(--teal);width:0}.muted{color:var(--muted)}.check-results{margin-top:12px}.check-row{padding:9px 12px;border-radius:9px;margin-top:7px}.check-row.ok{background:#e7f7ed;color:var(--ok)}.check-row.error{background:#fff0f0;color:var(--danger)}dialog{width:min(820px,92vw);max-height:86vh;border:0;border-radius:16px;padding:0;box-shadow:0 24px 80px #0f172a55}dialog::backdrop{background:#11182799}.modal-head{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid 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