:root{
  --bg:#f6f7f9; --card:#fff; --line:#e5e7eb; --ink:#111827; --muted:#6b7280;
  --brand:#d2191a; --brand-soft:#fdecec; --ok:#047857; --ok-soft:#ecfdf5;
  --warn:#b45309; --warn-soft:#fffbeb; --err:#b91c1c; --err-soft:#fef2f2;
  --radius:10px; --shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.1);
}
*{box-sizing:border-box}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:14px/1.65 "PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Noto Sans Math","Noto Sans Symbols 2","Noto Sans Symbols",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- 顶栏 ---------- */
.topbar{
  display:flex;align-items:center;gap:22px;padding:0 22px;height:56px;
  background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;color:var(--ink);letter-spacing:.3px}
.brand img{height:26px;width:26px;display:block}
.brand:hover{text-decoration:none}
.nav{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.nav a{
  padding:6px 11px;border-radius:7px;color:#374151;font-size:13.5px;white-space:nowrap;
}
.nav a:hover{background:#f3f4f6;text-decoration:none}
.nav a.on{background:var(--brand-soft);color:var(--brand);font-weight:600}
.dot{
  display:inline-block;margin-left:5px;min-width:17px;padding:0 5px;border-radius:9px;
  background:var(--err);color:#fff;font-size:11px;line-height:17px;text-align:center;font-weight:600;
}
.who{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--muted)}
.who .name{color:var(--ink);font-weight:500}
.role{padding:1px 7px;border-radius:5px;font-size:11px;background:#f3f4f6;color:#4b5563}
.role-admin{background:#fef3c7;color:#92400e}
.role-reviewer{background:#e0f2fe;color:#075985}
.quit{color:var(--muted);font-size:12.5px}

/* ---------- 布局 ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:22px 22px 60px}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:6px 0 18px;flex-wrap:wrap}
.page-head h1{margin:0;font-size:20px;letter-spacing:.2px}
.page-head .sub{color:var(--muted);font-size:13px;margin-top:2px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.card + .card{margin-top:16px}
.grid{display:grid;gap:14px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:860px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}}
.muted{color:var(--muted)}
.small{font-size:12.5px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}

/* ---------- 指标卡 ---------- */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:15px 16px;box-shadow:var(--shadow)}
.stat .k{color:var(--muted);font-size:12.5px}
.stat .v{font-size:26px;font-weight:700;line-height:1.25;margin-top:3px;font-variant-numeric:tabular-nums}
.stat .v.warn{color:var(--warn)}
.stat .v.err{color:var(--err)}
.stat .v.ok{color:var(--ok)}

/* ---------- 表格 ---------- */
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid #f0f1f3;vertical-align:top}
th{font-size:12.5px;color:var(--muted);font-weight:600;background:#fafafa;white-space:nowrap}
tbody tr:hover{background:#fafbff}
td.num{font-variant-numeric:tabular-nums}
.stem-cell{max-width:620px;white-space:pre-wrap;word-break:break-word}
.stem-cell .opts{margin-top:4px;color:#4b5563}

/* ---------- 标签 ---------- */
.tag{display:inline-block;padding:1px 8px;border-radius:6px;font-size:12px;background:#f3f4f6;color:#4b5563;white-space:nowrap}
.tag-sub{background:var(--brand-soft);color:var(--brand)}
.tag-ok{background:var(--ok-soft);color:var(--ok)}
.tag-warn{background:var(--warn-soft);color:var(--warn)}
.tag-err{background:var(--err-soft);color:var(--err)}
.tag-line{background:#fff;border:1px solid var(--line)}
.tags{display:flex;gap:6px;flex-wrap:wrap}
.diff{letter-spacing:1px;color:#d97706;font-size:12px}
.diff .off{color:#e5e7eb}

/* ---------- 表单 ---------- */
label{display:block;font-size:12.5px;color:#374151;margin-bottom:5px;font-weight:500}
input[type=text],input[type=password],input[type=number],input[type=file],select,textarea{
  width:100%;padding:8px 10px;border:1px solid #d1d5db;border-radius:8px;background:#fff;
  font:inherit;color:var(--ink);
}
input:focus,select:focus,textarea:focus{outline:2px solid #c7d2fe;border-color:#a5b4fc}
textarea{resize:vertical;min-height:90px;line-height:1.6}
.field{margin-bottom:14px}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row > .field{flex:1;min-width:170px}
.form-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.hint{color:var(--muted);font-size:12px;margin-top:5px}

button,.btn{
  display:inline-block;padding:8px 15px;border-radius:8px;border:1px solid #d1d5db;background:#fff;
  color:var(--ink);font:inherit;font-size:13.5px;cursor:pointer;line-height:1.4;
}
button:hover,.btn:hover{background:#f9fafb;text-decoration:none}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.btn-primary:hover{background:#b31516}
.btn-ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn-danger{background:#fff;border-color:#fca5a5;color:var(--err)}
.btn-sm{padding:4px 10px;font-size:12.5px}
.btn[disabled],button[disabled]{opacity:.55;cursor:not-allowed}

/* ---------- 提示条 ---------- */
.flash-wrap{margin-bottom:14px;display:grid;gap:8px}
.flash{padding:9px 13px;border-radius:8px;font-size:13.5px;border:1px solid}
.flash-ok{background:var(--ok-soft);border-color:#a7f3d0;color:#065f46}
.flash-error{background:var(--err-soft);border-color:#fecaca;color:#991b1b}
.flash-info{background:#eff6ff;border-color:#bfdbfe;color:#1e40af}

/* ---------- 登录 ---------- */
.auth-wrap{max-width:400px;margin:9vh auto;padding:0 20px}
.auth-card{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 30px rgba(16,24,40,.08);padding:30px}
.auth-card h1{margin:0 0 4px;font-size:20px}
.auth-card .sub{color:var(--muted);font-size:13px;margin-bottom:22px}

/* ---------- 题目详情 ---------- */
.q-stem{font-size:15px;line-height:1.85;white-space:pre-wrap;word-break:break-word}
.opts-list{list-style:none;padding:0;margin:12px 0 0;display:grid;gap:6px}
.opts-list li{padding:6px 10px;background:#f9fafb;border:1px solid #f0f1f3;border-radius:7px}
.answer-box{background:var(--ok-soft);border:1px solid #a7f3d0;border-radius:9px;padding:13px 15px;white-space:pre-wrap}
.answer-box.empty{background:#fafafa;border-color:var(--line);color:var(--muted)}
.sim-item{border:1px solid var(--line);border-radius:9px;padding:10px 12px;margin-bottom:9px;background:#fff}
.sim-head{display:flex;align-items:center;gap:9px;margin-bottom:5px}
.score{font-weight:700;font-variant-numeric:tabular-nums}

/* ---------- 进度 ---------- */
.progress{height:7px;background:#eef0f3;border-radius:99px;overflow:hidden;margin-top:9px}
.progress > i{display:block;height:100%;width:0;background:var(--brand);transition:width .25s}
.job-line{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:13px}

/* ---------- 其他 ---------- */
.empty{text-align:center;color:var(--muted);padding:34px 10px;font-size:13.5px}
.toast{
  position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);opacity:0;pointer-events:none;
  background:#111827;color:#fff;padding:10px 16px;border-radius:9px;font-size:13.5px;max-width:80vw;
  transition:all .25s;z-index:99;
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.pager{display:flex;gap:6px;align-items:center;justify-content:center;margin-top:16px;flex-wrap:wrap}
.pager a,.pager span{padding:5px 10px;border-radius:7px;border:1px solid var(--line);background:#fff;font-size:13px}
.pager span.cur{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------- 公式图片（Word 里的 OLE 公式/图形） ---------- */
.eq{
  max-height:2.4em;max-width:100%;vertical-align:-0.42em;margin:0 1px;
  display:inline-block;
}
.opts-list .eq{max-height:2.2em;vertical-align:-0.4em}
.answer-box .eq{max-height:2.6em}
.eq-miss{color:#9ca3af;font-size:12px;background:#f3f4f6;border-radius:4px;padding:0 4px}
.q-stem img.eq{background:#fff}

/* ---------- 原卷版面（贴近 Word 的阅读视图） ---------- */
.doc-page{
  background:#fff;border:1px solid var(--line);border-radius:10px;
  box-shadow:0 2px 10px rgba(16,24,40,.06);
  max-width:820px;margin:0 auto;padding:56px 64px 72px;
  font-family:"Songti SC","SimSun","PingFang SC","Noto Sans Math","Noto Sans Symbols 2",serif;
  font-size:15.5px;line-height:2.0;color:#111;
  word-break:break-word;
}
.doc-page .doc-p{margin:0 0 .55em;white-space:normal}
.doc-page .doc-p.doc-empty{margin:0;line-height:1.4}
.doc-page .doc-math{font-family:"Times New Roman","Noto Sans Math","Noto Sans Symbols 2",serif;font-style:italic}
.doc-page .doc-img{
  max-height:3.1em;max-width:100%;vertical-align:-0.42em;margin:0 1px;
}
.doc-page .doc-table{border-collapse:collapse;margin:.6em 0;width:100%}
.doc-page .doc-table td{border:1px solid #d1d5db;padding:4px 8px;font-size:.94em;vertical-align:top}
.doc-page .doc-table p{margin:0}

@media print{
  .topbar,.page-head,.flash-wrap{display:none!important}
  .wrap{max-width:none;padding:0}
  .doc-page{border:0;box-shadow:none;margin:0;padding:0;max-width:none}
}
.doc-page .doc-figure{
  display:block;margin:10px auto;max-width:88%;height:auto;
}

.sources{margin:10px 0 2px;font-size:12.5px;background:#fafafa;border:1px solid var(--line);border-radius:8px;padding:8px 12px}
.sources summary{cursor:pointer;color:#4b5563}
.sources ol{margin:8px 0 0;padding-left:18px;line-height:1.7}
.sources li{margin-bottom:6px}

.alt-box{margin-top:10px;border:1px dashed #fca5a5;background:#fff7f7;border-radius:9px;padding:10px 12px}
.alt-head{font-size:13px;color:#991b1b;margin-bottom:4px}

/* ---------- 组卷与打印 ---------- */
.print-q{margin:0 0 1.6em}
.print-stem{line-height:2.0}
.print-score{color:#555;font-weight:400;font-size:.9em}
.print-opts{display:grid;grid-template-columns:1fr 1fr;gap:2px 18px;margin-top:4px;padding-left:1.6em}
.print-opt{line-height:1.9}
@media (max-width:700px){.print-opts{grid-template-columns:1fr}}
@media print{
  .no-print{display:none!important}
  .doc-page{padding:0}
  .print-q{page-break-inside:avoid}
}
.dot-cart{background:var(--brand)}

.warn-box{background:var(--warn-soft);border:1px solid #fcd34d;border-radius:9px;padding:10px 14px;margin-bottom:10px;font-size:13px}
.warn-box ul{margin:6px 0;padding-left:18px}
.warn-box li{margin-bottom:3px}

/* ---------- 左右对照 ---------- */
.diff-summary{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:10px}
.diff-wrap{border:1px solid var(--line);border-radius:10px;overflow:auto;max-height:66vh;background:#fff}
.diff-table{width:100%;border-collapse:collapse;table-layout:fixed}
.diff-table th{position:sticky;top:0;background:#fafafa;z-index:2;border-bottom:1px solid var(--line)}
.diff-cell{
  font-family:ui-monospace,Menlo,monospace;font-size:12.8px;line-height:1.85;
  padding:2px 10px;vertical-align:top;white-space:pre-wrap;word-break:break-word;
  border-bottom:1px solid #f3f4f6;border-right:1px solid #f3f4f6;
}
.diff-cell.right{border-right:0;background:#fcfffc}
tr.row-changed .diff-cell.left{background:#fff7f7}
tr.row-changed .diff-cell.right{background:#f4fff4}
.diff-cell del.d{background:#fecaca;color:#7f1d1d;text-decoration:none;border-radius:3px;padding:0 1px}
.diff-cell ins.i{background:#bbf7d0;color:#065f46;text-decoration:none;border-radius:3px;padding:0 1px}
.raw-preview{
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 16px;
  font-family:ui-monospace,Menlo,monospace;font-size:12.8px;line-height:1.8;
  white-space:pre-wrap;max-height:56vh;overflow:auto;
}
.edit-box{margin-top:16px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 16px}
.edit-box summary{cursor:pointer;color:#374151;font-weight:500;font-size:13.5px}
.edit-box textarea{margin-top:12px}

/* ---------- 上传页：拖拽区 + 队列 ---------- */
.dropzone{
  position:relative;border:2px dashed #cfd6e4;border-radius:14px;background:#fbfcff;
  padding:30px 20px;text-align:center;cursor:pointer;transition:.15s ease;
}
.dropzone:hover{border-color:#93a4c7;background:#f5f8ff}
.dropzone.dragover{border-color:#2f5bd7;background:#eef3ff;box-shadow:0 0 0 4px rgba(47,91,215,.08)}
.dropzone input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}
.dz-icon{font-size:26px;line-height:1;color:#2f5bd7;margin-bottom:8px}
.dz-main{font-size:15px;font-weight:500;color:#1f2937}
.dz-hint{margin-top:6px;font-size:12.5px;color:#6b7280}
.queue-file{font-size:12.8px;word-break:break-all}
.queue-row td{vertical-align:top}
.status-pending{color:#6b7280}
.status-running{color:#1d4ed8}
.status-ok{color:#047857}
.status-error{color:#b91c1c}

.mini{
  width:100%;padding:5px 8px;font-size:12.8px;border:1px solid var(--line);
  border-radius:8px;background:#fff;
}
.mini.need{border-color:#fca5a5;background:#fff7f7;box-shadow:0 0 0 2px rgba(239,68,68,.07)}
.mini:focus{outline:none;border-color:#2f5bd7;box-shadow:0 0 0 3px rgba(47,91,215,.10)}

/* 概览：学科行可点 */
tr.subj-row{cursor:pointer}
tr.subj-row:hover td{background:#f6f9ff}
tr.subj-row.active td{background:#eef3ff}
tr.subj-row.active td:first-child{font-weight:600;color:#1d4ed8}

/* 概览：统计卡可点 */
a.stat{display:block;color:inherit;text-decoration:none;transition:.15s ease}
a.stat:hover{box-shadow:0 4px 14px rgba(20,40,80,.10);transform:translateY(-1px)}
a.stat .k{color:#4b5563}
a.subj-link{color:inherit;text-decoration:none;border-bottom:1px dashed #c3cbd9}
a.subj-link:hover{color:#1d4ed8;border-color:#1d4ed8}

/* 任务面板 / 授权 / 终端替身 */
.status-pill { display:inline-block; padding:2px 10px; border-radius:10px; font-size:12px; font-weight:600; }
.status-pending { background:#fef3c7; color:#92400e; }
.status-progress { background:#dbeafe; color:#1e40af; }
.status-done { background:#dcfce7; color:#166534; }
.status-error { background:#fee2e2; color:#991b1b; }
.bar { height:8px; border-radius:4px; background:#e2e8f0; overflow:hidden; }
.bar-fill { height:100%; background:#3b82f6; transition:width .4s; }
.result-box { background:#f8fafc; border:1px solid #e2e8f0; border-radius:6px; padding:10px; max-height:220px; overflow:auto; white-space:pre-wrap; word-break:break-all; font-size:12px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

/* 答案截图校验 */
.ans-img { margin-top: 12px; border: 1px solid #e2e8f0; border-radius: 10px; padding: 10px 12px; background: #f8fafc; }
.ans-img-head { font-size: 13px; margin-bottom: 8px; }
.ans-img-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.ans-img-actions input[type=file] { display: none; }
.ans-img-list { margin-top: 8px; }
.ans-item { display: flex; gap: 10px; padding: 8px 0; border-top: 1px dashed #e2e8f0; }
.ans-thumb { width: 96px; height: 96px; object-fit: cover; border-radius: 8px; border: 1px solid #e2e8f0; background: #fff; }
.ans-item-body { flex: 1; min-width: 0; font-size: 12.5px; }
.ans-extracted { margin: 4px 0; white-space: pre-wrap; color: #1f2937; background: #fff; border: 1px solid #eef2f7; border-radius: 6px; padding: 6px 8px; max-height: 120px; overflow: auto; }
.ans-item-actions { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
.ans-badge { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px; }
.ans-badge.pending { background: #fdecec; color: #b31516; }
.ans-badge.ok { background: #dcfce7; color: #15803d; }
.ans-badge.bad { background: #fee2e2; color: #b91c1c; }
.ans-badge.warn { background: #fef3c7; color: #b45309; }
.ans-badge.error { background: #f1f5f9; color: #64748b; }
.modal-mask { position: fixed; inset: 0; background: rgba(15,23,42,.45); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal-box { background: #fff; border-radius: 12px; padding: 16px 18px; width: min(360px, 92vw); box-shadow: 0 10px 30px rgba(15,23,42,.25); }
.modal-head { display: flex; justify-content: space-between; align-items: center; font-weight: 600; }


/* MathJax 排版（公式用 LaTeX 渲染，SVG 输出） */
mjx-container { font-size: 1.03em; }
mjx-container svg { max-width: 100%; }
.q-stem mjx-container, .doc-page mjx-container { vertical-align: -0.05em; }
@media print { mjx-container { font-size: 1em; } }

/* ---------- 试卷版式（密封线 / 注意事项 / 留白 / 答题卡） ---------- */
.layout-bar { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; padding: 12px 16px; }
.layout-bar .chk { display: inline-flex; align-items: center; gap: 6px; margin: 0; font-size: 13px; color: #374151; font-weight: 500; }
.layout-bar input[type=checkbox] { width: auto; margin: 0; }
.layout-bar select { width: auto; padding: 4px 8px; font-size: 13px; }

.exam-sheet, .answer-sheet {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 2px 10px rgba(16,24,40,.06);
  max-width: 820px; margin: 0 auto 18px; padding: 52px 60px 64px;
  font-family: "Songti SC", "SimSun", "Noto Sans Math", "Noto Sans Symbols 2", serif;
  font-size: 15.5px; line-height: 1.95; color: #111;
  word-break: break-word;
}
.exam-sheet.with-seal { padding-left: 118px; }
.seal-band {
  position: absolute; left: 0; top: 52px; bottom: 52px; width: 84px;
  border-right: 1px dashed #b8bfcc;
  writing-mode: vertical-rl; text-orientation: mixed;
  display: flex; align-items: center; justify-content: flex-start; gap: 26px;
  padding-top: 26px; font-size: 12.5px; color: #4b5563; letter-spacing: 1px;
}
.seal-band .seal-line { color: #9ca3af; letter-spacing: 6px; }

.exam-brand{display:flex;align-items:center;justify-content:center;gap:5px;
  font-size:10.5px;letter-spacing:.22em;color:#9ca3af;margin:0 0 8px}
.exam-brand img{height:15px;width:15px;opacity:.85}
.exam-title { margin: 0 0 6px; text-align: center; font-size: 21px; letter-spacing: 1px; }
.exam-sub { margin: 0 0 4px; text-align: center; color: #555; font-size: 14px; }
.exam-info { margin: 0 0 18px; text-align: center; color: #444; font-size: 14px; }
.exam-notes {
  border: 1px solid #d8dde6; background: #fafbfd; border-radius: 8px;
  padding: 10px 16px; margin: 0 0 20px; font-size: 13px; line-height: 1.8;
}
.exam-notes ol { margin: 4px 0 0; padding-left: 20px; }
.exam-notes li { margin-bottom: 2px; }
.exam-questions .print-q { page-break-inside: avoid; }
.blank-space { width: 100%; }

.answer-sheet { page-break-before: always; }
.ans-block { margin-bottom: 16px; }
.ans-block-title { font-weight: 700; margin: 6px 0 10px; font-size: 15px; }
.ans-choice-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px 18px; }
.ans-choice { display: flex; align-items: center; gap: 6px; font-size: 14px; }
.ans-choice b { min-width: 22px; text-align: right; }
.bubble {
  width: 21px; height: 21px; border: 1px solid #9aa3b2; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center; font-size: 11px; color: #6b7280;
}
.ans-zone {
  position: relative; border: 1px solid #d6dbe4; border-radius: 6px; margin: 0 0 10px;
  min-height: 5.4cm; padding: 0;
  background-image: repeating-linear-gradient(transparent, transparent 30px, #eef1f6 31px);
  background-position: 0 26px;
}
.ans-zone .ans-no { position: absolute; left: 8px; top: 2px; font-weight: 600; font-size: 13px; }

@media print {
  @page { size: A4; margin: 15mm 13mm 14mm; }
  .no-print { display: none !important; }
  .exam-sheet, .answer-sheet {
    border: 0; box-shadow: none; border-radius: 0; margin: 0; padding: 0; max-width: none;
    font-size: 10.5pt; line-height: 1.9;
  }
  .exam-sheet.with-seal { padding-left: 22mm; }
  .seal-band { top: 0; bottom: 0; width: 19mm; left: 0; padding-top: 6mm; gap: 6mm; font-size: 9pt; }
  .exam-title { font-size: 15pt; }
  .exam-notes { font-size: 9pt; }
  .answer-sheet { page-break-before: always; }
  .ans-zone { min-height: 4.6cm; }
}

/* ---------- 手机端 ---------- */
@media (max-width:760px){
  .topbar{height:auto;padding:8px 12px;gap:6px 10px;flex-wrap:wrap;align-items:center}
  .brand{font-size:15.5px;gap:6px}
  .brand img{height:23px;width:23px}
  .who{margin-left:auto;font-size:12px;gap:6px}
  .who .name{max-width:88px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .role{font-size:10.5px;padding:1px 6px}
  .nav{flex:1 0 100%;min-width:0;max-width:100%;order:3;flex-wrap:nowrap;
       overflow-x:auto;overflow-y:hidden;gap:2px;padding:2px 0;
       -webkit-overflow-scrolling:touch;scrollbar-width:none}
  .nav::-webkit-scrollbar{display:none}
  .nav a{flex:0 0 auto;padding:8px 10px;font-size:13px;border-radius:8px}
  .wrap{padding:14px 12px 48px}
  .page-head{margin:0 0 14px;gap:10px}
  .page-head h1{font-size:19px}
  .page-head .sub{font-size:12.5px}
  .card{padding:14px}
  .card + .card{margin-top:12px}
  .grid{gap:10px}
  .stat{padding:12px 13px}
  .stat .v{font-size:22px}
  .row > .field{min-width:100%}
  .form-actions{gap:8px}
  .table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:8px;max-width:100%}
  .table-scroll table{min-width:0}
  .table-scroll th,.table-scroll td{white-space:nowrap}
  .q-stem{font-size:15px}
  .eq{max-width:min(72vw,280px)}
}

/* grid/flex 子项允许收缩，否则表格会把整页撑宽 */
.grid > *{min-width:0}
.card{min-width:0}
.table-scroll{min-width:0}

/* 手机端筛选默认收起 */
.filter-toggle{display:none}
@media (max-width:760px){
  .filter-toggle{display:block;width:100%;margin-bottom:10px;padding:10px 12px;
    background:#f3f4f6;border:1px solid var(--line);border-radius:8px;font-size:14px;color:#374151}
  .filters .filter-body{display:none}
  .filters.open .filter-body{display:block}
  .eq-miss{white-space:nowrap}
}

/* 手机端题库列表：隐藏 ID 和考点两列，把宽度让给题目 */
@media (max-width:760px){
  .q-table th:nth-child(1), .q-table td:nth-child(1),
  .q-table th:nth-child(6), .q-table td:nth-child(6){display:none}
  /* 题库列表在手机上改成卡片式：题目独占一行 */
  .q-table{display:block;width:100%}
  .q-table thead{display:none}
  .q-table tbody{display:block}
  .q-table tr{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px;
    padding:12px;border-bottom:1px solid var(--line)}
  .q-table td{display:block;border:0;padding:0;width:auto!important;
    white-space:normal;vertical-align:middle}
  .q-table td:nth-child(5){flex:1 0 100%;order:5;line-height:1.65}
  .q-table td:nth-child(7){order:6}
  .q-table td:nth-child(8){order:7;margin-left:auto}
}

/* 手机端试卷列表：卡片式 */
@media (max-width:760px){
  .p-table thead{display:none}
  .p-table tbody{display:block}
  .p-table tr{display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px;
    padding:12px;border-bottom:1px solid var(--line)}
  .p-table td{display:block;border:0;padding:0;width:auto!important;white-space:normal;vertical-align:middle}
  .p-table td:nth-child(1){flex:1 0 100%;font-size:14.5px;line-height:1.6}
  .p-table td:nth-child(6){flex:1 0 100%;color:var(--muted);font-size:12.5px}
  .p-table td:nth-child(7){flex:1 0 100%;color:var(--muted);font-size:12px}
}

/* 阅读材料 */
.passage-box{background:#f8fafc;border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:8px;padding:12px 14px;margin-bottom:14px}
.passage-label{font-size:12px;color:var(--muted);margin-bottom:6px;letter-spacing:.5px}
.passage-text{font-size:14px;line-height:1.85;white-space:pre-wrap;word-break:break-word}
.print-passage{border:1px solid #d1d5db;border-radius:6px;padding:10px 12px;margin:10px 0 6px;
  font-size:.95em;line-height:1.8;white-space:pre-wrap;page-break-inside:avoid}

/* 题目/选项用宋体排版，和公式图片（Times/宋体）保持一致 */
.q-stem, .opts-list, .passage-text, .answer-box{
  font-family:"Songti SC","STSong","SimSun","Noto Sans Math","Noto Sans Symbols 2",serif;
}
.q-stem .eq, .opts-list .eq{vertical-align:-0.35em}

/* 公式图：行内小公式按行高缩放；整行大公式（带箭头/分数）放宽 */
img.eq.eq-sm{height:1.55em !important;max-height:1.55em;width:auto;vertical-align:-0.28em}
img.eq.eq-inline{height:1.35em !important;max-height:1.35em;width:auto;vertical-align:-0.26em}
img.eq.eq-frac{height:1.9em !important;max-height:1.9em;width:auto;vertical-align:-0.48em}
img.eq.eq-block{max-height:2em;height:auto;width:auto;vertical-align:-0.2em}
img.eq.eq-wide{max-height:3.2em;height:auto;width:auto;vertical-align:-0.15em}
img.fig{display:block;max-width:100%;max-height:210px;width:auto;height:auto;margin:10px 0;border-radius:6px}

/* 打印：插图别太大，一题一页里放得下 */
@media print {
  img.fig { max-height: 150px !important; max-width: 55% !important; }
  img.eq.eq-block { max-height: 2em !important; }
  img.eq.eq-inline { height: 1.9em !important; max-height: 1.9em !important; }
}

/* 打印预览页（.paper）里插图收小，和实际打印一致 */
.exam-sheet img.fig { max-height: 150px; max-width: 55%; }
.exam-sheet img.eq.eq-block { max-height: 2em; }

/* ---------- 品牌 ---------- */
.auth-card .auth-logo{display:block;width:100%;max-width:260px;margin:0 auto 4px}

/* 列表里的题干是链接，但正文仍用墨色，只有悬停才变品牌色 */
.stem-cell a, .q-stem a, td a.q-link{color:var(--ink)}
.stem-cell a:hover, .q-stem a:hover, td a.q-link:hover{color:var(--brand);text-decoration:none}

/* 试卷列表标题也用墨色，别整屏红字 */
.p-table td a:not(.btn){color:var(--ink)}
.p-table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 概览页「最近上传」等列表标题也用墨色 */
.card table td a:not(.btn){color:var(--ink)}
.card table td a:not(.btn):hover{color:var(--brand);text-decoration:none}
.panel table td a:not(.btn){color:var(--ink)}
.panel table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 卷面水印：只在打印时出现，固定在每页正中，浅到不影响阅读 */
/* 打印预览页（.paper）里插图收小，和实际打印一致 */
.exam-sheet img.fig { max-height: 150px; max-width: 55%; }
.exam-sheet img.eq.eq-block { max-height: 2em; }

/* ---------- 品牌 ---------- */
.auth-card .auth-logo{display:block;width:100%;max-width:260px;margin:0 auto 4px}

/* 列表里的题干是链接，但正文仍用墨色，只有悬停才变品牌色 */
.stem-cell a, .q-stem a, td a.q-link{color:var(--ink)}
.stem-cell a:hover, .q-stem a:hover, td a.q-link:hover{color:var(--brand);text-decoration:none}

/* 试卷列表标题也用墨色，别整屏红字 */
.p-table td a:not(.btn){color:var(--ink)}
.p-table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 概览页「最近上传」等列表标题也用墨色 */
.card table td a:not(.btn){color:var(--ink)}
.card table td a:not(.btn):hover{color:var(--brand);text-decoration:none}
.panel table td a:not(.btn){color:var(--ink)}
.panel table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 打印预览页（.paper）里插图收小，和实际打印一致 */
.exam-sheet img.fig { max-height: 150px; max-width: 55%; }
.exam-sheet img.eq.eq-block { max-height: 2em; }

/* ---------- 品牌 ---------- */
.auth-card .auth-logo{display:block;width:100%;max-width:260px;margin:0 auto 4px}

/* 列表里的题干是链接，但正文仍用墨色，只有悬停才变品牌色 */
.stem-cell a, .q-stem a, td a.q-link{color:var(--ink)}
.stem-cell a:hover, .q-stem a:hover, td a.q-link:hover{color:var(--brand);text-decoration:none}

/* 试卷列表标题也用墨色，别整屏红字 */
.p-table td a:not(.btn){color:var(--ink)}
.p-table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 概览页「最近上传」等列表标题也用墨色 */
.card table td a:not(.btn){color:var(--ink)}
.card table td a:not(.btn):hover{color:var(--brand);text-decoration:none}
.panel table td a:not(.btn){color:var(--ink)}
.panel table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 卷面水印：只在打印时出现，固定在每页正中，浅到不影响阅读 */
/* 打印预览页（.paper）里插图收小，和实际打印一致 */
.exam-sheet img.fig { max-height: 150px; max-width: 55%; }
.exam-sheet img.eq.eq-block { max-height: 2em; }

/* ---------- 品牌 ---------- */
.auth-card .auth-logo{display:block;width:100%;max-width:260px;margin:0 auto 4px}

/* 列表里的题干是链接，但正文仍用墨色，只有悬停才变品牌色 */
.stem-cell a, .q-stem a, td a.q-link{color:var(--ink)}
.stem-cell a:hover, .q-stem a:hover, td a.q-link:hover{color:var(--brand);text-decoration:none}

/* 试卷列表标题也用墨色，别整屏红字 */
.p-table td a:not(.btn){color:var(--ink)}
.p-table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 概览页「最近上传」等列表标题也用墨色 */
.card table td a:not(.btn){color:var(--ink)}
.card table td a:not(.btn):hover{color:var(--brand);text-decoration:none}
.panel table td a:not(.btn){color:var(--ink)}
.panel table td a:not(.btn):hover{color:var(--brand);text-decoration:none}

/* 卷面水印：固定在页面中心，默认每页都印；不影响阅读 */

/* 卷面水印：仅打印时出现，固定每页正中，浅到不影响阅读 */
.exam-watermark{display:none}
@media print{
  .exam-watermark{display:flex;position:fixed;inset:0;align-items:center;justify-content:center;
    pointer-events:none;z-index:9999;mix-blend-mode:multiply;opacity:.17}
  .exam-watermark img{width:44%;max-width:460px;height:auto}
}