/* ============================================================
   在线考试系统 — 全新 UI 设计
   设计语言：现代教育平台 / 精致靛蓝 / 柔和渐变 / 层级阴影
   保持所有 class 名不变，仅升级视觉表现
   ============================================================ */

/* ===== 0. 设计令牌（CSS 变量） ===== */
:root {
  --primary: #4f46e5;
  --primary-light: #6366f1;
  --primary-dark: #4338ca;
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;

  --success: #059669;
  --success-light: #10b981;
  --success-50: #ecfdf5;
  --success-100: #d1fae5;

  --warning: #d97706;
  --warning-light: #f59e0b;
  --warning-50: #fffbeb;
  --warning-100: #fef3c7;

  --danger: #dc2626;
  --danger-light: #ef4444;
  --danger-50: #fef2f2;
  --danger-100: #fee2e2;

  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-xs: 0 1px 2px rgba(15,23,42,.04);
  --shadow-sm: 0 1px 3px rgba(15,23,42,.06), 0 1px 2px rgba(15,23,42,.04);
  --shadow-md: 0 4px 6px -1px rgba(15,23,42,.08), 0 2px 4px -2px rgba(15,23,42,.05);
  --shadow-lg: 0 10px 15px -3px rgba(15,23,42,.08), 0 4px 6px -4px rgba(15,23,42,.05);
  --shadow-xl: 0 20px 25px -5px rgba(15,23,42,.10), 0 8px 10px -6px rgba(15,23,42,.05);
  --shadow-primary: 0 4px 14px rgba(79,70,229,.25);

  --font-sans: -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-serif: "Times New Roman", "宋体", SimSun, "Songti SC", "SimSun-ExtB", STSong, serif;
  --font-bold: "黑体", SimHei, "Microsoft YaHei", "Heiti SC", "Source Han Sans SC", sans-serif;
  --transition: .2s cubic-bezier(.4,0,.2,1);
}

/* ===== 1. 基础重置与全局 ===== */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--gray-50);
  color: var(--gray-800);
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99,102,241,.08), transparent),
    linear-gradient(180deg, var(--gray-50) 0%, var(--gray-100) 400px, var(--gray-100) 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== 2. 服务器离线提示 ===== */
.server-down {
  max-width: 620px;
  margin: 80px auto;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow-xl);
  border-top: 5px solid var(--danger);
}
.server-down h2 { margin-top: 0; color: var(--danger); font-size: 22px; }
.server-down ol { padding-left: 20px; line-height: 2; }
.server-down code {
  background: var(--gray-100); padding: 2px 8px; border-radius: var(--radius-sm); font-size: 13px;
  color: var(--primary);
}

/* ===== 3. 顶部导航栏 ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: 64px;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 50;
}
.brand {
  font-size: 19px;
  font-weight: 700;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -.01em;
}
.logo-img {
  height: 36px;
  width: auto;
  border-radius: var(--radius-sm);
}
.userbox { display: flex; align-items: center; gap: 12px; }
.userbox span { font-size: 14px; color: var(--gray-600); font-weight: 500; }
/* 顶部栏按钮 */
.topbar .btn {
  padding: 8px 18px;
  font-size: 14px;
  border: 1.5px solid var(--primary);
  color: var(--primary);
  background: transparent;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.topbar .btn:hover { background: var(--primary); color: #fff; }
.topbar .btn-ghost { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.topbar .btn-ghost:hover { background: var(--primary); color: #fff; }
.topbar .btn-primary { background: var(--primary); color: #fff; border: 1.5px solid var(--primary); }
.topbar .btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
#role-badge { background: var(--primary-50); color: var(--primary); border: 1px solid var(--primary-200); }

/* ===== 4. 容器与卡片 ===== */
.container { max-width: 860px; margin: 32px auto; padding: 0 20px; }
.card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}
.view { animation: fadeIn .3s ease; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ===== 5. 排版 ===== */
h2 {
  margin-top: 0;
  font-size: 24px;
  color: var(--gray-900);
  font-weight: 700;
  letter-spacing: -.02em;
  position: relative;
  padding-left: 16px;
}
h2:not(#exam-title)::before {
  content: '';
  position: absolute;
  left: 0; top: 4px; bottom: 4px;
  width: 5px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
}
h3 { margin-top: 28px; font-size: 17px; color: var(--gray-700); font-weight: 600; }
.muted { color: var(--gray-400); font-size: 14px; line-height: 1.6; }

/* ===== 6. 标签页 Tab ===== */
.tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.tab {
  flex: 1; padding: 12px; border: none; border-radius: var(--radius-sm);
  background: var(--gray-100); color: var(--gray-500); font-size: 15px; cursor: pointer;
  transition: var(--transition);
}
.tab.active {
  background: var(--primary); color: #fff; font-weight: 600;
  box-shadow: var(--shadow-primary);
}

/* ===== 7. 表单控件 ===== */
.auth-form { display: flex; flex-direction: column; gap: 14px; }
input, select, textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 15px;
  outline: none;
  transition: var(--transition);
  background: #fff;
  color: var(--gray-800);
  font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-100);
}
input::placeholder { color: var(--gray-400); }
select { cursor: pointer; }
textarea { font-family: monospace; resize: vertical; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; max-width: 440px; }
.field label { font-size: 14px; color: var(--gray-600); font-weight: 500; }
.field select { max-width: 440px; }
hr { border: none; border-top: 1px solid var(--gray-200); margin: 24px 0; }

/* ===== 8. 按钮 ===== */
.btn {
  padding: 11px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(79,70,229,.3); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}
.btn-ghost:hover { background: var(--gray-200); color: var(--gray-900); border-color: var(--gray-300); }
.btn-danger-text { background: var(--danger-50); color: var(--danger); }
.btn-danger-text:hover { background: var(--danger-100); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none !important; }

/* ===== 9. 消息提示 ===== */
.msg { min-height: 20px; margin: 4px 0 0; font-size: 14px; line-height: 1.5; }
.msg.err { color: var(--danger); }
.msg.ok { color: var(--success); }

/* ===== 10. 考试头部与计时器 ===== */
.exam-head { display: flex; align-items: center; justify-content: space-between; }
.timer {
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--warning-50), var(--warning-100));
  color: var(--warning);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .03em;
  border: 1px solid var(--warning-100);
}
.timer.warn {
  background: linear-gradient(135deg, var(--danger-50), var(--danger-100));
  color: var(--danger);
  border-color: var(--danger-100);
  animation: pulseWarn 1s infinite;
}
@keyframes pulseWarn { 50% { opacity: .55; } }
.exam-foot { margin-top: 28px; text-align: right; }
.pp-topbar { margin-bottom: 16px; }

/* ===== 11. 题目区域 ===== */
.question {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  margin-top: 18px;
  background: #fff;
  transition: var(--transition);
  font-family: var(--font-serif);
}
.question:hover { border-color: var(--primary-200); box-shadow: var(--shadow-sm); }
.question .q-title { font-weight: 600; margin-bottom: 14px; line-height: 1.7; }
.q-tag { font-size: 12px; padding: 3px 10px; border-radius: 6px; margin-right: 8px; font-weight: 600; font-family: var(--font-sans); }
.tag-multi { background: var(--primary-50); color: var(--primary); }
.tag-blank { background: var(--success-50); color: var(--success); }
.option {
  display: flex; align-items: flex-start; gap: 10px; padding: 10px 0;
  cursor: pointer; transition: var(--transition);
  border-radius: var(--radius-sm);
  padding-left: 8px; padding-right: 8px;
}
.option:hover { background: var(--gray-50); }
.option input { width: 18px; height: 18px; margin-top: 2px; }
.option-text { line-height: 1.6; }
.blank-input { width: 100%; margin-top: 8px; font-family: var(--font-sans); }
.q-image { margin: 10px 0; }
.q-image img { max-width: 100%; max-height: 280px; border: 1px solid var(--gray-200); border-radius: var(--radius-sm); }
.q-image.figure { margin: 12px 0; }
.q-image.figure img { display: block; }
.q-formula { display: inline-block; max-width: 100%; vertical-align: middle; background: #fff; padding: 1px 3px; border-radius: 3px; }

/* ===== 12. 报告区域（保持原始玫粉配色，不随 UI 改版变化）===== */
/* 试卷与报告内容统一宋体 */
.page,
.page .data-table, .page .info-table, .page .comment,
.page .suggest-block, .page .corpus-report, .page .ai-block,
.page .q-title, .page .option, .page .option-text,
#view-report .report-summary, #view-report .report-byType, #view-report .report-suggestions,
#view-report .detail, #view-report .detail .stem, #view-report .detail .line, #view-report .detail .explain,
#admin-detail-body .report-summary, #admin-detail-body .detail, #admin-detail-body .detail .stem, #admin-detail-body .detail .line {
  font-family: var(--font-serif);
}
/* 标题/强调用黑体 */
.exam-head h2, #exam-title, #pp-title,
.page .title, .page h2.section, .page .appendix-title, .page .footer,
#view-report h2, #view-report h3, #admin-detail-body h3 {
  font-family: var(--font-bold);
  font-weight: 700;
}
/* 报告内 h2/h3 玫粉色（防止 .admin-content h3 等高特异性规则覆盖）*/
#view-report h2 { color: #e91e63; }
#view-report h3 { color: #c2185b; }
#overview-html h3 { color: #c2185b; font-size: 15px; font-weight: 600; margin: 20px 0 10px; font-family: "黑体",SimHei,"Microsoft YaHei","Heiti SC",sans-serif; }
#overview-html h2.section { color: #e91e63; font-size: 18px; font-weight: 700; margin: 28px 0 14px; padding-bottom: 6px; border-bottom: 2px solid #f8bbd0; font-family: "黑体",SimHei,"Microsoft YaHei","Heiti SC",sans-serif; }

/* --- 报告页面样式（与 analysis.js 中 reportCss 保持一致）--- */
.page { max-width: 900px; margin: 0 auto; padding: 32px 28px; box-sizing: border-box; }
.page .title { text-align: center; color: #e91e63; font-size: 24px; font-weight: 700; margin: 0 0 28px; }
.page h2.section { color: #e91e63; font-size: 18px; font-weight: 700; margin: 28px 0 14px; padding-bottom: 6px; border-bottom: 2px solid #f8bbd0; }
.page h3 { color: #c2185b; font-size: 15px; font-weight: 600; margin: 20px 0 10px; }
.page .info-table, .page .data-table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 10px 0; }
.page .info-table th, .page .info-table td { border: 1px solid #f8bbd0; padding: 10px 12px; text-align: left; }
.page .info-table th { width: 140px; background: #fce4ec; color: #880e4f; font-weight: 600; }
.page .data-table th { background: #e91e63; color: #fff; padding: 10px 12px; text-align: center; border: 1px solid #e91e63; }
.page .data-table td { border: 1px solid #f8bbd0; padding: 9px 10px; text-align: center; }
.page .data-table tr:nth-child(even) { background: #fff0f5; }
.page .tag { display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 12px; font-weight: 600; }
.page .tag-weak { background: #ffebee; color: #c62828; }
.page .tag-ok { background: #e8f5e9; color: #2e7d32; }
.page .tag-normal { background: #fff3e0; color: #ef6c00; }
.page .comment { color: #e91e63; font-size: 14px; margin: 12px 0; line-height: 1.6; }
.page .para { font-size: 14px; line-height: 1.8; margin: 10px 0; }
.page .suggest-block { background: #fff0f5; border-left: 4px solid #e91e63; padding: 12px 16px; border-radius: 0 8px 8px 0; margin: 10px 0; }
.page .suggest-block .tt { font-weight: 700; color: #880e4f; margin-bottom: 6px; }
.page .corpus-report { margin: 6px 0 4px; }
.page .corpus-report h3 { color: #ad1457; }
.page .corpus-report h4 { color: #ad1457; font-size: 14px; font-weight: 600; margin: 14px 0 8px; }
.page .corpus-note { font-size: 12px; color: #999; border-top: 1px dashed #f8bbd0; margin-top: 22px; padding-top: 8px; }
.page .appendix-title { color: #880e4f; font-size: 16px; font-weight: 700; margin: 0 0 6px; }
.page .appendix-hint { font-size: 13px; color: #888; margin: 0 0 18px; }
.page .ai-block { background: #fff8e1; border-left: 4px solid #ffb300; padding: 12px 16px; border-radius: 0 8px 8px 0; margin: 12px 0; font-size: 14px; line-height: 1.8; }
.page .ai-block .tt { font-weight: 700; color: #e65100; margin-bottom: 6px; }
.page .footer { text-align: center; color: #e91e63; font-weight: 700; margin-top: 30px; font-size: 15px; }
.page .highlight { background: #fff3e0 !important; font-weight: 700; }
.page .page-break { page-break-before: always; }
.page .small { font-size: 13px; color: #666; }
.page .chart-box { background: #fff; border: 1px solid #fce4ec; border-radius: 10px; padding: 16px; margin: 14px 0; }
.page .two-col { display: flex; gap: 20px; flex-wrap: wrap; }
.page .two-col > div { flex: 1; min-width: 300px; }
.page .report-logo { text-align: center; margin: 0 0 12px; }
.page .report-logo img { height: 48px; width: auto; }

/* --- 学生端报告卡片（原始玫粉配色）--- */
.report-summary {
  display: flex; gap: 28px; flex-wrap: wrap;
  background: #fce4ec;
  border-radius: 8px;
  padding: 22px 24px;
  margin: 16px 0;
  border: 1px solid #f8bbd0;
}
.report-summary .big { font-size: 36px; font-weight: 800; color: #e91e63; letter-spacing: -.02em; }
.report-summary .item { font-size: 14px; color: #666; }
.report-summary .item b { display: block; font-size: 20px; color: #333; margin-top: 4px; font-weight: 700; }

.report-byType { display: flex; gap: 16px; flex-wrap: wrap; }
.byType-card {
  flex: 1; min-width: 180px;
  border: 1px solid #f8bbd0;
  border-radius: 8px;
  padding: 18px;
  background: #fff;
}
.byType-card:hover { border-color: #e91e63; box-shadow: 0 2px 8px rgba(233,30,99,.12); }
.byType-card .t { font-weight: 600; color: #333; }
.byType-card .s { color: #666; font-size: 14px; margin-top: 6px; }

.report-suggestions {
  background: #fff0f5;
  border-left: 4px solid #e91e63;
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 18px 0;
}
.report-suggestions ul { margin: 8px 0 0; padding-left: 20px; }
.report-suggestions li { margin: 6px 0; line-height: 1.6; }

.detail {
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 16px 18px;
  margin-top: 14px;
}
.detail:hover { box-shadow: 0 2px 8px rgba(0,0,0,.06); }
.detail.ok { border-left: 4px solid #4caf50; background: #e8f5e9; }
.detail.no { border-left: 4px solid #ff9800; background: #fff3e0; }
.detail .stem { font-weight: 600; line-height: 1.7; }
.detail .line { font-size: 14px; margin-top: 8px; color: #666; }
.detail .explain { font-size: 13px; color: #999; margin-top: 8px; }
.your-ok { color: #4caf50; font-weight: 600; }
.your-no { color: #c62828; font-weight: 600; }

/* 历史记录行 */
.history-row {
  display: flex; align-items: center; justify-content: space-between;
  border: 1px solid #eee; border-radius: 8px; padding: 16px 18px;
  margin-top: 14px; cursor: pointer; transition: all .2s;
}
.history-row:hover { background: #fce4ec; border-color: #e91e63; }
.history-row .meta { font-size: 13px; color: #999; }
.history-row .score { font-size: 22px; font-weight: 800; color: #e91e63; }

.report-actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ===== 13. 徽章与状态 ===== */
.badge {
  background: var(--primary-50); color: var(--primary);
  font-size: 12px; padding: 3px 10px; border-radius: 6px; font-weight: 600;
}
.badge-on { background: var(--success-50); color: var(--success); font-size: 12px; padding: 3px 10px; border-radius: 6px; font-weight: 600; }
.badge-off { background: var(--gray-100); color: var(--gray-400); font-size: 12px; padding: 3px 10px; border-radius: 6px; font-weight: 500; }
.exam-status {
  background: var(--gray-50); border-radius: var(--radius-md);
  padding: 16px 18px; margin: 16px 0; font-size: 15px;
  border: 1px solid var(--gray-200);
}
.exam-status.warn { background: var(--danger-50); color: var(--danger); border-color: var(--danger-100); }
.exam-status.ok { background: var(--success-50); color: var(--success); border-color: var(--success-100); }

/* ===== 14. 管理后台布局 ===== */
.admin-shell { padding: 4px 0; }
body.admin-mode .container { max-width: 1240px; }
.admin-layout { display: flex; gap: 24px; align-items: flex-start; }
.admin-sidebar {
  flex: 0 0 240px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 88px;
}
.admin-sidebar-title {
  font-size: 11px; font-weight: 700; color: var(--gray-400); letter-spacing: .12em;
  padding: 4px 12px 16px; text-transform: uppercase;
}
.atab {
  display: flex; align-items: center; gap: 12px;
  width: 100%; text-align: left; padding: 14px 16px;
  border: none; border-radius: var(--radius-sm); background: transparent;
  color: var(--gray-600); cursor: pointer; font-size: 15px; font-weight: 500;
  margin-bottom: 6px; transition: var(--transition); font-family: inherit;
}
.atab .ico { font-size: 18px; line-height: 1; }
.atab:hover { background: var(--primary-50); color: var(--primary); }
.atab.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff; font-weight: 600;
  box-shadow: var(--shadow-primary);
}
.admin-content {
  flex: 1 1 auto; min-width: 0;
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 32px 34px; box-shadow: var(--shadow-md);
}
.admin-content h3 {
  font-size: 17px; color: var(--gray-700); margin: 28px 0 14px;
  padding-bottom: 10px; border-bottom: 1px solid var(--gray-100); font-weight: 600;
}
.admin-content h3:first-of-type { margin-top: 4px; }

/* ===== 15. 表格 ===== */
.students-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 14px; }
.students-table th {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  padding: 11px 12px; text-align: left;
  font-weight: 600; color: var(--gray-600);
  font-size: 13px;
}
.students-table td { border: 1px solid var(--gray-200); padding: 10px 12px; }
.students-table tr:nth-child(even) td { background: var(--gray-50); }
.students-table tr.done { cursor: pointer; }
.students-table tr.done:hover td { background: var(--primary-50); }
.tag-done { color: var(--success); font-weight: 600; cursor: pointer; }
.tag-not { color: var(--gray-400); }
.status-done { color: var(--success); font-weight: 600; }
.status-ongoing { color: var(--warning); font-weight: 600; }
.status-not { color: var(--gray-400); }
.students-table input.u-edit { padding: 6px 8px; font-size: 13px; }

/* 学生统计 */
.users-stats-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 8px 0 16px; }
.users-stats { display: flex; gap: 12px; flex-wrap: wrap; font-size: 14px; }
.users-stats .stat {
  background: var(--gray-50); padding: 8px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200); color: var(--gray-600);
}
.users-stats .stat b { color: var(--primary); font-weight: 700; }
.filter-status-inline { width: auto; min-width: 120px; max-width: 140px; padding: 8px 12px; font-size: 14px; }
.users-table-actions { display: flex; gap: 8px; }
.users-table-actions .btn { padding: 6px 12px; font-size: 13px; }

/* ===== 16. 学生首页考试卡片 ===== */
.exam-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin-top: 16px;
  background: #fff;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.exam-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary), var(--primary-light));
  border-radius: 2px 0 0 2px;
}
.exam-card:hover { border-color: var(--primary-200); box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.exam-card-title { font-size: 18px; font-weight: 700; color: var(--gray-900); }
.exam-card-meta { font-size: 14px; color: var(--gray-400); margin: 10px 0 16px; }
.exam-card-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* ===== 17. 考试管理列表 ===== */
.exam-list-toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.exam-list-toolbar input { max-width: 260px; }
.exam-row {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-top: 16px;
  background: #fff;
  transition: var(--transition);
}
.exam-row:hover { border-color: var(--primary-200); box-shadow: var(--shadow-md); }
.exam-row .meta { font-size: 13px; color: var(--gray-400); margin: 10px 0 14px; }
.exam-row-actions { display: flex; gap: 8px; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; align-items: center; }
.exam-row-actions .btn { padding: 7px 13px; font-size: 13px; white-space: nowrap; flex: 0 0 auto; }

/* 分页（考试列表页脚）：作为与顶部 .topbar 页眉对称的页脚栏，提升可见性与信息完整度 */
.pagination {
  display: flex; gap: 16px; align-items: center; justify-content: center; flex-wrap: wrap;
  margin-top: 20px;
  min-height: 64px;                 /* 与页眉 .topbar(64px) 高度保持一致，视觉对称 */
  padding: 0 20px;
  border-top: 1px solid var(--gray-200, #eceff3);
  background: #fafbfc;
  border-radius: 0 0 12px 12px;
  font-size: 14px;
}
.pagination button { padding: 9px 18px; font-size: 14px; min-width: 92px; }
.pagination button:disabled { opacity: .45; cursor: not-allowed; }
.pagination .page-info { font-size: 14px; color: var(--gray-600, #475569); font-weight: 600; white-space: nowrap; }

/* ===== 18. 开关与复选框 ===== */
.switch { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--gray-600); cursor: pointer; }
.switch input { width: 18px; height: 18px; accent-color: var(--primary); }
.switch-row { display: flex; flex-direction: row; align-items: center; gap: 10px; }
.switch-row label { color: var(--gray-800); font-weight: 500; }

/* ===== 19. 弹窗 Modal ===== */
.modal {
  position: fixed; inset: 0;
  background: rgba(15,23,42,.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity: 0; } to { opacity: 1; } }
.modal-content {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 540px;
  width: 90%;
  box-shadow: var(--shadow-xl);
  animation: modalSlide .25s ease;
}
@keyframes modalSlide { from { opacity: 0; transform: translateY(20px) scale(.98); } to { opacity: 1; transform: none; } }

/* ===== 20. 筛选行 ===== */
.filter-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; margin: 14px 0; }
.filter-row input { max-width: 160px; }

/* ===== 21. 打包导出报告 ===== */
.export-scope-box {
  border: 1px solid var(--primary-100);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 18px 0;
  background: linear-gradient(135deg, var(--primary-50), var(--gray-50));
}
.export-scope-box h4 { margin-top: 0; margin-bottom: 14px; font-size: 15px; }

/* 打包导出报告标题行 */
.scope-header { display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.scope-header h4 { margin: 0; font-size: 15px; }
.scope-hint { font-size: 14px; color: var(--gray-500); }

/* 选择考试行内按钮 */
.exam-select-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.exam-select-row select { flex: 1; min-width: 200px; max-width: 320px; }
.scope-options { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.scope-options label {
  display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--gray-600);
  cursor: pointer; padding: 8px 14px; border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm); background: #fff; transition: var(--transition);
}
.scope-options label:hover { border-color: var(--primary); background: var(--primary-50); color: var(--primary); }
.scope-options input { width: auto; accent-color: var(--primary); }
.scope-value-field { display: none; max-width: none; }

/* ===== 22. 题目识别候选卡片 ===== */
.candidate-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-top: 16px;
  background: var(--gray-50);
  transition: var(--transition);
}
.candidate-card:hover { border-color: var(--primary-200); box-shadow: var(--shadow-sm); }
.candidate-card .field { margin-bottom: 12px; }
.candidate-card .c-image { margin: 8px 0; }
.candidate-card .c-image img { max-width: 100%; max-height: 220px; border: 1px solid var(--gray-200); border-radius: var(--radius-sm); }

/* 配图与公式 */
.c-figures { display: flex; flex-wrap: wrap; gap: 12px; margin: 10px 0; }
.c-figure { flex: 1 1 220px; max-width: 320px; }
.c-figure img { max-width: 100%; max-height: 220px; border: 1px solid var(--gray-200); border-radius: var(--radius-sm); display: block; margin-bottom: 6px; }
.c-figure input { width: 100%; font-size: 12px; padding: 6px 8px; }

/* ===== 23. KaTeX ===== */
.katex { font-size: 1.05em; }
.q-title .katex { font-size: 1.08em; }
.option-text .katex { font-size: 1em; }

/* ===== 24. 试卷预览 ===== */
.pp-toolbar { margin: 16px 0 6px; }
.pp-answer {
  margin-top: 12px; padding: 12px 16px;
  background: var(--primary-50); border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm); font-size: 14px;
}
.pp-answer .line { margin-top: 6px; color: var(--gray-600); }
.pp-answer .explain { color: var(--gray-400); margin-top: 6px; }

/* ===== 25. 报告语料弹层 ===== */
.modal-wide { max-width: 740px; width: 94%; }
.corpus-current {
  margin: 14px 0; padding: 16px 18px;
  background: var(--primary-50); border: 1px solid var(--primary-100);
  border-radius: var(--radius-md); font-size: 14px;
}
.corpus-current p { margin: 6px 0; }
.corpus-role { display: inline-block; font-size: 12px; padding: 2px 10px; border-radius: 6px; margin-right: 6px; font-weight: 500; }
.corpus-role-template-student { background: var(--primary-50); color: var(--primary); }
.corpus-role-template-overview { background: var(--success-50); color: var(--success); }
.corpus-role-template-unknown { background: var(--warning-50); color: var(--warning); }
.corpus-role-corpus { background: var(--gray-100); color: var(--gray-500); }
.corpus-role-skipped, .corpus-role-error { background: var(--danger-50); color: var(--danger); }
.corpus-filelist { max-height: 200px; overflow: auto; font-size: 13px; padding-left: 18px; }
.corpus-rules { margin: 12px 0; }
.corpus-rules summary { cursor: pointer; color: var(--primary); font-size: 14px; font-weight: 500; }
.corpus-rules pre {
  background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
  padding: 14px; font-size: 13px; white-space: pre-wrap; line-height: 1.8;
  max-height: 280px; overflow: auto;
}

/* ===== 26. 滚动条美化 ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* ===== 27. 选中文字 ===== */
::selection { background: var(--primary-100); color: var(--primary-dark); }

/* ===== 28. 代码标签 ===== */
code { background: var(--gray-100); padding: 2px 8px; border-radius: var(--radius-sm); font-size: 13px; color: var(--primary); }

/* ===== 29. 响应式 ===== */
@media (max-width: 768px) {
  .topbar { padding: 0 16px; height: 56px; }
  .brand { font-size: 16px; }
  .logo-img { height: 30px; }
  .container { padding: 0 12px; margin-top: 20px; }
  .card { padding: 20px; border-radius: var(--radius-md); }
  .admin-layout { flex-direction: column; }
  .admin-sidebar { position: static; flex: none; }
  .admin-sidebar .atab { display: inline-flex; }
  .admin-content { padding: 20px; }
  h2 { font-size: 20px; }
  .report-summary { gap: 16px; padding: 16px; }
  .report-summary .big { font-size: 28px; }
  .exam-row-actions { flex-wrap: wrap; }
  .modal-content { padding: 20px; }
  .users-stats { gap: 8px; }
  .users-stats .stat { padding: 6px 10px; font-size: 13px; }
}

/* 报告下架提示 */
.notice-closed {
  margin: 12px 0;
  padding: 14px 16px;
  border: 1px solid #ffd9a8;
  background: #fff8ec;
  color: #8a5a12;
  border-radius: 10px;
  font-size: 15px;
  line-height: 1.7;
}

/* 新增账号：姓名查重提示（纯新增，不影响其他样式） */
.dup-hint {
  margin-left: 8px;
  color: #d32f2f;
  font-size: 13px;
  font-weight: 600;
}