/* ============================================================
   公司内部考试系统 - 统一设计系统
   员工端移动优先（375px 可用） / 管理端 PC 优先（≤768px 侧栏折叠）
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --primary: #2563eb;          /* 主色 */
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #16a34a;          /* 成功 */
  --success-light: #dcfce7;
  --warning: #d97706;          /* 警告 */
  --warning-light: #fef3c7;
  --danger: #dc2626;           /* 危险 */
  --danger-light: #fee2e2;
  --info: #0284c7;
  --info-light: #e0f2fe;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --bg: #f3f4f6;
  --card-bg: #ffffff;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(17, 24, 39, .08), 0 1px 2px rgba(17, 24, 39, .04);
  --shadow-lg: 0 12px 32px rgba(17, 24, 39, .18);
  --header-h: 56px;
}

/* ---------- 基础重置 ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }
ul, ol { list-style: none; }

/* ---------- 通用工具类 ---------- */
.text-danger { color: var(--danger) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-muted { color: var(--text-secondary); }
.pre-text { white-space: pre-wrap; word-break: break-word; }
.page-title-row {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  margin-bottom: 14px;
}
.page-title-row h2 { font-size: 19px; }
.muted-note { font-size: 13px; color: var(--text-secondary); }
.pad { padding: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 8px 16px; font-size: 14px; line-height: 1.4;
  transition: background .15s, color .15s, border-color .15s, opacity .15s;
  user-select: none; white-space: nowrap;
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover:not(:disabled) { background: var(--primary-light); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { display: flex; width: 100%; }

/* ---------- 表单 ---------- */
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 5px; font-weight: 600; }
.form-control {
  display: block; width: 100%;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 9px 11px; font-size: 14px; color: var(--text); background: #fff;
  transition: border-color .15s, box-shadow .15s;
}
.form-control:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}
textarea.form-control { resize: vertical; }
.form-row { display: flex; gap: 10px; }
.form-row .form-group { flex: 1; }
.form-hint { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }
.confirm-text { font-size: 15px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 16px; margin-bottom: 14px;
}

/* ---------- 标签徽章 ---------- */
.badge {
  display: inline-flex; align-items: center;
  padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600; line-height: 1.6; white-space: nowrap;
}
.badge-primary { background: var(--primary-light); color: var(--primary-dark); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger  { background: var(--danger-light); color: var(--danger); }
.badge-info    { background: var(--info-light); color: var(--info); }
.badge-neutral { background: var(--bg); color: var(--text-secondary); }
.badge-type    { background: #eef2ff; color: #4338ca; }
.badge-type.type-single   { background: var(--primary-light); color: var(--primary-dark); }
.badge-type.type-multiple { background: #ede9fe; color: #6d28d9; }
.badge-type.type-judge    { background: #cffafe; color: #0e7490; }
.badge-type.type-short    { background: var(--warning-light); color: var(--warning); }

/* ---------- 表格（窄屏自动卡片化） ---------- */
.table-responsive { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; background: #fff; }
.table th, .table td {
  padding: 11px 12px; text-align: left; font-size: 14px;
  border-bottom: 1px solid var(--border); vertical-align: middle; word-break: break-word;
}
.table th { font-size: 13px; color: var(--text-secondary); background: #f9fafb; white-space: nowrap; }
.table tbody tr:hover { background: #f8fafc; }
.table .actions-cell { display: flex; gap: 6px; flex-wrap: wrap; }
.stem-cell { max-width: 420px; }
@media (max-width: 768px) {
  /* 窄屏表格转卡片布局：依赖 td 的 data-label 属性 */
  .table-responsive { overflow: visible; }
  .table, .table tbody, .table tr, .table td { display: block; width: 100%; }
  .table thead { display: none; }
  .table tr {
    border: 1px solid var(--border); border-radius: var(--radius);
    margin-bottom: 10px; padding: 6px 10px; box-shadow: var(--shadow);
  }
  .table td { border-bottom: none; display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 7px 2px; }
  .table td:last-child { border-bottom: none; }
  .table td::before {
    content: attr(data-label);
    color: var(--text-secondary); font-weight: 600; font-size: 13px; flex-shrink: 0;
  }
  .table td:empty::before { display: none; }
  .table .actions-cell { justify-content: flex-end; }
  .stem-cell { max-width: none; }
}

/* ---------- 弹窗 modal ---------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 99998;
  background: rgba(17, 24, 39, .5);
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal {
  background: #fff; border-radius: var(--radius);
  width: 100%; max-width: 560px; max-height: 86vh;
  display: flex; flex-direction: column; box-shadow: var(--shadow-lg);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
}
.modal-head h3 { font-size: 16px; }
.modal-close {
  border: none; background: none; font-size: 22px; line-height: 1;
  color: var(--text-secondary); padding: 2px 6px; border-radius: 4px;
}
.modal-close:hover { background: var(--bg); color: var(--text); }
.modal-body { padding: 16px 18px; overflow-y: auto; }
.modal-foot {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 12px 18px; border-top: 1px solid var(--border);
}

/* ---------- toast ---------- */
.toast-container {
  position: fixed; top: 14px; left: 50%; transform: translateX(-50%);
  z-index: 99997; display: flex; flex-direction: column; gap: 8px;
  width: min(92vw, 400px); pointer-events: none;
}
.toast {
  padding: 10px 16px; border-radius: var(--radius-sm);
  color: #fff; font-size: 14px; box-shadow: var(--shadow-lg);
  opacity: 1; transition: opacity .3s, transform .3s;
  text-align: center; word-break: break-word;
}
.toast.hide { opacity: 0; transform: translateY(-8px); }
.toast-info    { background: #334155; }
.toast-success { background: var(--success); }
.toast-warning { background: var(--warning); }
.toast-danger  { background: var(--danger); }

/* ---------- 加载与空状态 ---------- */
.loading {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 40px 16px; color: var(--text-secondary); font-size: 14px;
}
.spinner {
  width: 22px; height: 22px; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--primary);
  animation: spin .8s linear infinite; flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.empty {
  padding: 48px 16px; text-align: center; color: var(--text-secondary);
  font-size: 14px; background: #fff; border: 1px dashed var(--border);
  border-radius: var(--radius); margin-bottom: 14px;
}

/* ---------- 得分条形 ---------- */
.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.bar-label { width: 52px; font-size: 14px; color: var(--text-secondary); flex-shrink: 0; }
.bar-track {
  flex: 1; height: 12px; background: var(--bg); border-radius: 999px; overflow: hidden;
}
.bar-fill {
  height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), #60a5fa);
  transition: width .5s ease;
}
.bar-value { width: 70px; text-align: right; font-size: 13px; color: var(--text-secondary); flex-shrink: 0; }

/* ---------- 分页 ---------- */
.pager {
  display: flex; align-items: center; justify-content: flex-end; gap: 10px;
  padding: 12px 2px 2px; font-size: 13px; color: var(--text-secondary);
  flex-wrap: wrap;
}

/* ============================================================
   登录页
   ============================================================ */
.login-page {
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 32px;
  background:
    radial-gradient(circle at 14% 18%, rgba(255, 255, 255, .14) 0, rgba(255, 255, 255, 0) 24%),
    radial-gradient(circle at 88% 82%, rgba(96, 165, 250, .34) 0, rgba(96, 165, 250, 0) 28%),
    linear-gradient(140deg, #173a8f 0%, #1d5ed7 52%, #367ff0 100%);
}
.login-page::before,
.login-page::after {
  content: ''; position: absolute; border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 50%; pointer-events: none;
}
.login-page::before { width: 430px; height: 430px; top: -250px; right: 2%; }
.login-page::after { width: 270px; height: 270px; bottom: -155px; left: 7%; }
.login-card {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 310px minmax(0, 1fr);
  width: 100%; max-width: 840px; min-height: 520px; overflow: hidden;
  background: #fff; border: 1px solid rgba(255, 255, 255, .6); border-radius: 20px;
  box-shadow: 0 28px 70px rgba(15, 45, 105, .28);
}
.login-brand-panel {
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 42px 36px 34px; color: #fff;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, .12), rgba(255, 255, 255, 0) 42%),
    linear-gradient(155deg, #123b9c 0%, #1e64dc 100%);
}
.login-brand-mark {
  width: 76px; height: 76px; padding: 9px; overflow: hidden;
  background: #fff; border-radius: 20px; box-shadow: 0 14px 30px rgba(3, 24, 72, .22);
}
.login-brand-img { display: block; width: 100%; height: 100%; object-fit: contain; }
.login-brand-name {
  margin-top: 22px; font-size: 30px; font-weight: 700; letter-spacing: .08em;
}
.login-brand-tagline { margin-top: 8px; color: rgba(255, 255, 255, .78); font-size: 15px; }
.login-brand-points {
  display: grid; gap: 15px; margin: 44px 0 auto; padding: 0; list-style: none;
  color: rgba(255, 255, 255, .9); font-size: 14px;
}
.login-brand-points li { position: relative; padding-left: 22px; }
.login-brand-points li::before {
  content: ''; position: absolute; top: 6px; left: 1px; width: 7px; height: 7px;
  box-sizing: content-box; background: #93c5fd; border: 3px solid rgba(255, 255, 255, .18); border-radius: 50%;
}
.login-brand-footer {
  padding-top: 28px; color: rgba(255, 255, 255, .48); font-size: 10px; letter-spacing: .16em;
}
.login-form-panel {
  display: flex; flex-direction: column; justify-content: center; padding: 50px 52px 38px;
}
.login-form-heading { margin-bottom: 30px; }
.login-eyebrow {
  margin-bottom: 10px; color: var(--primary); font-size: 11px; font-weight: 700; letter-spacing: .14em;
}
.login-logo {
  margin: 0; color: #172033; font-size: 27px; font-weight: 700; letter-spacing: 1px;
}
.login-sub {
  margin: 9px 0 0; color: var(--text-secondary); font-size: 14px;
}
.login-form-panel .form-group { margin-bottom: 18px; }
.login-form-panel .form-label { margin-bottom: 8px; color: #374151; font-size: 14px; }
.login-form-panel .form-control {
  height: 48px; padding: 11px 14px; border-color: #dbe2ec; border-radius: 9px; background: #fbfcfe;
}
.login-form-panel .form-control:hover { border-color: #b8c6da; }
.login-form-panel .form-control:focus {
  background: #fff; box-shadow: 0 0 0 3px rgba(37, 99, 235, .11);
}
.login-form-panel .btn-block {
  height: 48px; margin-top: 4px; border-radius: 9px; font-size: 15px;
  letter-spacing: .16em; box-shadow: 0 10px 22px rgba(37, 99, 235, .2);
}
.login-security-note {
  margin: 25px 0 0; color: #9aa3b2; font-size: 12px; text-align: center;
}
@media (max-width: 700px) {
  .login-page { align-items: flex-start; min-height: 100vh; padding: 18px; }
  .login-card { display: block; max-width: 440px; min-height: 0; border-radius: 16px; }
  .login-brand-panel { display: block; padding: 25px 24px; }
  .login-brand-mark {
    float: left; width: 58px; height: 58px; margin-right: 16px; padding: 7px; border-radius: 15px;
  }
  .login-brand-name { margin-top: 0; padding-top: 4px; font-size: 22px; }
  .login-brand-tagline { margin-top: 4px; font-size: 13px; }
  .login-brand-points, .login-brand-footer { display: none; }
  .login-form-panel { padding: 32px 24px 26px; }
  .login-form-heading { margin-bottom: 25px; }
  .login-logo { font-size: 23px; }
  .login-security-note { margin-top: 22px; }
}
@media (min-width: 701px) and (max-height: 680px) {
  .login-page { padding: 20px; }
  .login-card { min-height: 480px; }
  .login-brand-panel { padding-top: 32px; }
  .login-form-panel { padding-top: 36px; padding-bottom: 30px; }
}

/* ============================================================
   员工端（移动优先）
   ============================================================ */
.app-header {
  position: sticky; top: 0; z-index: 90;
  height: var(--header-h); background: #fff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px; gap: 10px;
}
.app-header-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.app-logo {
  font-weight: 700; font-size: 16px; color: var(--primary); white-space: nowrap;
}
.app-nav { display: flex; gap: 4px; }
.app-nav a {
  padding: 6px 10px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 14px; white-space: nowrap;
}
.app-nav a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.app-header-right { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.app-header-right .user-name { font-size: 14px; font-weight: 600; }

.app-main { max-width: 860px; margin: 0 auto; padding: 16px 14px 40px; }

/* ---------- 我的考试卡片 ---------- */
.exam-list { display: flex; flex-direction: column; gap: 14px; }
.exam-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.exam-card-head h3 { font-size: 16px; line-height: 1.45; }
.exam-card-meta { display: flex; flex-direction: column; gap: 3px; font-size: 13px; color: var(--text-secondary); }
.exam-card-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border); flex-wrap: wrap;
}
.exam-score-line { display: flex; align-items: center; gap: 12px; font-size: 15px; flex-wrap: wrap; }
.exam-score-line b { color: var(--primary); font-size: 18px; }

/* ---------- 考试页 ---------- */
.exam-topbar {
  position: sticky; top: var(--header-h); z-index: 80;
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 10px 14px; margin-bottom: 14px;
}
.exam-topbar-title {
  font-size: 15px; font-weight: 700;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.countdown {
  font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums;
  color: var(--primary); white-space: nowrap; flex-shrink: 0;
}
.countdown.danger { color: var(--danger); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: .45; } }

.exam-questions { padding-bottom: 76px; }
.question-card { margin-bottom: 14px; position: relative; }
.q-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.q-no { font-weight: 700; font-size: 15px; }
.q-score-tag { font-size: 12px; color: var(--text-secondary); }
.q-stem { font-size: 15px; margin-bottom: 12px; white-space: pre-wrap; word-break: break-word; }

/* 可点选项 */
.option {
  display: flex; align-items: center; gap: 10px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 12px; margin-bottom: 9px; cursor: pointer;
  transition: border-color .12s, background .12s;
  background: #fff;
}
.option:hover { border-color: #93c5fd; }
.option.checked { border-color: var(--primary); background: #eff6ff; }
.option input { position: absolute; opacity: 0; pointer-events: none; }
.option-letter {
  width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--bg); color: var(--text-secondary); font-size: 13px; font-weight: 700;
}
.option.checked .option-letter { background: var(--primary); color: #fff; }
.option-text { word-break: break-word; }
.option-judge {
  justify-content: center; font-size: 16px; font-weight: 600; padding: 13px;
  display: inline-flex; width: calc(50% - 5px);
}
.option-judge-wrap { display: flex; gap: 10px; }
.short-input { font-size: 15px; }

/* 考试底部操作条 */
.exam-bottombar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 85;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: #fff; border-top: 1px solid var(--border);
  box-shadow: 0 -4px 14px rgba(17, 24, 39, .08);
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0));
}
.answered-bar { font-size: 14px; color: var(--text-secondary); }
.answered-bar b { color: var(--primary); font-size: 16px; }

/* ---------- 防泄密全屏水印层（v2：透明度提升至 0.10） ---------- */
.watermark-layer {
  position: fixed; inset: 0; z-index: 99999;   /* 全屏且层级最高 */
  pointer-events: none;                        /* 不拦截任何点击 */
  opacity: .10;                                /* 低透明度不干扰答题 */
  background-repeat: repeat;
  background-size: 260px 180px;                /* 平铺间距 260x180 */
}

/* ---------- 当场出分结果页 ---------- */
.result-card { text-align: center; padding: 34px 18px 26px; }
.result-title { font-size: 15px; color: var(--text-secondary); margin-bottom: 6px; }
.result-score { font-size: 64px; font-weight: 800; color: var(--primary); line-height: 1.15; }
.result-score.low { color: var(--danger); }
.result-score .result-total { font-size: 22px; color: var(--text-secondary); font-weight: 600; }
.result-bars { max-width: 420px; margin: 22px auto 6px; text-align: left; }
.result-actions {
  display: flex; justify-content: center; gap: 12px; margin-top: 22px; flex-wrap: wrap;
}

/* ---------- 成绩详情 / 错题 ---------- */
.score-head-card { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.score-head-card .big { font-size: 28px; font-weight: 800; color: var(--primary); }
.sq-card.sq-wrong { border-left: 4px solid var(--danger); }
.sq-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.sq-score { margin-left: auto; font-size: 13px; color: var(--text-secondary); }
.sq-stem { font-size: 15px; font-weight: 600; margin-bottom: 10px; white-space: pre-wrap; word-break: break-word; }
.sq-row {
  display: flex; gap: 10px; padding: 7px 0; font-size: 14px;
  border-top: 1px dashed var(--border); flex-wrap: wrap;
}
.sq-label { color: var(--text-secondary); flex-shrink: 0; min-width: 66px; }
.sq-points { border-top: 1px dashed var(--border); padding-top: 8px; margin-top: 2px; }
.sq-points ul { margin-top: 6px; }
.sq-points li {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 4px 0; font-size: 13.5px;
}
.sq-points .pt-text { flex: 1; min-width: 120px; }
.sq-review {
  margin-top: 10px; padding: 9px 12px; border-radius: var(--radius-sm);
  background: var(--warning-light); color: #92400e; font-size: 13.5px;
}

/* ============================================================
   管理端（PC 优先，≤768px 侧栏折叠为顶部导航）
   ============================================================ */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 224px; flex-shrink: 0;
  background: #0f172a; color: #cbd5e1;
  display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh;
}
.admin-brand { padding: 20px 18px 14px; border-bottom: 1px solid #1e293b; }
.admin-brand .brand-main { color: #fff; font-size: 16px; font-weight: 700; line-height: 1.4; }
.admin-brand .brand-sub { font-size: 12px; color: #64748b; }
.admin-brand .brand-img {
  height: 28px; width: 28px; margin-right: 8px; vertical-align: -7px;
  background: #fff; border-radius: 7px; padding: 2px;
}
.admin-nav { flex: 1; padding: 12px 10px; display: flex; flex-direction: column; gap: 4px; overflow-y: auto; }
.admin-nav a {
  display: block; padding: 10px 14px; border-radius: 8px;
  color: #cbd5e1; font-size: 14px; white-space: nowrap;
}
.admin-nav a:hover { background: #1e293b; color: #fff; }
.admin-nav a.active { background: var(--primary); color: #fff; font-weight: 600; }
.admin-sidebar-foot {
  padding: 14px 16px; border-top: 1px solid #1e293b;
  display: flex; flex-direction: column; gap: 8px; font-size: 13px;
}
.admin-sidebar-foot .s-user { color: #94a3b8; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
  background: #fff; border-bottom: 1px solid var(--border);
  padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.admin-topbar h1 { font-size: 18px; }
.admin-content { padding: 20px 24px 44px; max-width: 1200px; width: 100%; }
.page-toolbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  flex-wrap: wrap; margin-bottom: 14px;
}
.page-toolbar .toolbar-left, .page-toolbar .toolbar-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.search-input { width: 240px; }

/* ---------- 数据看板统计卡 ---------- */
.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px; margin-bottom: 16px;
}
.stat-card { padding: 20px 18px; }
.stat-card .stat-value { font-size: 32px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-card .stat-label { font-size: 14px; font-weight: 600; margin-top: 4px; }
.stat-card .stat-desc { font-size: 12.5px; color: var(--text-secondary); margin-top: 2px; }
.stat-card.c-success .stat-value { color: var(--success); }
.stat-card.c-warning .stat-value { color: var(--warning); }
.stat-card.c-info .stat-value { color: var(--info); }

/* ---------- 题型统计 chips ---------- */
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.stat-chip {
  border: 1px solid var(--border); background: #fff; border-radius: 999px;
  padding: 6px 14px; font-size: 13.5px; color: var(--text-secondary);
  display: inline-flex; align-items: center; gap: 6px;
}
.stat-chip b { color: var(--text); font-size: 14px; }
.stat-chip.active { border-color: var(--primary); background: var(--primary-light); color: var(--primary-dark); }
.stat-chip.active b { color: var(--primary-dark); }
.stat-chip:hover { border-color: var(--primary); }

/* ---------- 筛选 tabs ---------- */
.tabs { display: flex; gap: 2px; border-bottom: 2px solid var(--border); margin-bottom: 14px; overflow-x: auto; }
.tabs button {
  border: none; background: none; padding: 9px 16px; font-size: 14px;
  color: var(--text-secondary); border-bottom: 2px solid transparent; margin-bottom: -2px;
  white-space: nowrap;
}
.tabs button:hover { color: var(--primary); }
.tabs button.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* ---------- 工具卡（导入 / 变体） ---------- */
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 16px; }
@media (max-width: 900px) { .tool-grid { grid-template-columns: 1fr; } }
.tool-card h3 { font-size: 15px; margin-bottom: 8px; }
.tool-card .muted { font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; }
.tool-card .form-group { margin-bottom: 10px; }
.format-help { margin: 10px 0; font-size: 13px; }
.format-help summary { cursor: pointer; color: var(--primary); font-weight: 600; }
.format-help pre {
  background: var(--bg); border-radius: var(--radius-sm); padding: 10px;
  margin: 8px 0; font-size: 12.5px; overflow-x: auto; white-space: pre-wrap;
}
.import-result { margin-top: 12px; font-size: 13.5px; }
.import-result .error-list { margin-top: 6px; color: var(--danger); max-height: 160px; overflow-y: auto; }
.import-result .error-list li { padding: 2px 0; }

/* ---------- 题目编辑（选项行 / 得分点行） ---------- */
.opt-edit-row, .sp-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.opt-letter {
  width: 26px; height: 26px; border-radius: 6px; background: var(--bg);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; color: var(--text-secondary); flex-shrink: 0;
}
.opt-edit-row .form-control { flex: 1; min-width: 0; }
.opt-ans { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; color: var(--text-secondary); white-space: nowrap; }
.sp-row .sp-text { flex: 2.2; min-width: 0; }
.sp-row .sp-score { flex: 1; min-width: 70px; }
.row-del-btn {
  border: none; background: none; color: var(--danger); font-size: 14px;
  padding: 4px 6px; border-radius: 4px; flex-shrink: 0;
}
.row-del-btn:hover { background: var(--danger-light); }
.add-row-btn {
  border: 1px dashed var(--border); background: none; color: var(--primary);
  padding: 7px 14px; border-radius: var(--radius-sm); font-size: 13.5px;
}
.add-row-btn:hover { border-color: var(--primary); background: #f8fafc; }
.judge-ans { display: flex; gap: 22px; padding: 6px 0; font-size: 15px; }
.judge-ans label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }

/* ---------- 试卷标准卡片 ---------- */
.std-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.std-card h3 { font-size: 16px; margin-bottom: 8px; word-break: break-word; }
.std-line { font-size: 13.5px; color: var(--text); padding: 3px 0; }
.std-total {
  margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border);
  font-size: 14px; font-weight: 700; color: var(--primary);
}
.std-actions { display: flex; gap: 8px; margin-top: 10px; }
.std-edit-row { display: flex; align-items: center; gap: 8px; margin-bottom: 9px; }
.std-edit-label { width: 40px; font-size: 14px; font-weight: 600; flex-shrink: 0; }
.std-edit-row .form-control { width: 92px; }
.std-x { color: var(--text-secondary); }
.std-line-score { font-size: 13px; color: var(--text-secondary); width: 64px; text-align: right; flex-shrink: 0; }
.std-total-preview {
  padding: 10px 12px; background: var(--primary-light); color: var(--primary-dark);
  border-radius: var(--radius-sm); font-size: 14px; font-weight: 600;
}

/* ---------- 复核视图 ---------- */
.review-head-info { display: flex; gap: 18px; flex-wrap: wrap; font-size: 14px; }
.review-head-info b { color: var(--primary); }
.review-short .grade-row { display: flex; align-items: center; gap: 10px; margin-top: 8px; flex-wrap: wrap; }
.review-short .grade-row label { font-size: 13px; color: var(--text-secondary); white-space: nowrap; }
.review-short .grade-score { width: 100px; }
.review-short .grade-comment { flex: 1; min-width: 200px; }
.cheat-section h3 { font-size: 16px; margin: 20px 0 10px; }
.cheat-list li {
  display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap;
  padding: 9px 4px; border-bottom: 1px dashed var(--border); font-size: 14px;
}
.cheat-list .cheat-time { color: var(--text-secondary); font-size: 13px; }
.cheat-list .cheat-detail { color: var(--text-secondary); font-size: 13px; flex: 1; min-width: 160px; }

/* ---------- 管理端窄屏：侧栏折叠为顶部导航 ---------- */
@media (max-width: 768px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar {
    width: 100%; height: auto; position: static; flex-direction: column;
  }
  .admin-brand { padding: 12px 14px 8px; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
  .admin-nav {
    flex-direction: row; overflow-x: auto; padding: 4px 10px 10px;
    border-bottom: 1px solid #1e293b;
  }
  .admin-nav a { padding: 7px 12px; font-size: 13.5px; flex-shrink: 0; }
  .admin-sidebar-foot { flex-direction: row; align-items: center; justify-content: space-between; padding: 10px 14px; }
  .admin-topbar { padding: 12px 14px; }
  .admin-content { padding: 14px 12px 40px; }
  .search-input { width: 100%; }
  .page-toolbar .toolbar-left, .page-toolbar .toolbar-right { width: 100%; }
}

/* ============================================================
   v2 增强样式（水印双层 / 答题卡 / 开关 / 导入预览 / 看板等）
   ============================================================ */

/* ---------- 空状态 SVG 插画 ---------- */
.empty .empty-illustration {
  width: 76px; height: auto; display: block; margin: 0 auto 10px;
  color: #cbd5e1;
}
.empty p { margin: 0; }

/* ---------- 导航 / 按钮 内联 SVG 图标 ---------- */
.nav-icon {
  width: 16px; height: 16px; flex-shrink: 0;
  vertical-align: -3px;
}
.btn-icon { width: 15px; height: 15px; flex-shrink: 0; }
.app-nav a { display: inline-flex; align-items: center; gap: 5px; }
.admin-nav a { display: flex; align-items: center; gap: 9px; }

/* ---------- 考试路由：折叠顶部导航，回收屏幕空间 ---------- */
body.exam-focus .app-nav,
body.exam-focus .app-logo { display: none; }
body.exam-focus { --header-h: 44px; }

/* ---------- 双层水印：题卡内嵌第二层（同一 dataURL，颜色更淡） ---------- */
body.in-exam .question-card::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  background-image: var(--exam-wm, none);
  background-repeat: repeat;
  background-size: 260px 180px;
  opacity: .05;                 /* 比全屏层（0.10）更淡 */
  pointer-events: none;
}

/* ---------- 答题卡弹层 ---------- */
.sheet-stat { font-size: 14px; margin-bottom: 12px; color: var(--text); }
.sheet-stat b { color: var(--warning); font-size: 16px; }
.sheet-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 8px; margin-bottom: 10px;
}
.sheet-cell {
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text-secondary); border-radius: 8px;
  padding: 9px 0; font-size: 14px; font-weight: 600; text-align: center;
}
.sheet-cell:hover { border-color: var(--primary); }
.sheet-cell.answered { background: var(--success-light); color: var(--success); border-color: #a7f3d0; }
.sheet-cell.current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 未开始考试（upcoming）灰色卡片 ---------- */
.exam-upcoming-card { background: #f8fafc; border-style: dashed; }
.exam-upcoming-tip { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }
.exam-upcoming-tip b { color: var(--text); }

/* ---------- 通用开关（只看错题 / 仅看简答题） ---------- */
.switch-toggle {
  display: inline-flex; align-items: center; gap: 8px;
  cursor: pointer; user-select: none; font-size: 13.5px; white-space: nowrap;
}
.switch-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.switch-slider {
  width: 38px; height: 20px; border-radius: 999px;
  background: #d1d5db; position: relative; transition: background .15s; flex-shrink: 0;
}
.switch-slider::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; border-radius: 50%; background: #fff;
  transition: left .15s; box-shadow: 0 1px 2px rgba(0, 0, 0, .2);
}
.switch-toggle input:checked + .switch-slider { background: var(--primary); }
.switch-toggle input:checked + .switch-slider::after { left: 20px; }

/* ---------- 题库导入：预览编辑弹窗 ---------- */
.import-btn-row { display: flex; gap: 10px; flex-wrap: wrap; }
.import-summary {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-size: 14px; margin-bottom: 12px;
}
.import-summary b { color: var(--primary); }
.error-details summary { cursor: pointer; color: var(--danger); font-weight: 600; font-size: 13.5px; }
.error-details ul { margin-top: 6px; color: var(--danger); font-size: 13px; max-height: 140px; overflow-y: auto; }
.error-details li { padding: 2px 0; }
.import-item {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  margin-bottom: 8px; overflow: hidden;
}
.import-item-summary {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 8px 10px; background: #f9fafb; cursor: pointer;
}
.import-item-stem {
  flex: 1; min-width: 140px; font-size: 13.5px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.import-item-editor { padding: 12px 12px 4px; border-top: 1px solid var(--border); }
.imp-opt-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.imp-opt-row .form-control { flex: 1; min-width: 0; }
.import-add-row { margin: 4px 0 10px; }

/* ---------- 指定参加人员多选 ---------- */
.participant-picker {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 6px; max-height: 200px; overflow-y: auto;
  border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px;
}
.participant-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 13.5px; cursor: pointer; padding: 4px 6px; border-radius: 6px;
}
.participant-item:hover { background: var(--bg); }
.participant-item .muted-note { font-size: 12px; }

/* ---------- 看板：近期考试卡片 ---------- */
.section-title { font-size: 16px; margin: 18px 0 12px; }
.recent-exam-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}
.recent-exam-card {
  cursor: pointer; margin-bottom: 0;
  transition: border-color .15s, box-shadow .15s;
}
.recent-exam-card:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.recent-exam-card h4 { font-size: 15px; margin-bottom: 4px; word-break: break-word; }
.re-head { margin-bottom: 10px; }
.re-progress { display: flex; align-items: center; gap: 10px; }
.re-progress-label { font-size: 12.5px; color: var(--text-secondary); white-space: nowrap; }
.re-stats { display: flex; gap: 18px; margin-top: 10px; font-size: 13.5px; color: var(--text-secondary); }
.re-stats b { color: var(--primary); }

/* ---------- 考试详情：标题 / 未参加名单 ---------- */
.detail-title { font-size: 17px; }
.absent-section h3 { font-size: 15px; margin-bottom: 10px; }
.absent-list { display: flex; flex-wrap: wrap; gap: 8px; }
.absent-badge { font-weight: 500; }

/* ---------- 复核增强：工具条 / 机器判分提示 / 调分记录 ---------- */
.review-tools {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-left: auto;
}
.machine-note { font-size: 12.5px; color: var(--text-secondary); font-weight: 400; }
.sim-value { font-size: 12.5px; color: var(--text-secondary); white-space: nowrap; }
.review-log-box { margin-top: 8px; border-top: 1px dashed var(--border); padding-top: 8px; }
.review-log-item { font-size: 13px; color: var(--text-secondary); padding: 3px 0; }

/* ---------- 来源筛选下拉 ---------- */
.source-select { width: auto; }

/* ---------- 打印防护：考试内容不可打印 ---------- */
@media print {
  body.in-exam, body.in-exam * { display: none !important; }
}

/* ============================================================
   v3 新增样式（错题集 / 错题分析 / 知识点标注）
   ============================================================ */

/* ---------- 知识点徽章（teal 系，区别于题型徽章） ---------- */
.badge-kp { background: #f0fdfa; color: #0f766e; }

/* ---------- 员工端：错题集 ---------- */
.mistake-stats-card { padding: 14px 16px; }
.mistake-stats-title { font-size: 14px; font-weight: 700; margin-bottom: 10px; }
.kp-stat-row { display: flex; flex-wrap: wrap; gap: 8px; }
.kp-stat-item {
  display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap;
  border: 1px solid var(--border); border-radius: 999px;
  background: #f9fafb; padding: 5px 12px; font-size: 13px; color: var(--text-secondary);
}
.kp-stat-item .kp-stat-name {
  font-weight: 600; color: var(--text);
  max-width: 9em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.kp-stat-item .kp-stat-rate { font-variant-numeric: tabular-nums; }
/* 错误率 ≥60% 红色高亮 */
.kp-stat-item.kp-hot { border-color: #fca5a5; background: var(--danger-light); }
.kp-stat-item.kp-hot .kp-stat-name,
.kp-stat-item.kp-hot .kp-stat-nums,
.kp-stat-item.kp-hot .kp-stat-rate { color: var(--danger); font-weight: 700; }

.type-stat-strip {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--border);
}
.type-stat-chip {
  font-size: 12.5px; color: var(--text-secondary);
  background: var(--bg); border-radius: 999px; padding: 3px 10px;
  font-variant-numeric: tabular-nums;
}
.type-stat-chip.kp-hot { background: var(--danger-light); color: var(--danger); font-weight: 600; }

.mistake-filters { display: flex; gap: 10px; margin-bottom: 14px; }
.mistake-filters .form-control { flex: 1; min-width: 0; }

/* 错题卡片底部来源行（灰字） */
.mk-source {
  margin-top: 10px; padding-top: 8px; border-top: 1px dashed var(--border);
  font-size: 12.5px; color: var(--text-secondary);
}

/* ---------- 管理端：错题分析 ---------- */
.analysis-block-title { font-size: 16px; margin: 18px 0 10px; }
.admin-content .analysis-block-title:first-child,
#view .analysis-block-title:first-child { margin-top: 0; }

/* 区块一：题型错误率行（题型徽章 / 作答 / 错误 / 错误率条形） */
.type-rate-row {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 0; border-bottom: 1px dashed var(--border); flex-wrap: wrap;
}
.type-rate-row:last-child { border-bottom: none; }
.tr-type { width: 56px; flex-shrink: 0; }
.tr-count { width: 74px; font-size: 13px; color: var(--text-secondary); flex-shrink: 0; font-variant-numeric: tabular-nums; }
.type-rate-row .bar-track { flex: 1; min-width: 120px; }
.tr-rate { width: 52px; text-align: right; font-weight: 700; font-size: 14px; flex-shrink: 0; }

/* 区块二：知识点错误率排行行 */
.kp-rank-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 0; border-bottom: 1px dashed var(--border); flex-wrap: wrap;
}
.kp-rank-row:last-child { border-bottom: none; }
.kp-rank-no {
  width: 24px; height: 24px; border-radius: 50%; background: var(--bg);
  color: var(--text-secondary); font-size: 12.5px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.kp-rank-name {
  width: 118px; font-size: 14px; font-weight: 600; flex-shrink: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.kp-rank-row .bar-track { flex: 1; min-width: 140px; }
.kp-rank-rate { width: 52px; text-align: right; font-weight: 700; flex-shrink: 0; font-variant-numeric: tabular-nums; }
.kp-rank-meta {
  font-size: 12.5px; color: var(--text-secondary);
  margin-left: auto; white-space: nowrap; font-variant-numeric: tabular-nums;
}

/* 错误率条形：≥50% 橙红警示 */
.bar-fill.bar-warn { background: linear-gradient(90deg, #ea580c, #f97316); }

/* 区块三：薄弱知识点卡片 */
.weak-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.weak-card { margin-bottom: 0; border-left: 4px solid var(--danger); }
.weak-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.weak-name { font-size: 15px; word-break: break-word; }
.weak-rate { display: flex; align-items: baseline; gap: 8px; margin-bottom: 6px; }
.weak-rate b { font-size: 34px; font-weight: 800; color: var(--danger); line-height: 1.1; }
.weak-rate span { font-size: 13px; color: var(--text-secondary); }
.weak-meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }
.weak-meta b { color: var(--text); }
.weak-advice {
  font-size: 13px; color: #92400e; background: var(--warning-light);
  border-radius: var(--radius-sm); padding: 8px 10px; margin-bottom: 10px;
}
.weak-actions {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  border-top: 1px dashed var(--border); padding-top: 10px;
}
.weak-variant-box { display: flex; align-items: center; gap: 8px; }
.weak-variant-count { width: 76px; }

/* ---------- 错题分析跳转：题库导入卡片聚焦高亮 ---------- */
.tool-card.flash-highlight {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .16);
  transition: box-shadow .4s, border-color .4s;
}

/* ---------- 员工端顶栏窄屏适配（v3 新增第三个导航"错题集"后图标化，防溢出） ---------- */
@media (max-width: 560px) {
  .app-logo { font-size: 0; }                       /* 只保留 logo 图标 */
  .app-nav { gap: 2px; }
  .app-nav a { padding: 6px 8px; }
  .app-nav a .nav-text { display: none; }            /* 导航只显示图标 */
  .app-header-right .user-name { display: none; }    /* 姓名让位于操作按钮 */
}

/* ---------- 窄屏适配 ---------- */
@media (max-width: 768px) {
  .kp-rank-name { width: 100px; }
  .kp-rank-meta { margin-left: 0; white-space: normal; padding-left: 34px; }
  .type-rate-row .bar-track { min-width: 90px; }
  .weak-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  /* 员工端错题集：统计条窄屏整行展示，避免拥挤 */
  .kp-stat-item { width: 100%; justify-content: space-between; }
  .kp-stat-item .kp-stat-name { max-width: 48%; }
  .mistake-filters { flex-direction: column; gap: 8px; }
}
.question-media { margin: 14px 0 4px; }
.question-media img { display: block; max-width: min(100%, 720px); max-height: 520px; object-fit: contain; border: 1px solid var(--border, #ddd); border-radius: 8px; background: #fff; }
.question-media figcaption { margin-top: 5px; color: #6b7280; font-size: 12px; }
.math-display { display: block; overflow-x: auto; padding: 6px 0; }
.notification-card { margin-bottom: 12px; }
.notification-card.unread { border-left: 4px solid var(--primary); background: #f8fbff; }