/* 测验系统公共样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --bg: #f3f4f6;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,.06);
}
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}
a { color: var(--primary); text-decoration: none; }
.container { max-width: 860px; margin: 0 auto; padding: 20px 16px 60px; }

/* 顶部 */
.topbar {
  background: linear-gradient(135deg, #1e40af, #2563eb);
  color: #fff;
  padding: 18px 0;
  box-shadow: var(--shadow);
}
.topbar .inner { max-width: 860px; margin: 0 auto; padding: 0 16px; }
.topbar h1 { font-size: 19px; font-weight: 600; }
.topbar .sub { font-size: 13px; opacity: .85; margin-top: 2px; }

/* 卡片 */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 16px;
}
.card h2 { font-size: 17px; margin-bottom: 14px; }

/* 按钮 */
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 11px 26px;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
  transition: all .15s;
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: #9ca3af; cursor: not-allowed; }
.btn-outline { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-block { display: block; width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-danger { background: #fff; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: #fef2f2; }

/* 项目卡 */
.project-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 14px;
  transition: box-shadow .15s;
}
.project-item:hover { box-shadow: 0 4px 16px rgba(37,99,235,.12); }
.project-item h3 { font-size: 16px; margin-bottom: 6px; }
.project-item .meta { font-size: 13px; color: var(--text-light); margin-bottom: 10px; }
.tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 12px;
  margin-right: 6px;
}

/* 答题页 */
.quiz-header {
  position: sticky; top: 0; z-index: 10;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.quiz-header .inner { max-width: 860px; margin: 0 auto; display: flex; align-items: center; gap: 12px; }
.progress-bar { flex: 1; height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.progress-bar > i { display: block; height: 100%; background: var(--primary); width: 0; transition: width .25s; }
.progress-text { font-size: 13px; color: var(--text-light); white-space: nowrap; }

.question-block {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 16px;
}
.q-no {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  font-size: 14px;
  padding: 2px 10px;
  margin-right: 8px;
  vertical-align: middle;
}
.q-content { font-size: 16px; font-weight: 500; margin-bottom: 18px; }
.option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}
.option:hover { border-color: var(--primary); background: var(--primary-light); }
.option.selected { border-color: var(--primary); background: var(--primary-light); }
.option .radio {
  width: 20px; height: 20px;
  border: 2px solid #cbd5e1;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
  position: relative;
}
.option.selected .radio { border-color: var(--primary); }
.option.selected .radio::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--primary);
}
.option .opt-label { font-weight: 600; color: var(--primary-dark); margin-right: 4px; }

/* 结果页 */
.score-hero {
  text-align: center;
  padding: 30px 20px;
  background: linear-gradient(135deg, #1e40af, #3b82f6);
  color: #fff;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.score-hero .score { font-size: 56px; font-weight: 700; line-height: 1.1; }
.score-hero .score small { font-size: 22px; font-weight: 400; }
.score-hero .level { font-size: 17px; margin-top: 6px; }
.score-hero .stats { font-size: 14px; opacity: .9; margin-top: 12px; }
.score-stats { display: flex; gap: 12px; margin-bottom: 16px; }
.score-stat {
  flex: 1;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  text-align: center;
}
.score-stat .num { font-size: 24px; font-weight: 700; }
.score-stat .num.green { color: var(--success); }
.score-stat .num.red { color: var(--danger); }
.score-stat .label { font-size: 13px; color: var(--text-light); margin-top: 4px; }

/* 错题 */
.wrong-item {
  border: 1px solid var(--border);
  border-left: 4px solid var(--danger);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 14px;
  background: #fff;
}
.wrong-item.right { border-left-color: var(--success); }
.wrong-item .q { font-weight: 500; margin-bottom: 10px; }
.ans-line { font-size: 14px; margin: 4px 0; }
.ans-line .your { color: var(--danger); font-weight: 600; }
.ans-line .correct { color: var(--success); font-weight: 600; }
.analysis-box {
  background: #f9fafb;
  border-radius: 6px;
  padding: 10px 12px;
  margin-top: 10px;
  font-size: 14px;
  color: #374151;
}
.analysis-box b { color: var(--text); }

/* 核心问题总结 */
.summary-box {
  background: linear-gradient(135deg, #fffbeb, #fef3c7);
  border: 1px solid #fcd34d;
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.summary-box h3 { color: #92400e; font-size: 16px; margin-bottom: 10px; }
.summary-box .core {
  background: #fff;
  border-radius: 6px;
  padding: 10px 12px;
  font-weight: 600;
  color: #b45309;
  margin-bottom: 12px;
}
.summary-box .text { white-space: pre-wrap; font-size: 14px; color: #451a03; }

/* 维度统计 */
.cat-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; font-size: 14px; }
.cat-row .cat-name { width: 150px; flex-shrink: 0; }
.cat-row .cat-bar { flex: 1; height: 10px; background: var(--border); border-radius: 5px; overflow: hidden; }
.cat-row .cat-bar i { display: block; height: 100%; background: var(--success); }
.cat-row .cat-bar i.bad { background: var(--danger); }
.cat-row .cat-bar i.mid { background: var(--warning); }
.cat-row .cat-num { width: 70px; text-align: right; flex-shrink: 0; color: var(--text-light); font-size: 13px; }

/* 历史记录 */
.record-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: border-color .15s;
}
.record-item:hover { border-color: var(--primary); }
.record-item .info .title { font-weight: 500; }
.record-item .info .time { font-size: 13px; color: var(--text-light); }
.record-item .sc { font-size: 20px; font-weight: 700; color: var(--primary); }
.record-item .sc.pass { color: var(--success); }
.record-item .sc.fail { color: var(--danger); }

/* 表单 */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.form-control {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
}
.form-control:focus { outline: none; border-color: var(--primary); }
textarea.form-control { resize: vertical; min-height: 80px; }

.empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-light);
}
.muted { color: var(--text-light); font-size: 13px; }
.text-center { text-align: center; }
.mt { margin-top: 16px; }
.mb { margin-bottom: 16px; }
.hidden { display: none !important; }

/* 登录页 */
.login-wrap { max-width: 380px; margin: 60px auto; padding: 0 16px; }
.login-wrap .card { padding: 30px; }
.login-wrap h2 { text-align: center; margin-bottom: 24px; }

/* 表格通用样式（后台） */
table { min-width: 640px; width: 100%; }
.card { overflow-x: auto; }
th, td { white-space: normal; word-break: break-word; }

/* 响应式 */
@media (max-width: 600px) {
  .container { padding: 14px 12px 50px; }
  .card, .question-block { padding: 16px; }
  .score-stats { flex-direction: column; }
  .cat-row .cat-name { width: 100px; font-size: 12px; }
  .q-content { font-size: 15px; }
}