:root {
  --primary: #2563eb;
  --primary-light: #eef2ff;
  --green: #16a34a;
  --red: #dc2626;
  --orange: #d97706;
  --bg: #f5f6f8;
  --text: #1f2329;
  --text-sub: #5a6472;
  --muted: #9aa2af;
  --border: #e5e7eb;
  --card: #ffffff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  min-height: 100vh;
}

/* 登录 */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  padding: 20px;
}
.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 36px;
  width: 380px;
  max-width: 92vw;
  text-align: center;
}
.login-logo { font-size: 48px; }
.login-title { font-size: 22px; font-weight: 700; margin-top: 8px; }
.login-sub { color: var(--muted); margin: 6px 0 24px; }
.login-tip { color: var(--muted); font-size: 12px; margin-top: 14px; }
.login-tabs { display: flex; gap: 8px; margin-bottom: 20px; background: #f3f4f6; border-radius: 8px; padding: 4px; }
.login-tab { flex: 1; padding: 8px; font-size: 14px; color: var(--text-sub); cursor: pointer; border-radius: 6px; transition: all .15s; }
.login-tab.active { background: #fff; color: var(--primary); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,0.06); }
.code-row { display: flex; gap: 10px; }
.code-row .input { flex: 1; }
.code-row .btn { white-space: nowrap; padding: 11px 14px; }

/* 布局 */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: #1f2937;
  color: #fff;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.brand { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.08); font-size: 18px; font-weight: 700; }
.nav { flex: 1; padding: 12px 0; }
.nav-item {
  display: block;
  padding: 14px 24px;
  color: #cbd5e1;
  cursor: pointer;
  text-decoration: none;
  transition: all .15s;
}
.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; }
.user-bar {
  padding: 14px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12px;
  color: #94a3b8;
}
.user-bar button {
  margin-top: 8px;
  width: 100%;
}

.content { flex: 1; padding: 24px; overflow-x: auto; }
.page-title { font-size: 20px; font-weight: 700; margin-bottom: 20px; }

/* 卡片 */
.card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.card-title { font-size: 16px; font-weight: 700; margin-bottom: 14px; }

/* 按钮/表单 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 14px;
  transition: all .15s;
}
.btn-block { width: 100%; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { opacity: .9; }
.btn-ghost { background: #fff; color: var(--text-sub); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--muted); }
.btn-green { background: var(--green); color: #fff; }
.btn-red { background: var(--red); color: #fff; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
}
.input:focus { border-color: var(--primary); }
.form-group { margin-bottom: 14px; text-align: left; }
.form-label { display: block; font-size: 13px; color: var(--text-sub); margin-bottom: 6px; }

/* 工种卡片 */
.wt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.wt-card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: all .15s;
}
.wt-card:hover { border-color: var(--primary); box-shadow: 0 4px 12px rgba(37,99,235,0.1); }
.wt-card h3 { font-size: 17px; margin-bottom: 8px; }
.wt-card p { color: var(--text-sub); font-size: 13px; margin-bottom: 12px; }
.wt-meta { display: flex; gap: 12px; font-size: 12px; color: var(--muted); }

/* 学习入口 */
.section-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.section-card {
  background: var(--card);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: all .15s;
}
.section-card:hover { border-color: var(--primary); }
.section-icon { font-size: 32px; margin-bottom: 8px; }
.section-card h4 { font-size: 15px; margin-bottom: 4px; }
.section-card span { font-size: 12px; color: var(--muted); }

/* 刷题 */
.question-card { background: var(--card); border-radius: 12px; padding: 24px; }
.q-meta { color: var(--muted); font-size: 12px; margin-bottom: 12px; }
.q-content { font-size: 16px; line-height: 1.7; margin-bottom: 18px; }
.q-content img { max-width: 100%; border-radius: 8px; margin-top: 10px; display: block; }
.option {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: all .15s;
}
.option:hover { border-color: var(--primary); background: var(--primary-light); }
.option.selected { border-color: var(--primary); background: var(--primary-light); }
.option.correct { border-color: var(--green); background: #dcfce7; }
.option.wrong { border-color: var(--red); background: #fee2e2; }
.option-key {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--bg); display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.q-actions { display: flex; justify-content: space-between; margin-top: 20px; }
.q-analysis {
  margin-top: 16px; padding: 14px; background: #f9fafb; border-radius: 8px; font-size: 13px; color: var(--text-sub);
}

/* 视频 */
.video-list { display: grid; gap: 14px; }
.video-item {
  background: var(--card); border-radius: 12px; overflow: hidden; border: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.video-item video { width: 100%; max-height: 420px; background: #000; }
.video-info { padding: 14px; }
.video-info h4 { margin-bottom: 6px; }
.video-info p { font-size: 13px; color: var(--text-sub); }
.video-progress { margin-top: 8px; height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
.video-progress i { display: block; height: 100%; background: var(--primary); }

/* 考试 */
.exam-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.exam-timer { font-size: 18px; font-weight: 700; color: var(--red); }
.answer-sheet { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.answer-sheet span {
  width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); font-size: 12px; cursor: pointer;
}
.answer-sheet span.answered { background: var(--primary); color: #fff; border-color: var(--primary); }
.answer-sheet span.current { box-shadow: 0 0 0 2px var(--orange); }

/* 表格 */
.table { width: 100%; border-collapse: collapse; table-layout: auto; }
.table th, .table td {
  padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; white-space: nowrap;
}
.table th { color: var(--text-sub); font-weight: 600; background: #f9fafb; }

/* 徽章 */
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; }
.badge-green { background: #dcfce7; color: var(--green); }
.badge-red { background: #fee2e2; color: var(--red); }
.badge-gray { background: #f3f4f6; color: var(--text-sub); }
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-yellow { background: #fef3c7; color: var(--orange); }

/* 响应式 */
@media (max-width: 768px) {
  .sidebar { width: 100%; position: fixed; bottom: 0; left: 0; flex-direction: row; height: auto; z-index: 100; }
  .brand { display: none; }
  .nav { display: flex; justify-content: space-around; padding: 0; }
  .nav-item { flex: 1; text-align: center; padding: 10px 0; font-size: 12px; }
  .user-bar { display: none; }
  .content { padding: 16px; padding-bottom: 70px; }
  .q-actions { flex-direction: column; gap: 10px; }
}

.toast {
  position: fixed; top: 24px; left: 50%; transform: translateX(-50%);
  background: #1f2937; color: #fff; padding: 10px 20px; border-radius: 8px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 2000;
}
.toast.show { opacity: 1; }

/* 收藏按钮 */
.btn-fav {
  background: transparent; border: none; font-size: 20px; color: var(--muted); cursor: pointer; padding: 0 4px;
}
.btn-fav.active { color: #f59e0b; }
.q-meta { display: flex; justify-content: space-between; align-items: center; }

/* 小按钮 */
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* 统计卡片 */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
.stat-card { background: var(--card); border-radius: 10px; padding: 16px; text-align: center; border: 1px solid var(--border); }
.stat-num { font-size: 24px; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* 学习进度 */
.progress-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.progress-block { background: #f9fafb; border-radius: 10px; padding: 14px; }
.progress-label { font-weight: 600; font-size: 13px; margin-bottom: 8px; }
.progress-bar { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; margin-bottom: 6px; }
.progress-bar i { display: block; height: 100%; background: var(--primary); border-radius: 4px; }
.progress-meta { font-size: 12px; color: var(--text-sub); }

/* 成绩趋势 */
.trend-bar { display: flex; align-items: flex-end; gap: 8px; height: 60px; }
.trend-item { flex: 1; min-width: 28px; background: var(--border); border-radius: 4px 4px 0 0; display: flex; align-items: flex-end; justify-content: center; padding-bottom: 4px; font-size: 12px; color: #fff; position: relative; }
.trend-item span { position: relative; z-index: 1; }
.trend-item.pass { background: var(--green); }
.trend-item.fail { background: var(--red); }

/* 错题本/收藏 题目列表 */
.question-mini-list { display: grid; gap: 10px; }
.question-mini { padding: 10px; background: #f9fafb; border-radius: 8px; }
.question-mini .q-title { font-size: 13px; margin-bottom: 4px; }
.question-mini .q-sub { font-size: 12px; color: var(--muted); }

/* 报告单题目 */
.report-q:last-child { border-bottom: none !important; margin-bottom: 0 !important; padding-bottom: 0 !important; }

/* 监管条线分组 */
.wt-group { margin-bottom: 24px; }
.wt-group-title { font-size: 14px; font-weight: 700; color: var(--text-sub); margin-bottom: 10px; padding-left: 10px; border-left: 4px solid var(--primary); }

/* 工具栏 */
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }

/* 资料库 */
.category-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.chip { padding: 6px 14px; border-radius: 20px; font-size: 13px; background: #f3f4f6; color: var(--text-sub); cursor: pointer; transition: all .15s; }
.chip:hover { background: var(--primary-light); color: var(--primary); }
.chip-active { background: var(--primary); color: #fff; }
.material-list { display: grid; gap: 12px; }
.material-card { border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; cursor: pointer; transition: all .15s; background: #fff; }
.material-card:hover { border-color: var(--primary); box-shadow: 0 4px 12px rgba(37,99,235,0.1); }
.material-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.material-title { font-size: 15px; font-weight: 600; color: var(--text); }
.material-summary { font-size: 13px; color: var(--text-sub); line-height: 1.6; margin-bottom: 8px; }
.material-meta { display: flex; gap: 16px; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.material-abstract { font-size: 13px; color: var(--text-sub); background: #f9fafb; border-left: 3px solid var(--primary); padding: 10px 14px; border-radius: 6px; margin-bottom: 14px; }
.material-content { font-size: 14px; line-height: 1.9; color: var(--text); }
.material-p { margin-bottom: 10px; }

/* 响应式补充 */
@media (max-width: 768px) {
  .progress-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}