/* 实习信息备案 - 全局样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #4472C4;
  --primary-dark: #2a56a0;
  --success: #70AD47;
  --danger: #e74c3c;
  --warning: #f39c12;
  --bg: #f0f4f8;
  --card: #ffffff;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --border: #dce1e8;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* 头部 */
.header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  text-align: center;
  padding: 24px 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.header h1 { font-size: 22px; font-weight: 700; }
.header p { font-size: 13px; opacity: 0.85; margin-top: 4px; }

/* 容器 */
.container {
  max-width: 680px;
  margin: 20px auto;
  padding: 0 16px 40px;
}

/* 卡片 */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 16px;
}
.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
}

/* 表单行 */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.form-row.full { grid-template-columns: 1fr; }

.form-group {
  display: flex;
  flex-direction: column;
}
.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.form-group label .required {
  color: var(--danger);
  margin-left: 2px;
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s;
  background: white;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(68,114,196,0.15);
}
.form-group input.disabled {
  background: #f5f6fa;
  color: var(--text-light);
  cursor: not-allowed;
}
.form-group textarea { resize: vertical; min-height: 60px; }

/* 提示 */
.hint {
  font-size: 11px;
  color: var(--text-light);
  margin-top: 2px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-block { width: 100%; }

/* 结果页 */
.result-box {
  text-align: center;
  padding: 32px 20px;
}
.result-box .icon { font-size: 56px; margin-bottom: 12px; }
.result-box h2 { font-size: 20px; margin-bottom: 8px; }
.result-box .order-id {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
  margin: 12px 0;
  padding: 12px;
  background: #f0f4ff;
  border-radius: 8px;
}
.result-box .qr-img { margin: 16px auto; }

/* 状态标签 */
.status-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.status-pending { background: #fff3cd; color: #856404; }
.status-approved { background: #d4edda; color: #155724; }
.status-rejected { background: #f8d7da; color: #721c24; }

/* 管理员后台 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-card .num { font-size: 28px; font-weight: 700; }
.stat-card .label { font-size: 12px; color: var(--text-light); margin-top: 4px; }
.stat-card.blue .num { color: var(--primary); }
.stat-card.green .num { color: var(--success); }
.stat-card.red .num { color: var(--danger); }
.stat-card.orange .num { color: var(--warning); }

.class-stat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--card);
  border-radius: 8px;
  margin-bottom: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.class-stat .class-name { font-weight: 600; font-size: 14px; }
.class-stat .counts { font-size: 13px; color: var(--text-light); }

/* 审核列表 */
.review-item {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.review-item .info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 12px;
}
.review-item .info div { color: var(--text); }
.review-item .info .k { color: var(--text-light); }
.review-item .actions { display: flex; gap: 8px; }

/* 标签页 */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  background: #e8ecf1;
  border-radius: 8px;
  padding: 4px;
}
.tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  border: none;
  background: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-light);
  font-family: inherit;
  transition: all 0.2s;
}
.tab.active { background: white; color: var(--primary); box-shadow: 0 1px 4px rgba(0,0,0,0.1); }

/* 响应式 */
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .review-item .info { grid-template-columns: 1fr; }
  .header h1 { font-size: 18px; }
}

/* 加载动画 */
.loading { text-align: center; padding: 40px; }
.loading .spinner {
  display: inline-block;
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 消息提示 */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  z-index: 9999;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  animation: fadeInDown 0.3s;
}
.toast-success { background: var(--success); color: white; }
.toast-error { background: var(--danger); color: white; }
@keyframes fadeInDown {
  from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* 链接 */
.link { color: var(--primary); text-decoration: none; cursor: pointer; }
.link:hover { text-decoration: underline; }

/* 隐藏 */
.hidden { display: none !important; }