/* 文件路径: frontend/css/app-additions.css
   修正版新增样式（在 app.css 之后加载，只补新增模块，不动原有样式）：
   首页数字、关于我们、三步流程、筛选栏、页脚、凭证列表、群码上传时间提示。 */

.stats-bar {
  display: flex;
  gap: 12px;
  margin: 20px 0;
}

.stat-item {
  flex: 1;
  background: #111114;
  border: 1px solid #232329;
  border-radius: 12px;
  padding: 16px 8px;
  text-align: center;
}

.stat-item strong {
  display: block;
  font-size: 28px;
  line-height: 1.2;
  color: #ffd000;
}

.stat-item span {
  font-size: 13px;
  color: #9ca3af;
}

.about-card,
.steps-card {
  margin-bottom: 16px;
}

.steps-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.steps-list li {
  border-left: 3px solid #ffd000;
  padding-left: 12px;
}

.steps-list li p {
  margin: 4px 0 0;
  color: #9ca3af;
  font-size: 14px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.filter-bar label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.site-footer {
  margin-top: 40px;
  border-top: 1px solid #232329;
  padding: 24px 0 32px;
  color: #9ca3af;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #e5e7eb;
  text-decoration: none;
}

.footer-note {
  margin-top: 16px;
  font-size: 13px;
}

.activity-cover-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111114;
  color: #ffd000;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 2px;
}

.credential-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid #232329;
}

.credential-item:last-child {
  border-bottom: none;
}

.credential-item code {
  font-size: 13px;
}

.qr-upload-box {
  border: 1px dashed #3f3f46;
  border-radius: 12px;
  padding: 12px;
}

.qr-upload-box h4 {
  margin: 0 0 8px;
}

.inline-field {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
}

.required {
  color: #f87171;
}

@media (max-width: 640px) {
  .stats-bar {
    gap: 8px;
  }
  .stat-item strong {
    font-size: 22px;
  }
}