* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, "PingFang SC", sans-serif; }
body { background-color: #f5f6f8; color: #333; }

/* 通用组件 */
.card { background: #fff; border-radius: 12px; padding: 20px; margin-bottom: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.btn { background: #ff3b5c; color: #fff; border: none; padding: 10px 20px; border-radius: 8px; cursor: pointer; font-size: 14px; text-align: center; display: inline-block; text-decoration: none;}
.btn:hover { background: #e63251; }
.btn-outline { background: #fff; color: #333; border: 1px solid #ddd; }
.input-group { margin-bottom: 15px; }
.input-group label { display: block; font-size: 14px; margin-bottom: 8px; color: #555; }
.input-group input { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 8px; font-size: 14px; outline: none; }
.input-group input:focus { border-color: #ff3b5c; }
.tag { display: inline-block; padding: 4px 10px; border-radius: 6px; font-size: 12px; }
.tag-green { background: #e6f7ed; color: #1a7f4b; }
.tag-red { background: #ffe6e6; color: #d63031; }

/* 后台布局 (截图1) */
.admin-layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #1e1f24; color: #fff; padding: 20px 0; }
.sidebar .brand { padding: 0 20px 20px; font-size: 18px; font-weight: bold; }
.sidebar a { display: block; padding: 12px 20px; color: #aaa; text-decoration: none; font-size: 14px; }
.sidebar a.active { background: #2d2f36; color: #fff; border-left: 3px solid #ff3b5c; }
.main-content { flex: 1; padding: 24px; }
.header-title { font-size: 20px; margin-bottom: 20px; font-weight: bold; }

/* 表格样式 (截图1) */
.table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; }
.table th, .table td { padding: 16px; text-align: left; border-bottom: 1px solid #eee; font-size: 14px; }
.table th { color: #888; font-weight: normal; background: #fafafa; }

/* 前端报名页 (截图2) */
.mobile-container { max-width: 500px; margin: 0 auto; padding: 20px; }
.header-banner { background: #2c1a23; color: #fff; text-align: center; padding: 40px 20px; border-radius: 0 0 20px 20px; margin-bottom: -20px;}
.price-tags span { background: #ffe6eb; color: #ff3b5c; padding: 4px 12px; border-radius: 12px; margin-right: 8px; font-size: 13px; font-weight: bold; }

/* 详情页 (截图3) */
.detail-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed #eee; font-size: 14px; }
.qr-box { border: 1px solid #eee; padding: 10px; border-radius: 8px; text-align: center; width: 140px; }
.qr-box img { width: 100%; }