:root {
  --primary: #1890ff;
  --primary-dark: #096dd9;
  --bg: #f5f7fa;
  --border: #e8e8e8;
  --text: #333;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text);
  min-height: 100vh; display: flex; flex-direction: column;
}
.topbar {
  background: #fff; padding: 14px 24px; border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.brand { font-size: 17px; font-weight: 600; }
.user-box { font-size: 13px; color: #666; display: flex; gap: 12px; align-items: center; }
.link { color: var(--primary); text-decoration: none; }

.card {
  background: #fff; max-width: 560px; width: 92%;
  margin: 28px auto; padding: 28px; border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
}
.card h2 { font-size: 18px; margin-bottom: 8px; }
.tip { font-size: 13px; color: #999; margin-bottom: 18px; }

label { display: block; font-size: 14px; margin-bottom: 14px; color: #555; }
label em { color: #f5222d; font-style: normal; }
input, select, textarea {
  width: 100%; margin-top: 6px; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; outline: none; font-family: inherit;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }

.mobile-row { display: flex; gap: 10px; }
.mobile-row input { flex: 1; }
.mobile-row button {
  white-space: nowrap; border: 1px solid var(--primary); background: #fff;
  color: var(--primary); border-radius: 8px; padding: 0 14px; cursor: pointer; font-size: 13px;
}
.mobile-row button:disabled { border-color: #ccc; color: #ccc; cursor: not-allowed; }

.btn-primary {
  display: inline-block; width: 100%; padding: 12px; margin-top: 6px;
  background: var(--primary); color: #fff; border: none; border-radius: 8px;
  font-size: 15px; cursor: pointer; text-align: center; text-decoration: none;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost {
  display: inline-block; width: 100%; padding: 12px; margin-top: 10px;
  background: #fff; color: var(--primary); border: 1px solid var(--primary);
  border-radius: 8px; font-size: 15px; text-align: center; text-decoration: none;
}
.btn-row { display: flex; flex-direction: column; }

.msg { font-size: 13px; margin-top: 10px; color: #f5222d; min-height: 18px; }
.msg.ok { color: #52c41a; }

.foot { text-align: center; font-size: 12px; color: #bbb; padding: 20px; margin-top: auto; }

/* ===== 后台 ===== */
.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table th, .admin-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; }
.admin-table th { background: #fafafa; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 10px; }
.badge.ok { background: #f6ffed; color: #52c41a; }
.badge.err { background: #fff1f0; color: #f5222d; }
.admin-nav { display: flex; gap: 4px; margin: 0 auto; max-width: 1000px; padding: 12px 16px; flex-wrap: wrap; }
.admin-nav a {
  padding: 8px 16px; border-radius: 8px; color: #555; text-decoration: none; font-size: 14px; background: #fff;
}
.admin-nav a.on { background: var(--primary); color: #fff; }
.admin-wrap { max-width: 1000px; width: 94%; margin: 20px auto; background: #fff; border-radius: 12px; padding: 24px; box-shadow: 0 2px 12px rgba(0,0,0,.06); }
.inline-form { display: inline; }
.mini-btn { padding: 4px 10px; font-size: 12px; border-radius: 6px; border: 1px solid var(--border); background: #fff; cursor: pointer; }
.mini-btn.danger { color: #f5222d; border-color: #ffa39e; }