* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; color: #2b2b2b; background: #f6f7f9; line-height: 1.6; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* 顶栏 */
.topbar { background: #fff; border-bottom: 1px solid #ececec; position: sticky; top: 0; z-index: 10; }
.topbar-inner { display: flex; align-items: center; gap: 16px; height: 60px; }
.logo { font-size: 20px; font-weight: 700; color: #c0392b; text-decoration: none; white-space: nowrap; }
.nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.nav a { color: #444; text-decoration: none; padding: 6px 10px; border-radius: 6px; font-size: 14px; }
.nav a:hover, .nav a.active { background: #fff3f1; color: #c0392b; }
.btn { display: inline-block; background: #c0392b; color: #fff; text-decoration: none; padding: 8px 16px; border-radius: 8px; font-size: 14px; border: none; cursor: pointer; }
.btn:hover { background: #a93226; }
.btn-lead { white-space: nowrap; }

/* 主区 */
main.wrap { padding-top: 24px; padding-bottom: 40px; }
.hero { background: linear-gradient(135deg, #c0392b, #e67e22); color: #fff; border-radius: 16px; padding: 40px 28px; margin-bottom: 28px; }
.hero h1 { font-size: 30px; margin-bottom: 10px; }
.hero p { font-size: 16px; opacity: .95; margin-bottom: 18px; }
.hero .btn { background: #fff; color: #c0392b; }

/* 卡片网格 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card { background: #fff; border: 1px solid #eee; border-radius: 14px; padding: 20px; }
.card h3 { color: #c0392b; margin-bottom: 10px; font-size: 18px; }
.card .price { font-size: 24px; font-weight: 700; color: #222; margin: 8px 0; }
.card .meta { color: #888; font-size: 13px; }
.card ul { margin: 8px 0 0 18px; font-size: 14px; color: #555; }

.section-title { font-size: 22px; margin: 28px 0 14px; color: #222; }
.section-title small { font-size: 13px; color: #999; font-weight: normal; }

/* 留资表单 */
.lead-box { background: #fff; border: 1px solid #eee; border-radius: 14px; padding: 24px; max-width: 520px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 14px; margin-bottom: 6px; color: #444; }
.field input, .field select, .field textarea { width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 8px; font-size: 14px; }
.field textarea { resize: vertical; min-height: 80px; }
.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-ok { background: #eafaf1; color: #1e7e4f; border: 1px solid #b8e6c9; }
.alert-err { background: #fdecea; color: #c0392b; border: 1px solid #f5b7b1; }

/* 页脚 */
.footer { background: #2b2b2b; color: #ccc; margin-top: 40px; padding: 24px 0; }
.footer .brand-line { color: #fff; font-weight: 600; margin-bottom: 6px; }
.footer .muted { font-size: 13px; color: #999; }
.footer .muted + .muted { margin-top: 4px; }

/* 后台 */
.admin-table { width: 100%; border-collapse: collapse; background: #fff; font-size: 14px; }
.admin-table th, .admin-table td { border: 1px solid #eee; padding: 8px 10px; text-align: left; }
.admin-table th { background: #fafafa; }
.kpi { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.kpi .box { background: #fff; border: 1px solid #eee; border-radius: 12px; padding: 16px 22px; }
.kpi .num { font-size: 26px; font-weight: 700; color: #c0392b; }

/* ===================== 移动端 H5 优化（仅 ≤768px 生效，桌面不变） ===================== */
.fab-lead { display: none; }

@media (max-width: 768px) {
  .wrap { max-width: 100%; padding: 0 14px; }
  main.wrap { padding-top: 16px; padding-bottom: 96px; }

  /* 顶栏：第一行 logo + 留资；第二行导航横向滑动 */
  .topbar { position: sticky; top: 0; }
  .topbar-inner { flex-wrap: wrap; height: auto; padding: 8px 0; gap: 6px; }
  .logo { font-size: 18px; }
  .topbar .btn-lead { margin-left: auto; padding: 7px 13px; font-size: 13px; }
  .nav {
    order: 3; width: 100%;
    display: flex;
    flex-wrap: nowrap; overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 4px;
    border-top: 1px solid #f1f1f1;
    padding-top: 8px; margin-top: 4px;
  }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { flex: 0 0 auto; flex-shrink: 0; white-space: nowrap; padding: 7px 13px; font-size: 14px; }

  /* 主视觉 */
  .hero { padding: 26px 20px; border-radius: 14px; margin-bottom: 22px; }
  .hero h1 { font-size: 23px; }
  .hero p { font-size: 15px; }

  /* 卡片单列 */
  .grid { grid-template-columns: 1fr; gap: 12px; }
  .card { padding: 18px; border-radius: 12px; }
  .card h3 { font-size: 17px; }
  .card .price { font-size: 22px; }
  .section-title { font-size: 20px; margin: 22px 0 12px; }

  /* 表单字段放大，防 iPhone 缩放 */
  .lead-box { max-width: 100%; padding: 18px; }
  .field label { font-size: 15px; }
  .field input, .field select, .field textarea { font-size: 16px; padding: 12px 14px; }

  /* 主 CTA 按钮全宽大点击区（顶栏按钮除外） */
  .hero .btn, .lead-box .btn, main.wrap > p .btn, main.wrap > .btn {
    display: block; width: 100%; text-align: center;
    padding: 13px 20px; font-size: 16px;
  }

  /* 右下角悬浮留资按钮 */
  .fab-lead {
    display: flex; align-items: center; gap: 6px;
    position: fixed; right: 16px; bottom: 20px; z-index: 60;
    background: #c0392b; color: #fff; text-decoration: none;
    padding: 13px 22px; border-radius: 30px;
    font-size: 15px; font-weight: 600;
    box-shadow: 0 6px 18px rgba(192,57,43,.42);
  }
  .fab-lead:active { transform: scale(.96); }
}