/* ===================== 基础重置 ===================== */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: #333;
  background: #f5f6f8;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }

:root {
  --primary: #ff5722;
  --primary-dark: #e64a19;
  --dark: #1f2733;
  --gray: #767b85;
  --border: #e6e8eb;
}

/* ===================== 顶部 ===================== */
.topbar { background: var(--dark); color: #cfd3d9; font-size: 13px; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; height: 34px; }
.topbar-right a { margin-left: 14px; color: #cfd3d9; }
.topbar-right a:hover { color: #fff; }

.navbar { display: flex; align-items: center; justify-content: space-between; height: 64px; background: #fff; position: relative; }
.logo { font-size: 22px; font-weight: 700; color: var(--primary); flex-shrink: 0; }
.main-nav { display: flex; gap: 22px; }
.main-nav a { font-size: 15px; padding: 6px 0; }
.main-nav a:hover { color: var(--primary); }
.nav-actions .cart-link { font-size: 14px; padding: 8px 14px; border: 1px solid var(--border); border-radius: 20px; }
.nav-toggle { display: none; background: none; border: none; font-size: 26px; cursor: pointer; }

.site-header { box-shadow: 0 1px 4px rgba(0,0,0,.06); position: sticky; top: 0; z-index: 100; }

.alert { margin: 14px 0; padding: 10px 16px; border-radius: 6px; font-size: 14px; }
.alert-success { background: #e8f8ee; color: #1a8f4b; border: 1px solid #b9ecce; }
.alert-error   { background: #fdecea; color: #c0392b; border: 1px solid #f7cfc9; }
.alert-info    { background: #eaf3ff; color: #1a5fb4; border: 1px solid #cfe2ff; }

/* ===================== 首页 Banner ===================== */
.hero {
  background: linear-gradient(120deg, #ff7043, #ff5722);
  color: #fff;
  padding: 46px 0;
  margin-bottom: 28px;
}
.hero-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.hero-text h1 { font-size: 30px; margin-bottom: 10px; }
.hero-text p { opacity: .92; margin-bottom: 18px; }
.hero-btn { display: inline-block; background: #fff; color: var(--primary); padding: 10px 26px; border-radius: 24px; font-weight: 600; }

/* ===================== 分类导航条 ===================== */
.cat-strip { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 24px; }
.cat-strip a { background: #fff; border: 1px solid var(--border); padding: 8px 16px; border-radius: 20px; font-size: 14px; }
.cat-strip a.active, .cat-strip a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===================== 区块标题 ===================== */
.section { margin-bottom: 36px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 16px; }
.section-head h2 { font-size: 20px; border-left: 4px solid var(--primary); padding-left: 10px; }
.section-head .more { font-size: 13px; color: var(--gray); }

/* ===================== 商品卡片网格 ===================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.product-card {
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: box-shadow .2s, transform .2s;
  display: flex;
  flex-direction: column;
}
.product-card:hover { box-shadow: 0 8px 20px rgba(0,0,0,.08); transform: translateY(-3px); }
.product-thumb { position: relative; aspect-ratio: 4/3; background: #f0f1f3; overflow:hidden; }
.product-thumb img { width: 100%; height: 100%; object-fit: cover; }
.badge-discount { position: absolute; top: 8px; left: 8px; background: var(--primary); color: #fff; font-size: 12px; padding: 2px 8px; border-radius: 4px; }
.product-body { padding: 12px 14px 14px; flex: 1; display: flex; flex-direction: column; }
.product-name { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.product-sub { font-size: 12.5px; color: var(--gray); margin-bottom: 10px; flex: 1; }
.product-price-row { display: flex; align-items: baseline; gap: 8px; margin-bottom: 8px; }
.price-now { color: var(--primary); font-size: 19px; font-weight: 700; }
.price-old { color: #b5b8bf; font-size: 12.5px; text-decoration: line-through; }
.product-meta { font-size: 12px; color: var(--gray); display: flex; justify-content: space-between; }

/* ===================== 为什么选择我们 ===================== */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.why-item { background: #fff; padding: 20px; border-radius: 10px; border: 1px solid var(--border); text-align: center; }
.why-item .icon { font-size: 30px; margin-bottom: 10px; }
.why-item h3 { font-size: 16px; margin-bottom: 6px; }
.why-item p { font-size: 13px; color: var(--gray); }

/* ===================== 按钮 ===================== */
.btn { display: inline-block; padding: 10px 22px; border-radius: 6px; border: none; cursor: pointer; font-size: 14px; font-weight: 600; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: #fff; border: 1px solid var(--border); }
.btn-block { width: 100%; text-align: center; }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* ===================== 表单通用 ===================== */
.form-card { max-width: 420px; margin: 40px auto; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 30px; }
.form-card h2 { text-align: center; margin-bottom: 22px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: var(--gray); margin-bottom: 6px; }
.form-control { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
.form-control:focus { outline: none; border-color: var(--primary); }
.form-foot { text-align: center; margin-top: 14px; font-size: 13px; color: var(--gray); }

/* ===================== 面包屑 ===================== */
.breadcrumb { font-size: 13px; color: var(--gray); margin: 16px 0; }
.breadcrumb a:hover { color: var(--primary); }

/* ===================== 商品详情 ===================== */
.product-detail { display: flex; gap: 30px; background: #fff; padding: 24px; border-radius: 10px; border: 1px solid var(--border); margin-bottom: 24px; flex-wrap: wrap; }
.product-detail .thumb { flex: 0 0 340px; aspect-ratio: 4/3; background: #f0f1f3; border-radius: 8px; overflow: hidden; }
.product-detail .info { flex: 1; min-width: 260px; }
.product-detail h1 { font-size: 22px; margin-bottom: 10px; }
.product-detail .sub { color: var(--gray); margin-bottom: 16px; }
.price-box { background: #fff6f3; border: 1px dashed #ffccb0; border-radius: 8px; padding: 16px; margin-bottom: 18px; }
.qty-box { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.qty-box input { width: 60px; text-align: center; padding: 8px; border: 1px solid var(--border); border-radius: 6px; }
.detail-actions { display: flex; gap: 12px; }
.detail-content { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 24px; }

/* ===================== 表格通用 ===================== */
.table-wrap { background: #fff; border: 1px solid var(--border); border-radius: 10px; overflow-x: auto; }
table.simple-table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 600px; }
table.simple-table th, table.simple-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
table.simple-table th { background: #fafbfc; color: var(--gray); font-weight: 600; }
.status-tag { padding: 2px 10px; border-radius: 12px; font-size: 12px; }
.status-tag.paid { background: #e8f8ee; color: #1a8f4b; }
.status-tag.unpaid { background: #fff4e5; color: #d18b00; }
.status-tag.cancelled { background: #f1f1f1; color: #888; }

/* ===================== 会员中心布局 ===================== */
.member-layout { display: flex; gap: 24px; align-items: flex-start; }
.member-sidebar { flex: 0 0 220px; background: #fff; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.member-sidebar a { display: block; padding: 13px 18px; border-bottom: 1px solid var(--border); font-size: 14px; }
.member-sidebar a:last-child { border-bottom: none; }
.member-sidebar a.active, .member-sidebar a:hover { background: var(--primary); color: #fff; }
.member-content { flex: 1; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 24px; min-width: 0; }
.member-summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
.summary-box { background: #fff7f4; border-radius: 8px; padding: 16px; text-align: center; }
.summary-box .num { font-size: 22px; font-weight: 700; color: var(--primary); }
.summary-box .label { font-size: 12.5px; color: var(--gray); margin-top: 4px; }

/* ===================== 购物车 ===================== */
.cart-table td { vertical-align: middle; }
.cart-item-name { display: flex; align-items: center; gap: 10px; }
.cart-item-name img { width: 54px; height: 54px; border-radius: 6px; object-fit: cover; background:#f0f1f3; }
.cart-summary { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin-top: 16px; text-align: right; }
.cart-summary .total { font-size: 20px; color: var(--primary); font-weight: 700; margin: 0 10px; }

/* ===================== 签到面板 ===================== */
.checkin-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; margin: 20px 0; }
.checkin-day { border: 1px solid var(--border); border-radius: 8px; text-align: center; padding: 14px 4px; font-size: 12px; color: var(--gray); }
.checkin-day.done { background: #fff6f3; border-color: var(--primary); color: var(--primary); }

/* ===================== 卡密展示（购买成功后） ===================== */
.card-secret { background: #fbfbfb; border: 1px dashed #ccc; border-radius: 6px; padding: 10px 14px; font-family: monospace; font-size: 13px; word-break: break-all; }

/* ===================== 响应式（HTML5 自适应） ===================== */
@media (max-width: 992px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid { grid-template-columns: repeat(3, 1fr); }
  .member-summary { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .topbar-left { display: none; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute; top: 64px; left: 0; right: 0;
    background: #fff; flex-direction: column; gap: 0;
    border-top: 1px solid var(--border); box-shadow: 0 8px 12px rgba(0,0,0,.06);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 20px; border-bottom: 1px solid var(--border); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 22px; }
  .member-layout { flex-direction: column; }
  .member-sidebar { flex: none; width: 100%; display: flex; overflow-x: auto; }
  .member-sidebar a { flex: 0 0 auto; border-bottom: none; border-right: 1px solid var(--border); }
  .product-detail .thumb { flex: 0 0 100%; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .member-summary { grid-template-columns: repeat(2, 1fr); }
  .checkin-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .form-card { margin: 20px 14px; padding: 20px; }
}

/* ===================== 页脚 ===================== */
.site-footer { background: #1f2733; color: #b7bdc7; margin-top: 40px; padding-top: 30px; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding-bottom: 24px; }
.footer-col h4 { color: #fff; margin-bottom: 12px; font-size: 15px; }
.footer-col p, .footer-col li { font-size: 13px; margin-bottom: 8px; color: #99a0ab; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #333d4b; text-align: center; padding: 16px 0; font-size: 12.5px; color: #7d8492; }