:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --primary: #1677ff;
  --primary-hover: #4096ff;
  --success: #52c41a;
  --danger: #ff4d4f;
  --warning: #faad14;
  --text: #1f2329;
  --text-sub: #646a73;
  --border: #e5e6eb;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar-inner { display: flex; align-items: center; height: 60px; gap: 32px; }
.brand { font-size: 20px; font-weight: 700; color: var(--primary); }
.nav { display: flex; gap: 24px; flex: 1; }
.nav-link {
  text-decoration: none; color: var(--text-sub); font-size: 15px;
  padding: 6px 2px; border-bottom: 2px solid transparent;
}
.nav-link.active { color: var(--primary); border-color: var(--primary); font-weight: 600; }
.topbar-right { display: flex; align-items: center; }
.btn-cart {
  border: 1px solid var(--border); background: #fff; padding: 8px 16px;
  border-radius: 20px; cursor: pointer; font-size: 14px; position: relative;
}
.btn-cart:hover { border-color: var(--primary); color: var(--primary); }
.badge {
  background: var(--danger); color: #fff; font-size: 12px; min-width: 18px; height: 18px;
  border-radius: 9px; display: inline-flex; align-items: center; justify-content: center;
  padding: 0 5px; margin-left: 4px;
}

/* ===== 视图切换 ===== */
.view { display: none; padding: 24px 0 60px; }
.view.active { display: block; }
.view-title { font-size: 20px; margin-bottom: 20px; }

/* ===== 品类 tab ===== */
.category-tabs { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 24px; }
.cat-tab {
  border: 1px solid var(--border); background: #fff; padding: 10px 20px;
  border-radius: 22px; cursor: pointer; font-size: 14px; color: var(--text-sub);
  transition: all .2s;
}
.cat-tab:hover { border-color: var(--primary); color: var(--primary); }
.cat-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }

/* ===== 商品网格 ===== */
.product-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px;
}
.product-card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; display: flex; flex-direction: column; gap: 10px; transition: transform .2s;
}
.product-card:hover { transform: translateY(-3px); }
.pc-icon { font-size: 36px; }
.pc-name { font-size: 16px; font-weight: 600; }
.pc-desc { font-size: 13px; color: var(--text-sub); min-height: 38px; }
.pc-tag {
  display: inline-block; font-size: 12px; color: var(--primary); background: #eaf2ff;
  padding: 2px 8px; border-radius: 4px; align-self: flex-start;
}
.pc-price { font-size: 22px; font-weight: 700; color: var(--danger); }
.pc-price small { font-size: 14px; }
.pc-btn {
  border: none; background: var(--primary); color: #fff; padding: 10px; border-radius: 8px;
  cursor: pointer; font-size: 14px; font-weight: 600;
}
.pc-btn:hover { background: var(--primary-hover); }

/* ===== 购物车抽屉 ===== */
.drawer-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 200;
  opacity: 0; pointer-events: none; transition: opacity .3s;
}
.drawer-mask.show { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: -400px; width: 380px; height: 100%;
  background: #fff; z-index: 201; transition: right .3s; display: flex; flex-direction: column;
}
.drawer.show { right: 0; }
.drawer-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px; border-bottom: 1px solid var(--border);
}
.drawer-head h3 { font-size: 18px; }
.drawer-close { border: none; background: none; font-size: 28px; cursor: pointer; color: var(--text-sub); }
.cart-items { flex: 1; overflow-y: auto; padding: 16px 20px; }
.cart-empty { text-align: center; color: var(--text-sub); padding: 60px 0; }
.cart-item {
  display: flex; align-items: center; gap: 12px; padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.ci-icon { font-size: 28px; }
.ci-info { flex: 1; }
.ci-name { font-size: 14px; font-weight: 600; }
.ci-price { font-size: 13px; color: var(--danger); }
.ci-qty { display: flex; align-items: center; gap: 8px; }
.ci-qty button {
  width: 26px; height: 26px; border: 1px solid var(--border); background: #fff;
  border-radius: 6px; cursor: pointer; font-size: 14px;
}
.ci-qty span { min-width: 24px; text-align: center; font-size: 14px; }
.ci-del { border: none; background: none; color: var(--text-sub); cursor: pointer; font-size: 18px; }
.ci-del:hover { color: var(--danger); }
.cart-foot { padding: 20px; border-top: 1px solid var(--border); }
.cart-total { font-size: 16px; margin-bottom: 12px; text-align: right; }
.cart-total span { color: var(--danger); font-size: 22px; font-weight: 700; }
.btn-primary {
  width: 100%; border: none; background: var(--danger); color: #fff; padding: 14px;
  border-radius: 8px; cursor: pointer; font-size: 16px; font-weight: 700;
}
.btn-primary:hover { opacity: .9; }
.btn-primary:disabled { background: #ccc; cursor: not-allowed; }

/* ===== 弹窗 ===== */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 300;
  display: none; align-items: center; justify-content: center;
}
.modal-mask.show { display: flex; }
.modal { background: #fff; border-radius: var(--radius); width: 440px; max-width: 92vw; max-height: 85vh; overflow-y: auto; }
.modal-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px; border-bottom: 1px solid var(--border);
}
.modal-head h3 { font-size: 18px; }
.modal-close { border: none; background: none; font-size: 26px; cursor: pointer; color: var(--text-sub); }
.modal-body { padding: 24px; }

/* 支付相关 */
.pay-amount { text-align: center; padding: 16px 0; }
.pay-amount .num { font-size: 34px; font-weight: 700; color: var(--danger); }
.pay-amount .label { font-size: 13px; color: var(--text-sub); margin-top: 4px; }
.channel-list { display: flex; flex-direction: column; gap: 12px; margin: 20px 0; }
.channel-item {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  border: 2px solid var(--border); border-radius: 10px; cursor: pointer; transition: all .2s;
}
.channel-item:hover { border-color: var(--primary); }
.channel-item.selected { border-color: var(--primary); background: #f0f7ff; }
.channel-item .ch-icon { font-size: 28px; }
.channel-item .ch-name { font-size: 15px; font-weight: 600; }
.channel-item .ch-desc { font-size: 12px; color: var(--text-sub); }
.channel-item .ch-check { margin-left: auto; color: var(--primary); font-size: 20px; opacity: 0; }
.channel-item.selected .ch-check { opacity: 1; }

/* 模拟支付码 */
.mock-qr-box { text-align: center; padding: 16px 0; }
.mock-qr {
  width: 180px; height: 180px; margin: 0 auto; border: 1px solid var(--border);
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-size: 60px; background: #fafafa;
}
.mock-qr-tip { margin-top: 14px; color: var(--text-sub); font-size: 14px; }
.mock-btns { display: flex; gap: 12px; margin-top: 20px; }
.mock-btns button { flex: 1; padding: 12px; border-radius: 8px; border: none; cursor: pointer; font-size: 15px; font-weight: 600; }
.btn-success { background: var(--success); color: #fff; }
.btn-fail { background: var(--danger); color: #fff; }

/* 支付结果 */
.result-box { text-align: center; padding: 20px 0; }
.result-icon { font-size: 60px; }
.result-title { font-size: 20px; font-weight: 700; margin: 12px 0 6px; }
.result-desc { color: var(--text-sub); font-size: 14px; margin-bottom: 20px; }

/* ===== 订单列表 ===== */
.order-list { display: flex; flex-direction: column; gap: 16px; }
.order-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.order-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 12px; border-bottom: 1px solid var(--border); margin-bottom: 12px; }
.order-no { font-size: 13px; color: var(--text-sub); }
.order-status { font-size: 13px; font-weight: 600; padding: 3px 12px; border-radius: 12px; }
.status-pending { color: var(--warning); background: #fff7e6; }
.status-paid { color: var(--success); background: #f6ffed; }
.status-failed { color: var(--danger); background: #fff1f0; }
.status-cancelled { color: var(--text-sub); background: #f5f5f5; }
.order-item { display: flex; align-items: center; gap: 12px; padding: 8px 0; }
.order-item .oi-icon { font-size: 24px; }
.order-item .oi-name { flex: 1; font-size: 14px; }
.order-item .oi-qty { color: var(--text-sub); font-size: 13px; }
.order-item .oi-price { color: var(--danger); font-size: 14px; font-weight: 600; }
.order-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 12px; border-top: 1px solid var(--border); margin-top: 12px; }
.order-total { font-size: 14px; }
.order-total span { color: var(--danger); font-size: 18px; font-weight: 700; }
.order-time { font-size: 12px; color: var(--text-sub); }
.order-actions { display: flex; gap: 8px; }
.btn-sm { border: 1px solid var(--border); background: #fff; padding: 6px 14px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.btn-sm:hover { border-color: var(--primary); color: var(--primary); }
.empty-state { text-align: center; color: var(--text-sub); padding: 80px 0; font-size: 15px; }

/* ===== Toast ===== */
.toast {
  position: fixed; top: 80px; left: 50%; transform: translateX(-50%) translateY(-20px);
  background: rgba(0,0,0,0.8); color: #fff; padding: 12px 24px; border-radius: 8px;
  font-size: 14px; z-index: 400; opacity: 0; pointer-events: none; transition: all .3s;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }