:root{
  --color-primary:#b8860b;   /* 暖金 */
  --color-text:#2b2b2b;
  --color-muted:#8a8a8a;
  --color-line:#ececec;
  --color-bg:#ffffff;
  --color-soft:#faf7f2;
  --radius:10px;
  --maxw:1180px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--color-text);
  background:var(--color-bg);
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.muted{color:var(--color-muted)}

/* 公告条 */
.announce{background:#222;color:#fff;text-align:center;font-size:13px;padding:8px 16px;letter-spacing:.5px}

/* 头部 */
.site-header{border-bottom:1px solid var(--color-line);background:#fff;position:sticky;top:0;z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.main-nav{display:flex;gap:22px;font-size:15px}
.main-nav a:hover{color:var(--color-primary)}
.logo{display:flex;flex-direction:column;align-items:center;line-height:1.1}
.logo strong{font-size:20px;letter-spacing:1px}
.logo .version{font-size:11px;color:var(--color-muted)}
.header-actions{display:flex;align-items:center;gap:16px;font-size:18px}
.cart-count{display:inline-block;min-width:18px;height:18px;padding:0 5px;font-size:11px;line-height:18px;text-align:center;background:var(--color-primary);color:#fff;border-radius:9px}
.nav-toggle{display:none;background:none;border:0;font-size:22px;cursor:pointer}

/* hero */
.hero{background:var(--color-soft);text-align:center;padding:64px 16px}
.hero-eyebrow{color:var(--color-muted);letter-spacing:2px;font-size:13px;margin:0 0 8px}
.hero h1{font-size:34px;margin:6px 0}
.hero-sub{color:var(--color-muted);margin:0 0 22px}

/* 分类入口 */
.categories{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;padding:32px 16px}
.cat{flex:1 1 140px;max-width:200px;text-align:center;padding:18px;background:var(--color-soft);border-radius:var(--radius);font-weight:600}

/* 产品 */
.products{padding:24px 16px 56px}
.products h2{text-align:center;margin:24px 0}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.product-card{border:1px solid var(--color-line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;background:#fff}
.product-thumb{position:relative;aspect-ratio:1/1;background:var(--color-soft);display:flex;align-items:center;justify-content:center}
.thumb-placeholder{color:var(--color-muted);font-size:14px;letter-spacing:1px}
.badge{position:absolute;top:8px;left:8px;background:var(--color-primary);color:#fff;font-size:11px;padding:3px 8px;border-radius:6px}
.product-card h3{font-size:15px;margin:12px 12px 4px;font-weight:500}
.price{margin:0 12px 12px;color:var(--color-primary);font-weight:600}
.price s{color:var(--color-muted);font-weight:400;margin-left:6px;font-size:13px}
.btn{display:inline-block;background:var(--color-primary);color:#fff;padding:10px 22px;border:0;border-radius:var(--radius);cursor:pointer;font-size:14px;text-align:center}
.btn:hover{opacity:.9}
.btn-small{margin:0 12px 12px;padding:8px 12px;font-size:13px}

/* 页脚 */
.site-footer{border-top:1px solid var(--color-line);background:var(--color-soft);margin-top:40px}
.footer-inner{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;padding:32px 16px}
.footer-inner nav{display:flex;flex-direction:column;gap:6px}
.copyright{flex-basis:100%;color:var(--color-muted);font-size:12px;text-align:center;margin:8px 0 0}

/* 响应式 */
@media (max-width:900px){
  .product-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .main-nav{display:none}
  .nav-toggle{display:block}
  .hero h1{font-size:26px}
}

/* 详情页 */
.product-detail{padding:16px 16px 64px}
.product-detail .back{display:inline-block;margin:8px 0 16px;color:var(--color-muted)}
.pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.pd-media{background:var(--color-soft);border-radius:var(--radius);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;overflow:hidden}
.thumb-placeholder.big{font-size:22px;letter-spacing:2px}
.pd-info h1{font-size:28px;margin:8px 0 12px}
.pd-info .badge.inline{position:static;display:inline-block;margin-bottom:8px}
.pd-info .stock{font-size:14px}
.pd-info .stock.in{color:#2a8a3a}
.pd-info .stock.out{color:#c0392b}
.pd-info .desc{color:var(--color-muted);margin:16px 0}
.pd-add{display:flex;align-items:center;gap:12px;margin-top:16px;flex-wrap:wrap}
.pd-add label{font-size:14px;color:var(--color-muted)}
.pd-add input[type=number]{width:72px;padding:8px;border:1px solid var(--color-line);border-radius:var(--radius);font-size:15px}
.pd-add button:disabled{opacity:.5;cursor:not-allowed}

/* 购物车 */
.cart-page{padding:16px 16px 64px}
.cart-table{width:100%;border-collapse:collapse;margin:16px 0}
.cart-table th,.cart-table td{padding:12px;border-bottom:1px solid var(--color-line);text-align:left}
.cart-table th{font-weight:600;color:var(--color-muted);font-size:13px}
.cart-total{font-size:18px;text-align:right;margin:16px 0}

/* 通用 */
.empty-state{text-align:center;padding:64px 16px;color:var(--color-muted)}

@media (max-width:640px){
  .pd-grid{grid-template-columns:1fr}
  .cart-table th:nth-child(2),.cart-table td:nth-child(2){display:none}
}

/* 列表页 */
.products-page{padding:16px 16px 64px}
.products-page h1{margin:16px 0}
.cat-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 24px;padding-bottom:12px;border-bottom:1px solid var(--color-line)}
.cat-tabs a{padding:6px 14px;border-radius:999px;background:var(--color-soft);font-size:14px}
.cat-tabs a:hover{opacity:.85}
.cat-tabs a.active{background:var(--color-primary);color:#fff}

/* 购物车操作 */
.cart-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end;margin-top:16px}
.cart-actions .cart-total{margin:0}
form.inline{display:inline-flex;gap:6px;align-items:center;margin:0}
.btn-mini{padding:4px 10px;font-size:12px}
.btn-ghost{background:transparent;color:var(--color-text);border:1px solid var(--color-line)}
.btn-ghost:hover{background:var(--color-soft)}
.btn.danger{background:#c0392b}
.cart-table td input[type=number]{width:56px;padding:4px 6px;border:1px solid var(--color-line);border-radius:6px;font-size:14px}

/* 结算 */
.checkout-page{padding:16px 16px 64px}
.checkout-form{display:grid;gap:24px}
.checkout-info{display:grid;gap:12px}
.checkout-info label{display:flex;flex-direction:column;gap:4px;font-size:14px;color:var(--color-muted)}
.checkout-info input,.checkout-info textarea{padding:8px 10px;border:1px solid var(--color-line);border-radius:var(--radius);font-size:15px;font-family:inherit}
.checkout-info input:focus,.checkout-info textarea:focus{outline:2px solid var(--color-primary);outline-offset:-1px}
.form-error{background:#fdecea;color:#c0392b;padding:10px 14px;border-radius:var(--radius);margin-bottom:16px}
.order-ok{background:var(--color-soft);padding:32px;border-radius:var(--radius);text-align:center}
.order-ok h2{margin-top:0}