/* ===== 主体布局 ===== */
.main{ display:flex; gap:28px; align-items:flex-start; padding:28px 24px 60px; }


/* ===== 左侧分类 ===== */
.sidebar{
  width:250px; flex-shrink:0; background:#fff; border:1px solid var(--color-border);
  border-radius:10px; position:sticky; top:calc(var(--header-height) + 20px); overflow-y:auto;
  max-height:calc(100vh - var(--header-height) - 40px);
}
.sidebar-head{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 18px; border-bottom:1px solid var(--color-border);
  position:sticky; top:0; background:#fff; z-index:2;
}
.sidebar-head h2{ font-size:15px; font-weight:700; color:var(--color-dark); margin:0; letter-spacing:.5px; }
.close-btn{
  display:none; width:30px; height:30px; align-items:center; justify-content:center;
  border:none; background:#f4f4f4; border-radius:6px; font-size:17px; color:#666;
}
.cat-tree{ padding:6px 0; }
.cat-parent{ display:flex; align-items:center; }
.cat-item{
  display:flex; align-items:center; justify-content:space-between; flex:1;
  padding:10px 18px; font-size:14px; color:#444;
}
.cat-item:hover{ color:var(--color-primary); }
.cat-item.active{ color:var(--color-primary); font-weight:700; }
.cat-item .cnt{
  font-size:11px; color:#a5a5a5; background:#f4f4f4; border-radius:10px;
  padding:1px 8px; font-weight:400; margin-left:8px;
}
.cat-item.active .cnt{ background:rgba(214,0,0,.08); color:var(--color-primary); }
.cat-arrow{
  width:38px; height:38px; border:none; display:flex;
  align-items:center; justify-content:center; transition:transform .2s; flex-shrink:0;
  background:transparent; cursor:pointer;
}
.cat-arrow img{ width:14px; height:14px; display:block; pointer-events:none; }
li.open > .cat-parent .cat-arrow{ transform:rotate(180deg); color:var(--color-primary); }
li.open > .cat-parent .cat-arrow img{ filter:brightness(0) saturate(100%) invert(11%) sepia(87%) saturate(5713%) hue-rotate(358deg) brightness(95%) contrast(115%); }
.cat-subs{ display:none; background:#fafafa; border-top:1px solid #f2f2f2; padding:4px 0; }
li.open > .cat-subs{ display:block; }
.cat-sub{
  display:flex; align-items:center; justify-content:space-between;
  padding:8px 18px 8px 34px; font-size:13px; color:#666;
}
.cat-sub:hover{ color:var(--color-primary); }
.cat-sub.active{ color:var(--color-primary); font-weight:700; }
.sidebar-foot{ padding:14px 18px; border-top:1px solid var(--color-border); font-size:12px; color:var(--color-muted); line-height:1.7; }
.sidebar-foot a{ color:var(--color-primary); font-weight:600; }
.backdrop{ display:none; }


/* ===== 右侧产品区 ===== */
.products{ flex:1; min-width:0; }
.products-head{ display:flex; align-items:baseline; gap:14px; flex-wrap:wrap; }
.products-title{ font-size:24px; font-weight:800; color:var(--color-dark); margin:0; letter-spacing:.5px; }
.products-title::before{
  content:""; display:inline-block; width:5px; height:22px; background:var(--color-primary);
  margin-right:10px; vertical-align:-3px; border-radius:2px;
}
.products-count{ font-size:13px; color:var(--color-muted); }
.toolbar{ display:flex; justify-content:flex-end; margin:18px 0 22px; 
            position: sticky;
            top: 90px;
            z-index: 1001;

}
.layout-tabs{ display:flex; gap:4px; background:#fff; border:1px solid var(--color-border); border-radius:8px; padding:4px; 
 }
.layout-btn{
  width:36px; height:32px; border:none; background:transparent; border-radius:6px;
  color:#777; display:flex; align-items:center; justify-content:center; transition:all .15s;
}
.layout-btn:hover{ background:#f5f5f5; color:var(--color-dark); }
.layout-btn.active{ background:var(--color-dark); color:#fff; }

/* ===== 产品栅格 ===== */
.product-grid{ display:grid; gap:20px; }
.cols-1{ grid-template-columns:1fr; }
.cols-2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
.cols-3{ grid-template-columns:repeat(3,minmax(0,1fr)); }
.cols-4{ grid-template-columns:repeat(4,minmax(0,1fr)); }
.card.hidden{ display:none; }

.card{
  background:#fff; border:1px solid var(--color-border); border-radius:10px; overflow:hidden;
  display:flex; flex-direction:column; transition:box-shadow .25s, transform .25s;
}
.card:hover{ box-shadow:0 10px 24px rgba(0,0,0,.08); transform:translateY(-3px); }
.card-img{ position:relative; display:block; overflow:hidden; background:#f2f2f2; aspect-ratio:1/1; }
.card-img img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; transition:transform .45s ease; }
.card:hover .card-img img{ transform:scale(1.06); }
.card-body{ display:flex; flex-direction:column; flex:1; padding:14px 16px 16px; }
.card-tag{ font-size:11px; font-weight:700; color:var(--color-primary); text-transform:uppercase; letter-spacing:.6px; }
.card-name{ font-size:15px; font-weight:700; color:var(--color-dark); margin:7px 0 6px; line-height:1.35; }
.card-name a:hover{ color:var(--color-primary); }
.card-spec{
  font-size:12px; color:var(--color-muted); line-height:1.6; margin:0 0 12px;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
}
.card-foot{ margin-top:auto; display:flex; align-items:center; justify-content:space-between; gap:8px; }
.card-moq{ font-size:12px; color:var(--color-muted); }
.card-moq b{ color:var(--color-dark); font-weight:600; }
.btn-inquiry{
  font-size:13px; font-weight:600; color:var(--color-primary); border:1px solid var(--color-primary);
  padding:7px 16px; border-radius:5px; background:#fff; transition:all .2s; display:inline-block; white-space:nowrap;
}
.btn-inquiry:hover{ background:var(--color-primary); color:#fff; }

/* 单行一图：横向卡片 */
.cols-1 .card{ flex-direction:row; }
.cols-1 .card-img{ width:240px; flex-shrink:0; aspect-ratio:1/1; }
.cols-1 .card-body{ padding:22px 26px; }
.cols-1 .card-name{ font-size:18px; }
.cols-1 .card-spec{ -webkit-line-clamp:unset; overflow:visible; font-size:13px; }
.cols-1 .btn-inquiry{ padding:9px 22px; }


/* ===== 提示条 ===== */
.toast{
  position:fixed; left:50%; bottom:36px; transform:translateX(-50%) translateY(20px);
  background:var(--color-dark); color:#fff; font-size:13px; padding:10px 20px; border-radius:6px;
  opacity:0; pointer-events:none; transition:all .25s; z-index:300; max-width:80vw; text-align:center;
}
.toast.show{ opacity:1; transform:translateX(-50%) translateY(0); }


/* ===== 中等屏幕 ===== */
@media (max-width:1100px){
  .cols-4{ grid-template-columns:repeat(3,minmax(0,1fr)); }
}
@media (max-width:900px){
  .cols-3, .cols-4{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}


/* ===== 手机端 ===== */
@media (max-width:768px){

  .main{ flex-direction:column; gap:0; align-items:stretch; padding:16px 16px 40px; }
  .products{ width:100%; }
  .sidebar{ display:none; }
  .close-btn{ display:none; }
  .backdrop{ display:none; }

  .products-head{ gap:10px; }
  .products-title{ font-size:20px; }
  .products-title::before{ height:18px; }
  .toolbar{ margin:12px 0 14px; }
  .layout-btn[data-cols="3"], .layout-btn[data-cols="4"]{ display:none; }

  .product-grid{ gap:12px; }
  .cols-3, .cols-4{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .cols-1 .card{ flex-direction:column; }
  .cols-1 .card-img{ width:100%; aspect-ratio:16/10; }
  .cols-1 .card-body{ padding:12px 13px 14px; }
  .cols-1 .card-name{ font-size:16px; }
  .cols-1 .card-spec{ -webkit-line-clamp:2; overflow:hidden; font-size:12px; }

  .card-body{ padding:12px 13px 14px; }
  .card-name{ font-size:14px; }
  .card-moq{ font-size:11px; }
  .btn-inquiry{ font-size:12px; padding:6px 12px; }
}


/* ===== 分页 ===== */
.pager{ display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:6px; margin:28px 0 8px; }
.pager a,.pager span{ display:inline-flex; align-items:center; justify-content:center; min-width:32px; height:32px; padding:0 8px; border:1px solid #e5e5e5; background:#fff; border-radius:6px; font-size:13px; color:#555; }
.pager a:hover{ color:var(--color-primary); border-color:var(--color-primary); }
.pager span.cur{ background:var(--color-primary); border-color:var(--color-primary); color:#fff; font-weight:600; cursor:default; }

/* ===== Product Show ===== */
.ps-head{ border-bottom:1px solid #ddd; margin:26px 0 22px; }
.ps-head h2{ display:inline-block; font-size:22px; font-weight:800; color:var(--color-primary);
  border-bottom:3px solid var(--color-primary); padding-bottom:6px; margin:0; }
.ps-main{ display:flex; gap:32px; align-items:flex-start; padding:4px 0 10px; }
.ps-gallery{ flex:0 0 520px; min-width:0; max-width:100%; }
.ps-stage{ position:relative; width:520px; max-width:100%; border:1px solid var(--color-border); border-radius:6px; overflow:hidden; background:#fff; }
.ps-stage img{ width:100%; display:block; aspect-ratio:1/1; object-fit:contain; }
.ps-zoom{ position:absolute; right:10px; bottom:10px; z-index:10; background:rgba(17,17,17,.55); color:#fff; font-size:12px; padding:5px 10px; border-radius:4px; text-decoration:none; }
.ps-zoom:hover{ background:var(--color-primary); color:#fff; }
.ps-thumbs{ display:flex; gap:10px; margin-top:12px; flex-wrap:wrap; }
.ps-thumb{ width:60px; height:60px; padding:2px; border:1px solid #ddd; border-radius:4px; overflow:hidden; background:#fff; box-sizing:content-box; }
.ps-thumb.active{ border-color:var(--color-primary); }
.ps-thumb img{ width:100%; height:100%; object-fit:contain; display:block; }
.ps-info{ flex:1; min-width:0; }
.ps-title{ font-size:26px; font-weight:800; color:var(--color-dark); margin:0 0 10px; }
.ps-desc{ color:#666; line-height:1.8; font-size:14px; margin:0 0 18px; }
.ps-params{ border:1px solid var(--color-border); border-radius:6px; background:#fff; padding:16px 18px; margin:22px 0 18px; }
.ps-params-title{ font-size:15px; color:var(--color-dark); margin:0 0 12px; padding-left:10px; border-left:3px solid var(--color-primary); }
.ps-param-row{ display:flex; justify-content:space-between; align-items:center; padding:8px 0; border-bottom:1px dashed var(--color-border); font-size:13px; }
.ps-param-row:last-child{ border-bottom:none; }
.ps-param-label{ color:var(--color-muted); }
.ps-param-val{ color:var(--color-dark); font-weight:600; }
.ps-params-tip{ font-size:12px; color:var(--color-muted); margin:10px 0 0; }
.ps-inquiry{ min-width:200px; }
.ps-detail{ padding:26px 0 50px; margin-top:10px; }
.ps-detail-head{ border-bottom:1px solid #ddd; margin:0 0 22px; }
.ps-detail-title{ display:inline-block; font-size:22px; font-weight:800; color:var(--color-primary);
  border-bottom:3px solid var(--color-primary); padding-bottom:6px; margin:0; letter-spacing:1px; }
.ps-detail-content{ color:#555; line-height:1.9; font-size:14px; }
.ps-none{ padding:80px 0; text-align:center; color:var(--color-muted); }
@media (max-width:700px){
  .ps-gallery{ flex:0 0 46%; }
}
@media (max-width:560px){
  .ps-main{ flex-direction:column; }
  .ps-gallery{ flex:none; width:100%; }
}

.ps-lens{ position:absolute; left:0; top:0; width:100%; height:100%; background-repeat:no-repeat;
  display:none; pointer-events:none; z-index:9; }