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12+核心SKU覆盖光伏发电、储能系统、充电设备全品类，正品保障，厂家直供

function addToCart(id){ fetch("/api/products/"+id) .then(r=>r.json()) .then(data=>{ if(data.success===true){ const p=data.data; const cart=JSON.parse(localStorage.getItem("cart")||"[]"); const existing=cart.find(x=>x.id===p.id); if(existing){existing.qty+=1;}else{cart.push({id:p.id,name:p.name,price:p.price,category:p.category,qty:1});} localStorage.setItem("cart",JSON.stringify(cart)); updateCartCount(); showToast("已加入购物车"); } }); } function updateCartCount(){ const cart=JSON.parse(localStorage.getItem("cart")||"[]"); const count=cart.reduce((s,i)=>s+(i.qty||1),0); const badge=document.getElementById("cartCount"); if(badge){badge.textContent=count;badge.style.display=count>0?"inline-block":"none";} } function showToast(msg){ let t=document.getElementById("toast"); if(!t){t=document.createElement("div");t.id="toast";t.style.cssText="position:fixed;top:20px;right:20px;background:#333;color:#fff;padding:12px 24px;border-radius:8px;z-index:9999;opacity:0;transition:opacity .3s;";document.body.appendChild(t);} t.textContent=msg;t.style.opacity="1";setTimeout(()=>t.style.opacity="0",2000); }