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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>NetStore 网络设备商城 - Demo</title>
<style>
  :root{
    --primary:#1a73e8;
    --primary-dark:#185abc;
    --dark:#1f2937;
    --gray:#6b7280;
    --light:#f3f4f6;
    --border:#e5e7eb;
    --success:#16a34a;
    --radius:12px;
  }
  *{margin:0;padding:0;box-sizing:border-box;font-family:"Microsoft YaHei",-apple-system,Segoe UI,Helvetica,Arial,sans-serif;}
  body{background:var(--light);color:var(--dark);}

  /* 顶部导航 */
  .topbar{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--border);}
  .topbar-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:24px;padding:14px 20px;}
  .logo{font-size:20px;font-weight:700;color:var(--primary);display:flex;align-items:center;gap:8px;}
  .logo-badge{width:34px;height:34px;border-radius:8px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;}
  .nav{display:flex;gap:6px;flex:1;}
  .nav a{padding:8px 16px;border-radius:20px;text-decoration:none;color:var(--gray);font-weight:500;transition:.2s;}
  .nav a:hover{background:var(--light);}
  .nav a.active{color:var(--primary);background:#e8f0fe;}
  .top-actions{display:flex;align-items:center;gap:10px;}
  .top-actions .cart{padding:8px 14px;border-radius:20px;background:var(--light);text-decoration:none;color:var(--dark);font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px;}
  .badge{background:var(--primary);color:#fff;border-radius:10px;font-size:11px;padding:1px 6px;}
  .btn{display:inline-block;padding:8px 18px;border-radius:20px;background:var(--primary);color:#fff;border:none;cursor:pointer;font-size:14px;font-weight:600;text-decoration:none;transition:.2s;}
  .btn:hover{background:var(--primary-dark);}
  .btn-outline{background:#fff;color:var(--primary);border:1px solid var(--primary);}
  .btn-sm{padding:6px 12px;font-size:13px;}
  .btn-lg{padding:12px 28px;font-size:16px;border-radius:10px;}
  .btn-gray{background:#e5e7eb;color:#374151;}
  .btn-gray:hover{background:#d1d5db;}

  /* Hero */
  .hero{background:linear-gradient(135deg,#1a73e8,#0f3d91);color:#fff;padding:64px 20px;text-align:center;}
  .hero h1{font-size:38px;margin-bottom:14px;}
  .hero p{font-size:17px;opacity:.9;max-width:680px;margin:0 auto;}
  .hero-cats{display:flex;gap:16px;justify-content:center;margin-top:28px;flex-wrap:wrap;}
  .cat-chip{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);padding:10px 22px;border-radius:24px;font-weight:600;cursor:pointer;transition:.2s;}
  .cat-chip:hover,.cat-chip.active{background:#fff;color:var(--primary);}

  /* 布局容器 */
  .container{max-width:1200px;margin:0 auto;padding:28px 20px;}
  .section-title{font-size:22px;font-weight:700;margin-bottom:20px;display:flex;align-items:center;gap:10px;}
  .section-title .sub{font-size:14px;color:var(--gray);font-weight:400;}

  /* 搜索 */
  .search-bar{display:flex;gap:12px;margin-bottom:24px;align-items:center;}
  .search-bar input{flex:1;padding:12px 18px;border-radius:24px;border:1px solid var(--border);font-size:15px;outline:none;}
  .search-bar input:focus{border-color:var(--primary);}
  .sort-select{padding:10px 14px;border-radius:10px;border:1px solid var(--border);font-size:14px;}

  /* 商品卡片 */
  .grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;}
  .card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.2s;display:flex;flex-direction:column;}
  .card:hover{box-shadow:0 10px 30px rgba(0,0,0,.10);transform:translateY(-3px);}
  .card-img{height:150px;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:10px;}
  .card-img img{max-width:100%;max-height:100%;object-fit:contain;}
  .card-body{padding:16px;display:flex;flex-direction:column;flex:1;gap:8px;}
  .card-tag{font-size:12px;color:var(--primary);background:#e8f0fe;padding:3px 8px;border-radius:12px;align-self:flex-start;font-weight:600;}
  .card-name{font-size:16px;font-weight:700;}
  .card-spec{font-size:13px;color:var(--gray);line-height:1.5;flex:1;}
  .card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:8px;}
  .price{font-size:20px;font-weight:800;color:var(--primary);}
  .price small{font-size:12px;color:var(--gray);font-weight:400;}
  .nego{color:var(--gray);font-size:13px;}

  /* 详情弹窗 */
  .overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:100;display:none;align-items:flex-start;justify-content:center;overflow:auto;padding:40px 16px;}
  .overlay.show{display:flex;}
  .modal{background:#fff;border-radius:16px;max-width:780px;width:100%;padding:28px;position:relative;animation:pop .25s;}
  @keyframes pop{from{transform:translateY(20px);opacity:0}to{transform:none;opacity:1}}
  .modal-close{position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:50%;background:var(--light);border:none;font-size:18px;cursor:pointer;color:var(--gray);}
  .modal-close:hover{background:var(--border);}
  .modal-head{display:flex;gap:20px;margin-bottom:20px;}
  .modal-img{width:150px;height:150px;background:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0;padding:10px;border:1px solid var(--border);}
  .modal-img img{max-width:100%;max-height:100%;object-fit:contain;}
  .modal-title{font-size:20px;font-weight:700;margin-bottom:6px;}
  .modal-tag{font-size:12px;color:var(--primary);background:#e8f0fe;padding:3px 10px;border-radius:12px;display:inline-block;font-weight:600;}
  .modal-price{font-size:26px;font-weight:800;color:var(--primary);margin-top:8px;}
  .modal-price small{color:var(--gray);font-weight:400;font-size:13px;}
  .param-grid{background:var(--light);border-radius:10px;padding:14px;margin:16px 0;display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .param-grid div{font-size:14px;}
  .param-grid b{color:var(--gray);font-weight:600;margin-right:6px;}

  /* 选型配置 */
  .config-sec{margin-top:18px;}
  .config-sec h4{font-size:16px;margin-bottom:12px;display:flex;justify-content:space-between;align-items:center;}
  .config-options{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px;}
  .opt{border:1px solid var(--border);border-radius:10px;padding:8px 14px;cursor:pointer;font-size:14px;transition:.15s;background:#fff;}
  .opt:hover{border-color:var(--primary);}
  .opt.selected{border-color:var(--primary);background:#e8f0fe;color:var(--primary);font-weight:600;}
  .opt small{color:var(--gray);font-weight:400;}
  .qty-row{display:flex;align-items:center;gap:12px;margin:16px 0;}
  .qty-row label{font-weight:600;}
  .qty-box{display:flex;align-items:center;border:1px solid var(--border);border-radius:10px;overflow:hidden;}
  .qty-box button{width:36px;height:36px;border:none;background:var(--light);font-size:18px;cursor:pointer;}
  .qty-box button:hover{background:var(--border);}
  .qty-box input{width:48px;text-align:center;border:none;font-size:15px;height:36px;outline:none;}
  .total-line{background:var(--light);border-radius:10px;padding:16px;display:flex;justify-content:space-between;align-items:center;margin-top:8px;}
  .total-line .num{font-size:28px;color:var(--primary);font-weight:800;}
  .total-line .lbl{color:var(--gray);font-size:14px;}

  /* 合同生成弹窗 */
  .form-row{margin-bottom:14px;}
  .form-row label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;}
  .form-row input,.form-row select,.form-row textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:10px;font-size:14px;outline:none;font-family:inherit;}
  .form-row input:focus,.form-row textarea:focus{border-color:var(--primary);}
  .two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  .notice{background:#fff7ed;border:1px solid #fed7aa;color:#c2410c;border-radius:10px;padding:10px 14px;font-size:13px;margin:12px 0;}

  /* 合同预览 */
  .contract{font-size:14px;line-height:1.9;color:#111;}
  .contract h2{text-align:center;font-size:22px;margin-bottom:6px;}
  .contract h3{text-align:center;color:var(--gray);font-weight:400;font-size:14px;margin-bottom:20px;}
  .contract table{width:100%;border-collapse:collapse;margin:18px 0;}
  .contract table th,.contract table td{border:1px solid var(--border);padding:9px 12px;text-align:left;}
  .contract table th{background:var(--light);font-weight:600;}
  .contract .right{text-align:right;}

  /* 购物车浮窗 */
  .cart-panel{position:fixed;right:-400px;top:0;width:380px;height:100%;background:#fff;box-shadow:-10px 0 30px rgba(0,0,0,.15);z-index:120;transition:.3s;display:flex;flex-direction:column;}
  .cart-panel.open{right:0;}
  .cart-head{padding:18px 20px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-size:17px;font-weight:700;}
  .cart-items{flex:1;overflow-y:auto;padding:14px 20px;}
  .cart-item{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--border);}
  .cart-item .ci-img{width:56px;height:56px;background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0;border:1px solid var(--border);}
  .cart-item .ci-img img{max-width:100%;max-height:100%;object-fit:contain;}
  .cart-item .ci-name{font-weight:600;font-size:14px;}
  .cart-item .ci-spec{font-size:12px;color:var(--gray);margin:3px 0;}
  .cart-item .ci-price{font-weight:700;color:var(--primary);}
  .cart-item .ci-del{background:none;border:none;color:var(--gray);cursor:pointer;font-size:13px;}
  .cart-foot{padding:16px 20px;border-top:1px solid var(--border);}
  .cart-total{display:flex;justify-content:space-between;font-size:16px;margin-bottom:14px;}
  .cart-total .n{font-size:22px;color:var(--primary);font-weight:800;}
  .toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#111;color:#fff;padding:12px 24px;border-radius:10px;z-index:300;opacity:0;transition:.3s;font-size:14px;pointer-events:none;}
  .toast.show{opacity:1;}
  footer{background:var(--dark);color:#cbd5e1;padding:40px 20px;margin-top:40px;text-align:center;font-size:14px;}
</style>
</head>
<body>

<!-- 顶部导航 -->
<div class="topbar">
  <div class="topbar-inner">
    <div class="logo"><span class="logo-badge">NS</span> NetStore 网络设备</div>
    <nav class="nav">
      <a href="#" data-cat="all" class="active">全部</a>
      <a href="#" data-cat="switch">交换机</a>
      <a href="#" data-cat="server">服务器</a>
      <a href="#" data-cat="gateway">网关</a>
      <a href="#" data-cat="router">路由器</a>
    </nav>
    <div class="top-actions">
      <a href="#" class="cart" onclick="document.getElementById('cartPanel').classList.add('open');return false;">购物车 <span class="badge" id="cartCount">0</span></a>
      <a href="#" class="btn" onclick="buildContractDirect();return false;">生成合同</a>
    </div>
  </div>
</div>

<!-- Hero -->
<div class="hero">
  <h1>专业网络设备选型与合同平台</h1>
  <p>开放访问 · 即查即报 · 选型确定后一键自动生成合同。覆盖交换机、服务器、路由器、网关等全系网络硬件。</p>
  <div class="hero-cats">
    <div class="cat-chip" data-cat="switch">交换机</div>
    <div class="cat-chip" data-cat="server">服务器</div>
    <div class="cat-chip" data-cat="router">路由器</div>
    <div class="cat-chip" data-cat="gateway">网关</div>
  </div>
</div>

<!-- 商品列表 -->
<div class="container" id="catalog">
  <div class="section-title">设备选型 <span class="sub">点击设备查看详情并配置选型</span></div>
  <div class="search-bar">
    <input type="text" id="searchBox" placeholder="搜索型号、品牌、参数，如：S5735 / 48口 / 2U ..." oninput="renderCards()">
    <select class="sort-select" id="sortSel" onchange="renderCards()">
      <option value="default">默认排序</option>
      <option value="low">价格从低到高</option>
      <option value="high">价格从高到低</option>
    </select>
  </div>
  <div class="grid" id="grid"></div>
</div>

<!-- 详情/选型弹窗 -->
<div class="overlay" id="detailOverlay">
  <div class="modal">
    <button class="modal-close" onclick="closeModal()">✕</button>
    <div class="modal-head">
      <div class="modal-img" id="dImg"></div>
      <div>
        <span class="modal-tag" id="dTag"></span>
        <div class="modal-title" id="dName"></div>
        <div class="modal-price">
          <span id="dPrice"></span>
          <small id="dUnit"></small>
        </div>
      </div>
    </div>
    <div class="param-grid" id="dParams"></div>
    <div class="notice">以下为可选配置项，选择后将联动更新报价。</div>
    <div class="config-sec" id="configArea"></div>
    <div class="qty-row">
      <label>数量</label>
      <div class="qty-box">
        <button onclick="chgQty(-1)">−</button>
        <input type="number" id="dQty" value="1" min="1" onchange="calcDetail()">
        <button onclick="chgQty(1)">+</button>
      </div>
    </div>
    <div class="total-line">
      <span class="lbl">₿ 合计（含税 × {{qty}}）</span>
      <span class="num" id="dTotal">¥0</span>
    </div>
    <div style="display:flex;gap:12px;margin-top:18px;justify-content:flex-end;">
      <button class="btn btn-outline btn-lg" onclick="addToCart()">加入购物车</button>
      <button class="btn btn-lg" onclick="buildContractDirect()">立即生成合同</button>
    </div>
  </div>
</div>

<!-- 合同生成弹窗 -->
<div class="overlay" id="contractOverlay">
  <div class="modal">
    <button class="modal-close" onclick="document.getElementById('contractOverlay').classList.remove('show')">✕</button>
    <div id="contractFormArea">
      <div class="modal-title" style="font-size:20px;margin-bottom:16px;">生成采购合同</div>
      <div class="notice">客户信息已自动填入示例数据，可修改后点击"生成合同"，系统将根据选型自动生成完整合同。</div>
      <div class="two-col">
        <div class="form-row"><label>客户/单位名称 *</label><input id="cName" placeholder="例如：某某科技有限公司"></div>
        <div class="form-row"><label>联系人 *</label><input id="cContact" placeholder="姓名"></div>
      </div>
      <div class="two-col">
        <div class="form-row"><label>联系电话 *</label><input id="cPhone" placeholder="手机号"></div>
        <div class="form-row"><label>电子邮箱</label><input id="cEmail" placeholder="邮箱"></div>
      </div>
      <div class="form-row"><label>收货地址</label><input id="cAddr" placeholder="收货地址"></div>
      <div class="two-col">
        <div class="form-row"><label>税率</label><select id="cTax"><option value="0.13">13% 增值税</option><option value="0.09">9%</option><option value="0.06">6%</option><option value="0.00">0% 不含税</option></select></div>
        <div class="form-row"><label>结算方式</label><select id="cPay"><option>对公转账</option><option>预付30%+验收70%</option><option>月结30天</option></select></div>
      </div>
      <div class="form-row"><label>备注</label><textarea id="cRemark" rows="2">