/* 字体导入 - 使用粗犷的无衬线体 */
        @import url('https://fonts.googleapis.com/css2?family=Black+Ops+One&family=Orbitron:wght@400;700&family=Roboto+Condensed:wght@700&display=swap');
        
        :root {
            --metal-gray: #333333;
            --metal-gray-light: #4d4d4d;
            --metal-gray-dark: #1a1a1a;
            --safety-orange: #FF7900;
            --safety-orange-light: #FF9E4F;
            --safety-orange-dark: #CC6100;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Roboto Condensed', sans-serif;
            background-color: var(--metal-gray);
            color: white;
            line-height: 1.6;
        }
        
        /* 螺栓装饰边框 */
        .bolt-border {
            position: relative;
            border: 3px solid var(--safety-orange);
            padding: 20px;
            margin: 15px 0;
        }
        
        .bolt-border::before, .bolt-border::after {
            content: "";
            position: absolute;
            width: 20px;
            height: 20px;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><circle cx="10" cy="10" r="8" fill="%23FF7900"/><polygon points="10,2 12,8 18,10 12,12 10,18 8,12 2,10 8,8" fill="%23333333"/></svg>');
            background-size: contain;
        }
        
        .bolt-border::before {
            top: -10px;
            left: -10px;
        }
        
        .bolt-border::after {
            bottom: -10px;
            right: -10px;
        }
        
        /* 导航栏 */
        header {
            background-color: var(--metal-gray-dark);
            padding: 1rem;
            border-bottom: 3px solid var(--safety-orange);
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-family: 'Black Ops One', cursive;
            font-size: 2rem;
            color: var(--safety-orange);
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 2rem;
        }
        
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: bold;
            text-transform: uppercase;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: var(--safety-orange);
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
        }
        
        .breadcrumb a {
            color: var(--safety-orange-light);
            text-decoration: none;
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        .breadcrumb span {
            margin: 0 0.5rem;
            color: #999;
        }
        
        /* 主要内容区域 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }
        
        h1 {
            font-family: 'Orbitron', sans-serif;
            color: var(--safety-orange);
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
        }
        
        /* 筛选工具栏 */
        .toolbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin: 2rem 0;
            padding: 1rem;
            background-color: var(--metal-gray-light);
        }
        
        .filter-group {
            display: flex;
            align-items: center;
        }
        
        .filter-group label {
            margin-right: 0.5rem;
            font-weight: bold;
        }
        
        select, input {
            padding: 0.5rem;
            background-color: var(--metal-gray-dark);
            color: white;
            border: 1px solid var(--safety-orange);
            margin-right: 1rem;
        }
        
        .btn {
            display: inline-block;
            background-color: var(--safety-orange);
            color: white;
            padding: 0.5rem 1rem;
            text-decoration: none;
            border: none;
            border-radius: 3px;
            font-weight: bold;
            text-transform: uppercase;
            transition: background-color 0.3s;
            cursor: pointer;
        }
        
        .btn:hover {
            background-color: var(--safety-orange-dark);
        }
        
        /* 产品列表 */
        .product-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }
        
        .product-card {
            background-color: var(--metal-gray-light);
            border-left: 5px solid var(--safety-orange);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
        }
        
        .product-image {
            height: 250px;
            background-color: var(--metal-gray-dark);
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            overflow: hidden;
        }
        
        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .product-card:hover .product-image img {
            transform: scale(1.05);
        }
        
        .product-badge {
            position: absolute;
            top: 10px;
            right: 10px;
            background-color: var(--safety-orange);
            color: var(--metal-gray-dark);
            padding: 0.3rem 0.6rem;
            font-weight: bold;
            font-size: 0.8rem;
        }
        
        .product-content {
            padding: 1.5rem;
        }
        
        .product-category {
            color: var(--safety-orange-light);
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
            text-transform: uppercase;
        }
        
        .product-title {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            font-weight: bold;
        }
        
        .product-specs {
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        
        .spec-item {
            display: flex;
            margin-bottom: 0.5rem;
        }
        
        .spec-label {
            font-weight: bold;
            margin-right: 0.5rem;
            min-width: 100px;
        }
        
        .product-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 1.5rem;
            padding-top: 1rem;
            border-top: 1px solid #555;
        }
        
        .product-price {
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--safety-orange);
        }
        
        /* 分页 */
        .pagination {
            display: flex;
            justify-content: center;
            margin: 3rem 0;
        }
        
        .page-numbers {
            display: flex;
            list-style: none;
        }
        
        .page-numbers li {
            margin: 0 0.5rem;
        }
        
        .page-numbers a {
            display: block;
            width: 40px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            background-color: var(--metal-gray-light);
            color: white;
            text-decoration: none;
            border-radius: 3px;
            transition: background-color 0.3s;
        }
        
        .page-numbers a:hover, .page-numbers .current {
            background-color: var(--safety-orange);
            color: var(--metal-gray-dark);
            font-weight: bold;
        }
        
        /* 页脚 */
        footer {
            background-color: var(--metal-gray-dark);
            padding: 2rem;
            text-align: center;
            border-top: 3px solid var(--safety-orange);
        }
        
        .footer-links {
            display: flex;
            justify-content: center;
            list-style: none;
            margin: 1rem 0;
        }
        
        .footer-links li {
            margin: 0 1rem;
        }
        
        .footer-links a {
            color: white;
            text-decoration: none;
        }
        
        .footer-links a:hover {
            color: var(--safety-orange);
        }
        
        .copyright {
            margin-top: 1rem;
            color: #999;
        }