* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary: #1a3a6d;
            --secondary: #e9b741;
            --accent: #3a7ca5;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
        }

        body {
            font-family: 'Noto Sans SC', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f7fa;
        }

        /* 顶部导航 */
        .navbar {
            background-color: rgba(26, 58, 109, 0.95);
            padding: 0.8rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
        }

        .logo {
            display: flex;
            align-items: center;
        }

        .logo img {
            height: 50px;
            margin-right: 12px;
        }

        .logo h1 {
            color: white;
            font-size: 1.8rem;
            font-weight: 700;
        }

        .logo span {
            color: var(--secondary);
        }

        .nav-links {
            display: flex;
            list-style: none;
        }

        .nav-links li {
            margin-left: 2rem;
        }

        .nav-links a {
            color: rgba(255, 255, 255, 0.9);
            text-decoration: none;
            font-size: 1.1rem;
            font-weight: 500;
            transition: color 0.3s;
            position: relative;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--secondary);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        /* 头部部分 */
        .header {
            background: linear-gradient(rgba(26, 58, 109, 0.85), rgba(10, 30, 60, 0.92)), url('https://images.unsplash.com/photo-1528901166007-3784c7dd3653?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 60px 2rem 0;
        }

        .header-content {
            max-width: 850px;
        }

        .header h2 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }

        .header p {
            font-size: 1.3rem;
            font-weight: 300;
            margin-bottom: 2.5rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .search-box {
            background: rgba(255, 255, 255, 0.9);
            border-radius: 50px;
            padding: 5px;
            display: flex;
            max-width: 700px;
            margin: 0 auto;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .search-box input {
            border: none;
            background: transparent;
            padding: 15px 25px;
            font-size: 1.1rem;
            width: 100%;
            outline: none;
        }

        .search-box button {
            background: var(--secondary);
            border: none;
            color: var(--primary);
            font-weight: 600;
            padding: 15px 35px;
            border-radius: 50px;
            cursor: pointer;
            font-size: 1.1rem;
            transition: all 0.3s;
        }

        .search-box button:hover {
            background: #d0a23a;
            transform: scale(1.02);
        }

        .stats {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 50px;
            max-width: 800px;
        }

        .stat-item {
            background: rgba(255, 255, 255, 0.12);
            margin: 0.8rem;
            padding: 1.5rem;
            border-radius: 10px;
            min-width: 160px;
            transition: transform 0.3s;
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-5px);
        }

        .stat-item .number {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .stat-item .label {
            font-size: 1.1rem;
            font-weight: 300;
        }

        /* 主要内容区域 */
        .section {
            padding: 6rem 5%;
        }

        .section-title {
            text-align: center;
            margin-bottom: 4rem;
        }

        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary);
            position: relative;
            display: inline-block;
            margin-bottom: 1rem;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background: var(--secondary);
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }

        .section-title p {
            color: var(--gray);
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }

        /* 钻机分类 */
        .drill-categories {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .category-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            position: relative;
        }

        .category-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }

        .category-img {
            height: 200px;
            overflow: hidden;
        }

        .category-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .category-card:hover .category-img img {
            transform: scale(1.05);
        }

        .category-content {
            padding: 1.8rem;
        }

        .category-content h3 {
            font-size: 1.6rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .category-content p {
            color: var(--gray);
            margin-bottom: 1.5rem;
        }

        .category-content a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
        }

        .category-content a i {
            margin-left: 8px;
            transition: transform 0.3s;
        }

        .category-content a:hover i {
            transform: translateX(5px);
        }

        /* 生产厂家 */
        .manufacturers {
            background: #eef3f8;
        }

        .brand-logos {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2.5rem;
            align-items: center;
        }

        .brand-card {
            background: white;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: transform 0.3s;
        }

        .brand-card:hover {
            transform: translateY(-10px);
        }

        .brand-card img {
            height: 80px;
            margin-bottom: 20px;
            object-fit: contain;
        }

        .brand-card h4 {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .brand-card p {
            font-size: 0.9rem;
            color: var(--gray);
        }

        /* 精选钻机 */
        .featured-drills {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
        }

        .drill-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }

        .drill-image {
            height: 220px;
            overflow: hidden;
        }

        .drill-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .drill-card:hover .drill-image img {
            transform: scale(1.05);
        }

        .drill-details {
            padding: 1.8rem;
        }

        .drill-details h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        .drill-specs {
            display: flex;
            justify-content: space-between;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid #eee;
            padding-bottom: 1.2rem;
        }

        .spec {
            text-align: center;
        }

        .spec .value {
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--accent);
        }

        .spec .label {
            font-size: 0.9rem;
            color: var(--gray);
        }

        .manufacturer-info {
            display: flex;
            align-items: center;
            margin-bottom: 1.5rem;
        }

        .manufacturer-logo {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #eee;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            font-weight: bold;
            color: var(--accent);
        }

        .manufacturer-name {
            font-weight: 600;
        }

        .drill-card .btn {
            display: block;
            text-align: center;
            background: var(--primary);
            color: white;
            text-decoration: none;
            padding: 12px;
            border-radius: 8px;
            font-weight: 500;
            transition: background 0.3s;
        }

        .drill-card .btn:hover {
            background: #0f2a52;
        }

        /* 新闻 */
        .news {
            background: #eef3f8;
        }

        .news-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
        }

        .news-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }

        .news-card:hover {
            transform: translateY(-10px);
        }

        .news-image {
            height: 200px;
            overflow: hidden;
        }

        .news-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .news-card:hover .news-image img {
            transform: scale(1.05);
        }

        .news-content {
            padding: 1.8rem;
        }

        .news-date {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }

        .news-date i {
            margin-right: 8px;
        }

        .news-content h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .news-content p {
            color: var(--gray);
            margin-bottom: 20px;
        }

        .news-content a {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
        }

        .news-content a i {
            margin-left: 8px;
            transition: transform 0.3s;
        }

        .news-content a:hover i {
            transform: translateX(5px);
        }

        /* 资源中心 */
        .resources {
            display: flex;
            justify-content: space-between;
            background: var(--primary);
            padding: 4rem;
            border-radius: 15px;
            color: white;
            margin-top: 3rem;
        }

        .resource-content {
            flex: 1;
            max-width: 500px;
        }

        .resource-content h3 {
            font-size: 2rem;
            margin-bottom: 1.5rem;
        }

        .resource-content p {
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .resource-btn {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary);
            text-decoration: none;
            padding: 14px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.1rem;
            transition: all 0.3s;
        }

        .resource-btn:hover {
            background: #ffcc52;
            transform: translateY(-3px);
        }

        .resource-img {
            flex: 1;
            display: flex;
            justify-content: flex-end;
            align-items: center;
        }

        .resource-img img {
            max-height: 200px;
        }

        /* 页脚 */
        .footer {
            background: #0c1f3d;
            color: rgba(255, 255, 255, 0.7);
            padding: 5rem 5% 2rem;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-col h3 {
            font-size: 1.4rem;
            color: white;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 1rem;
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            width: 60px;
            height: 3px;
            background: var(--secondary);
            bottom: 0;
            left: 0;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 1rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: all 0.3s;
        }

        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }

        .footer-contact li {
            display: flex;
            margin-bottom: 1.3rem;
        }

        .footer-contact i {
            color: var(--secondary);
            font-size: 1.2rem;
            margin-right: 15px;
            margin-top: 5px;
        }

        .social-links {
            display: flex;
            margin-top: 20px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            margin-right: 15px;
            color: white;
            transition: all 0.3s;
        }

        .social-links a:hover {
            background: var(--secondary);
            transform: translateY(-5px);
        }

        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
        }

        /* 响应式 */
        @media (max-width: 992px) {
            .header h2 {
                font-size: 2.8rem;
            }

            .stats {
                flex-direction: column;
                align-items: center;
            }

            .stat-item {
                width: 250px;
            }

            .resources {
                flex-direction: column;
                gap: 2rem;
            }

            .resource-content {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .header {
                padding-top: 80px;
            }

            .header h2 {
                font-size: 2.3rem;
            }

            .section {
                padding: 4rem 2rem;
            }
        }