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

        body {
            font-family: 'Inter', sans-serif;
            background-color: #ffffff;
            color: #1e293b;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 高端金属风格配色 */
        :root {
            --primary: #b87333;   /* 铜金色调合金质感 */
            --primary-dark: #9b5a2a;
            --secondary: #1e3a5f; /* 深蓝科技感 */
            --accent: #d9a13b;
            --dark-bg: #0f172a;
            --gray-light: #f8fafc;
            --gray-border: #e2e8f0;
            --text-dark: #0f172a;
            --text-muted: #475569;
        }

        /* 全局容器 */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* 导航栏 */
        .navbar {
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.03);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--gray-border);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 18px 32px;
            max-width: 1400px;
            margin: 0 auto;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            font-family: 'Playfair Display', serif;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: var(--text-dark);
            transition: 0.3s;
            font-size: 1rem;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-phone {
            background: var(--primary);
            color: white !important;
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: 0.3s;
        }
        .nav-phone:hover {
            background: var(--primary-dark);
            color: white !important;
            transform: scale(0.98);
        }
        @media (max-width: 768px) {
            .nav-container {
                flex-direction: column;
                gap: 12px;
                padding: 16px 20px;
            }
            .nav-links {
                gap: 1.2rem;
                justify-content: center;
            }
            .container {
                padding: 0 20px;
            }
        }

        /* Banner 区域 */
        .hero {
            background: linear-gradient(135deg, #0c1a2b 0%, #14273e 50%, #1a2f48 100%);
            padding: 100px 20px 110px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(circle at 20% 40%, rgba(184,115,51,0.08) 0%, transparent 50%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 700;
            color: white;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            animation: fadeUp 0.8s ease-out;
        }
        .hero .highlight {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
            display: inline-block;
        }
        .hero p {
            font-size: 1.2rem;
            color: #cbd5e1;
            max-width: 700px;
            margin: 0 auto 30px;
            animation: fadeUp 0.8s 0.1s backwards;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            flex-wrap: wrap;
            animation: fadeUp 0.8s 0.2s backwards;
        }
        .stat-item {
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(4px);
            padding: 12px 28px;
            border-radius: 60px;
            border: 1px solid rgba(255,255,255,0.15);
            font-weight: 600;
            color: #f1f5f9;
        }
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(25px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .stat-item { padding: 6px 16px; font-size: 0.85rem; }
            .hero { padding: 70px 20px; }
        }

        /* 通用章节 */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
            background: linear-gradient(120deg, var(--secondary), var(--primary));
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .section-sub {
            color: var(--text-muted);
            margin-bottom: 48px;
            font-size: 1.1rem;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }

        /* 公司介绍区域 (图文) */
        .about-grid {
            display: flex;
            gap: 48px;
            align-items: center;
            flex-wrap: wrap;
        }
        .about-text {
            flex: 1.2;
        }
        .about-text p {
            margin-bottom: 20px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .about-text strong {
            color: var(--secondary);
        }
        .about-image {
            flex: 0.8;
            text-align: center;
        }
        .about-image img {
            width: 100%;
            max-width: 600px;
            height: auto;
            border-radius: 28px;
            box-shadow: 0 25px 40px -12px rgba(0,0,0,0.2);
            transition: transform 0.4s ease;
        }
        .about-image img:hover {
            transform: scale(1.02);
        }
        .contact-badge {
            background: #f1f5f9;
            border-left: 5px solid var(--primary);
            padding: 14px 20px;
            border-radius: 18px;
            margin: 25px 0 10px;
            display: inline-block;
        }
        @media (max-width: 900px) {
            .about-grid { flex-direction: column; }
            .about-image img { max-width: 100%; }
        }

        /* 产品系列通用样式 */
        .product-category {
            margin-bottom: 80px;
        }
        .category-title {
            font-size: 1.9rem;
            font-weight: 600;
            margin-bottom: 32px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--primary);
            display: inline-block;
        }
        .product-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .product-card {
            background: white;
            border-radius: 24px;
            overflow: hidden;
            transition: all 0.35s cubic-bezier(0.2, 0, 0, 1);
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
            border: 1px solid var(--gray-border);
        }
        .product-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 25px 35px -12px rgba(0,0,0,0.12);
            border-color: var(--primary);
        }
        .product-img {
            width: 100%;
            aspect-ratio: 1 / 1;
            object-fit: cover;
            transition: 0.5s;
            background: #f2f4f8;
        }
        .product-card:hover .product-img {
            transform: scale(1.02);
        }
        .product-info {
            padding: 18px 14px 20px;
            text-align: center;
        }
        .product-name {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            letter-spacing: -0.2px;
        }
        @media (max-width: 1024px) {
            .product-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
        }
        @media (max-width: 700px) {
            .product-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 480px) {
            .product-grid { grid-template-columns: 1fr; }
        }

        /* 优势/供应链卡片 */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .cap-card {
            background: var(--gray-light);
            padding: 28px 20px;
            border-radius: 30px;
            text-align: center;
            transition: 0.2s;
            border: 1px solid transparent;
        }
        .cap-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .cap-card h4 {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .cap-card:hover {
            border-color: var(--primary);
            background: white;
            box-shadow: 0 12px 20px -10px rgba(0,0,0,0.05);
        }

        /* 底部 */
        .footer {
            background: var(--dark-bg);
            color: #94a3b8;
            padding: 48px 0 30px;
            margin-top: 40px;
        }
        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
            text-align: center;
        }
        .footer-copyright {
            margin-top: 32px;
            font-size: 0.85rem;
            border-top: 1px solid #334155;
            padding-top: 25px;
        }
        .friend-links a {
            color: #94a3b8;
            text-decoration: none;
            margin: 0 10px;
            font-size: 0.85rem;
            transition: 0.2s;
        }
        .friend-links a:hover {
            color: var(--primary);
        }
        
        /* 右下角移动电话按钮 */
        .mobile-call-btn {
            position: fixed;
            bottom: 28px;
            right: 28px;
            background: var(--primary);
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 20px rgba(0,0,0,0.3);
            z-index: 999;
            transition: all 0.3s;
            color: white;
            font-size: 1.8rem;
            text-decoration: none;
        }
        .mobile-call-btn:hover {
            background: var(--primary-dark);
            transform: scale(1.05);
        }
        @media (min-width: 769px) {
            .mobile-call-btn {
                display: none;
            }
        }
        /* 桌面端导航电话显示正常，移动端保留按钮同时导航电话可见性保留 */
        @media (max-width: 768px) {
            .nav-phone .phone-text {
                display: inline;
            }
        }
        .back2top {
            position: fixed;
            bottom: 28px;
            right: 100px;
            background: var(--secondary);
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            opacity: 0.7;
            transition: 0.2s;
            z-index: 99;
        }
        @media (max-width: 768px) {
            .back2top { right: 100px; bottom: 28px; width: 38px; height: 38px; }
            .mobile-call-btn { bottom: 28px; right: 28px; }
        }