:root {
            --primary-color: #c83c3c;
            --secondary-color: #2a5caa;
            --accent-color: #f8b739;
            --light-color: #f9f5f0;
            --dark-color: #333333;
        }
        body {
            font-family: 'Helvetica Neue', 'Microsoft YaHei', Arial, sans-serif;
            color: var(--dark-color);
            line-height: 1.8;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
        }
        .navbar-brand i {
            color: var(--accent-color);
            margin-right: 10px;
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1556909114-f6e7ad7d3136?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 180px 0 120px;
            margin-top: 76px;
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 50px;
            text-align: center;
            font-weight: 700;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary-color);
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(200, 60, 60, 0.1);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: rgba(200, 60, 60, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .process-step {
            position: relative;
            padding: 30px;
            background: var(--light-color);
            border-radius: 12px;
            text-align: center;
            height: 100%;
        }
        .step-number {
            position: absolute;
            top: -20px;
            left: -20px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.5rem;
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-img {
            transform: scale(1.05);
        }
        .partner-logo {
            height: 80px;
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s ease;
            object-fit: contain;
        }
        .partner-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .footer {
            background: #222;
            color: #aaa;
            padding-top: 60px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: var(--accent-color);
        }
        .friendlink {
            background: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: 10px;
            margin-top: 30px;
        }
        .flink {
            display: inline-block;
            padding: 8px 16px;
            margin: 5px;
            background: rgba(255,255,255,0.1);
            border-radius: 5px;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: rgba(255,255,255,0.2);
            border-color: var(--accent-color);
            transform: translateY(-3px);
        }
        .contact-info i {
            width: 40px;
            color: var(--accent-color);
            font-size: 1.2rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .news-card {
            border-left: 5px solid var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 80px;
                margin-top: 66px;
            }
            .display-4 {
                font-size: 2.2rem;
            }
        }