:root {
            --primary-color: #8b6d4f;
            --secondary-color: #f8f9fa;
            --accent-color: #d4a76a;
            --dark-color: #333;
            --light-color: #fff;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-color);
            line-height: 1.8;
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://images.unsplash.com/photo-1511285560929-80b456fea0bc?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: 150px 0;
            text-align: center;
        }
        .navbar {
            background-color: rgba(255,255,255,0.95);
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--primary-color) !important;
        }
        .nav-link {
            color: var(--dark-color) !important;
            font-weight: 500;
            margin: 0 8px;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        .section-title {
            text-align: center;
            margin-bottom: 60px;
            color: var(--primary-color);
            position: relative;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background-color: var(--accent-color);
            margin: 15px auto 0;
        }
        .service-card, .portfolio-card, .team-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .service-card:hover, .portfolio-card:hover, .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.12);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .portfolio-img {
            height: 300px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .portfolio-card:hover .portfolio-img {
            transform: scale(1.05);
        }
        .testimonial-card {
            border-left: 4px solid var(--accent-color);
            background-color: var(--secondary-color);
            padding: 30px;
            border-radius: 0 12px 12px 0;
        }
        .contact-info {
            list-style: none;
            padding-left: 0;
        }
        .contact-info li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }
        .contact-info i {
            color: var(--primary-color);
            margin-right: 15px;
            font-size: 1.2rem;
            width: 24px;
        }
        .friendlink {
            background-color: #f9f5f0;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 20px;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            padding: 8px 20px;
            border-radius: 30px;
            border: 1px solid #ddd;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        .footer {
            background-color: #222;
            color: #ccc;
            padding: 60px 0 30px;
        }
        .footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: var(--accent-color);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            z-index: 1000;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .back-to-top.show {
            opacity: 1;
        }
        .btn-custom {
            background-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            border: none;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-custom:hover {
            background-color: var(--accent-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(139, 109, 79, 0.2);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }