:root {
            --primary-color: #2c3e50;
            --secondary-color: #c19a6b;
            --accent-color: #e74c3c;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
            padding: 1rem 0;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            color: var(--primary-color) !important;
            margin: 0 0.5rem;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(44, 62, 80, 0.85), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1445205170230-053b83016050?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 10rem 0;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            animation: fadeInUp 1s ease;
        }
        .hero-subtitle {
            font-size: 1.5rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            animation: fadeInUp 1s ease 0.3s both;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border: none;
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 30px;
            transition: var(--transition);
            color: white;
        }
        .btn-primary-custom:hover {
            background-color: #a87c4c;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            color: white;
        }
        .section-padding {
            padding: 6rem 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title h2 {
            font-size: 2.5rem;
            display: inline-block;
            padding-bottom: 1rem;
        }
        .section-title h2::after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .icon-box {
            width: 80px;
            height: 80px;
            background: rgba(193, 154, 107, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: var(--secondary-color);
            font-size: 2rem;
        }
        .bg-light-custom {
            background-color: #f9f9f9;
        }
        .process-step {
            position: relative;
            padding: 2rem;
            text-align: center;
            border-radius: 10px;
            background: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .step-number {
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .product-img {
            overflow: hidden;
            border-radius: 8px;
            height: 250px;
        }
        .product-img img {
            transition: var(--transition);
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .product-img:hover img {
            transform: scale(1.05);
        }
        .testimonial-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin: 1rem;
            height: 100%;
        }
        .testimonial-text {
            font-style: italic;
            position: relative;
            padding-left: 1.5rem;
        }
        .testimonial-text::before {
            content: '\201C';
            font-size: 4rem;
            color: var(--secondary-color);
            position: absolute;
            left: -0.5rem;
            top: -1.5rem;
            opacity: 0.3;
        }
        .client-img {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid var(--secondary-color);
        }
        .friendlink {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0;
        }
        .friendlink h2 {
            color: white;
        }
        .friendlink h2::after {
            background: var(--secondary-color);
        }
        .flink {
            display: inline-block;
            color: #ddd;
            margin: 0.5rem 1rem;
            text-decoration: none;
            transition: var(--transition);
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .flink:hover {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        footer {
            background-color: #1a252f;
            color: #bbb;
            padding-top: 3rem;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.7rem;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            width: 40px;
            height: 3px;
            background: var(--secondary-color);
            bottom: 0;
            left: 0;
        }
        .footer-link {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 0.7rem;
        }
        .footer-link:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .contact-info li {
            margin-bottom: 1rem;
            display: flex;
            align-items: flex-start;
        }
        .contact-info i {
            color: var(--secondary-color);
            margin-right: 10px;
            margin-top: 5px;
        }
        .copyright {
            background-color: #0d161f;
            padding: 1.5rem 0;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: #bbb;
            margin-right: 10px;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .section-padding {
                padding: 4rem 0;
            }
            .section-title h2 {
                font-size: 2rem;
            }
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--primary-color);
            color: white;
        }