:root {
            --primary-color: #1a1a1a;
            --secondary-color: #d4af37;
            --accent-color: #8b7355;
            --light-bg: #f9f7f4;
            --dark-text: #333333;
            --light-text: #ffffff;
            --transition: all 0.3s ease;
            --shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        body {
            font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
            color: var(--dark-text);
            line-height: 1.8;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--secondary-color) !important;
        }
        .navbar-brand span {
            color: var(--primary-color);
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--primary-color) !important;
            margin: 0 10px;
            position: relative;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover::after, .navbar-nav .nav-link.active::after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1490481651871-ab68de25d43d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            color: var(--light-text);
            padding: 150px 0 100px;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 30px;
            animation: fadeInUp 1s ease;
        }
        .hero-subtitle {
            font-size: 1.5rem;
            margin-bottom: 40px;
            animation: fadeInUp 1s ease 0.3s both;
        }
        .service-card, .project-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            border: none;
        }
        .service-card:hover, .project-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .card-icon {
            width: 80px;
            height: 80px;
            background: var(--light-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 30px auto 20px;
            color: var(--secondary-color);
            font-size: 2rem;
        }
        .hover-effect {
            transition: var(--transition);
        }
        .hover-effect:hover {
            transform: scale(1.05);
        }
        friendlink {
            display: block;
            margin-bottom: 30px;
        }
        .flink {
            display: inline-block;
            background: var(--light-bg);
            color: var(--dark-text);
            padding: 12px 24px;
            border-radius: 30px;
            margin: 5px 10px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #eaeaea;
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            border-color: var(--secondary-color);
            text-decoration: none;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 2rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeInUp 0.8s ease both;
        }
        .divider {
            height: 3px;
            width: 80px;
            background: var(--secondary-color);
            margin: 20px auto 40px;
        }
        .footer {
            background: var(--primary-color);
            color: var(--light-text);
            padding: 60px 0 20px;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .contact-info-item {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background: rgba(212, 175, 55, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            color: var(--secondary-color);
        }
        .partner-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: var(--transition);
            max-height: 60px;
            width: auto;
        }
        .partner-logo:hover {
            filter: grayscale(0%);
            opacity: 1;
        }
        .news-date {
            background: var(--secondary-color);
            color: white;
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            position: absolute;
            top: -35px;
            left: 20px;
            z-index: 2;
        }
        .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;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--accent-color);
            color: white;
        }