:root {
            --primary-color: #1a56db;
            --secondary-color: #0e9f6e;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --gray-color: #6b7280;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--dark-color);
            line-height: 1.7;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 0.5rem 1rem;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(26, 86, 219, 0.95) 0%, rgba(14, 159, 110, 0.9) 100%), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            position: relative;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        .service-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            height: 100%;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(26, 86, 219, 0.15);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), #3b82f6);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .case-study-img {
            height: 300px;
            object-fit: cover;
            border-radius: 12px;
            transition: transform 0.5s ease;
        }
        .case-study-img:hover {
            transform: scale(1.03);
        }
        .team-member {
            text-align: center;
            padding: 2rem;
            border-radius: 12px;
            transition: all 0.3s ease;
        }
        .team-member:hover {
            background: rgba(26, 86, 219, 0.05);
        }
        .team-img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            margin-bottom: 1.5rem;
            border: 5px solid white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .contact-info-box {
            background: var(--light-color);
            padding: 2rem;
            border-radius: 12px;
            height: 100%;
            border-left: 4px solid var(--primary-color);
        }
        .contact-info-box i {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .friendlink {
            background: var(--light-color);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            background: white;
            border-radius: 8px;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid #e5e7eb;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(26, 86, 219, 0.2);
        }
        footer {
            background: var(--dark-color);
            color: white;
            padding: 4rem 0 2rem;
        }
        footer a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: white;
        }
        .footer-divider {
            border-top: 1px solid #374151;
            margin: 2rem 0;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 999;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #1e40af;
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 5rem 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(26, 86, 219, 0.1);
            color: var(--primary-color);
            font-weight: 600;
        }
        .blog-card {
            border-radius: 12px;
            overflow: hidden;
            transition: transform 0.3s ease;
            height: 100%;
            border: 1px solid #e5e7eb;
        }
        .blog-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
        }
        .blog-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s ease;
            max-height: 80px;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }