:root {
            --primary-color: #1a56db;
            --secondary-color: #7e3af2;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --success-color: #0e9f6e;
            --warning-color: #f59e0b;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.7;
            color: #374151;
            overflow-x: hidden;
        }
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            color: #4b5563 !important;
            transition: all 0.3s;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link:hover::after {
            width: 70%;
            left: 15%;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: all 0.3s;
            transform: translateX(-50%);
        }
        .hero-section {
            background: linear-gradient(135deg, #f0f4ff 0%, #e6f7ff 100%);
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 70%;
            height: 150%;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.08) 0%, transparent 70%);
            z-index: 0;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--dark-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .hero-subtitle {
            font-size: 1.25rem;
            color: #6b7280;
            margin-bottom: 2.5rem;
            max-width: 600px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), #3b82f6);
            border: none;
            padding: 0.875rem 2rem;
            font-weight: 600;
            border-radius: 0.5rem;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(26, 86, 219, 0.35);
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 1rem;
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        .section-subtitle {
            color: #6b7280;
            font-size: 1.125rem;
            max-width: 700px;
            margin: 0 auto 4rem;
        }
        .service-card {
            background: white;
            border-radius: 1rem;
            padding: 2.5rem;
            height: 100%;
            transition: all 0.3s;
            border: 1px solid #e5e7eb;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
            border-color: transparent;
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, #e0f2fe, #dbeafe);
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            font-size: 1.75rem;
        }
        .feature-box {
            padding: 2rem;
            background: white;
            border-radius: 1rem;
            border: 1px solid #e5e7eb;
            transition: all 0.3s;
        }
        .feature-box:hover {
            border-color: var(--primary-color);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
        }
        .project-card {
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.4s;
            background: white;
            height: 100%;
        }
        .project-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.12);
        }
        .project-img {
            height: 240px;
            object-fit: cover;
            width: 100%;
        }
        .team-card {
            text-align: center;
            padding: 2rem;
            border-radius: 1rem;
            background: white;
            border: 1px solid #e5e7eb;
            transition: all 0.3s;
        }
        .team-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
        }
        .team-img {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 1.5rem;
            border: 5px solid #f3f4f6;
        }
        .news-card {
            border-radius: 1rem;
            overflow: hidden;
            background: white;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.03);
            transition: all 0.3s;
            height: 100%;
        }
        .news-card:hover {
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.07);
            transform: translateY(-5px);
        }
        .contact-form .form-control {
            padding: 0.875rem 1.25rem;
            border: 1px solid #d1d5db;
            border-radius: 0.5rem;
            transition: all 0.3s;
        }
        .contact-form .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
        }
        .footer {
            background: var(--dark-color);
            color: #d1d5db;
            padding-top: 4rem;
        }
        .footer a {
            color: #9ca3af;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: white;
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 2rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s;
            color: #9ca3af;
        }
        .flink:hover {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 999;
            box-shadow: 0 4px 15px rgba(26, 86, 219, 0.3);
        }
        .scroll-top.active {
            opacity: 1;
            visibility: visible;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .navbar-nav {
                padding-top: 1rem;
            }
        }
        .article-content {
            font-size: 1.125rem;
            line-height: 1.9;
        }
        .article-content h3 {
            margin-top: 2.5rem;
            margin-bottom: 1.25rem;
            color: var(--dark-color);
        }
        .article-content p {
            margin-bottom: 1.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(26, 86, 219, 0.1) 0%, transparent 100%);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            border-radius: 0 0.5rem 0.5rem 0;
            margin: 2rem 0;
        }