:root {
            --primary-blue: #1a56db;
            --secondary-blue: #3b82f6;
            --dark-bg: #0f172a;
            --light-bg: #f8fafc;
            --text-dark: #1e293b;
            --text-light: #64748b;
            --accent-green: #10b981;
            --border-color: #e2e8f0;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            color: var(--text-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, .navbar-brand {
            font-weight: 700;
        }
        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
            padding-top: 1rem;
            padding-bottom: 1rem;
            transition: var(--transition);
        }
        .navbar.scrolled {
            padding-top: 0.7rem;
            padding-bottom: 0.7rem;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
        }
        .navbar-brand {
            font-size: 1.8rem;
            color: var(--primary-blue) !important;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            color: var(--text-dark) !important;
            transition: var(--transition);
            border-bottom: 2px solid transparent;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-blue) !important;
            border-bottom-color: var(--primary-blue);
        }
        .navbar-toggler {
            border: none;
            padding: 0.5rem;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #2563eb 50%, #3b82f6 100%);
            color: white;
            padding-top: 8rem;
            padding-bottom: 8rem;
            position: relative;
            overflow: hidden;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        .hero .lead {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .btn-primary {
            background-color: var(--accent-green);
            border: none;
            padding: 0.8rem 2.2rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #0da271;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
        }
        .btn-outline-light {
            border-radius: 50px;
            padding: 0.8rem 2.2rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
        }
        .feature-card {
            background: white;
            border-radius: 15px;
            padding: 2.5rem 2rem;
            height: 100%;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.02);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
            border-color: var(--secondary-blue);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(to right, var(--primary-blue), var(--secondary-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .about-bg {
            background-color: var(--light-bg);
            border-radius: 20px;
            padding: 4rem;
        }
        @media (max-width: 768px) {
            .about-bg {
                padding: 2rem;
            }
        }
        .stats-card {
            text-align: center;
            padding: 2rem;
            border-radius: 15px;
            background: white;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-blue);
            margin-bottom: 0.5rem;
            line-height: 1;
        }
        .process-step {
            position: relative;
            text-align: center;
            padding: 2rem;
        }
        .step-number {
            width: 60px;
            height: 60px;
            background: var(--accent-green);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: bold;
            margin: 0 auto 1.5rem;
            z-index: 2;
            position: relative;
        }
        .process-connector {
            position: absolute;
            top: 30px;
            left: 50%;
            width: 100%;
            height: 2px;
            background: var(--border-color);
            z-index: 1;
        }
        @media (max-width: 992px) {
            .process-connector {
                display: none;
            }
        }
        .news-card {
            border-radius: 15px;
            overflow: hidden;
            background: white;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-color);
        }
        .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }
        .news-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .news-body {
            padding: 1.8rem;
        }
        .news-date {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 0.8rem;
        }
        .footer {
            background-color: var(--dark-bg);
            color: #cbd5e1;
            padding-top: 4rem;
            padding-bottom: 2rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .contact-info li {
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            margin-right: 0.8rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            background: var(--primary-blue);
            transform: translateY(-5px);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        #friendlink {
            background-color: white;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 2.5rem 0;
        }
        .flink {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            background: var(--light-bg);
            border-radius: 8px;
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .flink:hover {
            background: white;
            color: var(--primary-blue);
            border-color: var(--primary-blue);
            transform: translateY(-3px);
        }
        .img-fluid {
            border-radius: 12px;
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-blue);
            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: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-blue);
            transform: translateY(-5px);
        }