:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 600;
            color: var(--text-dark) !important;
            margin: 0 0.5rem;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
            transform: translateY(-2px);
        }
        .hero {
            background: linear-gradient(rgba(30, 58, 138, 0.9), rgba(220, 38, 38, 0.8)), url('https://images.unsplash.com/photo-1530103862676-de8c9debad1d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
            color: white;
            padding: 8rem 0;
            text-align: center;
        }
        .hero h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            padding: 0.8rem 2rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #b91c1c;
            transform: scale(1.05);
        }
        .section-padding {
            padding: 5rem 0;
        }
        .card {
            border: none;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }
        .card-title {
            color: var(--primary-color);
            font-weight: 700;
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background-color: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
        }
        .icon-box i {
            font-size: 2rem;
            color: white;
        }
        .stats-box {
            background-color: var(--bg-light);
            border-radius: 15px;
            padding: 2.5rem;
            text-align: center;
            transition: var(--transition);
        }
        .stats-box:hover {
            background-color: #e5e7eb;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--secondary-color);
            display: block;
        }
        .flink {
            display: inline-block;
            background-color: var(--bg-light);
            color: var(--primary-color);
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: scale(1.05);
        }
        .friendlink {
            background-color: #f0f4f8;
            border-top: 5px solid var(--accent-color);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        footer a {
            color: #dbeafe;
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: var(--accent-color);
        }
        .responsive-img {
            width: 100%;
            height: auto;
            border-radius: 15px;
            object-fit: cover;
        }
        .analysis-text {
            column-count: 2;
            column-gap: 3rem;
            text-align: justify;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .analysis-text {
                column-count: 1;
            }
            .stats-number {
                font-size: 2.5rem;
            }
        }