:root {
            --primary-color: #dc3545;
            --secondary-color: #1a365d;
            --accent-color: #ffc107;
            --light-bg: #f8f9fa;
            --dark-text: #333333;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-text);
            line-height: 1.6;
        }
        .header-gradient {
            background: linear-gradient(135deg, var(--secondary-color) 0%, #2c5282 100%);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.9), rgba(26, 54, 93, 0.9)), 
                        url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            transform: translateY(-10px);
            background: #ff4757;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .analysis-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: var(--transition);
            height: 100%;
        }
        .analysis-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .match-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--primary-color);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #f8f9fa;
            border-radius: 5px;
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .footer {
            background: var(--secondary-color);
            color: rgba(255,255,255,0.8);
        }
        .footer a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.1);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin: 0 5px;
            transition: var(--transition);
        }
        .social-icon:hover {
            background: var(--primary-color);
            transform: translateY(-5px);
        }
        .nav-link {
            font-weight: 500;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: var(--transition);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .btn-custom {
            background: var(--primary-color);
            color: white;
            padding: 10px 30px;
            border-radius: 30px;
            border: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .btn-custom:hover {
            background: #ff4757;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(220, 53, 69, 0.3);
        }
        .section-title {
            position: relative;
            display: inline-block;
            margin-bottom: 50px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .stat-number {
                font-size: 2.5rem;
            }
            .feature-icon {
                width: 60px;
                height: 60px;
            }
        }
        .timeline-item {
            position: relative;
            padding-left: 30px;
            margin-bottom: 30px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary-color);
        }
        .timeline-item::after {
            content: '';
            position: absolute;
            left: 5px;
            top: 17px;
            width: 2px;
            height: calc(100% + 13px);
            background: #e9ecef;
        }
        .timeline-item:last-child::after {
            display: none;
        }