:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --text-color: #333;
            --light-bg: #f8f9fa;
        }
        body {
            font-family: "Microsoft YaHei", "SimHei", sans-serif;
            color: var(--text-color);
            line-height: 1.6;
        }
        header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #0f1b4d 100%);
            color: white;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--accent-color) !important;
        }
        .hero-section {
            padding: 100px 0;
            background: url('https://images.unsplash.com/photo-1575361204480-aadea25e6e68?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            position: relative;
            color: white;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
        }
        .hero-content {
            position: relative;
            z-index: 1;
        }
        section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            color: var(--primary-color);
            font-weight: bold;
            position: relative;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--secondary-color);
            margin: 15px auto;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .card-img-top {
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            border-radius: 30px;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: scale(1.05);
        }
        .analysis-box {
            background: var(--light-bg);
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 30px;
            border-left: 5px solid var(--primary-color);
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background: #f1f5f9;
            border-radius: 30px;
            color: var(--primary-color);
            text-decoration: none;
            transition: all 0.3s;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background: #1e293b;
            color: white;
            padding: 50px 0 20px;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: var(--accent-color);
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin: 0 5px;
            transition: all 0.3s;
        }
        .social-icons a:hover {
            background: var(--accent-color);
            transform: rotate(15deg);
        }
        @media (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            .hero-section {
                padding: 70px 0;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }
        .prediction-highlight {
            font-size: 1.5rem;
            color: var(--secondary-color);
            font-weight: bold;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--secondary-color);
        }