:root {
            --primary-color: #1a237e;
            --secondary-color: #0d47a1;
            --accent-color: #2196f3;
            --light-blue: #e3f2fd;
            --dark-blue: #0d1b2a;
            --success-color: #2e7d32;
            --warning-color: #f9a825;
            --text-dark: #212121;
            --text-light: #757575;
            --white: #ffffff;
            --gray-light: #f5f5f5;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 2.5rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: linear-gradient(to right, var(--accent-color), var(--secondary-color));
            border-radius: 2px;
        }
        .section-title.text-center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border: none;
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
            background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
        }
        .btn-outline-primary {
            color: var(--primary-color);
            border-color: var(--primary-color);
            border-radius: 30px;
            padding: 10px 25px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        .navbar-brand i {
            color: var(--accent-color);
            margin-right: 10px;
        }
        .nav-link {
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 8px;
            padding: 8px 15px !important;
            border-radius: 20px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--white);
            background-color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(13, 27, 42, 0.85), rgba(26, 35, 126, 0.9)), url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: var(--white);
            padding: 150px 0 100px;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            color: var(--white);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            opacity: 0.9;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .feature-card {
            background: var(--white);
            border-radius: 15px;
            padding: 30px;
            height: 100%;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--light-blue), var(--accent-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
        }
        .feature-icon i {
            font-size: 1.8rem;
            color: var(--white);
        }
        .prediction-card {
            background: var(--white);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            margin-bottom: 30px;
            border: 1px solid rgba(0, 0, 0, 0.08);
        }
        .prediction-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
        }
        .prediction-header {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 15px 20px;
            font-weight: 600;
        }
        .team-logo {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--gray-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
        }
        .team-logo img {
            max-width: 80%;
            max-height: 80%;
        }
        .analysis-section {
            background-color: var(--gray-light);
            padding: 80px 0;
        }
        .chart-container {
            background: var(--white);
            border-radius: 15px;
            padding: 25px;
            box-shadow: var(--shadow);
            height: 100%;
        }
        .news-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            background: var(--white);
        }
        .news-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.12);
        }
        .news-img {
            height: 200px;
            width: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-img {
            transform: scale(1.05);
        }
        .news-content {
            padding: 20px;
        }
        .news-date {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        .friendlink {
            background-color: var(--light-blue);
            padding: 70px 0;
        }
        .flink {
            display: inline-block;
            background: var(--white);
            padding: 12px 25px;
            border-radius: 30px;
            margin: 8px;
            color: var(--text-dark);
            font-weight: 500;
            transition: var(--transition);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            text-decoration: none;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: var(--white);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            text-decoration: none;
        }
        footer {
            background-color: var(--dark-blue);
            color: var(--white);
            padding: 70px 0 30px;
        }
        .footer-links h5 {
            color: var(--white);
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 25px;
            margin-top: 50px;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .navbar-nav {
                background-color: var(--white);
                border-radius: 10px;
                padding: 15px;
                box-shadow: var(--shadow);
                margin-top: 10px;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .sticky-nav {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
            padding: 10px 0;
        }
        .stat-box {
            text-align: center;
            padding: 30px 20px;
            border-radius: 15px;
            background: var(--white);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .stat-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--accent-color);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary-color);
        }