/* 根变量定义 */
    :root {
        --primary-color: #0A2463;
        --secondary-color: #2E3192;
        --accent-color: #34C759;
        --highlight-color: #FF6B35;
        --background-gradient: radial-gradient(circle, #2E3192, #1BFFFF);
        --text-color: #333333;
        --font-primary: 'Roboto', sans-serif;
        --font-secondary: 'Open Sans', sans-serif;
        --card-bg: #F5F7FA;
        --shadow-color: rgba(0, 0, 0, 0.1);
        --transition-speed: 0.3s;
    }

    /* 全局样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: var(--font-secondary);
        color: var(--text-color);
        background: var(--background-gradient);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 20px;
    }

    header {
        width: 100%;
        max-width: 1200px;
        text-align: center;
        padding: 20px 0;
    }

    header h1 {
        font-family: var(--font-primary);
        font-size: 2.5rem;
        color: white;
        margin-bottom: 10px;
    }

    header p {
        font-size: 1.2rem;
        color: #FFFFFFCC;
    }

    main {
        width: 100%;
        max-width: 1200px;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        padding: 20px 0;
    }

    .card {
        background-color: var(--card-bg);
        border-radius: 12px;
        box-shadow: 0 4px 6px var(--shadow-color);
        padding: 20px;
        transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 12px var(--shadow-color);
    }

    .card img {
        width: 100px;
        height: 100px;
        object-fit: cover;
        border-radius: 50%;
        margin-bottom: 15px;
    }

    .card h3 {
        font-family: var(--font-primary);
        font-size: 1.5rem;
        color: var(--primary-color);
        margin-bottom: 10px;
        text-align: center;
    }

    .card p {
        font-size: 1rem;
        text-align: center;
        margin-bottom: 15px;
    }

    .card .data {
        font-weight: bold;
        color: var(--highlight-color);
    }

    .article-section {
        width: 100%;
        max-width: 1200px;
        background-color: rgba(255, 255, 255, 0.8);
        border-radius: 12px;
        padding: 30px;
        box-shadow: 0 4px 6px var(--shadow-color);
        margin-bottom: 20px;
    }

    .article-section h2 {
        font-family: var(--font-primary);
        font-size: 2rem;
        color: var(--primary-color);
        margin-bottom: 15px;
    }

    .article-section h3 {
        font-family: var(--font-primary);
        font-size: 1.5rem;
        color: var(--primary-color);
        margin-top: 20px;
        margin-bottom: 10px;
    }

    .article-section p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 15px;
    }

    .article-section pre {
        background-color: #272822;
        color: #f8f8f2;
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 15px;
        font-family: 'Courier New', Courier, monospace;
        font-size: 0.9rem;
    }

    footer {
        width: 100%;
        max-width: 1200px;
        text-align: center;
        padding: 20px 0;
        color: white;
        font-size: 1rem;
    }

    /* 动画效果 */
    @keyframes slideIn {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .card {
        animation: slideIn 0.5s ease forwards;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.2rem;
        }
        .card h3 {
            font-size: 1.4rem;
        }
    }

    @media (max-width: 1200px) {
        main {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        header h1 {
            font-size: 2rem;
        }
        .article-section {
            padding: 25px;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 1.8rem;
        }
        main {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }
        .card img {
            width: 80px;
            height: 80px;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.5rem;
        }
        .card {
            padding: 15px;
        }
        .article-section {
            padding: 20px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.2rem;
        }
        .card h3 {
            font-size: 1.2rem;
        }
    }