/* Reset */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    /* 根变量 */
    :root {
        --deep-blue: #1e3c72;
        --purple: #2a5298;
        --white: #ffffff;
        --light-purple: #9fa8da;
        --neon-pink: #ff4081;
        --soft-blue: #4facfe;
        --background-gradient: linear-gradient(135deg, #1e3c72, #2a5298);
        --accent-gradient: linear-gradient(45deg, #6a11cb, #2575fc);
        --text-color: #ffffff;
        --font-primary: 'Roboto', sans-serif;
        --font-secondary: 'Orbitron', sans-serif;
    }

    body {
        font-family: var(--font-primary);
        color: var(--text-color);
        background: var(--background-gradient);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 20px;
        transition: background 0.5s ease;
    }

    header {
        width: 100%;
        text-align: center;
        padding: 50px 20px;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 10px;
        margin-bottom: 30px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    }

    header h1 {
        font-family: var(--font-secondary);
        font-size: 3rem;
        background: var(--accent-gradient);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        animation: textAnimation 5s linear infinite;
    }

    @keyframes textAnimation {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    main {
        width: 100%;
        max-width: 1200px;
        display: grid;
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 20px;
    }

    .article-section {
        background: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        backdrop-filter: blur(10px);
    }

    .article-section h2 {
        font-family: var(--font-secondary);
        font-size: 2.5rem;
        margin-bottom: 20px;
        background: var(--accent-gradient);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .article-section h3 {
        font-size: 1.8rem;
        margin-top: 30px;
        margin-bottom: 15px;
        color: var(--soft-blue);
    }

    .article-section h4 {
        font-size: 1.5rem;
        margin-top: 25px;
        margin-bottom: 10px;
        color: var(--neon-pink);
    }

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

    .article-section b {
        color: var(--light-purple);
    }

    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 20px;
        border-radius: 8px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        color: #f8f8f2;
        margin-bottom: 20px;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }

    table, th, td {
        border: 1px solid var(--soft-blue);
    }

    th, td {
        padding: 15px;
        text-align: left;
    }

    th {
        background: var(--soft-blue);
        color: var(--white);
    }

    .sample-data {
        background: rgba(0, 0, 0, 0.6);
        padding: 25px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        backdrop-filter: blur(8px);
    }

    .sample-data h2 {
        font-family: var(--font-secondary);
        font-size: 2rem;
        margin-bottom: 20px;
        color: var(--neon-pink);
        text-align: center;
    }

    .sample-data ul {
        list-style: none;
    }

    .sample-data ul li {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        margin-bottom: 10px;
        border-radius: 5px;
        transition: transform 0.3s ease;
    }

    .sample-data ul li:hover {
        transform: translateY(-5px);
    }

    .sample-data ul li::before {
        content: '★';
        color: var(--neon-pink);
        margin-right: 10px;
    }

    .decorative-images {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
        justify-content: center;
        margin-top: 20px;
    }

    .decorative-images img {
        width: 100px;
        height: 100px;
        border-radius: 10px;
        object-fit: cover;
        animation: float 6s ease-in-out infinite;
    }

    @keyframes float {
        0% { transform: translateY(0px); }
        50% { transform: translateY(-20px); }
        100% { transform: translateY(0px); }
    }

    .footer-note {
        margin-top: 40px;
        padding: 20px;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 10px;
        text-align: center;
        font-size: 1.2rem;
        color: var(--soft-blue);
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.5rem;
        }
        .article-section h2 {
            font-size: 2rem;
        }
        .article-section h3 {
            font-size: 1.6rem;
        }
    }

    @media (max-width: 1200px) {
        .decorative-images img {
            width: 90px;
            height: 90px;
        }
    }

    @media (max-width: 1024px) {
        main {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 768px) {
        header {
            padding: 30px 15px;
        }
        header h1 {
            font-size: 2rem;
        }
        .article-section {
            padding: 20px;
        }
        pre {
            font-size: 0.9rem;
        }
    }

    @media (max-width: 480px) {
        .decorative-images img {
            width: 80px;
            height: 80px;
        }
        .article-section h2 {
            font-size: 1.8rem;
        }
    }

    @media (max-width: 320px) {
        body {
            padding: 10px;
        }
        header h1 {
            font-size: 1.5rem;
        }
        .article-section h2 {
            font-size: 1.5rem;
        }
        .article-section p, .article-section li {
            font-size: 0.9rem;
        }
    }