/* 基本样式重置 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        color: #333;
        background: linear-gradient(135deg, #004aad, #8a2be2);
        background-size: cover;
        animation: backgroundMove 15s linear infinite;
        padding: 20px;
    }

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

    header {
        text-align: center;
        padding: 50px 0;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        margin-bottom: 30px;
    }

    header h1 {
        font-size: 3em;
        color: #ff5722;
        text-transform: uppercase;
        letter-spacing: 2px;
        animation: titleFade 3s ease-in-out infinite;
    }

    @keyframes titleFade {
        0%, 100% { opacity: 1; }
        50% { opacity: 0.7; }
    }

    nav {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin-bottom: 40px;
    }

    nav a {
        color: #ffffff;
        text-decoration: none;
        font-size: 1.2em;
        padding: 10px 20px;
        background: rgba(255, 87, 34, 0.7);
        border-radius: 5px;
        transition: background 0.3s ease;
    }

    nav a:hover {
        background: rgba(255, 87, 34, 1);
    }

    .container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }

    .card {
        background: rgba(255, 255, 255, 0.2);
        padding: 20px;
        border-radius: 10px;
        position: relative;
        overflow: hidden;
        transition: transform 0.3s ease, background 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
        background: rgba(255, 255, 255, 0.3);
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 5px;
        margin-bottom: 15px;
    }

    .card h2 {
        font-size: 1.5em;
        margin-bottom: 10px;
        color: #ff5722;
    }

    .card p {
        font-size: 1em;
        line-height: 1.6;
    }

    pre {
        background: rgba(0, 0, 0, 0.7);
        color: #00ff00;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #00ff00;
    }

    footer {
        text-align: center;
        padding: 30px 0;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        margin-top: 40px;
    }

    footer p {
        color: #ffffff;
        font-size: 1em;
    }

    /* 动态网络背景 */
    .network-background {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        background: radial-gradient(circle, rgba(255,87,34,0.3), transparent);
        animation: networkMove 20s linear infinite;
    }

    @keyframes networkMove {
        from {
            transform: rotate(0deg);
        }
        to {
            transform: rotate(360deg);
        }
    }

    /* 响应式设计 */
    @media (max-width: 768px) {
        header h1 {
            font-size: 2em;
        }

        nav a {
            font-size: 1em;
            padding: 8px 16px;
        }

        .card h2 {
            font-size: 1.2em;
        }

        .card p {
            font-size: 0.9em;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.5em;
        }

        nav {
            flex-direction: column;
            gap: 10px;
        }

        .card {
            padding: 15px;
        }

        pre {
            font-size: 0.8em;
        }
    }