/* 基础样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        color: #ffffff;
        background: linear-gradient(135deg, #0000ff, #8a2be2, #90ee90, #ffc0cb);
        background-size: 400% 400%;
        animation: gradient-animation 15s ease infinite;
        line-height: 1.6;
    }

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

    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    header {
        text-align: center;
        padding: 100px 0;
    }

    header h1 {
        font-family: 'Poppins', sans-serif;
        font-size: 48px;
        background: -webkit-linear-gradient(#0000ff, #ffc0cb);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 20px;
    }

    header p {
        font-size: 20px;
        max-width: 600px;
        margin: 0 auto;
    }

    .sections {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        margin: 50px 0;
    }

    .section {
        flex: 1 1 calc(33% - 20px);
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        margin: 10px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease;
    }

    .section:hover {
        transform: scale(1.05);
    }

    .section img {
        width: 100%;
        border-radius: 10px;
        margin-bottom: 15px;
    }

    .section h3 {
        margin-bottom: 10px;
        font-size: 24px;
        background: -webkit-linear-gradient(#0000ff, #ffc0cb);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .section p {
        font-size: 16px;
    }

    .sample-article {
        background: rgba(0, 0, 0, 0.5);
        padding: 30px;
        border-radius: 10px;
        margin: 50px 0;
    }

    .sample-article h2 {
        font-size: 32px;
        margin-bottom: 20px;
        text-align: center;
    }

    .sample-article pre {
        background: #2d2d2d;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .sample-article code {
        color: #f8f8f2;
        font-family: 'Courier New', Courier, monospace;
    }

    footer {
        text-align: center;
        padding: 20px 0;
        font-size: 14px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .section {
            flex: 1 1 calc(33% - 20px);
        }
    }

    @media (max-width: 1200px) {
        .section {
            flex: 1 1 calc(50% - 20px);
        }
    }

    @media (max-width: 768px) {
        header {
            padding: 80px 0;
        }

        .sections {
            flex-direction: column;
            align-items: center;
        }

        .section {
            flex: 1 1 100%;
            max-width: 600px;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 32px;
        }

        header p {
            font-size: 16px;
        }

        .section h3 {
            font-size: 20px;
        }

        .section p {
            font-size: 14px;
        }

        .sample-article h2 {
            font-size: 24px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 24px;
        }

        header p {
            font-size: 14px;
        }

        .section h3 {
            font-size: 18px;
        }

        .section p {
            font-size: 12px;
        }

        .sample-article h2 {
            font-size: 20px;
        }
    }

    /* 按钮样式 */
    .button {
        position: relative;
        display: inline-block;
        padding: 10px 20px;
        margin-top: 15px;
        color: #ffffff;
        background: transparent;
        border: 2px solid #ffffff;
        border-radius: 5px;
        cursor: pointer;
        overflow: hidden;
        transition: transform 0.3s ease;
    }

    .button::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        transition: width 0.4s ease, height 0.4s ease;
    }

    .button:hover::before {
        width: 200px;
        height: 200px;
    }

    .button:hover {
        transform: scale(1.05);
    }