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

    body {
        font-family: 'Roboto', sans-serif;
        font-size: 16px;
        line-height: 1.6;
        color: #ffffff;
        background: linear-gradient(135deg, #0A66C2 70%, #2D3436 30%);
        padding: 20px;
    }

    h2, h3, h4 {
        color: #FFA500;
        margin-bottom: 15px;
        position: relative;
    }

    h2::after, h3::after, h4::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: -5px;
        width: 50px;
        height: 3px;
        background: #FFA500;
        border-radius: 2px;
    }

    p {
        margin-bottom: 20px;
        color: #f0f0f0;
    }

    ul {
        list-style-type: disc;
        margin-left: 20px;
        margin-bottom: 20px;
    }

    li {
        margin-bottom: 10px;
    }

    pre {
        background: #2D3436;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #FFA500;
    }

    .module {
        padding: 40px 20px;
        margin-bottom: 40px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transition: transform 0.3s ease;
    }

    .module:hover {
        transform: translateY(-10px);
    }

    .separator {
        height: 2px;
        background: linear-gradient(to right, #0A66C2, #FFA500);
        margin: 40px 0;
        border: none;
    }

    .image-container {
        display: flex;
        justify-content: center;
        align-items: center;
        margin: 20px 0;
    }

    .image-container img {
        width: 100%;
        max-width: 320px;
        height: auto;
        border-radius: 15px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .image-container img:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 16px rgba(0,0,0,0.3);
    }

    .note {
        text-align: center;
        font-size: 18px;
        margin: 40px 0;
        color: #FFA500;
    }

    /* 按钮样式 */
    .button {
        display: inline-block;
        padding: 10px 20px;
        background-color: #FFA500;
        color: #ffffff;
        text-decoration: none;
        border-radius: 5px;
        transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .button:hover {
        background-color: #ff8c00;
        transform: scale(1.05);
    }

    /* 动画效果 */
    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    .animate-fadeIn {
        animation: fadeIn 1s ease-in-out;
    }

    /* 响应式设计 */
    @media only screen and (max-width: 1920px) {
        body {
            padding: 40px;
        }
    }

    @media only screen and (max-width: 1200px) {
        .module {
            padding: 30px 15px;
        }
    }

    @media only screen and (max-width: 768px) {
        body {
            padding: 20px;
        }

        .image-container {
            flex-direction: column;
        }

        .image-container img {
            max-width: 100%;
        }
    }

    @media only screen and (max-width: 480px) {
        h2 {
            font-size: 24px;
        }

        h3 {
            font-size: 20px;
        }

        h4 {
            font-size: 18px;
        }

        p, li {
            font-size: 15px;
        }

        .note {
            font-size: 16px;
        }
    }

    /* 文本描边 */
    .text-stroke {
        color: #ffffff;
        text-shadow: 
            -1px -1px 0 #0A66C2,  
             1px -1px 0 #0A66C2,
            -1px 1px 0 #0A66C2,
             1px 1px 0 #0A66C2;
    }

    /* 渐变光晕 */
    .gradient-halo {
        background: radial-gradient(circle, rgba(10, 102, 194, 0.6) 20%, rgba(10, 102, 194, 0.3) 80%);
        padding: 20px;
        border-radius: 10px;
        margin-bottom: 40px;
    }

    /* 字体动态变化 */
    .dynamic-weight {
        font-weight: normal;
        transition: font-weight 0.3s ease;
    }

    .dynamic-weight.bold {
        font-weight: bold;
    }

    /* 链接样式 */
    a {
        color: #FFA500;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #ff8c00;
    }