/* 基础样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #fff;
        line-height: 1.6;
        padding: 20px;
    }
    h2, h3, h4 {
        color: #ff77ff;
        margin-bottom: 15px;
    }
    p {
        margin-bottom: 15px;
    }
    pre, code {
        background: #2a2a2a;
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
    }
    table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 20px;
    }
    table, th, td {
        border: 1px solid #555;
    }
    th, td {
        padding: 10px;
        text-align: left;
    }
    /* 图片样式 */
    img {
        width: 100%;
        max-width: 320px;
        height: auto;
        display: block;
        margin: 20px auto;
    }
    /* 卡片样式 */
    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
        margin-bottom: 20px;
        transition: transform 0.3s;
    }
    .card:hover {
        transform: scale(1.05);
    }
    /* 按钮样式 */
    .button {
        display: inline-block;
        padding: 10px 20px;
        background: #8a2be2;
        color: #fff;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        position: relative;
        overflow: hidden;
    }
    .button::after {
        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 0.5s, height 0.5s;
    }
    .button:hover::after {
        width: 200px;
        height: 200px;
    }
    /* 响应式设计 */
    @media (max-width: 768px) {
        body {
            padding: 10px;
        }
        h2 {
            font-size: 1.5em;
        }
    }
    @media (max-width: 480px) {
        h2 {
            font-size: 1.2em;
        }
    }