/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', 'Inter', sans-serif;
        background: linear-gradient(135deg, #0074D9, #6C5CE7);
        color: #FFFFFF;
        line-height: 1.6;
    }

    /* 容器 */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    /* 头部样式 */
    header {
        text-align: center;
        padding: 50px 0 20px 0;
    }

    header h1 {
        font-size: 2.5em;
        margin-bottom: 10px;
    }

    header p {
        font-size: 1.2em;
        color: #FF6F61;
    }

    /* 章节标题 */
    h2 {
        font-size: 2em;
        margin-top: 40px;
        margin-bottom: 20px;
        text-align: center;
    }

    h3 {
        font-size: 1.5em;
        margin-top: 30px;
        margin-bottom: 15px;
    }

    /* 段落样式 */
    p {
        font-size: 1em;
        margin-bottom: 15px;
        padding: 0 10px;
    }

    /* 代码块样式 */
    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin-bottom: 20px;
    }

    code {
        color: #FF6F61;
    }

    /* 图片样式 */
    img {
        width: 100%;
        max-width: 320px;
        height: auto;
        border-radius: 10px;
        margin: 10px;
    }

    /* 网格布局 */
    .grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        padding: 20px;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        padding: 20px;
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
        transition: transform 0.5s ease;
        perspective: 1000px;
    }

    .card:hover {
        transform: rotateY(10deg);
    }

    /* 按钮样式 */
    .button {
        display: inline-block;
        padding: 10px 20px;
        background: #6C5CE7;
        color: #FFFFFF;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        position: relative;
        overflow: hidden;
        transition: background 0.3s ease;
        text-decoration: none;
    }

    .button:hover {
        background: #FF6F61;
    }

    .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 ease, height 0.5s ease;
    }

    .button:active::after {
        width: 200%;
        height: 200%;
    }

    /* 列表样式 */
    ul {
        padding-left: 20px;
        margin-bottom: 20px;
    }

    ul li {
        margin-bottom: 10px;
    }

    /* 响应式设计 */
    @media (max-width: 480px) {
        header h1 {
            font-size: 1.8em;
        }
        h2 {
            font-size: 1.5em;
        }
        h3 {
            font-size: 1.2em;
        }
    }

    @media (min-width: 481px) and (max-width: 768px) {
        .container {
            padding: 15px;
        }
    }

    @media (min-width: 769px) and (max-width: 1024px) {
        .container {
            padding: 20px;
        }
    }

    @media (min-width: 1025px) and (max-width: 1440px) {
        .container {
            padding: 30px;
        }
    }

    @media (min-width: 1441px) {
        .container {
            padding: 40px;
        }
    }