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

    body {
        font-family: 'Roboto', sans-serif;
        line-height: 1.6;
        background: radial-gradient(circle at top right, #3D9970, #0074D9, #651FFF);
        color: #333;
        overflow-x: hidden;
    }

    /* 容器样式 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px 0;
    }

    /* 头部样式 */
    header {
        background: linear-gradient(135deg, #0074D9, #651FFF, #3D9970);
        padding: 60px 0;
        color: white;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    header h1 {
        font-size: 2.5rem;
        background: -webkit-linear-gradient(#ffffff, #e0e0e0);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        animation: fadeIn 2s ease-in-out;
    }

    header p {
        font-size: 1.2rem;
        margin-top: 20px;
        animation: fadeIn 3s ease-in-out;
    }

    /* 导航栏样式 */
    nav {
        display: flex;
        justify-content: center;
        gap: 30px;
        margin-top: 20px;
    }

    nav a {
        color: white;
        text-decoration: none;
        font-size: 1rem;
        position: relative;
        transition: color 0.3s ease;
    }

    nav a::after {
        content: '';
        display: block;
        width: 0;
        height: 2px;
        background: white;
        transition: width 0.3s;
        position: absolute;
        bottom: -5px;
        left: 0;
    }

    nav a:hover::after {
        width: 100%;
    }

    nav a:hover {
        color: #FFDC00;
    }

    /* 主体内容样式 */
    main {
        padding: 60px 0;
        background: rgba(255, 255, 255, 0.8);
    }

    /* 模块标题 */
    .module-title {
        text-align: center;
        margin-bottom: 40px;
        font-size: 2rem;
        color: #333;
        position: relative;
    }

    .module-title::after {
        content: '';
        width: 50px;
        height: 4px;
        background: linear-gradient(90deg, #0074D9, #651FFF);
        margin: 10px auto 0;
        display: block;
        border-radius: 2px;
    }

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

    .card {
        background: rgba(255, 255, 255, 0.9);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease, background 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .card:hover {
        transform: translateY(-10px);
        background: linear-gradient(135deg, #ffffff, #f0f0f0);
    }

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

    .card h3 {
        margin-bottom: 10px;
        font-size: 1.5rem;
        color: #0074D9;
    }

    .card p {
        font-size: 1rem;
        color: #666;
    }

    /* 示例展示样式 */
    .example {
        background: #f9f9f9;
        padding: 40px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        margin-top: 60px;
    }

    .example h2 {
        margin-bottom: 20px;
        font-size: 1.8rem;
        color: #333;
        text-align: center;
    }

    .example pre {
        background: #2d2d2d;
        color: #ccc;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-size: 0.9rem;
        font-family: 'Courier New', Courier, monospace;
    }

    .example table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }

    .example table, .example th, .example td {
        border: 1px solid #ddd;
    }

    .example th, .example td {
        padding: 10px;
        text-align: left;
    }

    .example th {
        background: #0074D9;
        color: white;
    }

    /* 按钮样式 */
    .btn {
        display: inline-block;
        background: #0074D9;
        color: white;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        text-decoration: none;
        transition: background 0.3s ease;
        cursor: pointer;
    }

    .btn:hover {
        background: #651FFF;
    }

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

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

    .animated-background {
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: auroraMove 15s linear infinite;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: -1;
    }

    /* 响应式设计 */
    @media (max-width: 320px) {
        header h1 {
            font-size: 1.5rem;
        }

        nav a {
            font-size: 0.9rem;
        }

        .module-title {
            font-size: 1.5rem;
        }

        .card h3 {
            font-size: 1.2rem;
        }

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

    @media (max-width: 480px) {
        header h1 {
            font-size: 2rem;
        }

        nav a {
            font-size: 1rem;
        }

        .module-title {
            font-size: 1.7rem;
        }

        .card h3 {
            font-size: 1.3rem;
        }

        .card p {
            font-size: 1rem;
        }
    }

    @media (max-width: 768px) {
        .grid {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }

        .module-title {
            font-size: 1.8rem;
        }
    }

    @media (max-width: 1024px) {
        .grid {
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        }

        header h1 {
            font-size: 2.2rem;
        }

        .module-title {
            font-size: 1.9rem;
        }
    }

    @media (min-width: 1200px) {
        .container {
            width: 80%;
        }

        header h1 {
            font-size: 3rem;
        }

        .module-title {
            font-size: 2.2rem;
        }

        .card h3 {
            font-size: 1.6rem;
        }

        .card p {
            font-size: 1.1rem;
        }
    }

    @media (min-width: 1440px) {
        header h1 {
            font-size: 3.5rem;
        }

        .module-title {
            font-size: 2.5rem;
        }

        .card h3 {
            font-size: 1.8rem;
        }

        .card p {
            font-size: 1.2rem;
        }
    }