/* 全局样式设置 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0074D9, #2E86C1);
        color: #333;
        line-height: 1.6;
        padding: 20px;
    }

    a {
        color: #FFA500;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #FF851B;
    }

    /* 容器布局 */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
        background: rgba(255, 255, 255, 0.9);
        border-radius: 10px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    }

    /* 标题样式 */
    h1, h2, h3 {
        font-weight: bold;
        margin-bottom: 15px;
        color: #0074D9;
    }

    h1 {
        font-size: 2.5em;
        text-align: center;
        margin-bottom: 30px;
    }

    h2 {
        font-size: 2em;
        margin-top: 30px;
    }

    h3 {
        font-size: 1.5em;
        margin-top: 20px;
    }

    /* 段落样式 */
    p {
        margin-bottom: 15px;
        font-size: 1em;
        color: #555;
    }

    /* 代码块样式 */
    pre {
        background: #f4f4f4;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #d63384;
    }

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

    .button:hover {
        transform: scale(1.05);
        background: #FFA500;
    }

    /* 卡片样式 */
    .card {
        background: #ffffff;
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 12px 24px rgba(0,0,0,0.2);
    }

    /* 网格布局 */
    .grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }

    /* 图片样式 */
    .image-gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 20px;
    }

    .image-gallery img {
        width: 100%;
        border-radius: 5px;
    }

    /* 动画效果 */
    @keyframes aurora-move {
        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: aurora-move 15s linear infinite;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .container {
            padding: 15px;
        }
        h1 {
            font-size: 2.2em;
        }
        h2 {
            font-size: 1.8em;
        }
    }

    @media (max-width: 1200px) {
        .grid {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        h1 {
            font-size: 2em;
        }
        h2 {
            font-size: 1.6em;
        }
    }

    @media (max-width: 768px) {
        .image-gallery {
            flex-direction: column;
        }
        h1 {
            font-size: 1.8em;
        }
    }

    @media (max-width: 480px) {
        .button {
            padding: 8px 16px;
            font-size: 0.9em;
        }
        h1 {
            font-size: 1.6em;
        }
        h2 {
            font-size: 1.4em;
        }
    }

    @media (max-width: 320px) {
        body {
            padding: 10px;
        }
        .container {
            padding: 10px;
        }
        h1 {
            font-size: 1.4em;
        }
        h2 {
            font-size: 1.2em;
        }
        p, code {
            font-size: 0.9em;
        }
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 20px;
    }

    th, td {
        padding: 12px;
        text-align: left;
        border-bottom: 1px solid #ddd;
    }

    th {
        background: #0074D9;
        color: #fff;
    }

    /* 提示框样式 */
    .alert {
        padding: 15px;
        border-radius: 5px;
        margin-bottom: 20px;
    }

    .alert-success {
        background: #4CAF50;
        color: #fff;
        animation: fadeIn 0.5s ease-in-out;
    }

    .alert-warning {
        background: #FFA500;
        color: #fff;
    }

    /* 关键视觉元素 */
    .icon {
        width: 50px;
        height: 50px;
        margin-right: 10px;
    }

    /* 数据可视化图表 */
    .chart {
        width: 100%;
        height: 300px;
        background: linear-gradient(to right, #0074D9, #2E86C1);
        border-radius: 10px;
        margin-bottom: 20px;
    }

    /* 表单样式 */
    .form-group {
        margin-bottom: 15px;
    }

    .form-group label {
        display: block;
        margin-bottom: 5px;
        font-weight: bold;
    }

    .form-group input, .form-group select {
        width: 100%;
        padding: 10px;
        border: 1px solid #ccc;
        border-radius: 5px;
    }