/* 基础样式 */
    body {
        margin: 0;
        font-family: 'Open Sans', sans-serif;
        background: radial-gradient(circle, rgb(25, 118, 210), transparent);
        color: #FFFFFF;
        line-height: 1.6;
        padding: 0;
    }

    /* 导航栏样式 */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 20%;
        height: 100%;
        background-color: rgba(33, 150, 243, 0.9);
        padding: 20px;
        box-sizing: border-box;
    }

    .sidebar nav ul {
        list-style: none;
        padding: 0;
    }

    .sidebar nav ul li {
        margin-bottom: 15px;
    }

    .sidebar nav ul li a {
        color: #FFFFFF;
        text-decoration: none;
        font-family: 'Roboto Condensed', sans-serif;
        font-size: 18px;
        transition: color 0.3s;
    }

    .sidebar nav ul li a:hover {
        color: #FFC107;
    }

    /* 主要内容区域 */
    .main-content {
        margin-left: 20%;
        padding: 40px;
        background: linear-gradient(135deg, rgba(255, 87, 34, 0.7), transparent);
        min-height: 100vh;
        box-sizing: border-box;
    }

    /* 头部英雄图 */
    .hero {
        position: relative;
        text-align: center;
        padding: 100px 20px;
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center;
        background-size: cover;
        color: #FFFFFF;
        animation: aurora-move 15s linear infinite;
    }

    .hero h1 {
        font-family: 'Roboto Condensed', sans-serif;
        font-size: 48px;
        margin-bottom: 20px;
    }

    .hero p {
        font-size: 24px;
    }

    /* 功能模块 */
    .features {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        margin-top: 40px;
    }

    .card {
        background-color: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s;
    }

    .card:hover {
        transform: scale(1.05);
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 8px;
    }

    .card h3 {
        font-family: 'Roboto Condensed', sans-serif;
        margin-top: 15px;
        font-size: 22px;
    }

    .card p {
        margin-top: 10px;
        font-size: 16px;
    }

    /* 代码示例 */
    pre {
        background-color: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin: 20px 0;
    }

    code {
        color: #00E676;
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
    }

    table, th, td {
        border: 1px solid rgba(255, 255, 255, 0.3);
    }

    th, td {
        padding: 12px;
        text-align: left;
    }

    th {
        background-color: rgba(33, 150, 243, 0.8);
        font-family: 'Roboto Condensed', sans-serif;
    }

    /* 按钮样式 */
    .cta-button {
        background-color: #FFC107;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        cursor: pointer;
        font-size: 16px;
        transition: background-color 0.3s;
    }

    .cta-button:hover {
        background-color: #FF9800;
    }

    /* 响应式布局 */
    @media (max-width: 1440px) {
        .sidebar {
            width: 25%;
        }

        .main-content {
            margin-left: 25%;
        }
    }

    @media (max-width: 1200px) {
        .sidebar {
            width: 30%;
        }

        .main-content {
            margin-left: 30%;
        }
    }

    @media (max-width: 1024px) {
        .sidebar {
            width: 35%;
        }

        .main-content {
            margin-left: 35%;
        }
    }

    @media (max-width: 768px) {
        .sidebar {
            width: 40%;
        }

        .main-content {
            margin-left: 40%;
        }
    }

    @media (max-width: 480px) {
        .sidebar {
            width: 50%;
        }

        .main-content {
            margin-left: 50%;
            padding: 20px;
        }

        .hero h1 {
            font-size: 32px;
        }

        .hero p {
            font-size: 18px;
        }
    }

    @media (max-width: 320px) {
        .sidebar {
            width: 60%;
        }

        .main-content {
            margin-left: 60%;
            padding: 10px;
        }

        .hero h1 {
            font-size: 24px;
        }

        .hero p {
            font-size: 14px;
        }
    }

    /* 动画效果 */
    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }