/* 基本样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #001f3f, #6c7ae0);
        color: #ffffff;
        line-height: 1.6;
        overflow-x: hidden;
    }

    a {
        color: #6c7ae0;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #0056b3;
    }

    /* 容器 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 0;
    }

    /* 头部 */
    header {
        position: relative;
        width: 100%;
        height: 60vh;
        background: url('https://images.gptkong.com/demo/sample1.png') center center/cover no-repeat;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    header::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 31, 63, 0.7);
    }

    header h1 {
        position: relative;
        font-size: 3rem;
        z-index: 1;
        text-align: center;
        color: #ffffff;
        animation: fadeIn 2s ease-in-out;
    }

    /* 网格布局 */
    .grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        margin-top: 40px;
    }

    .grid-item {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .grid-item:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    }

    .grid-item img {
        width: 100%;
        height: auto;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    .grid-item h3 {
        margin-bottom: 10px;
        color: #6c7ae0;
    }

    /* 文章展示 */
    .article-section {
        background: rgba(255, 255, 255, 0.05);
        padding: 30px;
        border-radius: 10px;
        margin-top: 60px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    }

    .article-section h2,
    .article-section h3 {
        color: #ffffff;
        margin-bottom: 20px;
    }

    .article-section p {
        margin-bottom: 15px;
        color: #dddddd;
    }

    .article-section pre {
        background: #002b5c;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 15px;
    }

    .article-section code {
        color: #00ff99;
    }

    .article-section table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 20px;
    }

    .article-section th,
    .article-section td {
        border: 1px solid #6c7ae0;
        padding: 10px;
        text-align: left;
    }

    .article-section th {
        background: #0056b3;
    }

    /* 提示 */
    .tooltip {
        position: fixed;
        bottom: 20px;
        right: 20px;
        background: rgba(0, 31, 63, 0.8);
        padding: 10px 20px;
        border-radius: 20px;
        color: #ffffff;
        font-size: 0.9rem;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    /* 响应式 */
    @media (max-width: 768px) {
        header h1 {
            font-size: 2.5rem;
        }

        .container {
            padding: 20px 0;
        }
    }

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

        .article-section {
            padding: 20px;
        }
    }

    @media (min-width: 1440px) {
        .container {
            width: 80%;
        }

        header h1 {
            font-size: 4rem;
        }
    }

    /* 动画 */
    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* 代码块样式优化 */
    .code-block {
        background: #002b5c;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    .code-block code {
        color: #00ff99;
        font-family: 'Fira Code', monospace;
    }