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

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
        color: #ffffff;
        line-height: 1.6;
        padding: 20px;
    }

    h1, h2, h3, h4 {
        font-family: 'Inter', sans-serif;
        color: #ffeb3b;
        margin-bottom: 15px;
    }

    h1 {
        font-size: 2.5em;
        text-align: center;
        margin-top: 20px;
    }

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

    h3 {
        font-size: 1.75em;
        margin-top: 25px;
    }

    h4 {
        font-size: 1.5em;
        margin-top: 20px;
    }

    p {
        margin-bottom: 15px;
        font-size: 1em;
    }

    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #cddc39;
    }

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

    th, td {
        border: 1px solid #ffffff;
        padding: 10px;
        text-align: left;
    }

    th {
        background: rgba(255, 235, 59, 0.2);
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        transition: transform 0.3s ease-in-out;
        margin-bottom: 20px;
    }

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

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 250px;
        height: 100%;
        background: rgba(255, 255, 255, 0.2);
        backdrop-filter: blur(10px);
        padding: 20px;
        transition: opacity 0.3s ease;
    }

    .sidebar.hidden {
        opacity: 0;
    }

    .navbar {
        width: 100%;
        padding: 15px 20px;
        background: rgba(0, 0, 0, 0.5);
        position: fixed;
        top: 0;
        left: 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: background 0.3s ease;
    }

    .navbar a {
        color: #ffffff;
        text-decoration: none;
        margin-left: 15px;
        transition: color 0.3s ease;
    }

    .navbar a:hover {
        color: #ffeb3b;
    }

    #background-globe {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        animation: rotate 120s infinite linear;
        background-image: url('https://images.gptkong.com/demo/sample1.png');
        background-size: cover;
        background-position: center;
        opacity: 0.2;
    }

    @keyframes rotate {
        from { transform: rotateY(0deg); }
        to { transform: rotateY(360deg); }
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        body {
            padding: 15px;
        }
    }

    @media (max-width: 1200px) {
        .sidebar {
            width: 200px;
        }

        h1 {
            font-size: 2.2em;
        }

        h2 {
            font-size: 1.8em;
        }

        h3 {
            font-size: 1.6em;
        }

        h4 {
            font-size: 1.3em;
        }
    }

    @media (max-width: 1024px) {
        .sidebar {
            width: 180px;
        }

        .navbar a {
            margin-left: 10px;
        }
    }

    @media (max-width: 768px) {
        .sidebar {
            width: 150px;
            padding: 15px;
        }

        h1 {
            font-size: 2em;
        }

        h2 {
            font-size: 1.6em;
        }

        .card {
            padding: 15px;
        }
    }

    @media (max-width: 480px) {
        .sidebar {
            display: none;
        }

        h1 {
            font-size: 1.8em;
        }

        h2 {
            font-size: 1.4em;
        }

        .navbar {
            padding: 10px 15px;
        }
    }

    @media (max-width: 320px) {
        h1 {
            font-size: 1.5em;
        }

        h2 {
            font-size: 1.2em;
        }

        p {
            font-size: 0.9em;
        }

        pre {
            padding: 10px;
        }
    }

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

    .image-gallery img {
        width: 100px;
        height: 100px;
        object-fit: cover;
        border-radius: 8px;
    }

    /* 提示样式 */
    .reference-note {
        background: rgba(255, 235, 59, 0.2);
        padding: 10px;
        border-left: 5px solid #ffeb3b;
        margin-bottom: 20px;
        border-radius: 5px;
    }

    /* 动画效果 */
    .fade-in {
        animation: fadeIn 2s ease-in-out;
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }