/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #001f3f, #6a0dad);
        color: #ffffff;
        overflow-x: hidden;
    }

    /* 导航栏样式 */
    .navbar {
        position: fixed;
        left: 0;
        top: 0;
        width: 200px;
        height: 100vh;
        background: rgba(0, 0, 0, 0.8);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: space-around;
        box-shadow: 2px 0 5px rgba(0,0,0,0.5);
    }

    .navbar a {
        color: #ffffff;
        text-decoration: none;
        font-size: 18px;
        padding: 10px 0;
        width: 100%;
        text-align: center;
        transition: background 0.3s;
    }

    .navbar a:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    /* 主内容区样式 */
    .content {
        margin-left: 220px;
        padding: 20px 40px;
        max-width: 1200px;
    }

    h1, h2, h3 {
        text-shadow: 2px 2px 5px rgba(0,0,0,0.5);
        letter-spacing: 1px;
    }

    h1 {
        font-size: 36px;
        margin-bottom: 20px;
    }

    h2 {
        font-size: 28px;
        margin-top: 40px;
        margin-bottom: 20px;
    }

    h3 {
        font-size: 22px;
        margin-top: 30px;
        margin-bottom: 15px;
    }

    p {
        line-height: 1.6;
        margin-bottom: 20px;
        font-size: 16px;
    }

    pre {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #39ff14;
    }

    /* 按钮样式 */
    .button {
        position: relative;
        background-color: #39ff14;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
        color: #000000;
        cursor: pointer;
        overflow: hidden;
        transition: transform 0.2s;
    }

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

    .button::before {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 100%;
        height: 100%;
        background: rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        opacity: 0;
        transition: opacity 0.3s;
    }

    .button:hover::before {
        opacity: 1;
        animation: ripple 1s ease-out;
    }

    @keyframes ripple {
        from {
            transform: scale(0);
            opacity: 1;
        }
        to {
            transform: scale(2);
            opacity: 0;
        }
    }

    /* 图标样式 */
    .icon {
        width: 50px;
        height: 50px;
        background: radial-gradient(circle, #ffffff, #d3d3d3);
        border-radius: 50%;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        margin-bottom: 10px;
    }

    /* 模块化卡片 */
    .card {
        background: rgba(255, 255, 255, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.5);
        border-radius: 10px;
        box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3), 0 4px 8px rgba(0, 0, 0, 0.2);
        padding: 20px;
        margin-bottom: 20px;
    }

    /* 背景动画 */
    .background {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('https://images.gptkong.com/demo/sample1.png') repeat;
        opacity: 0.1;
        z-index: -1;
        animation: moveBackground 60s linear infinite;
    }

    @keyframes moveBackground {
        from {background-position: 0 0;}
        to {background-position: 1000px 1000px;}
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .content {
            max-width: 1000px;
        }
    }

    @media (max-width: 1200px) {
        .content {
            padding: 20px;
        }
    }

    @media (max-width: 1024px) {
        .navbar {
            width: 150px;
        }

        .navbar a {
            font-size: 16px;
        }

        .content {
            margin-left: 170px;
        }
    }

    @media (max-width: 768px) {
        .navbar {
            position: relative;
            width: 100%;
            height: auto;
            flex-direction: row;
            padding: 10px 0;
        }

        .navbar a {
            flex: 1;
            font-size: 14px;
        }

        .content {
            margin-left: 0;
            padding: 20px;
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 28px;
        }

        h2 {
            font-size: 24px;
        }

        h3 {
            font-size: 20px;
        }

        p {
            font-size: 14px;
        }

        .button {
            padding: 8px 16px;
            font-size: 14px;
        }
    }

    @media (max-width: 320px) {
        h1 {
            font-size: 24px;
        }

        h2 {
            font-size: 20px;
        }

        h3 {
            font-size: 18px;
        }

        p {
            font-size: 12px;
        }

        .navbar a {
            font-size: 12px;
        }
    }