/* 引入字体 */
    @import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&family=Poppins:wght@500;700&display=swap');

    /* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        background: linear-gradient(135deg, #003366, #660099);
        color: #ffffff;
        font-family: 'Roboto', sans-serif;
        line-height: 1.6;
    }

    /* 标题样式 */
    h1, h2, h3, h4 {
        font-family: 'Poppins', sans-serif;
        color: #FFD700;
        margin-top: 1.5em;
        margin-bottom: 0.5em;
    }

    h1 {
        font-size: 2.5em;
        text-align: center;
    }

    h2 {
        font-size: 2em;
        border-bottom: 2px solid #FFD700;
        padding-bottom: 0.3em;
    }

    h3 {
        font-size: 1.75em;
        color: #FFCC00;
    }

    h4 {
        font-size: 1.5em;
        color: #FFA500;
    }

    /* 段落样式 */
    p {
        font-size: 1em;
        margin-bottom: 1em;
    }

    /* 代码块样式 */
    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        font-family: 'Roboto', monospace;
        margin-bottom: 1em;
    }

    code {
        color: #00FF7F;
        font-size: 0.95em;
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 1em;
    }

    th, td {
        border: 1px solid #FFD700;
        padding: 10px;
        text-align: left;
    }

    th {
        background: #660099;
        color: #FFD700;
    }

    td {
        background: #4B0082;
    }

    /* 链接样式 */
    a {
        color: #1E90FF;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

    /* 图片样式 */
    img {
        max-width: 100%;
        height: auto;
        border-radius: 10px;
        margin: 10px 0;
    }

    /* 卡片样式 */
    .card {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 15px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
        margin: 20px 0;
        transition: transform 0.3s ease;
    }

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

    /* 按钮样式 */
    .button {
        position: relative;
        display: inline-block;
        padding: 10px 20px;
        color: #ffffff;
        background-color: #FFCC00;
        border: none;
        border-radius: 25px;
        cursor: pointer;
        overflow: hidden;
        transition: background-color 0.3s ease;
    }

    .button:hover {
        background-color: #FFA500;
    }

    .button::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 0;
        height: 0;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 50%;
        transform: translate(-50%, -50%);
        opacity: 0;
        transition: width 0.5s ease, height 0.5s ease, opacity 0.5s ease;
    }

    .button:hover::after {
        width: 200%;
        height: 200%;
        opacity: 1;
    }

    /* 动画 */
    @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;
    }

    /* 表现文章为示例展示 */
    .sample-display {
        background: rgba(0, 0, 0, 0.5);
        padding: 20px;
        border-radius: 10px;
        margin: 30px 0;
    }

    .sample-display h2 {
        color: #FFD700;
    }

    /* 响应式设计 */
    @media (max-width: 320px) {
        body {
            font-size: 14px;
            padding: 10px;
        }

        h1 {
            font-size: 1.8em;
        }

        h2 {
            font-size: 1.5em;
        }

        h3 {
            font-size: 1.2em;
        }
    }

    @media (max-width: 480px) {
        body {
            font-size: 15px;
            padding: 15px;
        }

        .card {
            padding: 15px;
        }
    }

    @media (max-width: 768px) {
        body {
            font-size: 16px;
            padding: 20px;
        }

        .button {
            padding: 12px 25px;
        }
    }

    @media (max-width: 1024px) {
        body {
            font-size: 17px;
            padding: 25px;
        }

        h1 {
            font-size: 2em;
        }

        h2 {
            font-size: 1.8em;
        }
    }

    @media (max-width: 1200px) {
        body {
            font-size: 18px;
            padding: 30px;
        }

        h1 {
            font-size: 2.2em;
        }
    }

    @media (min-width: 1440px) {
        body {
            font-size: 20px;
            padding: 40px;
        }

        h1 {
            font-size: 3em;
        }
    }