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

    body {
        font-family: 'Lora', serif;
        background: linear-gradient(135deg, #4CAF50, #03A9F4);
        color: #333;
        line-height: 1.6;
        padding: 20px;
    }

    h1, h2, h3, h4 {
        font-family: 'Poppins', sans-serif;
        color: #ffffff;
        margin-bottom: 20px;
    }

    h1 {
        font-size: 2.5em;
        text-align: center;
        margin-top: 20px;
        text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    }

    h2 {
        font-size: 2em;
        border-bottom: 2px solid #ffffff;
        padding-bottom: 10px;
    }

    h3 {
        font-size: 1.5em;
        margin-top: 30px;
    }

    h4 {
        font-size: 1.2em;
        margin-top: 20px;
    }

    p {
        margin-bottom: 15px;
        padding: 0 10px;
    }

    a {
        color: #FFD700;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #FFA500;
    }

    /* 按钮样式 */
    .cta-button {
        display: inline-block;
        padding: 10px 20px;
        background: linear-gradient(135deg, #4CAF50, #03A9F4);
        color: #ffffff;
        border: none;
        border-radius: 25px;
        cursor: pointer;
        transition: background 0.3s ease;
        text-align: center;
        margin: 20px 0;
    }

    .cta-button:hover {
        background: linear-gradient(135deg, #03A9F4, #4CAF50);
    }

    /* 网格布局 */
    .grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        padding: 20px;
    }

    .grid-item {
        background-color: rgba(245, 245, 245, 0.8);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transition: transform 0.3s ease;
    }

    .grid-item:hover {
        transform: translateY(-10px);
    }

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

    table, th, td {
        border: 1px solid #ddd;
    }

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

    th {
        background-color: #4CAF50;
        color: white;
    }

    tr:nth-child(even) {
        background-color: #f2f2f2;
    }

    /* 代码块样式 */
    pre {
        background: #2d2d2d;
        color: #ccc;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin: 20px 0;
    }

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

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

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

    .animated-background {
        background: radial-gradient(circle, rgba(255, 87, 34, 0.8), transparent);
        animation: aurora-move 15s linear infinite;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        h1 {
            font-size: 2.2em;
        }
    }

    @media (max-width: 1200px) {
        .grid-container {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        h1 {
            font-size: 2em;
        }
    }

    @media (max-width: 768px) {
        .grid-container {
            grid-template-columns: 1fr;
        }

        .cta-button {
            width: 100%;
        }
    }

    @media (max-width: 480px) {
        h1 {
            font-size: 1.8em;
        }

        h2 {
            font-size: 1.6em;
        }

        h3 {
            font-size: 1.3em;
        }
    }

    @media (max-width: 320px) {
        body {
            padding: 10px;
        }

        h1 {
            font-size: 1.5em;
        }

        h2 {
            font-size: 1.4em;
        }

        h3 {
            font-size: 1.1em;
        }
    }

    /* 粒子背景 */
    .particle-background {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: transparent;
        pointer-events: none;
        z-index: -1;
    }

    /* 样式参考提示 */
    .reference-note {
        text-align: center;
        font-size: 1em;
        color: #ffffff;
        margin: 20px 0;
        animation: fadeIn 2s ease-in-out;
    }

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