/* 基础样式 */
    body {
        margin: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #8BC34A, #E8F5E9);
        color: #333;
    }
    
    h1, h2, h3, h4 {
        font-family: 'Poppins', sans-serif;
        color: #2E7D32;
    }
    
    h1 {
        font-size: 2.5rem;
        text-align: center;
        margin: 20px 0;
    }
    
    h2 {
        font-size: 2rem;
        margin-top: 40px;
        border-bottom: 2px solid #81C784;
        padding-bottom: 10px;
    }
    
    h3 {
        font-size: 1.5rem;
        margin-top: 30px;
    }
    
    h4 {
        font-size: 1.2rem;
        margin-top: 20px;
    }
    
    p {
        font-size: 1rem;
        line-height: 1.6;
        color: #555;
        margin: 15px 0;
    }
    
    ul {
        list-style-type: disc;
        margin-left: 20px;
    }
    
    pre {
        background: #f5f5f5;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }
    
    code {
        font-family: 'Courier New', Courier, monospace;
        color: #d32f2f;
    }
    
    /* 布局样式 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
        display: grid;
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    @media (min-width: 768px) {
        .container {
            grid-template-columns: 1fr 1fr;
        }
    }
    
    /* 卡片样式 */
    .card {
        background: #ffffff;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        padding: 20px;
        transition: transform 0.3s, box-shadow 0.3s;
    }
    
    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 15px rgba(0,0,0,0.2);
    }
    
    /* 按钮样式 */
    button {
        background-color: #4CAF50;
        color: white;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        cursor: pointer;
        transition: background-color 0.3s, box-shadow 0.3s;
    }
    
    button:hover {
        background-color: #45a049;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }
    
    /* 动画样式 */
    @keyframes leaf-fall {
        0% { transform: translateY(0) rotate(0deg); }
        100% { transform: translateY(100vh) rotate(360deg); }
    }
    
    .leaf {
        width: 30px;
        height: 30px;
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center;
        animation: leaf-fall 5s infinite;
    }
    
    /* 代码块样式 */
    .code-block {
        background: #272822;
        color: #f8f8f2;
        padding: 15px;
        border-radius: 5px;
        font-family: 'Courier New', Courier, monospace;
        overflow-x: auto;
    }
    
    /* 图片样式 */
    .images {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }
    
    .images img {
        width: 100%;
        max-width: 320px;
        border-radius: 10px;
    }
    
    /* 提示样式 */
    .notice {
        text-align: center;
        font-size: 1.2rem;
        color: #d32f2f;
        margin: 20px 0;
    }
    
    /* 预览代码样式 */
    .preview-code {
        background: #e0f7fa;
        padding: 10px;
        border-left: 5px solid #00796b;
        margin: 20px 0;
        border-radius: 3px;
        overflow-x: auto;
    }
    
    /* 响应式调整 */
    @media (max-width: 480px) {
        h1 {
            font-size: 2rem;
        }
        h2 {
            font-size: 1.5rem;
        }
    }
    
    @media (min-width: 1024px) {
        .container {
            padding: 40px;
        }
    }