/* 基础样式 */
    body {
        margin: 0;
        font-family: 'Roboto', sans-serif;
        background-color: #E8F5E9;
        background-image: linear-gradient(to bottom, #E8F5E9, #A5D6A7);
        color: #212121;
        line-height: 1.6;
    }
    /* 导航栏 */
    .navbar {
        background-color: #1E88E5;
        padding: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .navbar .logo {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
        color: #FFFFFF;
        text-decoration: none;
    }
    .navbar ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
    }
    .navbar ul li {
        margin-left: 20px;
    }
    .navbar ul li a {
        color: #FFFFFF;
        text-decoration: none;
        font-family: 'Montserrat', sans-serif;
        transition: color 0.3s;
    }
    .navbar ul li a:hover {
        color: #FFC107;
    }
    /* 主体内容 */
    .container {
        padding: 40px 20px;
        max-width: 1200px;
        margin: 0 auto;
    }
    .notification {
        text-align: center;
        font-size: 18px;
        margin-bottom: 30px;
        color: #4CAF50;
    }
    article {
        background-color: #ffffff;
        padding: 30px;
        border-radius: 8px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
    article h2, article h3, article h4 {
        font-family: 'Poppins', sans-serif;
        color: #212121;
    }
    article h2 {
        font-size: 28px;
        margin-bottom: 20px;
    }
    article h3 {
        font-size: 22px;
        margin-top: 30px;
        margin-bottom: 15px;
    }
    article h4 {
        font-size: 20px;
        margin-top: 25px;
        margin-bottom: 10px;
    }
    article p {
        font-size: 16px;
        margin-bottom: 15px;
    }
    article pre {
        background-color: #f5f5f5;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Roboto', monospace;
        margin-bottom: 20px;
    }
    article code {
        background-color: #f5f5f5;
        padding: 2px 4px;
        border-radius: 3px;
        font-family: 'Roboto', monospace;
    }
    article ul, article ol {
        margin-bottom: 15px;
        padding-left: 20px;
    }
    article table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 20px;
    }
    article table, article th, article td {
        border: 1px solid #BDBDBD;
    }
    article th, article td {
        padding: 10px;
        text-align: left;
    }
    article th {
        background-color: #f0f0f0;
    }
    /* 图片样式 */
    .feature-image, .card img {
        width: 100%;
        height: auto;
        border-radius: 8px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
        margin-bottom: 20px;
    }
    /* 按钮样式 */
    .btn {
        display: inline-block;
        padding: 10px 20px;
        background-color: #FF9800;
        color: #FFFFFF;
        text-decoration: none;
        border-radius: 5px;
        transition: transform 0.3s ease-in-out;
    }
    .btn:hover {
        transform: scale(1.1);
    }
    /* 卡片布局 */
    .grid-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }
    .card {
        background-color: #ffffff;
        border: 1px solid #BDBDBD;
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    }
    .card h4 {
        margin-top: 0;
    }
    /* 动画效果 */
    .page-transition {
        animation: fadeIn 1s;
    }
    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }
    /* 响应式设计 */
    @media (max-width: 320px) {
        .navbar {
            flex-direction: column;
            align-items: flex-start;
        }
        .navbar ul {
            flex-direction: column;
            width: 100%;
        }
        .navbar ul li {
            margin-left: 0;
            margin-top: 10px;
        }
    }
    @media (max-width: 480px) {
        .container {
            padding: 20px 10px;
        }
        article {
            padding: 20px;
        }
    }
    @media (max-width: 768px) {
        .grid-container {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }
    @media (min-width: 1024px) and (max-width: 1200px) {
        .container {
            padding: 60px 40px;
        }
    }
    @media (min-width: 1440px) {
        .container {
            max-width: 1400px;
        }
    }