* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

header {
    background-color: #0066cc;
    color: white;
    padding: 20px 0 20px 10%;
}

nav {
    padding: 15px 0 15px 10%;
    background-color: #f0f0f0;
}

nav a {
    text-decoration: none;
    color: #333;
    margin-right: 30px;
    font-size: 1.1em;
}

nav a:hover {
    color: #0066cc;
}

 /* 新增广告栏样式 */
        #ad-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
            background: #f5f5f5;
            margin: 20px 0;
        }

        #ad-wrapper {
            position: absolute;
            white-space: nowrap;
        }

        .ad-img {
            height: 200px;
            margin-right: 20px;
            display: inline-block;
            vertical-align: top;
            transition: transform 0.3s;
        }

        .ad-img:hover {
            transform: scale(1.05);
            cursor: pointer;
        }


        /* 页脚样式 */
        footer {
            background-color: #333;
            color: white;
            text-align: center;
            padding: 20px;
            position: relative;
            bottom: 0;
            width: 100%;
            margin-top: 50px;
        }

footer a {
            
            color: white;
            
        }


@media (max-width: 768px) {
    header, nav {
        padding-left: 5%;
    }
    
    nav {
        display: flex;
        flex-direction: column;
    }

    nav a {
        margin: 5px 0;
    }

    .ad-container {
        height: 200px;
    }

    .ad-slide img {
        height: 200px;
    }

    footer {
        flex-direction: column;
        text-align: center;
    }

    .footer-left,
    .footer-right {
        margin: 10px 0;
    }
}