老师，我想请教一下当鼠标悬停在白色导航上照理说出现的下拉导航里的样式应该是一致的，但是为什么我换了其他图片之后它的布局就完全改变了（布局是统一设计的，只是换了不同的图片想去验证一下）；我也下载了源代码直接在源代码相应部分也试着换了其他图片，发现结果都是一样的，布局会紊乱。

<!--白色导航部分-->
    <div class="white-nav">
        <div class="wrap">
            <div class="logo">
                <img class="mi-home" src="images/mi-home.png" alt="">
                <img class="mi-logo" src="images/mi-logo.png" alt="">
            </div>
            <div class="nav-bar">
                <ul>
                    <li>
                        <a href="#">
                            <img src="images/f58837161090e2e04bf687088b2ffe77.gif" alt="">
                        </a>
                    </li>
                    <li>
                        <a href="#">小米手机</a>
                        <div class="nav-bar-list">
                            <div class="wrap">
                                <ul>
                                    <li>
                                        <a href="#">
                                            <div class="img-box">
                                                <img src="images/8729282b199b3ec51e31c1b6b15f3f93.jpg" alt="">
                                            </div>
                                            <p class="name1">小米10至尊纪念版</p>
                                            <p class="price1">5299元起</p>
                                        </a>
                                    </li>
                                    <li>
                                        <a href="#">
                                            <div class="img-box">
                                                <img src="images/b11742a0be47f9d97bb6a13ea580018d.png" alt="">
                                            </div>
                                            <p class="name1">小米11</p>
                                            <p class="price1">3999元起</p>
                                        </a>
                                    </li>
                                    <li>
                                        <a href="#">
                                            <div class="img-box">
                                                <img src="images/b11742a0be47f9d97bb6a13ea580018d.png" alt="">
                                            </div>
                                            <p class="name1">小米10至尊纪念版</p>
                                            <p class="price1">5299元起</p>
                                        </a>
                                    </li>
                                    <li>
                                        <a href="#">
                                            <div class="img-box">
                                                <img src="images/b11742a0be47f9d97bb6a13ea580018d.png" alt="">
                                            </div>
                                            <p class="name1">小米10至尊纪念版</p>
                                            <p class="price1">5299元起</p>
                                        </a>
                                    </li>
                                </ul>
                            </div>
                        </div>
                    </li>
                    <li>
                        <a href="#">Redmi 红米</a>
                    </li>
                    <li>
                        <a href="#">电视</a>
                    </li>
                    <li>
                        <a href="#">笔记本</a>
                    </li>
                    <li>
                        <a href="#">家电</a>
                    </li>
                    <li>
                        <a href="#">路由器</a>
                    </li>
                    <li>
                        <a href="#">智能硬件</a>
                    </li>
                    <li>
                        <a href="#">服务</a>
                    </li>
                    <li>
                        <a href="#">社区</a>
                    </li>
                </ul>
            </div>
            <div class="search"></div>
        </div>
    </div>

/*白色导航部分*/

.white-nav {
    width: 100%;
    height: 100px;
    position: relative;
}

.logo {
    width: 55px;
    height: 55px;
    background-color: #ff6700;
    float: left;
    margin-top: 22.5px;
    position: relative;
    overflow: hidden;
}

.logo>img {
    width: 100%;
    height: 100%;
    position: absolute;
    transition: all .2s;
}

.mi-home {
    left: -55px;
}

.mi-logo {
    left: 0;
}

.logo:hover>.mi-home {
    left: 0;
}

.logo:hover>.mi-logo {
    left: 55px;
}

.nav-bar {
    width: 875px;
    height: 100px;
    float: left;
    line-height: 100px;
}

.nav-bar>ul>li {
    float: left;
}

.nav-bar>ul>li>a {
    color: #333;
    padding: 0 10px;
}

.nav-bar>ul>li>a:hover {
    color: #ff6700;
}

.nav-bar>ul>li:first-child img {
    margin-top: 22.5px;
}

.nav-bar-list {
    width: 100%;
    height: 229px;
    background-color: #fff;
    border-top: 1px solid #eee;
    box-shadow: 0 3px 4px rgba(0, 0, 0, .1);
    position: absolute;
    top: 100px;
    left: 0;
    display: none;
    z-index: 999;
}

.nav-bar-list li {
    width: 204px;
    float: left;
}

.nav-bar-list li:last-child .img-box {
    border-right: 0;
}

.img-box {
    width: 100%;
    height: 110px;
    margin-top: 35px;
    border-right: 1px solid #eee;
    box-sizing: border-box;
    margin-bottom: 16px;
}

.nav-bar-list p {
    line-height: 20px;
    font-size: 12px;
}

.name1 {
    color: #333;
}

.price1 {
    color: #ff6700;
}

.nav-bar li:hover .nav-bar-list {
    display: block;
}

.search {
    width: 296px;
    height: 100px;
    background-color: pink;
    float: left;
}

这是我做的部分的截图：

这是源码我换了图片之后的截图