为什么我的页面无法滚动
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="11.css">
</head>
<body>
<div class="topbj">
<div class="top">
<p>Weilcome to cookes</p>
<p class="dhwz">VN/Vietnamese</p>
<p class="dhwz">login</p>
<p class="dhwz">redister</p>
<p class="dhwz">Favortes</p>
<p class="dhwz">dwcsdc</p>
</div>
</div>
<div class="topbj2">
</div>
<ul>
<li><a href="#">=All</a></li>
<li><a href="#">CAtegory</a></li>
<li><a href="#">Brand</a></li>
<li><a href="#">Made in China</a></li>
<li><a href="#">Camp schools</a></li>
</ul>
</div>
</div>
<!-- 11111111111111111111111111111111111111111 -->
<div class="ym_1">
<!--111111111111111111111111111111111111111111 -->
<div class="ym_1_left">
<div class="ym_1_leftwz"><p>文本区域</p></div>
</div>
<!--111111111111111111111111111111111111111111 -->
<div class="ym_1_center">
<div class="ym_1_center_top">广告位</div>
<div class="ym_1_center_down">
<div class="ym_1_center_down_left">广告位</div>
<div class="ym_1_center_down_center">广告位</div>
<div class="ym_1_center_down_right">广告位</div>
</div>
</div>
<!--111111111111111111111111111111111111111111 -->
<div class="ym_1_right">
<div class="ym_1_right_top"></div>
<div class="ym_1_right_down"></div>
</div>
<!-- 11111111111111111111111111111111111111111 -->
</div>
<div class="ym_2">
<div class="kk1">
<div class="kk1_up">推荐商品位</div>
<div class="kk1_down">推荐商品位</div>
</div>
<div class="kk2">
<div class="kk2_up">推荐商品位</div>
<div class="kk2_down">推荐商品位</div>
</div>
<div class="kk3">
<div class="kk3_up">推荐商品位</div>
<div class="kk3_down">推荐商品位</div>
</div>
<div class="kk4">
<div class="kk4_up">推荐商品位</div>
<div class="kk4_down">推荐商品位</div>
</div>
<div class="kk5">
<div class="kk5_up">推荐商品位</div>
<div class="kk5_down">推荐商品位</div>
</div>
</div>
<div class="ym_3">
<div class="kk6">
<div class="kk6_up">推荐商品位</div>
<div class="kk6_down">推荐商品位</div>
</div>
<div class="kk7">
<div class="kk7_up">推荐商品位</div>
<div class="kk7_down">推荐商品位</div>
</div>
<div class="kk8">
<div class="kk8_up">推荐商品位</div>
<div class="kk8_down">推荐商品位</div>
</div>
<div class="kk9">
<div class="kk9_up">推荐商品位</div>
<div class="kk9_down">推荐商品位</div>
</div>
<div class="kk10">
<div class="kk10_up">推荐商品位</div>
<div class="kk10_down">推荐商品位</div>
</div>
</div>
<div class="ym_3">
<div class="kk01">
<div class="kk01_up">商品位展示位</div>
<div class="kk01_down">商品位展示位</div>
</div>
<div class="kk02">
<div class="kk02_up">商品位展示位</div>
<div class="kk02_down">商品位展示位</div>
</div>
<div class="kk03">
<div class="kk03_up"></div>
<div class="kk03_down"></div>
</div>
<div class="kk.4">
<div class="kk04_up"></div>
<div class="kk04_down"></div>
</div>
<div class="kk05">
<div class="kk05_up"></div>
<div class="kk05_down"></div>
</div>
</div>
</body>
</html>
```css
*{
margin: 0 auto;
padding: 0;
list-style-type: none;
overflow: hidden;
/*display: flex;*/
margin: 0;
padding: 0;
}
.topbj{
width: 1800px;height: 24px;background-color: #ffffff;/*margin: 0 auto;*/
}
.top{
width:800px ;height: 24px;background-color: #ffffff;/*margin: 0 auto;*/
text-align:center;font-family: "微软雅黑";font-size: 15px;
}
.topbj2{
width: 1800px;height: 65px;background-color: #747070;/*margin: 0 auto;*/
}
.dhwz{
text-align: right;
font-weight: bold;
font-family: "微软雅黑";
margin-top: 40px;
margin-left: 20px;
color: #fff;
}
ul {
display: inline-block;
text-align: center;
}
ul li {
float: left;
display: inline-block;
line-height: 20px;
border-right:2px solid #bbb;
padding: 2px 5px;
margin: 5px 0;
}
ul li a {
display: block;
color: #666;
/* text-align: center;*/
padding: 0px 20px;
display: inline-block;
text-decoration: none;
}
li a:hover:not(.active) {
background-color: #f0f0f0;
padding:border-right: solid 5px red;
}
ul li a.active {
color: white;
background-color: #4CAF50;
}
.ym_1,.ym_2,.ym_3{
width: 1000px;height: 380px;background-color: #ffffff;margin: 0 230px;display: flex;
text-align: center;/*overflow: hidden;*/
}
.ym_1_left{
height: 380px;width: 170px;background-color:#6c6c6c;
text-align: center;float: left;
}
.ym_1_leftwz{
font-family: "微软雅黑";
margin-top: 124px;
}
.ym_1_center{width: 500px;height: 380px;background-color: #ffffff;}
.ym_1_center_top{width: 100%;height: 270px;background-color: #9d9d9d;}
.ym_1_center_down{width: 100%;height: 110px;background-color: #ffffff;display: flex;}
.ym_1_center_down_left{
width:33.3%; height: 110;float: left;background-color: #adadad;}
.ym_1_center_down_right{
width:33.3%; height: 110;float: left;background-color: #d0d0d0;}
.ym_1_center_down_center{
width:33.3%; height: 110;float: left;background-color: #e0e0e0;}
.kk1{height: 470px;width: 170px;background-color:#ffffff;
float:left;}
.kk1_up{height: 70%;width: 170px;background-color: #d0d0d0;}
.kk1_down{height: 30%;width: 170px;background-color: #7b7b7b;}
.kk2{height: 470px;width: 167px;background-color:#ffffff;
float:left;}
.kk2_up{height: 30%;width: 100%;background-color: #e0e0e0;}
.kk2_down{height: 70%;width: 100%;background-color: #d0d0d0;}
.kk3{height: 470px;width: 168px;background-color:#ffffff;
float:left;}
.kk3_up{height: 60%;width: 100%;background-color: #7b7b7b;}
.kk3_down{height: 40%;width: 100%;background-color: #d0d0d0;}
.kk4{height: 470px;width: 167px;background-color:#ffffff;
float:left;}
.kk4_up{height: 30%;width: 100%;background-color: #e0e0e0;}
.kk4_down{height: 70%;width: 100%;background-color: #d0d0d0;}
.kk5{height: 470px;width: 168px;background-color:#ffffff;
float:left;}
.kk5_up{height: 60%;width: 100%;background-color: #7b7b7b;}
.kk5_down{height: 40%;width: 100%;background-color: #d0d0d0;}
.kk6{height: 470px;width: 170px;background-color:#ffffff;
float:left;}
.kk6_up{height: 70%;width: 170px;background-color: #d0d0d0;}
.kk6_down{height: 30%;width: 170px;background-color:#7b7b7b;}
.kk7{height: 470px;width: 170px;background-color:#ffffff;
float:left;}
.kk7_up{height: 70%;width: 170px;background-color: #7b7b7b;}
.kk7_down{height: 30%;width: 170px;background-color: #d0d0d0;}
.kk8{height: 470px;width: 170px;background-color:#ffffff;
float:left;}
.kk8_up{height: 70%;width: 170px;background-color:#d0d0d0;}
.kk8_down{height: 30%;width: 170px;background-color: #7b7b7b;}
.kk9{height: 470px;width: 170px;background-color:#ffffff;
float:left;}
.kk9_up{height: 30%;width: 170px;background-color: #7b7b7b;}
.kk9_down{height: 70%;width: 170px;background-color: #d0d0d0;}
.kk10{height: 470px;width: 170px;background-color:#ffffff;
float:left;}
.kk10_up{height: 70%;width: 170px;background-color:#d0d0d0;}
.kk10_down{height: 30%;width: 170px;background-color:#7b7b7b;}
.kk01{height: 470px;width: 170px;background-color:#ffffff;
float:left;}
.kk01_up{height: 70%;width: 170px;background-color: red;}
.kk01_down{height: 30%;width: 170px;background-color: yellow;}
```