1.
clearfix:before{
content:"";
display:table;
}
.clearfix:after{
content: "";
display: block;
clear: both;
}the effect of clearing float and upper margin overflow has been set, but it still can"t be executed. I don"t know why. It"s necessary or necessary to add a table, to solve the reason
<div id="main_details">
<!-- <table></table> -->
<div class="product_type clearfix">
<!--3.1+()-->
<div class="left_side">
<div class="product_pics">
<span class="product_id">:</span>
<img src="img/product/126951_.jpg"><!---->
</div>
<div class="product_calendar">
<div class="product_calendar_wrap">
<div class="tabs">
<div class="tab">201809</div>
</div>
<div class="header">
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>
<div></div>
</div>
</div>
</div>
<div class="right_side"></div>
</div>
<div class="product_detail">
</div>
</div>