<input id="ipsearch" placeholder="请输入您敢兴趣的内容" type="text"/>
附上样式
ipsearch{
width: 100%;
height: 60px;
position: absolute;
left: 50%;
-webkit-transform: translateX(-50%);
border-radius: 40px;
font-size: 26px;
padding-left: 50px;
background-color: rgba(255,255,255,0.8);
}