#header_box{position: absolute;left: 5%;top: 2%;width: 36px;height: 34px;background: rgba(0,0,0,0.5);border-radius: 50%;display: flex;align-items: center;justify-content: center;}
#header_box em{display: inline-block;width: 15px;height: 24px;background: url(../../imgs/mobiles/design_icon.png) no-repeat 0 -57px;}
#header_box a{display: flex;}
#contents_box img{width: 100%;}