.about{}
.about .about-01{height: 580px;background: #dedede url(../images/about_01.jpg) no-repeat center top;}
.about .about-02{height: 740px;background: #dedede url(../images/about_02.jpg) no-repeat center top;}
.about .about-03{height: 850px;background: #fff url(../images/about_03.jpg) no-repeat center top;}
.about .about-04{height: 470px;background: #dedede url(../images/about_04.jpg) no-repeat center top;}