/* 关于我们 */
.about{ width:1020px; margin:30px auto;}
.about_img{ width:860px; height:240px; float:top;}
.about_txt{ width:860px; height:420px; float:center; font-size:18px; color:#333; line-height:40px; text-align:left; }
.about_txt h1{ font-size:20px; color:#0093dd;}

.contact-us { width:1020px; border:1px solid #ddd; margin:20px auto;}
.contact-us_txt{ width:900px; height:960 margin:20px; float:center;}