.banner2{ margin:0px auto;height: 720px;margin-top: 100px; background: #000; background-size: 100% auto; background-position: 50% 50% ; background-image: url('../img/face.jpg'); background-repeat: no-repeat;  }
.map-wrapper{width:100%; margin:0px auto; }
.map{ background-size: 100% auto; background-position: 50% 50% ; }



.address-wrapper{margin: 8% auto; width: 70%;}
.address-wrapper .add{float: left;width: 50%;font-size: 1.5em;line-height: 2em;}

.message-wrapper{margin: 0px auto; width: 70%;}
.message-wrapper .title{border-top: 2px solid #000; padding: 3%;text-align: center; font-size: 1em;line-height: 1.5em}
.message-wrapper .message{padding-bottom: 10%;width: 60%;margin: 0px auto;}


@media screen and (max-width: 900px) { /*当屏幕尺寸小于500px时，应用下面的CSS样式*/
.banner2{width:100%;height:150px; background-color:#3496d8; margin-top: 60px;}


.inner{margin: 0px;padding: 3%}

.address-wrapper{margin: 8% auto; width: 100%;}
.address-wrapper .add{float: initial;width: 100%;font-size: 1.25em;line-height: 1.5em;}

.message-wrapper{margin: 0px auto; width: 100%;}
.message-wrapper .message{padding-bottom: 10%;width: 100%;margin: 0px auto;}
}