body{
  width: 100%;
  min-width: 960px;
  background-color: #fff;
  font-family: '微软雅黑',Arial,'Microsoft Yahei';
}
.page{
  width: 100%;
  position: relative;
  text-align: center;
}
.page1 img, .page3 img{
  width: 100%;
}
.page2 , .page4{
  padding: 50px 0;
}
.page2 h5{
  font-size: 24px;
  margin: 0;
  color: #1b272f;
}
.page2 > p{
  font-size: 22px;
  margin-top: 15px;
  color: #515151;
}
.page2 > a , .page4 > a {
  display: block;
  width: 225px;
  height: 35px;
  font-size: 16px;
  color: #3b3b3b;
  line-height: 35px;
  border: 1px solid #2a353d;
  margin: 35px auto 28px;
}
.page4 > a{
  margin: 63px auto;
  display: block;
  border: 1px solid #3091f2;
  width: 120px;
  line-height: 30px;
  border-radius: 2px;
  color: #3091f2;
}
.page4 p{
  font-size: 22px;
}
.page4-p1{
  font-weight: bold;
  color: #1b272f;
}
.page4-p2{
  color: #515151;
  margin-top: 16px;
}
.page4-p3{
  margin-bottom: 25px;
  margin-top: 37px;
  color: #1b272f;
}
.page4-p3 span{
  font-size: 24px;
  margin: 0 40px;
}
.webapp-case{
  height: 220px;
  margin-top: 62px;
}
.case-ul li{
  display: inline-block;
  width: 185px;
  height: 220px;
  position: relative;
  margin: 0 20px;
}
.case-content{
  width: 100%;
  height: 100%;
}
.case-content img{
  width: 185px;
  height: 185px;
}
.case-content p{
  line-height: 30px;
}
.case-mask{
  width: 100%;
  height: 185px;
  background-color: rgba(0,0,0,0.5);
  position: absolute;
  top: 0;
  left: 0;
  /*display: none;*/
  opacity: 0;
  -webkit-transition: opacity 1s;
  -moz-transition: opacity 1s;
  -ms-transition: opacity 1s;
  -o-transition: opacity 1s;
  transition: opacity 1s;
}
.case-ul li:hover .case-mask{
  /*display: block;*/
  opacity: 1;
}
.case-mask img{
    width: 65%;
    margin-top: 26px;
}
/*悬浮窗*/
.back-top{
  position: fixed;
  right: 34px;
  bottom: 20px;
  padding: 5px;
  width: 30px;
  height: 30px;
  background: #3091f2;
  border-radius: 3px;
  cursor: pointer;
}
.back-top svg{
  width: 100%;
  height: 100%;
}
.nav_top{
  width: 40px;
  height: 175px;
  position: fixed;
  bottom: 30px;
  right: 35px;
  z-index: 999999;
  font-size: 12px;
  font-weight: lighter;
  font-family: 'Microsoft Yahei';
}
.nav_top > span {
  position: relative;
  display: block;
  margin-bottom: 5px;
  height: 40px;
  background: #3091f2;
  box-shadow: 0px 0px 2px #3091f2;
}
.nav_top > span:hover {
  background: #44a0fc;
}
.nav_top .nav_help .help-tip,
.nav_top .nav_phone .phone-tip,
.nav_top .scrollTop .top-tip,
.nav_top .nav_senior .senior-tip{
  display: none;
  text-align: center;
  line-height: 17px;
  padding: 4px 5px;
  color: #fff;
}
.nav_top .nav_help:hover .help-tip,
.nav_top .nav_phone:hover .phone-tip,
.nav_top .nav_phone:hover .phone-num,
.nav_top .scrollTop:hover .top-tip,
.nav_top .nav_senior:hover .senior-tip{
  display: block;
}
.nav_top .nav_help:hover .use,
.nav_top .nav_phone:hover .use,
.nav_top .scrollTop:hover .use,
.nav_top .nav_senior:hover .use{
  display: none;
}
.nav_top > span a{
  display: block;
  width: 100%;
  height: 100%;
}
.nav_top .use{
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60%;
  height: 60%;
  -webkit-transform: translate3d(-50%, -50%, 0);
          transform: translate3d(-50%, -50%, 0);
}
.nav_top .scrollTop .use{
  width: 80%;
  height: 80%;
}
.nav_top > span svg{
  width: 100%;
  height: 100%;
}
.nav_top .nav_phone .phone-num{
  display: none;
  position: absolute;
  left: -134px;
  top: 5px;
  width: 120px;
  height: 30px;
  background: #3091f2; 
  color: white;
  line-height: 30px;
  text-align: center;
  box-shadow: 0px 0px 2px #3091f2;
}
.nav_top .nav_phone .phone-num:before{
  position: absolute;
  right: -14px;
  top: 9px;
  content: "";
  width: 0;
  height: 0;
  border: 7px solid transparent;
  border-left-color: #3091f2;
}