body {
  background-color: #f4f5f7;
}
.w {
  margin:0 auto;
  width:1100px;
}
.clearfix:after {
  content: "";
  height: 0;
  line-height: 0;
  display: block;
  clear: both;
  visibility: hidden;
}
.clearfix {
  zoom: 1;
}
/* 当前所在页位置及标题 */
.crumbs .public {
  font-weight: 700;
  color:#333;
  font-size: 16px;

}

.crumbs a {
  text-decoration:none;
}
.crumbs a:hover {
  color:#3ca7b5;
}
.product_banner {
  text-align: center;
  margin-bottom:54px;
}
.product_banner>h1 {
  font-size: 24px;
  font-weight:700;
  margin-top: 20px;
  color:#333;
}
.product_banner p {
  height:40px;
  font-size: 18px;
  border-bottom:1px solid #dbdbdb;
  box-sizing: border-box;
  color:#676767;
  line-height: 40px;
}
/* 产品内容开始 */
.content {
  margin-bottom: 80px;
}
h2 {
  font-size: 20px;
  color:#333;
  font-weight: 700;
  margin-bottom:10px;
}
.content p {
  font-size: 16px;
  color:#333;
  text-indent: 2em;
  margin-bottom:30px;
  line-height: 35px;
}
ul,li {
  list-style: none;
}
.content li {
  list-style: circle;
  font-size: 18px;
  color:#3ca7b5;
  margin-bottom: 30px;
}
.content .public {
  background-color: white;
  width:300px;
  margin:0px 30px 50px;
  display: inline-block;
}
.content .function_top {
  width:300px;
  height:225px;
  position:relative;
}
.content .function_bot>h2 {
  font-weight:400;
  text-align: center;
  margin-bottom: 20px;
}
.content .public p {
  text-indent: inherit;
  margin:0px 20px;
  padding-bottom:20px;
}
.content .function_top:hover img {
  width: 400px;
  height:377px;
  z-index: 100;
  position:absolute;
  left:-50px;
}
.content .public>h2 {
  font-weight:400;
  margin:20px 20px;
}
.content .product  {
  width:450px;
  height: 350px;
  margin:0px 45px 50px;
  vertical-align: middle;
  position: relative;

}
.content .product img {
  width: 0px;
  height: 0px;
  position:absolute;
}
.content .product:hover img {
width: 100%;
height: 100%;
left:0px;
top:0px;
}