body{
  background: #F5F5F5;
}
.wrap .header {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  padding: 0 1.6rem 0 0.6rem;
  z-index: 20;
}
.top {
  position: relative;
  width: 100%;
  padding-top: 30%;
  padding-left: 16%;
  background-image: url('../img/permeate-service/bg.png');
  background-repeat: no-repeat;
  background-size: cover;
	-moz-background-size: cover;
	-webkit-background-size: cover;
	-o-background-size: cover;
	box-sizing: border-box;
}
.top .con {
  position: absolute;
  bottom: 0.86rem;
  max-width: 12.08rem;
}
.top .con .title {
  padding: 0.18rem;
  color: #fff;
  font-size: 0.6rem;
  font-weight: bold;
  text-align: center;
  line-height: 1.06rem;
  background: #E83828;
  letter-spacing:0.01rem;
}
.top .con .tip {
  margin-top: 0.18rem;
  padding-left: 0.2rem;
  color: #fff;
  font-size: 0.4rem;
  letter-spacing:0.01rem;
}
.top .download {
  position: absolute;
  bottom: -0.5rem;
  width: 2.28rem;
  height: 0.92rem;
  padding: 0 0.32rem;
  box-sizing: border-box;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-justify-content: space-between;
	-ms-flex-pack: space-between;
  justify-content: space-between;
  -webkit-align-items: center;
	-ms-flex-align: center;
  align-items: center;
  background: #fff;
  box-shadow: 1px 4px 18px rgba(0,0,0,0.2);
  cursor: pointer;
}
.top .download img {
  width: 0.3rem;
  height: 0.28rem;
}
.top .download p {
  color: #E83828;
  font-size: 0.28rem;
}
.why { 
  width: 100%;
  margin-top: 1.7rem;
  padding: 0 16%;
  box-sizing: border-box;
}
.why .title {
  display: inline-block;
  padding: 0.12rem;
  box-sizing: border-box;
  background: #E83828;
  color: #fff;
  font-size: 0.26rem;
  letter-spacing:0.01rem;
}
.why .sb-title {
  margin-top: 0.14rem;
  margin-bottom: 0.2rem;
  color: #000;
  font-size: 0.44rem;
  font-weight: bold;
  letter-spacing:0.01rem;
}
.why p {
  margin-top: 0.18rem;
  color: #4A4A4A;
  font-size: 0.14rem;
}
.why p span {
  display: inline-block;
  margin-right: 0.3rem;
  color: #4A4A4A;
  font-size: 0.22rem;
}
.why .block{
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}
.why .block li {
  width: 3.68rem;
  height: 2.1rem;
  margin-right: 0.1rem;
  padding-left: 0.3rem;
  padding-top: 0.3rem;
  background: #fff;
  box-sizing: border-box;
}
.why .block li .bo {
  margin-bottom: 0.04rem;
  margin-top: 0rem;
  color: #000;
  font-size: 0.22rem;
  font-weight: bold;
}
.why .block li .con {
  margin-top: 0.08rem;
  color: #4A4A4A;
  font-size: 0.14rem;
  line-height: 0.22rem;
}