/**  头部样式   **/
.main-top {
  background-image: url("http://dxcach1.wokelink.com/17/9/28/1066588_59cc6a344636a517e304bfcc_bc85389cb501.png");
  background-size: cover;
  height: 45.625rem;
  width: 100%;
  position: relative;
}
.top-title {
  padding-top: 11.1875rem;
  color:#ffffff;
}

.top-title .h1 {
  font-size:3.5rem;
  text-align:center;
}

.top-title .h3 {
  font-size:1.2rem;
  text-align:center;
}

.top-nav {
  width: 100%;
  position: absolute;
  bottom: 0;
  background: rgba(0, 0, 0, .1);
  color:#ffffff;
}

.top-nav ul {
  list-style: none;
  width: 60%;
  margin: 0 auto;
  height: 5rem;
  line-height: 5rem;
}

.top-nav ul li {
  width: 32%;
  opacity: 1;
  text-align: center;
  display: inline-block;
}

.top-nav ul li span {
  cursor: pointer;
  display: inline-block;
  width: 16rem;
  font-size: 1.5rem;
}

.top-nav ul .action span{
  background: rgba(62, 113, 237, .8);
}

/**  about-us部分   **/

.main-about-us {
  width: 100%;
  position: relative;
}

.about-us-title {
  margin-top: 6rem;
  text-align: center;
  font-size: 3.5rem;
}

.about-us-p {
  margin-top: 6rem;
  padding: 0 5rem;
  font-size:1.2rem;
  line-height: 1.5;
  color:#565656;
  letter-spacing:0;
  text-align:left;
}

/**   join-us部分   **/

.join-us-title {
  margin-top: 6rem;
  text-align: center;
  font-size: 3.5rem;
}

.join-us-body {
  font-size:2.7rem;
  margin-top: 6rem;
  color:#363a3c;
  letter-spacing:0;
  text-align:center;
}

.join-us-body .line {
  height: .1rem;
  width: 3rem;
  vertical-align: middle;
  margin: 0 2rem;
  display: inline-block;
  background-color: #999999;
  border-radius: .5rem;
}
.join-us-p {
  margin-top: 6rem;
  padding: 0 5rem;
}

.join-us-p p {
  font-size:1.2rem;
  line-height: 1.5;
  color:#7f7f7f;
  margin-top: 1.5rem;
  text-indent: 2em;
  letter-spacing:0;
  text-align:left;
}

.join-us-p p:first-child {
  text-indent: 0px;
}

.join-us-p ul {
  margin-left: 2rem;
}

.join-us-p ul li {
  font-size:1.2rem;
  line-height: 1.5;
  color:#7f7f7f;
  margin-top: 1.5rem;
  text-indent: 2em;
  letter-spacing:0;
  text-align:left;
}

/**   contact-us    **/
.main-contact-us {
  padding: 5rem;
}

.contact-us-body {
  background-size: cover;
  height: 33rem;
  margin: 0 auto;
  position: relative;
  background-image: url("http://dxcach1.wokelink.com/17/9/28/1066588_59cc6ac84636a517e304bfd2_7f0becb05f01.png");
}

.contact-us-card {
  position: absolute;
  width: 30rem;
  top: 30%;
  right: 5%;
  background-color: white;
}

.contact-us-card p {
  font-size: 1.3rem;
  padding-top: .5rem;
  line-height: 1.5;
  color: #3e3e3e;
}

@media screen and (max-width: 800px){
  html {
    font-size: 8px;
  }
}

@media screen and (min-width: 800px){
  html {
    font-size: 10px;
  }
}

@media screen and (min-width: 1000px){
  html {
    font-size: 12px;
  }
}

@media screen and (min-width: 1200px){
  html {
    font-size: 14px;
  }
}

@media screen and (min-width: 1400px){
  html {
    font-size: 16px;
  }
}

@media screen and (min-width: 1600px){
  html {
    font-size: 18px;
  }
}