html,
body {
  width: 100%;
  margin: 0 auto;
  overflow-x: hidden;
}

div.banner {
  width: 100%;
  margin: 0 auto;
}

.banner video {
  margin: 0 auto;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  z-index: -999;
}

.banner video source {
  min-width: 100%;
  min-height: 100%;
  height: auto;
  width: auto;
}


.banner .inner {
  margin: 0 auto;
  color: #fff;
  box-sizing: border-box;
}

.banner .inner h3 {
  font-size: 28px;
  text-align: center;
  font-weight: 400;
  margin-top: 180px;
}

.banner .inner .txt {
  margin-top: 20px;
  text-align: center;
  font-size: 32px;
  margin-left: 6px;
}

.main {
  width: 1200px;
  margin: 0 auto;
}

.main li {
  width: 380px;
  height: 200px;
  float: left;
  border: 1px solid #e1e6eb;
  box-sizing: border-box;
  margin-top: 50px;
  border-radius: 5px;
  position: relative;
}

.main li.active::before{
  content: attr(data-content);
  display: block;
  position: absolute;
  width: 30px;
  height: 30px;
  background: #f85e06;
  border-radius: 50%;
  right: -11px;
  top: -11px;
  line-height: 30px;
  text-align: center;
  color: #fff;
  font-size: 12px;
}

.main li:nth-child(2) {
  margin: 0 30px;
  margin-top: 50px;
}

.main li>a {
  display: block;
}

.main li:nth-child(1) .pic {
  width: 45px;
  height: 45px;
  background: url("../images/yxl_index_01.png");
  margin-top: 40px;
}

.main li:nth-child(2) .pic {
  width: 45px;
  height: 45px;
  background: url("../images/yxl_index_02.png");
  margin-top: 40px;
}

.main li:nth-child(3) .pic {
  width: 45px;
  height: 45px;
  background: url("../images/yxl_index_03.png");
  margin-top: 40px;
}

.main li>a>h4,
.main li>a>p {
  text-align: center;
}

.main li>a>h4 {
  margin-top: 20px;
  font-weight: 700;
}

.main li>a>p {
  font-size: 12px;
  margin-top: 20px;
}

.m {
  border: 1px solid #2e79bd;
}