.milestone {
  display: flex;
  width: 100%;
  justify-content: center;
  align-items: center;
}
.milestone ul {
  padding: 0;
  margin: 0;
  padding: 10px 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  flex-wrap: nowrap;
  overflow: auto;
}
.milestone ul li {
  padding: 0;
  margin: 0;
  list-style-type: none;
}
.milestone ul li {
  padding-top: 10px;
  width: 100%;
  position: relative;
  text-align: center;
  min-width: 115px;
}
.milestone ul li:last-child:after {
  display: none;
}
.milestone ul li:first-child:before {
  display: none;
}
.milestone ul li.active:before, .milestone ul li.active:after {
    border:1px solid #de0a11;
}
.milestone ul li.current:before {
  border:1px solid #de0a11;
}
.milestone ul li:before {
  content: '';
  position: absolute;
  top: 0;
  width: 50%;
  border: 1px solid #b7b7b7;
  left: 0;
}
.milestone ul li:after {
  content: '';
  position: absolute;
  top: 0;
  width: 50%;
  border: 1px solid #b7b7b7;
  right: 0;
}
.milestone li span {
  color: #b7b7b7;
  cursor: pointer;
}
.milestone li span:after {
  position: absolute;
  content: '';
  width: 8px;
  height: 8px;
  background: #b7b7b7;
  border-radius: 100%;
  top: -3px;
  left: 50%;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  z-index: 2;
}
.milestone li.current span, .milestone li.active span {
  color: #de0a11;
}
.milestone li.current span:after, .milestone li.active span:after {
  background: #de0a11;
}
.milestone li.current {
  font-size: 18px;
  font-weight: bold;
}
.milestone li.current span:after {
  -webkit-transform: scale(1.5);
          transform: scale(1.5);
  -webkit-transform-origin: 50% 50%;
          transform-origin: 50% 50%;
}

.content-milestone {
  margin: 37px 0;
  display: flex;
  justify-content: center;
  padding: 0 30px;
  text-align: center;
}
.content-milestone ul {
  padding: 0;
  margin: 0;
  width: 100%;
  max-width: 760px;
  overflow: hidden;
}
.content-milestone ul li {
  padding: 0;
  margin: 0;
  list-style-type: none;
}
.content-milestone ul li {
  display: none;
}
.content-milestone ul li.active {
  width: 100%;
  display: flex;
  justify-content: center;
  flex-direction: column;
}
.content-milestone .image {
  width: 100%;
  height: 50px;
}
.content-milestone .explain {
  padding: 20px 0;
}

.content {
  display: block;
  height: 150px;
  background: #000;
}