.onlinetest-title {
  background: #F7F8FA;
  padding: 30px 60px;
}
.onlinetest-title div:nth-child(1) {
  font-size: 36px;
  color: #333333;
  margin-bottom: 10px;
}
.onlinetest-title div:nth-child(2) {
  font-size: 18px;
  color: #333333;
  margin-bottom: 10px;
}
.onlinetest-content {
  padding: 50px 60px;
  background: #FFFFFF;
  display: flex;
  flex-wrap: wrap;
}
.onlinetest-content .onlinetest-cell:not(:nth-child(3n)) {
  margin-right: 20px;
}
.onlinetest-cell {
  margin-bottom: 20px;
}
.onlinetest-content .onlinetest-cell {
  cursor: pointer;
  width: calc((100% - 40px)/3);
  height: 100%;
}
.onlinetest-cell img {
  width: 100%;
}
.onlinetest-mask {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.6);
}
.onlinetest-mask .mask-content {
  border: 2px solid #C7B3AA;
  border-radius: 8px;
  width: 670px;
  height: 447px;
  position: relative;
}
.onlinetest-mask .mask-content img {
  width: 100%;
  border-radius: 8px;
}
.onlinetest-mask .mask-content .close {
  position: absolute;
  width: 30px;
  cursor: pointer;
  border-radius: 20px;
  height: 30px;
  right: -10px;
  top: -10px;
  background: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
}
.onlinetest-mask .mask-content .close img {
  width: 16px;
}
.onlinetest-introduce{
	margin-top:20px;
}
.onlinetest-cover{
	background-size: 100% 100%;
   	background-position: center center;
}
.onlinetest-cover,.onlinetest-cover>img,.onlinetest-cover .onlinetest-cover-mb{
	width: 1280px;
	height: 720px;
}
.onlinetest-cover{
	background-repeat: no-repeat;
	background-size: cover;
	background-position: center;
	text-align: center;
	position: relative;
}
.onlinetest-cover .onlinetest-cover-mb{
	background: rgba(0,0,0,0.47);
	position: absolute;
	left: 0;
	top: 0;
	overflow: hidden;
}
.onlinetest-cover .onlinetest-cover-mb img{
	width: 89px;
	height: 89px;
	position: absolute;
    top: calc(50% - 45px);
}
@media (min-width: 2560px) {
	.onlinetest-cover,.onlinetest-cover>img,.onlinetest-cover .onlinetest-cover-mb{
		width: 1920px;
		height: 1080px;
	}
}
.onlinetest-introduce{
	width: 100%;
}