/* 

header {
  background: linear-gradient(0deg, #f5f5f5, #e8ebed);
}

header .header {
  display: flex;
  justify-content: space-between;
  width: 1200px;
  margin: 0 auto;
  font-size: 14px;
  font-weight: 400;
  color: #525354;
  line-height: 18px;
  padding-top: 7px;
  padding-bottom: 7px;
}

header .header .title-wrap {
  color: #525354;
}

header .header .title-wrap+.title-wrap {
  white-space: nowrap;
  position: relative;
}

header .header .title-wrap+.title-wrap::before {
  content: "｜";
  margin-left: 11px;
  margin-right: 7px;
}

header .header .title-wrap .title {
  display: inline;
  color: inherit;
}

header .header .title-wrap .title:hover {
  color: #242424;
}

header .header .left {
  display: flex;
}

header .header .right {
  display: flex;
}

header .header .right .title-wrap:nth-child(1) .title::before {
  height: 16px;
  content: url("https://www.embedtrain.org/it/images/icon-date.png");
}

header .header .right .title-wrap:nth-child(2) .title::before {
  content: url("https://www.embedtrain.org/it/images/icon-say.png");
  height: 15px;
}

header .header .right .title-wrap .title {
  position: relative;
  padding-left: 22px;
}

header .header .right .title-wrap .title::before {
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
  left: 0;
} */

.nav {
  position: relative;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 1200px;
  height: 60px;
  margin: 0 auto;
  padding-right: 18px;
  box-sizing: border-box;
}

.nav * {
  box-sizing: border-box;
}

.nav .logo {
  width: 110px;
}

.nav .right {
  display: flex;
}

.nav .right .item:hover .nav-title,
.nav .right .item.active .nav-title {
  color: #ff3e2d;
}

.nav .right .item:hover::before,
.nav .right .item.active::before {
  content: "";
  width: 100%;
  height: 3px;
  position: absolute;
  left: 0;
  top: 35px;
  background-color: #d93b22;
}

.nav .right .item:hover.drop .nav-title::after {
  transform: rotate(180deg);
}

.nav .right .item:hover.drop .drop-wrap {
  height: 540px;
  border: 1px solid #d6d6d6;
  box-shadow: 0px 4px 8px 0px rgba(135, 135, 135, 0.24);
}

.nav .right .item {
  position: relative;
  height: 100%;
}

.nav .right .item.drop {
  position: relative;
  cursor: pointer;
}

.nav .right .item.drop .nav-title::after {
  position: relative;
  top: -3px;
  margin-left: 3px;
  content: "";
  display: inline-block;
  width: 9px;
  height: 5px;
  background-image: url("https://www.embedtrain.org/it/images/icon-arrow.png");
  transition: transform 0.3s;
}

.nav .right .item.drop .drop-wrap {
  /* width: 100vw; */
  transition: height 0.3s;
  height: 0;
  overflow: hidden;
  position: absolute;
  bottom: -16px;
  -webkit-transform: translateY(100%);
  -ms-transform: translateY(100%);
  transform: translateY(100%);
  background: #ffffff;
}

.nav .right .item.drop .drop-wrap .drop-parent {
  width: 106px;
  margin: 0 auto;
  /* height: 111px; */
  align-items: center;
  justify-content: space-between;
}

.nav .right .item.drop .drop-wrap .drop-parent .drop-item {
  text-align: center;
  padding-top: 10px;
  width: 99px;
  /* height: 81px; */
  transition: background-color 0.3s;
}



.nav .right .item.drop .drop-wrap .drop-parent .drop-item .course-title {
  color: #525354;
  font-size: 14px;
  font-weight: 400;
  color: #525354;
  line-height: 18px;
  padding-top: 12px;
  padding-bottom: 8px;
}

.nav .right .item.drop .drop-wrap .drop-parent .drop-item:hover .course-title {
  /* background-color: rgba(247, 247, 247, 0.53); */
  /* border-radius: 10px; */
  color: #d93b22;
}

.nav .right .item .nav-title {
  height: 100%;
  font-size: 16px;
  font-family: SourceHanSansCN;
  font-weight: bold;
  line-height: 26px;
  padding: 23px 15px 20px;
  display: inline;
  /* border-bottom: 3px solid transparent; */
  color: #424242;
}

/* .nav-dark .nav .right .item .nav-title {
  color: rgba(255, 255, 255, 0.7);
} */

.nav-fixed {
  position: fixed;
  width: 100%;
  background: #fff;
  top: 0;
  left: 0;
  z-index: 101;
  box-shadow: #999999 0 0 8px;
}

body {
  padding-top: 60px;
  overflow-x: hidden;
}