nav {
  width: 100%;
  height: 88px;
  background: #ffffff;
  box-shadow: 0px 4px 2px 0px rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
nav .nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav .nav-container .right {
  height: 88px;
}
nav .nav-container .right ul {
  display: flex;
  height: 88px;
  justify-content: space-between;
}
nav .nav-container .right ul li {
  line-height: 88px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  cursor: pointer;
}
nav .nav-container .right ul li .down {
  position: relative;
  width: 120px;
  text-align: center;
  background-color: #fff;
  box-shadow: 0px 6px 24px 0px rgba(19, 19, 19, 0.17);
  visibility: hidden;
  opacity: 0;
}
nav .nav-container .right ul li .down img {
  position: absolute;
  left: 50%;
  top: -6px;
  margin-left: -6.5px;
}
nav .nav-container .right ul li .down .text {
  width: 120px;
}
nav .nav-container .right ul li .down .text ul {
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  height: 100%;
}
nav .nav-container .right ul li .down .text ul li {
  font-size: 14px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  line-height: 34px;
  transition: all 0.3s;
}
nav .nav-container .right ul li .down .text ul li:nth-child(1) {
  margin-top: 25px;
}
nav .nav-container .right ul li .down .text ul li:nth-last-child(1) {
  margin-bottom: 25px;
}
nav .nav-container .right ul li:hover {
  color: #ff8a22;
  transition: all 0.3s;
}
nav .nav-container .right ul li:hover a:hover {
  color: #ff8a22;
}
nav .nav-container .right ul li:hover .down {
  visibility: visible;
  opacity: 1;
  transition: all 0.3s;
}
nav .nav-container .right ul .width {
  text-align: center;
  width: 110px;
}
nav .nav-container .right ul .register {
  margin-left: 20px;
}
nav .nav-container .right ul .cyclopedia {
  margin-right: 20px;
}
nav .nav-container .right ul .register:hover .down {
  visibility: visible;
  opacity: 1;
  transition: all 0.3s;
  z-index: 999;
}
nav .nav-container .right ul .tally:hover .down {
  visibility: visible;
  opacity: 1;
  transition: all 0.3s;
  z-index: 999;
}