.navigation-bar {
  height: 40px;
  background-color: #711c96;
  position: relative;
  width: 100%;
}

.ff-content {
  width: 100%;
  text-align: center;
  margin: 0 auto;
  height: 40px;
}

.ff-tab {
  margin: 10px 25px 0 25px;
  font-size: 18px;
  color: #ffffff;
  display: inline-block;
  position: relative;
  width: 86px;
}

.ff-tab a {
  text-decoration: none;
  color: #ffffff;
}

.ff-tab a:hover {
  color: #404040;
}

.ff-show {
  height: 40px;
  line-height: 40px;
}

.ff-show:hover {
  color: #3b80c6;
}
.ff-content table {
  display: flex;
  justify-content: center;
}