.navigation {
  height: 65px;
  width: 989px;
  position: absolute;
  bottom: 40px;
  left: calc(50% - 494px);
}

.navigation-bg {
  background: url("@/assets/img/navigation/navigationbg.png");
  background-size: 100% 100%;
  width: 989px;
  height: 28px;
  position: absolute;
  bottom: 0px;
  left: 0px;
}

.navigation-content {
  /* 使用 flex 布局 */
  display: flex;
  /* 使子元素水平等间隔分布 */
  justify-content: space-between;
  position: absolute;
  top: 0px;
  left: calc(50% - 350px);
  float: left;
  width: 700px;
  margin: auto;
  z-index: 1;
}
.navigation-contents {
  /* 使用 flex 布局 */
  display: flex;
  /* 使子元素水平等间隔分布 */
  justify-content: center;
  position: absolute;
  top: 0px;
  left: calc(50% - 350px);
  float: left;
  width: 700px;
  margin: auto;
  z-index: 1;
}

.navigation-item {
  float: left;

  color: #cdf3fd;
  cursor: pointer;
  width: 149px;
  height: 51px;

  line-height: 46px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  text-indent: 40px;
}

.bg1 {
  background: url("@/assets/img/navigation/buttonbg1.png");
}

.bg2 {
  background: url("@/assets/img/navigation/buttonbg2.png");
}

.bg3 {
  background: url("@/assets/img/navigation/buttonbg3.png");
}

.bg4 {
  background: url("@/assets/img/navigation/buttonbg4.png");
}

.bg1:hover {
  background: url("@/assets/img/navigation/buttonbgac1.png");
}
.bg1-active {
  background: url("@/assets/img/navigation/buttonbgac1.png");
}
.bg2:hover {
  background: url("@/assets/img/navigation/buttonbgac2.png");
}
.bg2-active {
  background: url("@/assets/img/navigation/buttonbgac2.png");
}
.bg3:hover {
  background: url("@/assets/img/navigation/buttonbgac3.png");
}
.bg3-active {
  background: url("@/assets/img/navigation/buttonbgac3.png");
}

.bg4:hover {
  background: url("@/assets/img/navigation/buttonbgac4.png");
}
.bg4-active {
  background: url("@/assets/img/navigation/buttonbgac4.png");
}