.super-four-flex {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
}
.super-four-navwrap {
  padding: 32px 0;
  height: 46px;
  width: 100%;
}
.super-four-nav-button {
  background: url(../images/contop_bg.jpg) no-repeat top center #151f6c;
  width: 100%;
  height: 110px;
}
.super-four-nav-button a {
  width: 114px;
  height: 46px;
  position: relative;
  text-align: center;
  text-decoration: none;
}
.super-four-nav-button a em {
  display: block;
  width: 114px;
  height: 34px;
  font-size: 17px;
  color: #fff;
  font-weight: 700;
  text-align: center;
  line-height: 34px;
  font-style: italic;
}
.super-four-nav-button a span.eng {
  font-style: italic;
  width: 114px;
  padding: 0 5px 0 14px;
  box-sizing: border-box;
  height: 12px;
  line-height: 10px;
  font-size: 10px;
  color: #080c34;
  font-weight: 600;
  font-family: 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Hiragino Sans GB', 'Heiti SC', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
  display: block;
  letter-spacing: -0.05rem;
}

.super-four-nav-button a:nth-child(1) {
  background: url(../images/topnav1.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(2) {
  background: url(../images/topnav8.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(3) {
  background: url(../images/topnav9.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(4) {
  background: url(../images/topnav7.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(5) {
  background: url(../images/topnav-learningprogress.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(6) {
  background: url(../images/topnav2.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(7) {
  background: url(../images/topnav3.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(8) {
  background: url(../images/topnav4.png) no-repeat 0 0;
}
.super-four-nav-button a:nth-child(9) {
  background: url(../images/topnav5.png) no-repeat 0 0;
}

.super-four-nav-button a:hover:nth-child(1) {
  background: url(../images/topnav1_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(2) {
  background: url(../images/topnav8_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(3) {
  background: url(../images/topnav9_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(4) {
  background: url(../images/topnav7_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(5) {
  background: url(../images/topnav-learningprogress_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(6) {
  background: url(../images/topnav2_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(7) {
  background: url(../images/topnav3_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(8) {
  background: url(../images/topnav4_cur.png) no-repeat;
}
.super-four-nav-button a:hover:nth-child(9) {
  background: url(../images/topnav5_cur.png) no-repeat;
}

.super-four-nav-button a.cur:nth-child(1) {
  background: url(../images/topnav1_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(2) {
  background: url(../images/topnav8_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(3) {
  background: url(../images/topnav9_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(4) {
  background: url(../images/topnav7_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(5) {
  background: url(../images/topnav-learningprogress_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(6) {
  background: url(../images/topnav2_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(7) {
  background: url(../images/topnav3_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(8) {
  background: url(../images/topnav4_cur.png) no-repeat;
}
.super-four-nav-button a.cur:nth-child(9) {
  background: url(../images/topnav5_cur.png) no-repeat;
}
