.super-four-flex {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
}
.super-four-navwrap {
  padding: 20px 0 0;
  /*height: 46px;*/
  width: 100%;
}
.super-four-nav-button {
  background: url(../images/contop_bg.png) no-repeat top center #2d35a0;
  width: 100%;
  height: 86px;
}
.super-four-nav-button a {
  width: 126px;
  height: 60px;
  position: relative;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.super-four-nav-button a em {
  font-size: 20px;
  color: #fff;
  font-weight: 700;
  text-align: center;
  line-height: 50px;
  font-style: italic;
}
.super-four-nav-button a.cur em {
  font-size: 22px;
}
.super-four-nav-button a span.eng {
  font-style: italic;
  height: 10px;
  line-height: 7px;
  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;
  position: absolute;
  bottom: 1px;
  right: 15px;
}

.super-four-nav-button a {
  background-size: 126px 60px;
}
#learning_nav {
  background: url(../images/topnav-jxdh.png) no-repeat 0 0;
  width: 220px;
  height: 60px;
  background-size: 220px 60px;
}
#learning_nav:hover,
#learning_nav.cur {
  background-image: url(../images/topnav-jxdh-cur.png);
}

#learning_center {
  background: url(../images/topnav-center.png) no-repeat 0 0;
  width: 168px;
  height: 60px;
  background-size: 168px 60px;
}
#learning_center:hover,
#learning_center.cur {
  background-image: url(../images/topnav-center-cur.png);
}

.super-four-nav-button a:nth-child(3) {
  background: url(../images/topnav-zy.png) no-repeat 0 0;
  background-size: 126px 60px;
}
.super-four-nav-button a:nth-child(4) {
  background: url(../images/topnav-expert.png) no-repeat 0 0;
  background-size: 126px 60px;
}
.super-four-nav-button a:nth-child(5) {
  background: url(../images/topnav-learningprogress.png) no-repeat 0 0;
  background-size: 126px 60px;
}
.super-four-nav-button a:nth-child(6) {
  background: url(../images/topnav-ziliao.png) no-repeat 0 0;
  background-size: 126px 60px;
}
.super-four-nav-button a:nth-child(7) {
  background: url(../images/topnav-zixun.png?date=00) no-repeat 0 0;
  background-size: 126px 60px;
}
.super-four-nav-button a:nth-child(8) {
  background: url(../images/topnav-zxzx.png) no-repeat 0 0;
  background-size: 126px 60px;
}

.super-four-nav-button a:hover:nth-child(3),
.super-four-nav-button a.cur:nth-child(3) {
  background-image: url(../images/topnav-zy-cur.png?id=1);
}
.super-four-nav-button a:hover:nth-child(4),
.super-four-nav-button a.cur:nth-child(4) {
  background-image: url(../images/topnav-expert-cur.png);
}
.super-four-nav-button a:hover:nth-child(5),
.super-four-nav-button a.cur:nth-child(5) {
  background-image: url(../images/topnav-learningprogress-cur.png);
}
.super-four-nav-button a:hover:nth-child(6),
.super-four-nav-button a.cur:nth-child(6) {
  background-image: url(../images/topnav-ziliao-cur.png);
}
.super-four-nav-button a:hover:nth-child(7),
.super-four-nav-button a.cur:nth-child(7) {
  background-image: url(../images/topnav-zixun-cur.png?date=00);
}
.super-four-nav-button a:hover:nth-child(8),
.super-four-nav-button a.cur:nth-child(8) {
  background-image: url(../images/topnav-zxzx-cur.png);
}
.super-four-nav-button a .nav-tip {
  position: absolute;
  top: 60px;
  left: -10px;
  z-index: 10;
  width: 440px;
  padding: 12px;
  box-sizing: border-box;
  border-radius: 6px;
  background: #3275fb;
  border: 1px solid #47e6ff;
  color: #fff;
  font-size: 14px;
  font-style: normal;
  text-align: left;
  font-weight: 400;
  cursor: default;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
}
/* 提示框上方小箭头 */
.super-four-nav-button a .nav-tip::before {
  content: '';
  display: block;
  position: absolute;
  top: -8px;
  left: 28px;
  width: 16px;
  height: 8px;
  background: url(../images/position_icon.png) no-repeat 0 0;
  background-size: 16px 8px;
}
/* 提示框内容：标题行（带 i 图标） */
.super-four-nav-button a .nav-tip .tip-title {
  display: block;
  font-weight: 700;
}
.super-four-nav-button a .nav-tip .tip-title::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  background: url(../images/nav_icon_tip.png) no-repeat 0 0;
  background-size: 16px 16px;
}
/* 提示框内容：带 ▶ 前缀的条目 */
.super-four-nav-button a .nav-tip .tip-item {
  display: flex;
  align-items: flex-start;
  gap: 4px;
  position: relative;
  font-size: 14px;
  line-height: 20px;
}
.super-four-nav-button a .nav-tip .tip-item::before {
  content: '';
  display: block;
  width: 12px;
  height: 12px;
  background: url(../images/triangle_icon.png) no-repeat 0 0;
  background-size: 12px 12px;
  flex-shrink: 0;
  margin-top: 4px;
}
/* 各导航提示框宽度微调 */
#learning_nav .nav-tip {
  width: 480px;
}
#learning_nav .nav-tip .tip-title {
  font-size: 16px;
  line-height: 26px;
  padding-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}
#learning_nav .nav-tip .tip-item {
  padding-bottom: 6px;
}
#learning_nav .nav-tip .tip-item:last-child {
  padding-bottom: 0;
}

.super-four-nav-button img.tip-icon {
  width: 14px;
  height: 17px;
  position: absolute;
  top: 11px;
  left: 3px;
}