.super-four-flex {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
}
.super-four-navwrap {
  padding: 20px 0 0;
  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: 52px;
  font-style: italic;
}
.super-four-nav-button a.cur em {
  font-size: 22px;
}
#training em,
#training.cur em {
  font-size: 20px;
  width: 126px;
  height: 34px;
  display: block;
}
.super-four-nav-button a span.eng {
  height: 10px;
  line-height: 7px;
  font-size: 10px;
  color: #080c34;
  font-weight: 900;
  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: 0px;
  right: 18px;
}

.super-four-nav-button a {
  background-size: 126px 60px;
}
#learning_nav span.eng {
  right: 24px;
}
#learning_nav {
  background: url(../images/topnav-jxdh.png) no-repeat 0 0;
  width: 310px;
  height: 60px;
  background-size: 310px 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);
}

#training {
  background: url(../images/topnav-zy.png) no-repeat 0 0;
  background-size: 126px 60px;
}
#training:hover,
#training.cur {
  background-image: url(../images/topnav-zy-cur.png?id=1);
}
#strength-test {
  background: url(../images/topnav-expert.png) no-repeat 0 0;
  background-size: 126px 60px;
}
#progress {
  background: url(../images/topnav-learningprogress.png) no-repeat 0 0;
  width: 103px;
  height: 60px;
  background-size: 103px 60px;
}
#volunteer {
  background: url(../images/topnav-ziliao.png) no-repeat 0 0;
  width: 103px;
  height: 60px;
  background-size: 103px 60px;
}
#experts {
  background: url(../images/topnav-zixun.png?date=00) no-repeat 0 0;
  width: 103px;
  height: 60px;
  background-size: 103px 60px;
}
#data_center {
  background: url(../images/topnav-zxzx.png) no-repeat 0 0;
  width: 103px;
  height: 60px;
  background-size: 103px 60px;
}

#strength-test:hover,
#strength-test.cur {
  background-image: url(../images/topnav-expert-cur.png);
}
#progress:hover,
#progress.cur {
  background-image: url(../images/topnav-learningprogress-cur.png);
}
#volunteer:hover,
#volunteer.cur {
  background-image: url(../images/topnav-ziliao-cur.png);
}
#experts:hover,
#experts.cur {
  background-image: url(../images/topnav-zixun-cur.png?date=00);
}
#data_center:hover,
#data_center.cur {
  background-image: url(../images/topnav-zxzx-cur.png);
}
.super-four-nav-button a .nav-tip {
  position: absolute;
  top: 70px;
  right: 15px;
  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: translateX(50%);
  margin-right: 20px;
  transition:
    opacity 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: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 8px;
  background: url(../images/position_icon.png) no-repeat 0 0;
  background-size: 16px 8px;
}
/* 悬停显示提示框 - 只在鼠标悬浮在"功能说明"上时显示 */
.super-four-nav-button a .eng:hover + .nav-tip,
.super-four-nav-button a .nav-tip:hover {
  opacity: 1;
  visibility: visible;
}
/* 全阶特训提示框对齐功能说明左边 */
#training .nav-tip {
  left: 51px;
  right: auto;
  transform: none;
  margin-right: 0;
}
#training .nav-tip::before {
  left: 30px;
  transform: none;
}
/* 全程测评提示框 */
#strength-test .nav-tip {
  left: 51px;
  right: auto;
  transform: none;
  margin-right: 0;
}
#strength-test .nav-tip::before {
  left: 30px;
  transform: none;
}
/* 学习任务中心提示框 */
#learning_center .nav-tip {
  left: 93px;
  right: auto;
  transform: none;
  margin-right: 0;
}
#learning_center .nav-tip::before {
  left: 30px;
  transform: none;
}
/* 学习超级导航提示框 */
#learning_nav .nav-tip {
  left: 235px;
  right: auto;
  transform: none;
  margin-right: 0;
}
#learning_nav .nav-tip::before {
  left: 30px;
  transform: none;
}
/* 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;
}
/* 导航提示框 */
#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;
}