.banner-caption {
    width: 100%;
    position: absolute;
    left: 0;
    top: 0;
}

.banner-title {
    font-size: 24px;
    line-height: 1.8;
}

.banner-tip {
    line-height: 1.8;
    font-size: 16px;
}

.related-link {
    border-radius: 5px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    width: 220px;
    height: 50px;
}

.related-link:hover {
    border: 1px solid rgba(24, 144, 255, 0.5);
}

.related-link img {
    height: 48px;
    width: 218px;
}

.nav-wrapper {
    position: relative;
    border-bottom: 2px solid rgba(0, 0, 0, 0.05);
    height: 51px;
}

.nav {
    --bs-nav-link-color: #999;
    --bs-nav-link-hover-color: var(--main-color);
}

.nav-link {
    font-size: 22px;
    padding: 0 50px 0 0;
}

.nav-link div {
    height: 50px;
    border-bottom: 2px solid rgba(0, 0, 0, 0);
}

.nav-link.active div {
    border-bottom: 2px solid var(--main-color);
}

.span-icon {
    display: inline-block;
    margin-right: 11px;
    width: 22px;
    height: 22px;
    background-repeat: no-repeat;
    background-size: cover;
}

#home-tab .span-icon {
    background-image: url("/portal/static/img/icon_home_gray.png");
}

#home-tab.active .span-icon, #home-tab:hover .span-icon {
    background-image: url("/portal/static/img/icon_home.png");
}

#course-tab .span-icon {
    background-image: url("/portal/static/img/icon_course_gray.png");
}

#course-tab.active .span-icon, #course-tab:hover .span-icon {
    background-image: url("/portal/static/img/icon_course.png");
}

#science-tab .span-icon {
    background-image: url("/portal/static/img/icon_science_gray.png");
}

#science-tab.active .span-icon, #science-tab:hover .span-icon {
    background-image: url("/portal/static/img/icon_science.png");
}

#online-tab .span-icon {
    background-image: url("/portal/static/img/icon_31_gray.png");
}

#online-tab.active .span-icon, #online-tab:hover .span-icon {
    background-image: url("/portal/static/img/icon_31.png");
}

#train-tab .span-icon {
    background-image: url("/portal/static/img/icon_32_gray.png");
}

#train-tab.active .span-icon, #train-tab:hover .span-icon {
    background-image: url("/portal/static/img/icon_32.png");
}

#activity-tab .span-icon {
    background-image: url("/portal/static/img/icon_33_gray.png");
}

#activity-tab.active .span-icon, #activity-tab:hover .span-icon {
    background-image: url("/portal/static/img/icon_33.png");
}

.tab-content {
    margin-top: 30px;
}

.cards-more {
    position: absolute;
    right: 0;
    top: 18px;
}

.my-card {
    width: 380px;
    height: 250px;
    background-color: #FFF;
    box-shadow: 0 5px 25px 0 rgba(0, 0, 0, 0.07);
    border-radius: 5px;
    text-decoration: none;
}

.my-card img {
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
}

.my-card-title {
    font-size: 16px;
    color: #333;
    padding: 10px 10px 6px;
}

.my-card-tip {
    font-size: 12px;
    color: #999;
    padding: 0 10px;
}

.news-item3 {
    text-decoration: none;
    margin-top: 30px;
}

.news-item3-date {
    width: 64px;
}

.news-item3-date .day {
    color: #FFF;
    font-size: 12px;
    text-align: center;
    background-color: var(--main-color);
    width: 64px;
    height: 20px;
    line-height: 20px;
    display: inline-block;
}

.news-item3-date .bottom {
    width: 64px;
    height: 50px;
    border-left: 1px solid #CCCCCC;
    border-right: 1px solid #CCCCCC;
    border-bottom: 1px solid #CCCCCC;
    display: inline-block;
}

.news-item3-date .date {
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--main-color);
    margin-top: 8px;
}

.news-item3-date .month {
    text-align: center;
    font-size: 12px;
    color: #666;
}

.news-item3-text {
    margin-left: 12px;
}

.news-item3-text .title {
    font-size: 16px;
    color: #333;
    max-width: 510px;
}

.news-item3-text .abstract {
    font-size: 14px;
    color: #666;
    max-width: 510px;
    margin-top: 8px;
}

/* 轮播图控制按钮样式 */
.carousel-control-prev,
.carousel-control-next {
  width: 60px;
  height: 60px;
  background-color: rgba(255, 255, 255, 0.5); /* 半透明白色背景 */
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease; /* 添加过渡动画 */
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
  background-color: rgba(255, 255, 255, 0.8); /* 悬停时更明显的背景 */
  transform: translateY(-50%) scale(1.1); /* 悬停时放大1.1倍 */
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
  filter: invert(1) grayscale(100%) brightness(200%); /* 确保图标为白色 */
  width: 24px;
  height: 24px;
  background-size: 24px 24px; /* 增加图标大小 */
}

.carousel-control-prev {
  left: 40px; /* 向外移动 */
}

.carousel-control-next {
  right: 40px; /* 向外移动 */
}