a {
  text-decoration: none !important;
}
/* 自定义导航栏样式 */
.navbar {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 搜索框在移动端全宽度 */
@media (max-width: 990px) {
  .navbar-collapse .search-form {
    width: 100%;
    margin-top: 10px;
  }
  .navbar-collapse .search-form .input-group {
    width: 100%;
  }
}

/* PC端搜索框适当宽度 */
@media (min-width: 992px) {
  .navbar-collapse .search-form {
    min-width: 300px;
  }
}

/* 导航项悬停效果 */
.navbar-nav .nav-link {
  position: relative;
  padding: 10px 15px;
}

.navbar-nav .nav-link:hover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 15px;
  right: 15px;
  height: 2px;
  background-color: #0d6efd;
}

.article {
  margin: 20px 0 0 0;
}
.article img {
  width: 80%;
  margin: 0 auto;
}