@media (min-width: 1520px) {
  .container {
    max-width: 1520px !important;
    margin: 0 auto;
  }
}



.banner {
  width: 100%;
}
.banner img{
  width: 100%;
}


.cover {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 15, 38, 0.3);
  display: flex;
  justify-content: center;
  align-items: center;
}

.banner span {
  font-size: 100px;
  color: #ffffff;
}


.content {
  background-color: #ffffff;
  color: #333333;
  font-size: 1.6rem;
}

.nav_line {
  padding: 20px 0 20px 0;
}

.nav_line a:hover,
.nav_line a:active {
  color: #3287FF;
}

.nav_item {
  padding: 5px 10px;
}

.article_container {
  padding-bottom: 80px;
}

.article_title {
  text-align: center;
  font-size: 32px;
  color: #000000;
  font-weight: 500;
}

.article_date {
  text-align: center;
  color: #999999;
  font-size: 1.4rem;
  padding: 20px 0;
}

.article_pic {
  display: flex;
  justify-content: center;
  align-items: center;
}

.article_pic img {
  width: 100%;
  margin: 30px 0;
}

.article_desc {
  text-indent: 2em;
  line-height: 2;
}


/* .join_content {
  background-color: #e4e4e4;
  padding: 10rem 0;
}

.join_box {
  background-color: #fff;
}

.left_row {
  border-right: 1px solid #F7F7F7;
  padding: 4rem 0;
}

.join_content_code {
  width: 180px;
  height: 180px;
}

.right_row {
  padding: 4rem 0;
}

.title {
  font-size: 2rem;
  color: #333333;
  font-weight: 500;
}

.title1 {
  margin-top: 2rem;
}

.title2 {
  padding: 2rem 0;
}

.title3 {
  font-size: 1.25rem;
}

.right_row a {
  display: block;
  margin-top: 5rem;
}

.join_button {
  background-color: #3287FF;
  color: #ffffff;
  font-size: 1.5rem;
  padding: 1rem 4rem;
  border-radius: 4px;
} */