.content_contanier {
    display: flex;
    justify-content: space-between;
}

.banner-img {
     margin-top: 195px;
    width: 100%;
}

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


/* 侧边栏 */

.content_nav {
    width: 300px;
    position: relative;
    top: -103px;
    z-index: 100;
}

.slider_nav_title1 {
    width: 280px;
    height: 98px;
    background: url('../img/list_nav.png') no-repeat;
    background-size: 100% 100%;
    font-size: 30px;
    text-align: center;
    color: #fff;
    line-height: 98px;
    white-space: nowrap;
    /* 禁止文字换行 */
    overflow: hidden;
    /* 隐藏溢出的内容 */
    text-overflow: ellipsis;
    /* 超出部分显示省略号(...) */
}

.slider_nav {
    width: 300px;
    position: relative;
    top: -103px;
    z-index: 100;
}

.slider_nav .list_nav_title1 {
    width: 280px;
    height: 98px;
    background: url('../img/list_nav.png') no-repeat;
    background-size: 100% 100%;
    font-size: 30px;
    text-align: center;
    color: #fff;
    line-height: 98px;
}

.nav-list {
    margin-top: 15px;
}

.slider_nav .nav-list .nav-item {
    width: 280px;
    min-height: 70px;
    background-color: #f5f5f5;
    border-bottom: 1px solid #e5e5e5;
    font-size: 20px;
    text-align: center;
    color: #404040;
    line-height: 70px;
    overflow: visible;
    height: auto;
}

.submenu li {
    width: 280px;
    height: 70px;
    background-color: #f5f5f5;
    border-bottom: 1px solid #e5e5e5;
    font-size: 20px;
    text-align: center;
    color: #404040;
    line-height: 70px;
}

.submenu {
    max-height: 0;
    overflow: hidden;
}

.has-submenu:hover .submenu {
    overflow: auto;
    /* min-height: 72px; */
    max-height: 500px;
}

.slider_nav .nav-list li:hover {
    transition: all 0.3s;
    color: #fff;
    background-color: #0068b7;
}



.nav-link {
    display: block;
    width: 100%;
    height: 100%;
}

.submenu li a {
    display: block;
    width: 100%;
    height: 100%;
}

.slider_nav .nav-list li:hover .nav-link::after {
    content: '';
    display: inline-block;
    width: 10px;
    height: 15px;
    background: url('../img/sjt.png') no-repeat;
    background-size: 100% 100%;
    margin-left: 10px;
}



/* 文章位置 */

.centent_list {
    width: 1100px;
}

.centent_list_nav {
    display: flex;
    height: 70px;
    color: #404040;
    align-items: center;
    border-bottom: 1px solid #e5e5e5;
}

.centent_postion {
    display: flex;
    align-items: center;
}

.centent_postion::before {
    content: '';
    display: block;
    position: relative;
    width: 17px;
    height: 24px;
    background: url('../img/teacher_postion.png') no-repeat;
    background-size: 100% 100%;
    margin-right: 10px;
}

.centent_postion {
    margin-right: 10px;
}

.centent_list_nav ul {
    display: flex;
}



.centent_list_nav ul li::after {
    content: '>';
    margin: 0 5px;
    display: inline-block;
}

.centent_list_nav ul li:hover {
    font-weight: 500;
}

.centent_list_nav ul li:last-child:after {
    content: '';
}


/* 文章内容部分 */



.centent_list_list {
   width: 100%;
    margin: 0 auto;
    padding: 30px;
    border-radius: 12px;
    background-color: #f2f5f9;
    color: #666;
    padding-bottom: 70px;
    margin-bottom: 20px;
    margin-top: 32px;
}

.centent_list_list h1 {
    text-align: center;
    margin-bottom: 16px;
    font-size: 32px;
    font-weight: 600;
    color: #000;
}


.essay_content p strong {
    font-size: 15px
}


.essay_content {
   margin-bottom: 16px;
    padding-top: 20px;
    border-top: 1px solid #eaecee;
    margin-top: 5px;
}

.essay_content p {
    /* margin: 10px 0;
    margin-top: 20px; */
    /* font-size: 16px; */
    line-height: 1.6;
}

.essay_content ol li {
    margin: 10px 0;
}

.Readings {
    width: 100%;
    display: flex;
    align-items: center;
    height: 40px;
    justify-content: center;
    padding-right: 50px;
}

.Readings li {
    margin-left: 20px;
    font-size: 16px;
}


.essay_footer {
    text-align: right;
    margin-top: 20px;
}

.essay_footer p {
    margin: 5px 0;
}


/* 时间列表 */
.centent_date_list {
    margin-top: 20px;
    padding-bottom: 40px;
}

.centent_date_list li {
    display: flex;
    width: 1100px;
    height: 90px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
    /* cursor: pointer; */
    margin-bottom: 20px;
}

.centent_date_list li a {
    width: 100%;
    height: 100%;
    display: flex;
}

.centent_date_list li:hover {
    transition: all 0.8s;
    transform: scale(1.001);
    box-shadow: 1px 5px 5px rgba(0, 0, 0, 0.3);
}

.centent_date_list li .date {
    width: 125px;
    height: 90px;
    box-sizing: border-box;
}

.centent_date_list li .date .date_top {
    height: 43px;
    line-height: 43px;
    background-color: #0065b4;
    font-size: 28px;
    color: #fff;
    text-align: center;
}

.centent_date_list li .date .date_bottom {
    height: 44px;
    line-height: 43px;
    background-color: #f5f5f5;
    text-align: center;
    font-size: 18px;
}

.date_content {
    padding: 10px;
    width: 1000px;
    box-sizing: border-box;
}

.date_content h1 {
    width: 1000px;
    font-size: 22px;
    font-weight: 300;
}

.date_content p {
    width: 100%;
    white-space: nowrap;
    /* 禁止文字换行 */
    overflow: hidden;
    /* 隐藏溢出的内容 */
    text-overflow: ellipsis;
    color: #777777;
    font-size: 16px;
    margin-top: 5px;
}