.doc_menu{
    margin-top: -60px;
    display: flex;
    flex-direction: row;
}
.doc_menu>li{
    flex: 1;
    position: relative;
    margin-right: 40px;
    width: 320px;
    height: 120px;
    background-color: #ffffff;
    box-shadow: 0 0 40px rgba(0,0,0,0.1);
    border-radius: 10px;
    padding: 34px 0 0 30px;
    cursor: pointer;
    transition: .25s;
}
.doc_menu>li:hover{
    margin-top: -4px;
}
.doc_menu>li:last-child{
    margin-right: 0;
}
.doc_menu>li>h3{
    font-size: 18px;
    margin-bottom: 18px;
}
.doc_menu>li>p{
    color: #808191;
    font-size: 16px;
}
.doc_menu>li>img{
    position: absolute;
    right: 20px;
    top: 28px;
}
.search_box{
    display: flex;
    flex-direction: row;
    line-height: 42px;
    height: 42px;
    border: 1px solid #e3e6ec;
    border-radius: 4px;
    margin: 20px 0;
}
.search_box>div:first-child{
    padding: 0 15px;
}
.search_box>div:nth-child(2){
    width: calc(100% - 42px);
}
.search_box>div:nth-child(2)>input{
    width: calc(100%);
    border: none;
    font-size: 14px;
    color: #808191;
}

.doc_list {
    display: flex;
    flex-wrap: wrap;
    gap: 40px; /* 子元素间距（水平/垂直） */
    box-sizing: border-box;
    padding: 0 0 40px; /* 底部补全垂直间距 */
    justify-content: space-between;
}
.doc_list li{
    cursor: pointer;
    width: calc(25% - 30px);
    flex: 1 0 calc(25% - 30px); /* 关键调整：使用弹性宽度 */
    max-width: calc(25% - 30px); /* 防止宽度溢出 */
    margin-bottom: 0; /* 移除外边距，改用 gap 控制 */
    padding: 15px; /* 可选：添加内边距 */
    box-sizing: border-box; /* 确保 padding 不影响计算 */
    box-shadow: 0 0 40px rgba(0,0,0,0.1);
    border-radius: 10px;
    transition: 0.25s;
}
.doc_list li:hover {
    margin-top: -4px;
}
.doc_list li:nth-child(4n){
    margin-right: 0;
}
.doc_list li>h3{
    font-size: 20px;
    padding-bottom: 20px;
    margin-bottom: 16px;
    border-bottom: 1px solid #e3e6ec;
}
.doc_list li>p{
    font-size: 14px;
    line-height: 30px;
}
.doc_list li>p>a{
    display: block;
    text-align: left;
    color: #808191;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.doc_list li>p>a:hover{color: #11142d}
.doc_nav{
    height: 60px;
    background: #f0f3f6;
    margin-bottom: 40px;
}
.doc_nav li{
    float: left;
    line-height: 60px;
    margin-right: 40px;
}
.doc_nav li>a{
    display: block;
    color: #808191;
}
.doc_nav li.active>a{
    color: #6c5dd3;
    border-bottom: 2px solid #6c5dd3;
}
.art_left{
    float: left;
    width: 200px;
    padding-top: 20px;
    border-right: 1px solid #e3e6ec;
}
.art_left>h1{
    font-size: 20px;
    margin-bottom: 30px;
}
.art_left>ul>li{
    font-size: 16px;
    margin-bottom: 20px;
    color: #11142d;
}
.art_left>ul>li>a{
    color: #11142d;
}
.art_left>ul>li>a:hover{color: #6c5dd3}
.art_left>ul>li>.art_left_slide{position: relative}
.art_left>ul>li>.art_left_slide>i{
    position: absolute;
    right: 20px;
    color: #808191;
    font-size: 16px;

}
.art_left>ul>li>.art_left_slide:hover{color: #6c5dd3;cursor: pointer}
.art_left>ul>li>.art_left_slide:hover i{color: #6c5dd3}
.art_left>ul>li>ul>li{
    margin-top: 20px;
    padding-left: 16px;
}
.art_left>ul>li>ul>li>a{
    color: #808191;
    font-size: 14px;
}
.art_left>ul>li>ul>li>a:hover{color: #6c5dd3}
.art_left li.active>a{color: #6c5dd3;font-weight: 500}
.art_mid{
    float: left;
    width: 1000px;
    padding: 0 40px;
}
.art_mid>h1{
    font-size: 30px;
    margin-bottom: 30px;
}
.art_mid>p{
    font-size: 16px;
    line-height: 30px;
    color: #808191;
}
.art_mid img{
    max-width: 100%;
}
.crumbs{
    margin-bottom: 40px;
    font-size: 14px;
    line-height: 14px;
    color: #808191;
}
.crumbs>a{
    color: #11142d;
    margin-right: 4px;
}
.crumbs>a:hover{color: #6c5dd3}
.art_right{
    position: relative;
    float: right;
    width: 200px;
    padding: 20px 0 20px 40px;
    border-left: 1px solid #e3e6ec;
}
.art_right:before{
    content: '';
    display: block;
    width: 9px;
    height: 9px;
    border: 1px solid #e3e6ec;
    background: #fff;
    border-radius: 5px;
    position: absolute;
    top: -4px;
    left: -5px;
}
.art_right:after{
    content: '';
    display: block;
    width: 9px;
    height: 9px;
    border: 1px solid #e3e6ec;
    background: #fff;
    border-radius: 5px;
    position: absolute;
    bottom: -4px;
    left: -5px;
}
.art_right>ul>li{
    position: relative;
    list-style: decimal;
    color: #11142d;
    font-size: 14px;
    margin-bottom: 15px;
}
.art_right>ul>li:before{
    content: '';
    display: block;
    height: 7px;
    width: 7px;
    background: #e3e6ec;
    border-radius: 4px;
    position: absolute;
    left: -44px;
    top: 3px;
}
.art_right>ul>li:hover:before{
    background: #6c5dd3;
}
.art_right>ul>li>a{
    color: #11142d;
}
.art_right>ul>li>a:hover{color: #6c5dd3}
.art_right>ul>li>ul>li{
    position: relative;
    margin-top: 15px;
}
.art_right>ul>li>ul>li>a{
    color: #808191;
}
.art_right>ul>li>ul>li>a:hover{color: #6c5dd3}
.art_right li.active{
    color: #6c5dd3;
}
.art_right li.active>a{
    color: #6c5dd3;
    font-weight: 500;
}
.art_right li.active:after{
    content: '';
    display: block;
    background: url("../img/point.png");
    height: 8px;
    width: 17px;
    position: absolute;
    left: -46px;
    top: 3px;
}
.art_right_fix{
    position: fixed;
    top: 40px;
    margin: 0 0 0 1200px;
}
.art_left_fix{
    position: fixed;
    top: 40px;
}
.art_mid_fix{
    margin: 0 0 0 200px;
}

.doc-content {
    margin-top: 10px;
}
.doc-content .doc-total {
    margin-bottom: 20px;
}
.doc-content .doc-item {
    display: flex;
    flex-direction: row;
    margin-bottom: 20px;
    padding: 20px;
    border-bottom: 1px solid #e3e6ec;
    border-radius: 10px;
    box-shadow: 0 0 40px rgba(0,0,0,0.1);
}
.doc-content .doc-item .doc-item-date {
    width: 100px;
    height: 100px;
    border-radius: 4px;
    border: 1px solid #e3e6eb;
    text-align: center;
}
.doc-content .doc-item .doc-item-date .date-ym {
    color: #ccc;
    font-size: 14px;
    line-height: 40px;
}
.doc-content .doc-item .doc-item-date .date-d {
    color: #808191;
    font-size: 36px;
    font-weight: 500;
    line-height: 36px;
}

.doc-content .doc-item .doc-item-right {
    width: calc(100% - 100px);
    padding-left: 30px;
}
.doc-content .doc-item .doc-item-right .doc-item-title:hover {
    color: #6c5dd3;
}
.doc-content .doc-item .doc-item-right .doc-item-title {
    text-decoration: none;
    text-align: left;
    display: block;
    font-size: 22px;
    line-height: 24px;
    font-weight: bold;
    color: #11142d;
    transition: .25s;
    margin-bottom: 10px;
}
.doc-content .doc-item .doc-item-right .doc-item-desc {
    text-align: left;
    color: #808191;
    transition: .25s;
    font-size: 14px;
    line-height: 24px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
}