@charset "utf-8";
/* CSS Document */
body {
    padding: 0;
    margin: 0;
    background: #ffffff;
    color: #333;
    font-family: "Segoe UI", "pen Sans", "Helvetica Neue", "MWF-MDL2", "Helvetica,Arial,sans-serif";
}
a {
    display: block;
    text-decoration: none;
    color: #333333;
}
ul, li, p, h1, h2, h3, h4, h5, h6 {
    margin: 0;
    padding: 0;
}
li {
    list-style: none;
}
/*navigation */
.nav_box {
    display: block;
    margin: 0;
    width: 100%;
    overflow: inherit;
    position: relative;
    background: #ffffff;
    z-index: 100;
    border-bottom: 1px solid #cccccc;
}
.container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1440px;
    overflow: inherit;
    margin: 0 auto;
}
.logo {
    float: left;
    font-size: 0;
    aspect-ratio: 4/1;
}
.nav {
    float: right;
    list-style: none;
}
.nav_button {
    display: none;
    float: right;
    height: 25px;
    width: 25px;
    outline: none;
    margin-top: 30px;
    margin-bottom: 30px;
    margin-right: 6%;
    background: #ffffff;
    border: none;
    background-size: 25px 25px;
    background-repeat: no-repeat;
    background-image: url("../img/common/mobile_nav.webp");
}
.nav li {
    position: relative;
    float: left;
}
.active {
    color: #0078ff;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    border-bottom: 3px solid #0078ff;
}
.nav li a {
    padding: 0 20px;
    font-size: 18px;
    height: 60px;
    line-height: 60px;
}
.nav li a:hover {
    color: #0078ff;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    border-bottom: 3px solid #0078ff;
}
#shade {
    width: 100%;
    height: 100%;
    background-color: #000;
    filter: alpha(opacity=50);
    -moz-opacity: 0.5;
    opacity: 0.5;
    position: absolute;
    left: 0px;
    top: 0px;
    z-index: 1;
    display: none;
}
.last-search {
    padding: 17px;
}
#btnSearch {
    height: 22px;
    width: 22px;
    border: none;
    cursor: pointer;
    background: url("../img/common/search-icon.png") center 100% no-repeat;
}
#search-box {
    position: absolute;
    z-index: 99;
    right: 0;
    top: 62px;
    width: 320px;
    padding: 12px;
    /*border-radius: 8px;*/
    background-color: #ffffff;
    box-shadow: 1px 1px 10px rgb(0 0 0 / 20%);
}
.search-hidden {
    display: none;
}
#search-box div {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}
.search-div input {
    padding: 10px;
    outline: none;
    font-size: 14px;
    width: calc(100% - 38px);
    box-sizing: border-box;
    background: #f1f1f1;
    border: 1px solid #f1f1f1;/*border-right: none;*//*border-radius: 4px 0 0 4px;*/
}
.search-div button {
    position: relative;
    /*border-radius: 0 4px 4px 0;*/
    width: 38px;
    height: 38px;
    border-left: none;
    cursor: pointer;
    border: 1px solid #0078ff;
    background-color: #0078ff;
}
.search-div button:before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    top: 10px;
    left: 10px;
    background: url("../img/common/input-search-icon.png") center 100% no-repeat;
}

/*Navigation Responsive*/
@media(max-width:1440px) {
    .container {
        margin-left: 20px;
        margin-right: 20px;
    }
}

@media(max-width:750px) {
    .container {
        margin-left: 15px;
        margin-right: 15px;
    }
}

@media(max-width:1100px) {
.nav_box {
    box-shadow: 0 1px 10px rgb(0, 0, 0, .1)
}
.nav {
    position: fixed;
    top: -5px;
    left: 0;
    width: 100%;
    z-index: 9999;
    background: #ffffff;
    display: none;
    float: none;
    list-style: none;
    margin: 65px 0 0 0;
    /*border-top: 2px solid #0078ff;*/
    /*box-shadow: 0px 2px 5px rgb(0,0,0,.6);*/
}
.logo {
    width: auto;
    height: 100%;
}
.nav_button {
    display: block;
    margin: 20px 0 17px 0;
}
/*
.nav{
    border-top: 2px solid #0078ff;
    }
*/
.nav li:last-child {
    display: none;
}
.nav li {
    position: relative;
    float: none;
    margin: 0 15px;
}
.nav li a {
    display: block;
    width: 100%;
    height: auto;
    padding: 0;
    margin: 0 auto;
    overflow: auto;
    font-size: 16px;
    line-height: 50px;
    text-align: center;
    border-top: 1px solid #cccccc;
}
#home {
    border-top: 2px solid #0078ff;/*border-top: none;*/
}
.nav li a:hover {
    color: #0078ff;
    border-bottom: none;
}
.active {
    border: none;
}
}
/*viewpager*/
.banner_box {
    max-width: 100%;
}
.index_banner {
    position: relative;
    font-size: 0;
}
.index_banner li {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    aspect-ratio: 16/5;
}
.index_banner li a {
    display: block;
    margin: 0 auto;
}
.index_banner cite {
    position: absolute;
    bottom: 5%;
    z-index: 99;
    display: block;
    height: 10px;
    _display: none;
    width: 100%;
    display: flex;
    justify-content: center;
}
.index_banner cite span {
    float: left;
    display: block;
    margin: 0 4px;
    width: 10px;
    height: 10px;
    box-sizing: border-box;
    border: 2px solid #ffffff;
    text-indent: -999em;
    cursor: pointer;
    border-radius: 50%;
}
.index_banner cite span.cur {
    background: #ffffff;
    cursor: default;
}
/*
.clear{
	clear:both;
	}
*/
.article-box {
    padding: 60px 0 80px;
}
.article-container {
    max-width: 1280px;
    margin: 0 auto;
}
.hot_articles {
    display: grid;
    grid-gap: 30px;
    grid-template-columns: repeat(5,1fr);
}
.item-1{
    grid-column: 1/4;
    grid-row: 1/3;
    background: linear-gradient(60deg, #1fd0d9, #2cddcf);
}
.item-2{
    grid-column: 4/6;
    grid-row: 1/2;
}
.item-3{
    grid-column: 4/6;
    grid-row: 2/3;
}
.item-1,.item-2,.item-3{
    position: relative;
    left: 0;
    bottom: 0;
}
.article {
    overflow: hidden;
    border-radius: 8px;
/*    background: #ffffff;*/
}
.pro_img{
    display: grid;
    justify-content: flex-startf;
/*    place-items: center;*/
    height: 100%;
    position: relative;
    left: 0;
    bottom: 0;
    aspect-ratio: 2/1;
}
.pro_img::before{
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to bottom,rgba(0,0,0,0), rgba(0,0,0,.8));
}
.article img {
    display: block;
/*    width: 100%;*/
    height: 100%;
    overflow: auto;
/*    aspect-ratio: 2/1;*/
}
.article_content {
    position: absolute;
    left: 0;
    bottom: 0;
    padding: 20px;
}
.article_content span{
    color: #0078ff;
    font-size: 12px;
    font-weight: bold;
    padding: 4px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    background: rgba(255, 255, 255,1);
}
.title-h2{
    color: #ffffff;
    width: auto;
    position: relative;
    margin-top: 8px;
    background: transparent;
}
.title-h2::after, .title-h2::before{
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    z-index:-2;
    height: 100%;
    background: transparent;
}
.title-h2:hover{
    z-index:1;
    background: transparent;
}
.title-h2::before{
    background: rgba(0,0,0,.2);
    transition: all 0.3s ease;
    z-index:-1;
}
.title-h2:hover::after, .title-h2:hover::before{
    width: 100%;
}

.item-1 h2 {
    font-size: 36px;
}
.item-2 h2, .item-3 h2 {
    font-size: 24px;
}
.article_content p {
    color: #ffffff;
    font-size: 18px;
    text-align: left;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

/*Responsive*/
@media(max-width: 800px) {
    .hot_articles {
        grid-template-columns: repeat(1,1fr);
    }
    .pro_img{
        place-items: center;
    }
    .item-1{
        grid-column: 1/2;
        grid-row: 1/2;
        background: linear-gradient(60deg, #1fd0d9, #2cddcf);
    }
    .item-2{
        grid-column: 1/2;
        grid-row: 2/3;
    }
    .item-3{
        grid-column: 1/2;
        grid-row: 3/4;
    }
    .article_content{
        padding: 10px;
    }
    .pro_img::before{
        height: 70%;
    }
    .article_content h2{
        font-size: 24px;
    }
    .article_content p{
        
    }
}
.article-content {
    display: grid;
    grid-gap: 30px;
    grid-template-columns: 4fr 2fr;
/*    grid-template-columns: 830px 420px;*/
    margin: 80px 0;
}
/*Lastest Articles*/
.latest-article-box, .recommend-article-box {
    display: grid;
    padding: 20px 0;
    grid-gap: 30px;
    overflow: hidden;
    grid-auto-rows: min-content;
}
.latest-article {
    display: grid;
    grid-gap: 30px;
    grid-template-columns: 2fr 3fr;
/*    grid-template-columns: 328px 472px;*/
}
.latest-img, .recommend-img {
    position: relative;
    right: 0;
    bottom: 0;
    overflow: hidden;
    background: #fafafa;
    aspect-ratio: 2/1;
}
.latest-img img, .recommend-img img {
    display: block;
    width: 100%;
    aspect-ratio: 2/1;
    transition: 0.6s;
}
.latest-img img:hover, .recommend-img img:hover {
    transition: 0.6s;
    filter: brightness(.9);
}
.latest-img:hover, .recommend-img {
    transition: .6s;
}
.latest-img span, .recommend-img span {
    position: absolute;
    right: 10px;
    bottom: 10px;
    color: #ffffff;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    background: rgba(0,0,0,.5);
    z-index: 1;
}
.lastest-title-box {
}
.lastest-title-box h3 {
    font-size: 24px;
    overflow: hidden;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.lastest-title-box h3 a:hover {
    color: #0078ff;
    transition: color 0.3s ease;
}
.lastest-title-box p {
    font-size: 18px;
    overflow: hidden;
    margin: 8px 0 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}
.lastest-title-box time,.recommended-title-box time {
    position: relative;
    font-size: 14px;
    color: #808080;
}
.lastest-title-box time::before,.recommended-title-box time::before {
    margin-right: 8px;
    content: url(../img/common/date.png);
}
.lastest-title-box>a {
    display: inline-block;
    color: #ffffff;
    font-size: 14px;
    padding: 8px 12px;
    border-radius: 4px;
    background: #0078ff;
}
.lastest-title-box>a:hover{
    transition: 0.3s ease;
    filter: brightness(.9);
    box-shadow: 0px 6px 6px -3px rgba(0,120,255,0.4);
}

/*Category | Recommended Articles*/
.sidebar {
    margin: 20px;
}
.search-box{
    margin-bottom: 30px;
}
.search-box,.recommend {
    display: grid;
    grid-template-rows: min-content;
    grid-gap: 30px;
    padding: 20px;
    box-shadow: 5px 5px 15px 0px rgba(0,0,0,0.1);
}
.search-title,.recommend-title {
    display: grid;
    grid-gap: 10px;
    align-items: center;
    grid-auto-flow: row;
    grid-template-columns: max-content;
    border-bottom: 1px solid #cccccc;
}
.search-title p,.recommend-title p {
    font-weight: bold;
    font-size: 24px;
    color: #333333;
}
.search-title span,.recommend-title span {
    height: 2px;
    background: #0078ff;
}
.search-input{
    display: grid;
    justify-content: start;
    grid-auto-flow: column;
    grid-template-columns: 1fr;
}
.search-input input{
    padding: 10px;
    font-size: 14px;
    box-sizing: border-box;
    border: 1px solid #cccccc;
     border-radius: 4px 0 0 4px;
}
.search-input input:hover, .search-input input:focus{
    outline: none;
    border: 1px solid #0078ff;
}
.search-input button{
    position: relative;
    width: 38px;
    height: 38px;
    border-left: none;
    cursor: pointer;
    border: 1px solid #0078ff;
    background-color: #0078ff;
    border-radius: 0 4px 4px 0; 
}
.search-input button::before{
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    top: 10px;
    left: 10px;
    background: url(../img/common/input-search-icon.png) center 100% no-repeat;
}
.recommend-article {
    display: grid;
    grid-gap: 20px;
    grid-template-columns: 1.2fr 2fr;
/*    grid-template-columns: 120px 200px;*/
}
.recommended-title-box h4 {
    font-size: 16px;
    color: #333333;
    margin-bottom: 4px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.recommended-title-box h4 a:hover {
    color: #0078ff;
    transition: color 0.3s ease;
}
@media(max-width:1300px){
    .article-container{
        margin: 0 20px;
    }
}
@media(max-width:1200px) {
    .article-content{
        grid-template-columns: 1fr;
    }
    .recommend-article-box{
        grid-template-columns: 1fr 1fr;
    }
    .recommended-title-box h3{
        font-size: 18px;
        margin-bottom: 12px;
    }
}

@media (max-width:750px) {
    .article-container {
        margin-left: 15px;
        margin-right: 15px;
    }
    .latest-article-box, .recommend-article-box,.latest-article {
        grid-template-columns: 1fr;
    }
    .lastest-title, .recommend-title, .latest-article-box, .recommend-article-box {
        padding: 0;
    }
    .sidebar {
        margin: 0;
    }
    .search-box, .recommend{
        padding: 0;
        box-shadow: none;
    }
    .recommended-title-box h3{
        margin-bottom: 0;
    }
}

/*category*/
.category-box{
    
}
.category-box h1{
    font-size: 44px;
    text-align: center;
    margin-bottom: 60px;
}
#category {
    display: grid;
    grid-auto-flow: column;
    justify-content: center;
    border-bottom: 1px solid #cccccc;
}
#category>li {
    font-size: 18px;
    padding: 12px 40px;
    text-align: center;
    cursor: pointer;
}
.selected {
    color: #0078ff;
    border-bottom: 2px solid #0078ff;
}
.category-div{
    display: none;
}
.category-article {
    display: grid;
    grid-column-gap: 30px;
    grid-template-columns: repeat(2, 1fr);
    padding: 30px 0;
}
.article-div{
    display: grid;
    grid-template-columns: 75% 25%;
    padding: 30px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
/*    border-bottom: 1px dashed #cccccc;*/
}

.article-div h5{
    font-size: 20px;
    font-weight: 500;
    grid-row: 1/2;
    grid-column: 1/2;
    overflow: hidden;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.time{
    color: #808080;
    grid-row: 1/2;
    grid-column: 2/3;
    text-align: right;
}
.resume{
    color: #808080;
    font-size: 16px;
    grid-row: 2/3;
    grid-column: 1/3;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.article-div:hover {
    background: #0078ff;
    transition: all 0.3s ease;
/*    box-shadow: 5px 5px 15px 0px rgba(0,120,255,0.1);*/
}
.article-div:hover .title-h5, .article-div:hover .time, .article-div:hover .resume{
    color: #ffffff;
}
@media(max-width:1036px){
    .category-article{
        padding: 0;
        grid-template-columns: repeat(1, 1fr);
    }
    .article-div{
        padding: 20px 0;
        border-radius: 0;
        border-bottom: 1px dashed #cccccc;
    }
}
@media(max-width:750px){
    #category{
        justify-content: stretch;
    }
    #category>li{
        padding: 12px 0;
    }
}

/*computer/windows/software*/
/*
.class_box {
    display: grid;
    grid-gap: 30px;
    grid-template-columns: repeat(3, 1fr);
}
.class {
    display: grid;
    grid-gap: 30px;
    grid-template-rows: max-content;
    padding: 20px 0;
    background: #ffffff;
}
.species_img, .class_img {
    width: 100%;
    overflow: hidden;
    background: #fafafa;
    aspect-ratio: 2 / 1;
}
.species_img img, .class_img img {
    width: 100%;
    transition: 0.6s;
}
.class_img img:hover {
    transition: 0.6s;
    transform: scale(1.05);
    filter: brightness(90%);
}
.class h2 {
    color: #333333;
    font-size: 24px;
    font-weight: 600;
    cursor: pointer;
    padding-bottom: 15px;
    border-bottom: 3px solid #333;
}
.all_article {
    display: grid;
    grid-gap: 20px;
    grid-template-rows: max-content;
}
.class h3 {
    margin: 10px;
    font-weight: 500;
    font-size: 20px;
    color: #333333;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.class h3 a:hover {
    color: #0078ff;
}
.class_p {
    font-size: 18px;
    color: #808080;
    padding: 0 10px;
}
.category_box {
    display: grid;
    grid-gap: 15px;
    grid-auto-flow: column;
    grid-template-columns: 35% 61%;
}
.category_box img {
    transition: 0.6s;
}
.category_box img:hover {
    transform: scale(1.05);
    filter: brightness(90%);
    transition: 0.6s;
}
.category_box h4 {
    font-weight: 500;
    font-size: 16px;
    color: #333333;
    overflow: hidden;
    margin: 0 0 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.category_box h4 a:hover {
    color: #0078ff;
}
.category_box p {
    font-size: 14px;
    color: #808080;
}
@media(max-width:1440px) {
    .class_box {
        margin: 0 30px;
    }
    .category_box h3 {
        -webkit-line-clamp: 3;
    }
}
@media(max-width:1200px) {
    .class_box {
        grid-template-columns: 1fr;
    }
    .class{
        padding: 0;
    }
    .all_article {
        grid-template-columns: repeat(4, 1fr);
    }
    .category-columns {
        display: grid;
        grid-template-columns: 100%;
        grid-template-rows: 1fr;
        grid-auto-flow: row;
    }
    .class h3 {
        margin: 10px 0;
    }
    .class h3, .category_box h4 {
        font-size: 18px;
    }
    .class_p {
        padding: 0;
    }
    .class_p, .category_box p {
        font-size: 14px;
    }
}

@media(max-width:750px) {
    .class_box {
        margin: 40px 0 0;
    }
    .all_article {
        grid-template-columns: repeat(2, 1fr);
    }
}
*/
/*cookie*/
.cookie-container {
    display: none;
    position: fixed;
    left: 0;
    bottom: 0;
    z-index: 1;
    width: 100%;
    backdrop-filter: blur(5px);
    background: rgba(0,0,0,.7);
}
.cookie-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1440px;
    padding: 16px 0;
    margin: 0 auto;
}
.cookie-div {
    color: #ffffff;
    margin: 0 20px 0 0;
}
.cookie-div>h2 {
    margin: 0;
    padding: 0;
    border: none;
    font-size: 18px;
    font-weight: 500;
}
.cookie-div>p {
    margin: 0;
    font-size: 14px;
}
.cookie-div>p>a {
    color: #ffffff;
    text-decoration: underline;
}
.button-div {
    display: flex;
    flex-direction: row;
}
.cookie-btn {
    border: none;
    cursor: pointer;
    padding: 8px 30px;
    border-radius: 4px;
    white-space: nowrap;
}
.cookie-accept {
    background: #ffffff;
    margin: 0 20px 0 0;
}
.cookie-rejuct {
    color: #ffffff;
    background: transparent;
    border: 1px solid #ffffff;
}
.cookie-accept:hover {
    filter: brightness(.9);
}
.cookie-rejuct:hover {
    color: #333333;
    background: #ffffff;
}

@media(max-width: 1480px) {
.cookie-content {
    padding: 16px 20px;
}
}

@media(max-width: 768px) {
.cookie-content {
    flex-direction: column;
    justify-content: center;
    padding: 16px 20px;
}
.cookie-div {
    margin: 0 0 20px 0;
}
}
/*---cookie end---*/
#btn {
    width: 50px;
    height: 50px;
    position: fixed;
    right: 2%;
    bottom: 220px;
    display: none;
    background-image: url(../img/common/top.webp);
    opacity: 0.5;
    -webkit-filter: grayscale(100%);
    filter: grayscale(100%);
    z-index: 9999;
}
#btn:hover {
    opacity: 1;
    -webkit-filter: grayscale(0);
    filter: grayscale(0);
}
/*share*/
.share-box {
    position: fixed;
    top: 30%;
    left: 0;
    width: 48px;
    height: auto;
    transition: .3s;
    z-index: 999;
}
.share-box ul li a {
    width: 48px;
    height: 48px;/*
    margin: 10px 0;
    border-radius: 50%;
*/
}
.share-box ul li a:hover {
    width: 58px;
    transition: .6s;
    border-radius: 0 5px 5px 0;
}
.facebook-button {
    background: #4267B2 url("../img/common/share-facebook.png") no-repeat center;
}
.twitter-button {
    background: #000000 url("../img/common/share-twitter.png") no-repeat center;
}
.linkedin-button {
    background: #0275b4 url("../img/common/share-linkedin.png") no-repeat center;
}
.pinterest-button {
    background: #c82129 url("../img/common/share-pinterest.png") no-repeat center;
}
.tumblr-button {
    background: #34526f url("../img/common/share-tumblr.png") no-repeat center;
}

@media(max-width:1100px) {
    .share-box {
        display: none;
    }
}
/*footer*/
.footer_box {
    max-width: 100%;
    overflow: auto;
    background: #1a1a1a;
}
.footer_a {
    display: flex;
    flex-direction: column;
    max-width: 1440px;
    margin: 0 auto;
}
.footer_content {
    display: flex;
    justify-content: space-between;
    max-width: 100%;
    overflow: auto;
    padding: 60px 0;
}
.footer_buttom img {
    padding-bottom: 20px;
}
.footer_buttom a {
    margin-top: 30px;
}
.footer {
    float: left;
    overflow: auto;
}
.bottom_nav {
    margin-bottom: 15px;
    font-size: 20px;
    font-weight: 600;
    color: #ffffff;
}
.footer li a {
    line-height: 40px;
    font-size: 16px;
    color: #e6e6e6;
}
.contact_box li a img {
    width: 60%;
    transition: .5s;
}
.contact_box li a img:hover{
    transition: .5s;
    transform: translateY(-5px);
}
/*clear*/
.clear {
    display: none;
    clear: both;
}
.footer_contact {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.copyright {
    color: #ffffff;
    font-size: 16px;
    text-align: center;
    padding: 10px 0;
    border-top: 1px solid #000000;
}
.contact {
    font-size: 22px;
    color: #ffffff;
}
.contact_box {
    margin-top: 10px;
}
.contact_box li {
    float: left;
    list-style: none;
    margin-right: 30px;
}

/*Responsive*/
@media(max-width:1440px) {
    .footer_a {
        margin: 0 20px;
    }
}

@media(max-width:1000px) {
    .footer_a {
        flex-wrap: wrap;
    }
}

@media(max-width:800px) {
    .footer_box {
        margin-top: 30px;
    }
    .footer_content {
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    .footer_item,.footer_buttom {
        width: 100%;
        padding: 20px 0;
        border-bottom: 1px solid #ffffff;
    }
    .footer:last-child {
        border: none;
    }
    .bottom_nav, .copyright, .contact {
        font-size: 18px;
    }
    .footer li a {
        line-height: 30px;
        font-size: 14px;
    }
    .contact_box li {
        margin-right: 20px;
    }
    .contact_box li a img {
        width: 60%;
    }
}
/* reading progress bar */
:root {
    --progress-color-light: #00aaff; /* light mode color */
    --progress-color-dark: #ff5722; /* dark mode color */
  }
  
  progress {
    position: fixed;
    top: env(safe-area-inset-top); /* Adapt to the notch screen */
    left: 0;
    width: 100%;
    height: 2px;
    border: none;
    background: transparent;
    z-index: 9999;
    pointer-events: none; /* Prevent intercept click events */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
  }
  
  progress::-webkit-progress-value {
    background: var(--progress-color, var(--progress-color-light)); /* The default is bright mode */
    transition: width 0.2s ease-out; 
  }
  
  progress::-moz-progress-bar {
    background: var(--progress-color, var(--progress-color-light));
    transition: width 0.2s ease-out;
  }
  
  progress::-webkit-progress-bar {
    background: transparent; /* Make sure the WebKit browser background is transparent */
  }
    
  /* dark mode adaption */
  @media (prefers-color-scheme: dark) {
    progress::-webkit-progress-value {
      background: var(--progress-color, var(--progress-color-dark));
    }
    progress::-moz-progress-bar {
      background: var(--progress-color, var(--progress-color-dark));
    }
  }

  @media (max-width: 750px) {
    #reading-progress {
      display: none; /* hide progress bar on mobile */
    }
  }