.abs {
        position: absolute;
    }
    
    .main {
        display: flex;
        max-width: 100vw;
        margin: 50px 0;
        margin-bottom: 150px;
        /* padding: 0 70px; */
        justify-content: center
    }

    #loading-screen {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: #000; /* Or any color you prefer */
        z-index: 9999;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    #loading-screen img {
        max-width: 100px; /* Adjust size as needed */
        max-height: 100px; /* Adjust size as needed */
        /* animation: blink 4s linear infinite; */
    }

    #loading-screen video {
        width: 50vw; /* 设置视频宽度为视口宽度的50% */
        height: auto; /* 保持视频的纵横比 */
    }
    
    /* Define the keyframes for the blink animation */
    @keyframes blink {
        0%, 100% {
            opacity: 1;
        }
        50% {
            opacity: 0;
        }
    }
    
    .main .menubg {
        position: relative;
        flex: none;
        width: 347px;
        /* border-radius: 20px; */
        /* margin: 50px 0; */
        overflow: hidden;
        transition: width .5s;
        color: #000;
        font-family: 'EB Garamond';
    }
    
    .main .menubg #menu {
        position: sticky;
        padding: 30px 0;
        /* width: 100%; */
        /* transition: width .5s; */
        background-color: #D3DDF5;
    }
    
    .main .menubg #menu .t1 {
        position: relative;
        text-transform: capitalize;
        margin: 20px;
        font-size: 36px;
        transition: .5s;
        padding-left: 56px;
        /* overflow: hidden; */
        white-space: nowrap;
        /* 强制文本在一行内显示 */
        overflow: hidden;
        /* 隐藏超出容器的文本 */
        text-overflow: ellipsis;
    }
    
    .main .menubg #menu .t1::before {
        /* opacity: .3; */
        position: absolute;
        content: "";
        display: block;
        height: 45.88px;
        width: 43px;
        left: 0;
        top: 8px;
        /* transform: translateX(-100%); */
        /* transition: .5s; */
        background-image: url(https://static.igem.wiki/teams/5482/other/menu-unselected.png);
        background-size: contain;
        background-repeat: no-repeat
    }
    
    .main .menubg #menu .t1:hover::before {
        /* opacity: 1 */
        background-image: url(https://static.igem.wiki/teams/5482/other/menu-selected.png);
        width: 256.55px;
    }
    /* .main .menubg #menu .t1.unfold::before {
        top: 10px
    } */
    
    .main .menubg #menu .t1.unfold {
        font-size: 36px;
    }
    
    .main .menubg #menu .t1.unfold+.h2-sec {
        grid-template-rows: 1fr;
        opacity: 1;
        font-size: 24px;
    }
    
    .main .menubg #menu .t1.unfold+.h2-sec .t2 {
        text-transform: capitalize;
        padding: 3px 15px;
        border-radius: 5px;
        white-space: nowrap;
        /* 强制文本在一行内显示 */
        overflow: hidden;
        /* 隐藏超出容器的文本 */
        text-overflow: ellipsis;
    }
    
    .main .menubg #menu .h2-sec {
        overflow: hidden;
        display: grid;
        /* grid-template-rows: 0fr; */
        transition: grid .5s, opacity .8s;
        opacity: 1;
        font-size: 0;
        padding-left: 60px;
    }
    
    .main .menubg #menu .h2-sec .t2 {
        transition: .8s;
        min-height: 0
    }
    
    .main .menubg #menu .divide {
        opacity: 1;
        height: 0;
        width: fit-content;
        position: relative;
        margin-top: 0;
        left: 15px;
        transition: .8s
    }
    
    .main .menubg #menu .t1.unfold+.h2-sec .divide {
        height: 20px;
        margin-top: 5px;
        opacity: 1
    }
    
    .main .menubg #menu .divide img {
        height: 100%;
        object-fit: contain;
        object-position: center
    }
    
    .main .menubg #menu.fixed {
        position: fixed;
        top: 83px;
        width: 347px
    }
    
    .atbottom {
        position: relative;
        bottom: 0;
    }
    
    .main #content {
        position: relative;
        flex: 1;
        max-width: 1112px;
        padding: 30px 50px;
        /* border-radius: 20px; */
        transition: width .5s;
        background-color: #fff;
        color: #000
    }
    
    .main #content::before {
        content: "";
        display: block;
        position: absolute;
        z-index: -1;
        width: 100%;
        height: 100%;
        border-radius: 20px;
        top: 20px;
        left: 15px
    }
    
    .main #content .s1 {
        margin: 30px 0;
        width: 100%
    }
    
    .main #content .s1.ref p {
        text-indent: 0;
        font-size: .8em;
        text-align: left
    }
    
    .main #content .s1 p {
        padding-left: 40px
    }
    
    .main #content .s2 {
        margin: 20px 0;
        width: 100%
    }
    
    .main #content .s2 p {
        padding-left: calc(40px + 2em)
    }
    
    .main #content .math {
        width: 100%;
        overflow-x: auto;
        overflow-y: hidden;
        padding-left: 40px
    }
    
    .main #content .h1-wrap {
        width: -moz-fit-content;
        width: fit-content;
        position: relative;
        margin: 40px 0
    }
    
    .main #content .h1-wrap h1 {
        padding: 2px;
        letter-spacing: .02em;
        font-family: 'EB Garamond';
        font-weight: bold;
    }
    
    .main #content h2 {
        margin: 30px 20px
    }
    
    .main #content p {
        width: 100%;
    margin: 10px 0;
    text-align: justify;
    line-height: 1.7;
    font-size: 1.4rem;
    }
    
    .main #content p.no-indent {
        text-indent: 0
    }
    
    .main #content img,
    .main #content video {
        vertical-align: bottom;
        max-width: 100%;
        height: 400px;
        -o-object-fit: cover;
        object-fit: cover;
        -o-object-position: center;
        object-position: center
    }
    
    .main #content .img-wrap {
        width: 100%;
        display: flex;
        margin: 15px 0;
        padding-left: 40px;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 10px
    }
    
    .main #content .img-wrap img {
        object-fit: contain
    }
    
    .main #content .img-wrap .border {
        position: relative;
        width: -moz-fit-content;
        width: fit-content;
        height: -moz-fit-content;
        height: fit-content;
        border: 1px solid var(--y);
        box-shadow: 5px 6px var(--y);
        overflow: hidden;
        background-color: #fff
    }
    
    .main #content .img-wrap .disc {
        font-size: .8em
    }
    
    .main #content .o-o {
        display: flex;
        gap: 20px
    }
    
    @media all and (max-width: 920px) {
        .main .menubg {
            width: 0;
            margin: 0
        }
        .main .menubg #menu,
        .main .menubg #menu.fixed {
            width: 0;
            opacity: 1;
            pointer-events: none
        }
        .main #content {
            min-width: calc(100vw - 100px)
        }
        .poster {
            width: calc(100vw - 100px);
            margin-left: 50px;
            transition: width .5s
        }
        .poster .title {
            font-size: min(60px, 10vw);
            left: 50%;
            transform: translate(-50%, -50%)
        }
        #gotop {
            height: max(30px, 15vw)
        }
    }
    
    @media all and (max-width: 700px),
    all and (max-aspect-ratio:2/3) {
        .main {
            gap: 0;
            background-color: #fffdf7!important;
            margin-bottom: 0;
            padding: 0!important
        }
        .main #content {
            flex: -1;
            flex-grow: -1;
            flex-shrink: -1;
            width: 100vw!important;
            max-width: 100vw;
            margin: 0;
            padding: 0 20px;
            background-color: #fffdf7
        }
        .main #content.mem {
            background-color: var(--bg)!important
        }
        .main #content::before {
            display: none
        }
        #gotop {
            height: 25vw;
            display: none
        }
        .main #content h2,
        .main #content h3,
        .main #content p {
            max-width: 100%;
            padding-left: 0!important;
            margin-left: 0!important;
            text-align: left!important
        }
        .main #content p.quote {
            padding-left: 20px!important
        }
        .main #content .img-wrap {
            padding-left: 0!important
        }
        .main #content .img-wrap img {
            height: 200px
        }
    }
    
    #content h1,
    #content h2 {
        position: relative;
        display: flex;
        gap: .6em;
        align-items: end;
    }
    
    #content h1 {
        gap: .4em;
    }
    
    #content .time {
        text-wrap: nowrap;
        position: relative;
        bottom: 7px;
        display: block;
        font-family: "Nunito-Bold";
        font-size: 0.5em;
        background-color: var(--y);
        color: var(--bg);
        padding: 3px 7px;
        border-radius: 5px;
    }
    
    #content h1 .time {
        font-size: 0.4em;
    }
    
    #content .s1 p.question {
        position: relative;
        width: calc(100% - 40px);
        padding: 5px 20px;
        padding-left: 50px;
        margin-left: 40px;
        border-radius: 5px;
        text-indent: 0;
        font-family: "Nunito-Bold";
        color: var(--y);
        border: 2px solid var(--y);
    }
    
    #content .s1 p.question::before {
        content: "?";
        display: block;
        position: absolute;
        display: flex;
        justify-content: center;
        align-items: center;
        left: 10px;
        top: 50%;
        width: 25px;
        height: 25px;
        border-radius: 50%;
        background-color: var(--y);
        color: var(--bg);
        transform: translateY(-50%) rotate(15deg);
    }





    #down {
        display: flex;
        flex-direction: row;
        width: 100%;
        max-width: 1556px;
        height: 360px;
        justify-content: space-between;
        margin: 0 auto;
        margin-bottom: 80px;
    }
    
    .box {
        width: calc(100% / 4 - 20px);
        height: 100%;
        border-radius: 50px;
        background-color: #fff;
        display: flex;
        flex-direction: column;
        align-items: center;
        position: relative;
        padding: 0 20px;
        padding-top: 40px;

    }
    
    .title {
        font-size: 36px;
    }
    
    .gradient-text {
        font-family: 'Yeseva One';
        font-size: 48px;
        text-decoration-line: none;
        background-image: linear-gradient(90deg, rgba(250, 175, 175, 1) 0%, rgba(197, 227, 182, 1) 0%, rgba(130, 214, 66, 1) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 20px;
        text-align: center;
    }
    
strong {
    font-size: larger;

}

    .description {
        font-size: 24px;
        margin-bottom: 60px;
        text-align: center;
    }
    
    .arrow-image {
        width: 145px;
        height: 90px;
        position: absolute;
        right: 28px;
        bottom: 10px;
    }
    
    .arrow-text {
        width: 100%;
        height: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 24px;
        color: #fff;
        position: absolute;
        right: 44px;
        bottom: 12px;
    }



    
    .progress-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 12px;
        background-color: #96a1a4;
        z-index: 9999;
        overflow: visible !important;
      }
      
      .progress-bar span {
        display: block;
        height: 100%;
        background-color: #fbe986;
        width: 0%;
    
        position: relative; /* 设置相对定位 */
      }
    
      .progress-bar span::after {
        content: ''; /* 必须设置 content 属性 */
        position: absolute;
        top: 50%;
        right: -26px;
        transform: translateY(-70%);
        width: 50px;
        height: 50px;
        background: url('https://static.igem.wiki/teams/5482/single-sun.png') no-repeat center center; /* 小人图片 */
        background-size: cover;
        transition: right 0.5s; /* 平滑移动效果 */
      }

      .desc-content-img-desc {
        width: 100%;
        text-align: center;
        margin-top: 8px;
        color: #444444d1;
        font-size: 1.2rem;
    }

    .article-desc-sub-sub-title {
        font-size: 1.7rem;
        font-weight: 700;
        margin: 1.5rem 0 0 0;
    }

    .article-desc-sub-sub-sub-title {
        font-size: 1.5rem;
        font-weight: 700;
        margin: 1rem 0 0 0;


        
    }
    
    

    h1 {
        margin-left: 0 !important;
        font-family: 'Lucida Handwriting', cursive;

    }

    h2 {
        margin-left: 0 !important;
        font-family: 'EB Garamond';
        font-weight: bold;
        font-size: 2.4rem;

    }
    


    table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }
    th, td {
        border: 1px solid #ddd;
        padding: 8px;
        text-align: left;
    }
    th {
        background-color: #f2f2f2;
    }
    tr:nth-child(odd) {
        background-color: #a0dfc330;
    }
    
    tr:nth-child(1) {
        background-color: #a0dfc3b3;
        font-weight: bold;
    }
    
    tr:hover {
        background-color: #327d5c30;
    }