@font-face {
    font-family:Nexa;
    src: url(../Font/NexaDemo-Bold.ttf);
}

/* body */
body{
    font-family: "Nexa" , "HarmonyOS Sans SC";
}

/* 上方工具栏 */
.topbar{
    position: fixed;
    
    top:-3vh;
    left: 4vw;
    width: 94vw;
    min-height: 9vh;
    max-height: 9vh;

    border-radius: 15px;
    background-color: white;
    box-shadow:0px 2px 8px 1px gray;

    z-index: 50;
}

/* 工具栏里的项目 */
.topbar_item{
    margin-top: 4.5vh;
    margin-left: 2vw;

    font-size: 16px;

    color: #000;

    transition: color 0.3s;
}

.topbar_item:hover{
    color: gray;
}

/* 侧边栏 */
.sidebar{
    position: fixed;

    top:1vh;
    left:-23.5vw;
    min-width: 25vw;
    max-width: 25vw;
    min-height: 98vh;
    max-height: 98vh;

    background-color: white;
    background-color: white;
    border-radius: 15px;
    box-shadow:0px 2px 8px 1px gray;

    transition: left 1s;
    
    z-index: 52;
}

.sidebar:hover{ /* 将鼠标移到/用户点击侧边栏时，侧边栏的动画 */
    left: -5vw;
}

/* 大图 */
.topintroduce{
    background-repeat: no-repeat;
    background-size:cover;
    background-size: auto 100%;
    background-position:50%;
    
    width: 100%;
    min-height: 60vh;

    border-radius: 12px;
}

/* 文章显示区域 */
.textzone{
    margin-top: 8vh;
    margin-left: 5vw;
    margin-right: 3vw;
    padding-bottom: 10vh;
}

/* 侧边栏的项目 */
.sidebar_items{
    display: block;
    
}

.card1{
    width: 30vw;
    min-height: 25vh;

    border-radius: 12px;

    font-size: 48px;
    color: #FFF;

    padding-top: 6.5vh;
}

a{text-decoration: none;}