* {
    margin:0; 
    padding: 0;
    list-style: none;
    font-size: 20px;
}

/*region导航*/

header{
    position: sticky;
    top:0;
    z-index: 100;
  
}

.nav-container .container{
    height:80px;
    background-image:radial-gradient(ellipse at left, rgba(88,159,125), rgba(88,159,125),rgba(88,159,125));
    
}

.menu-active1{
   display: flex;
   margin-right: 25px;
   margin-top: 20px;
}

.logo .brand{
position: absolute;
margin: 15px 100px;
}
.menu-list{
    border-radius:10px;
    width: 200px;
    height: 40px;
    text-align: center;
    line-height: 34px;
    transition: 3s;
    cursor: pointer;
   
}
.menu-list:hover{
    background-color: #589F7D;

}
.menu-list li:hover{
    background-color:#6fd3a3;
    }

.menu-list li{
    height:0;
    transition: 1s;
    opacity: 0;
    transform: translateY(-36px);
    background-color:#589F7D;
}
.menu-list li:last-child{
    border-bottom-left-radius:10px;
    border-bottom-right-radius:10px;
    padding-bottom: 5px;
}
.menu-list:hover li{
    height: 34px;
    opacity: 1;
    transform: translateY(0);
}

header .mobile-menu {
    display: none; }
/*endregion导航*/

/*f返回首页*/
.right-aside {
    position: fixed;
    bottom: 30px;
    right: 20px;
}

/*region标题*/
.content-row-list {
    width: 100%;
 }
 
 .content-row-list>.row-cols-1 {
    display: flex;
    background: #C9E4D4;
 }
 
 .content-row-list>.row-cols-1>.content-col-4 {
    width: 33.33%;
 }
 
 .content-row-list>.row-cols-1>.content-col-4>img {
    width: 80%;
 }
 
 .content-row-list>.row-cols-1>.content-col-4-h1 {
    width: 33.33%;
    margin-top: auto;
    margin-bottom: auto
 }
 
 .content-row-list>.row-cols-1>.content-col-4-h1>h1 {
    color: var(--text-title);
    text-transform: uppercase;
    font-weight: bolder;
    text-align: center;
    font-size: 2.5rem;
    color: #6bd898;
 }
/*endregion标题*/
 


/*region侧栏*/
.contain-list{
    width: 20%;
    
    background-color: rgb(255, 255, 255);
    position: sticky;
    top:80px;
}
.left-list{
   text-align: right;
   padding-right: 10%;
   border-right:3px solid black;
   margin-top: 10pt;
   
}
.left-list h1{
    font-family: 'school';
    line-height: 50pt; 
}
.left-list h1 a{
    font-size: 17pt;
}
.left-list h1 a:hover{
    color:#6fd3a3;
    }
/*endregion侧栏*/


/*region内容*/
.contain-list1{
    width: 75%;

    background-color: rgb(255, 255, 255);
    margin-right: 30pt;
}
 
.right-list h2{
    font-weight: 700;
    font-size: 21pt;
    line-height: 50pt;
   text-align: center;
   margin-top:  50pt;
}
.right-list h3{
   text-align: justify;
   font-size: 17pt;
   text-indent: 2em;
}

img{
    margin: 0 auto;
}
.left-list a{
    color: black;
    font-size: 20pt;
    font-weight: 700;
}
.right-list h2:first-of-type{
    margin-top: 10pt;}
.space{
        height:20pt;
    }

/*region内容*/
/*endregion结尾*/
.right-aside{
    position: fixed;
    bottom: 30px;
    right: 20px;
}
footer{
    background-color: #589F7D;
    margin-top: 200px;
}
.fbox{
    width: 1200px;
    margin: 0 auto;
    display: flex;
}
.fleft{
    flex: 30%;
}
.frihgt{
    flex:70%;
}
.pics{
    display: flex;
}
.pitem{
    flex: 1;
    padding-left: 50px;
    margin: 20px 0;
}
#back-to-top-button {
    display: none; /* 默认情况下隐藏图片 */
    position: fixed;
    bottom: 2px;
    right: 2px;
    z-index: 99;
    cursor: pointer;
}