/******* 网站介绍 *******/
#main{
    width: 60%;
    margin: 0px auto 40px auto;
}
#index-profile{
    margin-top: 30px;
    padding-bottom: 20px;
    text-align: center;
    border-bottom: 1px solid #e4ecf3;
}
#index-profile p.title{
    padding: 15px 0px;
    font-size: 34px;
    color: #494d55;
}
#index-profile p.info{
    font-size: 18px;
    color: #666;
    line-height: 1.5em;
}

/******* 栏目列表 *******/
#catalog-list{
    display: flex;
    flex-wrap: wrap; /* 允许换行 */
    justify-content: space-between; /*两端对齐*/
    padding-top: 10px;
}
#catalog-list a{
    width: calc(50% - 20px); /* 减去间距 */
    padding-bottom: 20px;
    padding-top: 20px;
    margin-top: 20px;
    border: 1px solid #e1eaf2;
    border-radius: 4px;
    background-color: #f5f8fa;
    font-size: 20px;
    color: #444;
}

/**************最近更新**************/
#recent-update-title{
    margin: 25px auto 15px auto;
    text-align: center;
    font-size: 24px;
    font-weight: normal;
}
#recent-update{
    margin: auto 12px;
    border-top: 1px solid #ddd;
}
#recent-update li{
    display: table;
    padding: 10px 0px;
    width: 100%;
    border-bottom: 1px solid #ddd;
}
#recent-update li span.table-cell{
    display: table-cell;
}
#recent-update li span.table-cell:first-child{
    padding-left: 12px;
    text-align: left;
}
#recent-update li span.table-cell:last-child{
    min-width: 100px;
    padding-right: 12px;
    vertical-align: middle;
    text-align: right;
}
#recent-update li a{
    color: #444;
}
#recent-update li span.time{
    color: #777;
}


/******* 自适应 *******/
@media all and (max-width: 1300px){
    #main{
        width: 80%;
    }
}
@media all and (max-width: 1100px){
    #main{
        width: 90%;
    }
}
@media all and (max-width: 960px){
    #main{
        width: 95%;
    }
}
@media all and (max-width: 800px){
    #main{
        width: 100%;
    }
    #catalog-list{
        padding: 10px 12px 0px 12px;
    }
    #recent-update{
        margin: auto;
    }

}

@media all and (max-width: 560px){
    #catalog-list a{
        width: calc(50% - 13px); /* 减去间距 */
    }
}
@media all and (max-width: 460px){
    #catalog-list a{
        width: calc(100%); /* 减去间距 */
    }
}