/*定义加载动画*/
@keyframes pageEnter{
    from{
        opacity: 0;
        transform: translateY(50px);
    }
    to{
        opacity: 1;
        transform: translateY(0px);
    }
}

ul{
    list-style: none;
    margin: 0;
    padding: 0;
}

/*正文*/
.passage_container{
    height: auto;
    width: 100%;
    max-width: 1000px;
    padding: 30px 50px 50px 50px;
    margin: 80px auto 0 auto;
    background: white;
    border-radius: 5px;
    box-shadow: 0 2px 30px rgba(0,0,0,0.2);

    animation: pageEnter 1s ease forwards;
}

/*正文标题：居中加粗*/
.passage_title_container{
    width: 100%;
    height: auto;

    padding: 0 0 20px;
    margin: 0 auto;

    border-width: 0 0 1px;
    border-color: rgba(128, 128, 128, 0.422);
    border-style: solid;
}

.passage_title{
    height: auto;
    text-align: center;
    font-weight: bold;
    font-size: 40px;
    margin: 0 auto;
}

.passage_title_info{
    text-align: center;
    letter-spacing: 5px;
    width: 100%;
    color: gray;
    font-size: 18px;
    margin: 0 auto;
}

/*正文*/
.passage_main_container{

    padding: 30px 0 0 0;
    width: 100%;

    margin: 0 auto;
}

.passage_main{
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.passage_main > li{
    list-style: none;
    display: flex;
    align-items: center;
    font-size: 20px;
    text-indent: 2em;
    padding: 0;

    margin: 10px 0;
}