.banner_text_container {
    background-color: rgba(0, 0, 0, .8);
    padding: 20px 80px;
}

.banner_text_body {
    font-size: 4rem;
    letter-spacing: 10px;
    color: #ffffff;
}



.item_container {
    width: 200px;
    margin-right: 20px;
    margin-bottom: 20px;
    border: solid 1px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.item_container img {
    width: 100%;
    transition: .5s;
    cursor: pointer;
}

.item_container img:hover {
    transform: scale(102%);
}

.item_container div {
    text-align: center;
    letter-spacing: 1px;
    z-index: 55;
    color: #333;
}


.item_container_wide {
    width: 400px;
}


.item_title {
    color: #1472ff;
    font-size: 1.5rem;
    font-weight: bold;
}

#page_navi {
    position: fixed;
    top: 100px;
    left: 0px;
    transition: 1s;
    border-right: solid 1px #eee;
}

#directory_item_container {}

.navi_link {
    display: block;
    /* padding: 4px 40px 4px 10px; */
    text-align: center;
    padding: 8px 40px;
    transition: .5s;
    color: #666;
    cursor: pointer;
}

.directory_highlighted {
    background-color: #1472ff;
    color: #ffffff;
    font-weight: bold;
}


/* 导航器断点 */
@media screen and (max-width:1000px) {
    #page_navi {
        display: none;
    }

    .item_container {
        width: 100px;
        margin-right: 4px;
    }
}

/* 移动端断点 */
@media screen and (max-width:800px) {
    .banner_text_container {
        padding: 10px 20px;
    }

    .banner_text_body {
        font-size: 2rem;
        letter-spacing: 10px;
    }
}