body {
    position: inherit !important;
}

html,
body {
    background: #f6f6f6;
}

#course::after {
    content: '';
    position: absolute;
    bottom: -12px;
    width: 0.346667rem;
    height: 0.04rem;
    background: #ffd43f;
    border-radius: 2px;
    left: 50%;
    transform: translateX(-50%);
}


.list_item {
    width: 1.9rem;
    height: .75rem;
    line-height: .83rem;
    text-align: center;
    border-radius: .4rem;
    font-size: .333333rem;
    color: #3d3d3d;
    margin-bottom: 0.4rem;
    float: left;
    /* border-radius: 20px; */
    display: flex;
    justify-content: center;
    align-items: center;
    /* margin-right: 0.2rem; */
    margin-left: 0.5rem;
}


.nav {
    position: fixed;
    clear: both;
    width: 9.6rem;
    /* width: 9.44rem; */
    height: 1.3rem;
    /* height: 1.066667rem; */
    margin: auto;
    display: flex;
    z-index: 2000;
    background: #F3F3F3;
    line-height: 1.3rem;
    display: flex;
    align-items: center;
}

.nav .nav_btn {
    width: 4rem;
    height: .773333rem;
    float: left;
    text-align: center;
    color: white;
    font-size: .3384rem;
    background-color: #ffd43f;
    border-radius: .64rem;
    margin-right: 0.2rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav .nav_current {
    background-color: white !important;
    color: #ffd43f !important;
    border: .05rem solid #ffd43f !important;
    height: .678rem;
}

#nav_btn_version {
    margin-right: 0;
}

.nav .nav_btn img {
    width: .22rem;
    height: .15rem;
    margin-left: 0.1rem;
    display: inline-block;
}



input {
    border: none;
}


/* item */
.items {
    display: flex;
    flex-wrap: wrap;
    overflow-y: scroll;
    margin-bottom: 1.5rem;
    /* scrollbar-width: none; */
    width: 100%;
}
.items::-webkit-scrollbar {
    display: none;
}
.item {
    margin-bottom: 0.7rem;
    margin-bottom: 0.7rem;
    margin-right:4%;
    width: 22%;
    cursor: pointer;
}

.item:nth-of-type(4n){
    margin-right: 0;
}
.item_img {
    width: 264px;
    height: 104px;
}

.item .item_img img {
    width: 100%;
    height: 100%;
    border-radius: 5px 5px 0 0;
    background-size: 100% 100%;
}

.item .item_text {
    width: 97%;
    height: 61px;
    background-color: white;
    padding-left: 3%;
    border-radius: 0 0 5px 5px;
    box-shadow: 0px 7px 21px 0px rgba(2, 1, 1, 0.1);
}

.item .item_text .item_type {
    display: block;
    color: #333;
    font-size: 16px;
    padding: 5px 0;
}

.item .item_text .item_name {
    color: #777;
    font-size: 14px;
    display: block;
}



input[type="button"],
input[type="submit"],
input[type="reset"] {
    -webkit-appearance: none;
}

textarea {
    -webkit-appearance: none;
}

/* 
如果还有圆角的问题，  */
.button {
    border-radius: 0;
}

.loadFun {
    width: 10rem;
    height: 1.2rem;
    line-height: 1rem;
    text-align: center;
    font-size: 0.3rem;
    color: #b2b2b2;
    margin-bottom: 1.1rem;
}

.noMore {
    width: 10rem;
    height: 1.2rem;
    line-height: 1rem;
    text-align: center;
    font-size: 0.3rem;
    color: #b2b2b2;
    margin-bottom: 1.1rem;
    display: none;
    position: absolute;
    bottom: 0.2rem;
}

/* 我是有底线的 */
.upwarp-nodata {
    font-size: .18rem;
    padding: 0.5rem 0 2rem 0;
}

/* 提示语外面的父盒子 */
.mescroll-upwarp {
    min-height: 30px;
    padding: 15px 0;
    text-align: center;
    visibility: hidden;
    position: relative !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    bottom: 1.8rem;
    width: 10rem;
    height: 1rem;
}

/* 开始的加载条 */
.upwarp-progress {
    position: absolute;
    left: -200%;

    transform: translateX(50%);
}

/**/
.select_title {
    font-size: 16px;
    margin-top: 39px;
    cursor: pointer;
}

.select_nav {
    margin-top: 27px;
}

.select_nav .nav-item,
.all_item {
    display: inline-block;
    width: 82px;
    height: 32px;
    border-radius: 5px;
    text-align: center;
    line-height: 32px;
    margin-left: 40px;
    margin-bottom: 24px;
    font-size: 16px;
    color: #333333;
}

.nav-item:hover {
    cursor: pointer;
    color: #ffd43f;
}

.book-name:hover {
    color: #ffd43f;
}

.item_active {
    color: #ffd43f;
}

.all_item {
    background: #ffd43f;
    color: #282828 !important;
}

.nianji,
.xueke,
.banben,
.ceci {
    font-size: 16px;
    color: #666666;
    display: flex;
    flex-wrap: wrap;
}
/* .ceci .item {
    margin-left: 35px;
} */

.nianji .item,
.xueke .item,
.banben .item,
.ceci .item {
    font-size: 16px;
    color: #333333;
}

.nav-item {
    margin-left: 5%;
}

#bot-load {
    position: absolute;
    z-index: 100;
    bottom: 200px;
    left: 50%;
}

/*缺省图*/
.nodata1 {
    text-align: center;
    display: none;
    margin-top: 8%;
}

.nodata1 {
    margin-top: -3%;
}

.nodata1 p {
    font-size: 16px;
    color: rgba(153, 153, 153, 1);
    margin-top: 2%;
}
.nodata{
    height: auto;
}