body {
    background: #F3F5F7;
}

.books-content {
    width: 1200px;
    min-height: 600px;
    margin: 0 auto;
    display: flex;
    margin-top: 30px;
}

.books-type-box {
    width: 280px;
}

.books-type-box li,
.collapse-list ul li {
    height: 50px;
    line-height: 50px;
    padding: 0 20px;
}

.books-type-title {
    color: #fff;
    background: #1D80F7;
    border-radius: 4px 4px 0px 0px;
}

.books-type {
    background-color: #fff;
}

.books-type a {
    display: inline-block;
    width: 100%;
    border-bottom: 1px dashed #E0E0E0;

}

.el-collapse-item__header {
    padding: 0 20px;
    font-weight: bold;
}

.collapse-list ul li {
    height: 40px;
    line-height: 40px;
    cursor: pointer;
}

.circle {
    display: inline-block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: #C2C2C2;
    margin-right: 8px;
}

.colla-active-tab {
    background: #E7EFFF;
    color: #1D80F7;
}

.colla-active-tab span {
    background-color: #1D80F7;
}

.active-tab {
    background: #E7EFFF;
}

.active-tab a {
    color: #1D80F7;
}

.el-collapse-item__header {
    color: #333;
    font-weight: bold;
}

.source-left-box {
    margin-right: 20px;
}

.source-right-box {
    width: 100%;
    background-color: #fff;
}

.source-title-box {
    height: 50px;
    line-height: 50px;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    background-image: url('../img/source_bg.png');
    background-size: cover;
}

.upload-box {}

.upload-btn {
    width: 100px;
    height: 32px;
    line-height: 32px;
    padding: 0;
    text-align: center;
    margin-top: 9px;
}

.upload-box .el-button--primary {
    background-color: #fff;
    border: 1px solid #1D80F7;
    color: #1D80F7;
}

.user-photo {
    width: 24px;
    height: 24px;
    vertical-align: middle;
    margin-right: 6px;
}

.source-list {
    padding: 20px;
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.source-list li {
    background-color: #fff;
    box-shadow: 0px 2px 8px 0px rgba(229, 229, 229, 0.5);
    border-radius: 4px;
    margin-bottom:20px;
    margin-right: 10px;
    width: calc((100% - 30px) / 4);
}

.source-list li:nth-child(4n+4) {
    margin-right: 0;
}

.zip-photo {
    width: 100%;
    height: 180px;
    padding: 30px 40px;
}

.source-title {
    padding: 10px 14px;
    height: 60px;
}

.source-down {
    padding: 0 14px;
    justify-content: space-between;
    line-height: 32px;
    margin-bottom: 15px;
}

.source-time {
    color: #999999;
}

.download-btn {
    width: 44px;
    height: 24px;
    text-align: center;
    padding: 0;
}