.change-tab-box {
    height: 1.28rem;
    background: #FFFFFF;
    box-shadow: 0px 0.026667rem 0.186667rem 0px rgba(0, 0, 0, 0.09);
    display: flex;
    align-items: center;
    justify-content: space-around;
}

.change-tab-item {
    cursor: pointer;
    display: flex;
    align-items: center;
    font-size: 0.4rem;
    color: #0C0C0B;
    position: relative;
}

.change-tab-active {
    color: #A87953;
}
.content-box{
    min-height: 70vh;
}
.video-icon, .problem-tab-icon {
    width: 0.32rem;
    height: 0.32rem;
    margin-right: 0.133333rem;
}

.video-icon {
    background: url("../../img/mobile/brand/icon_video_def.png") no-repeat;
    background-size: 100%;
    background-color: transparent;
}

.change-tab-active .video-icon {
    background: url("../../img/mobile/brand/icon_video_sel.png") no-repeat;
    background-size: 100%;
    background-color: transparent;
}

.problem-tab-icon {
    background: url("../../img/mobile/brand/icon_problem_def.png") no-repeat;
    background-size: 100%;
    background-color: transparent;
}

.change-tab-active .problem-tab-icon {
    background: url("../../img/mobile/brand/icon_problem_sel.png") no-repeat;
    background-size: 100%;
    background-color: transparent;
}

.change-tab-active::after {
    content: " ";
    width: 100%;
    height: 2px;
    position: absolute;
    bottom: -0.4rem;
    left: 0;
    background-color: #A87953;
}

.video-card {
    z-index: 10;
    position: relative;
    margin-bottom: 0.8rem;
    overflow: hidden;
}

.video-mp {
    width: 100%;
    height: 5.96rem;
    object-fit: cover;
}

.video-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5.96rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.8);
    cursor: pointer;
}

.paly-icon {
    width: 1.333333rem;
    height: 1.333333rem;
}

.video-name {
    padding-top: 0.266667rem;
    color: #0C0C0B;
    font-size: 0.426667rem;
}

/*----常见问题-----*/

.common-problem {
    padding-top: 0.386667rem;
}

.problem-box {
    position: relative;
    padding: 0.8rem 0.4rem 0.533333rem;
    border: 1px solid #DDDDDD;
    margin-bottom: 60px;
}

.icon-img {
    z-index: 10;
    width: 0.773333rem;
    height: 0.773333rem;
    border-radius: 50%;
    border: 1px solid #DDDDDD;
    background: url('../../img/mobile/icon_problem_def.png') no-repeat;
    background-color: #fff;
    background-size: 0.4rem 0.4rem;
    background-position: center;
    position: absolute;
    top: -0.386667rem;
    left: 0.4rem;
    transition: all 0.5s;
}

.problem-active .icon-img {
    background: url('../../img/mobile/icon_problem_sel.png') no-repeat;
    background-size: 0.4rem;
    background-position: center;
    background-color: #0C0C0B;
}

.question-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.question-text {
    font-size: 0.373333rem;
    color: #0C0C0B;
    line-height: 0.56rem;
}

.question-arrw {
    width: 0.4rem;
    height: 0.4rem;
    background: url('../../img/mobile/icon_unfold_def.png') no-repeat;
    background-size: 0.106667rem 0.186667rem;
    background-position: center;
    transition: all 0.5s;
}

.problem-active .question-arrw {
    transform: rotate(90deg);
}

.problem-icon {
    font-family: "DINAlternate-Bold", "DINAlternate";
    font-weight: bold;
    color: #0C0C0B;
    flex-shrink: 0;
}

.answer-box {
    display: none;
}

.answer-text {
    margin-top: 0.4rem;
    font-size: 0.373333rem;
    font-family: SourceHanSansCN-Light, SourceHanSansCN;
    font-weight: 300;
    color: #0C0C0B;
    line-height: 0.533333rem;
    letter-spacing: 1px;
    text-align: justify;
    display: flex;
    align-items: flex-start;
}

.file-list {
    margin-left: 0.133333rem;
    display: flex;
    flex-direction: column;
}

.file-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    margin: 0.133333rem 0;
}

.pdf-icon {
    width: 0.186667rem; /* 14px */
    height: 0.186667rem; /* 14px */
    margin-right: 0.066667rem; /* 5px */
}

.file-name {
    margin-left: 0.066667rem; /* 5px */
}

pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-all;
    overflow: hidden;
    padding-top: 0;
}