.content-box {
    min-height: calc(100vh - 134px);
}

.change-tab-box {
    height: 102px;
    background: #FFFFFF;
    box-shadow: 0px 2px 10px 0px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.change-tab-item {
    margin: 0 88px;
    cursor: pointer;
    display: flex;
    align-items: center;
    font-size: 34px;
    color: #0C0C0B;
    position: relative;
}

.change-tab-active {
    color: #A87953;
}

.video-icon, .problem-tab-icon {
    width: 24px;
    height: 24px;
    margin-right: 10px;
}

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

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

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

.change-tab-active .problem-tab-icon {
    background: url("../../../assets/img/index/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: -20px;
    left: 0;
    background-color: #A87953;
}

.video-list{
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: space-between;
}
.video-card{
    width: 560px;
    height: 374px;
    position: relative;
    margin-bottom: 80px;
    overflow: hidden;
}
.video-mp{
    width: 100%;
    height: 100%;
    object-fit: cover;
   
}
.video-content{
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    transition: all 0.6s;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.8);
    cursor: pointer;
}
.paly-icon{
    width: 70px;
    height: 70px;
    margin-bottom: 20px;
    display: none;
}
.video-card:hover .video-content{
    height: 100%;
}
.video-card:hover .paly-icon{
    display: block;
}
/*----常见问题-----*/
.problem-box{
    position: relative;
    padding: 50px 30px 20px;
    border: 1px solid #DDDDDD;
    margin-bottom: 60px;
}
.icon-img{
    z-index: 10;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    border: 1px solid #DDDDDD;
    background: url('../../../assets/img/index/service/icon_problem_def.png') no-repeat;
    background-color: #fff;
    background-size: 30px 30px;
    background-position:center;
    position: absolute;
    top: -30px;
    left: 30px;
    transition: all 0.5s;
}
.problem-active .icon-img{
    background: url('../../../assets/img/index/service/icon_problem_sel.png') no-repeat;
    background-size: 30px 30px;
    background-position:center;
    background-color: #0C0C0B;
}
.question-box{
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 5px;
}
.question-text{
    font-size: 16px;
    font-family: "SourceHanSansCN-Regular", "SourceHanSansCN";
    font-weight: 400;
    color: #333333;
    line-height: 24px;
}
.question-arrw{
    width: 30px;
    height: 30px;
    background: url('../../../assets/img/index/service/icon_unfold_def.png') no-repeat;
    background-size: 8px 14px;
    background-position:center;
    transition: all 0.5s;
}
.problem-active .question-arrw{
    transform: rotate(90deg);
}
.problem-icon{
    font-size: 20px;
    font-family: "DINAlternate-Bold", "DINAlternate";
    font-weight: bold;
    color:#0C0C0B;
    flex-shrink: 0;
}
.answer-box{
    display: none;
}
.answer-text {
    font-size: 14px;
    font-weight: 300;
    color: #333333;
    line-height: 32px;
    letter-spacing: 1px;
    text-align: justify;
    display: flex;
    flex-direction: row; /* 改为行布局 */
    align-items: flex-start; /* 顶部对齐 */
}

.file-list {
    margin-top: 0; /* 移除顶部边距 */
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-left: 5px; /* 与problem-icon保持间距 */
}

.file-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    margin: 5px 0;
}

.pdf-icon {
    width: 14px;
    height: 14px;
    vertical-align: middle;
    margin-right: 5px;
}

.file-name {
    vertical-align: middle;
    margin-left: 5px;
}