.qs-quiz-video {
    position: relative;
    width: 24rem;
    height: 13.5rem;
    max-width: 100%;
    cursor: pointer;
    margin: 8px 0;
}

.qs-quiz-video video {
    max-width: 100%;
    max-height: 100%;
    border-radius: 4px;
}

.qs-quiz-video-mask, .qs-quiz-video, .qs-quiz-video-preview {
    display: flex;
    align-items: center;
    justify-content: center;
}

.qs-quiz-video-mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .35);
    border-radius: 4px;
}

.qs-quiz-video-play {
    width: 80px;
    height: 80px;
    background: no-repeat center/contain url("/local-res-s3/qingshuxuetang.com/v10_7/icon/white-start.png");
}

.qs-quiz-video-preview {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .2);
    z-index: 1100;
}
.qs-quiz-video-preview-box {
    width: 842px;
    height: 554px;
}
.qs-quiz-video-preview-close-btn {
    position: absolute;
    width: 32px;
    height: 32px;
    top: 8%;
    right: 21%;
    z-index: 10;
    background-image: url("/local-res-s3/qingshuxuetang.com/v10_7/icon/close.png");
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}
.qs-quiz-video-preview:hover .qs-quiz-video-preview-close-btn {
    opacity: 1;
}

.qs-web-fullscreen {
    order: 9;
    width: 1.714285714em;
    height: 1.714285714em;
    margin-right: 2.285714286em;
    margin-bottom: 0.35714em;
    position: relative;
    cursor: pointer;
}

.qs-web-fullscreen:hover .qs-web-fullscreen-tip {
    display: block;
}

.qs-web-fullscreen-tip {
    display: none;
    text-align: center;
    width: 12em;
    font-size: 0.857142857em;
    line-height: 1.416666667em;
    padding: 0.333333333em 0.666666667em;
    border-radius: 0.142857143em;
    position: absolute;
    top: -2.416666667em;
    transform: translateX(calc(-50% + 1em));
    z-index: 6;
}
.qs-web-fullscreen-icon {
    width: 1.714285714em;
    height: 1.714285714em;
    background-size: 100% 100%;
}
.qs-web-fullscreen-icon:hover {
    opacity: 0.8;
}
.qs-web-fullscreen-icon-open {
    background-image: url("/local-res-s3/qingshuxuetang.com/v10_7/icon/web-full-screen-open.png");
}
.qs-web-fullscreen-icon-close {
    background-image: url("/local-res-s3/qingshuxuetang.com/v10_7/icon/web-full-screen-close.png");
}
.qs-web-fullscreen-active {
    position: fixed !important;
    width: 100%;
    height: 100%;
    bottom: 0 !important;
    right: 0 !important;
    z-index: 100;
}
.vjs-fluid {
    padding-top: 0 !important;
}
.qs-playback-rate, .qs-volume {
    height: 2em !important;
}
.qs-playback-rate-list, .qs-volume-slider {
    position: absolute;
    bottom: 2em;
}