div之间的小差距

.video-section-wrapper {
        width: 100%;
        height: 300px;
        BACkground-color: whitesmoke;
        position: absolute;
        top: 180px;
        border-radius: 4px;
        border-top: orange 5px solid;
        border-bottom: orange 5px solid;
        box-sizing: border-box;
        display: flex;
        justify-content: space-around;
        align-items: center;
    }

    .video-section-box {
        height: 90%;
        width: 27%;
        border: solid black 5px;
        box-sizing: border-box;
        box-shadow: 1px 1px 2px 2px rgba(0,0.5),-1px -1px 2px 2px rgba(0,0.5);
        transition: ease-in-out 0.5s;
        overflow: hidden;
    }

    .video-section-box:hover {
        height: 93%;
        width: 30%;
    }

    .video-section-box > .video {
        width: 100%;
    }

    .video-section-box > .video > iframe {
        width: inherit;
        box-sizing: content-box;
        border: none;
        height: 100%;
    }

    .video-section-box > .subtitle-wrapper {
        border-top: rgba(0,0.5) solid 5px;
        height: 92px;
        width: 100%;
        position: relative;
    }

    .video-section-box > .subtitle-wrapper > .subtitle-header {
        padding-left: 5px;
        BACkground-color: white;
        box-sizing: border-box;
        padding-bottom: 0px;
        margin-bottom: -1px;
        border-bottom: 0px;
    }

    .video-section-box > .subtitle-wrapper > .subtitle-header > h {
        BACkground-color: black;
        color: wheat;
        font-weight: bold;
        BACkground-size: 300px 300px;
        border-top-left-radius: 4px;
        border-top-right-radius: 4px;
        padding-left: 30px;
        padding-right: 30px;
    }

    .video-section-box > .subtitle-wrapper > .subtitle-content {
        BACkground-color: black;
        margin: 0px;
        outline: 0px;
        height: 84px;
        color: wheat;
        display: flex;
        align-items: center;
        justify-content: center;
        box-sizing: border-box;
    }

    .capo-wrap {
        font-size: 17px;
        position: absolute;
        color: wheat;
        display: flex;
        align-items: flex-end;
        height: 78px;
    }

    .capo-wrap > p{
        margin: 0px;
    }

    .video-section-box > .subtitle-wrapper > .subtitle-content > .p {
        margin: 0px;
        padding-top: 0px;
        justify-content: center;
        align-items: center;
        text-align: center;
        font-weight: bolder;
        font-size: 30px;
        display: inline-block;
    }

 <div class="video-section-box">
      <div class="video">
          <iframe>

          </iframe>
      </div>

      <div class="subtitle-wrapper">
          <div class="subtitle-header">
              <h>TUNING</h>                    
          </div>

          <div class="capo-wrap"><p>Capo Fret :</p></div>

          <div class="subtitle-content">
              <div class="p">E A D G B E</div>
          </div>                    
      </div>
   </div>