.p21c1{
    /* 边框 */
    left: 10%;
    width: 80%;
    top:13%;
    height: 75%;
    opacity: 1;
    border-style:solid;
    border-width:3px;
    color:#191970;
    border-radius:25px;
    position: absolute;/*设为绝对定位*/


}
.p21c2 {
    left: 30%;
    top: 33%;
    font-family: "Noto Sans";
    font-size: 40px;
    font-weight: 900;
    line-height: 120px;
    display: flex;
    align-items: center;
    letter-spacing: 0em;
    font-variation-settings: "opsz" 0.5;
    font-feature-settings: "kern" on;
    background: linear-gradient(180deg, rgba(212, 212, 217) 0%, rgba(255, 255, 255, 0) 50%), linear-gradient(99deg, #FCFCFC 2%, rgba(27, 30, 109) 86%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-fill-color: transparent;
    position: absolute;/*设为绝对定位*/
    animation-duration: 3s;
  animation-name: slidein;
  animation-iteration-count: 1;
    z-index: 1;

}

@keyframes slidein {
  from {
    margin-left: 100%;
    width: 0%;
  }

  to {
    margin-left: 0%;
    width: 100%;
  }
}

.p21c3 {
    left: 45%;
    top: 54%;
    width: 617px;
    height: 137px;
    opacity: 1;
    font-family: Noto Sans;
    font-size: 15px;
    font-weight: normal;
    line-height: 36px;
    display: flex;
    letter-spacing: 0em;
    font-variation-settings: "opsz" 0.7;
    font-feature-settings: "kern" on;
    color: #FFFFFF;
    position: absolute;/*设为绝对定位*/
    z-index: 1;

}

.p21c4{
    position: absolute;/*设为绝对定位*/
    left:40%;
    width:500px;
    top:38%;
    height:40%;
}