#cases .logo-animation-box {
  position: relative;
  height: auto;
  overflow: hidden;
}

#cases .logo-animation-box > .title {
  z-index: 9;
  position: absolute;
  top: 50%;
  left: 50%;
  /* opacity: 1; */
  padding-top: 40px;
  transform: translateX(-50%);

  transition: all 3s;
}

#cases .logo-animation-box > .logo-box {
  z-index: 2;
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: url('../assets/cases_logo.png');
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

/* logo 动画效果 */
/* #cases .logo-animation-box.to-big > .title {
  opacity: 0;
} */
#cases .logo-animation-box > .title {
  animation: showCasesTitle 2s linear 2s both;
}

#cases .logo-animation-box.to-big > .title {
  animation: hideCasesTitle .5s linear both;
}

#cases .logo-animation-box > .logo-box {
  animation: hideCasesLogo 2s linear both;
}

#cases .logo-animation-box.to-big > .logo-box {
  animation: showCasesLogo 2s linear both;
}

@keyframes showCasesTitle {
  0% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}

@keyframes hideCasesTitle {
  100% {
    opacity: 0;
  }

  0% {
    opacity: 1;
  }
}

@keyframes showCasesLogo {
  0% {
    left: 0;
    bottom: 0;
  }

  /* 25% {
    left: -15%;
    bottom: -30%;
    transform: scale(5);
  }
  50% {
    left: -48%;
    bottom: -60%;
    transform: scale(10);
  }
  75% {
    left: -77%;
    bottom: -122%;
    transform: scale(15);
  } */
  100% {
    left: -105%;
    bottom: -160%;
    transform: scale(20);
    opacity: 0;
  }
}

@keyframes hideCasesLogo {
  100% {
    left: 0;
    bottom: 0;
  }

  /* 75% {
    left: -15%;
    bottom: -30%;
    transform: scale(5);
  }
  50% {
    left: -30%;
    bottom: -60%;
    transform: scale(10);
  }
  25% {
    left: -60%;
    bottom: -120%;
    transform: scale(15);
  } */
  0% {
    left: -120%;
    bottom: -240%;
    transform: scale(25);
  }
}


#cases .mask-bg {
  width: 100%;
  position: relative;
  /* position: absolute;
  top: 0;
  width: 100%;
  height: 100%; */
  /* height: calc(100vh - 56px); */

  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  transition: all 2s;
}

#cases .mask-bg .bg-img{
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
}

.mask-box {
  position: absolute;
}

.mask-box-1 {
  right: 182px;
  top: 140px;
  /* opacity: 0; */
}
/* 
#cases .logo-animation-box.to-big .mask-box-1 {
  opacity: 1;
} */

.mask-box-2 {
  left: 182px;
  top: 140px;
}

.mask-box-3 {
  left: 182px;
  top: 140px;
}

.mask-box-4 {
  right: 182px;
  top: 400px;
}

.mask-blue-box {
  width: 135px;
  height: 107px;
  background: #0071F5;
  position: absolute;
  right: -24px;
  top: -86px;
  transition: all 1.2s;
  transform: scale(0);
  z-index: 2;
}

.mask-blue-box-img {
  width: 0;
  height: 0;
  transition: all 1.2s;
  opacity: 0;
}

.case2-img>img {
  height: 31px !important;
}


.mask-desc-box {
  font-size: 1.5rem;
  color: #FFFFFF;
  overflow: hidden;
}

.box-title-mask{
  width: 457px;
  padding: 32px 20px 20px 20px;
  box-sizing: border-box;
  background: rgba(0, 0, 0, .25);
  transform: translateY(105%);
  will-change: transform;
  transition: transform 1.2s cubic-bezier(0.52, 0.01, 0, 1) 0s;
}

.box-title-mask.show{
  transform: translateY(0);
}

.mask-blue-box.show{
  transform: scale(1);
}

.mask-blue-box-img.show{
  width: 86px;
  height: 66px;
  opacity: 1;

}