@keyframes open-keyanime1{  /* アニメーションの動き */
  0% { 
    opacity:0; /* 完全に透明 */
 } 
  100% {
    opacity:1; /* 透明度無し、通常表示 */
  }
}

.animation {
  font-size:1.17rem;
  animation-name: open-keyanime1 ; 
  animation-duration: 5s; /* 5秒間で表示 */ 
  animation-fill-mode: both;  
  animation-iteration-count: 1; /* 1回実行させています */
}

section {
	position:relative;
}
@media screen and (max-width: 767px) {
  section {
    margin:0 auto;
  }
  section:first-child {
    margin:70px auto 0;
  }
}

.kisetsu-title {
  -webkit-writing-mode: vertical-rl;
  -ms-writing-mode: tb-rl;
  writing-mode: vertical-rl;
  text-align: justify;
  line-height: .5;
	color:#5cc0fa;
	font-size:2.7rem;
	letter-spacing: 7px;
	position:absolute;
	top:-4vh;
	right:0;
	z-index:1;
}
@media screen and (max-width: 767px) {
	.kisetsu-title  {
	writing-mode: horizontal-tb;
    position: static;
    font-size: 2rem;
    margin: 30px;
	text-align:center;
  }
}

.card_items {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  margin: 80px auto;

}
@media screen and (max-width: 767px) {
  .card_items {
    margin-top: 42px;
  }
}

.card_item {
  width: calc(33.3% - 16px);
  padding: 16px;
  border-radius: 4px;
    overflow:hidden;

}
@media screen and (min-width: 1200px) {
  .card_item:not(:nth-child(3n+1)) {
    margin-left: 24px;
  }
  .card_item:nth-child(n+4) {
    margin-top: 24px;
  }
}
@media screen and (max-width: 1199px) {
  .card_item {
    width: calc(50% - 12px);
  }
  .card_item:not(:nth-child(2n+1)) {
    margin-left: 24px;
  }
  .card_item:nth-child(n+3) {
    margin-top: 24px;
  }
}
@media screen and (max-width: 767px) {
  .card_item {
    width: 100%;
    margin: 0;
  }
  .card_item:nth-child(n+2) {
    margin: 15px auto;
  }
}

.card_img img {
  width: 100%;
    transition:1s all;
}
.card_img img:hover {
  transform:scale(1.2,1.2);
  transition:.5s all;
}

@media screen and (max-width: 767px) {
.card_img img {
  transition:none;
}
.card_img img:hover {
  transform: none;
  transition:none;
}
}


.card_title {
  font-size: 20px;
  font-weight: 700;
  color: #6F7579;
  margin-top: 14px;
  border-bottom: double 5px var(--light-purple);
}

.card_text {
  color: #6F7579;
  font-weight: 400;
  line-height: 1.5;
  margin-top: 14px;
}

@media screen and (max-width: 767px) {
.is-pc {
  display:none;
}
}
span {
	color:red;
}