/* =======================================================
* sub_main
* ======================================================= */
#sub_main {
  background: url(../images/bg-about.jpg) no-repeat center bottom 20%/cover;
}

/* =======================================================
* merit
* ======================================================= */
.white_gray {
  background: linear-gradient(0deg, rgb(227 227 227 / 30%) 0%, rgb(255, 255, 255, 1) 70%);
}

#merit ul {
  display: grid;
  gap: 50px 30px;
  grid-template-columns: 1fr 1fr 1fr;
}

#merit ul li {
  font-size: 1.4rem;
  z-index: 1;
}

@media screen and (max-width:900px) {
  #merit .merit_touch img {
    width: 20px;
    margin-right: 5px;
  }

  #merit ul {
    display: flex;
    overflow-x: scroll;
    padding-bottom: 30px;
    margin-top: 20px;
    gap: 0;
  }

  #merit ul li {
    min-width: 77%;
    margin: 0 15px;
  }

  #merit ul li h3 {
    font-size: 1.7rem;
  }
}


/* =======================================================
* ion
* ======================================================= */
#ion .ionBlock {
  width: 48%;
  border: 1px solid #d4d4d4;
  box-shadow: 1px 1px 9px rgba(0, 0, 0, 0.1);
  background: var(--color-white);
  padding: 40px;
  border-radius: 10px;
  font-size: 1.5rem;
  margin-top: 20px;
}

#ion .ionBlock img {
  width: 70%;
  margin: 0 auto 15px;
}

#ion .ion_catch {
  text-align: center;
  font-size: 2rem;
  letter-spacing: .15em;
  margin-top: 16rem;
  position: relative;
}

#ion .ion_catch::after {
  position: absolute;
  content: "";
  width: 350px;
  height: 350px;
  border: 1px solid #ddd;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
}

@media screen and (max-width:900px) {
  #ion .ionBlock {
    width: 100%;
    padding: 30px 20px;
  }

  #ion .ion_catch {
    font-size: 1.8rem;
    margin-top: 13rem;
  }
}

/* =======================================================
* effect
* ======================================================= */
#effect {
  background: linear-gradient(0deg, rgba(255, 255, 255, 1) 30%, rgb(227 227 227 / 30%) 100%);
}

#effect .flex {
  margin: 50px 0;
}

#effect .flex div:first-child strong {
  font-size: 2.5rem;
}

#effect video {
  width: 100%;
}

#effect .arrow_down {
  position: absolute;
  bottom: -180px;
  left: 40%;
  width: 70px;
  transform: rotate(-15deg);
}

#effect .linkBtn {
  margin-top: 100px;
}

@media screen and (max-width:900px) {
  #effect .arrow_down {
    position: static;
    width: 40px;
    margin: -30px auto;
  }
}