/* カスタマイズ用CSS */
.heading-31 {
    position: relative;
    padding: .3em 0 .2em 1em;
    border-bottom: 3px solid #16ac02;
    color: #333333;
}

.heading-31::before {
    position: absolute;
    top: 0;
    left: .3em;
    transform: rotate(55deg);
    height: 11px;
    width: 12px;
    background: #16ac02;
    content: '';
}

.heading-31::after {
    position: absolute;
    transform: rotate(15deg);
    top: .6em;
    left: 0;
    height: 8px;
    width: 8px;
    background: #16ac02;
    content: '';
}



body {
  margin: 0;
  padding: 20px;
}

.box {
  display:flex;
  flex-direction: row;
  justify-content: space-between;
  margin-bottom: 40px;
}

.text {
}

h3 {
  font-size: 21px;
  margin: 0;
}

.pict {
  width: 70%;
  margin-left: 3%;
    margin-right: 3%;
}

.pict img {
  width: 100%;
  height:auto;
}

.box:nth-child(even) {
  flex-direction: row-reverse;
}
.box:nth-child(even) .text {
  text-align: right;
}
.box:nth-child(even) .pict {
  margin-left: 0;
  margin-right: 3%;
}

@media (max-width:768px) {
  .box {
    flex-direction: column;
  }
  .box:nth-child(even) {
    flex-direction: column;
  }
  .text {
    text-align: left;
  }
  .box:nth-child(even) .text {
    text-align: left;
  }
  .pict {
    width:100%;
    margin-left: 0;
    text-align: left;
  }
  .box:nth-child(even) .pict {
    margin-left: 0;
    margin-right: 0%;
  }
  .pict img {
    width:90%;
    height:auto;
  }
}