.section-topicsbox .txtbox .ph-main {
  margin: 50px 0; }
.section-topicsbox .txtbox .ph-main {
  max-width: 763px;
  margin: 0 auto 50px; }
  .section-topicsbox .txtbox .ph-main img {
    width: 100%; }
.section-topicsbox .txtbox .mein-txt {
  line-height: 2.5; }
.section-topicsbox .txtbox .sp-none {
  display: block; }
  @media screen and (max-width: 640px) {
    .section-topicsbox .txtbox .sp-none {
      display: none; } }