main_con {
  display: flex;
  flex-wrap: nowrap;
}

#main_con .block1 {
  width: 70%;
  box-sizing: border-box;
}

#main_con .block2 {
  width: 30%;
  padding-left: 10px;
  box-sizing: border-box;
}

/* 手机端：竖排布局 */
@media screen and (max-width: 768px) {
  #main_con {
    display: block;
  }

  #main_con .block1,
  #main_con .block2 {
    width: 100%;
    padding-left: 0;
  }
}

/* 以下是你原本的代码，可保留 */
.icon-container {
  width: 100vw;
  background: #000;
  position: fixed;
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  z-index: 99999;
}

.icon-container li {
  width: 25%;
  box-sizing: border-box;
  padding: 1%;
  margin: 0;
}

.icon-container li:first-child {
  width: 75%;
}

.icon-container li:nth-child(2) {
  margin: 0;
}

.icon-container li img {
  width: 100%;
  height: auto;
  margin-bottom: 5px;
}

#op .sp.noop {
  display: none;
}

@media screen and (max-width: 768px) {
  #wrap #list li.list__item article {
    min-height: auto;
  }

  #reviewbox .tab li {
    font-size: 0;
  }

  #reviewbox .tab li i {
    font-size: 1rem;
  }

  #reviewbox .tab li:first-child i.fa-comment-dots::before {
    content: "\f4ad　REVIEW";
  }

  #reviewbox .tab li:nth-child(2) i.fa-pencil-square-o::before {
    content: "\f044　POST";
  }
}