.p-sub-category {
  margin: 30px 10px;
  padding: 0;
  list-style-type: none;
}

.p-sub-category::after {
  display: block;
  clear: both;
  content: '';
}

.p-sub-category__item {
  float: left;
  box-sizing: border-box;
  width: 50%;
  padding: 10px 5px;
}

.p-sub-category__image {
  display: block;
  margin-bottom: 10px;
}

.p-sub-category__link {
  display: block;
  transition: opacity .2s;
  text-decoration: none;
  color: #333;
}

.p-sub-category__link:hover {
  opacity: .66;
}

.p-sub-category__link:active {
  opacity: 1;
}

.p-sub-category__name {
  line-height: 1.3;
  position: relative;
  display: block;
  padding-left: .8em;
}

.p-sub-category__name::before {
  position: absolute;
  top: 0;
  left: 0;
  content: '-';
}

@media screen and (min-width: 600px) {
  .p-sub-category {
    margin-right: 0;
    margin-left: 0;
  }

  .p-sub-category__item {
    width: 25%;
    padding: 15px 10px;
  }

  .p-sub-category__item:nth-child(4n + 1) {
    clear: both;
  }
}

@media screen and (max-width: 599px) {
  .p-sub-category__item:nth-child(2n + 1) {
    clear: both;
  }
}
  /*　追加CSS　*/
  /*以下class名link_buttonのデザイン*/
.link_button {
  font-weight: bold;/*太字に*/
  text-decoration: none;/*下線消す*/
  background: #A50530;/*背景を水色に*/
  color:white;/*文字を白に*/
  padding:5px 10px;/*内側の余白*/
  border-radius: 20px;/*角を丸くする*/
  font-family: 'Avenir','Arial';/*フォントをいい感じに*/
}
/*以下カーソルを当てたとき*/
.link_button:hover {
  background: silver;/*背景色をシルバーに*/
  text-decoration: none;/*下線を消す*/
}