.ctn1 {
  position: relative;
  overflow: hidden;
}
.ctn1 .ctn-list ul {
  display: flex;
  flex-wrap: wrap;
}
.ctn1 .ctn-list ul li {
  width: 30%;
}
.ctn1 .ctn-list ul li h2 {
  color: #222;
  -webkit-line-clamp: 3;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  text-overflow: ellipsis;
  overflow: hidden;
  line-height: 1.5;
  height: 4.5em;
  line-height: 1.25;
  height: 3.75em;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn1 .ctn-list ul li h3 {
  color: #999;
  margin-top: 6px;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn1 .ctn-list ul li p {
  color: #777;
  -webkit-line-clamp: 3;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  text-overflow: ellipsis;
  overflow: hidden;
  line-height: 1.5;
  height: 4.5em;
  line-height: 1.6;
  height: 4.8em;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn1 .ctn-list ul li .sign {
  width: 24px;
  height: 24px;
  position: relative;
  overflow: hidden;
}
.ctn1 .ctn-list ul li .sign span {
  position: absolute;
  left: 0;
  top: 0;
  color: #999;
  font-size: 24px;
  line-height: 1;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn1 .ctn-list ul li .sign span:last-child {
  left: -24px;
  top: 24px;
}
.ctn1 .ctn-list ul li:hover h2 {
  color: var(--color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  /* ������ϸ */
  text-underline-offset: 1px;
}
.ctn1 .ctn-list ul li:hover h3 {
  color: var(--color);
}
.ctn1 .ctn-list ul li:hover p {
  color: #222;
}
.ctn1 .ctn-list ul li:hover .sign span {
  color: var(--color);
}
.ctn1 .ctn-list ul li:hover .sign span:first-child {
  top: -24px;
  left: 24px;
}
.ctn1 .ctn-list ul li:hover .sign span:last-child {
  left: 0;
  top: 0;
}
.ctn1 .ctn-list ul li:not(:nth-child(3n)) {
  margin-right: 5%;
}
.ctn1 .ctn-list ul li:nth-child(n+4) {
  margin-top: 90px;
}
@media screen and (max-width: 1600px) {
  .ctn1 .ctn-list ul li .sign {
    width: 20px;
    height: 20px;
  }
  .ctn1 .ctn-list ul li .sign span {
    font-size: 20px;
  }
  .ctn1 .ctn-list ul li:nth-child(n+4) {
    margin-top: 4.5vw;
  }
}
@media screen and (max-width: 1200px) {
  .ctn1 .ctn-list ul li:nth-child(n+4) {
    margin-top: 5.5vw;
  }
}
@media screen and (max-width: 768px) {
  .ctn1 .ctn-list ul li {
    width: 100%;
    margin-right: 0!important;
  }
  .ctn1 .ctn-list ul li .sign {
    margin-top: 30px;
  }
  .ctn1 .ctn-list ul li:not(:first-child) {
    margin-top: 12vw;
  }
}