.flexList {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  font-family: "Microsoft YaHei", "PingFang SC", "WenQuanYi Zen Hei", sans-serif;
  justify-content: space-between;
}

.listBox {
  width: 885px;
  display: flex;
  flex-direction: column;
  position: relative;
  margin: 0 auto 40px auto;
  border-image-slice:
12 12 12 12;
border-image-width:
12px 12px 12px 12px;
  border-image-outset: 0px 0px 0px 0px;
  border-image-repeat: round round;
  border-image-source: url("../img/main_border_2.png");
  border-style: solid;
}

.w50 > :first-child > :first-child {
  font-size: 26px;
  margin: 35px 0 15px 0;
  font-size: bold;
}

.flexList > :nth-child(2) > div :nth-child(2) {
  font-size: 18px;
  line-height: 24px;
}

.w40 {
  width: 270px;
  z-index: 2;
}

.w50 {
  width: 580px;
  margin-left: 5px;
  min-height: 90%;
  background-size: contain;
  background-repeat: no-repeat;
  display: flex;
  flex-direction: column;
  position: relative;
}

.list-right {
  width: 13px;
  margin-top: 37px;
  background-image: url("../img/index_border_right.png");
}

.list-top,
.list-bottom {
  width: 100%;
  height: 13px;
  background-image: url("../img/index_border.png");
  position: relative;
  background-position-x: -2px;
}

.list-top {
  top: 20px;
}

.list-bottom {
}

.w50 > div {
  margin-right: 30px;
}

#videoList {
  margin: 20px 0;
}

.in100 img {
  width: 100%;
  border-radius: 10px;
}

.in100 {
  display: flex;
  flex-direction: column;
  position: relative;
  top: -2px;
  left: -4px;
}

.in100 > :nth-child(2) {
  position: absolute;
  top: 0;
  left: 0;
}

.arrowBox {
  display: flex;
  justify-content: flex-end;
  color: #1dbca3;
  font-size: 16px;
  font-weight: bold;
  align-items: center;
  margin-bottom: 25px;
}

.arrowBox :first-child {
  margin-right: 5px;
}

.arrow-button {
  width: 20px;
  height: 20px;
  border: none;
  background-color: #29b6a8;
  border-radius: 50%;
  position: relative;
  cursor: pointer;
}

.arrow-button::before {
  content: "";
  position: absolute;
  left: 41%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(-45deg);
  width: 6px;
  height: 6px;
  border: solid white;
  border-width: 0 2px 2px 0;
}

.arrow-button:hover {
  background-color: #22a093;
}

.arrow-button:hover::before {
  left: 43%;
}

@media screen and (max-width: 480px) {
  .listBox {
    width: 90%;
    border-image-source: none;
    border-bottom: 1px solid #000;
    margin: 3vw auto;
  }
  .in100 {
    top: 0;
    left: 0;
    margin: 0 auto;
  }
  .w50 {
    width: 100%;
    margin-left: 0;
    padding: 0 3vw;
  }
  .w50 > div {
    margin-right: 0;
  }
  #videoList {
    margin: 0;
  }
}