ul.app {
  display: flex;
  justify-content: space-between;
}

ul.app li {
  width: 577px;
}

ul.app li:nth-child(1) {
  width: 560px;
}

ul.app p {
  width: 100%;
}

ul.app img {
  margin-top: 70px;
}

.images {
  width: 1200px;
  height: 500px;
  margin: 75px auto 90px;
  position: relative;
}

.images .left {
  width: 520px;
  height: 100%;
}

.images .right {
  width: 680px;
  height: 100%;
  position: absolute;
  right: 0px;
  top: 0px;
  background-color: #eee;
  display: flex;
  flex-wrap: wrap;
  align-content: space-between;
  justify-content: space-between;
}

.images .right li {
  width: 340px;
  height: 250px;
}

.images .right li:nth-child(1) {
  background-color: #ff7b15;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.images .right li:nth-child(1) span {
  padding: 0;
  font-size: 45px;
  font-weight: bold;
  position: relative;
  color: #fff;
}

.images .right li:nth-child(1) span::before {
  content: "";
  width: 40px;
  height: 6px;
  display: block;
  background-color: #fff;
  position: absolute;
  left: 70%;
  top: -20px;
  margin-left: -40px;
}

.images .right li:nth-child(4) {
  position: relative;
}

.images .right li:nth-child(4) .zz {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  top: 0px;
  left: 0px;
  cursor: pointer;
}

.images .right li:nth-child(4) .zz button {
  width: 155px;
  height: 65px;
  border: 1px solid #fff;
  background: none;
  font-size: 28px;
  color: #fff;
}

.images .right li:nth-child(4) .zz button:focus {
  outline: none;
}

.images .more {
  left: 0px;
  top: 500px;
  width: 1200px;
  height: 250px;
  display: flex;
  justify-content: center;
}

.images .nf {
  display: none;
  width: 1200px;
  height: 250px;
}