.header {
  height: 600px;
  background-color: cornflowerblue;
}
.header .content {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 900px;
  height: 300px;
  margin: 0 auto;
}
.header .content .content-title {
  color: #fff;
  font-size: 44px;
  line-height: 80px;
  text-align: center;
  padding-top: 50px;
}
.header .content .search {
  margin-top: 20px;
  display: flex;
}
.header .content .search input {
  width: 408px;
  height: 18px;
  padding: 19px 15px;
  line-height: 18px;
  color: #495056;
  font-size: 18px;
  outline: none;
  border: none;
  background: #fff;
}
.header .content .search .button {
  margin-right: 10px;
  width: 148px;
  height: 56px;
  border: none;
  font-size: 20px;
  font-family: "microsoft yahei";
  color: #fff;
  line-height: 56px;
  text-align: center;
  background-color: #22ac38;
}

.header .content .buy {
  margin-top: 30px;
  color: #fff;
  font-size: 22px;
}
.card {
  padding-top: 50px;
  width: 1200px;
  margin: 0 auto;
  height: 450px;
  background-color: #fff;
  border-radius: 5px;
  transform: translateY(-300px);
}
.card .card-title {
  font-size: 32px;
  color: #22ac38;
  line-height: 48px;
  text-align: center;
}
.card-flex {
  display: flex;
  margin-top: 30px;
  justify-content: space-around;
}
.card-flex .flex-card {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.card-flex .flex-card .img {
  width: 150px;
  height: 150px;
}
.card-flex .flex-card div {
  color: #666;
}
.card-flex .flex-card .flex-card-title {
  font-size: 20px;
  color: #373b3f;
  line-height: 38px;
  text-align: center;
  padding-bottom: 5px;
}
.card .button {
  width: 168px;
  height: 40px;
  margin: 15px auto 50px;
  text-align: center;
  line-height: 40px;
  background: #22ac38;
  font-size: 16px;
  color: #fff;
}
.question {
  height: 435px;
  background-color: #f8f8f8;
}
.question .question-title {
  margin-top: 20px;
  font-size: 24px;
  color: #495056;
  line-height: 44px;
  text-align: center;
}
.question .question-flex {
  padding: 50px 100px;
  display: flex;
}
.question-flex .left {
  width: 50%;
}
.question-flex .right {
  width: 50%;
}
.question-flex .left-question {
  width: 200px;
  line-height: 36px;
  padding: 0 15px;
  background: #ebebeb;
  border-radius: 3px;
  font-size: 16px;
  color: #495056;
}

.question-flex .answer {
  font-size: 14px;
  color: #a5abb2;
  padding-top: 10px;
  line-height: 30px;
}