html {
  /*定义一个颜色属性#165DFF*/
  --main-color: #165DFF;
  --main-color-2: #2a6afffd;
  color: #262a47;
}

.main-box{
  margin: 0 auto;
  width: 1200px;
}

@media (max-width: 1200px) {
  .main-box{
    width: 100%;
    overflow-x: hidden;
  }
}

.btn {
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 14px;
  line-height: 22px;
  user-select: none;
  cursor: pointer;
  text-align: center;
}

.btn:hover {
  background-color: #f2f2f2;
}

.btn:active {
  background-color: #eee;
}

.btn.main {
  background-color: var(--main-color);
  color: white;
  border: none;
}

.btn.main:hover {
  background-color: var(--main-color-2);
}

.btn.main:active {
  background-color: var(--main-color);
}

.btn.main2 {
  background-color: none;
  color: var(--main-color);
  border: 1px solid var(--main-color);
}

.btn.main2:hover {
  background-color: #f6f9ff22;

}

.btn.main2:active {
  background-color: #f6f9ff55;
}