.container {
  max-width: 1440px;
  margin: 0 auto;
  overflow: hidden;
}

.color-red {
  color: #e21537;
}

.color-white {
  color: #fff;
}

.flex {
  display: flex;
}

.flex-between {
  width: 100%;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.flex-start {
  width: 100%;
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.bg_f5 {
  background-color: #f5f5f5;
}

.white_bg {
  background-color: #fff;
}

.mask {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 9;
  display: none;
}