:root {
  --swiper-navigation-color: #fff;
  --swiper-theme-color: #fff;
  --swiper-pagination-bullet-inactive-color: #000;
  --swiper-pagination-bullet-inactive-opacity: .5;
  --swiper-navigation-size: 20px;
}

:root {
  --swiper-navigation-color: #fff;
  --swiper-theme-color: #fff;
  --swiper-pagination-bullet-inactive-color: #000;
  --swiper-pagination-bullet-inactive-opacity: .5;
  --swiper-navigation-size: 20px;
}

.max-w {
  max-width: 768px;
  margin: 0 auto;
  padding: 12vmin 0;
}

.w {
  width: 95%;
  margin: 0 auto;
}

.jg-gray {
  height: 2.6666666667vmin;
  background-color: #f0f0f0;
  margin: 5.3333333333vmin 0;
}

.top {
  height: 2.5em;
  font-size: 4.2666666667vmin;
  line-height: 2.5em;
  -webkit-box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
          box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  color: #0a0a0a;
  text-align: center;
  font-weight: 500;
}
.top .w {
  position: relative;
  font-size: 4.8vmin;
  height: 100%;
}
.top .back {
  position: absolute;
  left: 0;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  font-size: 4.2666666667vmin;
}
.top .ra {
  position: absolute;
  right: 0;
  top: 50%;
  -webkit-transform: translateY(-50%);
          transform: translateY(-50%);
  font-size: 5.3333333333vmin;
}

.header {
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  background-color: #fff;
}
.header .w {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  height: 12vmin;
}
.header .header-logo {
  height: 8vmin;
}
.header .header-logo img {
  height: 100%;
}

.footer {
  position: fixed;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  left: 0;
  bottom: 0;
  width: 100%;
  z-index: 9999;
  height: 12vmin;
  background-color: #fff;
  text-align: center;
  color: #9d9d9d;
}
.footer span {
  font-size: 4.8vmin;
}
.footer p {
  font-size: 12px;
}
.footer .on {
  color: #f34336;
}