.flex-center {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
}
* {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: #333;
  background-color: #f5f5f5;
}
.app-container {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
}
.swiper-container {
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
}
.swiper-container .swiper-slide img {
  width: 100%;
  height: auto;
  -o-object-fit: cover;
     object-fit: cover;
}
.swiper-container .swiper-pagination {
  bottom: 8px;
  text-align: center;
  width: 100%;
}
.swiper-container .swiper-pagination .swiper-pagination-bullet {
  width: 8px;
  height: 8px;
  background: rgba(255, 255, 255, .5);
  margin: 0 4px;
  opacity: 1;
}
.swiper-container .swiper-pagination .swiper-pagination-bullet-active {
  width: 16px;
  height: 6px;
  border-radius: 3px;
  opacity: 1;
  background: #fff;
}
.app-info {
  padding: 20px;
}
.app-info .app-header {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  margin-bottom: 20px;
}
.app-info .app-header .app-logo {
  width: 120px;
  height: 120px;
  border-radius: 8px;
  margin-right: 15px;
}
.app-info .app-header .app-meta-download-container {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
      -ms-flex-direction: column;
          flex-direction: column;
}
.app-info .app-header .app-meta-download-container .app-meta {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
      -ms-flex: 1;
          flex: 1;
}
.app-info .app-header .app-meta-download-container .app-meta .app-title {
  font-size: 20px;
  margin-bottom: 5px;
  color: #222;
  font-weight: 600;
}
.app-info .app-header .app-meta-download-container .app-meta .app-desc {
  color: #999;
  font-size: 14px;
}
.app-info .app-header .app-meta-download-container .download-btn {
  width: 72px;
  height: 28px;
  background: #73ce63;
  color: white;
  border-radius: 14px;
  font-weight: bold;
  line-height: 28px;
  text-align: center;
}
.app-stats {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-justify-content: space-around;
      -ms-flex-pack: distribute;
          justify-content: space-around;
  border-bottom: 1px solid #eee;
  border-top: 1px solid #eee;
  width: 100%;
}
.app-stats .app-review {
  width: 100%;
  height: 80%;
}
.install-guide-ios {
  padding: 20px 0;
  margin-bottom: 20px;
}
.install-guide-ios .platform-title {
  font-size: 22px;
  margin-bottom: 8px;
  color: #222;
  font-weight: 600;
  text-align: center;
}
.install-guide-ios .platform-manual {
  font-size: 14px;
  color: #666;
  text-align: center;
  margin-bottom: 6px;
}
.install-guide-ios .step-pic-container {
  margin-bottom: 20px;
  padding: 15px;
  background: #f9f9f9;
  border-radius: 8px;
}
.install-guide-ios .step-pic-container .step-number {
  font-size: 24px;
  color: #4caf50;
  margin-bottom: 10px;
}
.install-guide-ios .step-pic-container img {
  width: 100%;
  border-radius: 8px;
}
.install-guide-android {
  padding: 20px 0;
  margin-bottom: 20px;
}
.install-guide-android .platform-title {
  font-size: 22px;
  margin-bottom: 8px;
  color: #222;
  font-weight: 600;
  text-align: center;
}
.install-guide-android .platform-manual {
  font-size: 14px;
  color: #666;
  text-align: center;
  margin-bottom: 6px;
}
.install-guide-android #tabs {
  height: 30px;
  margin: 25px 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.install-guide-android #tabs .tab {
  display: inline-block;
  margin: 0 10px;
  cursor: pointer;
}
.install-guide-android #tabs .active {
  color: #81d772;
  font-weight: bold;
  position: relative;
}
.install-guide-android #tabs .active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -10px;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  display: block;
  height: 2px;
  width: 8px;
  background: #81d772 !important;
}
.install-guide-android #contents {
  width: 100%;
}
.install-guide-android #contents .content {
  display: none;
}
.install-guide-android #contents .active {
  display: block;
}
.install-guide-android #contents img {
  width: 100%;
}
.install-guide-android .step-pic-container {
  margin-bottom: 20px;
  padding: 15px;
  background: #f9f9f9;
  border-radius: 8px;
}
.install-guide-android .step-pic-container .step-number {
  font-size: 24px;
  color: #4caf50;
  margin-bottom: 10px;
}
.install-guide-android .step-pic-container img {
  width: 100%;
  border-radius: 8px;
}
@media (max-width: 480px) {
  .app-header .app-logo {
    width: 50px;
    height: 50px;
  }
  .app-header h1 {
    font-size: 18px;
  }
}