html, body {
    background-color: #fff;
}
ul, li {
    list-style: none;
}
a {
  text-decoration: none;
  color: #666;
  margin: 0;
}
 
.developer-center .docs-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background-color: #177CFF;
    display: flex;
    align-items: center;
    z-index: 20;
  }
  .developer-center .docs-header .logo {
    margin-left: 10px;
    width: 100px;
    height: 24px;
    margin-top: 4px;
  }
  .developer-center .docs-header .right-menu {
    position: absolute;
    right: 140px;
  }
  .developer-center .docs-header .right-menu >a {
    color: #fff;
    padding: 14px 16px;
    display: inline-block;
    margin-left: -5px;
    font-weight: 600;
  }
  .developer-center .docs-header .right-menu >a:nth-child(1) {
    padding-right: 16px;
  }
  .developer-center .docs-header .right-menu >a.selected {
    border-bottom: 2px solid #fff;
  }
  .developer-center .docs-header .right-menu >a:hover {
    border-bottom: 2px solid #fff;
  }
  .developer-center .docs-header .login {
    display: none;
    position: absolute;
    top: 9px;
    right: 20px;
    color: #1795FF;
    width: 110px;
    height: 30px;
    line-height: 29px;
    background: #fff;
    border-radius: 15px;
    text-align: center;
    font-family: PingFangSC, PingFangSC-Regular;
    font-weight: 600;
  }
  .developer-center .docs-header .login-quit {
    display: none;
    position: absolute;
    top: -3px;
    right: 20px;
    width: 106px;
    height: 30px;
    border-radius: 6px;
    margin-top: 14px;
    cursor: pointer;
    transition: height 0.2s;
    overflow: hidden;
    background: rgba(255,255,255,0.8);
    display: none;
  }
  .developer-center .docs-header .login-quit >p {
    margin: 0;
    line-height: 30px;
    font-size: 14px;
    font-family: SourceHanSansCN-Medium;
    text-align: left;
    padding-left: 13px;
  }
  .developer-center .docs-header .login-quit a {
    margin: 0 6px 0 6px;
  }
  .developer-center .docs-header .login-quit a:hover {
    color: #1795FF;
  }
  .developer-center .docs-header .login-quit .quit:hover {
    color: #f00 !important;
  }
  .developer-center .docs-header .login-quit .login-quit-arrow {
    display: inline-block;
    position: absolute;
    width: 20px;
    height: 20px;
    background: url('./Artboard2.png') no-repeat;
    background-size: 100% 100%;
    top: 4px;
  }
  .developer-center .docs-header .login-quit:hover {
    height: 68px;
    box-shadow: 0px 10px 20px 0px rgba(0,0,0,0.1);
  }
  .developer-center .docs-header .login-quit:hover .login-quit-arrow {
    transform: rotate(180deg);
  }
  .developer-center .docs-header .icon-separator {
    display: inline-block;
    height: 28px;
    border-right: 1px solid #EEE;
    margin-left: 20px;
    margin-top: 0px;
  }
  .developer-center .docs-header .header-title {
    margin-left: 20px;
    font-size: 16px;
    font-family: PingFangSC, PingFangSC-Regular;
    font-weight: 600;
    color: #ffffff;
  }
  .developer-center .docs-body {
    width: 1200px;
    margin: 0 auto;
    margin-top: 75px;
    margin-bottom: 100px;
  }
  .developer-center .docs-body .download-title {
    margin-top: 36px;
    font-size: 28px;
    font-family: PingFangSC, PingFangSC-Semibold;
    font-weight: 600;
    color: #333333;
  }
  .developer-center .docs-body .download-body {
    width: 1130px;
    padding: 40px 35px 30px;
    background: #f8f8fa;
    margin-top: 30px;
  }
  .developer-center .docs-body .download-body .body-title {
    font-size: 20px;
    font-family: PingFangSC, PingFangSC-Medium;
    font-weight: 500;
    color: #333333;
  }
  .developer-center .docs-body .download-body .body-title.next {
    margin-top: 20px;
  }
  .developer-center .docs-body .download-body .body-desc {
    width: 100%;
    font-size: 14px;
    font-family: PingFangSC, PingFangSC-Regular;
    font-weight: 400;
    color: #999999;
    margin-top: 10px;
  }
  .developer-center .docs-body .download-body .body-desc a {
    color: #1795ff;
  }
  .developer-center .docs-body .download-body .body-desc a:hover {
    text-decoration: underline;
  }
  .developer-center .docs-body .download-body .download-card {
    width: 100%;
    display: flex;
  }
  .developer-center .docs-body .download-body .download-card.code {
    margin-top: 10px;
  }
  .developer-center .docs-body .download-body .download-card .link + .link {
    margin-left: 15px;
  }
  .developer-center .docs-body .download-body .download-card .card {
    width: 270px;
    height: 54px;
    background: #ffffff;
    border: 1px solid #eeeeee;
    border-radius: 2px;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }
  .developer-center .docs-body .download-body .download-card.small .card {
    width: 211px;
  }
  .developer-center .docs-body .download-body .download-card .card:hover {
    border: 1px solid #1795FF;
    background: #1795FF;
    color: #fff;
    transition: all 0.3s;
  }
  .developer-center .docs-body .download-body .download-card .card:hover .icon {
    background-position-y: -24px;
  }
  .developer-center .docs-body .download-body .download-card .card .icon {
    display: inline-block;
    width: 24px;
    height: 24px;
    background: url('./brtc-download-icons@2x.png') no-repeat;
    background-position: 0 0;
    background-size: 144px 48px;
    margin-right: 10px;
  }
  .developer-center .docs-body .download-body .download-card .card .icon.ios {
    background-position-x: 0;
  }

  .developer-center .docs-body .download-body .download-card .card .icon.android {
    background-position-x: -24px;
  }
  .developer-center .docs-body .download-body .download-card .card .icon.web {
    background-position-x: -48px;
  }
  .developer-center .docs-body .download-body .download-card .card .icon.js {
    background-position-x: -72px;
  }
  .developer-center .docs-body .download-body .download-card .card .icon.windows {
    background-position-x: -96px;
  }
  .developer-center .docs-body .download-body .download-card .card .icon.harmonyos {
    background-position-x: -120px;
  }  
  .developer-center .docs-body .download-body .download-card .card .icon.mini-program {
    background-image: url('./icon-mini-program.png');
    background-size: cover;
  }
  .developer-center .docs-body .download-body .download-card .card:hover .icon.mini-program {
    background-image: url('./icon-mini-program-hover.png');
    background-position-y: 0;
  }
  .developer-center .docs-body .download-body .demo-download {
    width: 100%;
    margin-top: 20px;
    display: flex;
    align-items: start;
  }
  .developer-center .docs-body .download-body .demo-download .divider {
    height: 100px;
    border-left: 1px solid #d8d8d8;
    margin: 0 20px;
  }
  .developer-center .docs-body .download-body .demo-download .download-card.download {
    margin-top: 23px;
  }
  .developer-center .docs-body .download-body .download-card .link {
    position: relative;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .download-link {
    position: absolute;
    top: -98px;
    left: 219px;
    padding: 4px;
    background: #fff;
    border-radius: 4px;
    display: none;
    border: 1px solid #000;
    z-index: 3;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .download-link.mini-program {
    top: -154px;
    left: 42px;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .download-link::before {
    box-sizing: content-box;
    width: 0px;
    height: 0px;
    position: absolute;
    bottom: 13px;
    left: -20px;
    padding: 0;
    border-bottom: 10px solid transparent;
    border-top: 10px solid transparent;
    border-left: 10px solid transparent;
    border-right: 10px solid #000000;
    display: block;
    content: '';
    z-index: 9;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .download-link.mini-program::before {
    bottom: -20px;
    left: 58px;
    border-top: 10px solid #000000;
    border-right: 10px solid transparent;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .download-link::after {
    box-sizing: content-box;
    width: 0px;
    height: 0px;
    position: absolute;
    bottom: 14px;
    left: -18px;
    padding: 0;
    border-bottom: 9px solid transparent;
    border-top: 9px solid transparent;
    border-left: 9px solid transparent;
    border-right: 9px solid #FFFFFF;
    display: block;
    content: '';
    z-index: 10
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .download-link.mini-program::after {
    bottom: -18px;
    left: 59px;
    border-top: 9px solid #FFFFFF;
    border-right: 9px solid transparent;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .download-link img {
    width: 129px;
    height: 129px;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .dropdown-menu a {
    position: relative;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link .dropdown-menu a:hover .download-link {
    display: block;
  }
  .developer-center .docs-body .download-body .demo-download .download-card .link:hover .download-link.mini-program {
    display: block;
  }
  .developer-center .docs-body .download-body .demo-download .download-card.download .link + .link {
    margin-left: 16px;
  }
  .developer-center .docs-body .download-body .demo-download .download-card.download .card {
    width: 275px;
  }
  .developer-center .docs-body .download-body .demo-download .download-card.download .card .icon {
    margin-right: 18px;
  }
  .link .dropdown-menu {
    position: absolute;
    display: none;
    background-color: #fff;
  }

  .link:hover .dropdown-menu {
    display: inline-block;
    top: -134px;
  }

  .link:hover .dropdown-menu a {
    width: 170px;
    height: 44px;
    border: 1px solid #6b6868;
    border-radius: 2px;
    padding-left: 41px;
    display: flex;
    align-items: center;
    cursor: pointer;
  }
  .link:hover .dropdown-menu a + a {
    margin-top: -1px;
  }
  .link:hover .dropdown-menu a:hover {
    background: #1795FF;
    color: #fff;
  }

  .link .dropdown-menu2 {
    position: absolute;
    display: none;
    background-color: #ffffff;
  }

  .link:hover .dropdown-menu2 {
    display: inline-block;
    top: -179px;
  }

  .link:hover .dropdown-menu2 a {
    width: 170px;
    height: 44px;
    border: 1px solid #6b6868;
    border-radius: 2px;
    padding-left: 41px;
    display: flex;
    align-items: center;
    cursor: pointer;
  }
  .link:hover .dropdown-menu2 a + a {
    margin-top: -1px;
  }
  .link:hover .dropdown-menu2 a:hover {
    background: #1795FF;
    color: #fff;
  }

  .link .dropdown-menu3 {
    position: absolute;
    display: none;
    background-color: #ffffff;
  }

  .link:hover .dropdown-menu3 {
    display: inline-block;
    top: -86px;
  }

  .link:hover .dropdown-menu3 a {
    width: 170px;
    height: 44px;
    border: 1px solid #6b6868;
    border-radius: 2px;
    padding-left: 41px;
    display: flex;
    align-items: center;
    cursor: pointer;
  }
  .link:hover .dropdown-menu3 a + a {
    margin-top: -1px;
  }
  .link:hover .dropdown-menu3 a:hover {
    background: #1795FF;
    color: #fff;
  }