.page{
  max-width: 600px;
  margin:0px auto;
}
.system-name{
  text-align: center;
  font-size: 34px;
  color: #3cc51f;
  font-weight: 400;
  margin: 0 15%;
}
.system-sub-name{
  text-align: center;
  color: #888;
  font-size: 14px;
}

.header {
    padding: 35px 0;
}

.weui-footer {
    margin: 25px 0 10px 0;
}

.second-title{
  text-align: center;
  font-size: 24px;
  color: #3cc51f;
  font-weight: 400;
  margin: 0 15%;
}

.sub-title{
  text-align: center;
  color: #888;
  font-size: 14px;
  
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(51, 51, 51, 0.7);
    color: white;
    height: 50px;
    padding: 0 5px;
    position: fixed;
    top: 0;
    width: 100%;
    box-sizing: border-box;
    z-index: 1000;
}
.navbar button {
    background: none;
    border: none;
    color: white;
    padding: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
}
.navbar .title {
    font-size: 18px;
    font-weight: bold;
}
.navbar svg {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: white;
    stroke-width: 2;
}

#qrCode{
    text-align: center;
    width: 200px;
    height: 200px;
    margin: 30px auto 0px;
    border: 1px solid #ccc;
}
@media (max-width: 600px) {
    .navbar {
        height: 44px;
    }
    .navbar .title {
        font-size: 16px;
    }
    .navbar svg {
        width: 20px;
        height: 20px;
    }
}