@media only screen and (min-width: 275px){
    .dialog{
        position: fixed;
        background-color: rgba(0, 0, 0, 0.8); 
        top:0;
        left: 0;
        right: 0;
        width: 100%;
        height: 100%;
        z-index: 2;
        display: flex;
        justify-content: center;
        min-height: 300px;
        overflow: auto;
    }
    .dialog-reg {
        width: 100%;
        max-width: 340px;
        position: absolute; left: 0; top: 0; right: 0; bottom: 0;
        margin: auto;   
    }
    
    .topic {
        position: relative;
        display: flex;
        width: 100%;
        height: 35px;
        background-image: url("./register/bg_topic.png");
        background-position: center center;
        background-size: 100% 100%;
        align-items: center;
        justify-content: center;
    }
    .topic .title{
        height: 30px;
    }
    .topic .close {
        position: absolute;
        right: 10px;
        width: 20px;
    }
    
    .content {
        background-color: transparent;
        background-image: url("./register/bg_form.png");
        background-size: 100% 100%;
    }
    
    .layui-form {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding-top: 10px;
    }
    
    .input_box {
        display: flex;
        align-items: center;
        width: calc(100% - 30px);
        height: 50px;
        line-height: 50px;
        border: 1px solid #716daa;
        border-radius: 10px;
        color: #ead4aa;
        margin-bottom: 7px;
        /* Permalink - use to edit and share this gradient: https://colorzilla.com/gradient-editor/#2c356a+0,242a4e+100 */
        background: #2c356a;
        /* Old browsers */
        background: -moz-linear-gradient(top, #2c356a 0%, #242a4e 100%);
        /* FF3.6-15 */
        background: -webkit-linear-gradient(top, #2c356a 0%, #242a4e 100%);
        /* Chrome10-25,Safari5.1-6 */
        background: linear-gradient(to bottom, #2c356a 0%, #242a4e 100%);
        /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
        filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#2c356a', endColorstr='#242a4e', GradientType=0);
        /* IE6-9 */
    }
    
    .head_icon {
        width: 15px !important;
    }
    
    .input_box img {
        width:15px;
        margin-left: 10px;
    }
    
    input {
        width: 95%;
        margin-left: 5px;
        font-size: 14px;
        background-color: transparent;
        box-shadow: none;
        color: #ead4aa;
        border: none;
        outline: none;
        -webkit-appearance: none;
    }
    
    .group {
        width: calc(100% - 60px);
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    
    .group .input_box {
        width: 55%;
        margin-bottom: 0;
    }
    
    .group .get_auth_code {
        width: 43%;
        height: 40px;
    }
    
    .footer {
        padding: 0 10px;
        margin: 10px 0 10px 0;
    }
    
    .footer img {
        width: 47%;
    }
    .footer button {
        background-color: transparent;
        border: none;
        padding: 0;
        margin-top: 0px;
    }
    .click_download {
        text-align: center;
        font-size: 15px ;
        height: 40px;
        line-height: 40px;
        color: white;
    }
    .click_download span{
        color: #ead4aa;
    }
    ::placeholder {
        color: #ead4aa !important;
    }
    @media only screen and (min-width: 600px){
        .dialog{
            position: fixed;
            background-color: rgba(0, 0, 0, 0.8); 
            top:0;
            left: 0;
            right: 0;
            width: 100%;
            height: 100%;
            z-index: 2;
            display: flex;
            justify-content: center;
            min-height: 300px;
            overflow: auto;
        }
        .dialog-reg {
            width: 100%;
            max-width: 500px;
            position: absolute; left: 0; top: 0; right: 0; bottom: 0;
            margin: auto;   
        }
        
        .topic {
            position: relative;
            display: flex;
            width: 100%;
            height: 70px;
            background-image: url("./register/bg_topic.png");
            background-position: center center;
            background-size: 100% 100%;
            align-items: center;
            justify-content: center;
        }
        .topic .title{
            height: 40px;
        }
        .topic .close {
            position: absolute;
            right: 10px;
            width: 35px;
        }
        
        .content {
            background-color: transparent;
            background-image: url("./register/bg_form.png");
            background-size: 100% 100%;
        }
        
        .layui-form {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding-top: 25px;
        }
        
        .input_box {
            display: flex;
            align-items: center;
            width: calc(100% - 30px);
            height: 60px;
            line-height: 60px;
            border: 1px solid #716daa;
            border-radius: 10px;
            color: #ead4aa;
            margin-bottom: 14px;
            /* Permalink - use to edit and share this gradient: https://colorzilla.com/gradient-editor/#2c356a+0,242a4e+100 */
            background: #2c356a;
            /* Old browsers */
            background: -moz-linear-gradient(top, #2c356a 0%, #242a4e 100%);
            /* FF3.6-15 */
            background: -webkit-linear-gradient(top, #2c356a 0%, #242a4e 100%);
            /* Chrome10-25,Safari5.1-6 */
            background: linear-gradient(to bottom, #2c356a 0%, #242a4e 100%);
            /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
            filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#2c356a', endColorstr='#242a4e', GradientType=0);
            /* IE6-9 */
        }
        
        .head_icon {
            width: 15px !important;
        }
        
        .input_box img {
            width:20px;
            margin-left: 10px;
        }
        
        input {
            width: 95%;
            margin-left: 10px;
            font-size: 20px;
            background-color: transparent;
            box-shadow: none;
            color: #ead4aa;
            border: none;
            outline: none;
            -webkit-appearance: none;
        }
        
        .group {
            width: calc(100% - 30px);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .group .input_box {
            width: 55%;
            margin-bottom: 0;
        }
        
        .group .get_auth_code {
            width: 43%;
            height: 60px;
        }
        
        .footer {
            padding: 0 20px;
            margin: 20px 0 10px 0;
        }
        
        .footer img {
            width: 80%;
        }
        .footer button {
            background-color: transparent;
            border: none;
            padding: 0;
            margin-top: 10px;
        }
        .click_download {
            text-align: center;
            font-size: 20px ;
            height: 60px;
            line-height: 60px;
            color: white;
        }
        .click_download span{
            color: #ead4aa;
        }
        ::placeholder {
            color: #ead4aa !important;
        }
    }

}
/* CSS 代码 */
.popup {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
  }
  
  .popup-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
  }
  
  .close {
    color: #aaaaaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
  }
  
  .close:hover,
  .close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
  }
  
  .a-title{
    color: wheat;
  }