*{
    padding: 0;
    margin: 0;
}
    body {
        font-family: "Microsoft YaHei", sans-serif;
        background: #f2f4f8;
        margin: 0;
        padding: 0;
    }

    .container {
        max-width: 600px;
        margin: 40px auto;
        background: #fff;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        padding: 30px;
        border-radius: 12px;
        color: black;
    }

    h2 {
        text-align: center;
        margin-bottom: 20px;
        color: #333;
    }

    .question {
        display: none;
        margin-bottom: 20px;
        animation: fadeIn 0.3s ease;
    }

    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(5px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .option-btn {
        display: block;
        width: 100%;
        padding: 12px;
        margin: 10px 0;
        border-radius: 8px;
        cursor: pointer;
        border: 1px solid #ccc;
        background: #f7f9fc;
        transition: 0.2s;
        font-size: 16px;
    }

    .option-btn:hover {
        background: #e8f0ff;
        border-color: #6d9bff;
    }

    #nav {
        margin-top: 20px;
        text-align: center;
    }

    .btn {
        padding: 10px 20px;
        margin: 0 5px;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-size: 15px;
        transition: 0.2s;
    }

    .btn-back {
        background: #ddd;
    }

    .btn-back:hover {
        background: #ccc;
    }

    .finished {
        text-align: center;
        font-size: 20px;
        color: #2d8a34;
    }
    .subbtn{
            display: block;
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid #ccc;
    background: #06C863;
    transition: 0.2s;
    font-size: 16px;
    color: white;
    }
    @keyframes scaleDraw{
0%{
transform:scale(1);
}25%{
transform:scale(1.1);
}50%{
transform:scale(1);
}75%{
transform:scale(1.1);
}}.ballon{
-webkit-animation-name:scaleDraw;
-webkit-animation-timing-function:ease-in-out;
-webkit-animation-iteration-count:infinite;
-webkit-animation-duration:5s;
}
.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e1e5eb;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s;
}
  .phone-input-container {
            position: relative;
            display: flex;
            margin: 15px 0;
        }
        
        .phone-prefix {
            padding: 14px 16px;
            background-color: #f8f9fa;
            border: 2px solid #e1e5eb;
            border-right: none;
            border-radius: 8px 0 0 8px;
            font-weight: 600;
            color: #2c3e50;
        }
        
        .phone-input {
            border-radius: 0 8px 8px 0;
            flex: 1;
        }