.form-group-radio-radio {
    margin: 20px;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 8px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.form-group-radio label {
    display: inline-block;
    position: relative;
    padding-left: 30px;
    margin-right: 20px;
    cursor: pointer;
    font-size: 16px;
    color: #333;
    line-height: 20px;
    transition: color 0.3s ease;
}

.form-group-radio.bigtextv1 label {
    font-size: 18px;
}

.form-group-radio label:hover {
    color: #007bff;
}
.form-group-radio input[type="radio"],
.form-group-radio input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}
/* 自定義單選按鈕樣式 */
.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    width: 20px;
    background-color: #fff;
    border: 2px solid #ddd;
    border-radius: 50%;
    transition: all 0.3s ease;
}
.form-group-radio label:hover input ~ .checkmark {
    border-color: #007bff;
}
.form-group-radio input:checked ~ .checkmark {
    background-color: #fff;
    border-color: #007bff;
}
/* 選中狀態的內部圓點 */
.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #007bff;
    transition: all 0.3s ease;
}
.form-group-radio input:checked ~ .checkmark:after {
    display: block;
}