.feedback-header {
            text-align: center;
            margin-bottom: 35px;
        }
        .feedback-header h2 {
            color: #333;
            font-weight: 700;
            font-size: 28px;
        }
#feedbackForm {
    width: 100%;
    padding: 0.3rem;
    box-sizing: border-box;
    background: #fff;
}

/* 每行改为纵向排列，每项占满一行 */
#feedbackForm .row {
    display: flex;
    flex-direction: column;
    gap: 0;
}

#feedbackForm .row .mb5 {
    flex: 1 1 100%;
    width: 100%;
    min-width: 0;
}

#feedbackForm .mb5 {
    width: 100%;
    margin-bottom: 0.3rem;
}

#feedbackForm .form-label {
    display: block;
    font-size: 0.28rem;
    color: #333;
    margin-bottom: 0.12rem;
}

#feedbackForm .required {
    color: #e74c3c;
}

#feedbackForm .form-control {
    width: 100%;
    box-sizing: border-box;
    height: 0.8rem;
    padding: 0 0.25rem;
    border: none;
    outline: none;
    background: #f2f2f2;
    border-radius: 0.4rem;
    font-size: 16px;
    color: #333;
    -webkit-appearance: none;
}

#feedbackForm .form-control::placeholder {
    color: #999;
}

#feedbackForm textarea.form-control {
    height: auto;
    min-height: 2.4rem;
    padding: 0.2rem 0.25rem;
    border-radius: 0.2rem;
    line-height: 1.5;
    resize: vertical;
}

#feedbackForm .form-control:focus {
    background: #eaeaea;
}

#feedbackForm .captcha-group {
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

#feedbackForm .captcha-group .form-control {
    flex: 1;
    min-width: 0;
}

#feedbackForm .captcha-img {
    height: 0.8rem;
    width: auto;
    border-radius: 0.15rem;
    cursor: pointer;
    flex: 0 0 auto;
}

#feedbackForm .captcha-group i.bi-arrow-clockwise {
    font-size: 0.36rem;
    color: #007bff;
    cursor: pointer;
}

#feedbackForm .btn-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.1rem;
    height: 0.8rem;
    padding: 0 0.6rem;
    border: none;
    border-radius: 0.4rem;
    background: #007bff;
    color: #fff;
    font-size: 0.3rem;
    cursor: pointer;
}

#feedbackForm .btn-submit:active {
    background: #0062cc;
}

/* 小屏无需再改列，已是单列 */