* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fff;
    min-height: 100vh;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 1px solid #e0e0e0;
}

.header h1 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 10px;
}

.header p {
    color: #7f8c8d;
    font-size: 1rem;
}

.main {
    margin-bottom: 30px;
}

.feedback-form {
    background-color: #fafafa;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

.required {
    color: #e74c3c;
}

.form-group select,
.form-group textarea,
.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group select:focus,
.form-group textarea:focus,
.form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.error-message {
    color: #e74c3c;
    font-size: 0.875rem;
    margin-top: 5px;
    min-height: 20px;
}

.feedback-type-description {
    font-size: 0.875rem;
    color: #7f8c8d;
    margin-top: 5px;
    padding: 8px 0;
    line-height: 1.5;
}

.form-actions {
    text-align: center;
    margin-top: 30px;
}

.btn {
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background-color: #3498db;
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 3px solid #fff;
    width: 18px;
    height: 18px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.status-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 4px;
    text-align: center;
    font-weight: 600;
}

.status-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #e0e0e0;
    color: #7f8c8d;
    font-size: 0.875rem;
}

/* 照片上传样式 */
.upload-container {
    margin-top: 15px;
}

.upload-options {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.upload-btn {
    padding: 10px 20px;
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: inline-block;
    font-weight: 600;
}

.upload-btn:hover {
    background-color: #2980b9;
}

.photo-preview {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 15px;
}

.photo-item {
    position: relative;
    width: 120px;
    height: 120px;
    border: 2px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f8f9fa;
}

.photo-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.remove-photo {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: rgba(231, 76, 60, 0.8);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

.remove-photo:hover {
    background-color: rgba(192, 57, 43, 0.8);
}

.upload-progress {
    margin-top: 15px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 5px;
}

.progress-fill {
    height: 100%;
    background-color: #3498db;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.875rem;
    color: #7f8c8d;
    text-align: center;
}

/* 单选框组样式 */
.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
    color: #333;
    gap: 8px;
}

.radio-option input[type="radio"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.radio-option span {
    cursor: pointer;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .feedback-form {
        padding: 20px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .btn {
        width: 100%;
        padding: 14px;
    }

    .upload-options {
        flex-direction: column;
    }

    .upload-btn {
        width: 100%;
        text-align: center;
    }

    .photo-preview {
        justify-content: center;
    }

    .photo-item {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.25rem;
    }

    .header p {
        font-size: 0.875rem;
    }

    .feedback-form {
        padding: 15px;
    }

    .form-group select,
    .form-group textarea,
    .form-group input {
        padding: 10px;
        font-size: 0.875rem;
    }

    .photo-item {
        width: 80px;
        height: 80px;
    }
}