.document-preview {
    margin: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    border-radius: 4px;
}

.responsive-preview {
    min-height: 400px;
}

.doc-preview-placeholder {
    padding: 2rem;
    text-align: center;
    border: 1px dashed #ccc;
    color: #666;
    margin: 1rem 0;
}

.doc-preview-error {
    padding: 2rem;
    text-align: center;
    color: #dc3232;
    background: #fef0f0;
    border: 1px solid #fcd3d3;
    border-radius: 4px;
    margin: 1rem 0;
}

/* 禁止选择和右键 */
.document-preview img {
    pointer-events: none; /* 禁止点击图片 */
    user-select: none; /* 禁止选择 */
}

/* 响应式适配 */
@media (max-width: 768px) {
    .document-preview {
        width: 100% !important;
    }
}