semi-design/packages/semi-ui/_base/_story/a11y.scss

body[data-page="a11y"] {
    overflow: hidden;

    #root {
        padding: 0 !important;

        .semi-slider {
            padding: 0;
        }

        .rows-container > .semi-row {
            margin-bottom: 24px;
        }

        .mt12 {
            margin-top: 12px;
        }

        .mb12 {
            margin-bottom: 12px;
        }
    }
    
    .grid {
        .semi-row,
        .semi-row-flex {
            text-align: center;
    
            .semi-col {
                min-height: 30px;
                line-height: 30px;
                background: var(--semi-color-primary-light-default);
                outline: 1px solid var(--semi-color-primary-light-active);
            }
        }
    
        &.grid-gutter {
    
            .semi-col {
    
                .gutter-box,
                .col-content {
                    background: var(--semi-color-primary-light-hover);
                }
            }
        }
    }
}