/* iOS Safari 低内存模式：关闭高成本合成和固定背景。 */
@supports (-webkit-touch-callout: none) {
	html.swl-ios-performance,
	html.swl-ios-performance body {
		background-attachment: scroll !important;
	}

	html.swl-ios-performance * {
		-webkit-backdrop-filter: none !important;
		backdrop-filter: none !important;
	}
}

/* 对长文章按块跳过离屏渲染，降低 Safari 深度缩放时的光栅/图层内存。 */
@supports (content-visibility: auto) {
	html.swl-ios-performance .post-content > * {
		content-visibility: auto;
		contain-intrinsic-size: auto 600px;
	}
}