@charset "UTF-8";
/* CSS Document */
html, body {
	font-family: "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "メイリオ", Meiryo, Osaka, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
	margin: 0;
	padding: 0;
	scroll-behavior: smooth;
	overflow-x: hidden;
}

section {
	width: 100%;
	max-width: 1200px;
	margin: 0 auto;
	position: relative;
}

img {
	max-width: 100%;
	height: auto;
	margin: 0;
	vertical-align: bottom;
	display: block;
}

/* パフォーマンス最適化：GPU処理のための基本設定 */
* {
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

/* GPU処理を有効化 */
.gpu-accelerated {
	transform: translateZ(0);
	will-change: transform, opacity;
}

/* 位置指定 */
.rel { position: relative; }
.abs { position: absolute; }
.fix { position: fixed; }

/* リンク */
a {
	text-decoration: none;
	display: block;
}

/* スクリーンリーダー用 */
.visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border-width: 0;
}