html {
	font-size: 62.5%;
}
body {
	margin: 0;
	font-size: 1.5rem;
}

p {
	margin: 0 0 1em;
}
img {
	width: 100%;
	max-width: 100%;
	height: auto;
	vertical-align: bottom;
}
svg {
	vertical-align: bottom;
}
*, *::before, *::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
.contents {
	max-width: 630px;
	margin: 0 auto;
	padding: 20px 40px;
	background: #f2f2f2;
}
.title {
	margin: 0 0 1em;
	font-weight: bold;
}

.div-parent {
	position: relative;
	width: 100%;
	max-width: 350px;
	margin: 0 auto 2em;
}
.mask-img {
	mask-image: url(../img/mask.svg);
}
.style01 {
	mask-size: contain;
	mask-repeat: no-repeat;
}
.style02 {
	mask-size: contain;
	mask-repeat: no-repeat;
	mask-position: center;
}
.style03 {
	max-width: 467px;
}
.style04 {
	mask-size: cover;
}

.copyright {
	text-align: center;
	padding-top: 1em;
	font-size: 14px;
}