section.mailform {
	> div {
		> div.step {
			max-width: 800px;
			margin-inline: auto;
			display: grid;
			grid-template-columns: repeat(3,1fr);
			background-color: #eee;
			> div#formStep1 {
				font-size: min(0.8rem,4.5vw);
				line-height: 1;
				color: #222;
				padding-block: 8px;
				text-align: center;
				clip-path: polygon(0 0,95% 0,100% 50%,95% 100%,0 100%);
				&.on {
					background-color: var(--color-accent);
					color: #fff;
				}
			}
			> div#formStep2 {
				font-size: min(0.8rem,4.5vw);
				line-height: 1;
				color: #222;
				padding-block: 8px;
				text-align: center;
				clip-path: polygon(0 0,95% 0,100% 50%,95% 100%,0 100%,5% 50%);
				background-color: rgba(0,0,0,0.05);
				&.on {
					background-color: var(--color-accent);
					color: #fff;
				}
			}
			> div#formStep3 {
				font-size: min(0.8rem,4.5vw);
				line-height: 1;
				color: #222;
				padding-block: 8px;
				text-align: center;
				clip-path: polygon(0 0,100% 0,100% 100%,0 100%,5% 50%);
				&.on {
					background-color: var(--color-accent);
					color: #fff;
				}
			}
		}
		> form {
			margin-top: 10px;
			margin-bottom: 0;
			> div.input {
				max-width: 800px;
				margin-inline: auto;
				display: flex;
				flex-direction: column;
				row-gap: 5px;
				> dl {
					display: grid;
					grid-template-columns: 200px 1fr;
					column-gap: 5px;
					@media (width < 810px) {
						grid-template-columns: 1fr;
					}
					&.wide {
						display: block;
					}
					> dt {
						user-select: none;
						padding-block: 5px;
						padding-inline: 8px;
						display: flex;
						align-items: start;
						justify-content: space-between;
						background-color: #eee;
						@media (width < 810px) {
							padding-inline: 5px;
						}
						> .item {
							font-size: 0.9rem;
							line-height: 1.3;
							color: #111;
							font-weight: 500;
							> span.expand {
								color: var(--color-accent);
								cursor: pointer;
								padding-inline: 10px;
								opacity: 0.5;
								&:hover {
									opacity: 1;
									background-color: #bbb;
								}
							}
							> br.pc {
								@media (width < 810px) {
									display: none;
								}
							}
						}
						> .require {
							font-size: 0.8rem;
							line-height: 1;
							color: var(--color-accent);
							border: solid 1px currentColor;
							text-align: center;
							padding: 1px 5px 3px 5px;
							border-radius: 3px;
							white-space: nowrap;
							&:empty {
								border: none;
							}
						}
					}
					> dd {
						> div.control {
							display: flex;
							column-gap: 5px;
							@media (width < 810px) {
								flex-direction: column;
								&:has(span.radio) {
									margin-top: 3px;
								}
							}
							> div {
								width: 100%;
								position: relative;
								&:has(> div > span.radio),
								&:has(> div > div.checkbox) {
									padding-right: 40px;
								}
								> div {
									display: flex;
									flex-wrap: wrap;
									gap: 3px;
									input[type="text"],
									select,
									textarea {
										width: 100%;
										transition: 0.3s;
										font-family: inherit;
									}
									textarea {
										field-sizing: content;
									}
								}
								> div[data-validate-mark] {
									position: absolute;
									top: 13px;
									right: 9px;
									width: 16px;
									height: 16px;
									background-image: url(../../common/image/form_validate_none.svg);
									background-repeat: no-repeat;
									&[data-mark="ok"] {
										background-image: url(../../common/image/form_validate_ok.svg);
									}
									&[data-mark="ng"] {
										background-image: url(../../common/image/form_validate_ng.svg);
									}
									&[disabled="disabled"] {
										visibility: hidden;
									}
								}
							}
							> button {
								width: 200px;
							}
						}
						> div.plain {
							> div {
								display: flex;
								flex-direction: column;
								row-gap: 5px;
								padding-bottom: 10px;
								> div {
									border-top: dotted 1px #aaa;
									&:nth-of-type(1) {
										border-top: none;
									}
									> input {
										accent-color: var(--color-accent);
									}
									> label {
										font-size: 1rem;
										line-height: 1.2;
										color: #00a;
										cursor: pointer;
									}
									> p {
										font-size: 0.8rem;
										line-height: 1.4;
										color: #222;
										padding-left: 2em;
									}
								}
							}
						}
						> div[data-validate-error] {
							position: relative;
							> div {
								position: absolute;
								left: 10px;
								top: -15px;
								font-size: 0.8rem;
								line-height: 1;
								color: #f20;
							}
						}
					}
				}
			}
			> .policy {
				max-width: 800px;
				margin: 10px auto 0 auto;
				> p {
					font-size: 0.9rem;
					line-height: 1.8;
					color: #333;
					padding-left: 1em;
					text-indent: -1em;
					> a {
						color: var(--color-accent);
						&:hover {
							opacity: 0.7;
						}
					}
				}
			}
			> .submit {
				margin-top: 20px;
				display: flex;
				column-gap: 5px;
				> button {
					width: 100%;
					height: 3.5rem;
					border-radius: 8px;
				}
			}
		}
	}
}