/*
 * ETheme-Block — faq（常见问题手风琴）
 */

.etb-faq {
	box-sizing: border-box;
	width: 100%;
	padding-block: var(--eth-section-space-y, 3rem);
}

.etb-faq__inner {
	max-width: var(--eth-container, 1350px);
	margin-inline: auto;
	padding-inline: var(--eth-section-space-x, 1.5rem);
}

.etb-faq__body {
	display: grid;
	gap: var(--eth-space-l, 2.5rem);
	grid-template-columns: minmax(0, 1fr);
}

/* ============================================================
 * 左右布局（split）
 * ============================================================ */

.etb-faq--layout-split .etb-faq__body {
	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.etb-faq--split-right .etb-faq__body {
	grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.etb-faq--split-right .etb-faq__side {
	order: 1;
}

.etb-faq--split-right .etb-faq__list {
	order: 0;
}

.etb-faq--split-left .etb-faq__side {
	order: 0;
}

.etb-faq--split-left .etb-faq__list {
	order: 1;
}

.etb-faq__side {
	min-width: 0;
}

/* 侧栏文字（经典编辑器内容） */
.etb-faq__side-content {
	line-height: var(--eth-lh-body, 1.6);
	color: var(--eth-text-body, #333);
}

.etb-faq__side-content > :first-child {
	margin-top: 0;
}

.etb-faq__side-content > :last-child {
	margin-bottom: 0;
}

.etb-faq__side-content img {
	max-width: 100%;
	height: auto;
}

.etb-faq__side-image {
	display: block;
	width: 100%;
	height: auto;
	border-radius: var(--eth-radius-m, 0.8rem);
}

.etb-faq__side-placeholder {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 200px;
	border: 1px dashed var(--eth-border, rgba(0, 0, 0, 0.12));
	border-radius: var(--eth-radius-m, 0.8rem);
	color: var(--eth-text-muted, #555);
}

/* ============================================================
 * 多列网格（columns）
 * ============================================================ */

.etb-faq--layout-columns .etb-faq__list {
	display: grid;
	grid-template-columns: repeat(var(--etb-faq-cols, 2), minmax(0, 1fr));
	gap: var(--eth-space-m, 1.5rem);
	align-items: start;
}

.etb-faq--layout-columns.etb-faq--cols-3 .etb-faq__list {
	--etb-faq-cols: 3;
}

/* ============================================================
 * 手风琴项
 * ============================================================ */

.etb-faq__item {
	border-bottom: 1px solid var(--eth-border, rgba(0, 0, 0, 0.12));
}

.etb-faq__question {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--eth-space-s, 1rem);
	padding: var(--eth-space-s, 1rem) 0;
	cursor: pointer;
	font-weight: var(--eth-fw-semibold, 600);
	color: var(--eth-text-title, #111);
	list-style: none;
	transition: color var(--eth-transition-s, 0.15s ease);
}

.etb-faq__question:hover {
	color: var(--eth-primary, #4f46e5);
}

.etb-faq__question:focus-visible {
	outline: 3px solid var(--eth-primary-50, color-mix(in srgb, var(--eth-primary, #4f46e5) 50%, transparent));
	outline-offset: 3px;
	border-radius: var(--eth-radius-xs, 0.25rem);
}

.etb-faq__question::-webkit-details-marker {
	display: none;
}

.etb-faq__question::after {
	content: "+";
	flex: 0 0 auto;
	font-size: 1.25rem;
	line-height: 1;
	color: var(--eth-primary, #4f46e5);
	transition: transform var(--eth-transition-s, 0.15s ease);
}

.etb-faq__item[open] .etb-faq__question::after {
	transform: rotate(45deg);
}

/* 手风琴平滑过渡：不设置固定 max-height，长答案始终完整可见。 */
.etb-faq__answer {
	display: grid;
	grid-template-rows: 0fr;
	padding-bottom: 0;
	overflow: hidden;
	transition: grid-template-rows var(--eth-transition-m, 0.25s ease), padding-bottom var(--eth-transition-m, 0.25s ease);
}

.etb-faq__answer-content {
	min-height: 0;
	line-height: var(--eth-lh-body, 1.6);
	color: var(--eth-text-body, #333);
}

.etb-faq__item[open] .etb-faq__answer {
	grid-template-rows: 1fr;
	padding-bottom: var(--eth-space-s, 1rem);
}

/* ============================================================
 * 滚动入场（偏克制：8px + 0.25s）
 * ============================================================ */

:where(html.etb-has-js) .etb-reveal .etb-faq__inner {
	opacity: 0;
	transform: translateY(8px);
	transition: opacity 0.35s ease, transform 0.35s ease;
}

.etb-reveal.etb-reveal--visible .etb-faq__inner,
.etb-no-anim .etb-faq__inner {
	opacity: 1;
	transform: none;
}

.etb-faq__item {
	transition: opacity 0.25s ease, transform 0.25s ease;
}

.etb-reveal.etb-reveal--visible .etb-faq__item:nth-child(n+2) {
	transition-delay: calc((var(--faq-index, 0)) * 0s);
}

@media (prefers-reduced-motion: reduce) {
	.etb-faq__answer,
	.etb-faq__answer-content,
	.etb-faq__question,
	.etb-faq__question::after,
	.etb-reveal .etb-faq__inner {
		transition: none;
	}

	.etb-reveal .etb-faq__inner {
		opacity: 1;
		transform: none;
	}
}

.etb-faq__empty {
	padding: var(--eth-space-m, 1.5rem);
	text-align: center;
	color: var(--eth-text-muted, #555);
}

@media (max-width: 992px) {
	.etb-faq--layout-split .etb-faq__body,
	.etb-faq--split-left .etb-faq__body,
	.etb-faq--split-right .etb-faq__body {
		grid-template-columns: minmax(0, 1fr);
	}

	.etb-faq--split-right .etb-faq__side,
	.etb-faq--split-left .etb-faq__side,
	.etb-faq--split-right .etb-faq__list,
	.etb-faq--split-left .etb-faq__list {
		order: 0;
	}

	.etb-faq--layout-columns .etb-faq__list,
	.etb-faq--layout-columns.etb-faq--cols-3 .etb-faq__list {
		grid-template-columns: minmax(0, 1fr);
	}
}

/* ============================================================
 * FAQ 风格（0.9.6）
 * ============================================================ */

/* 风格 1：极简下划线（默认）——现有样式即此，无需额外 */

/* 风格 2：描边卡片 */
.etb-faq.is-style-bordered .etb-faq__item {
	border: 1px solid var(--eth-border, rgba(0, 0, 0, 0.12));
	border-radius: var(--eth-radius-m, 0.8rem);
	margin-bottom: var(--eth-space-2xs, 0.6rem);
	padding: 0 var(--eth-space-s, 1rem);
	background: var(--eth-bg-surface, #fff);
}

/* 风格 3：填充色块 */
.etb-faq.is-style-filled .etb-faq__item {
	border: 1px solid transparent;
	border-radius: var(--eth-radius-m, 0.8rem);
	margin-bottom: var(--eth-space-2xs, 0.6rem);
	padding: 0 var(--eth-space-s, 1rem);
	background: var(--eth-bg-muted, #f2f2f2);
}

.etb-faq.is-style-filled .etb-faq__item[open] {
	background: var(--eth-primary-10, #eef2ff);
	border-color: var(--eth-primary-20, rgba(79, 70, 229, 0.2));
}

/* 风格 4：整块盒子（合并为一个大卡片） */
.etb-faq.is-style-boxed .etb-faq__list {
	border: 1px solid var(--eth-border, rgba(0, 0, 0, 0.12));
	border-radius: var(--eth-radius-l, 1.25rem);
	padding: var(--eth-space-2xs, 0.6rem) var(--eth-space-m, 1.5rem);
	background: var(--eth-bg-surface, #fff);
	box-shadow: var(--eth-shadow-s, 0 2px 6px rgba(0, 0, 0, 0.08));
}

.etb-faq.is-style-boxed .etb-faq__item {
	border-bottom: 1px solid var(--eth-border, rgba(0, 0, 0, 0.12));
}

.etb-faq.is-style-boxed .etb-faq__item:last-child {
	border-bottom: 0;
}