/* 关于我们页 / 方案案例归档页：横幅 + 正文 + 左侧侧栏
 * 注意：这里复用详情页侧栏类 .jby-side，但详情页侧栏是 sticky 定位；
 * 在 about-body 这种 flex 两栏布局里，sticky 会破坏主内容区，必须重置为 static。 */
.jby-about .about-body .jby-side,
.jby-case .about-body .jby-side {
	position: static;
	top: auto;
}

.about-banner {
	position: relative;
	height: 440px;
	overflow: hidden;
	margin: 0 0 30px;
}
.about-banner-img {
	position: absolute;
	inset: 0;
	background-color: #222;
	background-position: center;
	background-size: cover;
	background-repeat: no-repeat;
}
.about-banner-mask {
	position: absolute;
	inset: 0;
	background: rgba(18, 18, 18, 0.45);
}
.about-banner-text {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 54px;
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 20px;
	color: #fff;
}
.about-banner-text h1 {
	font-size: 34px;
	font-weight: 700;
	margin: 0 0 10px;
	color: #fff;
	text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}
.about-banner-text p {
	font-size: 16px;
	margin: 0;
	color: #f2f2f2;
}

.about-body {
	display: flex;
	gap: 36px;
	align-items: flex-start;
}
.about-main {
	flex: 1 1 auto;
	min-width: 0;
}
.about-main h2 {
	font-size: 20px;
	font-weight: 600;
	color: var(--jby-primary);
	line-height: 1.4;
	margin: 32px 0 14px;
	padding-left: 12px;
	border-left: 4px solid var(--jby-accent);
}
.about-main h2:first-child {
	margin-top: 0;
}
.about-main p,
.about-main ul {
	font-size: 15px;
	line-height: 1.95;
	color: #42525F;
}
.about-main ul {
	margin: 0 0 16px;
	padding-left: 22px;
}
.about-main ul li {
	margin-bottom: 8px;
}
.about-side {
	flex: 0 0 300px;
	width: 300px;
}

/* 面包屑：独立成行、防换行竖排 */
.about-crumb {
	padding: 18px 0 10px;
}
.about-crumb .jby-crumb {
	display: flex;
	flex-wrap: nowrap;
	align-items: center;
	gap: 6px;
}
.jby-about .jby-crumb a,
.jby-about .jby-crumb span,
.jby-about .jby-crumb .sep,
.jby-case .jby-crumb a,
.jby-case .jby-crumb span,
.jby-case .jby-crumb .sep {
	display: inline-flex;
	align-items: center;
	white-space: nowrap;
	flex-shrink: 0;
}

@media (max-width: 900px) {
	.about-banner {
		height: 300px;
	}
	.about-banner-text {
		bottom: 28px;
	}
	.about-banner-text h1 {
		font-size: 26px;
	}
	.about-banner-text p {
		font-size: 14px;
	}
	.about-body {
		flex-direction: column;
		gap: 0;
	}
	.about-main h2 {
		font-size: 18px;
		margin-top: 26px;
	}
	/* 手机端隐藏侧栏 */
	.about-side {
		display: none;
	}
}