/* About Energy Storage Testing Section - 走进储能检测模块 */

.about-est {
	position: relative;
	padding: 48px 0 64px;
	background: #ffffff;
}

.about-est__inner {
	position: relative;
}

/* ========== 顶部标题区 ========== */
.about-est__header {
	text-align: center;
	margin-bottom: 56px;
	position: relative;
}

.about-est__title {
	margin: 0 0 12px;
	font-size: 40px;
	font-weight: 700;
	line-height: 1.3;
	color: #1a1a1a;
	letter-spacing: 1px;
	display: inline-block;
	position: relative;
	padding-bottom: 16px;
}

/* 标题下方短装饰线 */
.about-est__title::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	width: 56px;
	height: 3px;
	background: #ff8a1f;
}

.about-est__title-accent {
	color: #1e8a47;
}

.about-est__subtitle {
	margin: 12px 0 0;
	font-size: 16px;
	font-weight: 400;
	line-height: 1.6;
	color: #666666;
	letter-spacing: 0.5px;
}

/* ========== 主体内容区：左文右图 ========== */
.about-est__body {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 48px;
	align-items: stretch;
}

/* ========== 左侧：文字介绍 ========== */
.about-est__content {
	position: relative;
}

.about-est__content-inner {
	position: relative;
	padding: 8px 0 8px 8px;
	height: 100%;
	display: flex;
	flex-direction: column;
}

/* 背景大字 ABOUT US 水印 */
.about-est__bg-text {
	position: absolute;
	top: -8px;
	left: 0;
	font-size: 120px;
	font-weight: 900;
	line-height: 1;
	color: #f0f0f0;
	letter-spacing: 4px;
	pointer-events: none;
	z-index: 0;
	font-family: Arial, sans-serif;
	opacity: 0.85;
}

/* 左侧红色竖线装饰 */
.about-est__deco-line {
	position: absolute;
	top: 0;
	left: 0;
	width: 4px;
	height: 120px;
	background: #e63946;
	z-index: 2;
}

/* 公司名称 */
.about-est__company-name {
	margin: 0 0 20px;
	padding-left: 20px;
	font-size: 22px;
	font-weight: 700;
	line-height: 1.4;
	color: #1e8a47;
	letter-spacing: 0.5px;
	position: relative;
	z-index: 1;
}

/* 公司简介 */
.about-est__intro {
	position: relative;
	z-index: 1;
	padding-left: 20px;
	flex: 1;
}

.about-est__intro p {
	margin: 0 0 16px;
	font-size: 15px;
	font-weight: 400;
	line-height: 1.9;
	color: #555555;
	letter-spacing: 0.3px;
	text-indent: 0;
}

.about-est__intro p:last-child {
	margin-bottom: 0;
}

/* ========== 底部：按钮 + 电话 ========== */
.about-est__actions {
	position: relative;
	z-index: 1;
	padding-left: 20px;
	margin-top: 28px;
	display: flex;
	align-items: center;
	gap: 28px;
	flex-wrap: wrap;
}

/* 橙色按钮 */
.about-est__btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 12px 28px;
	font-size: 16px;
	font-weight: 600;
	line-height: 1.4;
	color: #ffffff;
	background: #ff8a1f;
	border-radius: 2px;
	text-decoration: none;
	transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
	letter-spacing: 0.5px;
	white-space: nowrap;
}

.about-est__btn:hover {
	color: #ffffff;
	background: #f27606;
	box-shadow: 0 4px 14px rgba(255, 138, 31, 0.4);
	transform: translateY(-1px);
}

.about-est__btn:active {
	transform: translateY(0);
}

/* 电话热线 */
.about-est__hotline {
	display: flex;
	align-items: center;
	gap: 14px;
}

.about-est__hotline-icon {
	width: 44px;
	height: 44px;
	flex-shrink: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(30, 138, 71, 0.08);
	border-radius: 50%;
}

.about-est__hotline-icon svg {
	width: 24px;
	height: 24px;
	display: block;
}

.about-est__hotline-text {
	display: flex;
	flex-direction: column;
	line-height: 1.3;
}

.about-est__hotline-label {
	font-size: 13px;
	font-weight: 400;
	color: #888888;
	margin-bottom: 2px;
	letter-spacing: 0.3px;
}

.about-est__hotline-number {
	font-size: 30px;
	font-weight: 700;
	color: #ff8a1f;
	letter-spacing: 1px;
	font-family: Arial, sans-serif;
}

/* ========== 右侧：图片展示 ========== */
.about-est__image-wrap {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
}

.about-est__image-frame {
	position: relative;
	width: 100%;
}

/* 绿色装饰边框：上方横线 + 右侧竖线（L形） */
.about-est__image-border-deco {
	position: absolute;
	top: -12px;
	right: -12px;
	width: 72%;
	height: calc(100% + 12px);
	border-top: 4px solid #1e8a47;
	border-right: 4px solid #1e8a47;
	z-index: 1;
	pointer-events: none;
}

.about-est__image {
	position: relative;
	width: 100%;
	z-index: 2;
	box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
	background: #f3f4f6;
	overflow: hidden;
}

.about-est__image > img {
	display: block;
	width: 100%;
	height: auto;
	object-fit: cover;
	transition: transform 0.4s ease;
}

.about-est__image:hover > img {
	transform: scale(1.03);
}

/* ========== 响应式适配 ========== */
@media (max-width: 1199px) {
	.about-est {
		padding: 40px 0 56px;
	}

	.about-est__header {
		margin-bottom: 48px;
	}

	.about-est__title {
		font-size: 36px;
	}

	.about-est__bg-text {
		font-size: 100px;
	}

	.about-est__company-name {
		font-size: 20px;
	}

	.about-est__intro p {
		font-size: 14px;
	}

	.about-est__body {
		gap: 36px;
	}

	.about-est__hotline-number {
		font-size: 26px;
	}
}

@media (max-width: 991px) {
	.about-est {
		padding: 36px 0 48px;
	}

	.about-est__header {
		margin-bottom: 40px;
	}

	.about-est__title {
		font-size: 30px;
	}

	.about-est__subtitle {
		font-size: 15px;
	}

	/* 平板：左右布局改为上下布局 */
	.about-est__body {
		grid-template-columns: 1fr;
		gap: 36px;
	}

	.about-est__bg-text {
		font-size: 90px;
	}

	.about-est__image-wrap {
		max-width: 640px;
		margin: 0 auto;
		width: 100%;
	}

	.about-est__actions {
		flex-direction: row;
	}
}

@media (max-width: 767px) {
	.about-est {
		padding: 32px 0 40px;
	}

	.about-est__header {
		margin-bottom: 32px;
	}

	.about-est__title {
		font-size: 26px;
		padding-bottom: 12px;
	}

	.about-est__title::after {
		width: 48px;
		height: 2px;
	}

	.about-est__subtitle {
		font-size: 14px;
	}

	.about-est__body {
		gap: 28px;
	}

	/* 移动端隐藏右侧图片 */
	.about-est__image-wrap {
		display: none;
	}

	.about-est__bg-text {
		font-size: 72px;
		top: 0;
	}

	.about-est__deco-line {
		height: 100px;
	}

	.about-est__company-name {
		font-size: 18px;
		padding-left: 16px;
		margin-bottom: 16px;
	}

	.about-est__intro {
		padding-left: 16px;
	}

	.about-est__intro p {
		font-size: 14px;
		line-height: 1.8;
		margin-bottom: 12px;
	}

	.about-est__actions {
		padding-left: 16px;
		margin-top: 24px;
		gap: 20px;
		flex-direction: column;
		align-items: flex-start;
	}

	.about-est__btn {
		padding: 11px 24px;
		font-size: 15px;
	}

	.about-est__hotline-number {
		font-size: 24px;
	}

	.about-est__hotline-icon {
		width: 40px;
		height: 40px;
	}

	.about-est__hotline-icon svg {
		width: 22px;
		height: 22px;
	}
}

@media (max-width: 480px) {
	.about-est {
		padding: 28px 0 36px;
	}

	.about-est__header {
		margin-bottom: 28px;
	}

	.about-est__title {
		font-size: 22px;
	}

	.about-est__subtitle {
		font-size: 13px;
	}

	.about-est__bg-text {
		font-size: 56px;
		letter-spacing: 2px;
	}

	.about-est__deco-line {
		height: 88px;
		width: 3px;
	}

	.about-est__company-name {
		font-size: 17px;
		padding-left: 14px;
	}

	.about-est__intro {
		padding-left: 14px;
	}

	.about-est__intro p {
		font-size: 13px;
		line-height: 1.75;
	}

	.about-est__actions {
		padding-left: 14px;
		gap: 16px;
	}

	.about-est__btn {
		width: 100%;
		text-align: center;
		padding: 11px 20px;
	}

	.about-est__hotline {
		gap: 12px;
	}

	.about-est__hotline-number {
		font-size: 22px;
	}

	.about-est__image-border-deco {
		top: -8px;
		right: -8px;
		border-top-width: 3px;
		border-right-width: 3px;
	}
}