/* --- 主容器 (全屏) --- */
.hero-section {
	width: 100%;
	height: 100vh;
	/* 强制全屏高度 */
	min-height: 700px;
	/* 防止在小屏幕笔记本上内容挤压 */
	position: relative;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	text-align: center;
	overflow: hidden;

	/* 背景图设置 - 这里使用了一个占位城市图，请替换为你真实的背景图URL */
	background-image: url(../images/about/1.png);
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
}
.hero-section .sea{
	width: 100vw;
	height: 100vh;
	position: absolute;
	background-image: url(../images/about/sea0.png);
	background-size: cover;
}
.hero-section .builder{
	width: 100vw;
	height: 100vh;
	position: absolute;
	background-image: url(../images/about/build.png);
	background-size: cover;
	background-position: center;
	/* 初始状态：完全透明，并向下偏移 50px */
	opacity: 0;
	transform: translateY(150px);
	/* 设置过渡效果：针对 opacity 和 transform，时长 1s，平滑缓动 */
	transition: opacity 1s ease-in-out 1s, transform 2s ease-in-out 1s;
}
/* 当所在 section 变为 active 时，触发目标状态 */
.section.active .builder {
  opacity: 1;
  transform: translateY(0);
}
.hero-section .big-title{
	width: 100vw;
	height: 100vh;
	position: absolute;
	background-image: url(../images/about/build.png);
	background-size: cover;
	 /* 初始状态：完全透明，并向下偏移 50px */
	opacity: 0;
	transform: translateY(150px);
	/* 设置过渡效果：针对 opacity 和 transform，时长 1s，平滑缓动 */
	transition: opacity 1s ease-in-out, transform 2s ease-in-out;
}
/* 当所在 section 变为 active 时，触发目标状态 */
.section.active .big-title{
  opacity: 1;
  transform: translateY(0);
}
.hero-section .big-title{
	background-repeat: no-repeat;
	    width: 100vw;
	    height: 110px;
	    position: absolute;
	    background-image: url(../images/about/title1.png);
	    background-position: center;
	    background-size: contain;
	}

/* 内容包裹层，限制最大宽度 */
.content-wrapper {
	width: 100%;
	max-width: 1200px;
	padding: 0 20px;
	z-index: 2;
	display: flex;
	flex-direction: column;
	height: 100%;
	justify-content: space-between;
	/* 让文字在上，数据在下 */
	padding-top: 15vh;
	padding-bottom: 5vh;
}

/* --- 上半部分：文本区域 --- */
.text-area {
	max-width: 800px;
	text-align: left;
	/* margin: 0 auto; */
}

.main-title {
	font-size: 2.5rem;
	font-weight: 700;
	color: black;
	/* margin-bottom: 20px; */
	text-transform: uppercase;
	letter-spacing: 1px;
}

.description {
	font-size: 1.1rem;
	color: black;
	margin-bottom: 30px;
	max-width: 700px;
	/* margin-left: auto; */
	margin-right: auto;
}

/* 按钮样式 */
.btn-view-more {
	display: inline-block;
	padding: 12px 35px;
	border: 1px solid #d32f2f;
	border-radius: 50px;
	color: #d32f2f;
	/* 红色文字 */
	text-decoration: none;
	font-weight: 600;
	transition: all 0.3s ease;
	/* background-color: #fff; */
	/* box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05); */
}

.btn-view-more:hover {
	background-color: #d32f2f;
	color: #fff;
	border-color: #d32f2f;
	transform: translateY(-2px);
}

/* --- 下半部分：数据统计区域 --- */
.stats-container {
	display: flex;
	justify-content: space-around;
	align-items: flex-end;
	margin-top: auto;
	/* 推到底部 */
	flex-wrap: wrap;
	gap: 20px;
}

.stat-item {
	flex: 1;
	min-width: 200px;
	display: flex;
	flex-direction: column;
	align-items: center;
}

.stat-icon {
	width: 40px;
	height: 40px;
	fill: #d32f2f;
	/* 图标红色 */
	margin-bottom: 10px;
}

.stat-number {
	font-size: 2.2rem;
	font-weight: 700;
	color: #d32f2f;
	line-height: 1.2;
	margin-top: 25px;
}

.stat-unit {
	font-size: 1rem;
	color: #d32f2f;
	font-weight: normal;
}

.stat-label {
	font-size: 1.2rem;
	color: black;
	text-transform: uppercase;
	font-weight: 600;
	margin-top: 5px;
}

/* --- 响应式适配 (平板和手机) --- */
@media (max-width: 768px) {
	.hero-section {
		height: auto;
		/* 手机上允许滚动，不强制一屏 */
		min-height: 100vh;
		/* padding: 60px 0; */
	}

	.content-wrapper {
		padding-top: 40px;
		padding-bottom: 40px;
		justify-content: center;
		gap: 50px;
	}

	.main-title {
		font-size: 1.8rem;
	}

	.description {
		font-size: 1rem;
		padding: 0 10px;
	}

	.stats-container {
		flex-direction: row;
		/* 保持横排但换行 */
		flex-wrap: wrap;
		justify-content: center;
	}

	.stat-item {
		width: 45%;
		/* 两列布局 */
		margin-bottom: 30px;
	}

	.stat-number {
		font-size: 1.8rem;
	}
}

@media (max-width: 480px) {
	.stat-item {
		width: 45%;
		min-width: 150px;
		/* 超小屏幕单列 */
	}
}
/* 容器样式 */
        .product-intro-section {
            text-align: center;
            padding: 40px 20px 0px 20px;
            max-width: 900px;
            margin: 0 auto;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; /* 通用无衬线字体 */
        }

        /* 主标题样式 */
        .product-intro-section h2 {
            color: #333333;
            font-size: 24px;
            font-weight: 700;
            text-transform: uppercase; /* 强制大写，符合图片风格 */
			margin-top: 25px;
            margin-bottom: 15px;
            letter-spacing: 1px;
        }

        /* 描述文本样式 */
        .product-intro-section p {
            color: #666666;
            font-size: 15px;
            line-height: 2;
            margin: 0;
            padding-bottom: 20px;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
			.hero-section .big-title{
				display: none;
			}
            .product-intro-section h2 {
                font-size: 20px;
            }
            .product-intro-section p {
                font-size: 14px;
            }
            .hero-section {
                background-image: url(../images/about-us-mob.jpg);
            }
			.text-area {
			    max-width: 800px;
			    text-align: center;
			}
        }