:root {
	--primary-color: #8B0000;
	/* 深红 */
	--text-dark: #333333;
	--text-gray: #666666;
	--text-light: #999999;
	--bg-white: #ffffff;
	--bg-light: #f9f9f9;
	--transition: all 0.4s ease;
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	font-family: 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
	color: var(--text-dark);
	line-height: 1.6;
	background: #fff;
}

.container {
	margin: 0 auto;
	padding: 5% 4% 2% 8%;
}

.s1-container {
	margin: 0 auto;
	padding: 5% 4% 2% 8%;
}
.s2-container {
	margin: 0 auto;
	padding: 5% 4% 5% 8%;
}
.section-padding {
	padding: 0 8%;
}

.section-title-en {
	font-size: 1.5rem;
	color: var(--text-light);
	text-transform: uppercase;
	letter-spacing: 2px;
	margin-bottom: 10px;
	display: block;
	font-weight: lighter;
}

.section-title-cn {
	font-size: 2rem;
	color: var(--text-dark);
	font-weight: 600;
	margin-bottom: 20px;
	position: relative;
	display: inline-block;
}

.section-title-cn::after {
	content: '';
	position: absolute;
	bottom: -8px;
	left: 0;
	width: 60px;
	height: 2px;
	background: var(--primary-color);
}

.section-desc {
	color: var(--text-gray);
	font-size: 1rem;
	margin-top: 10px;
}

/* ================= 第一屏：Hero 区域 (W 造型) ================= */
.about-hero {
	min-height: 90vh;
	display: flex;
	align-items: center;
	position: relative;
	overflow: hidden;
	background: #fff;
}

.hero-layout {
	display: grid;
	grid-template-columns: 250px 1fr;
	gap: 60px;
	width: 100%;
	align-items: center;
}

.hero-nav {
	border-right: 2px solid black;
	padding-right: 40px;
	padding-bottom: 8rem;
}

.hero-nav h2 {
	font-size: 1.8rem;
	margin: 40px 0;
	font-weight: 400;
	letter-spacing: 2px;
}

.hero-menu {
	list-style: none;
}

.hero-menu li {
	/* margin-bottom: 15px; */
}

.hero-menu a {
	text-decoration: none;
	color: var(--text-light);
	font-size: 1.05rem;
	transition: var(--transition);
	display: block;
	padding: 8px 0;
}

.hero-menu a:hover,
.hero-menu a.active {
	color: var(--primary-color);
	text-decoration: underline;
}

.hero-visual {
	position: relative;
	height: 500px;
	display: flex;
	justify-content: center;
	align-items: center;
	perspective: 1000px;
}

.w-building {
	font-size: 25rem;
	font-weight: 900;
	color: #f0f0f0;
	position: relative;
	transform-style: preserve-3d;
	transform: rotateY(-15deg) rotateX(10deg);
	text-shadow:
		-5px 5px 0px rgba(139, 0, 0, 0.1),
		-10px 10px 0px rgba(139, 0, 0, 0.2),
		-15px 15px 0px rgba(139, 0, 0, 0.3);
	user-select: none;
}

.w-window {
	position: absolute;
	background: rgba(255, 255, 255, 0.8);
	border: 2px solid #333;
	box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.1);
}

.w-win-1 {
	top: 20%;
	left: 25%;
	width: 60px;
	height: 80px;
	transform: rotateY(15deg);
}

.w-win-2 {
	top: 35%;
	left: 45%;
	width: 40px;
	height: 60px;
	transform: rotateY(15deg);
}

.w-win-3 {
	top: 15%;
	left: 60%;
	width: 50px;
	height: 70px;
	transform: rotateY(15deg);
}

.w-win-4 {
	top: 40%;
	left: 75%;
	width: 70px;
	height: 90px;
	transform: rotateY(15deg);
}

.hero-slogan {
	position: absolute;
	bottom: 50px;
	right: 5%;
	text-align: right;
}

.hero-slogan h3 {
	font-size: 1.2rem;
	color: var(--primary-color);
	margin-bottom: 5px;
}

.hero-slogan p {
	font-size: 0.9rem;
	color: var(--text-dark);
	font-weight: bold;
	text-transform: uppercase;
}

.hero-slogan span {
	font-size: 0.75rem;
	color: var(--text-light);
	display: block;
	margin-top: 5px;
}

.logo-deco {
	position: absolute;
	bottom: 50px;
	right: 5%;
	width: 60px;
	height: 60px;
	background: var(--primary-color);
	clip-path: polygon(0 0, 100% 0, 100% 100%, 20% 100%);
	z-index: 10;
}

/* ================= 第二屏：品牌核心理念 ================= */
.brand-core {
	background: var(--bg-light);
}

.core-layout {
display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 80px;
    align-items: start;
    margin-top: 5rem;
}

.core-text h2 {
	font-size: 2.5rem;
	margin-bottom: 20px;
	font-weight: normal;
}

.core-text .subtitle {
    color: var(--text-gray);
    font-size: 1.4rem;
    margin-bottom: 40px;
    margin-top: 1rem;
    display: block;
}

.core-icon-box {
	display: flex;
	align-items: center;
	gap: 20px;
	margin-bottom: 30px;
}

.core-icon {
	width: 60px;
	height: 60px;
	/* background: rgba(139, 0, 0, 0.1); */
	color: var(--primary-color);
	display: flex;
	align-items: center;
	/* justify-content: center; */
	font-size: 1.5rem;
	border-radius: 8px;
}

.core-en-title {
	font-size: 1.5rem;
	color: var(--text-light);
	text-transform: uppercase;
	letter-spacing: 1px;
	line-height: 1.4;
}

.core-image-wrapper {
	position: relative;
	border-radius: 0 0px 20px 20px;
	overflow: hidden;
	/* box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1); */
	/* height: 400px; */
}

.core-image-wrapper img {
	/* width: 100%; */
	/* height: 100%; */
	/* object-fit: cover; */
	transition: transform 0.6s;
}

.core-image-wrapper:hover img {
	transform: scale(1.05);
}

.core-overlay {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: linear-gradient(90deg, rgba(0, 0, 0, 0.2) 0%, rgba(139, 0, 0, 0.8) 100%);
	display: flex;
	flex-direction: column;
	justify-content: center;
	padding: 40px;
	color: #fff;
}

.core-overlay h4 {
	font-size: 1.5rem;
	margin-bottom: 10px;
}

.core-overlay p {
	font-size: 0.9rem;
	opacity: 0.9;
}

.core-overlay .logo-j {
	font-size: 4rem;
	font-weight: 900;
	color: #fff;
	position: absolute;
	right: 20px;
	bottom: 20px;
	opacity: 0.3;
}

.core-desc-text {
color: var(--primary-color);
    line-height: 2;
    font-size: 1rem;
    margin-bottom: 50px;
}

/* ================= 第三屏：三列卡片 (悬停显文) ================= */
.tri-cards {
	background: #fff;
}

.cards-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 10px;
	margin-top: 40px;
}

.card-item {
	background: none;
	/* border-radius: 12px; */
	overflow: hidden;
	/* box-shadow: 0 10px 30px rgba(0,0,0,0.05); */
	transition: transform 0.4s ease, box-shadow 0.4s ease;
	/* border: 1px solid #eee; */
	cursor: pointer;
	position: relative;
	text-align: center;
}

.card-item:hover {
	/* transform: translateY(-8px); */
}

.card-img-box {
	height: 500px;
	position: relative;
	overflow: hidden;
	background: white;
	width: 100%;
	border-radius: 20px;
	    background: rgba(255, 255, 255, 0.1);
	border-radius: 20px;
	/* 圆角 */
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.05);
	/* 主阴影：柔和扩散 */
	border: 1px solid rgba(220, 220, 220, 0.6);
	/* 极淡边框，提升质感 */
	transition: all 0.3s ease;
}

.card-item:hover .card-img-box img {
	display: none;
}

.card-item .card-img-box .text-box-item {
	display: none;
}

.card-item:hover .card-img-box .text-box-item {
	display: block;
}

.card-item:hover .card-img-box .text-box-item .text-info {
	display: flex;
	    /* justify-content: center; */
	    /* align-items: center; */
	    flex-direction: column;
	    padding: 10%;
	    line-height: 2;
	    text-align: left;
	    font-size: 1rem;
	    font-weight: bold;
	    color: #747474;
}

.card-img-box img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
	display: block;
}

.card-item:hover .card-img-box .ico-img {
	/* transform: scale(1.1); */
    display: block;
}

.card-item .card-img-box .ico-img{
    height: 80px;
    width: auto;
    margin-bottom: 3rem;
}

.card-item:hover .card-img-box::before {}

.card-overlay-content {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: 2;
	padding: 40px 30px;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	text-align: left;
	color: #fff;
	opacity: 0;
	transform: translateY(20px);
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-item:hover .card-overlay-content {
	opacity: 1;
	transform: translateY(0);
}

.card-overlay-content .card-en-title {
	font-size: 0.75rem;
	color: rgba(255, 255, 255, 0.8);
	text-transform: uppercase;
	letter-spacing: 1.5px;
	margin-bottom: 8px;
	font-weight: 600;
}

.card-title {
	color: #747474;
	font-size: 1.4rem;
	font-weight: normal;
	margin-top: 1rem;
	margin-bottom: 5px;
}

.card-img-box-title {
    font-size: 1.4rem;
	color: #747474;
	margin-bottom: 12px;
}

.card-desc {
	font-size: 1rem;
	color: #747474;
}

.card-btn {
	font-size: 0.85rem;
	font-weight: 600;
	color: #fff;
	text-decoration: none;
	display: inline-flex;
	align-items: center;
	gap: 5px;
	border-top: 1px solid rgba(255, 255, 255, 0.3);
	padding-top: 15px;
	opacity: 0;
	transform: translateY(10px);
	transition: all 0.4s ease 0.1s;
}

.card-item:hover .card-btn {
	opacity: 1;
	transform: translateY(0);
}

.card-btn:hover {
	color: #ffcccc;
}

/* ================= 响应式 ================= */
@media (max-width: 1024px) {
	.hero-layout {
		grid-template-columns: 1fr;
		text-align: center;
	}

	.hero-nav {
		border-right: none;
		border-bottom: 1px solid #eee;
		padding-bottom: 20px;
		margin-bottom: 40px;
	}

	.hero-menu {
		display: flex;
		justify-content: center;
		gap: 20px;
	}

	.hero-menu a:hover {
		padding-left: 0;
	}

	.w-building {
		font-size: 15rem;
	}

	.core-layout {
		grid-template-columns: 1fr;
	}

	.core-desc-text {
		grid-column: 1;
	}

	.cards-grid {
		grid-template-columns: 1fr;
	}

	.card-img-box {
		height: 250px;
	}

	/* 移动端默认显示文字 */
	.card-overlay-content {
		opacity: 1;
		transform: translateY(0);
	}

	.card-btn {
		opacity: 1;
		transform: translateY(0);
	}

	.card-img-box::before {
		opacity: 0.7;
	}
}

@media (max-width: 768px) {
	.section-title-cn {
		font-size: 1.5rem;
	}

	.w-building {
		font-size: 10rem;
	}

	.hero-slogan {
		position: relative;
		bottom: auto;
		right: auto;
		text-align: center;
		margin-top: 20px;
	}

	.logo-deco {
		display: none;
	}
}