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

        body {
            font-family: 'Inter', 'Segoe UI', 'Poppins', 'Helvetica Neue', sans-serif;
            background-color: #ffffff;
            color: #1a2c2a;
            line-height: 1.5;
            overflow-x: hidden;
        }

        @import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,500;14..32,600;14..32,700;14..32,800&display=swap');

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== 导航栏 - 透明渐变效果 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            transition: all 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            background: transparent;
            backdrop-filter: none;
            box-shadow: none;
        }

        /* 滚动后的样式：白色背景 + 毛玻璃效果 + 阴影 */
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
        }

        /* 透明状态下导航文字颜色为白色 */
        .site-header:not(.scrolled) .nav-menu li a {
            color: rgba(255, 255, 255, 0.95);
        }

        .site-header:not(.scrolled) .lang-btn {
            color: white;
            border-color: rgba(255,255,255,0.4);
        }

        .site-header:not(.scrolled) .lang-btn i {
            color: white;
        }

        /* 滚动后文字颜色深色 */
        .site-header.scrolled .nav-menu li a {
            color: #2d3e3b;
        }

        .site-header.scrolled .lang-btn {
            color: #2d3e3b;
            border-color: rgba(0,0,0,0.15);
        }

        .site-header.scrolled .lang-btn i {
            color: #FD4E2E;
        }

        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            flex-wrap: wrap;
            transition: padding 0.3s ease;
        }

        .site-header.scrolled .header-inner {
            padding: 18px 0;
        }

        /* Logo 图片样式 */
        .logo {
            display: flex;
            align-items: center;
        }
        .logo-img {
            height: 60px;
            width: auto;
            transition: all 0.3s ease;
            display: block;
        }
        /* 透明状态下的logo1 */
        .logo-img.logo-transparent {
            display: block;
        }
        .logo-img.logo-white {
            display: none;
        }
        /* 滚动后显示logo2 */
        .site-header.scrolled .logo-img.logo-transparent {
            display: none;
        }
        .site-header.scrolled .logo-img.logo-white {
            display: block;
        }

        /* 右侧区域：导航菜单 + 语言切换 + 汉堡菜单 */
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 40px;
        }

        .nav-menu li a {
            text-decoration: none;
            font-weight: 500;
            font-size: 16px;
            transition: 0.25s;
            padding: 8px 0;
            position: relative;
        }

        .nav-menu li a:hover,
        .nav-menu li a.active {
            color: #FD4E2E !important;
        }

        .nav-menu li a.active::after,
        .nav-menu li a:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2.5px;
            background: #FD4E2E;
            border-radius: 2px;
        }

        /* 透明状态下的下划线效果 */
        .site-header:not(.scrolled) .nav-menu li a.active::after,
        .site-header:not(.scrolled) .nav-menu li a:hover::after {
            background: #FD4E2E;
        }

        /* ========== 语言切换下拉菜单 ========== */
        .lang-dropdown {
            position: relative;
            display: inline-block;
        }
        .lang-btn {
            background: transparent;
            border: 1.5px solid rgba(255,255,255,0.3);
            border-radius: 40px;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s ease;
            backdrop-filter: blur(4px);
        }
        .lang-btn i {
            font-size: 16px;
            transition: color 0.2s;
        }
        .lang-btn span {
            font-weight: 500;
        }
        .lang-btn:hover {
            background: rgba(255,255,255,0.15);
            border-color: #FD4E2E;
        }
        .site-header.scrolled .lang-btn:hover {
            background: rgba(0,0,0,0.05);
            border-color: #FD4E2E;
        }
        .dropdown-content {
            position: absolute;
            top: 110%;
            right: 0;
            background: #ffffff;
            min-width: 140px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.12);
            border-radius: 20px;
            overflow: hidden;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.25s ease;
            z-index: 1001;
            border: 1px solid #f0ede8;
        }
        .lang-dropdown:hover .dropdown-content {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .dropdown-content a {
            display: block;
            padding: 12px 20px;
            text-decoration: none;
            color: #1f2e2b;
            font-size: 14px;
            font-weight: 500;
            transition: 0.2s;
        }
        .dropdown-content a:hover {
            background: #fef5ed;
            color: #FD4E2E;
        }
        .dropdown-content a i {
            margin-right: 10px;
            width: 18px;
            color: #FD4E2E;
        }

        .menu-toggle {
            display: none;
            font-size: 28px;
            cursor: pointer;
            transition: color 0.3s ease;
        }

        /* 视频Banner区域 */
        .hero-video {
            position: relative;
            width: 100%;
            height: 100vh;
            min-height: 700px;
            overflow: hidden;
            background: #0a1c18;
            background-image: url('../img/VideoLoading2.png')
        }

        .hero-video video {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto;
            object-fit: cover;
            z-index: 0;
        }

        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(105deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.35) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: flex-start;
            color: white;
        }

        .hero-content h2 {
            font-size: 68px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -1px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }

        .hero-content p {
            font-size: 20px;
            max-width: 560px;
            margin-bottom: 35px;
            opacity: 0.95;
            font-weight: 400;
            text-shadow: 0 1px 8px rgba(0,0,0,0.2);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background-color: #FD4E2E;
            color: white;
            padding: 14px 36px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            border: none;
            cursor: pointer;
            box-shadow: 0 10px 20px -8px rgba(0,0,0,0.2);
        }

        .btn-primary:hover {
            background-color: #c97b3a;
            transform: translateY(-3px);
            box-shadow: 0 20px 25px -12px rgba(225,149,81,0.4);
        }

        .btn-outline-light {
            background: transparent;
            border: 2px solid white;
            box-shadow: none;
            margin-left: 16px;
        }

        .btn-outline-light:hover {
            background: white;
            color: #FD4E2E;
            border-color: white;
        }

        /* 通用区域样式 */
        .section {
            padding: 100px 0;
        }

        .section-light {
            background-color: #fefaf5;
        }

        .section-title {
            text-align: left;
            font-size: 44px;
            font-weight: 700;
            color: #1f2e2b;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }

        .section-sub {
            text-align: left;
            color: #6c7275;
            margin-bottom: 64px;
            font-size: 18px;
            max-width: 680px;
        }

        /* 产品网格 */
        /* ========== 产品中心分类模块 ========== */
        .product-category-section {
            width: 100%;
            background: #ffffff;
            padding: 100px 0;
            font-family: 'Inter', 'Segoe UI', 'Poppins', sans-serif;
        }

        .category-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .category-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .category-title {
            font-size: 44px;
            font-weight: 700;
            color: #1f2e2b;
            letter-spacing: -0.3px;
            margin-bottom: 16px;
        }

        .category-sub {
            font-size: 18px;
            color: #6c7275;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.5;
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        /* 分类卡片 */
        .category-card {
            position: relative;
            border-radius: 32px;
            overflow: hidden;
            cursor: pointer;
            background: #f8f8f8;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.05);
            transition: transform 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1), box-shadow 0.3s;
        }

        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 30px 45px -12px rgba(0, 0, 0, 0.15);
        }

        /* 图片容器 */
        .card-image {
            position: relative;
            width: 100%;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background-color: #eae2d7;
        }

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

        /* 鼠标悬停时图片放大 */
        .category-card:hover .card-image img {
            transform: scale(1.08);
        }

        /* 图片上的渐变遮罩层，让文字更清晰 */
        .card-image::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0,0,0,0.45) 0%, rgba(0,0,0,0.25) 100%);
            z-index: 1;
            pointer-events: none;
        }

        /* ========== 文字居中区域 ========== */
        .card-content-center {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            z-index: 2;
            text-align: center;
            padding: 20px;
            box-sizing: border-box;
            pointer-events: none; /* 让中央文字区域不干扰箭头点击，但文字本身可点需要单独设置 */
        }

        /* 分类名称 - 居中显示 */
        .category-name {
            color: white;
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.3px;
            text-shadow: 0 2px 15px rgba(0,0,0,0.4);
            margin: 0 0 12px 0;
            line-height: 1.2;
            pointer-events: auto;
            cursor: pointer;
        }

        /* 简短描述 */
        .category-desc {
            color: rgba(255,255,255,0.9);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 0;
            text-shadow: 0 1px 5px rgba(0,0,0,0.3);
            max-width: 80%;
            pointer-events: auto;
        }

        /* ========== 右下角箭头容器 ========== */
        .card-footer-arrow {
            position: absolute;
            bottom: 24px;
            right: 28px;
            z-index: 3;
            pointer-events: auto;
        }

        /* 箭头按钮：初始圆形，悬停向左扩展 */
        .arrow-btn {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: flex-end;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            height: 48px;
            width: 48px;
            border-radius: 60px;
            color: white;
            transition: all 0.35s cubic-bezier(0.2, 0.9, 0.4, 1.2);
            cursor: pointer;
            text-decoration: none;
            border: 1px solid rgba(255, 255, 255, 0.5);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            overflow: hidden;
        }

        .arrow-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform 0.25s ease;
            border-radius: 50%;
        }

        .arrow-icon i {
            font-size: 22px;
            transition: transform 0.25s ease;
        }

        .arrow-text {
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.25s ease, visibility 0.25s ease, margin 0.3s ease;
            color: white;
            margin-right: 0;
            letter-spacing: 0.5px;
        }

        /* 悬停扩展 */
        .arrow-btn:hover {
            width: 148px;
            background: #FD4E2E;
            border-color: #FD4E2E;
            box-shadow: 0 8px 20px rgba(225, 149, 81, 0.4);
        }

        .arrow-btn:hover .arrow-text {
            opacity: 1;
            visibility: visible;
            margin-right: 12px;
        }

        .arrow-btn:hover .arrow-icon i {
            transform: translateX(3px);
        }

        /* 卡片整体遮罩（用于点击跳转） */
        .category-link-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
            cursor: pointer;
        }

        /* 确保文字和箭头在遮罩之上 */
        .card-content-center {
            z-index: 2;
        }
        .card-footer-arrow {
            z-index: 3;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .category-grid { gap: 24px; }
            .category-title { font-size: 38px; }
            .category-name { font-size: 28px; }
            .category-desc { font-size: 13px; }
            .card-footer-arrow { bottom: 20px; right: 24px; }
            .arrow-btn { height: 44px; width: 44px; }
            .arrow-icon { width: 44px; height: 44px; }
            .arrow-icon i { font-size: 20px; }
            .arrow-btn:hover { width: 138px; }
            .arrow-text { font-size: 14px; }
        }

        @media (max-width: 768px) {
            .category-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .product-category-section { padding: 70px 0; }
            .category-title { font-size: 32px; }
            .category-sub { font-size: 16px; }
            .category-name { font-size: 24px; }
            .category-desc { font-size: 12px; }
            .card-footer-arrow { bottom: 16px; right: 20px; }
            .arrow-btn { height: 40px; width: 40px; }
            .arrow-icon { width: 40px; height: 40px; }
            .arrow-icon i { font-size: 18px; }
            .arrow-btn:hover { width: 128px; }
            .arrow-text { font-size: 13px; }
            .arrow-btn:hover .arrow-text { margin-right: 10px; }
        }

        @media (max-width: 580px) {
            .category-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
            .category-container { padding: 0 20px; }
            .category-name { font-size: 28px; }
        }

        /* 入场动画 */
        .category-card {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .category-card.visible {
            opacity: 1;
            transform: translateY(0);
        }
        /* ========== 品牌优势栏目 - 动态大背景切换 ========== */
        /* 整体容器：背景图默认为第一张，支持平滑切换 */
        .advantage-section {
            position: relative;
            width: 100%;
            background: url('../images/11.jpeg') center center / cover no-repeat;
            background-attachment: fixed;
            transition: background-image 0.5s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            padding: 100px 0;
            overflow: hidden;
            isolation: isolate;
        }

        /* 深色叠加层，增强文字可读性 */
        .advantage-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.40);
            z-index: 1;
            transition: background 0.3s;
        }

        /* 内容容器 */
        .advantage-container {
            position: relative;
            z-index: 2;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* 头部标题区域 */
        .advantage-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .advantage-title {
            font-size: 48px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            text-shadow: 0 2px 15px rgba(0,0,0,0.3);
        }

        .advantage-sub {
            font-size: 18px;
            color: rgba(255,255,255,0.85);
            max-width: 650px;
            margin: 0 auto;
            line-height: 1.5;
        }

        /* 四项优势网格布局 */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        /* 单个优势卡片：半透明磨砂玻璃效果 */
        .advantage-card {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border-radius: 32px;
            padding: 40px 28px;
            text-align: center;
            transition: all 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            border: 1px solid rgba(255, 255, 255, 0.25);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            cursor: pointer;
        }

        .advantage-card:hover {
            transform: translateY(-10px);
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(225, 149, 81, 0.6);
            box-shadow: 0 25px 40px rgba(0, 0, 0, 0.2);
        }

        /* 激活状态（高亮当前优势对应的卡片，增加视觉反馈） */
        .advantage-card.active {
            background: rgba(225, 149, 81, 0.25);
            border-color: #E19551;
            box-shadow: 0 20px 35px rgba(225, 149, 81, 0.2);
        }

        .advantage-icon {
            font-size: 56px;
            color: #FD4E2E;
            margin-bottom: 24px;
            transition: transform 0.3s;
        }

        .advantage-card:hover .advantage-icon {
            transform: scale(1.05);
        }

        .advantage-card h3 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #ffffff;
            letter-spacing: -0.2px;
        }

        .advantage-card p {
            font-size: 15px;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.85);
            margin: 0;
        }

        /* 响应式布局 */
        @media (max-width: 1024px) {
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .advantage-title {
                font-size: 40px;
            }
            .advantage-section {
                padding: 80px 0;
                background-attachment: scroll;
            }
        }

        @media (max-width: 768px) {
            .advantage-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .advantage-title {
                font-size: 32px;
            }
            .advantage-sub {
                font-size: 16px;
                padding: 0 16px;
            }
            .advantage-container {
                padding: 0 20px;
            }
            .advantage-card {
                padding: 32px 20px;
            }
            .advantage-card h3 {
                font-size: 24px;
            }
        }

        @media (max-width: 480px) {
            .advantage-section {
                padding: 60px 0;
            }
            .advantage-icon {
                font-size: 48px;
            }
        }

        /* 入场滚动动画 (Intersection Observer 配合) */
        .advantage-card {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease, background 0.2s, border 0.2s;
        }
        .advantage-card.visible {
            opacity: 1;
            transform: translateY(0);
        }
        /* 关于区域 */
        .about-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 70px;
            align-items: center;
        }

        .about-text {
            flex: 1.2;
        }

        .about-text h3 {
            font-size: 40px;
            font-weight: 700;
            margin-bottom: 24px;
            color: #1e2e2a;
            letter-spacing: -0.3px;
        }

        .about-text p {
            margin-bottom: 24px;
            color: #4a5b5e;
            line-height: 1.7;
            font-size: 17px;
        }

        .about-stats {
            display: flex;
            gap: 32px;
            margin-top: 32px;
        }

        .stat-item {
            text-align: left;
        }

        .stat-number {
            font-size: 34px;
            font-weight: 800;
            color: #FD4E2E;
        }

        .about-img {
            flex: 1;
            background: url("../images/about.png") no-repeat round;
            border-radius: 40px;
            height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 90px;
            color: #FD4E2E;
            box-shadow: 0 35px 50px -20px rgba(0, 0, 0, 0.1);
            transition: transform 0.4s;
        }

        .about-img:hover {
            transform: scale(1.02);
        }

       /* ========== 联系我们模块 - 大气现代设计（无表单版） ========== */
        .contact-section {
            width: 100%;
            background: linear-gradient(135deg, #fefaf5 0%, #ffffff 100%);
            padding: 100px 0;
            font-family: 'Inter', 'Segoe UI', 'Poppins', sans-serif;
            position: relative;
            overflow: hidden;
        }

        /* 装饰性背景元素 */
        .contact-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 80%;
            height: 150%;
            background: radial-gradient(circle, rgba(225,149,81,0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }

        .contact-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 60%;
            height: 100%;
            background: radial-gradient(circle, rgba(225,149,81,0.03) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .contact-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
            position: relative;
            z-index: 1;
        }

        /* 头部标题 */
        .contact-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .contact-title {
            font-size: 48px;
            font-weight: 800;
            color: #1f2e2b;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .contact-title::after {
            content: '';
            position: absolute;
            bottom: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: #FD4E2E;
            border-radius: 3px;
        }

        .contact-sub {
            font-size: 18px;
            color: #6c7275;
            max-width: 650px;
            margin: 24px auto 0;
            line-height: 1.6;
        }

        /* 联系信息卡片网格 - 更大气 */
        .contact-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-bottom: 60px;
        }

        /* 单个信息卡片 */
        .contact-card {
            background: #ffffff;
            border-radius: 28px;
            padding: 40px 28px;
            text-align: center;
            transition: all 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(225, 149, 81, 0.12);
            position: relative;
            overflow: hidden;
        }

        .contact-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: #FD4E2E;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

        .contact-card:hover::before {
            transform: scaleX(1);
        }

        .contact-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 30px 50px -15px rgba(225, 149, 81, 0.2);
            border-color: rgba(225, 149, 81, 0.25);
        }

        .card-icon {
            width: 72px;
            height: 72px;
            background: linear-gradient(135deg, #fef5ed 0%, #fae6d4 100%);
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            transition: all 0.3s;
        }

        .contact-card:hover .card-icon {
            background: #FD4E2E;
            transform: scale(1.05);
        }

        .card-icon i {
            font-size: 32px;
            color: #FD4E2E;
            transition: color 0.3s;
        }

        .contact-card:hover .card-icon i {
            color: white;
        }

        .contact-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: #1f2e2b;
            margin-bottom: 12px;
        }

        .contact-card p {
            color: #6c7275;
            font-size: 15px;
            line-height: 1.6;
            margin-bottom: 8px;
        }

        .contact-card a {
            color: #6c7275;
            text-decoration: none;
            transition: color 0.2s;
            font-size: 15px;
        }

        .contact-card a:hover {
            color: #FD4E2E;
        }

        /* 社交媒体区域 */
        .social-wrapper {
            text-align: center;
            margin-top: 40px;
            padding-top: 40px;
            border-top: 1px solid rgba(225, 149, 81, 0.15);
        }

        .social-title {
            font-size: 24px;
            font-weight: 700;
            color: #1f2e2b;
            margin-bottom: 28px;
        }

        .social-icons {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
        }

        .social-icon {
            width: 56px;
            height: 56px;
            background: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FD4E2E;
            font-size: 24px;
            transition: all 0.3s ease;
            text-decoration: none;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(225, 149, 81, 0.15);
        }

        .social-icon:hover {
            background: #FD4E2E;
            color: white;
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(225, 149, 81, 0.3);
        }

        /* 地图区域 */
        .map-wrapper {
            margin-top: 60px;
            border-radius: 32px;
            overflow: hidden;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.12);
        }

        .map-wrapper iframe {
            width: 100%;
            height: 380px;
            border: 0;
            display: block;
        }

        /* 响应式布局 */
        @media (max-width: 1024px) {
            .contact-grid {
                gap: 24px;
            }
            .contact-title {
                font-size: 40px;
            }
            .contact-card {
                padding: 32px 20px;
            }
            .card-icon {
                width: 64px;
                height: 64px;
            }
            .card-icon i {
                font-size: 28px;
            }
            .contact-card h3 {
                font-size: 20px;
            }
        }

        @media (max-width: 900px) {
            .contact-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .contact-section {
                padding: 70px 0;
            }
            .contact-container {
                padding: 0 24px;
            }
            .contact-title {
                font-size: 34px;
            }
            .contact-sub {
                font-size: 16px;
            }
            .contact-card {
                padding: 28px 16px;
            }
            .card-icon {
                width: 56px;
                height: 56px;
            }
            .card-icon i {
                font-size: 24px;
            }
            .contact-card h3 {
                font-size: 18px;
            }
            .contact-card p,
            .contact-card a {
                font-size: 13px;
            }
            .social-title {
                font-size: 20px;
            }
            .social-icon {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }
            .map-wrapper iframe {
                height: 280px;
            }
        }

        @media (max-width: 480px) {
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .contact-card {
                padding: 28px 20px;
            }
        }

        /* 入场动画 */
        .contact-card, .social-wrapper, .map-wrapper {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .contact-card.visible, .social-wrapper.visible, .map-wrapper.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* 卡片延迟动画 */
        .contact-card:nth-child(1) { transition-delay: 0.05s; }
        .contact-card:nth-child(2) { transition-delay: 0.1s; }
        .contact-card:nth-child(3) { transition-delay: 0.15s; }
        .contact-card:nth-child(4) { transition-delay: 0.2s; }
         /* ========== 精简底部 Footer - 极简大气 ========== */
        .site-footer {
            background: linear-gradient(135deg, #FD4E2E 0%, #FEE7C5 100%);
            color: #cddbd6;
            padding: 80px 0 50px;
            font-family: 'Inter', 'Segoe UI', 'Poppins', sans-serif;
            position: relative;
            overflow: hidden;
        }

        /* 装饰性光晕 */
        .site-footer::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 80%;
            height: 150%;
            background: radial-gradient(circle, rgba(225,149,81,0.08) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
            position: relative;
            z-index: 1;
            text-align: center;
        }

        /* Logo 区域 */
        .footer-logo {
            margin-bottom: 24px;
        }

        .footer-logo-img {
            height: 60px;
            width: auto;
            display: inline-block;
            transition: transform 0.3s ease;
        }

        .footer-logo-img:hover {
            transform: scale(1.02);
        }

        /* Slogan */
        .footer-slogan {
            font-size: 20px;
            font-weight: 400;
            letter-spacing: 1px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            line-height: 1.5;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 简单分隔线 */
        .footer-divider {
            width: 80px;
            height: 2px;
            background: rgba(225, 149, 81, 0.4);
            margin: 0 auto 32px;
            border-radius: 2px;
        }

        /* 版权信息 */
        .footer-copyright {
            font-size: 13px;
            color: rgba(205, 219, 214, 0.6);
            margin-top: 20px;
        }

        .footer-copyright a {
            color: rgba(205, 219, 214, 0.7);
            text-decoration: none;
            transition: color 0.2s;
        }

        .footer-copyright a:hover {
            color: #FD4E2E;
        }

        /* 可选：极简社交图标（非常克制，一行小图标） */
        .footer-social {
            margin-top: 28px;
            display: flex;
            justify-content: center;
            gap: 20px;
        }

        .footer-social a {
            color: rgba(205, 219, 214, 0.6);
            font-size: 18px;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .footer-social a:hover {
            color: #FD4E2E;
            transform: translateY(-3px);
        }

        /* 响应式 */
        @media (max-width: 768px) {
            .site-footer {
                padding: 60px 0 40px;
            }
            .footer-container {
                padding: 0 24px;
            }
            .footer-logo-img {
                height: 48px;
            }
            .footer-slogan {
                font-size: 16px;
                padding: 0 16px;
            }
            .footer-social {
                gap: 16px;
            }
            .footer-social a {
                font-size: 16px;
            }
        }

        @media (max-width: 480px) {
            .footer-logo-img {
                height: 42px;
            }
            .footer-slogan {
                font-size: 14px;
            }
            .footer-copyright {
                font-size: 11px;
            }
        }

        /* 入场淡入动画 */
        .footer-container {
            opacity: 0;
            transform: translateY(20px);
            animation: footerFadeIn 0.8s ease forwards;
        }

        @keyframes footerFadeIn {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 响应式 */
        @media (max-width: 992px) {
            .hero-content h2 { font-size: 52px; }
            .hero-video { min-height: 600px; height: 90vh; }
            .section { padding: 80px 0; }
            .section-title { font-size: 36px; }
        }

        @media (max-width: 768px) {
            .container { padding: 0 24px; }
            .main-nav {
                gap: 16px;
            }
            .menu-toggle {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: 85px;
                left: -100%;
                background: #ffffff;
                width: 75%;
                height: calc(100vh - 85px);
                flex-direction: column;
                padding: 40px 30px;
                gap: 30px;
                box-shadow: 5px 0 35px rgba(0,0,0,0.1);
                transition: 0.3s ease-in-out;
                z-index: 999;
                border-radius: 0 24px 24px 0;
            }
            .nav-menu.active { left: 0; }
            /* 移动端菜单内部文字颜色深色 */
            .nav-menu li a {
                color: #2d3e3b !important;
            }
            /* 移动端语言下拉调整 */
            .lang-dropdown {
                position: static;
            }
            .dropdown-content {
                right: auto;
                left: 0;
                top: 45px;
            }
            .hero-content h2 { font-size: 40px; }
            .hero-content p { font-size: 18px; }
            .hero-video { min-height: 500px; height: 80vh; }
            .about-wrapper { flex-direction: column; gap: 40px; }
            .about-text h3 { font-size: 32px; }
            .section-title { font-size: 32px; }
            .btn-primary { padding: 12px 28px; }
            .site-header:not(.scrolled) .menu-toggle {
                color: white;
            }
            .site-header.scrolled .menu-toggle {
                color: #FD4E2E;
            }
            .logo-img {
                height: 40px;
            }
        }

        @media (max-width: 480px) {
            .hero-content h2 { font-size: 34px; }
            .hero-video { min-height: 460px; }
            .product-card { padding: 28px 20px; }
        }

        /* 动效类 */
        .fade-up {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }


            /* 弹窗遮罩层 */
    .video-modal {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.85);
        backdrop-filter: blur(8px);
        z-index: 9999;
        justify-content: center;
        align-items: center;
        cursor: pointer;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .video-modal.show {
        display: flex;
        opacity: 1;
    }

    /* 弹窗内容容器 */
    .video-modal-content {
        position: relative;
        width: 90%;
        max-width: 1000px;
        border-radius: 24px;
        overflow: hidden;
        box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
        transform: scale(0.9);
        transition: transform 0.3s ease;
        cursor: default;
    }

    .video-modal.show .video-modal-content {
        transform: scale(1);
    }

    /* 关闭按钮 */
    .video-close {
        position: absolute;
        top: -45px;
        right: -10px;
        width: 40px;
        height: 40px;
        background: rgba(255, 255, 255, 0.2);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.3s;
        color: white;
        font-size: 24px;
        backdrop-filter: blur(4px);
        z-index: 10;
    }

    .video-close:hover {
        background: #FD4E2E;
        transform: rotate(90deg);
    }

    /* 视频容器 */
    .video-wrapper {
        position: relative;
        width: 100%;
        padding-bottom: 56.25%; /* 16:9 比例 */
        background: #000;
    }

    .video-wrapper iframe,
    .video-wrapper video {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        border: none;
    }

    /* 移动端适配 */
    @media (max-width: 768px) {
        .video-modal-content {
            width: 95%;
        }
        .video-close {
            top: -40px;
            right: -8px;
            width: 36px;
            height: 36px;
            font-size: 20px;
        }
    }

    /* 品牌故事按钮样式增强 */
    .btn-outline-light {
        background: transparent;
        border: 2px solid white;
        box-shadow: none;
        margin-left: 16px;
    }

    .btn-outline-light:hover {
        background: white;
        color: #FD4E2E;
        border-color: white;
    }