/* 自定义样式 - 核心修改：全局字体改为微软雅黑，优化排版基线 */
        :root {
            --primary-dark: #0F172A;
            --primary-blue: #1E40AF;
            --accent-yellow: #FBBF24;
            --light-gray: #F1F5F9;
            --danger-red: #E53E3E;
            --text-muted: #64748B;
            --kh-primary: #1A5F7A; /* 康辉纺织主色调-藏青蓝 */
            --kh-accent: #FFB84C; /* 康辉纺织辅助色-暖黄 */
        }
        body {
            font-family: "Microsoft YaHei", "微软雅黑", Arial, sans-serif; /* 改为微软雅黑 */
            line-height: 1.6; /* 优化行高提升可读性 */
            color: var(--primary-dark);
            margin: 0;
            padding: 0;
        }

        /* 导航栏优化 - 新增二级下拉菜单样式，Logo重新设计 */
        .navbar {
            background-color: #fff;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            padding: 0.8rem 0; /* 优化导航栏内边距 */
            position: relative;
            z-index: 1000;
        }
        /* 康辉纺织Logo样式重构 */
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--kh-primary);
            line-height: 1; /* 对齐品牌名和副标题 */
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .navbar-brand span {
            color: var(--kh-accent);
        }
        .navbar-brand + .text-muted {
            font-size: 0.85rem;
            margin-top: 0.2rem;
            display: inline-block; /* 副标题垂直对齐 */
            color: var(--text-muted);
        }
        .nav-link {
            color: var(--primary-dark);
            margin: 0 0.4rem; /* 缩小导航项间距，适配移动端 */
            font-weight: 500;
            padding: 0.5rem 0.7rem !important; /* 优化点击区域 */
            transition: color 0.3s ease; /* 过渡效果 */
        }
        .nav-link.active {
            color: var(--kh-primary) !important;
        }
        .nav-link:hover:not(.active) {
            color: var(--kh-accent) !important;
        }
        /* 二级下拉菜单样式 */
        .dropdown-menu {
            border: none;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            border-radius: 8px;
            padding: 0.8rem 0;
            margin-top: 0.2rem !important;
        }
        .dropdown-item {
            padding: 0.6rem 1.5rem;
            font-weight: 500;
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        .dropdown-item:hover {
            background-color: var(--light-gray);
            color: var(--kh-primary);
        }
        /* 搜索按钮样式优化 */
        .search-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            transition: background-color 0.3s ease;
        }
        .search-link:hover {
            background-color: var(--light-gray);
        }

        /* 响应式区间定义 - 分屏适配 */
        /* 英雄区优化（原GRS认证区改为全屏轮播） */
        .hero-section {
            padding: 0;
            margin: 0;
            background-color: #F8FAFC;
            width: 100%;
            position: relative;
        }
        /* GRS认证全屏轮播样式 */
        .grs-carousel {
            width: 100%;
            max-width: 100%;
            margin: 0;
            border-radius: 0;
            overflow: hidden;
            box-shadow: none;
        }
        .grs-carousel .carousel-inner {
            height: clamp(300px, 50vw, 600px); /* 适配高度，大屏对应1920宽度时高度约600px */
        }
        .grs-carousel .carousel-item img {
            width: 100%;
            height: 100%;
            object-fit: cover; /* 保证图片铺满容器，裁剪多余部分 */
            min-width: 1920px; /* 强制最小宽度1920px，保证全屏显示 */
            object-position: center; /* 居中显示图片核心内容 */
        }
        /* 轮播指示器样式优化 - 移至底部偏上位置 */
        .grs-carousel .carousel-indicators {
            bottom: 20px;
        }
        .grs-carousel .carousel-indicators button {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: rgba(255,255,255,0.7);
            border: none;
            margin: 0 4px;
            opacity: 0.7;
        }
        .grs-carousel .carousel-indicators button.active {
            background-color: var(--kh-accent);
            opacity: 1;
        }
        /* 轮播控制按钮样式优化 - 全屏适配 */
        .grs-carousel .carousel-control-prev,
        .grs-carousel .carousel-control-next {
            width: 60px;
            height: 60px;
            background-color: rgba(255,255,255,0.5);
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
            margin: 0 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.3s ease;
        }
        .grs-carousel .carousel-control-prev:hover,
        .grs-carousel .carousel-control-next:hover {
            background-color: rgba(255,255,255,0.8);
        }
        .grs-carousel .carousel-control-prev-icon,
        .grs-carousel .carousel-control-next-icon {
            width: 24px;
            height: 24px;
            background-color: var(--kh-primary);
            mask-size: 24px;
            -webkit-mask-size: 24px;
        }
        .grs-carousel .carousel-control-prev-icon {
            mask-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e");
            -webkit-mask-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e");
        }
        .grs-carousel .carousel-control-next-icon {
            mask-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e");
            -webkit-mask-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e");
        }
        /* 轮播标题描述 - 叠加在轮播图下方，全屏宽度 */
        .grs-desc {
            text-align: center;
            width: 100%;
            padding: 3rem 1rem;
            background-color: #F8FAFC;
            margin: 0;
        }
        .grs-desc h2 {
            color: var(--kh-primary);
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            margin-bottom: 1rem;
        }
        .grs-desc p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--text-muted);
            max-width: 1200px;
            margin: 0 auto;
            line-height: 1.8;
        }

        /* 工厂区优化 - 替换为视频，新增介绍文字 */
        .factory-section {
            background-color: var(--primary-dark);
            color: #fff;
            padding: clamp(2rem, 4vw, 3rem) 0;
        }
        /* 工厂视频容器样式 */
        .factory-video-container {
            width: 100%;
            max-width: 1000px;
            margin: 0 auto 1.5rem;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }
        .factory-video {
            width: 100%;
            height: clamp(200px, 40vw, 500px);
            border: none;
        }
        /* 工厂介绍文字 */
        .factory-desc {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 2rem;
            font-size: clamp(0.9rem, 1.8vw, 1.1rem);
            line-height: 1.8;
            opacity: 0.9;
        }
        .factory-stats {
            text-align: center;
            margin: clamp(1rem, 2vw, 1.5rem) 0;
        }
        .factory-stats h3 {
            font-size: clamp(1.5rem, 3vw, 2rem); /* 响应式字号 */
            font-weight: 700;
            color: var(--kh-accent);
            margin-bottom: 0.5rem;
        }
        .factory-stats p {
            font-size: clamp(0.8rem, 1.5vw, 0.9rem);
            opacity: 0.8;
            margin: 0;
        }

        /* 认证区（原独立认证区保留，若不需要可删除） */
        .cert-section {
            padding: clamp(2rem, 4vw, 3rem) 0;
            background-color: #fff;
        }
        .cert-card {
            border: 1px solid #E2E8F0;
            padding: clamp(0.8rem, 2vw, 1rem);
            border-radius: 8px;
            margin: clamp(0.8rem, 2vw, 1rem) 0;
            transition: box-shadow 0.3s ease; /* 悬停阴影 */
        }
        .cert-card:hover {
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
        }

        /* 产品区优化 */
        .product-section {
            padding: clamp(2rem, 4vw, 3rem) 0;
            background-color: var(--kh-primary);
            color: #fff;
        }
        .product-card {
            background-color: #fff;
            color: var(--primary-dark);
            border-radius: 8px;
            overflow: hidden;
            text-align: center;
            padding-bottom: clamp(0.8rem, 2vw, 1rem);
            margin: clamp(0.8rem, 2vw, 1rem) 0;
            box-shadow: 0 2px 8px rgba(0,0,0,0.06);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .product-card img {
            width: 100%;
            height: clamp(140px, 20vw, 180px); /* 响应式图片高度 */
            object-fit: cover;
        }
        .sample-btn {
            background-color: var(--kh-accent);
            border: none;
            padding: clamp(0.4rem, 1.5vw, 0.5rem) clamp(0.8rem, 2vw, 1rem);
            border-radius: 4px;
            font-weight: 600;
            transition: background-color 0.3s ease;
            margin-top: 0.5rem;
        }
        .sample-btn:hover {
            background-color: #FF9F1C; /* 加深黄色，提升交互反馈 */
            color: #fff;
        }

        /* 页脚优化 - 响应式列布局，排版美化 */
        .footer-section {
            background-color: var(--primary-dark);
            color: #fff;
            padding: clamp(3rem, 5vw, 4rem) 0 clamp(1.5rem, 3vw, 2rem);
        }
        .footer-col {
            margin-bottom: clamp(1.5rem, 3vw, 2rem); /* 移动端列间距 */
        }
        .footer-col h5 {
            margin-bottom: clamp(1rem, 2vw, 1.5rem);
            font-weight: 700;
            color: var(--kh-accent);
            font-size: 1.1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: clamp(0.6rem, 1.5vw, 0.8rem);
        }
        .footer-col ul li a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .subscribe-wrap {
            display: flex;
            align-items: center;
            width: 100%;
            max-width: 400px; /* 限制订阅框宽度 */
        }
        .subscribe-input {
            padding: clamp(0.4rem, 1.5vw, 0.5rem);
            border-radius: 4px 0 0 4px;
            border: none;
            flex: 1; /* 自适应宽度 */
            min-width: 120px; /* 移动端最小宽度 */
            font-family: "Microsoft YaHei", sans-serif;
        }
        .subscribe-btn {
            background-color: var(--danger-red);
            color: #fff;
            border: none;
            padding: clamp(0.4rem, 1.5vw, 0.5rem) clamp(0.8rem, 2vw, 1rem);
            border-radius: 0 4px 4px 0;
            white-space: nowrap; /* 按钮文字不换行 */
            transition: background-color 0.3s ease;
        }
        .subscribe-btn:hover {
            background-color: #D13030;
        }
        .copyright {
            text-align: center;
            margin-top: clamp(1.5rem, 3vw, 2rem);
            opacity: 0.7;
            font-size: clamp(0.8rem, 1.5vw, 0.9rem);
            padding-top: 1rem;
            border-top: 1px solid rgba(255,255,255,0.1); /* 增加分割线 */
        }

        /* 通用排版优化 */
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.2; /* 标题行高优化 */
            margin-bottom: 0.8rem;
            font-weight: 700;
        }
        p {
            margin-bottom: 0.8rem;
            color: var(--text-muted);
        }
        .text-muted {
            color: var(--text-muted) !important;
        }
        /* 修复原代码中无效的opacity类 */
        .text-opacity-80 {
            opacity: 0.8;
        }

        /* 适配移动端 */
        @media (max-width: 991.98px) {
            .dropdown-menu {
                box-shadow: none;
                border-radius: 0;
                padding: 0;
            }
            .dropdown-item {
                padding: 0.5rem 1rem;
            }
            /* 移动端轮播控制按钮缩小 */
            .grs-carousel .carousel-control-prev,
            .grs-carousel .carousel-control-next {
                width: 45px;
                height: 45px;
                margin: 0 1rem;
            }
            /* 移动端轮播指示器缩小 */
            .grs-carousel .carousel-indicators button {
                width: 10px;
                height: 10px;
            }
        }

        @media (max-width: 767.98px) {
            .grs-carousel .carousel-inner {
                height: clamp(200px, 60vw, 400px); /* 移动端轮播高度适配 */
            }
            .grs-desc {
                padding: 2rem 1rem;
            }
        }