/* ==========================================================================
           1. 承袭全局核心变量与基础样式
           ========================================================================== */
        :root {
            --primary-color: #0056b3;
            --secondary-color: #ff6600;
            --text-dark: #333333;
            --bg-light: #f8f9fa;
            --border-color: #e0e0e0;
        }

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

        html { 
            scroll-behavior: smooth; 
            scroll-padding-top: 130px; 
        }

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

        .container { 
            width: 100%; 
            max-width: 1200px; 
            margin: 0 auto; 
            padding: 0 20px; 
        }
        
        /* 按钮公用样式 */
        .btn { 
            display: inline-block; 
            background: var(--secondary-color); 
            color: #fff; 
            padding: 12px 28px; 
            text-decoration: none; 
            border-radius: 4px; 
            font-weight: bold; 
            transition: background 0.3s; 
            text-align: center; 
            font-size: 1rem; 
            border: none; 
            cursor: pointer; 
        }
        .btn:hover { 
            background: #e05500; 
        }

        /* ==========================================================================
           2. Header 头部样式
           ========================================================================== */
        header { 
            background: #fff; 
            box-shadow: 0 2px 10px rgba(0,0,0,0.05); 
            position: sticky; 
            top: 0; 
            z-index: 1000; 
        }
        .header-top { 
            display: flex; 
            justify-content: space-between; 
            align-items: center; 
            padding: 15px 0; 
            border-bottom: 1px solid #f1f3f5; 
        }
        .logo { 
            flex: 0 0 auto; 
        }
		
		        .bt { font-size: 1.5rem; color: var(--primary-color); line-height: 1.2; font-weight: 700; }
		.logo a {text-decoration: none;}
		
        .logo h1 { 
            font-size: 1.5rem; 
            color: var(--primary-color); 
            line-height: 1.2; 
            font-weight: 700; 
        }
        .logo span { 
            font-size: 0.85rem; 
            color: #666; 
            display: block; 
            margin-top: 4px; 
            letter-spacing: 1px; 
        }
        .header-rt { 
            text-align: right; 
            flex: 0 0 auto; 
        }
        .hotline { 
            font-size: 1.4rem; 
            color: var(--secondary-color); 
            font-weight: bold; 
            text-decoration: none; 
            display: block; 
        }
        .main-nav { 
            background: #fff; 
            padding: 10px 0; 
            display: block; 
        }
        .nav-list { 
            display: flex; 
            list-style: none; 
            gap: 40px; 
            justify-content: center; 
            align-items: center; 
        }
        .nav-list a { 
            text-decoration: none; 
            color: #495057; 
            font-weight: 500; 
            font-size: 1.05rem; 
            transition: all 0.2s; 
            padding: 5px 0; 
            white-space: nowrap; 
        }
        .nav-list a:hover, .nav-list .active { 
            color: var(--primary-color); 
            border-bottom: 2px solid var(--primary-color); 
        }
        .menu-toggle, .menu-btn { 
            display: none; 
        }

        /* ==========================================================================
           3. 面包屑导航样式
           ========================================================================== */
        .breadcrumb { 
            background: var(--bg-light); 
            padding: 12px 0; 
            border-bottom: 1px solid var(--border-color); 
            font-size: 0.9rem; 
        }
        .breadcrumb-list { 
            display: flex; 
            list-style: none; 
            gap: 8px; 
            color: #6c757d; 
        }
        .breadcrumb-list a { 
            color: #495057; 
            text-decoration: none; 
        }
        .breadcrumb-list a:hover { 
            color: var(--primary-color); 
            text-decoration: underline; 
        }
        .breadcrumb-list li:not(:last-child)::after { 
            content: '/'; 
            margin-left: 8px; 
            color: #adb5bd; 
        }
        .breadcrumb-list li:last-child { 
            color: var(--primary-color); 
            font-weight: 500; 
        }

        /* ==========================================================================
           4. 公司简介专属宽屏排版样式
           ========================================================================== */
        .about-wrapper {
            padding: 40px 0 70px;
            background: #fff;
        }

        /* 统一大标题组件 */
        .section-title {
            font-size: 1.8rem;
            color: #111;
            margin-bottom: 30px;
            position: relative;
            padding-bottom: 10px;
            font-weight: bold;
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background: var(--primary-color);
        }

        /* 模块一：图文混排 */
        .intro-block {
            display: flex;
            gap: 40px;
            align-items: center;
            margin-bottom: 50px;
        }
        .intro-text {
            flex: 1;
            font-size: 1.05rem;
            color: #444;
            line-height: 1.8;
            text-align: justify;
        }
        .intro-text p {
            margin-bottom: 15px;
        }
        .intro-text strong {
            color: var(--primary-color);
        }
        
        /* 数字化荣誉网格 */
        .honor-counter-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 40px 0;
            background: var(--bg-light);
            padding: 30px 20px;
            border-radius: 6px;
            border-left: 4px solid var(--primary-color);
        }
        .honor-counter-item {
            text-align: center;
        }
        .honor-counter-item .num {
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--secondary-color);
            line-height: 1.2;
        }
        .honor-counter-item .unit {
            font-size: 1.1rem;
        }
        .honor-counter-item .label {
            font-size: 0.9rem;
            color: #666;
            margin-top: 5px;
        }

        /* 模块二：荣誉资质标签条 */
        .tag-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 25px;
        }
        .tag-wall span {
            background: #e8f4ff;
            color: var(--primary-color);
            padding: 6px 16px;
            border-radius: 4px;
            font-size: 0.95rem;
            font-weight: 500;
            border: 1px solid #d0e7ff;
        }

        /* 模块三：核心产品范围（分类区块） */
        .product-scope-box {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 30px;
            margin-bottom: 50px;
        }
        .scope-category {
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px dashed var(--border-color);
        }
        .scope-category:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        .scope-title {
            font-size: 1.1rem;
            color: var(--primary-color);
            font-weight: bold;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .scope-title::before {
            content: '■';
            font-size: 0.8rem;
            color: var(--secondary-color);
        }
        .scope-details {
            font-size: 0.95rem;
            color: #555;
            line-height: 1.7;
        }

        /* 模块四：世界500强客户墙 */
        .client-section {
            margin-top: 40px;
        }
        .client-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
            margin-top: 20px;
        }
        .client-item {
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 15px 10px;
            text-align: center;
            font-size: 0.95rem;
            color: #495057;
            font-weight: 500;
            border-radius: 4px;
            transition: all 0.2s;
        }
        .client-item:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            box-shadow: 0 4px 12px rgba(0, 86, 179, 0.08);
        }

        /* 底部通栏转化条 */
        .bottom-cta-banner {
            background: linear-gradient(135deg, #0056b3 0%, #003d82 100%);
            color: #fff;
            border-radius: 6px;
            padding: 25px 30px;
            margin-top: 50px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: 0 4px 15px rgba(0, 86, 179, 0.1);
        }
        .bottom-cta-banner h4 { font-size: 1.4rem; margin-bottom: 6px; letter-spacing: 0.5px; }
        .bottom-cta-banner p { font-size: 0.95rem; color: #e8f4ff; }
        .bottom-cta-banner .btn { flex: 0 0 auto; margin-left: 20px; box-shadow: 0 4px 10px rgba(255, 102, 0, 0.3); }

        /* ==========================================================================
           5. Footer 页脚样式
           ========================================================================== */
        footer { 
            background: #212529; 
            color: #b5b9bd; 
            padding: 40px 0; 
            text-align: center; 
            font-size: 0.9rem; 
            line-height: 1.8; 
        }
        footer p { 
            margin-bottom: 8px; 
        }
        footer p strong { 
            color: #fff; 
        }
        footer a { 
            color: #fff; 
            text-decoration: none; 
        }
        footer a:hover { 
            text-decoration: underline; 
        }

        /* ==========================================================================
           6. 严格响应式适配断点
           ========================================================================== */
        @media (max-width: 992px) {
            .nav-list { gap: 20px; }
            .logo h1 { font-size: 1.3rem; }
            .hotline { font-size: 1.2rem; }
            .intro-block { flex-direction: column; gap: 25px; }
            .honor-counter-grid { grid-template-columns: repeat(2, 1fr); gap: 25px; }
            .client-grid { grid-template-columns: repeat(3, 1fr); }
        }

        @media (max-width: 768px) {
            html { scroll-padding-top: 90px; }
            .header-top { padding: 10px 0; position: relative; }
            .logo h1 { font-size: 1.1rem; }
            .logo span { font-size: 0.75rem; letter-spacing: 0; }
            .header-rt { margin-right: 45px; text-align: right; }
            .hotline { font-size: 1rem; }
            
            .menu-btn { 
                display: block; 
                position: absolute; 
                right: 20px; 
                top: 50%; 
                transform: translateY(-50%); 
                cursor: pointer; 
                padding: 10px 0; 
                z-index: 1002; 
            }
            .menu-btn .icon-bar { 
                display: block; 
                width: 22px; 
                height: 2px; 
                background: #333; 
                margin: 4px 0; 
                transition: all 0.2s; 
            }
            
            .main-nav { 
                display: block; 
                position: absolute; 
                top: 100%; 
                left: 0; 
                right: 0; 
                background: #fff; 
                border-top: 1px solid var(--border-color); 
                border-bottom: 2px solid var(--primary-color); 
                max-height: 0; 
                overflow: hidden; 
                opacity: 0; 
                transition: all 0.3s ease-in-out; 
                padding: 0; 
            }
            .nav-list { flex-direction: column; gap: 0; width: 100%; padding: 10px 0; }
            .nav-list li { width: 100%; text-align: center; }
            .nav-list a { display: block; padding: 12px 0; font-size: 1rem; border-bottom: 1px solid #f8f9fa; }
            .nav-list li:last-child a { border-bottom: none; }
            .nav-list a:hover { border-bottom: none; background: var(--bg-light); }
            
            .menu-toggle:checked ~ .main-nav { max-height: 400px; opacity: 1; }
            .menu-toggle:checked ~ .menu-btn .icon-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
            .menu-toggle:checked ~ .menu-btn .icon-bar:nth-child(2) { opacity: 0; }
            .menu-toggle:checked ~ .menu-btn .icon-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

            .section-title { font-size: 1.5rem; }
            .bottom-cta-banner { flex-direction: column; text-align: center; gap: 15px; }
            .bottom-cta-banner .btn { margin-left: 0; width: 100%; }
            .client-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
        }

        @media (max-width: 414px) {
            .header-rt p { display: none; }
            .logo h1 { font-size: 1rem; }
            .honor-counter-grid { grid-template-columns: 1fr; gap: 20px; }
            .client-grid { grid-template-columns: 1fr; }
        }