/* 
         * ===========================================
         * B2B Enterprise Style - Light Theme with Orange #ff770f
         * ===========================================
         */
        :root {
            --primary-orange: #ff770f;
            --primary-orange-dark: #e66a00;
            --primary-orange-light: #ff9640;
            
            --bg-white: #ffffff;
            --bg-light: #f8f9fa;
            --bg-light-gray: #f0f2f5;
            --bg-card: #ffffff;
            --bg-card-hover: #f5f5f5;
            
            --text-dark: #1a1a1a;
            --text-gray: #666666;
            --text-light: #e0e0e0;
            --text-muted: #999999;
            
            --border-color: #e5e7eb;
            --border-light: #f0f0f0;
            
            --accent-green: #10b981;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* ===========================================
         * Hero Section
         * ===========================================
         */
        .hero {
            padding: 120px 80px 100px;
            /* 
             * Hero 背景图片上传说明：
             * 选项1：使用渐变背景（当前）
             * 选项2：使用图片背景（取消注释并替换URL）
             */
            /* 
             * 选项2：图片背景
             * background-image: url('你的图片URL');
             * background-size: cover;
             * background-position: center;
             * background-repeat: no-repeat;
             */
            background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light-gray) 100%);
            position: relative;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-color), transparent);
        }

        .hero-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }

        .hero-text {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 32px;
            font-size: 14px;
        }

        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .breadcrumb a:hover {
            color: var(--primary-orange-light);
        }

        .breadcrumb span {
            color: var(--text-muted);
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 119, 15, 0.1);
            border: 1px solid var(--primary-orange);
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary-orange-light);
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 2px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 24px;
            line-height: 1.1;
        }

        .hero h1 span {
            color: var(--primary-orange-light);
        }

        .hero-description {
            font-size: 18px;
            color: var(--text-gray);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            margin-bottom: 48px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: var(--primary-orange);
            color: white;
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(255, 119, 15, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-orange-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 119, 15, 0.4);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: transparent;
            color: var(--text-dark);
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            border: 2px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            border-color: var(--primary-orange);
            color: var(--primary-orange);
            background: rgba(255, 119, 15, 0.05);
        }

        /* Hero Stats */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 24px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            border-color: var(--primary-orange);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-number span {
            color: var(--primary-orange-light);
        }

        .stat-label {
            font-size: 12px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* Hero Visual */
        .hero-visual {
            position: relative;
        }

        .hero-image {
            width: 100%;
            height: 450px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            position: relative;
            overflow: hidden;
        }

        .hero-image::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 200px;
            height: 200px;
            background: var(--primary-orange);
            opacity: 0.1;
            border-radius: 50%;
            filter: blur(80px);
        }

        /* ===========================================
         * Features Section
         * ===========================================
         */
        .features-section {
            padding: 100px 80px;
            background: var(--bg-white);
        }

        .section-container {
            max-width: 1400px;
            margin: 0 auto;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-orange-light);
            text-transform: uppercase;
            letter-spacing: 3px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 42px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
        }

        .section-description {
            font-size: 18px;
            color: var(--text-gray);
            max-width: 600px;
            margin: 0 auto;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 32px;
            transition: all 0.3s ease;
        }

        .feature-card:hover {
            border-color: var(--primary-orange);
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(255, 119, 15, 0.1);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            background: rgba(255, 119, 15, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-orange);
            margin-bottom: 24px;
        }

        .feature-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        .feature-description {
            font-size: 15px;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* ===========================================
         * Scene Selection + Specs - Combined
         * ===========================================
         */
        .scenes-section {
            padding: 100px 80px;
            background: var(--bg-light-gray);
        }

        .scenes-wrapper {
            margin-top: 60px;
        }

        /* Scene Tabs */
        .scene-tabs {
            display: flex;
            gap: 4px;
            margin-bottom: 32px;
            border-bottom: 1px solid var(--border-color);
        }

        .scene-tab {
            padding: 16px 24px;
            background: transparent;
            border: none;
            border-bottom: 2px solid transparent;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: -1px;
        }

        .scene-tab:hover {
            color: var(--text-dark);
        }

        .scene-tab.active {
            color: var(--primary-orange-light);
            border-bottom-color: var(--primary-orange);
        }

        /* Scene Content */
        .scene-content-wrapper {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            position: relative;
            min-height: 450px;
        }

        .scene-detail {
            display: grid;
            grid-template-columns: 1fr 1fr;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.4s ease, visibility 0.4s;
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
        }

        .scene-detail.active {
            opacity: 1;
            visibility: visible;
            position: relative;
        }

        .scene-detail-image {
            position: relative;
            min-height: 450px;
        }

        .scene-image {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }

        /* Scene Images */
        .scene-image.warehouse {
            background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
        }

        .scene-image.factory {
            background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
        }

        .scene-image.stadium {
            background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
        }

        .scene-image.office {
            background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
        }

        .scene-detail-info {
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .scene-detail-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
        }

        .scene-detail-description {
            font-size: 16px;
            color: var(--text-gray);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        /* Specs Mini Grid */
        .specs-mini-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .spec-mini-card {
            background: var(--bg-dark);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .spec-mini-card:hover {
            border-color: var(--primary-orange);
        }

        .spec-mini-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary-orange-light);
            margin-bottom: 4px;
        }

        .spec-mini-label {
            font-size: 12px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* ===========================================
         * Benefits Section
         * ===========================================
         */
        .benefits-section {
            padding: 100px 80px;
            background: var(--bg-dark);
        }

        .benefits-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }

        .benefits-content {
            padding-right: 40px;
        }

        .benefits-title {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 24px;
        }

        .benefits-description {
            font-size: 17px;
            color: var(--text-gray);
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .benefits-list {
            list-style: none;
        }

        .benefits-item {
            display: flex;
            gap: 16px;
            margin-bottom: 24px;
            padding: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            transition: all 0.3s ease;
        }

        .benefits-item:hover {
            border-color: var(--primary-orange);
            transform: translateX(8px);
        }

        .benefit-icon {
            width: 48px;
            height: 48px;
            background: rgba(16, 185, 129, 0.15);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-green);
            flex-shrink: 0;
        }

        .benefit-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .benefit-content p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
        }

        .benefits-visual {
            position: relative;
        }

        .benefits-image {
            width: 100%;
            height: 500px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            position: relative;
            overflow: hidden;
        }

        .benefits-image::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 250px;
            height: 250px;
            background: var(--primary-orange);
            opacity: 0.1;
            border-radius: 50%;
            filter: blur(100px);
        }

        /* ===========================================
         * CTA Section
         * ===========================================
         */
        .cta-section {
            padding: 120px 80px;
            background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-light-gray) 100%);
            text-align: center;
        }

        .cta-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 20px;
        }

        .cta-description {
            font-size: 18px;
            color: var(--text-gray);
            margin-bottom: 40px;
        }

        .cta-button {
            display: inline-block;
            padding: 18px 48px;
            background: var(--primary-orange);
            color: white;
            text-decoration: none;
            border-radius: 10px;
            font-weight: 700;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(255, 119, 15, 0.35);
        }

        .cta-button:hover {
            background: var(--primary-orange-dark);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(255, 119, 15, 0.45);
        }

        /* ===========================================
         * Responsive Design - 移动端适配
         * ===========================================
         */
        
        /* 超大屏幕 (1400px以上) */
        @media (min-width: 1400px) {
            .hero h1 {
                font-size: 64px;
            }
            
            .section-title {
                font-size: 48px;
            }
            
            .cta-title {
                font-size: 52px;
            }
        }

        /* 大屏幕 (1200px - 1399px) */
        @media (max-width: 1200px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .hero h1 {
                font-size: 48px;
            }
            
            .hero-description {
                font-size: 18px;
            }
            
            .section-title {
                font-size: 42px;
            }
            
            .benefits-title {
                font-size: 36px;
            }
            
            .cta-title {
                font-size: 44px;
            }
            
            .scene-detail-title {
                font-size: 26px;
            }
        }

        /* 平板 (992px - 1199px) */
        @media (max-width: 992px) {
            .hero {
                padding: 100px 40px 80px;
            }

            .hero-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero h1 {
                font-size: 42px;
            }

            .hero-description {
                font-size: 17px;
            }

            .hero-stats {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .hero-image {
                height: 350px;
            }

            .benefits-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .benefits-content {
                padding-right: 0;
            }

            .scene-detail {
                grid-template-columns: 1fr;
                min-height: auto;
            }

            .scene-detail-image {
                min-height: 300px;
            }

            .scene-detail-info {
                padding: 40px;
            }

            .scene-detail-title {
                font-size: 26px;
            }

            .scene-detail-description {
                font-size: 16px;
                margin-bottom: 28px;
            }

            .specs-mini-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .spec-mini-card {
                padding: 20px;
            }

            .spec-mini-value {
                font-size: 28px;
            }

            .spec-mini-label {
                font-size: 12px;
            }

            .scene-tabs {
                flex-wrap: wrap;
                gap: 12px;
            }

            .scene-tab {
                padding: 12px 20px;
                font-size: 14px;
            }

            .features-section,
            .scenes-section,
            .benefits-section,
            .specs-section,
            .cta-section {
                padding: 80px 40px;
            }

            .specs-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        /* 大手机 (768px - 991px) */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 36px;
            }

            .hero-description {
                font-size: 16px;
            }

            .hero-badge {
                font-size: 11px;
                padding: 5px 12px;
            }

            .hero-buttons {
                flex-direction: column;
                gap: 16px;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
                font-size: 14px;
            }

            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }

            .stat-card {
                padding: 20px;
            }

            .stat-number {
                font-size: 28px;
            }

            .stat-label {
                font-size: 11px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .feature-card {
                padding: 24px;
            }

            .feature-title {
                font-size: 18px;
            }

            .feature-description {
                font-size: 14px;
            }

            .scene-tabs {
                flex-direction: column;
                border-bottom: none;
                gap: 8px;
            }

            .scene-tab {
                padding: 12px 16px;
                border: 1px solid var(--border-color);
                border-radius: 8px;
                text-align: center;
            }

            .scene-tab.active {
                border-color: var(--primary-orange);
                background: rgba(255, 119, 15, 0.1);
                border-bottom: 1px solid var(--primary-orange);
            }

            .scene-detail {
                grid-template-columns: 1fr;
            }

            .scene-detail-info {
                padding: 32px;
            }

            .scene-detail-title {
                font-size: 24px;
            }

            .scene-detail-description {
                font-size: 15px;
                margin-bottom: 24px;
            }

            .specs-mini-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .spec-mini-card {
                padding: 16px;
            }

            .spec-mini-value {
                font-size: 26px;
            }

            .spec-mini-label {
                font-size: 11px;
            }

            .specs-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .spec-value {
                font-size: 32px;
            }

            .spec-label {
                font-size: 12px;
            }

            .benefits-title {
                font-size: 32px;
            }

            .benefits-description {
                font-size: 16px;
            }

            .benefits-item {
                padding: 20px;
            }

            .benefit-content h4 {
                font-size: 16px;
            }

            .benefit-content p {
                font-size: 13px;
            }

            .cta-title {
                font-size: 32px;
            }

            .cta-description {
                font-size: 16px;
            }

            .cta-button {
                padding: 16px 32px;
                font-size: 15px;
                display: block;
                text-align: center;
            }
        }

        /* 手机 (480px - 767px) */
        @media (max-width: 480px) {
            .hero {
                padding: 90px 24px 60px;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero-stats {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .hero-image {
                height: 250px;
            }

            .scene-detail-image {
                min-height: 200px;
            }

            .scene-detail-info {
                padding: 24px;
            }

            .scene-detail-title {
                font-size: 22px;
                margin-bottom: 12px;
            }

            .scene-detail-description {
                font-size: 14px;
                line-height: 1.6;
                margin-bottom: 20px;
            }

            .specs-mini-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .spec-mini-card {
                padding: 16px;
            }

            .spec-mini-value {
                font-size: 24px;
            }

            .spec-mini-label {
                font-size: 11px;
            }

            .specs-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .benefits-image {
                height: 250px;
            }

            .benefits-list {
                gap: 16px;
            }

            .benefits-item {
                padding: 16px;
            }

            .cta-section {
                padding: 60px 24px;
            }

            .cta-button {
                width: 100%;
                padding: 16px 24px;
            }
        }

        /* 小屏幕优化 (320px - 479px) */
        @media (max-width: 320px) {
            .hero h1 {
                font-size: 26px;
            }

            .hero-description {
                font-size: 14px;
            }

            .section-title {
                font-size: 22px;
            }

            .features-section,
            .scenes-section,
            .benefits-section,
            .specs-section {
                padding: 50px 16px;
            }

            .feature-card {
                padding: 16px;
            }

            .feature-icon {
                width: 40px;
                height: 40px;
            }

            .scene-tabs {
                padding: 0 16px;
            }

            .scene-tab {
                padding: 10px 12px;
                font-size: 12px;
            }

            .scene-detail-info {
                padding: 20px 16px;
            }

            .scene-detail-title {
                font-size: 20px;
            }

            .scene-detail-description {
                font-size: 13px;
                line-height: 1.5;
            }

            .specs-mini-grid {
                gap: 10px;
            }

            .spec-mini-card {
                padding: 14px;
            }

            .spec-mini-value {
                font-size: 22px;
            }

            .benefits-title {
                font-size: 26px;
            }

            .benefits-item {
                padding: 14px;
            }

            .benefit-icon {
                width: 40px;
                height: 40px;
            }

            .benefit-content h4 {
                font-size: 15px;
            }

            .benefit-content p {
                font-size: 13px;
            }

            .cta-title {
                font-size: 26px;
            }

            .cta-description {
                font-size: 14px;
            }
        }

        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 0.8s ease forwards;
        }

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

        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }