/* 全局重置 & 字体 —— 修正所有缺失的冒号 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Arial', sans-serif;
        }

        body {
            background-color: #ffffff;
            color: #333333;
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
        }

        /* 修复所有图标倾斜问题 - 全局 */
        .fas, .far, .fab, .fa-solid, .fa-regular, .fa-brands {
            font-style: normal !important;
        }

        .step-circle i,
        .section-icon i, 
        .option-icon i,
        .wireless-icon i,
        .nav-btn i {
            font-style: normal !important;
            transform: none !important;
        }

        /* 全屏科技感背景 - 白色版本 */
        .tech-background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -3;
            pointer-events: none;
            background: 
                radial-gradient(circle at 20% 30%, rgba(0, 123, 255, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(0, 198, 255, 0.03) 0%, transparent 50%),
                linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
        }

        /* 动态网格背景 */
        .grid-background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -2;
            background-image: 
                linear-gradient(rgba(0, 123, 255, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 123, 255, 0.05) 1px, transparent 1px);
            background-size: 50px 50px;
            opacity: 0.4;
            animation: gridMove 20s linear infinite;
        }

        @keyframes gridMove {
            0% { transform: translate(0, 0); }
            100% { transform: translate(50px, 50px); }
        }

        /* 物联网连接线效果 */
        .iot-connections {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            pointer-events: none;
        }

        .connection {
            position: absolute;
            background: linear-gradient(90deg, transparent, rgba(0, 123, 255, 0.2), transparent);
            height: 1px;
            transform-origin: left center;
            animation: connectionPulse 4s infinite;
        }

        @keyframes connectionPulse {
            0%, 100% { opacity: 0.1; }
            50% { opacity: 0.3; }
        }

        /* 浮动数据点 */
        .data-points {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            pointer-events: none;
        }

        .data-point {
            position: absolute;
            width: 4px;
            height: 4px;
            background-color: rgba(0, 123, 255, 0.5);
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(0, 123, 255, 0.3);
            animation: dataPointFloat 8s infinite ease-in-out;
        }

        @keyframes dataPointFloat {
            0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
            50% { transform: translateY(-20px) scale(1.2); opacity: 0.6; }
        }

        /* 脉冲光环 */
        .pulse-ring {
            position: absolute;
            border-radius: 50%;
            border: 1px solid rgba(0, 123, 255, 0.15);
            animation: pulse 3s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(0.8); opacity: 0.3; }
            70% { transform: scale(1.5); opacity: 0; }
            100% { transform: scale(1.5); opacity: 0; }
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 20px;
        }

        /* 顶部横幅 */
        .product-banner {
            position: relative;
            padding: 60px 0;
            text-align: center;
            border-radius: 20px;
            margin-bottom: 40px;
            overflow: hidden;
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
            border: 1px solid rgba(0, 123, 255, 0.1);
            box-shadow: 
                0 15px 30px rgba(0, 0, 0, 0.05),
                inset 0 1px 0 rgba(255, 255, 255, 0.8);
        }

        .product-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.03) 0%, transparent 50%);
            z-index: 0;
        }

        .product-banner h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            font-weight: 800;
            position: relative;
            z-index: 1;
            background: linear-gradient(90deg, #007bff, #00c6ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: titleGlow 3s infinite alternate;
        }

        @keyframes titleGlow {
            0% { text-shadow: 0 0 20px rgba(0, 123, 255, 0.1); }
            100% { text-shadow: 0 0 30px rgba(0, 198, 255, 0.2); }
        }

        .product-subtitle {
            font-size: 1.5rem;
            margin-bottom: 20px;
            color: #64748b;
            font-weight: 400;
            position: relative;
            z-index: 1;
        }

        .product-tagline {
            font-size: 1.1rem;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background: rgba(255, 255, 255, 0.8);
            border-radius: 12px;
            border: 1px solid rgba(0, 123, 255, 0.1);
            color: #475569;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(5px);
        }

        .product-tagline::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 198, 255, 0.05), transparent);
            animation: shimmer 6s infinite;
        }

        @keyframes shimmer {
            0% { left: -100%; }
            100% { left: 100%; }
        }

        /* 主要特性区域 */
        .features-section {
            margin-bottom: 60px;
        }

        .section-header {
            display: flex;
            align-items: center;
            margin-bottom: 40px;
            padding-bottom: 15px;
            border-bottom: 1px solid rgba(0, 123, 255, 0.1);
            position: relative;
        }

        .section-header::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100px;
            height: 2px;
            background: linear-gradient(90deg, #007bff, #00c6ff);
            animation: lineGrow 2s infinite alternate;
        }

        @keyframes lineGrow {
            0% { width: 100px; }
            100% { width: 150px; }
        }

        .section-icon {
            width: 60px;
            height: 60px;
            background: rgba(0, 123, 255, 0.05);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 20px;
            color: #007bff;
            font-size: 1.8rem;
            border: 1px solid rgba(0, 123, 255, 0.1);
            position: relative;
            overflow: hidden;
        }

        .section-icon::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(0, 198, 255, 0.05), transparent);
            animation: iconShine 3s infinite;
        }

        @keyframes iconShine {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: #1e293b;
        }

        .section-subtitle {
            color: #64748b;
            font-size: 1.1rem;
            margin-top: 8px;
        }

        /* 特性卡片网格 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 25px;
        }

        .feature-card {
            background: white;
            border-radius: 18px;
            padding: 30px;
            border: 1px solid rgba(0, 123, 255, 0.1);
            transition: all 0.4s ease;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.02), transparent);
            z-index: 0;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 
                0 15px 35px rgba(0, 123, 255, 0.1),
                0 0 0 1px rgba(0, 198, 255, 0.1);
            border-color: rgba(0, 198, 255, 0.2);
        }

        .feature-card:hover .square-icon {
            transform: scale(1.1) rotate(5deg);
            box-shadow: 0 0 20px rgba(0, 198, 255, 0.1);
        }

        .feature-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .square-icon {
            width: 55px;
            height: 55px;
            background: rgba(0, 123, 255, 0.05);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 18px;
            color: #007bff;
            font-size: 1.6rem;
            border: 1px solid rgba(0, 123, 255, 0.1);
            transition: all 0.4s ease;
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }

        .feature-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #1e293b;
            position: relative;
            z-index: 1;
        }

        .feature-list {
            list-style-type: none;
            position: relative;
            z-index: 1;
            flex-grow: 1;
        }

        .feature-list li {
            padding: 8px 0;
            color: #475569;
            line-height: 1.6;
            font-size: 1rem;
            display: flex;
            align-items: flex-start;
            border-bottom: 1px solid rgba(226, 232, 240, 0.5);
        }

        .feature-list li:last-child {
            border-bottom: none;
        }

        .feature-list li i {
            color: #007bff;
            margin-right: 10px;
            margin-top: 3px;
            font-size: 0.85rem;
        }

        /* 动态数字指标 */
        .stats-section {
            margin-bottom: 60px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }

        .stat-card {
            background: white;
            border-radius: 18px;
            padding: 30px 20px;
            text-align: center;
            border: 1px solid rgba(0, 123, 255, 0.1);
            transition: all 0.4s ease;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.02), transparent);
            z-index: 0;
        }

        .stat-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 123, 255, 0.1), 0 0 0 1px rgba(0, 198, 255, 0.1);
            border-color: rgba(0, 198, 255, 0.2);
        }

        .stat-icon {
            font-size: 2.2rem;
            color: #007bff;
            margin-bottom: 15px;
            position: relative;
            z-index: 1;
        }

        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: #007bff;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
            font-family: 'Arial Black', 'Segoe UI', sans-serif;
        }

        .stat-symbol {
            font-size: 1.8rem;
            color: #007bff;
            position: relative;
            z-index: 1;
        }

        .stat-label {
            font-size: 1.1rem;
            color: #475569;
            font-weight: 500;
            position: relative;
            z-index: 1;
        }

        /* 尺寸选型卡片 (新增) */
        .size-section {
            margin-bottom: 60px;
        }

        .size-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }

        .size-card {
            background: white;
            border-radius: 18px;
            padding: 30px 20px;
            border: 1px solid rgba(0, 123, 255, 0.1);
            transition: all 0.4s ease;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .size-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.02), transparent);
            z-index: 0;
        }

        .size-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 123, 255, 0.1), 0 0 0 1px rgba(0, 198, 255, 0.1);
            border-color: rgba(0, 198, 255, 0.2);
        }

        .size-icon {
            font-size: 2.5rem;
            color: #007bff;
            margin-bottom: 15px;
            position: relative;
            z-index: 1;
        }

        .size-name {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .size-badge {
            display: inline-block;
            background: rgba(0, 123, 255, 0.1);
            color: #007bff;
            padding: 5px 15px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(0, 123, 255, 0.2);
        }

        .size-features {
            list-style: none;
            text-align: left;
            margin-top: 15px;
            position: relative;
            z-index: 1;
        }

        .size-features li {
            padding: 6px 0;
            color: #475569;
            display: flex;
            align-items: center;
            gap: 8px;
            border-bottom: 1px dashed rgba(0, 123, 255, 0.1);
        }

        .size-features li i {
            color: #00c6ff;
            width: 20px;
        }

        /* 应用场景 */
        .applications-section {
            margin-bottom: 60px;
        }

        .applications-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 25px;
        }

        .application-card {
            background: white;
            border-radius: 18px;
            padding: 25px;
            text-align: center;
            border: 1px solid rgba(0, 123, 255, 0.1);
            transition: all 0.4s ease;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
        }

        .application-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.02), transparent);
            z-index: 0;
        }

        .application-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 123, 255, 0.1), 0 0 0 1px rgba(0, 198, 255, 0.1);
            border-color: rgba(0, 198, 255, 0.2);
        }

        .application-card:hover .application-icon {
            transform: scale(1.2);
        }

        .application-icon {
            font-size: 2.5rem;
            color: #007bff;
            margin-bottom: 15px;
            transition: all 0.4s ease;
            position: relative;
            z-index: 1;
        }

        .application-title {
            font-size: 1.3rem;
            font-weight: 600;
            color: #1e293b;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .application-desc {
            color: #64748b;
            font-size: 0.95rem;
            position: relative;
            z-index: 1;
        }

        /* 软件版本选型 (复用) */
        .version-section {
            margin-bottom: 60px;
        }

        .version-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }

        .version-card {
            background: white;
            border-radius: 18px;
            padding: 30px 20px;
            border: 1px solid rgba(0, 123, 255, 0.1);
            transition: all 0.4s ease;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .version-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.02), transparent);
            z-index: 0;
        }

        .version-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 123, 255, 0.1), 0 0 0 1px rgba(0, 198, 255, 0.1);
            border-color: rgba(0, 198, 255, 0.2);
        }

        .version-icon {
            font-size: 2.5rem;
            color: #00c6ff;
            margin-bottom: 15px;
            position: relative;
            z-index: 1;
        }

        .version-name {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .version-badge {
            display: inline-block;
            background: rgba(0, 123, 255, 0.1);
            color: #007bff;
            padding: 5px 15px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(0, 123, 255, 0.2);
        }

        .version-features {
            list-style: none;
            text-align: left;
            margin-top: 15px;
            position: relative;
            z-index: 1;
        }

        .version-features li {
            padding: 6px 0;
            color: #475569;
            display: flex;
            align-items: center;
            gap: 8px;
            border-bottom: 1px dashed rgba(0, 123, 255, 0.1);
        }

        .version-features li i {
            color: #00c6ff;
            width: 20px;
        }

        /* 质量认证 - 卡片列表 */
        .certification-section {
            margin-bottom: 60px;
        }

        .certification-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 25px;
        }

        .certification-card {
            background: white;
            border-radius: 18px;
            padding: 30px;
            border: 1px solid rgba(0, 123, 255, 0.1);
            transition: all 0.4s ease;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
        }

        .certification-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.02), transparent);
            z-index: 0;
        }

        .certification-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 123, 255, 0.1), 0 0 0 1px rgba(0, 198, 255, 0.1);
            border-color: rgba(0, 198, 255, 0.2);
        }

        .certification-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .certification-icon {
            width: 50px;
            height: 50px;
            background: rgba(0, 123, 255, 0.05);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            color: #007bff;
            font-size: 1.4rem;
            border: 1px solid rgba(0, 123, 255, 0.1);
        }

        .certification-title {
            font-size: 1.4rem;
            font-weight: 600;
            color: #1e293b;
        }

        .certification-list {
            list-style-type: none;
            position: relative;
            z-index: 1;
        }

        .certification-list li {
            padding: 8px 0;
            color: #475569;
            line-height: 1.6;
            font-size: 1rem;
            display: flex;
            align-items: flex-start;
            border-bottom: 1px solid rgba(226, 232, 240, 0.5);
        }

        .certification-list li:last-child {
            border-bottom: none;
        }

        .certification-list li i {
            color: #007bff;
            margin-right: 10px;
            margin-top: 3px;
            font-size: 0.85rem;
        }

        /* 底部行动区域 */
        .action-section {
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
            border-radius: 20px;
            padding: 50px;
            text-align: center;
            margin-bottom: 50px;
            border: 1px solid rgba(0, 123, 255, 0.1);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.05), inset 0 1px 0 rgba(255, 255, 255, 0.8);
            position: relative;
            overflow: hidden;
        }

        .action-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 123, 255, 0.03), transparent);
            z-index: 0;
        }

        .action-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .action-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
            position: relative;
            z-index: 1;
        }

        .action-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, #007bff, #00c6ff);
            color: white;
            border: none;
            padding: 16px 30px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.4s ease;
            text-decoration: none;
            box-shadow: 0 8px 20px rgba(0, 123, 255, 0.15);
            position: relative;
            overflow: hidden;
        }

        .action-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.7s;
        }

        .action-btn:hover::before {
            left: 100%;
        }

        .action-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0, 123, 255, 0.25);
        }

        .action-btn.secondary {
            background: white;
            color: #475569;
            border: 1px solid rgba(0, 123, 255, 0.2);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .action-btn.secondary:hover {
            background: white;
            color: #1e293b;
            border-color: rgba(0, 198, 255, 0.3);
            box-shadow: 0 8px 20px rgba(0, 123, 255, 0.15);
        }

        /* 物联网设备图标动画 */
        .iot-device {
            position: absolute;
            font-size: 1.5rem;
            color: rgba(0, 123, 255, 0.4);
            animation: deviceFloat 10s infinite ease-in-out;
        }

        @keyframes deviceFloat {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            25% { transform: translate(20px, -10px) rotate(5deg); }
            50% { transform: translate(0, -20px) rotate(0deg); }
            75% { transform: translate(-20px, -10px) rotate(-5deg); }
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .product-banner h1 { font-size: 2.2rem; }
            .product-subtitle { font-size: 1.2rem; }
            .section-title { font-size: 1.8rem; }
            .features-grid, .applications-grid, .certification-grid, .version-grid, .size-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr; }
            .action-buttons { flex-direction: column; align-items: center; }
            .action-btn { width: 100%; max-width: 280px; justify-content: center; }
            .action-section { padding: 35px 20px; }
            .stat-number { font-size: 2.5rem; }
            .square-icon { width: 50px; height: 50px; font-size: 1.4rem; }
            .product-banner { padding: 40px 0; }
        }

        @media (max-width: 480px) {
            .section-header { flex-direction: column; align-items: flex-start; }
            .section-icon { margin-bottom: 15px; }
            .stat-number { font-size: 2.2rem; }
            .square-icon { width: 45px; height: 45px; font-size: 1.3rem; margin-right: 15px; }
            .feature-header { flex-direction: column; align-items: flex-start; }
            .feature-header h3 { margin-top: 12px; }
            .product-banner h1 { font-size: 1.8rem; }
            .product-subtitle { font-size: 1.1rem; }
            .product-tagline { padding: 15px; font-size: 1rem; }
        }