/* ==============================================
           【全局设计变量】 一键修改全站风格
           ============================================== */
        :root {
            /* 主色体系 */
            --primary-900: #0F172A;
            --primary-700: #1E3A8A;
            --primary-500: #2563EB;
            --primary-300: #93C5FD;
            --primary-100: #DBEAFE;
            /* 中性色 */
            --text-900: #0F172A;
            --text-600: #475569;
            --text-400: #94A3B8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --border-color: #E2E8F0;
            /* 设计规范 */
            --radius-lg: 16px;
            --radius-md: 12px;
            --shadow-card: 0 4px 16px rgba(15, 23, 42, 0.04);
            --shadow-hover: 0 20px 40px -12px rgba(30, 58, 138, 0.15);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-900);
            line-height: 1.8;
            background-color: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ==============================================
           【首屏 Hero】 文字靠左 + 大图收至右侧
           ============================================== */
        .hero-section {
            position: relative;
            min-height: 720px;
            display: flex;
            align-items: center;
            color: #fff;
            overflow: hidden;
            background-color: var(--primary-900);
            /* 【可修改】首屏背景大图：替换url内地址；图片靠右显示，左侧为纯色渐变 */
            background-image: 
                linear-gradient(90deg, rgba(15, 23, 42, 1) 0%, rgba(15, 23, 42, 0.28) 55%, rgba(30, 58, 138, 0.1) 80%, rgba(30, 58, 138, 0.1) 100%),
                url('//ueeshop.ly200-cdn.com/u_file/UPBH/UPBH996/2606/28/photo/ChatGPTImage2026628124754.png');
            background-size: auto 100%;
            background-position: right center;
            background-repeat: no-repeat;
        }

        /* 首屏内容单独控制左侧距离，大幅左移 */
        .hero-section .container {
            padding-left: 20px;
            width: 100%;
        }

        /* 背景浮动光效 */
        .hero-section::before,
        .hero-section::after {
            content: "";
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            opacity: 0.2;
            animation: floatLight 8s ease-in-out infinite alternate;
        }

        .hero-section::before {
            width: 400px;
            height: 400px;
            top: -100px;
            right: 20%;
            background: var(--primary-500);
        }

        .hero-section::after {
            width: 350px;
            height: 350px;
            bottom: -120px;
            left: 10%;
            background: var(--primary-300);
            animation-delay: 2s;
        }

        @keyframes floatLight {
            0% { transform: translate(0, 0) scale(1); }
            100% { transform: translate(30px, -30px) scale(1.1); }
        }

        /* 文字容器：完全靠左，宽度收窄 */
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 580px;
            margin-left: 0;
            text-align: left;
            padding-left: 0;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(147, 197, 253, 0.12);
            border: 1px solid rgba(147, 197, 253, 0.3);
            border-radius: 100px;
            font-size: 13px;
            color: var(--primary-300);
            margin-bottom: 36px;
            letter-spacing: 1.5px;
            backdrop-filter: blur(4px);
            font-weight: 500;
        }

        .hero-tag::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary-300);
        }

        .hero-title {
            font-size: 56px;
            font-weight: 700;
            line-height: 1.18;
            margin-bottom: 28px;
            letter-spacing: -0.5px;
        }

        .hero-title span {
            background: linear-gradient(90deg, #60A5FA 0%, #BFDBFE 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 600;
        }

        .hero-subtitle {
            font-size: 17px;
            color: #CBD5E1;
            margin-bottom: 48px;
            line-height: 1.9;
            font-weight: 400;
        }

        .hero-features {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
        }

        .hero-feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: #E2E8F0;
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .hero-feature-item svg {
            width: 18px;
            height: 18px;
            color: var(--primary-300);
            flex-shrink: 0;
        }

        /* ==============================================
           【通用区块标题】
           ============================================== */
        .section {
            padding: 100px 0;
            position: relative;
        }

        .section-title-wrap {
            text-align: center;
            margin-bottom: 72px;
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            color: var(--primary-500);
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 16px;
            padding: 6px 16px;
            background: var(--primary-100);
            border-radius: 100px;
        }

        .section-title {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-900);
            margin-bottom: 18px;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-600);
            max-width: 760px;
            margin: 0 auto;
            line-height: 1.8;
        }

        /* ==============================================
           【行业痛点】
           ============================================== */
        .pain-section {
            background: var(--bg-card);
        }

        .pain-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .pain-card {
            padding: 40px 32px;
            background: var(--bg-page);
            border-radius: var(--radius-lg);
            border-left: 4px solid var(--primary-500);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .pain-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            background: var(--bg-card);
        }

        .pain-card h4 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 14px;
        }

        .pain-card p {
            font-size: 14.5px;
            color: var(--text-600);
            line-height: 1.8;
        }

        /* ==============================================
           【方案对比表】
           ============================================== */
        .compare-section {
            background: var(--bg-page);
        }

        .compare-table-wrap {
            max-width: 1000px;
            margin: 0 auto;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
        }

        .compare-table th,
        .compare-table td {
            padding: 24px 32px;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
            font-size: 15px;
        }

        .compare-table th {
            background: var(--primary-700);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
        }

        .compare-table th:first-child {
            text-align: left;
            background: var(--primary-900);
            width: 22%;
        }

        .compare-table th:nth-child(2) {
            background: var(--primary-500);
        }

        .compare-table td:first-child {
            text-align: left;
            font-weight: 600;
            color: var(--text-900);
            background: var(--bg-page);
        }

        .compare-table td:nth-child(2) {
            background: #F0F7FF;
            font-weight: 500;
        }

        .compare-table tr:last-child td {
            border-bottom: none;
        }

        .status-good {
            color: #059669;
            font-weight: 600;
        }

        .status-normal {
            color: var(--text-600);
        }

        .status-bad {
            color: #DC2626;
        }

        /* ==============================================
           【核心定制能力】
           ============================================== */
        .custom-section {
            background: var(--bg-card);
        }

        .custom-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 24px;
        }

        .custom-card {
            background: var(--bg-card);
            padding: 44px 28px;
            border-radius: var(--radius-lg);
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }

        .custom-card:hover {
            border-color: var(--primary-500);
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .custom-icon {
            width: 68px;
            height: 68px;
            margin: 0 auto 28px;
            background: linear-gradient(135deg, var(--primary-100) 0%, #BFDBFE 100%);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary-700);
            font-weight: 700;
            transition: var(--transition);
        }

        .custom-card:hover .custom-icon {
            transform: scale(1.08);
            background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
            color: #fff;
        }

        .custom-card h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 14px;
        }

        .custom-card p {
            font-size: 14.5px;
            color: var(--text-600);
            line-height: 1.8;
            text-align: left;
        }

        /* ==============================================
           【产品内部结构】
           ============================================== */
        .structure-section {
            background: var(--bg-page);
        }

        .structure-wrap {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 80px;
            align-items: center;
        }

        .structure-image {
            width: 100%;
            height: 480px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, #E2E8F0 0%, #CBD5E1 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-600);
            /* 【可修改】产品结构图：替换背景图地址 */
            background-image: url('');
            background-size: cover;
            background-position: center;
            box-shadow: var(--shadow-card);
        }

        .structure-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .structure-item {
            padding: 28px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .structure-item:hover {
            border-color: var(--primary-300);
            box-shadow: 0 8px 24px rgba(30, 58, 138, 0.06);
            transform: translateX(4px);
        }

        .structure-item h4 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .structure-item h4::before {
            content: "";
            width: 5px;
            height: 20px;
            background: linear-gradient(180deg, var(--primary-500), var(--primary-700));
            border-radius: 3px;
        }

        .structure-item p {
            font-size: 15px;
            color: var(--text-600);
            padding-left: 17px;
            line-height: 1.8;
        }

        /* ==============================================
           【定制流程】
           ============================================== */
        .process-section {
            background: var(--bg-card);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-step {
            background: var(--bg-page);
            padding: 40px 28px;
            border-radius: var(--radius-lg);
            text-align: center;
            position: relative;
            transition: var(--transition);
            border-top: 4px solid var(--primary-500);
        }

        .process-step:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            background: var(--bg-card);
        }

        .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 24px;
            background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            box-shadow: 0 8px 16px rgba(37, 99, 235, 0.2);
        }

        .process-step h4 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 14px;
        }

        .process-step p {
            font-size: 14.5px;
            color: var(--text-600);
            line-height: 1.8;
        }

        /* ==============================================
           【技术参数规格】
           ============================================== */
        .spec-section {
            background: var(--bg-page);
        }

        .spec-table-wrap {
            max-width: 960px;
            margin: 0 auto;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }

        .spec-row {
            display: grid;
            grid-template-columns: 240px 1fr;
            border-bottom: 1px solid var(--border-color);
        }

        .spec-row:last-child {
            border-bottom: none;
        }

        .spec-label {
            padding: 22px 32px;
            background: var(--bg-page);
            font-weight: 600;
            color: var(--text-900);
            display: flex;
            align-items: center;
        }

        .spec-value {
            padding: 22px 32px;
            color: var(--text-600);
            line-height: 1.8;
        }

        /* ==============================================
           【品质管控体系】
           ============================================== */
        .quality-section {
            background: var(--bg-card);
        }

        .quality-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .quality-card {
            padding: 36px 28px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
            border: 1px solid var(--primary-100);
            transition: var(--transition);
        }

        .quality-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            background: #fff;
        }

        .quality-card h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .quality-card h4::before {
            content: "✓";
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-500);
            color: #fff;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .quality-card p {
            font-size: 14.5px;
            color: var(--text-600);
            line-height: 1.8;
        }

        /* ==============================================
           【应用场景】
           ============================================== */
        .scene-section {
            background: var(--bg-page);
        }

        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scene-item {
            padding: 40px 36px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .scene-item:hover {
            border-color: var(--primary-300);
            box-shadow: 0 12px 28px rgba(30, 58, 138, 0.08);
            transform: translateY(-4px);
        }

        .scene-item h4 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 14px;
        }

        .scene-item p {
            font-size: 14.5px;
            color: var(--text-600);
            line-height: 1.8;
        }

        /* ==============================================
           【核心优势】
           ============================================== */
        .advantage-section {
            background: var(--bg-card);
        }

        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .advantage-card {
            padding: 40px 24px;
            background: var(--bg-page);
            border-radius: var(--radius-md);
            text-align: center;
            transition: var(--transition);
        }

        .advantage-card:hover {
            background: var(--bg-card);
            box-shadow: var(--shadow-hover);
        }

        .advantage-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 14px;
        }

        .advantage-card p {
            font-size: 13.5px;
            color: var(--text-600);
            line-height: 1.8;
        }

        /* ==============================================
           【服务保障】
           ============================================== */
        .service-section {
            background: var(--bg-page);
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .service-card {
            background: var(--bg-card);
            padding: 48px 40px;
            border-radius: var(--radius-lg);
            transition: var(--transition);
            border-bottom: 4px solid var(--primary-500);
            box-shadow: var(--shadow-card);
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .service-card h4 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border-color);
        }

        .service-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .service-card li {
            font-size: 15px;
            color: var(--text-600);
            padding-left: 22px;
            position: relative;
            line-height: 1.7;
        }

        .service-card li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary-500);
        }

        /* ==============================================
           【常见问题 FAQ】
           ============================================== */
        .faq-section {
            background: var(--bg-card);
        }

        .faq-list {
            max-width: 920px;
            margin: 0 auto;
        }

        .faq-item {
            padding: 32px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-900);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .faq-question::before {
            content: "Q";
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary-100);
            color: var(--primary-700);
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .faq-answer {
            font-size: 15.5px;
            color: var(--text-600);
            padding-left: 48px;
            line-height: 1.9;
        }

        /* ==============================================
           【结尾转化 CTA】
           ============================================== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 100%);
            color: #fff;
            padding: 90px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            width: 600px;
            height: 600px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .cta-desc {
            font-size: 17px;
            color: #CBD5E1;
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-btn {
            display: inline-block;
            padding: 18px 56px;
            background: #fff;
            color: var(--primary-700);
            text-decoration: none;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
        }

        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
            background: var(--primary-100);
        }

        /* ==============================================
           【响应式适配】
           ============================================== */
        @media (max-width: 1024px) {
            .hero-title { font-size: 48px; }
            .pain-grid { grid-template-columns: repeat(2, 1fr); }
            .custom-grid { grid-template-columns: repeat(3, 1fr); }
            .advantage-grid { grid-template-columns: repeat(3, 1fr); }
            .scene-grid { grid-template-columns: repeat(2, 1fr); }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .quality-grid { grid-template-columns: repeat(2, 1fr); }
            .service-grid { grid-template-columns: 1fr; }
            .structure-wrap { grid-template-columns: 1fr; gap: 48px; }
            .compare-table th, .compare-table td { padding: 18px 16px; font-size: 14px; }
        }

        @media (max-width: 768px) {
            .container { padding: 0 20px; }
            .hero-section .container { padding-left: 20px; }
            .section { padding: 70px 0; }
            .hero-section { 
                min-height: auto; 
                padding: 90px 0;
                background-position: 80% center;
            }
            .hero-title { font-size: 36px; }
            .section-title { font-size: 30px; }
            .pain-grid, .custom-grid, .scene-grid, 
            .advantage-grid, .process-steps, .quality-grid {
                grid-template-columns: 1fr;
            }
            .hero-features { gap: 20px; }
            .spec-row { grid-template-columns: 1fr; }
            .spec-label { padding-bottom: 8px; }
            .spec-value { padding-top: 0; }
            .faq-question { font-size: 16px; gap: 12px; }
            .faq-answer { padding-left: 44px; font-size: 14.5px; }
        }