/* ========== Reset & Base ========== */
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #818cf8;
            --secondary: #06b6d4;
            --accent: #f59e0b;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --dark-3: #334155;
            --gray-50: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-300: #cbd5e1;
            --gray-500: #64748b;
            --gray-600: #475569;
            --gray-700: #334155;
            --gray-800: #1e293b;
            --white: #ffffff;
            --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
            --gradient-2: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            --gradient-3: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
            --gradient-text: linear-gradient(135deg, #818cf8 0%, #06b6d4 100%);
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
            --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --max-width: 1200px;
        }
        html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--gray-800);
            background: var(--white);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { text-decoration: none; color: inherit; -webkit-tap-highlight-color: transparent; }
        ul { list-style: none; }
        img { max-width: 100%; display: block; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

        /* ========== Section Title ========== */
        .section { padding: 100px 0; position: relative; }
        .section-header { text-align: center; max-width: 720px; margin: 0 auto 64px; }
        .section-tag {
            display: inline-flex; align-items: center; gap: 6px;
            background: rgba(99, 102, 241, 0.08);
            color: var(--primary);
            font-size: 14px; font-weight: 600;
            padding: 6px 16px; border-radius: 100px;
            margin-bottom: 20px;
        }
        .section-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
        .section-title { font-size: 40px; font-weight: 800; color: var(--dark); letter-spacing: -0.02em; line-height: 1.2; }
        .section-title .highlight { background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .section-subtitle { font-size: 18px; color: var(--gray-500); margin-top: 16px; line-height: 1.7; }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            font-size: 16px; font-weight: 600;
            padding: 14px 32px; border-radius: 100px;
            border: none; cursor: pointer; transition: all 0.3s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--gradient-2);
            color: var(--white);
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45); }
        .btn-secondary {
            background: rgba(255,255,255,0.1);
            color: var(--white);
            border: 1px solid rgba(255,255,255,0.2);
            backdrop-filter: blur(10px);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.4); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--gray-200);
        }
        .btn-outline:hover { border-color: var(--primary); background: rgba(99,102,241,0.04); }
        .btn-white { background: var(--white); color: var(--dark); box-shadow: var(--shadow-md); }
        .btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .btn-lg { padding: 16px 40px; font-size: 17px; }

        /* ========== Navigation ========== */
        .nav {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            transition: all 0.3s ease;
        }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .logo { display: flex; align-items: center; font-size: 22px; font-weight: 800; color: var(--dark); }
        .logo-img { display: block; height: 40px; width: auto; }
        .logo-icon {
            width: 40px; height: 40px; border-radius: 10px;
            background: var(--gradient-2);
            display: flex; align-items: center; justify-content: center;
            color: white; font-size: 20px; font-weight: 800;
            box-shadow: 0 4px 12px rgba(99,102,241,0.3);
        }
        .logo-text { letter-spacing: -0.02em; }
        .logo-text span { color: var(--primary); }
        .nav-links { display: flex; align-items: center; gap: 36px; }
        .nav-links a { font-size: 15px; font-weight: 500; color: var(--gray-600); transition: color 0.2s; position: relative; }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a::after {
            content: ""; position: absolute; bottom: -4px; left: 0; right: 0;
            height: 2px; background: var(--primary); border-radius: 2px;
            transform: scaleX(0); transition: transform 0.2s;
        }
        .nav-links a:hover::after { transform: scaleX(1); }
        .nav-cta { display: flex; align-items: center; gap: 12px; }
        .nav-cta .btn { padding: 10px 24px; font-size: 14px; }
        .mobile-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--dark); }

        /* ========== Hero ========== */
        .hero {
            position: relative; min-height: 100vh; display: flex; align-items: center;
            background: var(--gradient-3);
            overflow: hidden; padding-top: 72px;
        }
        .hero::before {
            content: ""; position: absolute; top: -50%; right: -20%;
            width: 800px; height: 800px; border-radius: 50%;
            background: radial-gradient(circle, rgba(99,102,241,0.25) 0%, transparent 70%);
            filter: blur(60px);
        }
        .hero::after {
            content: ""; position: absolute; bottom: -30%; left: -10%;
            width: 600px; height: 600px; border-radius: 50%;
            background: radial-gradient(circle, rgba(6,182,212,0.2) 0%, transparent 70%);
            filter: blur(60px);
        }
        .hero-bg-grid {
            position: absolute; inset: 0;
            background-image:
                linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
        }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 900px; margin: 0 auto; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(99, 102, 241, 0.15);
            border: 1px solid rgba(99, 102, 241, 0.3);
            color: #c7d2fe; font-size: 14px; font-weight: 500;
            padding: 8px 20px; border-radius: 100px; margin-bottom: 28px;
        }
        .hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 8px #34d399; animation: pulse 2s infinite; }
        @keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
        .hero h1 {
            font-size: 64px; font-weight: 800; color: var(--white);
            line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 24px;
        }
        .hero h1 .gradient-text {
            background: var(--gradient-text);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .hero p {
            font-size: 20px; color: rgba(255,255,255,0.7);
            max-width: 640px; margin: 0 auto 40px; line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .hero-stats {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
            margin-top: 72px; background: rgba(255,255,255,0.06);
            border-radius: var(--radius-lg); overflow: hidden;
            border: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat { background: rgba(15,23,42,0.5); padding: 32px 24px; text-align: center; }
        .hero-stat .num { font-size: 36px; font-weight: 800; color: var(--white); }
        .hero-stat .num .unit { font-size: 20px; color: var(--primary-light); }
        .hero-stat .label { font-size: 14px; color: rgba(255,255,255,0.5); margin-top: 8px; }

        /* ========== AI Platform Coverage ========== */
        .platforms { background: var(--gray-50); }
        .platform-grid {
            display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
        }
        .platform-card {
            background: var(--white); border: 1px solid var(--gray-200);
            border-radius: var(--radius-md); padding: 28px 20px;
            text-align: center; transition: all 0.3s ease;
            position: relative; overflow: hidden;
        }
        .platform-card::before {
            content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
            background: var(--gradient-2); transform: scaleX(0); transition: transform 0.3s;
        }
        .platform-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .platform-card:hover::before { transform: scaleX(1); }
        .platform-icon {
            width: 52px; height: 52px; margin: 0 auto 14px;
            border-radius: 12px; display: flex; align-items: center; justify-content: center;
            font-size: 22px; font-weight: 700; color: white;
        }
        .platform-name { font-size: 15px; font-weight: 600; color: var(--dark); }
        .platform-desc { font-size: 12px; color: var(--gray-500); margin-top: 4px; }

        /* ========== Services ========== */
        .services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .service-card {
            background: var(--white); border: 1px solid var(--gray-200);
            border-radius: var(--radius-lg); padding: 40px;
            transition: all 0.3s ease; position: relative; overflow: hidden;
        }
        .service-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); border-color: transparent; }
        .service-card .icon-wrap {
            width: 56px; height: 56px; border-radius: 14px;
            display: flex; align-items: center; justify-content: center;
            font-size: 28px; margin-bottom: 24px;
        }
        .service-card h3 { font-size: 22px; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
        .service-card p { font-size: 15px; color: var(--gray-500); line-height: 1.7; margin-bottom: 20px; }
        .service-card ul li { font-size: 14px; color: var(--gray-600); padding: 6px 0; display: flex; align-items: center; gap: 8px; }
        .service-card ul li::before { content: "✓"; color: var(--primary); font-weight: 700; }

        /* ========== Process ========== */
        .process { background: var(--dark); color: var(--white); }
        .process .section-title { color: var(--white); }
        .process .section-subtitle { color: rgba(255,255,255,0.6); }
        .process .section-tag { background: rgba(99,102,241,0.15); color: var(--primary-light); }
        .process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; }
        .process-line {
            position: absolute; top: 40px; left: 12.5%; right: 12.5%;
            height: 2px; background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0.3;
        }
        .process-step { text-align: center; position: relative; z-index: 2; }
        .process-num {
            width: 80px; height: 80px; margin: 0 auto 24px;
            border-radius: 50%; background: rgba(99,102,241,0.1);
            border: 2px solid rgba(99,102,241,0.3);
            display: flex; align-items: center; justify-content: center;
            font-size: 28px; font-weight: 800; color: var(--primary-light);
            transition: all 0.3s;
        }
        .process-step:hover .process-num {
            background: var(--gradient-2); border-color: transparent;
            color: white; box-shadow: 0 0 30px rgba(99,102,241,0.4);
        }
        .process-step h4 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
        .process-step p { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.6; }

        /* ========== Results / Data ========== */
        .results-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
        .results-chart {
            background: var(--gray-50); border: 1px solid var(--gray-200);
            border-radius: var(--radius-xl); padding: 40px;
        }
        .chart-bar-group { margin-bottom: 24px; }
        .chart-bar-label { display: flex; justify-content: space-between; font-size: 14px; font-weight: 600; color: var(--gray-700); margin-bottom: 8px; }
        .chart-bar-label .val { color: var(--primary); }
        .chart-bar-track { height: 12px; background: var(--gray-200); border-radius: 100px; overflow: hidden; }
        .chart-bar-fill { height: 100%; border-radius: 100px; background: var(--gradient-2); transition: width 1.5s ease; width: 0; }
        .results-info h3 { font-size: 32px; font-weight: 800; color: var(--dark); margin-bottom: 20px; line-height: 1.3; }
        .results-info p { font-size: 16px; color: var(--gray-500); line-height: 1.8; margin-bottom: 24px; }
        .results-list li { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--gray-100); }
        .results-list li:last-child { border-bottom: none; }
        .results-list .check { width: 24px; height: 24px; border-radius: 50%; background: rgba(99,102,241,0.1); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; margin-top: 2px; }
        .results-list .text { font-size: 15px; color: var(--gray-700); }
        .results-list .text strong { color: var(--dark); }

        /* ========== Cases ========== */
        .cases { background: var(--gray-50); }
        .cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .case-card {
            background: var(--white); border: 1px solid var(--gray-200);
            border-radius: var(--radius-lg); overflow: hidden;
            transition: all 0.3s ease;
        }
        .case-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); }
        .case-header { padding: 28px; background: var(--gradient-3); color: white; position: relative; }
        .case-header::before {
            content: ""; position: absolute; top: 0; right: 0; width: 150px; height: 150px;
            border-radius: 50%; background: radial-gradient(circle, rgba(99,102,241,0.2), transparent 70%);
        }
        .case-industry { font-size: 12px; color: var(--primary-light); font-weight: 600; margin-bottom: 8px; }
        .case-name { font-size: 20px; font-weight: 700; }
        .case-body { padding: 28px; }
        .case-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
        .case-metric { text-align: center; padding: 16px; background: var(--gray-50); border-radius: var(--radius-sm); }
        .case-metric .big { font-size: 28px; font-weight: 800; color: var(--primary); }
        .case-metric .small { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
        .case-desc { font-size: 14px; color: var(--gray-600); line-height: 1.6; }

        /* ========== Pricing ========== */
        .pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: stretch; }
        .pricing-card {
            background: var(--white); border: 2px solid var(--gray-200);
            border-radius: var(--radius-xl); padding: 36px 24px;
            display: flex; flex-direction: column; transition: all 0.3s ease;
            position: relative;
        }
        .pricing-card:hover { border-color: var(--primary); box-shadow: var(--shadow-xl); }
        .pricing-card.featured {
            border-color: var(--primary);
            background: var(--gradient-3);
            color: white;
            box-shadow: var(--shadow-glow);
        }
        .pricing-card.featured .price-amount,
        .pricing-card.featured .pricing-name,
        .pricing-card.featured .pricing-desc { color: white; }
        .pricing-card.featured .pricing-features li { color: rgba(255,255,255,0.8); }
        .pricing-card.featured .pricing-features li::before { color: var(--primary-light); }
        .pricing-badge {
            position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
            background: var(--gradient-2); color: white;
            font-size: 12px; font-weight: 700; padding: 6px 16px;
            border-radius: 100px; white-space: nowrap;
        }
        .pricing-name { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
        .pricing-desc { font-size: 14px; color: var(--gray-500); margin-bottom: 24px; }
        .price-amount { font-size: 42px; font-weight: 800; color: var(--dark); margin-bottom: 4px; }
        .price-amount .unit { font-size: 16px; font-weight: 500; color: var(--gray-500); }
        .price-period { font-size: 14px; color: var(--gray-500); margin-bottom: 28px; }
        .pricing-card.featured .price-period { color: rgba(255,255,255,0.5); }
        .pricing-features { flex: 1; margin-bottom: 28px; }
        .pricing-features li { font-size: 14px; color: var(--gray-600); padding: 8px 0; display: flex; align-items: flex-start; gap: 8px; }
        .pricing-features li::before { content: "✓"; color: var(--primary); font-weight: 700; flex-shrink: 0; }
        .pricing-card .btn { width: 100%; }
        .pricing-section-label { font-size: 12px; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: 0.05em; margin: 20px 0 8px; padding-top: 16px; border-top: 1px solid var(--gray-100); }
        .pricing-card.featured .pricing-section-label { color: var(--primary-light); border-top-color: rgba(255,255,255,0.1); }
        .pricing-platforms { font-size: 13px; color: var(--gray-600); line-height: 1.8; margin-bottom: 4px; }
        .pricing-card.featured .pricing-platforms { color: rgba(255,255,255,0.75); }
        .pricing-card.featured .pricing-features li::before { color: var(--primary-light); }
        .pricing-card.one-time { background: var(--gray-50); border-style: dashed; }
        .pricing-card.one-time:hover { border-style: solid; }

        /* ========== Advantages ========== */
        .advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .advantage-card {
            text-align: center; padding: 36px 24px;
            border-radius: var(--radius-lg);
            background: var(--gray-50); border: 1px solid var(--gray-200);
            transition: all 0.3s;
        }
        .advantage-card:hover { background: var(--white); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .advantage-icon {
            width: 64px; height: 64px; margin: 0 auto 20px;
            border-radius: 16px; display: flex; align-items: center; justify-content: center;
            font-size: 32px;
        }
        .advantage-card h4 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
        .advantage-card p { font-size: 14px; color: var(--gray-500); line-height: 1.6; }

        /* ========== FAQ ========== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            border: 1px solid var(--gray-200); border-radius: var(--radius-md);
            margin-bottom: 16px; overflow: hidden; transition: all 0.3s;
            background: var(--white);
        }
        .faq-item.active { border-color: var(--primary); box-shadow: var(--shadow-md); }
        .faq-question {
            padding: 24px 28px; font-size: 17px; font-weight: 600; color: var(--dark);
            cursor: pointer; display: flex; justify-content: space-between; align-items: center;
            transition: all 0.2s;
        }
        .faq-question:hover { color: var(--primary); }
        .faq-icon { width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; transition: transform 0.3s; flex-shrink: 0; }
        .faq-item.active .faq-icon { transform: rotate(45deg); color: var(--primary); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 28px;
        }
        .faq-item.active .faq-answer { max-height: 300px; padding: 0 28px 24px; }
        .faq-answer p { font-size: 15px; color: var(--gray-600); line-height: 1.8; }

        /* ========== CTA Section ========== */
        .cta-section {
            background: var(--gradient-3); position: relative; overflow: hidden;
            padding: 100px 0;
        }
        .cta-section::before {
            content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
            width: 1000px; height: 600px; border-radius: 50%;
            background: radial-gradient(circle, rgba(99,102,241,0.2) 0%, transparent 60%);
            filter: blur(40px);
        }
        .cta-content { position: relative; z-index: 2; text-align: center; max-width: 700px; margin: 0 auto; }
        .cta-content h2 { font-size: 44px; font-weight: 800; color: white; line-height: 1.2; margin-bottom: 20px; }
        .cta-content h2 .gradient-text { background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .cta-content p { font-size: 18px; color: rgba(255,255,255,0.6); margin-bottom: 36px; }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .cta-contact { display: flex; gap: 32px; justify-content: center; margin-top: 48px; flex-wrap: wrap; }
        .cta-contact-item { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,0.7); font-size: 15px; }

        /* ========== Footer ========== */
        .footer { background: #0a0f1e; color: rgba(255,255,255,0.6); padding: 64px 0 32px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
        .footer-brand .logo { color: white; margin-bottom: 16px; }
        .footer-brand p { font-size: 14px; line-height: 1.7; max-width: 320px; }
        .footer-col h5 { color: white; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.5); transition: color 0.2s; }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 32px; display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
        .footer-bottom a { color: rgba(255,255,255,0.4); }

        /* ========== Animations ========== */
        .fade-in { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .fade-in.visible { opacity: 1; transform: translateY(0); }

        /* ========== Mobile Menu (Off-canvas) ========== */
        .mobile-menu-overlay {
            display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; transition: opacity 0.3s;
        }
        .mobile-menu-overlay.active { display: block; opacity: 1; }
        .mobile-menu {
            position: fixed; top: 0; right: -100%; width: 80%; max-width: 340px; height: 100vh;
            background: var(--white); z-index: 999;
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 88px 24px 32px; overflow-y: auto;
            box-shadow: -4px 0 30px rgba(0,0,0,0.15);
            padding-top: max(88px, calc(88px + env(safe-area-inset-top)));
            padding-bottom: max(32px, env(safe-area-inset-bottom));
        }
        .mobile-menu.active { right: 0; }
        .mobile-menu a {
            display: block; padding: 16px 0; font-size: 17px; font-weight: 600; color: var(--gray-700);
            border-bottom: 1px solid var(--gray-100); transition: color 0.2s;
        }
        .mobile-menu a:active { color: var(--primary); }
        .mobile-menu .btn { width: 100%; margin-top: 20px; }
        .mobile-menu-close {
            position: absolute; top: 20px; right: 20px;
            width: 40px; height: 40px; border: none; background: var(--gray-100);
            border-radius: 50%; font-size: 20px; cursor: pointer; color: var(--dark);
            display: flex; align-items: center; justify-content: center;
            top: max(20px, env(safe-area-inset-top));
        }

        /* ========== QR Modal ========== */
        .qr-modal {
            position: fixed; inset: 0; z-index: 9999;
            display: flex; align-items: center; justify-content: center;
            padding: 20px;
            opacity: 0; visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }
        .qr-modal.open { opacity: 1; visibility: visible; }
        .qr-modal-overlay {
            position: absolute; inset: 0;
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .qr-modal-card {
            position: relative;
            width: 100%; max-width: 440px;
            background: var(--white);
            border-radius: 24px;
            padding: 40px 32px 32px;
            text-align: center;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
            transform: scale(0.92) translateY(20px);
            transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
            max-height: calc(100vh - 40px);
            overflow-y: auto;
        }
        .qr-modal.open .qr-modal-card { transform: scale(1) translateY(0); }
        .qr-modal-close {
            position: absolute; top: 16px; right: 16px;
            width: 36px; height: 36px; border-radius: 50%;
            background: var(--gray-100); color: var(--gray-700);
            border: none; cursor: pointer; font-size: 22px; line-height: 1;
            display: flex; align-items: center; justify-content: center;
            transition: all 0.2s ease;
            font-family: inherit;
        }
        .qr-modal-close:hover { background: var(--primary); color: white; transform: rotate(90deg); }
        .qr-modal-badge {
            display: inline-block;
            padding: 6px 16px; border-radius: 20px;
            background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(168,85,247,0.1));
            color: var(--primary);
            font-size: 13px; font-weight: 600;
            margin-bottom: 16px;
        }
        .qr-modal-title {
            font-size: 22px; font-weight: 800;
            color: var(--dark);
            margin-bottom: 8px; line-height: 1.3;
        }
        .qr-modal-subtitle {
            font-size: 14px; color: var(--gray-600);
            margin-bottom: 24px; line-height: 1.6;
        }
        .qr-modal-image-wrap {
            position: relative;
            display: inline-block;
            padding: 12px;
            background: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
            border-radius: 20px;
            margin-bottom: 20px;
            box-shadow: 0 10px 30px -5px rgba(99, 102, 241, 0.4);
        }
        .qr-modal-image {
            display: block;
            width: 260px; height: 260px;
            background: white;
            border-radius: 12px;
        }
        .qr-modal-shine {
            position: absolute;
            top: -2px; left: -100%;
            width: 50%; height: calc(100% + 4px);
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
            animation: qrShine 3s infinite;
            border-radius: 20px;
        }
        @keyframes qrShine {
            0% { left: -100%; }
            50%, 100% { left: 150%; }
        }
        .qr-modal-tips {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 10px 18px;
            background: var(--gray-100);
            border-radius: 30px;
            font-size: 14px; color: var(--gray-700);
            margin-bottom: 16px;
        }
        .qr-modal-tip-icon { font-size: 16px; }
        .qr-modal-foot {
            font-size: 13px; color: var(--gray-500);
            line-height: 1.6;
            padding: 12px 16px;
            background: linear-gradient(135deg, rgba(99,102,241,0.04), rgba(168,85,247,0.04));
            border-radius: 12px;
        }
        .qr-modal-foot strong {
            color: var(--primary);
            background: rgba(99,102,241,0.1);
            padding: 2px 8px;
            border-radius: 6px;
            margin: 0 2px;
            font-weight: 600;
        }
        body.qr-modal-active { overflow: hidden; }

        /* ========== Responsive ========== */

        /* ===== Tablet (≤1024px) ===== */
        @media (max-width: 1024px) {
            .platform-grid { grid-template-columns: repeat(4, 1fr); }
            .hero h1 { font-size: 52px; }
            .section-title { font-size: 34px; }
            .footer-grid { grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
            .footer-grid .footer-col:last-child { grid-column: span 3; }
            .pricing-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 600px; margin: 0 auto; }
        }

        /* ===== Mobile Large (≤768px) ===== */
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-cta .btn-outline { display: none; }
            .nav-cta .btn-primary { padding: 8px 18px; font-size: 13px; }
            .mobile-toggle { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 8px; background: var(--gray-100); }

            .container { padding: 0 20px; }

            .hero { min-height: 100svh; padding-top: 72px; }
            .hero h1 { font-size: 38px; margin-bottom: 16px; }
            .hero p { font-size: 16px; margin-bottom: 28px; }
            .hero-actions { flex-direction: column; width: 100%; max-width: 320px; margin: 0 auto; }
            .hero-actions .btn { width: 100%; }
            .hero-stats { grid-template-columns: repeat(2, 1fr); margin-top: 48px; }
            .hero-stat { padding: 24px 16px; }
            .hero-stat .num { font-size: 30px; }

            .section { padding: 64px 0; }
            .section-header { margin-bottom: 40px; }
            .section-title { font-size: 28px; }
            .section-subtitle { font-size: 15px; }

            .platform-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
            .platform-card { padding: 20px 12px; }
            .platform-icon { width: 44px; height: 44px; font-size: 18px; }
            .platform-name { font-size: 13px; }
            .platform-desc { font-size: 11px; }

            .services-grid { grid-template-columns: 1fr; gap: 16px; }
            .service-card { padding: 28px 24px; }
            .service-card h3 { font-size: 20px; }

            .process-steps { grid-template-columns: repeat(2, 1fr); gap: 32px 20px; }
            .process-line { display: none; }
            .process-num { width: 64px; height: 64px; font-size: 22px; }
            .process-step h4 { font-size: 18px; }

            .results-grid { grid-template-columns: 1fr; gap: 32px; }
            .results-chart { padding: 24px 20px; }
            .results-info h3 { font-size: 24px; }
            .chart-bar-label { font-size: 13px; flex-wrap: wrap; gap: 4px; }

            .cases-grid { grid-template-columns: 1fr; gap: 20px; }
            .case-header { padding: 24px 20px; }
            .case-body { padding: 24px 20px; }
            .case-metric .big { font-size: 24px; }

            .pricing-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; max-width: 600px; margin: 0 auto; }
            .pricing-card { padding: 32px 24px; }
            .pricing-card.featured { transform: none; }
            .price-amount { font-size: 36px; }

            .advantages-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .advantage-card { padding: 24px 16px; }
            .advantage-icon { width: 52px; height: 52px; font-size: 26px; }
            .advantage-card h4 { font-size: 16px; }
            .advantage-card p { font-size: 13px; }

            .faq-question { padding: 18px 20px; font-size: 15px; }
            .faq-answer { padding: 0 20px; }
            .faq-item.active .faq-answer { padding: 0 20px 20px; }
            .faq-answer p { font-size: 14px; }

            .cta-section { padding: 64px 0; }
            .cta-content h2 { font-size: 30px; }
            .cta-content p { font-size: 16px; }
            .cta-actions { flex-direction: column; width: 100%; max-width: 320px; margin: 0 auto; }
            .cta-actions .btn { width: 100%; }
            .cta-contact { flex-direction: column; gap: 16px; margin-top: 32px; }

            .footer { padding: 48px 0 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-grid .footer-brand { grid-column: span 2; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; font-size: 12px; }
        }

        /* ===== Mobile Small (≤480px) ===== */
        @media (max-width: 480px) {
            .container { padding: 0 16px; }
            .logo { font-size: 18px; }
            .logo-img { height: 34px; }
            .logo-icon { width: 34px; height: 34px; font-size: 17px; }

            .hero h1 { font-size: 30px; }
            .hero-badge { font-size: 12px; padding: 6px 14px; }
            .hero p { font-size: 15px; }
            .hero-stats { grid-template-columns: repeat(2, 1fr); }
            .hero-stat .num { font-size: 26px; }
            .hero-stat .label { font-size: 12px; }
            .hero-stat { padding: 20px 12px; }

            .section { padding: 48px 0; }
            .section-title { font-size: 24px; }
            .section-subtitle { font-size: 14px; }
            .section-header { margin-bottom: 32px; }

            .platform-grid { grid-template-columns: repeat(2, 1fr); }

            .service-card { padding: 24px 20px; }
            .service-card h3 { font-size: 18px; }
            .service-card p { font-size: 14px; }
            .service-card ul li { font-size: 13px; }

            .process-steps { grid-template-columns: 1fr; gap: 28px; }
            .process-num { width: 56px; height: 56px; font-size: 20px; margin-bottom: 16px; }

            .results-info h3 { font-size: 20px; }
            .results-info p { font-size: 14px; }
            .results-list .text { font-size: 13px; }

            .case-metrics { gap: 10px; }
            .case-metric { padding: 12px 8px; }
            .case-metric .big { font-size: 22px; }
            .case-metric .small { font-size: 11px; }
            .case-desc { font-size: 13px; }

            .pricing-card { padding: 28px 20px; }
            .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
            .price-amount { font-size: 32px; }
            .pricing-features li { font-size: 13px; }

            .advantages-grid { grid-template-columns: 1fr; }

            .faq-question { padding: 16px; font-size: 14px; }
            .faq-answer p { font-size: 13px; }

            .cta-content h2 { font-size: 26px; }
            .cta-content p { font-size: 14px; }
            .cta-contact-item { font-size: 13px; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-grid .footer-brand { grid-column: span 1; }
            .footer-brand p { font-size: 13px; }
        }

        /* ===== Landscape Phone ===== */
        @media (max-width: 896px) and (orientation: landscape) and (max-height: 500px) {
            .hero { min-height: 100svh; padding-top: 72px; padding-bottom: 40px; }
            .hero-stats { margin-top: 32px; }
        }

        /* ===== Reduce motion ===== */
        @media (max-width: 360px) {
            .qr-modal-image { width: 200px; height: 200px; }
            .qr-modal-card { padding: 32px 20px 24px; }
            .qr-modal-title { font-size: 19px; }
            .qr-modal-subtitle { font-size: 13px; margin-bottom: 18px; }
        }

        @media (prefers-reduced-motion: reduce) {
            * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
            html { scroll-behavior: auto; }
        }