/* ===== Reset & Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        :root {
            --blue: #1677FF;
            --blue-dark: #0958D9;
            --blue-light: #F0F7FF;
            --blue-glow: #E6F4FF;
            --slate-50: #F8FAFC;
            --slate-100: #F1F5F9;
            --slate-200: #E2E8F0;
            --slate-300: #CBD5E1;
            --slate-400: #94A3B8;
            --slate-500: #64748B;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1E293B;
            --slate-900: #0F172A;
            --white: #FFFFFF;
            --green-50: #F0FDF4;
            --green-100: #DCFCE7;
            --green-500: #22C55E;
            --green-600: #16A34A;
            --green-700: #15803D;
            --purple-50: #FAF5FF;
            --purple-500: #A855F7;
            --purple-600: #9333EA;
            --red-500: #EF4444;
            --cyan: #22D3EE;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
            --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
            --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.05);
            --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.15);
            --shadow-blue: 0 10px 20px -5px rgba(22,119,255,0.4);
            --shadow-blue-lg: 0 50px 100px -20px rgba(22,119,255,0.2);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            color: var(--slate-600);
            background: var(--white);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        ::selection {
            background: var(--blue);
            color: var(--white);
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        img {
            max-width: 100%;
            display: block;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            border-radius: 999px;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            font-family: inherit;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--blue);
            color: var(--white);
            padding: 0 24px;
            height: 40px;
            box-shadow: var(--shadow-blue);
        }
        .btn-primary:hover {
            background: var(--blue-dark);
            transform: translateY(-1px);
            box-shadow: 0 15px 25px -5px rgba(22,119,255,0.45);
        }

        .btn-ghost {
            background: transparent;
            color: var(--slate-600);
            padding: 0 16px;
            height: 40px;
            border: 1px solid var(--slate-200);
        }
        .btn-ghost:hover {
            color: var(--blue);
            border-color: var(--blue);
        }

        .btn-lg {
            height: 56px;
            padding: 0 32px;
            font-size: 18px;
            border-radius: var(--radius);
        }

        /* ===== Navigation ===== */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 80px;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--slate-200);
            transition: all 0.3s ease;
        }

        .nav.scrolled {
            box-shadow: 0 1px 3px rgba(0,0,0,0.08);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 24px;
            font-weight: 700;
            color: var(--slate-800);
            letter-spacing: 1px;
        }
        .nav-logo:hover .nav-logo-icon {
            transform: scale(1.05);
        }
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            transition: transform 0.3s ease;
        }

        .nav-links {
            display: none;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--slate-600);
            transition: color 0.2s;
        }
        .nav-link:hover {
            color: var(--blue);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-actions .btn { display: none; }
        .nav-actions .btn-demo { display: none; }

        .nav-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: none;
            border: none;
            color: var(--slate-600);
            cursor: pointer;
        }

        /* ===== Dropdown ===== */
        .dropdown {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
        }
        .dropdown-toggle {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 15px;
            font-weight: 500;
            color: var(--slate-600);
            cursor: pointer;
            background: none;
            border: none;
            font-family: inherit;
            padding: 8px 0;
            transition: color 0.2s;
        }
        .dropdown-toggle:hover { color: var(--blue); }
        .dropdown-icon {
            transition: transform 0.3s ease;
        }
        .dropdown:hover .dropdown-icon {
            transform: rotate(-180deg);
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: -16px;
            width: 500px;
            background: var(--white);
            border-radius: var(--radius-xl);
            box-shadow: 0 8px 30px rgba(0,0,0,0.12);
            border: 1px solid var(--slate-100);
            padding: 8px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: all 0.3s ease;
            pointer-events: none;
        }
        .dropdown:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            pointer-events: auto;
        }
        .dropdown-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px;
            border-radius: var(--radius);
            transition: all 0.2s;
        }
        .dropdown-item:hover {
            background: var(--blue-light);
        }
        .dropdown-item-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius);
            background: var(--slate-50);
            color: var(--slate-500);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all 0.2s;
        }
        .dropdown-item:hover .dropdown-item-icon {
            background: var(--blue);
            color: var(--white);
        }
        .dropdown-item-title {
            font-weight: 700;
            font-size: 14px;
            color: var(--slate-800);
            transition: color 0.2s;
        }
        .dropdown-item:hover .dropdown-item-title { color: var(--blue); }
        .dropdown-item-desc {
            font-size: 12px;
            color: var(--slate-400);
            margin-top: 2px;
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            top: 80px;
            background: var(--white);
            z-index: 99;
            padding: 24px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-link {
            display: flex;
            align-items: center;
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--slate-700);
            border-radius: var(--radius);
            transition: all 0.2s;
        }
        .mobile-link:hover { background: var(--slate-50); color: var(--blue); }
        .mobile-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 14px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius);
            cursor: pointer;
            border: none;
            font-family: inherit;
            width: 100%;
            margin-top: 8px;
        }
        .mobile-btn-primary {
            background: var(--blue);
            color: var(--white);
        }
        .mobile-btn-ghost {
            background: transparent;
            color: var(--slate-600);
            border: 1px solid var(--slate-200);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding-top: 128px;
            padding-bottom: 80px;
            min-height: 90vh;
            display: flex;
            align-items: center;
            background: linear-gradient(to bottom, var(--slate-50), var(--white), var(--white));
            overflow: hidden;
        }

        .hero-blob {
            position: absolute;
            top: 0;
            right: 0;
            width: 1000px;
            height: 1000px;
            background: var(--blue-glow);
            border-radius: 50%;
            filter: blur(120px);
            transform: translateY(-50%) translateX(33%);
            opacity: 0.6;
            pointer-events: none;
        }

        .hero-grid {
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(to right, #f0f0f0 1px, transparent 1px),
                linear-gradient(to bottom, #f0f0f0 1px, transparent 1px);
            background-size: 64px 64px;
            mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
            -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, #000 70%, transparent 100%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 10;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 48px;
        }

        .hero-text {
            min-width: 0;
            padding-top: 40px;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 12px;
            border-radius: 999px;
            background: #EFF6FF;
            border: 1px solid #BFDBFE;
            color: var(--blue-dark);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 32px;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: var(--slate-900);
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.025em;
        }
        .hero-title span {
            color: var(--blue);
            position: relative;
            display: inline-block;
        }
        .hero-title span::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 12px;
            bottom: -4px;
            left: 0;
            background: #BFDBFE;
            z-index: -1;
            border-radius: 4px;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--slate-500);
            margin-bottom: 40px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }
        .hero-desc b {
            color: var(--slate-800);
        }

        .hero-buttons {
            display: flex;
            flex-direction: column;
            gap: 16px;
            align-items: center;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--slate-200);
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-stat-val {
            font-size: 30px;
            font-weight: 700;
            color: var(--slate-900);
        }
        .hero-stat-label {
            font-size: 14px;
            color: var(--slate-500);
            margin-top: 4px;
        }

        /* ===== Hero Card ===== */
        .hero-card-wrap {
            width: 100%;
            display: flex;
            justify-content: center;
            perspective: 1200px;
        }
        .hero-card-3d {
            position: relative;
            width: 100%;
            max-width: 700px;
            transform-style: preserve-3d;
            transform: rotateX(4deg) rotateY(-8deg);
            transition: transform 0.3s ease;
        }
        .hero-card-3d:hover {
            transform: rotateX(2deg) rotateY(-4deg);
        }
        .hero-card {
            background: rgba(255,255,255,0.9);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255,255,255,0.6);
            padding: 24px;
            box-shadow: 0 20px 50px -12px rgba(0,0,0,0.1);
            transition: box-shadow 0.5s ease;
        }
        .hero-card-3d:hover .hero-card {
            box-shadow: var(--shadow-blue-lg);
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--slate-100);
            flex-wrap: wrap;
            gap: 16px;
        }
        .card-header-left {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .card-logo {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--blue);
        }
        .card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--slate-800);
        }
        .card-subtitle {
            font-size: 12px;
            color: var(--slate-400);
            margin-top: 2px;
        }
        .card-badge-live {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--green-50);
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid var(--green-100);
        }
        .card-badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--green-500);
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        .card-badge-text {
            font-size: 12px;
            font-weight: 600;
            color: var(--green-700);
        }

        .card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 32px;
        }
        .card-stat-box {
            background: linear-gradient(to bottom, #F8FAFC, #F1F5F9);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--slate-200);
        }
        .card-stat-label {
            font-size: 10px;
            font-weight: 700;
            color: var(--slate-500);
            text-transform: uppercase;
            letter-spacing: 1.2px;
            margin-bottom: 8px;
        }
        .card-stat-val {
            font-size: 36px;
            font-weight: 900;
            color: var(--slate-800);
            display: flex;
            align-items: flex-end;
            gap: 8px;
        }
        .card-stat-change {
            font-size: 14px;
            font-weight: 700;
            color: var(--green-600);
            background: var(--green-100);
            padding: 2px 6px;
            border-radius: 4px;
        }
        .card-bar-chart {
            display: flex;
            align-items: flex-end;
            gap: 3px;
            height: 40px;
            margin-top: 16px;
            opacity: 0.8;
        }
        .card-bar {
            flex: 1;
            background: var(--blue);
            border-radius: 2px;
            transition: background 0.2s;
        }
        .card-bar:hover { background: var(--blue-dark); }

        .card-stat-sm {
            background: var(--white);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--slate-100);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .card-uptime-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--slate-600);
            background: var(--slate-50);
            padding: 8px;
            border-radius: var(--radius);
            border: 1px solid var(--slate-100);
            margin-top: 16px;
        }

        .card-protocols {
            background: var(--slate-50);
            border-radius: var(--radius);
            padding: 16px;
            border: 1px solid var(--slate-100);
        }
        .card-protocols-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }
        .card-protocols-label {
            font-size: 10px;
            font-weight: 700;
            color: var(--slate-500);
            text-transform: uppercase;
            letter-spacing: 1.2px;
        }
        .card-protocols-badge {
            font-size: 10px;
            font-family: monospace;
            color: var(--blue);
            background: var(--blue-light);
            padding: 2px 8px;
            border-radius: 4px;
            border: 1px solid #BFDBFE;
        }
        .card-protocol-dots {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 16px;
            position: relative;
            margin-bottom: 8px;
        }
        .card-protocol-dots::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 32px;
            right: 32px;
            height: 2px;
            background: var(--slate-200);
        }
        .card-protocol-dot {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--white);
            border: 2px solid var(--slate-200);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1;
            cursor: pointer;
            transition: all 0.2s;
        }
        .card-protocol-dot:hover {
            transform: scale(1.1);
            border-color: var(--blue);
        }
        .card-protocol-names {
            display: flex;
            justify-content: center;
            gap: 12px;
            font-size: 10px;
            color: var(--slate-500);
        }

        /* Floating badges */
        .hero-float {
            position: absolute;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 20px 40px -10px rgba(0,0,0,0.15);
            padding: 16px;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255,255,255,0.8);
            display: flex;
            align-items: center;
            gap: 16px;
            transform: translateZ(75px);
        }
        .hero-float-1 { right: -32px; top: -16px; }
        .hero-float-2 { left: -24px; bottom: 128px; transform: translateZ(60px); }
        .hero-float-3 {
            right: -16px;
            bottom: -24px;
            background: var(--blue);
            color: var(--white);
            box-shadow: 0 20px 40px -10px rgba(22,119,255,0.4);
            transform: translateZ(90px);
        }
        .hero-float-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .hero-float-1 .hero-float-icon { background: var(--green-50); color: var(--green-600); }
        .hero-float-2 .hero-float-icon { background: var(--purple-50); color: var(--purple-600); }
        .hero-float-3 .hero-float-icon { background: rgba(255,255,255,0.2); color: var(--white); }
        .hero-float-label {
            font-size: 10px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--slate-400);
        }
        .hero-float-3 .hero-float-label { color: #BFDBFE; }
        .hero-float-text {
            font-size: 14px;
            font-weight: 700;
            color: var(--slate-700);
            white-space: nowrap;
        }
        .hero-float-3 .hero-float-text { color: var(--white); font-size: 20px; }

        /* ===== Scroll Marquee ===== */
        .marquee-section {
            padding: 48px 0;
            border-top: 1px solid var(--slate-100);
            border-bottom: 1px solid var(--slate-100);
            background: #FAFAFA;
            overflow: hidden;
        }
        .marquee-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .marquee-header p {
            color: var(--slate-400);
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.2em;
        }
        .marquee-track {
            display: flex;
            gap: 64px;
            width: max-content;
            animation: marquee 25s linear infinite;
        }
        .marquee-item {
            font-size: 24px;
            font-weight: 700;
            color: rgba(148,163,184,0.8);
            white-space: nowrap;
            cursor: default;
            transition: all 0.3s ease;
        }
        .marquee-item:hover {
            color: var(--blue);
            transform: scale(1.1);
        }
        @keyframes marquee {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* ===== Sections General ===== */
        .section {
            padding: 96px 0;
        }

        .section-header {
            text-align: center;
            max-width: 768px;
            margin: 0 auto 64px;
        }
        .section-header h2 {
            font-size: 2.25rem;
            font-weight: 700;
            color: rgba(0,0,0,0.88);
            margin-bottom: 16px;
        }
        .section-header h2 span {
            color: var(--blue);
        }
        .section-header p {
            font-size: 18px;
            color: var(--slate-500);
        }

        /* ===== Services Grid ===== */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .service-card {
            background: var(--slate-50);
            border-radius: var(--radius-lg);
            border: 1px solid var(--slate-100);
            padding: 32px;
            transition: all 0.3s ease;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
        }
        .service-card:hover {
            background: var(--white);
            border-color: rgba(22,119,255,0.2);
            box-shadow: 0 20px 40px -15px rgba(22,119,255,0.1);
            transform: translateY(-4px);
        }
        .service-card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-lg);
            background: var(--blue-light);
            color: var(--blue);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            transition: all 0.3s ease;
        }
        .service-card:hover .service-card-icon {
            background: var(--blue);
            color: var(--white);
            transform: scale(1.1);
        }
        .service-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 12px;
            transition: color 0.2s;
        }
        .service-card:hover h3 { color: var(--blue); }
        .service-card p {
            color: var(--slate-500);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .service-card-link {
            display: flex;
            align-items: center;
            gap: 4px;
            font-weight: 600;
            font-size: 14px;
            color: var(--slate-400);
            transition: all 0.3s ease;
        }
        .service-card:hover .service-card-link { color: var(--blue); }
        .service-card-link svg {
            transition: transform 0.3s ease;
        }
        .service-card:hover .service-card-link svg {
            transform: translateX(4px);
        }
        .service-card-glow {
            position: absolute;
            right: -24px;
            top: -24px;
            width: 96px;
            height: 96px;
            background: var(--blue-light);
            border-radius: 50%;
            filter: blur(32px);
            opacity: 0;
            transition: opacity 0.5s ease;
            pointer-events: none;
        }
        .service-card:hover .service-card-glow { opacity: 0.6; }

        /* ===== Solution Tabs ===== */
        .solution-section {
            padding: 96px 0;
            background: var(--blue-light);
            position: relative;
            overflow: hidden;
        }
        .solution-bg-grid {
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(to right, rgba(22,119,255,0.04) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(22,119,255,0.04) 1px, transparent 1px);
            background-size: 32px 32px;
            opacity: 0.5;
            pointer-events: none;
        }

        .solution-box {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            box-shadow: 0 20px 25px -5px rgba(0,0,0,0.08);
            border: 1px solid var(--white);
            display: flex;
            flex-direction: column;
            min-height: 550px;
            overflow: hidden;
        }

        .solution-tabs {
            display: flex;
            flex-direction: row;
            gap: 4px;
            padding: 16px;
            background: var(--white);
            border-right: none;
            border-bottom: 1px solid var(--slate-100);
            overflow-x: auto;
            flex-shrink: 0;
        }
        .solution-tabs::-webkit-scrollbar { display: none; }

        .solution-tab {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius);
            border: none;
            background: transparent;
            cursor: pointer;
            font-family: inherit;
            font-size: 16px;
            font-weight: 700;
            color: var(--slate-600);
            white-space: nowrap;
            transition: all 0.3s ease;
            flex-shrink: 0;
            border-bottom: 4px solid transparent;
        }
        .solution-tab:hover {
            background: var(--slate-50);
        }
        .solution-tab.active {
            color: var(--blue);
            background: linear-gradient(to top, var(--blue-light), transparent);
            border-bottom-color: var(--blue);
            box-shadow: var(--shadow-sm);
        }
        .solution-tab-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--slate-100);
            color: var(--slate-500);
            transition: all 0.3s ease;
        }
        .solution-tab.active .solution-tab-icon,
        .solution-tab:hover .solution-tab-icon {
            background: var(--blue);
            color: var(--white);
            box-shadow: 0 4px 12px rgba(22,119,255,0.3);
        }

        .solution-panel {
            flex: 1;
            position: relative;
            background: var(--slate-50);
        }
        .solution-panel-inner {
            display: none;
            height: 100%;
        }
        .solution-panel-inner.active {
            display: flex;
            flex-direction: column;
        }
        .solution-panel-img {
            position: relative;
            height: 250px;
            overflow: hidden;
            flex-shrink: 0;
        }
        .solution-panel-img .placeholder-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            background: linear-gradient(135deg, #1e3a5f 0%, #1677FF 50%, #22D3EE 100%);
        }
        .solution-panel-gradient {
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, var(--white) 0%, rgba(255,255,255,0.8) 50%, transparent 100%);
        }
        .solution-panel-body {
            position: relative;
            z-index: 10;
            padding: 32px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .solution-panel-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
            font-size: 14px;
            font-weight: 700;
            color: var(--blue);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .solution-panel-body h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--slate-900);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .solution-panel-body > p {
            font-size: 16px;
            color: var(--slate-600);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .solution-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 24px;
        }
        .solution-tag {
            padding: 6px 12px;
            background: var(--white);
            border: 1px solid var(--slate-200);
            color: var(--slate-600);
            font-size: 14px;
            font-weight: 500;
            border-radius: var(--radius);
        }
        .solution-values {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .solution-values h4 {
            font-size: 12px;
            font-weight: 700;
            color: var(--slate-400);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .solution-values ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .solution-values li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            color: var(--slate-700);
            font-weight: 500;
            font-size: 14px;
        }
        .solution-values li svg {
            color: var(--blue);
            margin-top: 2px;
            flex-shrink: 0;
        }
        .solution-metrics {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .solution-metric-val {
            font-size: 32px;
            font-weight: 700;
            color: var(--slate-900);
            line-height: 1;
        }
        .solution-metric-label {
            font-size: 14px;
            color: var(--slate-500);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 96px 0;
            background: var(--white);
        }
        .cta-box {
            background: linear-gradient(135deg, var(--slate-900) 0%, #1a2a4a 100%);
            border-radius: var(--radius-xl);
            padding: 64px 32px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: rgba(22,119,255,0.15);
            border-radius: 50%;
            filter: blur(80px);
            pointer-events: none;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: rgba(34,211,238,0.1);
            border-radius: 50%;
            filter: blur(60px);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-content h2 {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 18px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-buttons {
            display: flex;
            flex-direction: column;
            gap: 16px;
            align-items: center;
        }
        .cta-btn-primary {
            background: var(--blue);
            color: var(--white);
            padding: 0 32px;
            height: 56px;
            border-radius: var(--radius);
            font-size: 18px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: inherit;
            box-shadow: var(--shadow-blue);
        }
        .cta-btn-primary:hover {
            background: var(--blue-dark);
            transform: translateY(-2px);
        }
        .cta-btn-ghost {
            background: rgba(255,255,255,0.1);
            color: var(--white);
            padding: 0 32px;
            height: 56px;
            border-radius: var(--radius);
            font-size: 18px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255,255,255,0.2);
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: inherit;
        }
        .cta-btn-ghost:hover {
            background: rgba(255,255,255,0.2);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--slate-900);
            color: var(--slate-400);
            padding: 64px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: var(--slate-400);
            max-width: 320px;
        }
        .footer-col h3 {
            font-size: 14px;
            font-weight: 700;
            color: var(--white);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-col a {
            font-size: 14px;
            color: var(--slate-400);
            transition: color 0.2s;
        }
        .footer-col a:hover { color: var(--blue); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 32px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            align-items: center;
            font-size: 14px;
            text-align: center;
        }

        /* ===== Animations ===== */
        .animate-in {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .animate-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Back to top ===== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--blue);
            color: var(--white);
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-blue);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 50;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--blue-dark);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (min-width: 640px) {
            .hero-title { font-size: 3.5rem; }
            .hero-buttons { flex-direction: row; }
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .cta-buttons { flex-direction: row; }
            .solution-values { grid-template-columns: 1fr 1fr; }
        }

        @media (min-width: 768px) {
            .hero-title { font-size: 4rem; }
            .hero-card { padding: 32px; }
            .solution-box { flex-direction: row; }
            .solution-tabs {
                flex-direction: column;
                border-right: 1px solid var(--slate-100);
                border-bottom: none;
                padding: 16px;
                min-width: 220px;
            }
            .solution-tab {
                border-bottom: none;
                border-left: 4px solid transparent;
            }
            .solution-tab.active {
                border-bottom: none;
                border-left-color: var(--blue);
            }
            .solution-panel-img { height: 300px; }
            .solution-panel-body { padding: 32px; }
            .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
        }

        @media (max-width: 1023px) {
            .hero-float { display: none; }
        }
        @media (min-width: 1024px) {
            .nav-links { display: flex; }
            .nav-actions .btn { display: flex; }
            .nav-actions .btn-demo { display: flex; }
            .nav-menu-btn { display: none; }
            .hero-content {
                flex-direction: row;
                text-align: left;
            }
            .hero-text {
                width: 50%;
                flex-shrink: 0;
                text-align: left;
                padding-top: 0;
            }
            .hero-card-wrap {
                width: 50%;
            }
            .hero-desc {
                margin-left: 0;
                margin-right: 0;
            }
            .hero-buttons {
                justify-content: flex-start;
            }
            .hero-stats {
                justify-content: flex-start;
            }
            .hero-float-1 { right: -64px; }
            .hero-float-2 { left: -48px; }
            .services-grid { grid-template-columns: repeat(3, 1fr); }
            .solution-tabs { min-width: 280px; }
            .solution-panel-body { padding: 48px; }
        }

        @media (min-width: 1280px) {
            .hero-title { font-size: 4.5rem; }
            .hero-content { gap: 80px; }
            .services-grid { grid-template-columns: repeat(4, 1fr); }
        }