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

        :root {
            --cyan: #22d3ee;
            --cyan-soft: #a5f3fc;
            --cyan-glow: rgba(34, 211, 238, 0.35);
            --bg-deep: #05070a;
            --bg-card: #0e131f;
            --border-subtle: #1e2a3e;
            --text-primary: #eef2ff;
            --text-secondary: #9ca8bf;
            --text-muted: #6c86a3;
            --radius-lg: 32px;
            --radius-full: 60px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
            background-color: #0a0c12;
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ── Header ── */
        .header {
            background: rgba(10, 12, 18, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(56, 189, 248, 0.12);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 16px 0;
            gap: 18px;
        }
        .logo {
            font-size: 1.9rem;
            font-weight: 700;
            letter-spacing: -1px;
            background: linear-gradient(120deg, #a5f3fc, #22d3ee);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            list-style: none;
            font-weight: 500;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            color: #cbd5e6;
            transition: var(--transition-fast);
            font-size: 0.95rem;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--cyan);
            text-shadow: 0 0 6px var(--cyan-glow);
        }
        .btn-outline-light {
            background: transparent;
            border: 1px solid var(--cyan);
            color: var(--cyan);
            padding: 8px 20px;
            border-radius: var(--radius-full);
            font-weight: 500;
            transition: var(--transition-fast);
            cursor: pointer;
            font-size: 0.9rem;
            white-space: nowrap;
            text-decoration: none;
            display: inline-block;
        }
        .btn-outline-light:hover {
            background: rgba(34, 211, 238, 0.1);
            box-shadow: 0 0 10px var(--cyan-glow);
        }

        /* ── Hero ── */
        .hero {
            padding: 90px 0 80px;
            background: radial-gradient(circle at 80% 20%, #11161f, #05070a);
            position: relative;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: -120px;
            right: -180px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.04) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }
        .hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 50px;
            position: relative;
            z-index: 1;
        }
        .hero-content {
            flex: 1.2;
            min-width: 300px;
        }
        .badge-glow {
            background: rgba(34, 211, 238, 0.1);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            border: 0.5px solid rgba(34, 211, 238, 0.3);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 500;
            display: inline-block;
            margin-bottom: 24px;
            color: var(--cyan-soft);
            letter-spacing: 0.4px;
        }
        .hero-content h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 800;
            line-height: 1.18;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            background: linear-gradient(to right, #f0f9ff, #7dd3fc);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 90%;
            margin-bottom: 32px;
            border-left: 2px solid var(--cyan);
            padding-left: 18px;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-glow {
            background: #0f172a;
            border: 1.5px solid var(--cyan);
            color: #e2efff;
            padding: 12px 30px;
            border-radius: 44px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition-fast);
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.15);
            display: inline-block;
            font-size: 0.95rem;
        }
        .btn-primary-glow:hover {
            background: rgba(34, 211, 238, 0.08);
            border-color: #67e8f9;
            box-shadow: 0 0 20px var(--cyan-glow);
            transform: scale(1.02);
        }
        .btn-dark {
            background: #1e293b;
            color: #cbd5e6;
            padding: 12px 30px;
            border-radius: 44px;
            font-weight: 500;
            text-decoration: none;
            border: 1px solid #334155;
            transition: var(--transition-fast);
            font-size: 0.95rem;
            display: inline-block;
        }
        .btn-dark:hover {
            border-color: #556b85;
            background: #253044;
        }
        .hero-mockup {
            flex: 0.9;
            background: #0f111a;
            border-radius: 44px;
            border: 1px solid #1e293b;
            box-shadow: 0 30px 40px -20px rgba(0, 0, 0, 0.8);
            overflow: hidden;
            min-width: 280px;
            max-width: 440px;
        }
        .mock-chat {
            padding: 18px 16px 22px;
            background: #090c12;
        }
        .mock-header {
            display: flex;
            justify-content: space-between;
            padding: 0 6px 14px;
            color: #6c86a3;
            font-size: 0.7rem;
            border-bottom: 1px solid #1e2a3a;
        }
        .mock-msg-item {
            background: #11161f;
            margin: 14px 0;
            padding: 12px 14px;
            border-radius: 18px;
            border-left: 3px solid var(--cyan);
        }
        .msg-name {
            font-weight: 700;
            color: #b9d0f0;
            font-size: 0.85rem;
        }
        .msg-text {
            font-size: 0.8rem;
            color: #9aaebe;
            margin-top: 2px;
        }
        .encrypt-tag {
            font-size: 0.65rem;
            color: #2dd4bf;
            display: inline-block;
            margin-top: 4px;
        }

        /* ── Stats Bar ── */
        .stats-bar {
            background: #03060b;
            padding: 26px 0;
            border-bottom: 1px solid #1e293b;
        }
        .stats-grid {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 28px;
            text-align: center;
        }
        .stat h4 {
            font-size: 1.75rem;
            font-weight: 700;
            background: linear-gradient(135deg, #94a3b8, #cbd5e1);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .stat span {
            font-size: 0.8rem;
            color: var(--text-muted);
            letter-spacing: 0.3px;
        }

        /* ── Sections ── */
        .feat-section {
            padding: 80px 0;
            background: #05080f;
        }
        .section-title {
            text-align: center;
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-desc {
            text-align: center;
            color: #8a99b4;
            max-width: 640px;
            margin: 0 auto 52px;
            font-size: 1rem;
        }
        .feat-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            border: 1px solid var(--border-subtle);
            transition: var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--cyan), transparent);
            opacity: 0;
            transition: opacity 0.3s;
        }
        .card:hover {
            border-color: var(--cyan);
            box-shadow: 0 14px 30px -12px rgba(34, 211, 238, 0.18);
            transform: translateY(-2px);
        }
        .card:hover::before {
            opacity: 0.7;
        }
        .card-icon {
            font-size: 2.4rem;
            margin-bottom: 18px;
            display: block;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #e2efff;
        }
        .card p {
            font-size: 0.9rem;
            color: #8a99b4;
            line-height: 1.5;
        }
        .card ul {
            list-style: none;
            margin-top: 8px;
        }
        .card ul li {
            font-size: 0.85rem;
            color: #9aaebe;
            padding: 3px 0;
            padding-left: 16px;
            position: relative;
        }
        .card ul li::before {
            content: '›';
            position: absolute;
            left: 0;
            color: var(--cyan);
            font-weight: 700;
        }

        /* ── Audience Section ── */
        .audience-section {
            padding: 70px 0;
            background: #080b14;
            border-top: 1px solid #111826;
            border-bottom: 1px solid #111826;
        }
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .audience-card {
            background: #0d111c;
            border-radius: 24px;
            padding: 26px 22px;
            border: 1px solid #1a2436;
            text-align: center;
            transition: var(--transition-fast);
        }
        .audience-card:hover {
            border-color: #33475e;
            background: #101622;
        }
        .audience-card .icon-large {
            font-size: 2.8rem;
            display: block;
            margin-bottom: 12px;
        }
        .audience-card h4 {
            font-weight: 700;
            color: #dce6f5;
            margin-bottom: 6px;
        }
        .audience-card p {
            font-size: 0.85rem;
            color: #7e90ab;
        }

        /* ── Internal Link Cards ── */
        .link-cards-section {
            padding: 80px 0;
            background: #05080f;
        }
        .link-cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .link-card {
            background: #0e131f;
            border-radius: 28px;
            padding: 28px 22px;
            border: 1px solid #1e2a3e;
            text-decoration: none;
            color: inherit;
            transition: var(--transition-fast);
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .link-card:hover {
            border-color: var(--cyan);
            box-shadow: 0 10px 24px -10px rgba(34, 211, 238, 0.2);
            transform: translateY(-2px);
        }
        .link-card .lc-icon {
            font-size: 2.2rem;
        }
        .link-card h4 {
            font-weight: 700;
            color: #e2efff;
            font-size: 1.05rem;
        }
        .link-card p {
            font-size: 0.85rem;
            color: #8a99b4;
            flex: 1;
        }
        .link-card .lc-arrow {
            font-weight: 600;
            color: var(--cyan);
            font-size: 0.85rem;
            letter-spacing: 0.3px;
        }

        /* ── SEO Content Block ── */
        .seo-content {
            padding: 70px 0 80px;
            background: #060910;
            border-top: 1px solid #111826;
        }
        .seo-content .prose {
            max-width: 860px;
            margin: 0 auto;
            color: #9aaebe;
            font-size: 0.95rem;
            line-height: 1.85;
        }
        .seo-content .prose h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #dce6f5;
            margin: 36px 0 14px;
            letter-spacing: -0.3px;
        }
        .seo-content .prose h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #c5d4eb;
            margin: 24px 0 10px;
        }
        .seo-content .prose p {
            margin-bottom: 14px;
        }
        .seo-content .prose strong {
            color: #cbd5e6;
            font-weight: 600;
        }
        .seo-content .prose .highlight-box {
            background: #0e131f;
            border-left: 3px solid var(--cyan);
            padding: 16px 20px;
            border-radius: 0 16px 16px 0;
            margin: 20px 0;
            font-style: italic;
            color: #b9c8df;
        }

        /* ── Testimonials ── */
        .testimonial-section {
            padding: 70px 0;
            background: #080b14;
            border-top: 1px solid #111826;
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .testimonial-card {
            background: #0d111c;
            border-radius: 24px;
            padding: 24px 22px;
            border: 1px solid #1a2436;
            position: relative;
        }
        .testimonial-card .quote-mark {
            font-size: 3rem;
            color: var(--cyan);
            opacity: 0.35;
            line-height: 1;
            position: absolute;
            top: 12px;
            left: 18px;
        }
        .testimonial-card .t-text {
            font-size: 0.9rem;
            color: #b0bfd4;
            margin: 14px 0 16px;
            padding-left: 8px;
            line-height: 1.6;
        }
        .testimonial-card .t-author {
            font-weight: 700;
            color: #dce6f5;
            font-size: 0.85rem;
        }
        .testimonial-card .t-role {
            font-size: 0.75rem;
            color: #6c86a3;
        }

        /* ── CTA ── */
        .cta-block {
            background: linear-gradient(95deg, #0b1120, #03070f);
            border-top: 1px solid #1e2a3a;
            padding: 64px 0;
            text-align: center;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cta-block p {
            color: #8a99b4;
            margin-bottom: 24px;
            font-size: 1rem;
        }

        /* ── Footer ── */
        .footer {
            background: #020408;
            padding: 50px 0 28px;
            border-top: 1px solid #111826;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 38px;
        }
        .footer-col h5 {
            font-weight: 600;
            color: #b9c8df;
            margin-bottom: 10px;
            font-size: 0.9rem;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            color: #6c86a3;
            text-decoration: none;
            font-size: 0.85rem;
            display: block;
            margin-bottom: 6px;
            transition: var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--cyan);
        }
        .copyright {
            text-align: center;
            margin-top: 42px;
            color: #4c617b;
            font-size: 0.8rem;
        }

        /* ── Responsive ── */
        @media (max-width: 780px) {
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .nav-links {
                gap: 16px;
                font-size: 0.85rem;
            }
            .hero {
                padding: 50px 0 50px;
            }
            .hero-grid {
                gap: 32px;
            }
            .hero-mockup {
                max-width: 100%;
            }
            .btn-group {
                flex-direction: column;
                align-items: flex-start;
            }
            .stats-grid {
                justify-content: center;
                gap: 20px;
            }
            .seo-content .prose {
                font-size: 0.9rem;
            }
        }

        @media (max-width: 480px) {
            .nav-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                gap: 12px;
                flex-wrap: wrap;
            }
            .container {
                padding: 0 16px;
            }
            .card,
            .audience-card,
            .link-card,
            .testimonial-card {
                padding: 20px 16px;
            }
        }