:root {
            --bg-primary: #0b0914;
            --bg-secondary: #12101f;
            --bg-card: #16132b;
            --bg-elevated: #1d1838;
            --text-primary: #f0edf7;
            --text-secondary: #a8a0c0;
            --text-muted: #6e6590;
            --brand: #00e5b0;
            --brand-glow: rgba(0, 229, 176, 0.35);
            --brand-dim: rgba(0, 229, 176, 0.12);
            --accent: #8b5cf6;
            --accent-glow: rgba(139, 92, 246, 0.3);
            --accent-dim: rgba(139, 92, 246, 0.1);
            --gradient-main: linear-gradient(135deg, #00e5b0 0%, #7c6cf0 50%, #8b5cf6 100%);
            --gradient-hero: linear-gradient(160deg, #0b0914 0%, #12102a 40%, #0f0c20 100%);
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glow: rgba(0, 229, 176, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --font-sans: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(0, 229, 176, 0.15);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a {
            color: var(--brand);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: #5ff5cf;
        }

        .skip-link {
            position: absolute;
            left: -999px;
            top: 0;
            background: var(--brand);
            color: #0b0914;
            padding: 10px 20px;
            border-radius: 0 0 var(--radius-sm) 0;
            font-weight: 700;
            z-index: 9999;
        }
        .skip-link:focus {
            left: 0;
        }

        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 9, 20, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .logo .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 900;
            color: #0b0914;
            box-shadow: 0 0 20px var(--brand-glow);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav a {
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .nav a:hover {
            color: var(--text-primary);
            background: var(--bg-elevated);
        }
        .nav a.is-active {
            color: var(--brand);
            background: var(--brand-dim);
            font-weight: 600;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.88rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
            text-align: center;
        }
        .btn-primary {
            background: var(--brand);
            color: #0b0914;
            box-shadow: 0 0 24px var(--brand-glow);
        }
        .btn-primary:hover {
            background: #5ff5cf;
            color: #0b0914;
            box-shadow: 0 0 36px var(--brand-glow);
            transform: translateY(-1px);
        }
        .btn-ghost {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
        }
        .btn-ghost:hover {
            border-color: var(--brand);
            color: var(--brand);
        }
        .btn-outline {
            background: transparent;
            color: var(--brand);
            border: 1.5px solid var(--brand);
        }
        .btn-outline:hover {
            background: var(--brand-dim);
            border-color: var(--brand);
        }
        .btn-lg {
            padding: 14px 30px;
            font-size: 1rem;
            border-radius: var(--radius-md);
        }

        .menu-btn {
            display: none;
            background: var(--bg-elevated);
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.2rem;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all 0.25s ease;
        }
        .menu-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        /* Hero */
        .hero {
            background: var(--gradient-hero);
            padding: 70px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, var(--brand-glow) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 50px;
            background: var(--brand-dim);
            color: var(--brand);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
            border: 1px solid var(--border-glow);
        }
        .eyebrow::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.5);
            }
        }

        .hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 18px;
            color: var(--text-primary);
        }
        .hero h1 .highlight {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero .lead {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .hero-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .hero-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hero-meta b {
            color: var(--brand);
            font-weight: 700;
        }

        /* Device Art */
        .device-art {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .device-window {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px 22px 24px;
            width: 100%;
            max-width: 380px;
            box-shadow: var(--shadow-card), 0 0 60px var(--brand-glow);
            position: relative;
        }
        .device-window::before {
            content: '';
            position: absolute;
            inset: -1px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, var(--brand-glow), transparent 40%, var(--accent-glow));
            z-index: -1;
            opacity: 0.5;
        }
        .device-bar {
            display: flex;
            gap: 6px;
            margin-bottom: 16px;
        }
        .device-bar i {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--text-muted);
            display: block;
        }
        .device-bar i:first-child {
            background: #ff5f57;
        }
        .device-bar i:nth-child(2) {
            background: #febc2e;
        }
        .device-bar i:nth-child(3) {
            background: #28c840;
        }
        .status-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-elevated);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            margin-bottom: 16px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--brand);
            border: 1px solid var(--border-glow);
        }
        .pulse {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand);
            animation: pulse-dot 1.5s infinite;
        }
        .speed-ring {
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            padding: 16px 0;
        }
        .speed-ring>div {
            text-align: center;
            background: radial-gradient(circle, var(--brand-dim) 0%, transparent 70%);
            border-radius: 50%;
            padding: 26px 34px;
            border: 2px solid var(--brand);
            box-shadow: 0 0 30px var(--brand-glow);
        }
        .speed-ring strong {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            display: block;
            line-height: 1.1;
        }
        .speed-ring span {
            font-size: 0.78rem;
            color: var(--text-secondary);
        }
        .node-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .node-list li {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-elevated);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
        }
        .node-list li b {
            font-weight: 600;
            color: var(--brand);
            font-size: 0.75rem;
            padding: 2px 8px;
            background: var(--brand-dim);
            border-radius: 50px;
        }

        /* Stats */
        .stats {
            padding: 36px 0;
            border-bottom: 1px solid var(--border-subtle);
            background: var(--bg-secondary);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .stat b {
            display: block;
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .stat span {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 4px;
            display: block;
        }

        /* Sections */
        .section {
            padding: 70px 0;
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }
        .kicker {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--brand);
            background: var(--brand-dim);
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 14px;
            border: 1px solid var(--border-glow);
        }
        .section-head h2 {
            font-size: clamp(1.5rem, 2.8vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-head p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* Cards Grid */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }
        .card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-main);
            opacity: 0;
            transition: opacity 0.35s ease;
        }
        .card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .card:hover::after {
            opacity: 1;
        }

        .icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--brand-dim);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--brand);
            border: 1px solid var(--border-glow);
        }
        .icon svg {
            width: 24px;
            height: 24px;
        }

        .card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Platform cards */
        .platform-card {
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .platform-card .os {
            font-size: 0.72rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 6px;
        }
        .platform-card h3 {
            font-size: 1.15rem;
        }
        .platform-card .btn {
            margin-top: 12px;
            width: 100%;
        }

        /* Steps */
        .steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .step {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            text-align: center;
            position: relative;
            transition: all 0.35s ease;
        }
        .step:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .step b {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--gradient-main);
            color: #0b0914;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .step h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* Compare Table */
        .compare {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            background: var(--bg-card);
        }
        .compare table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.88rem;
        }
        .compare th,
        .compare td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-subtle);
        }
        .compare th {
            background: var(--bg-elevated);
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .compare th:first-child {
            color: var(--brand);
        }
        .compare td {
            color: var(--text-secondary);
        }
        .compare tr:last-child td {
            border-bottom: none;
        }
        .compare tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }

        /* Blog cards */
        .blog-card {
            display: block;
            color: var(--text-primary);
        }
        .blog-card .meta {
            font-size: 0.72rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--brand);
            font-weight: 600;
            margin-bottom: 8px;
        }
        .blog-card:hover {
            color: var(--text-primary);
            border-color: var(--border-glow);
        }

        /* Search Links */
        .search-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .search-links a {
            padding: 10px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }
        .search-links a:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: var(--brand-dim);
            transform: translateY(-2px);
        }

        /* CTA Band */
        .cta-band {
            background: var(--gradient-hero);
            padding: 70px 0;
            border-top: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
        }
        .cta-band::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, var(--brand-glow) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-band h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-band p {
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        /* Footer */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            max-width: 300px;
        }
        .footer h3 {
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .footer a {
            display: block;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            transition: color 0.25s ease;
        }
        .footer a:hover {
            color: var(--brand);
        }
        .copy {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* AI-specific creative section */
        .ai-orbit {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin-top: 30px;
        }
        .ai-orbit-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            min-height: 260px;
        }
        .orbit-center {
            position: relative;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.2rem;
            font-weight: 900;
            color: #0b0914;
            box-shadow: 0 0 50px var(--brand-glow);
            z-index: 2;
        }
        .orbit-ring {
            position: absolute;
            border: 1.5px dashed var(--brand);
            border-radius: 50%;
            animation: spin 20s linear infinite;
        }
        .orbit-ring.r1 {
            width: 200px;
            height: 200px;
            animation-duration: 18s;
        }
        .orbit-ring.r2 {
            width: 280px;
            height: 280px;
            animation-duration: 26s;
            border-color: var(--accent);
            animation-direction: reverse;
        }
        .orbit-dot {
            position: absolute;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 16px var(--brand-glow);
        }
        .orbit-dot.d2 {
            background: var(--accent);
            box-shadow: 0 0 16px var(--accent-glow);
        }

        @keyframes spin {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        .ai-orbit-text h3 {
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .ai-orbit-text p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            margin-bottom: 14px;
        }
        .ai-orbit-text ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .ai-orbit-text ul li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .ai-orbit-text ul li::before {
            content: '⚡';
            color: var(--brand);
            font-size: 0.9rem;
        }

        /* Creative section — lightning path */
        .lightning-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .lightning-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            transition: all 0.35s ease;
        }
        .lightning-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .lightning-card .lc-icon {
            font-size: 1.8rem;
            flex-shrink: 0;
            line-height: 1;
        }
        .lightning-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .lightning-card p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .ai-orbit {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .ai-orbit-text ul {
                align-items: center;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .device-art {
                order: -1;
            }
            .device-window {
                max-width: 320px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: auto;
                padding: 12px 0;
                flex-wrap: wrap;
            }
            .nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--bg-secondary);
                border-radius: var(--radius-sm);
                padding: 12px;
                border: 1px solid var(--border-subtle);
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                padding: 10px 14px;
                width: 100%;
                text-align: center;
            }
            .menu-btn {
                display: flex;
            }
            .header-cta .btn-ghost {
                display: none;
            }
            .grid-3,
            .grid-4,
            .steps,
            .lightning-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero {
                padding: 40px 0;
            }
            .section {
                padding: 48px 0;
            }
            .stats-grid {
                gap: 16px;
            }
            .compare th,
            .compare td {
                padding: 12px 14px;
                font-size: 0.78rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-meta {
                gap: 14px;
                font-size: 0.78rem;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .device-window {
                padding: 14px 16px 18px;
            }
            .speed-ring>div {
                padding: 18px 24px;
            }
            .speed-ring strong {
                font-size: 1.5rem;
            }
            .card,
            .step {
                padding: 20px 16px;
            }
            .btn-lg {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
        }