:root {
            --bg-deep: #060b14;
            --surface-1: #0c1528;
            --surface-2: #111d35;
            --surface-3: #162544;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glow: rgba(79, 172, 254, 0.25);
            --accent-primary: #00e5a0;
            --accent-secondary: #4facfe;
            --accent-warm: #ffb347;
            --accent-rose: #ff6b9d;
            --text-primary: #eef2f9;
            --text-secondary: #9aabc5;
            --text-tertiary: #5e6f89;
            --gradient-hero: linear-gradient(135deg, #00e5a0 0%, #4facfe 45%, #a78bfa 100%);
            --gradient-btn: linear-gradient(135deg, #00e5a0 0%, #4facfe 100%);
            --gradient-card-1: linear-gradient(160deg, rgba(0, 229, 160, 0.08) 0%, rgba(79, 172, 254, 0.06) 100%);
            --gradient-card-2: linear-gradient(160deg, rgba(255, 179, 71, 0.07) 0%, rgba(255, 107, 157, 0.05) 100%);
            --shadow-glow-green: 0 0 40px rgba(0, 229, 160, 0.12);
            --shadow-glow-blue: 0 0 40px rgba(79, 172, 254, 0.1);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-primary);
            font-family: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.65;
            letter-spacing: 0.01em;
            background-image:
                radial-gradient(ellipse at 20% 10%, rgba(0, 229, 160, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 30%, rgba(79, 172, 254, 0.07) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 70%, rgba(167, 139, 250, 0.04) 0%, transparent 50%);
            background-repeat: no-repeat;
            background-attachment: fixed;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-fast);
        }

        /* ========== HEADER ========== */
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 6%;
            position: sticky;
            top: 0;
            background: rgba(6, 11, 20, 0.82);
            backdrop-filter: blur(18px) saturate(140%);
            -webkit-backdrop-filter: blur(18px) saturate(140%);
            z-index: 200;
            border-bottom: 1px solid var(--border-subtle);
            transition: var(--transition-smooth);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 750;
            color: #ffffff;
            letter-spacing: -0.02em;
        }
        .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--gradient-hero);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #060b14;
            font-weight: 800;
            box-shadow: var(--shadow-glow-green);
        }
        .logo .logo-dot {
            color: var(--accent-primary);
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.35;
            }
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
            align-items: center;
        }
        nav a {
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            letter-spacing: 0.02em;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-primary);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }
        nav a.active,
        nav a:hover {
            color: #ffffff;
        }
        nav a.active::after,
        nav a:hover::after {
            width: 100%;
        }
        nav a.active {
            color: var(--accent-primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .btn-gh {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            padding: 8px 16px;
            border-radius: 22px;
            transition: all var(--transition-smooth);
            background: rgba(255, 255, 255, 0.02);
        }
        .btn-gh:hover {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.04);
            box-shadow: 0 0 18px rgba(79, 172, 254, 0.1);
        }
        .btn-gh svg {
            width: 15px;
            height: 15px;
        }
        .btn-header {
            background: var(--gradient-btn);
            color: #060b14;
            padding: 9px 22px;
            border-radius: 22px;
            font-size: 14px;
            font-weight: 650;
            letter-spacing: 0.02em;
            box-shadow: 0 4px 18px rgba(0, 229, 160, 0.2);
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-header:hover {
            box-shadow: 0 6px 28px rgba(0, 229, 160, 0.35);
            transform: translateY(-1px);
        }

        /* ========== MAIN CONTAINER ========== */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HERO SECTION ========== */
        .hero {
            text-align: center;
            padding: 50px 0 20px;
            position: relative;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 229, 160, 0.07) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }
        .badge-live {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 229, 160, 0.08);
            color: var(--accent-primary);
            border: 1px solid rgba(0, 229, 160, 0.2);
            padding: 6px 16px;
            border-radius: 22px;
            font-size: 13px;
            font-weight: 550;
            margin-bottom: 22px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.03em;
        }
        .badge-live .live-dot {
            width: 8px;
            height: 8px;
            background: var(--accent-primary);
            border-radius: 50%;
            animation: live-pulse 1.6s ease-in-out infinite;
            box-shadow: 0 0 10px var(--accent-primary);
        }
        @keyframes live-pulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(1.7);
            }
        }
        .hero h1 {
            font-size: clamp(34px, 5.5vw, 54px);
            margin-bottom: 16px;
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            position: relative;
            z-index: 1;
        }
        .hero .subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 32px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.02em;
            line-height: 1.7;
        }
        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 44px;
            position: relative;
            z-index: 1;
        }
        .btn-primary {
            background: var(--gradient-btn);
            color: #060b14;
            padding: 15px 36px;
            border-radius: 28px;
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.03em;
            box-shadow: 0 6px 24px rgba(0, 229, 160, 0.22);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            box-shadow: 0 10px 34px rgba(0, 229, 160, 0.38);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-subtle);
            color: #ffffff;
            padding: 15px 36px;
            border-radius: 28px;
            font-size: 16px;
            font-weight: 550;
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: 0 4px 20px rgba(255, 255, 255, 0.04);
        }

        /* Video Wrapper */
        .video-wrapper {
            position: relative;
            padding-bottom: 38%;
            height: 0;
            overflow: hidden;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            background: #000;
            margin-bottom: 70px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
            position: relative;
            z-index: 1;
        }
        .video-wrapper iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 0;
            border-radius: var(--radius-lg);
        }

        /* ========== STATS STRIP ========== */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 80px;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            background: var(--surface-1);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .stat-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--gradient-btn);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .stat-item:hover::before {
            opacity: 1;
        }
        .stat-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow-blue);
            transform: translateY(-3px);
        }
        .stat-value {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-tertiary);
            margin-top: 4px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        /* ========== FEATURE CARDS ========== */
        .section-tag {
            display: inline-block;
            background: rgba(0, 229, 160, 0.07);
            color: var(--accent-primary);
            padding: 5px 16px;
            border-radius: 20px;
            font-size: 12.5px;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            color: #ffffff;
            font-weight: 750;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
        }
        .section-header .section-sub {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 550px;
            margin: 0 auto;
            letter-spacing: 0.02em;
        }

        .top-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            margin-bottom: 90px;
        }
        .feature-card {
            background: var(--surface-1);
            border: 1px solid var(--border-subtle);
            padding: 28px 22px;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            cursor: default;
        }
        .feature-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow-blue);
            transform: translateY(-4px);
        }
        .feature-card .icon-wrap {
            width: 48px;
            height: 48px;
            background: var(--gradient-card-1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
            transition: var(--transition-smooth);
        }
        .feature-card:hover .icon-wrap {
            transform: scale(1.08);
        }
        .feature-card h3 {
            font-size: 16px;
            margin-bottom: 7px;
            color: #ffffff;
            font-weight: 650;
            letter-spacing: 0.01em;
        }
        .feature-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.55;
            letter-spacing: 0.02em;
        }

        /* ========== SPEED VISUALIZATION SECTION (创意板块) ========== */
        .speed-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-bottom: 90px;
            background: var(--surface-1);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            position: relative;
            overflow: hidden;
        }
        .speed-showcase::after {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(0, 229, 160, 0.1) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }
        .speed-visual {
            display: flex;
            flex-direction: column;
            gap: 16px;
            position: relative;
            z-index: 1;
        }
        .speed-bar-wrap {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .speed-bar-label {
            font-size: 12px;
            color: var(--text-tertiary);
            width: 70px;
            text-align: right;
            letter-spacing: 0.03em;
            flex-shrink: 0;
        }
        .speed-bar-track {
            flex: 1;
            height: 8px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 10px;
            overflow: hidden;
        }
        .speed-bar-fill {
            height: 100%;
            border-radius: 10px;
            background: var(--gradient-btn);
            transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
        }
        .speed-bar-fill::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 10px;
            height: 10px;
            background: #fff;
            border-radius: 50%;
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.8);
        }
        .speed-info h3 {
            font-size: 24px;
            color: #ffffff;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }
        .speed-info .highlight-num {
            font-size: 52px;
            font-weight: 900;
            letter-spacing: -0.03em;
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
        }
        .speed-info p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-top: 8px;
            letter-spacing: 0.02em;
        }

        /* ========== TRUST INDICATORS (创意板块) ========== */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-bottom: 80px;
        }
        .trust-card {
            background: var(--surface-2);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .trust-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 30px rgba(0, 229, 160, 0.06);
            transform: translateY(-3px);
        }
        .trust-card .trust-badge {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            background: var(--gradient-card-2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
        }
        .trust-card h4 {
            font-size: 16px;
            color: #ffffff;
            font-weight: 650;
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }
        .trust-card p {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
            line-height: 1.5;
        }

        /* ========== TECH SECTION ========== */
        .tech-arch-section {
            background: var(--surface-1);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            margin-bottom: 70px;
        }
        .tech-arch-section h2 {
            font-size: 26px;
            color: #ffffff;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .tech-arch-section .tech-intro {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 28px;
            letter-spacing: 0.02em;
            line-height: 1.7;
        }
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .tech-item {
            background: rgba(0, 0, 0, 0.25);
            padding: 22px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
        }
        .tech-item:hover {
            border-color: var(--border-glow);
            box-shadow: 0 0 22px rgba(79, 172, 254, 0.06);
        }
        .tech-item h4 {
            color: var(--accent-primary);
            margin-bottom: 7px;
            font-size: 15px;
            font-weight: 650;
            letter-spacing: 0.02em;
        }
        .tech-item p {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
            line-height: 1.5;
            margin: 0;
        }

        /* ========== SCENARIOS ========== */
        .scenarios-section {
            background: var(--surface-1);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            margin-bottom: 70px;
        }
        .scenarios-section h2 {
            font-size: 26px;
            color: #ffffff;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
        }
        .scenarios-section .scenario-intro {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 28px;
            letter-spacing: 0.02em;
            line-height: 1.7;
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }
        .scenario-item {
            background: rgba(255, 255, 255, 0.015);
            padding: 22px 20px;
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent-primary);
            transition: all var(--transition-smooth);
        }
        .scenario-item:hover {
            background: rgba(255, 255, 255, 0.03);
            border-left-color: var(--accent-secondary);
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.04);
        }
        .scenario-item h4 {
            color: #ffffff;
            margin-bottom: 6px;
            font-weight: 650;
            letter-spacing: 0.02em;
        }
        .scenario-item p {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
            line-height: 1.5;
            margin: 0;
        }

        /* ========== HISTORY SECTION ========== */
        .history-section {
            background: var(--surface-1);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            margin-bottom: 70px;
        }
        .history-section h2 {
            font-size: 26px;
            color: #ffffff;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .history-section p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
            line-height: 1.7;
        }
        .history-section p:last-child {
            margin-bottom: 0;
        }

        /* ========== TIMELINE (创意板块) ========== */
        .timeline-section {
            margin-bottom: 80px;
        }
        .timeline-section h2 {
            text-align: center;
            font-size: 26px;
            color: #ffffff;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 36px;
        }
        .timeline-track {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .timeline-track::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-secondary), transparent);
            opacity: 0.5;
            z-index: 0;
        }
        .timeline-node {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .timeline-dot {
            width: 16px;
            height: 16px;
            background: var(--accent-primary);
            border-radius: 50%;
            margin: 0 auto 14px;
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.5);
            position: relative;
            z-index: 2;
        }
        .timeline-node:nth-child(2) .timeline-dot {
            background: var(--accent-secondary);
            box-shadow: 0 0 16px rgba(79, 172, 254, 0.5);
        }
        .timeline-node:nth-child(3) .timeline-dot {
            background: var(--accent-warm);
            box-shadow: 0 0 16px rgba(255, 179, 71, 0.5);
        }
        .timeline-node:nth-child(4) .timeline-dot {
            background: var(--accent-rose);
            box-shadow: 0 0 16px rgba(255, 107, 157, 0.5);
        }
        .timeline-year {
            font-size: 20px;
            font-weight: 750;
            color: #ffffff;
            letter-spacing: 0.02em;
            margin-bottom: 4px;
        }
        .timeline-desc {
            font-size: 12.5px;
            color: var(--text-secondary);
            letter-spacing: 0.03em;
            line-height: 1.5;
        }

        /* ========== CTA BANNER (创意板块) ========== */
        .cta-banner {
            background: var(--surface-2);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            margin-bottom: 80px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-glow-green);
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 229, 160, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: 28px;
            color: #ffffff;
            font-weight: 750;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.02em;
            line-height: 1.6;
        }
        .cta-banner .btn-primary {
            position: relative;
            z-index: 1;
            font-size: 17px;
            padding: 16px 40px;
            border-radius: 30px;
        }

        /* ========== FOOTER ========== */
        footer {
            background: #030810;
            border-top: 1px solid var(--border-subtle);
            padding: 50px 6% 30px;
            color: var(--text-secondary);
            font-size: 13.5px;
            letter-spacing: 0.02em;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            color: #ffffff;
            margin-bottom: 14px;
            font-size: 19px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: var(--text-tertiary);
        }
        .footer-col h4 {
            color: #ffffff;
            margin-bottom: 14px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 9px;
            color: var(--text-tertiary);
            transition: var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-tertiary);
            letter-spacing: 0.03em;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .top-features {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .tech-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-track {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-track::before {
                display: none;
            }
            .speed-showcase {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            header {
                padding: 14px 4%;
            }
            nav ul {
                display: none;
            }
            .hero h1 {
                font-size: 28px;
            }
            .top-features,
            .stats-strip,
            .tech-grid,
            .trust-grid,
            .scenario-grid,
            .footer-grid,
            .timeline-track {
                grid-template-columns: 1fr;
            }
            .speed-showcase {
                padding: 28px 20px;
            }
            .tech-arch-section,
            .scenarios-section,
            .history-section {
                padding: 28px 20px;
            }
            .cta-banner {
                padding: 32px 20px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
            .video-wrapper {
                padding-bottom: 56%;
            }
        }