/* roulang page: index */
:root {
            --bg-deep: #080C14;
            --surface-glass: rgba(12, 18, 30, 0.75);
            --neon-cyan: #00F2FE;
            --neon-purple: #A855F7;
            --neon-green: #00E676;
            --text-white: #FFFFFF;
            --text-gray: #A0AEC0;
            --text-muted: #718096;
            --danger-red: #FF5252;
            --border-cyan: rgba(0, 242, 254, 0.15);
            --border-cyan-hover: rgba(168, 85, 247, 0.5);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-pill: 50px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow-cyan: 0 0 18px rgba(0, 242, 254, 0.4);
            --shadow-glow-cyan-lg: 0 0 30px rgba(0, 242, 254, 0.55);
            --shadow-glow-purple: 0 0 20px rgba(168, 85, 247, 0.25);
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
            --font-sans: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--header-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-gray);
            background-color: var(--bg-deep);
            overflow-x: hidden;
            min-height: 100vh;
            position: relative;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            background:
                repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.025) 0px, rgba(255, 255, 255, 0.025) 1px, transparent 1px, transparent 48px),
                repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.025) 0px, rgba(255, 255, 255, 0.025) 1px, transparent 1px, transparent 48px);
            opacity: 0.6;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: transparent;
            transition: background var(--transition-smooth), backdrop-filter var(--transition-smooth), box-shadow var(--transition-smooth);
            border-bottom: 1px solid transparent;
        }

        header.scrolled {
            background: rgba(8, 12, 20, 0.78);
            backdrop-filter: blur(16px) saturate(140%);
            -webkit-backdrop-filter: blur(16px) saturate(140%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
        }

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

        .logo {
            font-size: 20px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            letter-spacing: -0.3px;
            white-space: nowrap;
            position: relative;
            z-index: 1001;
        }

        .logo span {
            font-weight: 400;
            font-size: 15px;
            -webkit-text-fill-color: var(--text-gray);
            color: var(--text-gray);
            background: none;
            -webkit-background-clip: unset;
            background-clip: unset;
            margin-left: 2px;
        }

        nav.desktop-nav {
            display: flex;
            align-items: center;
            gap: 40px;
            list-style: none;
        }

        nav.desktop-nav a {
            font-size: 15px;
            color: var(--text-gray);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
            letter-spacing: 0.2px;
        }

        nav.desktop-nav a:hover,
        nav.desktop-nav a:focus-visible {
            color: var(--text-white);
        }

        nav.desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 2px;
            transition: transform var(--transition-fast);
            transform-origin: center;
        }

        nav.desktop-nav a:hover::after,
        nav.desktop-nav a:focus-visible::after,
        nav.desktop-nav a.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        nav.desktop-nav a.active {
            color: var(--neon-cyan);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            z-index: 1001;
            cursor: pointer;
            background: none;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
            transform-origin: center;
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(8, 12, 20, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            list-style: none;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

        .mobile-menu.active {
            opacity: 1;
            pointer-events: all;
        }

        .mobile-menu a {
            font-size: 22px;
            color: var(--text-white);
            font-weight: 600;
            letter-spacing: 0.5px;
            transition: color var(--transition-fast);
        }

        .mobile-menu a:hover {
            color: var(--neon-cyan);
        }

        section {
            position: relative;
            z-index: 1;
            padding: 90px 0;
        }

        #hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            position: relative;
            overflow: hidden;
        }

        #hero .hero-bg-img {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            filter: blur(1px) saturate(0.6);
            pointer-events: none;
        }

        #hero .hero-grid-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            background:
                repeating-linear-gradient(0deg, rgba(0, 242, 254, 0.03) 0px, rgba(0, 242, 254, 0.03) 1px, transparent 1px, transparent 40px),
                repeating-linear-gradient(90deg, rgba(0, 242, 254, 0.03) 0px, rgba(0, 242, 254, 0.03) 1px, transparent 1px, transparent 40px);
        }

        .floating-particles {
            position: absolute;
            inset: 0;
            z-index: 2;
            pointer-events: none;
            overflow: hidden;
        }

        .particle {
            position: absolute;
            border-radius: 50%;
            background: var(--neon-cyan);
            box-shadow: 0 0 12px var(--neon-cyan), 0 0 30px rgba(0, 242, 254, 0.4);
            animation: float-particle 6s ease-in-out infinite;
            opacity: 0;
        }

        .particle:nth-child(1) {
            width: 3px;
            height: 3px;
            top: 18%;
            left: 12%;
            animation-delay: 0s;
            animation-duration: 5.5s;
        }
        .particle:nth-child(2) {
            width: 2px;
            height: 2px;
            top: 28%;
            left: 72%;
            animation-delay: 1.2s;
            animation-duration: 6.5s;
            background: var(--neon-purple);
            box-shadow: 0 0 10px var(--neon-purple), 0 0 22px rgba(168, 85, 247, 0.35);
        }
        .particle:nth-child(3) {
            width: 4px;
            height: 4px;
            top: 62%;
            left: 22%;
            animation-delay: 2.5s;
            animation-duration: 7s;
        }
        .particle:nth-child(4) {
            width: 2px;
            height: 2px;
            top: 48%;
            left: 82%;
            animation-delay: 3.8s;
            animation-duration: 5.2s;
            background: var(--neon-purple);
            box-shadow: 0 0 9px var(--neon-purple), 0 0 18px rgba(168, 85, 247, 0.3);
        }
        .particle:nth-child(5) {
            width: 3px;
            height: 3px;
            top: 75%;
            left: 55%;
            animation-delay: 1.8s;
            animation-duration: 6.8s;
        }
        .particle:nth-child(6) {
            width: 1.5px;
            height: 1.5px;
            top: 35%;
            left: 42%;
            animation-delay: 4.2s;
            animation-duration: 5.8s;
            background: var(--neon-green);
            box-shadow: 0 0 8px var(--neon-green), 0 0 16px rgba(0, 230, 118, 0.3);
        }
        .particle:nth-child(7) {
            width: 2.5px;
            height: 2.5px;
            top: 55%;
            left: 66%;
            animation-delay: 0.8s;
            animation-duration: 7.2s;
        }
        .particle:nth-child(8) {
            width: 2px;
            height: 2px;
            top: 22%;
            left: 32%;
            animation-delay: 3.2s;
            animation-duration: 6s;
            background: var(--neon-green);
            box-shadow: 0 0 7px var(--neon-green), 0 0 14px rgba(0, 230, 118, 0.25);
        }

        @keyframes float-particle {
            0%,
            100% {
                opacity: 0;
                transform: translateY(0) scale(1);
            }
            10% {
                opacity: 0.7;
            }
            30% {
                opacity: 0.35;
                transform: translateY(-40px) scale(1.6);
            }
            60% {
                opacity: 0.15;
                transform: translateY(-80px) scale(0.7);
            }
            90% {
                opacity: 0.55;
                transform: translateY(-25px) scale(1.3);
            }
            100% {
                opacity: 0;
                transform: translateY(0) scale(1);
            }
        }

        #hero .container {
            position: relative;
            z-index: 3;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        #hero h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            max-width: 720px;
        }

        #hero h1 .gradient-text {
            background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        #hero .hero-subtitle {
            font-size: 18px;
            color: var(--text-gray);
            max-width: 560px;
            margin-bottom: 36px;
            line-height: 1.7;
            letter-spacing: 0.1px;
        }

        .btn-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
            border-radius: var(--radius-pill);
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-glow-cyan);
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
            position: relative;
            overflow: hidden;
            text-decoration: none;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-cyan-lg);
            filter: brightness(1.15);
            transform: translateY(-2px);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 4px;
            box-shadow: var(--shadow-glow-cyan-lg);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            color: var(--neon-cyan);
            background: transparent;
            border: 1px solid rgba(0, 242, 254, 0.4);
            border-radius: var(--radius-pill);
            cursor: pointer;
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
            text-decoration: none;
        }

        .btn-secondary:hover {
            background: rgba(0, 242, 254, 0.08);
            border-color: var(--neon-cyan);
            box-shadow: 0 0 14px rgba(0, 242, 254, 0.2);
            transform: translateY(-2px);
        }
        .btn-secondary:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 4px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
            padding-left: 20px;
            position: relative;
            letter-spacing: -0.3px;
        }

        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            background: var(--neon-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(0, 242, 254, 0.5);
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--text-gray);
            margin-bottom: 48px;
            padding-left: 20px;
            max-width: 600px;
            line-height: 1.7;
        }

        .glass-card {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(18px) saturate(120%);
            -webkit-backdrop-filter: blur(18px) saturate(120%);
            border: 1px solid var(--border-cyan);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
        }

        .glass-card:hover {
            border-color: var(--border-cyan-hover);
            box-shadow: var(--shadow-card), var(--shadow-glow-purple);
            transform: translateY(-4px);
        }

        #features .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: stretch;
        }

        #features .features-left {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        #features .features-right {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        #features .features-left .glass-card {
            flex: 1;
            min-height: 200px;
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        #features .features-right .glass-card {
            padding: 28px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            min-height: 100px;
        }

        #features .feature-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--neon-cyan);
            border: 1px solid rgba(0, 242, 254, 0.25);
            border-radius: 12px;
            background: rgba(0, 242, 254, 0.04);
            transition: all var(--transition-fast);
        }

        .glass-card:hover .feature-icon {
            border-color: var(--neon-cyan);
            box-shadow: 0 0 16px rgba(0, 242, 254, 0.3);
            background: rgba(0, 242, 254, 0.08);
        }

        #features .feature-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 6px;
            letter-spacing: 0.1px;
        }
        #features .feature-desc {
            font-size: 15px;
            color: var(--text-gray);
            line-height: 1.6;
        }

        #features .features-right .feature-content {
            flex: 1;
            min-width: 0;
        }

        #solutions .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .hash-cert-card {
            background: rgba(255, 255, 255, 0.025);
            backdrop-filter: blur(16px) saturate(110%);
            -webkit-backdrop-filter: blur(16px) saturate(110%);
            border: 1px solid var(--border-cyan);
            border-radius: var(--radius-lg);
            padding: 28px 24px 24px;
            position: relative;
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .hash-cert-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 18%;
            bottom: 18%;
            width: 2px;
            background: linear-gradient(180deg, var(--neon-cyan), var(--neon-purple));
            border-radius: 1px;
            opacity: 0.6;
        }

        .hash-cert-card:hover {
            border-color: var(--border-cyan-hover);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45), 0 0 18px rgba(0, 242, 254, 0.2);
            transform: translateY(-4px);
        }

        .hash-cert-card .hash-value {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--neon-cyan);
            text-shadow: 0 0 8px currentColor;
            margin-bottom: 14px;
            letter-spacing: 1px;
            opacity: 0.85;
            word-break: break-all;
        }

        .hash-cert-card .cert-img {
            width: 100%;
            height: 120px;
            object-fit: cover;
            border-radius: 8px;
            margin-bottom: 16px;
            opacity: 0.5;
            transition: opacity var(--transition-fast);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .hash-cert-card:hover .cert-img {
            opacity: 0.7;
        }

        .hash-cert-card .cert-title {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 6px;
            letter-spacing: 0.1px;
        }
        .hash-cert-card .cert-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        #process .process-steps {
            display: flex;
            align-items: flex-start;
            gap: 0;
            position: relative;
            justify-content: space-between;
            max-width: 900px;
            margin: 0 auto;
            padding: 20px 0;
        }

        #process .process-steps::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 242, 254, 0.15), rgba(168, 85, 247, 0.4), rgba(0, 242, 254, 0.15));
            z-index: 0;
            pointer-events: none;
        }

        #process .process-step {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 0;
        }

        #process .step-number {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(12, 18, 30, 0.9);
            border: 2px solid var(--neon-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            font-weight: 700;
            color: var(--neon-cyan);
            margin-bottom: 18px;
            box-shadow: 0 0 20px rgba(0, 242, 254, 0.25);
            transition: all var(--transition-smooth);
            font-family: var(--font-mono);
        }

        #process .process-step:hover .step-number {
            box-shadow: 0 0 32px rgba(0, 242, 254, 0.5);
            border-color: var(--neon-purple);
            color: var(--text-white);
            background: rgba(0, 242, 254, 0.08);
        }

        #process .step-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 4px;
            letter-spacing: 0.2px;
        }
        #process .step-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
            max-width: 180px;
        }

        #data .data-cards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        #data .data-card {
            background: rgba(255, 255, 255, 0.025);
            backdrop-filter: blur(14px) saturate(110%);
            -webkit-backdrop-filter: blur(14px) saturate(110%);
            border: 1px solid var(--border-cyan);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            text-align: center;
            position: relative;
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        #data .data-card:hover {
            border-color: var(--border-cyan-hover);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45), 0 0 18px rgba(0, 242, 254, 0.2);
            transform: translateY(-3px);
        }

        #data .data-card .data-number {
            font-size: 48px;
            font-weight: 700;
            color: var(--neon-green);
            text-shadow: 0 0 18px rgba(0, 230, 118, 0.5);
            margin-bottom: 8px;
            font-family: var(--font-mono);
            letter-spacing: -1px;
        }
        #data .data-card .data-unit {
            font-size: 18px;
            color: var(--text-gray);
            margin-bottom: 8px;
            font-weight: 500;
        }
        #data .data-card .data-note {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        #data .data-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            opacity: 0.08;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
        }

        #faq .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.025);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: rgba(0, 242, 254, 0.2);
        }
        .faq-item.open {
            border-left: 2px solid var(--neon-cyan);
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(0, 242, 254, 0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-white);
            letter-spacing: 0.1px;
            gap: 16px;
            user-select: none;
            transition: color var(--transition-fast);
        }

        .faq-item.open .faq-question {
            color: var(--neon-cyan);
        }

        .faq-arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            position: relative;
            transition: transform var(--transition-smooth);
            color: var(--text-muted);
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--neon-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 20px 18px;
        }

        #contact {
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        #contact::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }

        #contact .container {
            position: relative;
            z-index: 1;
        }

        #contact .cta-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 24px;
            letter-spacing: -0.3px;
        }

        #contact .cta-sub {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 18px;
            letter-spacing: 0.2px;
        }

        footer {
            padding: 28px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            position: relative;
            z-index: 1;
        }

        footer .footer-text {
            font-size: 14px;
            color: var(--text-muted);
            letter-spacing: 0.2px;
        }

        footer .footer-links {
            display: flex;
            gap: 20px;
            justify-content: center;
            margin-top: 8px;
            flex-wrap: wrap;
        }

        footer .footer-links a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            position: relative;
        }

        footer .footer-links a:hover {
            color: var(--neon-cyan);
        }

        footer .footer-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--neon-cyan);
            transform: scaleX(0);
            transition: transform var(--transition-fast);
            transform-origin: center;
        }

        footer .footer-links a:hover::after {
            transform: scaleX(1);
        }

        .text-link {
            color: var(--neon-cyan);
            position: relative;
            display: inline-block;
            transition: color var(--transition-fast);
        }

        .text-link::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--neon-cyan);
            transition: background var(--transition-fast);
        }

        .text-link:hover {
            color: var(--neon-purple);
        }
        .text-link:hover::after {
            background: var(--neon-purple);
        }
        .text-link:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 4px;
            border-radius: 2px;
        }

        @media (max-width: 1200px) {
            .container {
                padding: 0 20px;
            }
            #hero h1 {
                font-size: 40px;
            }
            .section-title {
                font-size: 30px;
            }
            #solutions .solutions-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            #data .data-cards {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
            }
            body::before {
                opacity: 0.3;
            }
            .desktop-nav {
                display: none !important;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            section {
                padding: 60px 0;
            }
            #hero {
                min-height: 90vh;
            }
            #hero h1 {
                font-size: 30px;
                letter-spacing: 0;
            }
            #hero .hero-subtitle {
                font-size: 15px;
                margin-bottom: 28px;
            }
            .btn-group {
                flex-direction: column;
                gap: 12px;
                width: 100%;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                padding: 14px 20px;
                font-size: 15px;
            }
            .section-title {
                font-size: 26px;
                padding-left: 16px;
            }
            .section-title::before {
                width: 3px;
                top: 4px;
                bottom: 4px;
            }
            .section-subtitle {
                font-size: 15px;
                padding-left: 16px;
                margin-bottom: 32px;
            }
            #features .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            #features .features-left .glass-card {
                min-height: 140px;
                padding: 24px 20px;
            }
            #features .features-right .glass-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 20px 18px;
            }
            #solutions .solutions-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .hash-cert-card {
                padding: 22px 18px 20px;
            }
            .hash-cert-card .cert-img {
                height: 90px;
            }
            #process .process-steps {
                flex-direction: column;
                align-items: center;
                gap: 28px;
            }
            #process .process-steps::before {
                display: none;
            }
            #process .process-step {
                flex-direction: row;
                gap: 16px;
                text-align: left;
                width: 100%;
                max-width: 300px;
            }
            #process .step-number {
                width: 44px;
                height: 44px;
                font-size: 20px;
                margin-bottom: 0;
                flex-shrink: 0;
            }
            #process .step-desc {
                max-width: none;
            }
            #data .data-cards {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            #data .data-card .data-number {
                font-size: 36px;
            }
            #contact .cta-title {
                font-size: 24px;
            }
            .faq-question {
                font-size: 14px;
                padding: 16px 16px;
            }
            .faq-answer {
                font-size: 13px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
            footer {
                padding: 20px 0;
            }
            footer .footer-text {
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            #hero h1 {
                font-size: 26px;
            }
            #hero .hero-subtitle {
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
            #data .data-card .data-number {
                font-size: 30px;
            }
            #data .data-card {
                padding: 24px 18px;
            }
            .hash-cert-card .hash-value {
                font-size: 11px;
            }
            .logo {
                font-size: 17px;
            }
            .logo span {
                font-size: 13px;
            }
        }