/* roulang page: index */
:root {
            --bg-primary: #080c18;
            --bg-secondary: #0d1328;
            --bg-card: rgba(13, 19, 40, 0.7);
            --color-primary: #1a6dff;
            --color-primary-hover: #3d85ff;
            --color-accent-purple: #b347ea;
            --color-accent-cyan: #00e5a0;
            --text-heading: #ffffff;
            --text-body: #c8d0e0;
            --text-muted: #8890a8;
            --border-subtle: rgba(26, 109, 255, 0.2);
            --border-glow: rgba(26, 109, 255, 0.5);
            --border-purple-glow: rgba(179, 71, 234, 0.5);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 1px rgba(26, 109, 255, 0.15);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.55), 0 0 1px rgba(26, 109, 255, 0.35);
            --shadow-btn-glow: 0 0 20px rgba(26, 109, 255, 0.5);
            --shadow-btn-glow-hover: 0 0 32px rgba(26, 109, 255, 0.7);
            --font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: "SF Mono", "Consolas", "DIN Alternate", "Courier New", monospace;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s ease;
            --nav-height-pc: 72px;
            --nav-height-mobile: 56px;
            --section-gap-pc: 80px;
            --section-gap-mobile: 48px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height-pc);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-heading);
            font-size: 16px;
            line-height: 1.7;
            font-weight: 400;
            color: var(--text-body);
            background-color: var(--bg-primary);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        input,
        textarea {
            width: 100%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            color: var(--text-heading);
            font-size: 15px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            resize: vertical;
        }

        input:focus,
        textarea:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(26, 109, 255, 0.15), 0 0 12px rgba(26, 109, 255, 0.2);
            outline: none;
        }

        input::placeholder,
        textarea::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            html {
                scroll-padding-top: var(--nav-height-mobile);
            }
        }

        /* ========== NAVIGATION ========== */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height-pc);
            background: rgba(8, 12, 24, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(26, 109, 255, 0.3);
            display: flex;
            align-items: center;
            transition: background var(--transition-smooth);
        }

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

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent-purple));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 1px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-body);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-heading);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border: 1px solid var(--color-accent-purple);
            border-radius: var(--radius-sm);
            color: var(--text-heading);
            font-size: 14px;
            font-weight: 600;
            background: rgba(179, 71, 234, 0.08);
            box-shadow: 0 0 14px rgba(179, 71, 234, 0.25);
            transition: all var(--transition-smooth);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-cta-btn:hover {
            background: rgba(179, 71, 234, 0.18);
            box-shadow: 0 0 24px rgba(179, 71, 234, 0.45);
            color: #fff;
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1100;
            padding: 8px;
            background: none;
            border: none;
        }
        .nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-heading);
            border-radius: 3px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }
        .nav-hamburger.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
            background: var(--color-primary);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
            background: var(--color-primary);
        }

        @media (max-width: 768px) {
            .nav {
                height: var(--nav-height-mobile);
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-links {
                display: none;
            }
            .nav-cta-btn.desktop-only {
                display: none;
            }
        }

        .nav-mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 1050;
            background: rgba(8, 12, 24, 0.96);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .nav-mobile-menu.open {
            display: flex;
            opacity: 1;
            pointer-events: auto;
        }
        .nav-mobile-menu a {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: 2px;
            transition: color var(--transition-fast);
        }
        .nav-mobile-menu a:hover {
            color: var(--color-primary);
        }
        .nav-mobile-menu .mobile-cta {
            margin-top: 8px;
            padding: 14px 32px;
            border: 2px solid var(--color-accent-purple);
            border-radius: var(--radius-sm);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            background: rgba(179, 71, 234, 0.1);
            box-shadow: 0 0 20px rgba(179, 71, 234, 0.3);
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--nav-height-pc);
            overflow: hidden;
            background:
                radial-gradient(ellipse at 75% 40%, rgba(179, 71, 234, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 25% 65%, rgba(26, 109, 255, 0.06) 0%, transparent 50%),
                linear-gradient(180deg, rgba(8, 12, 24, 0.92) 0%, rgba(8, 12, 24, 0.7) 100%),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            background-blend-mode: normal, normal, normal, overlay;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(26, 109, 255, 0.03) 2px, rgba(26, 109, 255, 0.03) 4px),
                repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(26, 109, 255, 0.02) 2px, rgba(26, 109, 255, 0.02) 4px);
            pointer-events: none;
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -120px;
            right: -180px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(179, 71, 234, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            width: 100%;
        }

        .hero-text {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(26, 109, 255, 0.12);
            border: 1px solid rgba(26, 109, 255, 0.3);
            border-radius: 20px;
            padding: 8px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            width: fit-content;
            letter-spacing: 0.5px;
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent-cyan);
            animation: dotPulse 2s infinite;
        }
        @keyframes dotPulse {
            0%,
            100% {
                box-shadow: 0 0 6px var(--color-accent-cyan);
            }
            50% {
                box-shadow: 0 0 18px var(--color-accent-cyan), 0 0 30px rgba(0, 229, 160, 0.5);
            }
        }

        .hero h1 {
            font-size: clamp(32px, 4.5vw, 56px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 1px;
            background: linear-gradient(135deg, var(--color-primary) 0%, #5b8dff 35%, var(--color-accent-purple) 70%, #d07af0 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin: 0;
        }

        .hero-subtitle {
            font-size: 18px;
            color: #a0a8c0;
            line-height: 1.8;
            max-width: 480px;
        }
        .hero-subtitle .highlight-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }
        .hero-subtitle .highlight-tags span {
            display: inline-block;
            background: rgba(0, 229, 160, 0.08);
            border: 1px solid rgba(0, 229, 160, 0.25);
            color: var(--color-accent-cyan);
            padding: 4px 12px;
            border-radius: 14px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            padding: 14px 30px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-btn-glow);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            letter-spacing: 1px;
            animation: btnBreathPulse 2.5s ease-in-out infinite;
        }
        @keyframes btnBreathPulse {
            0%,
            100% {
                box-shadow: 0 0 20px rgba(26, 109, 255, 0.5);
            }
            50% {
                box-shadow: 0 0 36px rgba(26, 109, 255, 0.75), 0 0 50px rgba(179, 71, 234, 0.3);
            }
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            box-shadow: var(--shadow-btn-glow-hover);
            transform: translateY(-2px);
            animation: none;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(26, 109, 255, 0.4);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-heading);
            font-weight: 600;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-primary);
            transition: all var(--transition-smooth);
            letter-spacing: 1px;
        }
        .btn-secondary:hover {
            background: rgba(26, 109, 255, 0.1);
            border-color: var(--color-primary-hover);
            box-shadow: 0 0 16px rgba(26, 109, 255, 0.25);
            transform: translateY(-2px);
        }

        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 400px;
        }
        .hero-visual-inner {
            width: 320px;
            height: 320px;
            border-radius: 50%;
            position: relative;
            background: radial-gradient(circle at center, rgba(26, 109, 255, 0.08) 0%, transparent 60%);
            border: 2px solid rgba(26, 109, 255, 0.25);
            animation: heroRingRotate 20s linear infinite;
        }
        @keyframes heroRingRotate {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }
        .hero-visual-inner::before {
            content: '';
            position: absolute;
            inset: 20px;
            border-radius: 50%;
            border: 1px dashed rgba(179, 71, 234, 0.35);
            animation: heroRingRotate 28s linear infinite reverse;
        }
        .hero-visual-inner::after {
            content: '';
            position: absolute;
            inset: 50px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 229, 160, 0.15) 0%, transparent 60%);
            border: 1px solid rgba(0, 229, 160, 0.35);
            animation: heroRingRotate 16s linear infinite;
        }
        .hero-visual-dot {
            position: absolute;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-accent-cyan);
            box-shadow: 0 0 16px var(--color-accent-cyan), 0 0 32px rgba(0, 229, 160, 0.6);
            animation: heroDotFloat 6s ease-in-out infinite;
        }
        .hero-visual-dot:nth-child(1) {
            top: 15%;
            left: 25%;
            animation-delay: 0s;
        }
        .hero-visual-dot:nth-child(2) {
            top: 60%;
            right: 18%;
            animation-delay: -2s;
            background: var(--color-accent-purple);
            box-shadow: 0 0 16px var(--color-accent-purple), 0 0 32px rgba(179, 71, 234, 0.6);
        }
        .hero-visual-dot:nth-child(3) {
            bottom: 20%;
            left: 30%;
            animation-delay: -4s;
            background: var(--color-primary);
            box-shadow: 0 0 16px var(--color-primary), 0 0 32px rgba(26, 109, 255, 0.6);
        }
        @keyframes heroDotFloat {
            0%,
            100% {
                transform: translateY(0) scale(1);
                opacity: 0.8;
            }
            50% {
                transform: translateY(-20px) scale(1.4);
                opacity: 1;
            }
        }

        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
            .hero-text {
                align-items: center;
            }
            .hero-badge {
                margin: 0 auto;
            }
            .hero-subtitle {
                max-width: 100%;
            }
            .hero-subtitle .highlight-tags {
                justify-content: center;
            }
            .hero-cta-group {
                justify-content: center;
            }
            .hero-visual {
                min-height: 280px;
            }
            .hero-visual-inner {
                width: 240px;
                height: 240px;
            }
        }
        @media (max-width: 480px) {
            .hero {
                min-height: auto;
                padding: calc(var(--nav-height-mobile) + 40px) 0 60px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-visual {
                min-height: 200px;
            }
            .hero-visual-inner {
                width: 180px;
                height: 180px;
            }
            .hero-cta-group {
                flex-direction: column;
                align-items: center;
                width: 100%;
            }
            .hero-cta-group .btn-primary,
            .hero-cta-group .btn-secondary {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: var(--section-gap-pc) 0;
            position: relative;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--section-gap-mobile) 0;
            }
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--color-accent-cyan);
            margin-bottom: 12px;
        }
        .section h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: 1px;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== METRICS ========== */
        #metrics {
            background: var(--bg-primary);
            position: relative;
        }
        #metrics::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(13, 19, 40, 0.6) 3px, rgba(13, 19, 40, 0.6) 6px),
                repeating-linear-gradient(90deg, transparent, transparent 3px, rgba(13, 19, 40, 0.4) 3px, rgba(13, 19, 40, 0.4) 6px);
            pointer-events: none;
            z-index: 0;
            opacity: 0.5;
        }
        #metrics .container {
            position: relative;
            z-index: 1;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-glow);
        }
        .metric-card .metric-icon {
            font-size: 28px;
            margin-bottom: 12px;
            display: block;
        }
        .metric-number {
            font-family: var(--font-mono);
            font-size: clamp(36px, 5vw, 52px);
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 1px;
            line-height: 1;
            margin-bottom: 6px;
        }
        .metric-number.cyan {
            color: var(--color-accent-cyan);
        }
        .metric-unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-body);
            margin-bottom: 4px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            letter-spacing: 1px;
        }
        @media (max-width: 1023px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .metric-card {
                padding: 24px 16px;
            }
        }

        /* ========== SERVICES ========== */
        #services {
            background: var(--bg-secondary);
            position: relative;
        }
        .services-grid {
            display: grid;
            grid-template-columns: 35% 58%;
            gap: 20px;
            margin-bottom: 20px;
        }
        .services-col-left {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .services-col-right {
            display: flex;
        }
        .services-row-bottom {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .service-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-glow);
        }
        .service-card .service-img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 4px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .service-card.tall .service-img {
            height: 200px;
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: 0.5px;
            margin: 0;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            flex-grow: 1;
            margin: 0;
        }
        .service-card .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast);
            cursor: pointer;
            width: fit-content;
        }
        .service-card .service-link:hover {
            color: var(--color-primary-hover);
            text-decoration: underline;
            text-underline-offset: 4px;
        }
        .service-card .service-icon-css {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            flex-shrink: 0;
        }
        .service-icon-blue {
            background: rgba(26, 109, 255, 0.15);
            color: var(--color-primary);
        }
        .service-icon-purple {
            background: rgba(179, 71, 234, 0.15);
            color: var(--color-accent-purple);
        }
        .service-icon-cyan {
            background: rgba(0, 229, 160, 0.12);
            color: var(--color-accent-cyan);
        }

        @media (max-width: 1023px) {
            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .services-row-bottom {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .service-card.tall .service-img {
                height: 160px;
            }
        }
        @media (max-width: 520px) {
            .service-card {
                padding: 20px 16px;
            }
            .service-card .service-img {
                height: 120px;
            }
            .service-card.tall .service-img {
                height: 140px;
            }
        }

        /* ========== COMPARISON ========== */
        #comparison {
            background: var(--bg-primary);
            position: relative;
        }
        #comparison::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 1px;
            height: 60px;
            background: linear-gradient(to bottom, transparent, rgba(26, 109, 255, 0.4), transparent);
            pointer-events: none;
        }
        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            max-width: 900px;
            margin: 0 auto;
        }
        .comparison-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
        }
        .comparison-card.old {
            border-color: rgba(255, 255, 255, 0.06);
            opacity: 0.7;
        }
        .comparison-card.new {
            border-color: rgba(26, 109, 255, 0.45);
            box-shadow: var(--shadow-card), 0 0 24px rgba(26, 109, 255, 0.18);
            position: relative;
            overflow: hidden;
        }
        .comparison-card.new::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(26, 109, 255, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .comparison-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .comparison-card.old h3 {
            color: var(--text-muted);
        }
        .comparison-card.new h3 {
            color: var(--color-primary);
        }
        .comparison-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            gap: 12px;
        }
        .comparison-row:last-child {
            border-bottom: none;
        }
        .comparison-label {
            font-size: 14px;
            color: var(--text-body);
            font-weight: 500;
            flex-shrink: 0;
        }
        .comparison-value {
            font-size: 14px;
            font-weight: 700;
            text-align: right;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .comparison-card.old .comparison-value {
            color: #e0556a;
        }
        .comparison-card.new .comparison-value {
            color: var(--color-accent-cyan);
        }
        .comparison-icon-fail {
            color: #e0556a;
            font-weight: 700;
            font-size: 16px;
        }
        .comparison-icon-pass {
            color: var(--color-accent-cyan);
            font-weight: 700;
            font-size: 18px;
        }
        @media (max-width: 768px) {
            .comparison-wrapper {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .comparison-card {
                padding: 24px 18px;
            }
        }

        /* ========== FAQ ========== */
        #faq {
            background: var(--bg-secondary);
            position: relative;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .faq-item.active {
            border-color: var(--border-glow);
            box-shadow: 0 0 20px rgba(26, 109, 255, 0.1);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            cursor: pointer;
            text-align: left;
            background: none;
            border: none;
            transition: color var(--transition-fast);
            letter-spacing: 0.5px;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-indicator {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent-cyan);
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(0, 229, 160, 0.5);
            transition: all var(--transition-smooth);
        }
        .faq-item.active .faq-indicator {
            box-shadow: 0 0 16px rgba(0, 229, 160, 0.7);
            transform: scale(1.3);
        }
        .faq-arrow {
            margin-left: auto;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }
        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 16px;
                font-size: 15px;
                gap: 10px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ========== CONTACT ========== */
        #contact {
            background: var(--bg-primary);
            position: relative;
        }
        #contact::before {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(179, 71, 234, 0.06) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .contact-card {
            max-width: 620px;
            margin: 0 auto;
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(179, 71, 234, 0.3);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            box-shadow: var(--shadow-card), 0 0 30px rgba(179, 71, 234, 0.08);
            position: relative;
            z-index: 1;
        }
        .contact-card h2 {
            text-align: center;
            margin-bottom: 8px;
        }
        .contact-card .contact-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 32px;
        }
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .contact-form .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .contact-form textarea {
            min-height: 100px;
        }
        .contact-form .btn-primary {
            width: 100%;
            justify-content: center;
            font-size: 17px;
            padding: 16px;
            margin-top: 8px;
            animation: btnBreathPulse 2.5s ease-in-out infinite;
        }
        .contact-form .btn-primary:hover {
            animation: none;
        }
        .form-feedback {
            text-align: center;
            font-size: 14px;
            min-height: 20px;
            transition: color var(--transition-fast);
        }
        .form-feedback.success {
            color: var(--color-accent-cyan);
        }
        .form-feedback.error {
            color: #e0556a;
        }
        @media (max-width: 520px) {
            .contact-card {
                padding: 32px 16px;
                border-radius: var(--radius-md);
            }
            .contact-form .form-row {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FOOTER ========== */
        .footer {
            background: #060a14;
            padding: 48px 0 24px;
            border-top: 1px solid rgba(26, 109, 255, 0.15);
            position: relative;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .footer-col p,
        .footer-col a {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 2;
            display: block;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--color-primary);
        }
        .footer-logo-text {
            font-size: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent-purple));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-col:first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                text-align: center;
            }
        }

        /* ========== UTILITY ANIMATIONS ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }