/* roulang page: index */
:root {
            --color-primary: #00E5FF;
            --color-primary-rgb: 0, 229, 255;
            --color-secondary: #A855F7;
            --color-secondary-rgb: 168, 85, 247;
            --color-accent-green: #39FF14;
            --color-accent-green-rgb: 57, 255, 20;
            --color-accent-pink: #FF007F;
            --color-accent-pink-rgb: 255, 0, 127;
            --color-bg-deep: #0A0A0A;
            --color-bg-dark: #0D0D1A;
            --color-bg-card: rgba(18, 18, 35, 0.85);
            --color-bg-card-hover: rgba(25, 25, 48, 0.9);
            --color-text-white: #FFFFFF;
            --color-text-light: #CCCCDD;
            --color-text-muted: #8888A0;
            --color-border-glow: rgba(0, 229, 255, 0.3);
            --color-border-glow-bright: rgba(0, 229, 255, 0.7);
            --color-border-secondary: rgba(168, 85, 247, 0.3);
            --radius-sm: 4px;
            --radius-md: 6px;
            --radius-lg: 12px;
            --shadow-glow-sm: 0 0 15px rgba(0, 229, 255, 0.25);
            --shadow-glow-md: 0 0 30px rgba(0, 229, 255, 0.35);
            --shadow-glow-lg: 0 0 50px rgba(0, 229, 255, 0.45);
            --shadow-purple-sm: 0 0 15px rgba(168, 85, 247, 0.25);
            --shadow-purple-md: 0 0 30px rgba(168, 85, 247, 0.35);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Segoe UI', sans-serif;
            --font-mono: 'Orbitron', 'Courier New', 'SF Mono', 'Consolas', monospace;
            --nav-height: 66px;
            --section-gap: 100px;
            --container-max: 1200px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg-deep);
            color: var(--color-text-light);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse at 20% 15%, rgba(0, 229, 255, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 75% 55%, rgba(168, 85, 247, 0.05) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 85%, rgba(255, 0, 127, 0.03) 0%, transparent 50%);
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
            background-image:
                linear-gradient(rgba(0, 229, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 229, 255, 0.02) 1px, transparent 1px);
            background-size: 60px 60px;
            opacity: 0.5;
        }

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

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

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

        button {
            cursor: pointer;
        }

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

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-text-white);
            text-align: center;
            margin-bottom: 0.5rem;
            letter-spacing: 0.5px;
            position: relative;
            display: inline-block;
        }

        .section-title-wrapper {
            text-align: center;
            margin-bottom: 56px;
            position: relative;
        }

        .section-title-wrapper .section-title::after {
            content: '';
            position: absolute;
            bottom: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
            border-radius: 2px;
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.6), 0 0 36px rgba(168, 85, 247, 0.3);
        }

        .section-subtitle {
            display: block;
            text-align: center;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            margin-top: 20px;
            letter-spacing: 0.3px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.4px;
            transition: all var(--transition-bounce);
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
            color: #fff;
            font-weight: 700;
            box-shadow: 0 4px 22px rgba(0, 229, 255, 0.35), 0 0 0 0 rgba(168, 85, 247, 0.4);
            animation: btnPulse 2.8s ease-in-out infinite;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 35px rgba(0, 229, 255, 0.55), 0 0 0 8px rgba(168, 85, 247, 0.08);
            animation: none;
        }

        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 4px 18px rgba(0, 229, 255, 0.4);
        }

        @keyframes btnPulse {
            0%,
            100% {
                box-shadow: 0 4px 22px rgba(0, 229, 255, 0.35), 0 0 0 0 rgba(168, 85, 247, 0.4);
            }
            50% {
                box-shadow: 0 4px 22px rgba(0, 229, 255, 0.55), 0 0 0 14px rgba(168, 85, 247, 0);
            }
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--color-border-glow-bright);
            color: var(--color-primary);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.1);
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: var(--color-primary);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-lg {
            padding: 17px 40px;
            font-size: 1.1rem;
            border-radius: var(--radius-md);
        }

        .card-glow {
            background: var(--color-bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--color-border-glow);
            border-radius: var(--radius-md);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.08);
            transition: all var(--transition-smooth);
        }
        .card-glow:hover {
            border-color: var(--color-border-glow-bright);
            box-shadow: 0 0 35px rgba(0, 229, 255, 0.2), 0 0 60px rgba(0, 229, 255, 0.06);
            background: var(--color-bg-card-hover);
            transform: translateY(-3px);
        }

        /* ────────── NAVIGATION ────────── */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            z-index: 1000;
            background: rgba(10, 10, 18, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 229, 255, 0.18);
            transition: all var(--transition-smooth);
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
        }
        .nav-header.scrolled {
            background: rgba(8, 8, 16, 0.92);
            border-bottom-color: rgba(0, 229, 255, 0.35);
            box-shadow: 0 2px 40px rgba(0, 229, 255, 0.12);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            font-family: var(--font-sans);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text-white);
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
            z-index: 1001;
            white-space: nowrap;
        }
        .nav-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
        }
        .nav-logo .logo-text {
            background: linear-gradient(135deg, #fff 0%, #cceeff 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-menu a {
            font-size: 0.93rem;
            font-weight: 500;
            color: #bbb;
            letter-spacing: 0.5px;
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition-fast);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-primary);
            border-radius: 1px;
            box-shadow: 0 0 10px var(--color-primary);
            transition: width var(--transition-smooth);
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: #fff;
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
        }
        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 9px 20px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(168, 85, 247, 0.2));
            border: 1px solid var(--color-border-glow-bright);
            color: #fff;
            font-weight: 600;
            font-size: 0.88rem;
            letter-spacing: 0.4px;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.35), rgba(168, 85, 247, 0.35));
            box-shadow: 0 0 25px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }
        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            z-index: 1001;
            padding: 6px;
            background: none;
            border: none;
            width: 36px;
            height: 28px;
            justify-content: center;
        }
        .nav-hamburger span {
            display: block;
            width: 100%;
            height: 2.5px;
            background: #fff;
            border-radius: 2px;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 6px rgba(0, 229, 255, 0.4);
        }
        .nav-hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(10, 10, 20, 0.96);
                backdrop-filter: blur(30px);
                -webkit-backdrop-filter: blur(30px);
                flex-direction: column;
                justify-content: center;
                gap: 36px;
                transition: right var(--transition-smooth);
                border-left: 1px solid rgba(0, 229, 255, 0.2);
                box-shadow: -10px 0 50px rgba(0, 0, 0, 0.6);
                z-index: 1000;
                padding: 60px 30px;
            }
            .nav-menu.open {
                right: 0;
            }
            .nav-menu a {
                font-size: 1.15rem;
                text-align: center;
            }
            .nav-cta {
                display: none;
            }
            .nav-cta-mobile {
                display: inline-flex !important;
                margin-top: 10px;
                align-self: center;
            }
            .nav-hamburger {
                display: flex;
            }
        }
        @media (min-width: 769px) {
            .nav-cta-mobile {
                display: none !important;
            }
        }
        .nav-cta-mobile {
            display: none;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 25px rgba(0, 229, 255, 0.4);
            transition: all var(--transition-smooth);
        }

        /* ────────── HERO ────────── */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            padding: calc(var(--nav-height) + 40px) 24px 60px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(10, 10, 10, 0.65) 0%,
                    rgba(10, 10, 16, 0.78) 40%,
                    rgba(10, 10, 10, 0.9) 100%);
            z-index: 0;
        }
        .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            overflow: hidden;
        }
        .hero-particle {
            position: absolute;
            border-radius: 50%;
            animation: floatUp 6s infinite ease-in;
            opacity: 0;
        }
        @keyframes floatUp {
            0% {
                transform: translateY(0) translateX(0) scale(0);
                opacity: 0;
            }
            15% {
                opacity: 0.9;
            }
            40% {
                opacity: 0.5;
            }
            100% {
                transform: translateY(-110vh) translateX(60px) scale(2);
                opacity: 0;
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 780px;
        }
        .hero-badge {
            display: inline-block;
            padding: 7px 18px;
            border-radius: 20px;
            border: 1px solid rgba(0, 229, 255, 0.5);
            background: rgba(0, 229, 255, 0.08);
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 28px;
            animation: badgeGlow 2.5s ease-in-out infinite;
            text-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
        }
        @keyframes badgeGlow {
            0%,
            100% {
                box-shadow: 0 0 12px rgba(0, 229, 255, 0.3);
            }
            50% {
                box-shadow: 0 0 28px rgba(0, 229, 255, 0.6);
            }
        }
        .hero-title {
            font-size: clamp(2.6rem, 5.5vw, 4.4rem);
            font-weight: 900;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
            text-shadow:
                0 0 30px rgba(0, 229, 255, 0.5),
                0 0 80px rgba(0, 229, 255, 0.25),
                0 0 120px rgba(168, 85, 247, 0.3);
            background: linear-gradient(180deg, #ffffff 0%, #d0e8ff 40%, #a0d8ff 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
        }
        .hero-subtitle {
            font-size: 1.15rem;
            color: #bbb;
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.8;
            letter-spacing: 0.3px;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
                text-shadow: 0 0 20px rgba(0, 229, 255, 0.5), 0 0 50px rgba(0, 229, 255, 0.2);
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-cta-group {
                flex-direction: column;
                align-items: center;
            }
            .hero-cta-group .btn {
                width: 100%;
                max-width: 320px;
            }
        }

        /* ────────── DASHBOARD ────────── */
        .dashboard-section {
            padding: var(--section-gap) 24px;
            position: relative;
            z-index: 1;
        }
        .dashboard-grid {
            display: flex;
            gap: 28px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .dashboard-card {
            flex: 1 1 280px;
            max-width: 340px;
            min-width: 260px;
            padding: 36px 28px 28px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .dashboard-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            animation: cardOrbit 8s linear infinite;
            pointer-events: none;
        }
        @keyframes cardOrbit {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }
        .dashboard-number {
            font-family: var(--font-mono);
            font-size: 3.6rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
            margin-bottom: 8px;
            text-shadow: 0 0 30px rgba(0, 229, 255, 0.7), 0 0 60px rgba(0, 229, 255, 0.3);
            position: relative;
            z-index: 1;
            letter-spacing: -1px;
        }
        .dashboard-unit {
            font-family: var(--font-mono);
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--color-primary);
            opacity: 0.85;
            margin-left: 2px;
            text-shadow: 0 0 15px rgba(0, 229, 255, 0.4);
        }
        .dashboard-label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            letter-spacing: 0.6px;
            position: relative;
            z-index: 1;
            margin-top: 4px;
        }
        .dashboard-desc {
            font-size: 0.8rem;
            color: #666;
            margin-top: 6px;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .dashboard-grid {
                flex-direction: column;
                align-items: center;
            }
            .dashboard-card {
                max-width: 100%;
                width: 100%;
            }
            .dashboard-number {
                font-size: 2.8rem;
            }
        }

        /* ────────── SERVICES ────────── */
        .services-section {
            padding: var(--section-gap) 24px;
            position: relative;
            z-index: 1;
            background: rgba(0, 0, 0, 0.2);
        }
        .services-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 24px;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .service-card {
            padding: 32px 28px;
            position: relative;
            overflow: hidden;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            min-height: 180px;
        }
        .service-card.card-large {
            grid-column: span 1;
        }
        .service-card.card-small {
            grid-column: span 1;
        }
        .service-card:nth-child(1) {
            grid-column: 1 / 2;
            grid-row: 1 / 2;
        }
        .service-card:nth-child(2) {
            grid-column: 2 / 3;
            grid-row: 1 / 2;
        }
        .service-card:nth-child(3) {
            grid-column: 1 / 2;
            grid-row: 2 / 3;
        }
        .service-card:nth-child(4) {
            grid-column: 2 / 3;
            grid-row: 2 / 3;
        }
        .service-card:nth-child(1) {
            grid-column: 1 / 3;
            grid-row: 1 / 2;
            flex-direction: row;
            align-items: center;
            gap: 32px;
        }
        .service-card:nth-child(2) {
            grid-column: 1 / 2;
            grid-row: 2 / 3;
        }
        .service-card:nth-child(3) {
            grid-column: 2 / 3;
            grid-row: 2 / 3;
        }
        .service-card:nth-child(4) {
            grid-column: 1 / 3;
            grid-row: 3 / 4;
            flex-direction: row;
            align-items: center;
            gap: 32px;
        }
        .service-icon-wrap {
            flex-shrink: 0;
            width: 70px;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--color-border-glow);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.2);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 0, 0, 0.4);
        }
        .service-icon-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.85;
        }
        .service-icon-wrap .service-icon-fallback {
            font-size: 2rem;
            color: var(--color-primary);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
        }
        .service-info h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
            letter-spacing: 0.4px;
        }
        .service-info p {
            font-size: 0.9rem;
            color: #999;
            line-height: 1.6;
            max-width: 420px;
        }
        @media (max-width: 768px) {
            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .service-card:nth-child(1),
            .service-card:nth-child(2),
            .service-card:nth-child(3),
            .service-card:nth-child(4) {
                grid-column: 1 / 2;
                grid-row: auto;
                flex-direction: column;
                gap: 16px;
                align-items: flex-start;
            }
            .service-card {
                min-height: auto;
                padding: 24px 20px;
            }
        }

        /* ────────── COMPARISON ────────── */
        .comparison-section {
            padding: var(--section-gap) 24px;
            position: relative;
            z-index: 1;
        }
        .comparison-table {
            max-width: 860px;
            margin: 0 auto;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .comparison-row {
            display: flex;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .comparison-row:last-child {
            border-bottom: none;
        }
        .comparison-row.header-row {
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .comparison-cell {
            flex: 1;
            padding: 18px 24px;
            text-align: center;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .comparison-cell.cell-label {
            flex: 0 0 140px;
            font-weight: 600;
            color: #ddd;
            text-align: left;
            letter-spacing: 0.3px;
        }
        .comparison-cell.cell-old {
            background: rgba(120, 120, 140, 0.08);
            color: #777;
            text-decoration: line-through;
            text-decoration-color: rgba(255, 80, 80, 0.5);
            text-decoration-thickness: 1.5px;
        }
        .comparison-cell.cell-new {
            background: rgba(0, 229, 255, 0.06);
            color: #fff;
            font-weight: 600;
            border-left: 1px solid rgba(0, 229, 255, 0.2);
        }
        .comparison-cell .icon-check {
            color: var(--color-accent-green);
            text-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
            font-size: 1.1rem;
        }
        .comparison-cell .icon-cross {
            color: #ff5555;
            opacity: 0.7;
        }
        .comparison-header {
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.5px;
        }
        .comparison-header.old-header {
            color: #888;
        }
        .comparison-header.new-header {
            color: var(--color-primary);
            text-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
        }
        @media (max-width: 768px) {
            .comparison-cell.cell-label {
                flex: 0 0 90px;
                font-size: 0.82rem;
                padding: 14px 10px;
            }
            .comparison-cell {
                font-size: 0.82rem;
                padding: 14px 10px;
            }
            .comparison-table {
                font-size: 0.85rem;
            }
        }

        /* ────────── FAQ ────────── */
        .faq-section {
            padding: var(--section-gap) 24px;
            position: relative;
            z-index: 1;
            background: rgba(0, 0, 0, 0.15);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .faq-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 3px;
            height: 100%;
            background: transparent;
            border-radius: 0 3px 3px 0;
            transition: all var(--transition-smooth);
        }
        .faq-item.open {
            border-color: var(--color-border-glow);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.1);
        }
        .faq-item.open::before {
            background: var(--color-primary);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.7), 0 0 30px rgba(0, 229, 255, 0.3);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 20px 28px;
            font-size: 1rem;
            font-weight: 600;
            color: #ddd;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: none;
            border: none;
            letter-spacing: 0.3px;
            transition: color var(--transition-fast);
        }
        .faq-item.open .faq-question {
            color: #fff;
        }
        .faq-arrow {
            flex-shrink: 0;
            font-size: 0.8rem;
            color: #888;
            transition: transform var(--transition-smooth);
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), padding 0.45s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 28px;
            color: #aaa;
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 28px 20px;
        }
        @media (max-width: 768px) {
            .faq-question {
                font-size: 0.9rem;
                padding: 16px 20px;
            }
            .faq-answer {
                padding: 0 20px;
                font-size: 0.82rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 20px 16px;
            }
        }

        /* ────────── CONTACT ────────── */
        .contact-section {
            padding: var(--section-gap) 24px;
            position: relative;
            z-index: 1;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .contact-overlay {
            position: absolute;
            inset: 0;
            background: rgba(8, 8, 16, 0.85);
            z-index: 0;
        }
        .contact-inner {
            position: relative;
            z-index: 1;
            max-width: 520px;
            margin: 0 auto;
        }
        .contact-form-card {
            background: rgba(15, 15, 30, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--color-border-glow);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            box-shadow: 0 0 40px rgba(0, 229, 255, 0.08);
            position: relative;
            overflow: hidden;
        }
        .contact-form-card::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
            animation: contactOrb 6s ease-in-out infinite;
        }
        @keyframes contactOrb {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            50% {
                transform: translate(-30px, 20px) scale(1.2);
            }
        }
        .contact-form-card .form-group {
            margin-bottom: 18px;
        }
        .contact-form-card label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: #ccc;
            margin-bottom: 6px;
            letter-spacing: 0.4px;
        }
        .contact-form-card input,
        .contact-form-card textarea {
            width: 100%;
            padding: 13px 16px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 0.95rem;
            transition: all var(--transition-smooth);
            resize: vertical;
            letter-spacing: 0.3px;
        }
        .contact-form-card input:focus,
        .contact-form-card textarea:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.25), 0 0 0 3px rgba(0, 229, 255, 0.06);
            background: rgba(255, 255, 255, 0.06);
        }
        .contact-form-card input::placeholder,
        .contact-form-card textarea::placeholder {
            color: #555;
        }
        .contact-form-card textarea {
            min-height: 100px;
        }
        .contact-submit-btn {
            width: 100%;
            padding: 15px 30px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            letter-spacing: 0.5px;
            cursor: pointer;
            border: none;
            box-shadow: 0 4px 25px rgba(0, 229, 255, 0.4);
            transition: all var(--transition-bounce);
            position: relative;
            overflow: hidden;
        }
        .contact-submit-btn:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 8px 40px rgba(0, 229, 255, 0.55), 0 0 0 10px rgba(168, 85, 247, 0.06);
        }
        .contact-submit-btn:active {
            transform: translateY(-1px) scale(0.99);
        }
        .contact-urgency {
            text-align: center;
            color: var(--color-accent-pink);
            font-size: 0.85rem;
            font-weight: 500;
            margin-top: 14px;
            letter-spacing: 0.4px;
            text-shadow: 0 0 10px rgba(255, 0, 127, 0.3);
        }
        @media (max-width: 768px) {
            .contact-form-card {
                padding: 28px 18px;
            }
        }

        /* ────────── FOOTER ────────── */
        .site-footer {
            padding: 40px 24px;
            text-align: center;
            background: rgba(5, 5, 12, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
            z-index: 1;
        }
        .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 10px;
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
        }
        .footer-copy {
            font-size: 0.82rem;
            color: #666;
            letter-spacing: 0.3px;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .footer-links a {
            font-size: 0.82rem;
            color: #777;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-primary);
        }

        /* ────────── GLOBAL ANIMATIONS ────────── */
        @keyframes glowPulse {
            0%,
            100% {
                box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
            }
            50% {
                box-shadow: 0 0 40px rgba(0, 229, 255, 0.35);
            }
        }
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (max-width: 520px) {
            :root {
                --section-gap: 60px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .container {
                padding: 0 14px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }