/* roulang page: index */
:root {
            --color-primary: #FF4D00;
            --color-primary-dark: #cc3d00;
            --color-accent: #00F0FF;
            --color-bg: #121212;
            --color-card: #1E1E1E;
            --color-card-hover: #252525;
            --color-text: #FFFFFF;
            --color-text-secondary: #D0D0D0;
            --color-text-muted: #B0B0B0;
            --color-text-weak: #888888;
            --color-border: rgba(255, 255, 255, 0.06);
            --color-border-light: rgba(255, 255, 255, 0.12);
            --color-danger: #FF3B30;
            --color-success: #00C853;
            --color-glow-orange: rgba(255, 77, 0, 0.35);
            --color-glow-cyan: rgba(0, 240, 255, 0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.6);
            --shadow-card-hover: 0 18px 50px rgba(0, 0, 0, 0.75);
            --shadow-btn: 0 4px 16px rgba(255, 77, 0, 0.3);
            --shadow-btn-hover: 0 8px 28px rgba(255, 77, 0, 0.5);
            --font-en: 'Inter', 'Roboto', 'Segoe UI', sans-serif;
            --font-zh: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Heiti SC', sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
            --max-width: 1200px;
            --section-padding-desktop: 120px;
            --section-padding-tablet: 80px;
            --section-padding-mobile: 60px;
            --nav-height: 68px;
        }

        *,
        *::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;
            text-rendering: optimizeLegibility;
        }

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

        .en-num {
            font-family: var(--font-en);
            letter-spacing: -0.01em;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            cursor: pointer;
        }

        input {
            cursor: text;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ============ NAVIGATION ============ */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
            background: transparent;
        }

        .nav.scrolled {
            background: rgba(18, 18, 18, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-text);
            white-space: nowrap;
            letter-spacing: 0.02em;
            z-index: 1001;
        }

        .nav-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), #ff7a3d);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 900;
            color: #fff;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
        }

        .nav-logo-icon::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.2) 50%, transparent 60%);
            animation: logoShine 3s ease-in-out infinite;
        }

        @keyframes logoShine {
            0%,
            100% {
                transform: translateX(-100%);
            }
            50% {
                transform: translateX(100%);
            }
        }

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

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: color var(--transition-smooth);
            position: relative;
            padding: 4px 0;
        }

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

        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: var(--color-text);
        }
        .nav-links a:hover::after,
        .nav-links a:focus-visible::after {
            transform: scaleX(1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-btn);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: #ff5c1a;
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
            color: #fff;
        }
        .nav-cta:active {
            transform: scale(0.96);
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            background: none;
            border: none;
            padding: 8px;
        }
        .nav-hamburger span {
            display: block;
            width: 28px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 3px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }
        .nav-hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 1023px) {
            .nav-hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 100%;
                height: 100vh;
                background: rgba(18, 18, 18, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 36px;
                transition: right var(--transition-smooth);
                z-index: 1000;
            }
            .nav-links.active {
                right: 0;
            }
            .nav-links a {
                font-size: 1.3rem;
                font-weight: 600;
            }
            .nav-cta {
                font-size: 1rem;
                padding: 14px 28px;
            }
        }

        @media (max-width: 768px) {
            .nav {
                background: rgba(18, 18, 18, 0.9);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
            }
            .nav-logo {
                font-size: 1rem;
            }
            .nav-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
        }

        /* ============ HERO ============ */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background-color: var(--color-bg);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            isolation: isolate;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(18, 18, 18, 0.55) 0%, rgba(18, 18, 18, 0.85) 60%, rgba(18, 18, 18, 0.95) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 25% 30%, rgba(255, 77, 0, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 65%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
            z-index: 2;
            pointer-events: none;
        }

        .hero-canvas {
            position: absolute;
            inset: 0;
            z-index: 3;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 4;
            text-align: center;
            max-width: 800px;
            padding: 0 24px;
            animation: fadeInUp 0.8s ease-out;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(255, 77, 0, 0.15);
            border: 1px solid rgba(255, 77, 0, 0.3);
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
            animation: fadeInUp 0.8s ease-out 0.1s both;
        }

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-text);
            margin-bottom: 18px;
            letter-spacing: 0.01em;
            animation: fadeInUp 0.8s ease-out 0.2s both;
        }

        .hero h1 .highlight {
            color: var(--color-primary);
            position: relative;
        }

        .hero h1 .highlight-accent {
            color: var(--color-accent);
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--color-text-muted);
            max-width: 580px;
            margin: 0 auto 32px;
            line-height: 1.7;
            animation: fadeInUp 0.8s ease-out 0.3s both;
        }

        .hero-cta-wrap {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            animation: fadeInUp 0.8s ease-out 0.4s both;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 36px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-btn);
            position: relative;
            overflow: hidden;
            border: none;
            cursor: pointer;
            letter-spacing: 0.02em;
        }

        .btn-primary:hover {
            background: #ff5c1a;
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-3px);
        }
        .btn-primary:active {
            transform: scale(0.96);
        }
        .btn-primary::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 50px;
            background: transparent;
            transition: all var(--transition-smooth);
        }
        .btn-primary:hover::after {
            box-shadow: 0 0 0 10px rgba(255, 77, 0, 0.18);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 36px;
            background: transparent;
            color: var(--color-text);
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: 50px;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            transition: all var(--transition-smooth);
            cursor: pointer;
            letter-spacing: 0.02em;
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.2);
            transform: translateY(-3px);
        }
        .btn-outline:active {
            transform: scale(0.96);
        }

        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.05rem;
            }
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 90vh;
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
            .hero-cta-wrap {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            .hero-cta-wrap .btn-primary,
            .hero-cta-wrap .btn-outline {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 5px 12px;
            }
        }

        /* ============ SECTION BASE ============ */
        .section {
            padding: var(--section-padding-desktop) 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--color-primary);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 14px;
            letter-spacing: 0.01em;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        @media (max-width: 1024px) {
            .section {
                padding: var(--section-padding-tablet) 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--section-padding-mobile) 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
                margin-bottom: 32px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ============ METRICS ============ */
        .metrics-section {
            background: var(--color-bg);
            position: relative;
            overflow: hidden;
        }
        .metrics-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background:
                repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(255, 255, 255, 0.012) 40px, rgba(255, 255, 255, 0.012) 41px),
                repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(255, 255, 255, 0.008) 60px, rgba(255, 255, 255, 0.008) 61px);
            pointer-events: none;
            z-index: 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }
        .metric-card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            text-align: center;
            border: 1px solid var(--color-border);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition-smooth);
        }
        .metric-card:hover::before {
            transform: scaleX(1);
        }
        .metric-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-light);
        }
        .metric-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--color-text);
            font-family: var(--font-en);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }
        .metric-number .unit {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-left: 2px;
        }
        .metric-label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            font-weight: 500;
            letter-spacing: 0.03em;
        }

        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .metric-number {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .metric-card {
                padding: 24px 14px;
            }
            .metric-number {
                font-size: 1.8rem;
            }
            .metric-number .unit {
                font-size: 1.1rem;
            }
            .metric-label {
                font-size: 0.78rem;
            }
        }

        /* ============ SERVICES ============ */
        .services-section {
            background: #0f0f0f;
            position: relative;
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            padding: 32px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            cursor: default;
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(0, 240, 255, 0.3);
        }
        .service-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .service-card:hover::after {
            opacity: 1;
        }
        .service-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(255, 77, 0, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-primary);
            margin-bottom: 20px;
            transition: all var(--transition-smooth);
            flex-shrink: 0;
        }
        .service-card:hover .service-icon {
            background: rgba(255, 77, 0, 0.22);
            transform: rotate(-6deg) scale(1.05);
            color: #ff6b2b;
        }
        .service-icon-img {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            margin-bottom: 20px;
            flex-shrink: 0;
            border: 2px solid rgba(255, 77, 0, 0.2);
            transition: all var(--transition-smooth);
        }
        .service-card:hover .service-icon-img {
            border-color: rgba(0, 240, 255, 0.5);
            transform: scale(1.05);
        }
        .service-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            letter-spacing: 0.01em;
        }
        .service-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            flex-grow: 1;
            margin-bottom: 16px;
        }
        .service-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-smooth);
            align-self: flex-start;
            cursor: pointer;
        }
        .service-link:hover {
            color: #66f5ff;
            gap: 8px;
        }
        .service-link i {
            font-size: 0.7rem;
            transition: transform var(--transition-smooth);
        }
        .service-link:hover i {
            transform: translateX(3px);
        }

        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 768px) {
            .services-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .service-card {
                padding: 24px;
            }
        }

        /* ============ COMPARISON ============ */
        .comparison-section {
            background: var(--color-bg);
            position: relative;
        }
        .comparison-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 70% 50%, rgba(0, 240, 255, 0.03) 0%, transparent 55%);
            pointer-events: none;
        }
        .comparison-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        .comparison-col {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-smooth);
        }
        .comparison-col.bad {
            opacity: 0.7;
            border-color: rgba(255, 59, 48, 0.2);
        }
        .comparison-col.good {
            border-color: rgba(0, 240, 255, 0.25);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.06);
        }
        .comparison-col.good:hover {
            border-color: rgba(0, 240, 255, 0.45);
            box-shadow: 0 0 60px rgba(0, 240, 255, 0.12);
            transform: translateY(-4px);
        }
        .comparison-col h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 24px;
            text-align: center;
            letter-spacing: 0.02em;
        }
        .comparison-col.bad h3 {
            color: var(--color-text-muted);
        }
        .comparison-col.good h3 {
            color: var(--color-accent);
        }
        .comparison-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .comparison-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.95rem;
            line-height: 1.5;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .comparison-list li:last-child {
            border-bottom: none;
        }
        .comparison-list .icon-x {
            color: var(--color-danger);
            font-size: 1.1rem;
            flex-shrink: 0;
            margin-top: 1px;
        }
        .comparison-list .icon-check {
            color: var(--color-success);
            font-size: 1.1rem;
            flex-shrink: 0;
            margin-top: 1px;
        }
        .comparison-col.good .comparison-list li {
            color: var(--color-text);
            font-weight: 500;
        }
        .comparison-col.bad .comparison-list li {
            color: var(--color-text-weak);
        }

        @media (max-width: 768px) {
            .comparison-wrap {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .comparison-col {
                padding: 28px 20px;
            }
        }

        /* ============ FAQ ============ */
        .faq-section {
            background: #0f0f0f;
        }
        .faq-list {
            max-width: 750px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition-smooth);
            position: relative;
        }
        .faq-item:hover {
            border-bottom-color: rgba(255, 77, 0, 0.3);
        }
        .faq-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--color-primary);
            transform: scaleY(0);
            transition: transform var(--transition-smooth);
            border-radius: 2px;
        }
        .faq-item:hover::before,
        .faq-item.open::before {
            transform: scaleY(1);
        }
        .faq-question {
            width: 100%;
            padding: 22px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            background: none;
            border: none;
            color: var(--color-text);
            font-size: 1.05rem;
            font-weight: 600;
            text-align: left;
            transition: color var(--transition-smooth);
            letter-spacing: 0.01em;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition-smooth);
            color: var(--color-text-muted);
        }
        .faq-item.open .faq-question .faq-icon {
            border-color: var(--color-primary);
            color: var(--color-primary);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.45s ease;
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 0;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 0 20px 0;
        }

        @media (max-width: 768px) {
            .faq-question {
                font-size: 0.95rem;
                padding: 18px 0;
            }
            .faq-answer {
                font-size: 0.85rem;
            }
        }

        /* ============ CTA / CONTACT ============ */
        .cta-section {
            background: var(--color-bg);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(255, 77, 0, 0.06) 0%, transparent 65%);
            pointer-events: none;
        }
        .cta-block {
            max-width: 560px;
            margin: 0 auto;
            text-align: center;
            background: linear-gradient(180deg, #1a1a1a 0%, #151515 100%);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            border: 1px solid rgba(0, 240, 255, 0.2);
            box-shadow: 0 0 50px rgba(0, 240, 255, 0.04);
            position: relative;
            z-index: 1;
        }
        .cta-badge {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.1);
            color: var(--color-accent);
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
        }
        .cta-block h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            letter-spacing: 0.01em;
        }
        .cta-block p {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            margin-bottom: 28px;
            line-height: 1.6;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .cta-input {
            flex: 1;
            min-width: 200px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: #111;
            border: 1.5px solid rgba(255, 255, 255, 0.12);
            padding: 0 18px;
            color: var(--color-text);
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4);
        }
        .cta-input:focus {
            border-color: var(--color-accent);
            outline: none;
            box-shadow: 0 0 0 4px rgba(0, 240, 255, 0.08), inset 0 2px 6px rgba(0, 0, 0, 0.4);
        }
        .cta-input::placeholder {
            color: #666;
        }
        .cta-submit {
            height: 56px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-btn);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }
        .cta-submit:hover {
            background: #ff5c1a;
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
        }
        .cta-submit:active {
            transform: scale(0.96);
        }
        .cta-submit::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-sm);
            transition: all var(--transition-smooth);
        }
        .cta-submit:hover::after {
            box-shadow: 0 0 0 10px rgba(255, 77, 0, 0.16);
        }

        @media (max-width: 520px) {
            .cta-block {
                padding: 32px 18px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-input {
                min-width: 100%;
            }
            .cta-submit {
                width: 100%;
                justify-content: center;
            }
            .cta-block h2 {
                font-size: 1.4rem;
            }
        }

        /* ============ FOOTER ============ */
        .footer {
            background: #0a0a0a;
            padding: 36px 0;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-logo-text {
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-text);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .footer-info {
            font-size: 0.8rem;
            color: var(--color-text-weak);
            line-height: 1.6;
        }
        .footer-info a {
            color: var(--color-text-muted);
            transition: color var(--transition-smooth);
        }
        .footer-info a:hover {
            color: var(--color-accent);
        }
        .footer-divider {
            display: inline-block;
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.2);
        }

        /* ============ SCROLL ANIMATIONS ============ */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(28px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ============ ACCESSIBILITY ============ */
        :focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 16px;
            background: var(--color-primary);
            color: #fff;
            padding: 8px 16px;
            border-radius: 4px;
            z-index: 9999;
            font-weight: 600;
            transition: top var(--transition-fast);
        }
        .skip-link:focus {
            top: 16px;
        }