/* roulang page: index */
:root {
            --primary: #FF6600;
            --primary-dark: #E55A00;
            --primary-light: #FF8533;
            --primary-bg: #FFF5F0;
            --graphite: #1E1E2E;
            --graphite-light: #2A2A3D;
            --stone-gray: #F5F5F5;
            --border-light: #E5E7EB;
            --border-mid: #D1D5DB;
            --text-primary: #1A1A2E;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --text-on-dark: #F9FAFB;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 24px 56px rgba(0, 0, 0, 0.14);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-pill: 50px;
            --radius-full: 9999px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 64px;
            --spacing-2xl: 80px;
            --spacing-3xl: 120px;
            --max-width: 1280px;
            --max-width-text: 680px;
            --nav-height: 72px;
            --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: 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--white);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

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

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

        ul {
            list-style: none;
        }

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

        @media (min-width: 768px) {
            .container {
                padding: 0 var(--spacing-lg);
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding: 0 var(--spacing-xl);
            }
        }

        /* ============ NAVIGATION ============ */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 var(--spacing-md);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth), color var(--transition-smooth);
            background: transparent;
            color: var(--white);
        }

        .navbar.scrolled {
            background: var(--white);
            color: var(--text-primary);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: 'Noto Sans SC', sans-serif;
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: 0.5px;
            white-space: nowrap;
            z-index: 1001;
            color: inherit;
            text-decoration: none;
        }

        .nav-logo svg {
            width: 34px;
            height: 34px;
            flex-shrink: 0;
        }

        .nav-logo .logo-dot {
            fill: var(--primary);
            transition: fill var(--transition-fast);
        }

        .navbar.scrolled .nav-logo .logo-dot {
            fill: var(--primary);
        }

        .nav-links {
            display: none;
            gap: var(--spacing-lg);
            align-items: center;
        }

        @media (min-width: 1024px) {
            .nav-links {
                display: flex;
                gap: 36px;
            }
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            position: relative;
            padding: 6px 0;
            color: inherit;
            transition: color var(--transition-fast);
            min-height: 44px;
            display: flex;
            align-items: center;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            transition: width var(--transition-smooth);
        }

        .nav-links a:hover::after,
        .nav-links a:focus-visible::after {
            width: 100%;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .navbar.scrolled .nav-links a:hover {
            color: var(--primary);
        }

        .nav-cta {
            display: none;
            background: var(--primary);
            color: #fff !important;
            padding: 10px 22px !important;
            border-radius: var(--radius-pill);
            font-weight: 600 !important;
            font-size: 0.9rem !important;
            transition: background var(--transition-fast), transform var(--transition-fast) !important;
            min-height: 44px;
            align-items: center;
            white-space: nowrap;
        }

        .nav-cta::after {
            display: none !important;
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            transform: translateY(-1px);
        }

        @media (min-width: 1024px) {
            .nav-cta {
                display: flex;
            }
        }

        /* Hamburger */
        .hamburger {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            gap: 6px;
            z-index: 1001;
            cursor: pointer;
            background: none;
            border: none;
            padding: 0;
            position: relative;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: currentColor;
            border-radius: 2px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(8.5px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-8.5px) rotate(-45deg);
        }

        @media (min-width: 1024px) {
            .hamburger {
                display: none;
            }
        }

        /* Mobile menu overlay */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: var(--graphite);
            z-index: 999;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

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

        .mobile-menu a {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--white);
            letter-spacing: 1px;
            padding: 12px 24px;
            min-height: 44px;
            display: flex;
            align-items: center;
            position: relative;
            transition: color var(--transition-fast);
        }

        .mobile-menu a::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 24px;
            right: 24px;
            height: 2px;
            background: var(--primary);
            transform: scaleX(0);
            transition: transform var(--transition-smooth);
            border-radius: 1px;
        }

        .mobile-menu a:hover::after,
        .mobile-menu a:focus-visible::after {
            transform: scaleX(1);
        }

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

        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #fff !important;
            border-radius: var(--radius-pill);
            padding: 14px 32px !important;
            margin-top: 8px;
        }

        .mobile-menu .mobile-cta::after {
            display: none;
        }

        .mobile-menu .mobile-cta:hover {
            background: var(--primary-dark) !important;
            color: #fff !important;
        }

        /* ============ HERO ============ */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--graphite);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(165deg,
                    rgba(255, 102, 0, 0.78) 0%,
                    rgba(30, 30, 46, 0.65) 45%,
                    rgba(30, 30, 46, 0.88) 100%);
            transform: skewY(-3deg) scale(1.1);
            transform-origin: top left;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            padding-top: var(--nav-height);
            padding-bottom: var(--spacing-2xl);
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 100vh;
        }

        .hero-content {
            max-width: 620px;
            animation: fadeInUp 0.8s ease-out;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(36px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            letter-spacing: 1px;
            margin-bottom: var(--spacing-md);
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .hero h1 {
            font-family: 'Noto Sans SC', 'Bebas Neue', 'Impact', sans-serif;
            font-weight: 900;
            font-size: 3.2rem;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: var(--spacing-sm);
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

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

        .hero-subtitle {
            font-size: 1.1rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: var(--spacing-lg);
            max-width: 480px;
            font-weight: 400;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.3px;
            border-radius: var(--radius-pill);
            padding: 14px 32px;
            min-height: 48px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            cursor: pointer;
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
            box-shadow: 0 6px 24px rgba(255, 102, 0, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            padding-right: 44px;
            box-shadow: 0 8px 30px rgba(255, 102, 0, 0.45);
            transform: translateY(-2px);
        }

        .btn-primary::after {
            content: '→';
            position: absolute;
            right: 18px;
            opacity: 0;
            transform: translateX(-10px);
            transition: all var(--transition-smooth);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .btn-primary:hover::after {
            opacity: 1;
            transform: translateX(0);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.7);
        }

        .btn-outline:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        @media (max-width: 767px) {
            .hero h1 {
                font-size: 2.3rem;
                line-height: 1.2;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .hero-buttons .btn {
                width: 100%;
                text-align: center;
            }
            .hero-overlay {
                transform: skewY(-2deg) scale(1.05);
            }
            .hero-bg {
                background-position: center 25%;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .hero h1 {
                font-size: 2.8rem;
            }
        }

        @media (min-width: 1024px) {
            .hero h1 {
                font-size: 3.8rem;
                letter-spacing: -0.8px;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
        }

        /* ============ SECTIONS GENERAL ============ */
        .section {
            padding: var(--spacing-3xl) 0;
        }

        @media (max-width: 767px) {
            .section {
                padding: var(--spacing-2xl) 0;
            }
        }

        .section-header {
            margin-bottom: var(--spacing-xl);
            position: relative;
        }

        .section-header h2 {
            font-family: 'Noto Sans SC', sans-serif;
            font-weight: 700;
            font-size: 2.2rem;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            position: relative;
            display: inline-block;
        }

        .section-header h2::before {
            content: '';
            position: absolute;
            left: -20px;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 40px;
            background: var(--primary);
            border-radius: 3px;
        }

        @media (max-width: 767px) {
            .section-header h2 {
                font-size: 1.7rem;
                padding-left: 16px;
            }
            .section-header h2::before {
                left: 0;
                width: 4px;
                height: 30px;
                border-radius: 2px;
            }
        }

        .section-header.center {
            text-align: center;
        }

        .section-header.center h2::before {
            left: 50%;
            transform: translate(-50%, -50%);
            top: -16px;
            width: 50px;
            height: 4px;
            border-radius: 2px;
        }

        @media (max-width: 767px) {
            .section-header.center h2::before {
                width: 36px;
                height: 3px;
                top: -12px;
            }
        }

        /* ============ SERVICES ============ */
        #services {
            background: var(--white);
            position: relative;
        }

        #services .watermark {
            position: absolute;
            top: 40px;
            right: 5%;
            font-family: 'Bebas Neue', 'Impact', sans-serif;
            font-size: 10rem;
            color: rgba(255, 102, 0, 0.03);
            pointer-events: none;
            line-height: 1;
            z-index: 0;
            letter-spacing: 4px;
        }

        @media (max-width: 767px) {
            #services .watermark {
                font-size: 4rem;
                top: 60px;
                right: 8%;
            }
        }

        .services-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: var(--spacing-md);
            position: relative;
            z-index: 1;
        }

        @media (min-width: 768px) {
            .services-grid {
                grid-template-columns: 2fr 1fr 2fr;
                gap: var(--spacing-lg);
                align-items: start;
            }
        }

        .service-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .service-card:hover {
            box-shadow: var(--shadow-lg);
            border-left: 4px solid var(--primary);
            border-top-color: var(--border-mid);
            border-right-color: var(--border-mid);
            border-bottom-color: var(--border-mid);
        }

        .service-card.featured {
            background: linear-gradient(160deg, #FFF8F3 0%, #FFF5F0 40%, #FFEEE2 100%);
            border-color: var(--primary);
            border-width: 2px;
            box-shadow: var(--shadow-md);
            transform: translateY(-12px);
            z-index: 2;
        }

        .service-card.featured:hover {
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-xl);
            transform: translateY(-14px);
        }

        @media (max-width: 767px) {
            .service-card.featured {
                transform: none;
            }
            .service-card.featured:hover {
                transform: translateY(-2px);
            }
        }

        .service-icon {
            width: 52px;
            height: 52px;
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
        }

        .service-card.featured .service-icon {
            background: var(--primary);
        }

        .service-card.featured .service-icon svg {
            color: #fff;
        }

        .service-icon svg {
            width: 28px;
            height: 28px;
            color: var(--primary);
        }

        .service-card h3 {
            font-family: 'Noto Sans SC', sans-serif;
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text-primary);
            letter-spacing: 0.2px;
        }

        .service-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ============ STATS ============ */
        #stats {
            background: var(--graphite);
            padding: var(--spacing-2xl) 0;
            overflow: hidden;
            position: relative;
        }

        #stats::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(255, 102, 0, 0.10) 0%, transparent 70%);
            pointer-events: none;
            animation: pulseGlow 4s ease-in-out infinite;
        }

        @keyframes pulseGlow {
            0%,
            100% {
                opacity: 0.5;
                transform: scale(1);
            }
            50% {
                opacity: 0.9;
                transform: scale(1.08);
            }
        }

        .stats-scroll {
            display: flex;
            gap: var(--spacing-xl);
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding: var(--spacing-md) 0;
            position: relative;
            z-index: 1;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .stats-scroll::-webkit-scrollbar {
            display: none;
        }

        .stat-item {
            flex: 0 0 auto;
            min-width: 180px;
            scroll-snap-align: start;
            text-align: center;
            padding: var(--spacing-md) var(--spacing-lg);
        }

        .stat-number {
            font-family: 'Bebas Neue', 'Noto Sans SC', 'Impact', sans-serif;
            font-size: 4rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            letter-spacing: 1px;
            display: block;
        }

        .stat-unit {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 400;
            letter-spacing: 0.5px;
            margin-top: 4px;
            display: block;
        }

        @media (min-width: 768px) {
            .stats-scroll {
                justify-content: space-around;
                gap: var(--spacing-2xl);
                overflow-x: visible;
            }
            .stat-item {
                min-width: auto;
                flex: 0 1 auto;
            }
            .stat-number {
                font-size: 5rem;
            }
        }

        /* ============ CASES ============ */
        #cases {
            background: var(--stone-gray);
            position: relative;
        }

        .cases-layout {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
        }

        @media (min-width: 768px) {
            .cases-layout {
                flex-direction: row;
                align-items: stretch;
                gap: var(--spacing-xl);
            }
        }

        .cases-list {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .case-item {
            padding: var(--spacing-md);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            background: transparent;
            text-align: left;
            display: block;
            width: 100%;
        }

        .case-item:hover,
        .case-item:focus-visible {
            background: var(--white);
            border-left-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .case-item.active {
            background: var(--white);
            border-left-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .case-item .case-name {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 4px;
            letter-spacing: 0.2px;
        }

        .case-item .case-result {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .case-item .case-arrow {
            display: inline-block;
            color: var(--primary);
            font-weight: 700;
            margin-left: 4px;
            transition: transform var(--transition-fast);
        }

        .case-item.active .case-arrow,
        .case-item:hover .case-arrow {
            transform: translateX(4px);
        }

        .cases-image-area {
            flex: 1;
            min-height: 300px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background: var(--graphite-light);
            position: relative;
        }

        .cases-image-area img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
            transition: opacity var(--transition-smooth);
            border-radius: var(--radius-lg);
        }

        @media (max-width: 767px) {
            .cases-image-area {
                min-height: 240px;
                order: -1;
            }
        }

        /* ============ SOLUTIONS ============ */
        #solutions {
            background: var(--white);
        }

        .timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 36px;
        }

        @media (min-width: 768px) {
            .timeline {
                flex-direction: row;
                padding-left: 0;
                padding-top: 40px;
                gap: 0;
                justify-content: space-between;
                align-items: flex-start;
            }
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 22px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-mid);
            border-radius: 1px;
        }

        @media (min-width: 768px) {
            .timeline::before {
                left: 5%;
                right: 5%;
                top: 58px;
                bottom: auto;
                width: auto;
                height: 2px;
            }
        }

        .timeline-node {
            position: relative;
            padding: var(--spacing-md) 0 var(--spacing-lg) 28px;
            z-index: 1;
        }

        @media (min-width: 768px) {
            .timeline-node {
                padding: 0;
                text-align: center;
                flex: 1;
                max-width: 200px;
            }
        }

        .timeline-dot {
            position: absolute;
            left: -7px;
            top: 28px;
            width: 20px;
            height: 20px;
            background: var(--white);
            border: 3px solid var(--primary);
            border-radius: 50%;
            z-index: 2;
            transition: all var(--transition-smooth);
            animation: dotPulse 2.5s ease-in-out infinite;
        }

        @media (min-width: 768px) {
            .timeline-dot {
                left: 50%;
                top: -10px;
                transform: translateX(-50%);
            }
        }

        .timeline-node:nth-child(2) .timeline-dot {
            animation-delay: 0.6s;
        }
        .timeline-node:nth-child(3) .timeline-dot {
            animation-delay: 1.2s;
        }
        .timeline-node:nth-child(4) .timeline-dot {
            animation-delay: 1.8s;
        }

        @keyframes dotPulse {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 102, 0, 0.4);
            }
            50% {
                box-shadow: 0 0 0 14px rgba(255, 102, 0, 0);
            }
        }

        .timeline-number {
            font-family: 'Bebas Neue', 'Impact', sans-serif;
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            letter-spacing: 1px;
            display: block;
            margin-bottom: 4px;
        }

        @media (min-width: 768px) {
            .timeline-number {
                font-size: 2.6rem;
                margin-bottom: 8px;
            }
        }

        .timeline-title {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 4px;
            letter-spacing: 0.2px;
        }

        .timeline-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ============ FAQ ============ */
        #faq {
            background: var(--stone-gray);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .faq-item {
            border-bottom: 1px dashed var(--border-mid);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: var(--spacing-md) 0;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            transition: color var(--transition-fast);
            min-height: 48px;
            letter-spacing: 0.2px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 400;
            color: var(--primary);
            border-radius: 50%;
            background: var(--white);
            transition: all var(--transition-smooth);
            border: 1px solid var(--border-light);
        }

        .faq-item[open] summary::after {
            content: '−';
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: rotate(180deg);
        }

        .faq-item[open] summary {
            color: var(--primary);
        }

        .faq-item[open] {
            background: linear-gradient(180deg, rgba(255, 245, 240, 0.7) 0%, rgba(255, 245, 240, 0.2) 100%);
            border-radius: var(--radius-md);
            margin: 4px -12px;
            padding: 0 12px;
            border-bottom-color: transparent;
        }

        .faq-answer {
            padding: 0 0 var(--spacing-md) 0;
            color: var(--text-secondary);
            line-height: 1.75;
            font-size: 0.95rem;
            max-width: 680px;
        }

        /* ============ CONTACT CTA ============ */
        #contact {
            background: linear-gradient(155deg, #FF6600 0%, #FF7B28 30%, #FF5500 70%, #E55A00 100%);
            padding: var(--spacing-3xl) 0;
            position: relative;
            overflow: hidden;
        }

        @media (max-width: 767px) {
            #contact {
                padding: var(--spacing-2xl) 0;
            }
        }

        #contact::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 55%;
            height: 160%;
            background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
            animation: pulseGlow 5s ease-in-out infinite;
        }

        .contact-layout {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xl);
            position: relative;
            z-index: 1;
        }

        @media (min-width: 768px) {
            .contact-layout {
                flex-direction: row;
                align-items: center;
                gap: var(--spacing-2xl);
            }
        }

        .contact-text {
            flex: 1;
            color: #fff;
        }

        .contact-text h2 {
            font-family: 'Noto Sans SC', sans-serif;
            font-weight: 700;
            font-size: 2rem;
            letter-spacing: -0.5px;
            margin-bottom: var(--spacing-sm);
        }

        .contact-text p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.7;
            max-width: 440px;
        }

        @media (max-width: 767px) {
            .contact-text h2 {
                font-size: 1.6rem;
            }
            .contact-text p {
                font-size: 0.95rem;
            }
        }

        .contact-form-area {
            flex: 1;
            background: rgba(255, 255, 255, 0.97);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-xl);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .form-row {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        @media (min-width: 576px) {
            .form-row {
                flex-direction: row;
                gap: var(--spacing-sm);
            }
            .form-row .form-group {
                flex: 1;
            }
        }

        .form-group {
            position: relative;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 4px;
            font-size: 0.95rem;
            color: var(--text-primary);
            border-bottom: 2px solid #E5E7EB;
            background: transparent;
            transition: border-color var(--transition-fast);
            border-radius: 0;
            letter-spacing: 0.2px;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-bottom-color: var(--primary);
            outline: none;
        }

        .form-group label {
            position: absolute;
            left: 4px;
            top: 14px;
            font-size: 0.9rem;
            color: var(--text-muted);
            pointer-events: none;
            transition: all var(--transition-fast);
            letter-spacing: 0.3px;
        }

        .form-group input:focus+label,
        .form-group input:not(:placeholder-shown)+label,
        .form-group textarea:focus+label,
        .form-group textarea:not(:placeholder-shown)+label {
            top: -12px;
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: transparent;
        }

        .form-group textarea {
            min-height: 90px;
            resize: vertical;
        }

        .btn-submit {
            align-self: flex-start;
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
            padding: 14px 36px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.3px;
            cursor: pointer;
            transition: all var(--transition-smooth);
            min-height: 48px;
        }

        .btn-submit:hover {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 6px 24px rgba(255, 102, 0, 0.25);
            transform: translateY(-2px);
        }

        @media (max-width: 575px) {
            .btn-submit {
                width: 100%;
                text-align: center;
            }
        }

        .contact-illustration {
            display: none;
        }

        @media (min-width: 768px) {
            .contact-illustration {
                display: flex;
                align-items: center;
                justify-content: center;
                flex: 0 0 140px;
            }
            .contact-illustration svg {
                width: 120px;
                height: 200px;
                opacity: 0.7;
            }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--graphite);
            color: rgba(255, 255, 255, 0.8);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
        }

        .footer-grid {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-lg);
        }

        @media (min-width: 768px) {
            .footer-grid {
                flex-direction: row;
                justify-content: space-between;
                align-items: flex-start;
                gap: var(--spacing-2xl);
            }
        }

        .footer-brand {
            max-width: 320px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }

        .footer-logo svg {
            width: 30px;
            height: 30px;
        }

        .footer-logo .logo-dot {
            fill: var(--primary);
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
        }

        .footer-nav {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
        }

        .footer-nav a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color var(--transition-fast);
            padding: 4px 0;
            letter-spacing: 0.3px;
        }

        .footer-nav a:hover {
            color: var(--primary);
        }

        .footer-info {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
            text-align: right;
            line-height: 1.8;
        }

        @media (max-width: 767px) {
            .footer-info {
                text-align: left;
            }
            .footer-grid {
                gap: var(--spacing-md);
            }
        }

        .footer-bottom {
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            letter-spacing: 0.3px;
        }

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

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(255, 102, 0, 0.5);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ============ RESPONSIVE FINE-TUNING ============ */
        @media (max-width: 575px) {
            .btn {
                padding: 12px 24px;
                font-size: 0.95rem;
                min-height: 44px;
            }
            .btn-primary:hover {
                padding-right: 38px;
            }
            .btn-primary::after {
                right: 12px;
                font-size: 1rem;
            }
        }

        @media (min-width: 1280px) {
            .hero h1 {
                font-size: 4.2rem;
            }
            .hero-subtitle {
                font-size: 1.25rem;
            }
            .stat-number {
                font-size: 5.5rem;
            }
        }