/* roulang page: index */
:root {
            --color-primary: #1A1F3D;
            --color-accent: #00E4FF;
            --color-emphasis: #FF4D2E;
            --color-bg-deep: #0B0E14;
            --color-bg-mid: #141A28;
            --color-bg-panel: rgba(255, 255, 255, 0.03);
            --color-text-primary: #ffffff;
            --color-text-body: rgba(255, 255, 255, 0.85);
            --color-text-muted: rgba(255, 255, 255, 0.55);
            --color-border-glass: rgba(0, 228, 255, 0.15);
            --color-border-glow: rgba(0, 228, 255, 0.45);
            --radius-card: 16px;
            --radius-btn: 50px;
            --radius-input: 12px;
            --radius-icon: 20px;
            --radius-section: 24px;
            --shadow-card: 0 8px 32px rgba(0, 228, 255, 0.08);
            --shadow-card-hover: 0 12px 40px rgba(0, 228, 255, 0.20);
            --shadow-btn-glow: 0 0 28px rgba(0, 228, 255, 0.45), 0 4px 20px rgba(255, 77, 46, 0.30);
            --font-h1: 3.5rem;
            --font-h2: 2.5rem;
            --font-h3: 1.75rem;
            --font-body: 1rem;
            --font-sm: 0.875rem;
            --font-weight-bold: 700;
            --font-weight-extrabold: 800;
            --font-weight-regular: 400;
            --line-height-h1: 1.1;
            --line-height-h2: 1.2;
            --line-height-h3: 1.3;
            --line-height-body: 1.7;
            --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--header-height);
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: "Inter", "SF Pro Display", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-weight: var(--font-weight-regular);
            font-size: var(--font-body);
            line-height: var(--line-height-body);
            color: var(--color-text-body);
            background: var(--color-bg-deep);
            background-image: radial-gradient(ellipse at 50% 0%, rgba(0, 228, 255, 0.06) 0%, transparent 70%), radial-gradient(ellipse at 80% 20%, rgba(255, 77, 46, 0.04) 0%, transparent 60%), radial-gradient(ellipse at 20% 60%, rgba(0, 228, 255, 0.04) 0%, transparent 55%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }

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

        /* ===== HEADER / NAV ===== */
        .header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            width: calc(100% - 48px);
            max-width: calc(var(--container-max) - 48px);
            background: rgba(10, 15, 30, 0.78);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(0, 228, 255, 0.12);
            border-radius: 50px;
            padding: 0 28px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }
        .header.scrolled {
            top: 8px;
            background: rgba(10, 15, 30, 0.9);
            box-shadow: 0 8px 32px rgba(0, 228, 255, 0.12);
            border-color: rgba(0, 228, 255, 0.22);
        }
        .header .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .header .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-accent), #00b8d4);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #0B0E14;
            font-weight: 800;
            box-shadow: 0 0 18px rgba(0, 228, 255, 0.35);
            transition: box-shadow var(--transition-fast);
        }
        .header .logo-icon:hover {
            box-shadow: 0 0 28px rgba(0, 228, 255, 0.55);
        }
        .header .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }
        .header .logo-text span {
            color: var(--color-accent);
        }
        .header .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.8);
            position: relative;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .header .nav-links a:hover,
        .header .nav-links a.active {
            color: var(--color-accent);
        }
        .header .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 20px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--color-accent), 0 0 20px rgba(0, 228, 255, 0.6);
            transition: transform var(--transition-fast);
        }
        .header .nav-links a:hover::after,
        .header .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .header .btn-nav-cta {
            display: inline-block;
            padding: 9px 22px;
            border-radius: 24px;
            font-size: 0.85rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--color-accent), #00b8d4);
            color: #0B0E14 !important;
            transition: all var(--transition-fast);
            box-shadow: 0 0 16px rgba(0, 228, 255, 0.3);
            white-space: nowrap;
        }
        .header .btn-nav-cta:hover {
            box-shadow: 0 0 28px rgba(0, 228, 255, 0.55);
            transform: translateY(-1px);
        }
        .header .btn-nav-cta::after {
            display: none !important;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 8px;
            background: transparent;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 3px;
            transition: all var(--transition-fast);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 1024px) {
            .header .nav-links {
                gap: 2px;
            }
            .header .nav-links a {
                padding: 6px 10px;
                font-size: 0.82rem;
            }
            .header .btn-nav-cta {
                padding: 7px 14px;
                font-size: 0.78rem;
            }
        }
        @media (max-width: 768px) {
            .header {
                top: 10px;
                width: calc(100% - 24px);
                border-radius: 40px;
                padding: 0 18px;
                height: 50px;
            }
            .header .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(10, 15, 30, 0.94);
                backdrop-filter: blur(28px);
                -webkit-backdrop-filter: blur(28px);
                flex-direction: column;
                padding: 90px 30px 30px;
                gap: 8px;
                transition: right var(--transition-smooth);
                z-index: 999;
                border-left: 1px solid rgba(0, 228, 255, 0.15);
            }
            .header .nav-links.open {
                right: 0;
            }
            .header .nav-links a {
                font-size: 1rem;
                padding: 12px 16px;
                width: 100%;
                text-align: left;
                border-radius: 12px;
            }
            .header .nav-links a::after {
                display: none;
            }
            .header .nav-links a:hover {
                background: rgba(0, 228, 255, 0.08);
            }
            .header .btn-nav-cta {
                text-align: center;
                width: 100%;
                margin-top: 8px;
                padding: 12px;
            }
            .hamburger {
                display: flex;
            }
            .mobile-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.5);
                z-index: 998;
            }
            .mobile-overlay.show {
                display: block;
            }
        }

        /* ===== HERO ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            background: linear-gradient(180deg, #0B0E14 0%, #111827 30%, #141A28 60%, #0B0E14 100%);
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
            mix-blend-mode: overlay;
        }
        .hero-bg-fallback {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 40% 30%, rgba(0, 228, 255, 0.12) 0%, transparent 55%), radial-gradient(ellipse at 70% 60%, rgba(255, 77, 46, 0.08) 0%, transparent 50%);
            z-index: 0;
        }
        .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            overflow: hidden;
        }
        .hero-particle {
            position: absolute;
            width: 3px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 50%;
            box-shadow: 0 0 12px var(--color-accent), 0 0 24px rgba(0, 228, 255, 0.5);
            animation: floatUp linear infinite;
        }
        .hero-particle:nth-child(1) {
            left: 10%;
            animation-duration: 7s;
            animation-delay: 0s;
        }
        .hero-particle:nth-child(2) {
            left: 25%;
            animation-duration: 9s;
            animation-delay: 1.5s;
            width: 2px;
            height: 2px;
        }
        .hero-particle:nth-child(3) {
            left: 40%;
            animation-duration: 8s;
            animation-delay: 3s;
        }
        .hero-particle:nth-child(4) {
            left: 55%;
            animation-duration: 10s;
            animation-delay: 0.8s;
            width: 4px;
            height: 4px;
        }
        .hero-particle:nth-child(5) {
            left: 70%;
            animation-duration: 7.5s;
            animation-delay: 2.2s;
        }
        .hero-particle:nth-child(6) {
            left: 85%;
            animation-duration: 8.5s;
            animation-delay: 3.8s;
            width: 2px;
            height: 2px;
        }
        .hero-particle:nth-child(7) {
            left: 15%;
            animation-duration: 6.5s;
            animation-delay: 4.5s;
            background: var(--color-emphasis);
            box-shadow: 0 0 14px var(--color-emphasis), 0 0 22px rgba(255, 77, 46, 0.5);
        }
        .hero-particle:nth-child(8) {
            left: 60%;
            animation-duration: 11s;
            animation-delay: 5s;
            width: 3px;
            height: 3px;
            background: var(--color-emphasis);
            box-shadow: 0 0 12px var(--color-emphasis), 0 0 20px rgba(255, 77, 46, 0.4);
        }
        @keyframes floatUp {
            0% {
                transform: translateY(105vh) translateX(0);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            85% {
                opacity: 0.6;
            }
            100% {
                transform: translateY(-10vh) translateX(40px);
                opacity: 0;
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            background: rgba(0, 228, 255, 0.08);
            border: 1px solid rgba(0, 228, 255, 0.25);
            margin-bottom: 24px;
            letter-spacing: 0.04em;
            animation: fadeInUp 0.7s ease-out;
        }
        .hero h1 {
            font-size: var(--font-h1);
            font-weight: var(--font-weight-extrabold);
            line-height: var(--line-height-h1);
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
            animation: fadeInUp 0.7s ease-out 0.15s both;
            background: linear-gradient(180deg, #ffffff 0%, #e0f7ff 60%, #b8ecff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 60px rgba(0, 228, 255, 0.3);
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--color-accent), #00d4f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 36px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            animation: fadeInUp 0.7s ease-out 0.3s both;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
            animation: fadeInUp 0.7s ease-out 0.45s both;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
            cursor: pointer;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--color-accent), #00b8d4);
            color: #0B0E14;
            box-shadow: var(--shadow-btn-glow);
            border: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 38px rgba(0, 228, 255, 0.6), 0 6px 24px rgba(255, 77, 46, 0.35);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--color-accent);
            box-shadow: 0 0 20px rgba(0, 228, 255, 0.2);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.88rem;
            border-radius: 30px;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .hero-btns {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            .hero-btns .btn {
                width: 100%;
                max-width: 300px;
            }
        }

        /* ===== SECTION COMMON ===== */
        .section {
            padding: 90px 0;
            position: relative;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 12px;
            padding: 5px 14px;
            border-radius: 20px;
            background: rgba(0, 228, 255, 0.06);
            border: 1px solid rgba(0, 228, 255, 0.2);
        }
        .section h2 {
            font-size: var(--font-h2);
            font-weight: var(--font-weight-bold);
            line-height: var(--line-height-h2);
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .section .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 600px;
            margin-bottom: 48px;
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section h2 {
                font-size: 1.8rem;
            }
            .section .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== SERVICES ===== */
        #services {
            background: linear-gradient(180deg, #0B0E14 0%, #101520 50%, #0B0E14 100%);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: start;
        }
        .service-card {
            background: var(--color-bg-panel);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--color-border-glass);
            border-radius: var(--radius-card);
            padding: 32px 26px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            cursor: default;
            box-shadow: var(--shadow-card);
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            background: radial-gradient(circle, rgba(0, 228, 255, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            transition: all var(--transition-smooth);
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-glow);
            background: rgba(255, 255, 255, 0.05);
        }
        .service-card:hover::before {
            top: -30px;
            right: -30px;
            width: 140px;
            height: 140px;
            background: radial-gradient(circle, rgba(0, 228, 255, 0.2) 0%, transparent 70%);
        }
        .service-card.featured {
            transform: translateY(-12px);
            border-color: rgba(0, 228, 255, 0.3);
            box-shadow: 0 10px 36px rgba(0, 228, 255, 0.13);
        }
        .service-card.featured:hover {
            transform: translateY(-16px);
        }
        .service-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-icon);
            background: rgba(0, 228, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 1.5rem;
            color: var(--color-accent);
            transition: all var(--transition-fast);
            overflow: hidden;
        }
        .service-card .card-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-icon);
        }
        .service-card:hover .card-icon {
            box-shadow: 0 0 22px rgba(0, 228, 255, 0.35);
            background: rgba(0, 228, 255, 0.18);
        }
        .service-card h3 {
            font-size: var(--font-h3);
            font-weight: var(--font-weight-bold);
            line-height: var(--line-height-h3);
            color: #fff;
            margin-bottom: 10px;
        }
        .service-card p {
            font-size: var(--font-sm);
            color: var(--color-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .service-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-accent);
            transition: gap var(--transition-fast);
        }
        .service-card .card-link:hover {
            gap: 10px;
        }
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .service-card.featured {
                transform: translateY(0);
            }
            .service-card.featured:hover {
                transform: translateY(-8px);
            }
        }
        @media (max-width: 640px) {
            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .service-card {
                padding: 24px 20px;
            }
            .service-card.featured {
                transform: translateY(0);
            }
            .service-card.featured:hover {
                transform: translateY(-6px);
            }
        }

        /* ===== ADVANTAGES ===== */
        #advantages {
            background: #0B0E14;
        }
        .advantages-panel {
            background: var(--color-bg-panel);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--color-border-glass);
            border-radius: var(--radius-section);
            padding: 48px 40px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
            position: relative;
            overflow: hidden;
        }
        .advantages-panel::after {
            content: '';
            position: absolute;
            top: -80px;
            left: 30%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 228, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
            z-index: 1;
        }
        .advantage-item {
            text-align: center;
            padding: 20px 16px;
            border-radius: var(--radius-card);
            transition: all var(--transition-fast);
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid transparent;
        }
        .advantage-item:hover {
            background: rgba(0, 228, 255, 0.04);
            border-color: rgba(0, 228, 255, 0.2);
        }
        .advantage-item .adv-number {
            font-size: 3rem;
            font-weight: var(--font-weight-extrabold);
            line-height: 1;
            margin-bottom: 8px;
            background: linear-gradient(135deg, var(--color-accent), #00d4f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 40px rgba(0, 228, 255, 0.25);
            display: inline-block;
        }
        .advantage-item .adv-number.orange {
            background: linear-gradient(135deg, var(--color-emphasis), #ff7043);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(255, 77, 46, 0.25);
        }
        .advantage-item .adv-label {
            font-size: var(--font-sm);
            color: var(--color-text-muted);
            font-weight: 500;
        }
        @media (max-width: 1024px) {
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .advantages-panel {
                padding: 36px 24px;
            }
        }
        @media (max-width: 640px) {
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .advantage-item .adv-number {
                font-size: 2.2rem;
            }
            .advantages-panel {
                padding: 28px 16px;
                border-radius: 20px;
            }
        }

        /* ===== CASES ===== */
        #cases {
            background: linear-gradient(180deg, #0B0E14 0%, #101520 50%, #0B0E14 100%);
        }
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .case-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            aspect-ratio: 16 / 10;
            cursor: pointer;
            border: 1px solid rgba(0, 228, 255, 0.1);
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }
        .case-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .case-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-card-hover);
        }
        .case-card:hover img {
            transform: scale(1.08);
        }
        .case-card .case-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px 18px;
            background: linear-gradient(transparent, rgba(11, 14, 20, 0.92));
            z-index: 2;
        }
        .case-card .case-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: var(--color-accent);
            background: rgba(0, 228, 255, 0.15);
            padding: 4px 10px;
            border-radius: 12px;
            margin-bottom: 6px;
        }
        .case-card .case-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
        }
        .case-card .case-hover-info {
            position: absolute;
            inset: 0;
            background: rgba(11, 14, 20, 0.78);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity var(--transition-smooth);
            z-index: 3;
            border-radius: var(--radius-card);
        }
        .case-card:hover .case-hover-info {
            opacity: 1;
        }
        .case-hover-info span {
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            border: 2px solid var(--color-accent);
            padding: 8px 20px;
            border-radius: 24px;
            box-shadow: 0 0 20px rgba(0, 228, 255, 0.3);
        }
        @media (max-width: 1024px) {
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 640px) {
            .cases-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .case-card .case-overlay {
                padding: 12px 10px;
            }
            .case-card .case-title {
                font-size: 0.8rem;
            }
        }

        /* ===== SOLUTIONS ===== */
        #solutions {
            background: #0B0E14;
        }
        .timeline {
            position: relative;
            padding-left: 50px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 23px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--color-accent), rgba(0, 228, 255, 0.3), rgba(255, 77, 46, 0.4), var(--color-emphasis));
            border-radius: 3px;
            box-shadow: 0 0 18px rgba(0, 228, 255, 0.3);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 40px;
            padding-left: 28px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: -36px;
            top: 6px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--color-accent);
            box-shadow: 0 0 18px rgba(0, 228, 255, 0.55), 0 0 36px rgba(0, 228, 255, 0.3);
            z-index: 2;
            border: 3px solid #0B0E14;
        }
        .timeline-item:nth-child(even) .timeline-dot {
            background: var(--color-emphasis);
            box-shadow: 0 0 18px rgba(255, 77, 46, 0.55), 0 0 36px rgba(255, 77, 46, 0.3);
        }
        .timeline-card {
            background: var(--color-bg-panel);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--color-border-glass);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }
        .timeline-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-card-hover);
        }
        .timeline-card .step-num {
            font-size: 0.75rem;
            font-weight: 800;
            letter-spacing: 0.06em;
            color: var(--color-accent);
            margin-bottom: 6px;
        }
        .timeline-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .timeline-card p {
            font-size: var(--font-sm);
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .timeline {
                padding-left: 36px;
            }
            .timeline::before {
                left: 16px;
            }
            .timeline-dot {
                left: -28px;
                width: 13px;
                height: 13px;
            }
            .timeline-item {
                padding-left: 18px;
                margin-bottom: 28px;
            }
            .timeline-card {
                padding: 18px 16px;
            }
        }
        @media (max-width: 520px) {
            .timeline {
                padding-left: 28px;
            }
            .timeline::before {
                left: 11px;
            }
            .timeline-dot {
                left: -22px;
                width: 10px;
                height: 10px;
                top: 8px;
            }
            .timeline-item {
                padding-left: 10px;
            }
        }

        /* ===== FAQ ===== */
        #faq {
            background: linear-gradient(180deg, #0B0E14 0%, #101520 50%, #0B0E14 100%);
        }
        .faq-wrapper {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 36px;
            align-items: start;
        }
        .faq-question-list {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .faq-q-btn {
            display: block;
            width: 100%;
            text-align: left;
            padding: 14px 18px;
            border-radius: 12px;
            font-size: 0.9rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.75);
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition-fast);
            position: relative;
        }
        .faq-q-btn:hover {
            color: #fff;
            background: rgba(0, 228, 255, 0.05);
            border-color: rgba(0, 228, 255, 0.2);
        }
        .faq-q-btn.active {
            color: var(--color-accent);
            background: rgba(0, 228, 255, 0.07);
            border-color: rgba(0, 228, 255, 0.35);
            box-shadow: 0 0 16px rgba(0, 228, 255, 0.12);
        }
        .faq-q-btn.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 12px;
            bottom: 12px;
            width: 3px;
            background: var(--color-accent);
            border-radius: 3px;
            box-shadow: 0 0 10px var(--color-accent);
        }
        .faq-answer-panel {
            background: var(--color-bg-panel);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--color-border-glass);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            min-height: 200px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }
        .faq-answer-panel.glow {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-card-hover);
        }
        .faq-answer-panel h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .faq-answer-panel p {
            font-size: var(--font-sm);
            color: var(--color-text-muted);
            line-height: 1.7;
        }
        .faq-mobile-accordion {
            display: none;
        }
        @media (max-width: 768px) {
            .faq-wrapper {
                display: none;
            }
            .faq-mobile-accordion {
                display: flex;
                flex-direction: column;
                gap: 12px;
            }
            .faq-mobile-item {
                background: var(--color-bg-panel);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                border: 1px solid var(--color-border-glass);
                border-radius: var(--radius-card);
                overflow: hidden;
                transition: all var(--transition-fast);
                box-shadow: var(--shadow-card);
            }
            .faq-mobile-item.active {
                border-color: var(--color-border-glow);
                box-shadow: var(--shadow-card-hover);
            }
            .faq-mobile-q {
                width: 100%;
                text-align: left;
                padding: 16px 18px;
                font-size: 0.95rem;
                font-weight: 600;
                color: #fff;
                display: flex;
                justify-content: space-between;
                align-items: center;
                cursor: pointer;
                background: transparent;
                border: none;
                transition: all var(--transition-fast);
            }
            .faq-mobile-q i {
                transition: transform var(--transition-fast);
                color: var(--color-accent);
                font-size: 0.85rem;
            }
            .faq-mobile-item.active .faq-mobile-q i {
                transform: rotate(180deg);
            }
            .faq-mobile-a {
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), padding 0.45s ease;
                padding: 0 18px;
                font-size: var(--font-sm);
                color: var(--color-text-muted);
                line-height: 1.7;
            }
            .faq-mobile-item.active .faq-mobile-a {
                max-height: 300px;
                padding: 0 18px 18px 18px;
            }
        }

        /* ===== CTA / CONTACT ===== */
        #contact {
            background: linear-gradient(180deg, #0B0E14 0%, #0d1520 40%, #141A28 100%);
            position: relative;
            overflow: hidden;
        }
        #contact::before {
            content: '';
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 228, 255, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: var(--font-h2);
            font-weight: var(--font-weight-bold);
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-inner .cta-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            margin-bottom: 32px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            max-width: 620px;
            margin: 0 auto 20px;
        }
        .cta-form input {
            flex: 1 1 180px;
            min-width: 160px;
            padding: 14px 18px;
            border-radius: var(--radius-input);
            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-fast);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .cta-form input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 16px rgba(0, 228, 255, 0.2);
            background: rgba(255, 255, 255, 0.06);
            outline: none;
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .cta-form .btn-primary {
            flex: 0 0 auto;
        }
        @media (max-width: 640px) {
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-form input {
                width: 100%;
                max-width: 360px;
            }
            .cta-form .btn-primary {
                width: 100%;
                max-width: 360px;
            }
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: #080b10;
            border-top: 1px solid rgba(0, 228, 255, 0.1);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .footer-logo .fl-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--color-accent), #00b8d4);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #0B0E14;
            font-weight: 800;
            box-shadow: 0 0 14px rgba(0, 228, 255, 0.3);
        }
        .footer-brand .footer-logo span {
            font-size: 1.15rem;
            font-weight: 800;
            color: #fff;
        }
        .footer-brand p {
            font-size: var(--font-sm);
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.04em;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: var(--font-sm);
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 6px;
            flex-wrap: wrap;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            transition: all var(--transition-fast);
        }
        .footer-social a:hover {
            color: var(--color-accent);
            border-color: var(--color-accent);
            box-shadow: 0 0 16px rgba(0, 228, 255, 0.25);
            background: rgba(0, 228, 255, 0.06);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: var(--color-accent);
            font-weight: 600;
        }
        .footer-bottom a:hover {
            text-decoration: underline;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== UTILITY ===== */
        .text-center {
            text-align: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }