/* roulang page: index */
:root {
            --brand-blue: #1A56DB;
            --brand-purple: #7C3AED;
            --brand-cyan: #10B981;
            --text-dark: #0F172A;
            --text-mid: #475569;
            --text-light: #94A3B8;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --border-color: #E2E8F0;
            --footer-bg: #1E293B;
            --radius-card: 16px;
            --radius-btn: 8px;
            --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-nav: 0 2px 16px rgba(0, 0, 0, 0.06);
            --section-pad: 100px;
            --section-pad-mobile: 60px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: #475569;
            background-color: #F8FAFC;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

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

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

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

        input {
            font-family: inherit;
            font-size: inherit;
        }

        /* Container */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

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

        /* Navigation */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: box-shadow var(--transition-smooth), background var(--transition-smooth);
            display: flex;
            align-items: center;
        }

        #site-header.scrolled {
            box-shadow: var(--shadow-nav);
            background: rgba(255, 255, 255, 0.98);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #0F172A;
            white-space: nowrap;
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #1A56DB 0%, #7C3AED 100%);
            border-radius: 10px;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .nav-logo .logo-accent {
            background: linear-gradient(135deg, #1A56DB 0%, #7C3AED 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: #475569;
            position: relative;
            padding: 4px 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #1A56DB, #7C3AED);
            border-radius: 2px;
            transition: width var(--transition-fast);
        }

        .nav-links a:hover {
            color: #1A56DB;
        }
        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            background: #1A56DB;
            color: #fff !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
        }

        .nav-cta-btn:hover {
            background: #1547b8;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.35);
            transform: translateY(-1px);
        }
        .nav-cta-btn::after {
            display: none !important;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            background: transparent;
            border: none;
            width: 40px;
            height: 32px;
            justify-content: center;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: #0F172A;
            border-radius: 2px;
            transition: all var(--transition-fast);
            transform-origin: center;
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                bottom: 0;
                background: #fff;
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 40px;
                gap: 28px;
                transform: translateX(100%);
                transition: transform var(--transition-smooth);
                z-index: 999;
                font-size: 1.1rem;
            }
            .nav-links.open {
                transform: translateX(0);
            }
            .nav-cta-btn {
                margin-top: 8px;
            }
            .nav-inner {
                padding: 0 16px;
            }
        }

        /* Hero */
        #hero {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            background-position: center 30%;
            overflow: hidden;
            margin-top: 0;
            padding-top: 72px;
        }

        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(248, 250, 252, 0.88) 0%,
                    rgba(248, 250, 252, 0.78) 40%,
                    rgba(218, 225, 240, 0.7) 70%,
                    rgba(200, 210, 235, 0.65) 100%);
            z-index: 1;
        }

        #hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 1;
            pointer-events: none;
            animation: heroGlow 8s ease-in-out infinite;
        }

        @keyframes heroGlow {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(-30px, 20px) scale(1.08);
            }
            66% {
                transform: translate(15px, -15px) scale(0.95);
            }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 80px 24px;
            width: 100%;
        }

        .hero-text {
            flex: 1 1 55%;
            min-width: 0;
        }
        .hero-visual {
            flex: 0 0 380px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(124, 58, 237, 0.1);
            color: #7C3AED;
            font-weight: 600;
            font-size: 0.85rem;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            background: #10B981;
            border-radius: 50%;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
            }
        }

        .hero-text h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            font-weight: 700;
            color: #0F172A;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .hero-text h1 .gradient-text {
            background: linear-gradient(135deg, #1A56DB 0%, #7C3AED 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: #475569;
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 520px;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: #1A56DB;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-btn);
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: #1547b8;
            box-shadow: 0 6px 22px rgba(26, 86, 219, 0.4);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: transparent;
            color: #1A56DB;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid #1A56DB;
            border-radius: var(--radius-btn);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-ghost:hover {
            background: rgba(26, 86, 219, 0.06);
            border-color: #1547b8;
            color: #1547b8;
            transform: translateY(-2px);
        }
        .btn-ghost:active {
            transform: scale(0.98);
        }

        .hero-visual-card {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(226, 232, 240, 0.6);
            display: flex;
            flex-direction: column;
            gap: 16px;
            min-width: 280px;
        }
        .hero-visual-card .stat-row {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid #E2E8F0;
        }
        .hero-visual-card .stat-row:last-child {
            border-bottom: none;
        }
        .hero-visual-card .stat-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .stat-icon.purple {
            background: rgba(124, 58, 237, 0.12);
            color: #7C3AED;
        }
        .stat-icon.blue {
            background: rgba(26, 86, 219, 0.1);
            color: #1A56DB;
        }
        .stat-icon.green {
            background: rgba(16, 185, 129, 0.12);
            color: #10B981;
        }
        .hero-visual-card .stat-info .stat-val {
            font-weight: 700;
            font-size: 1.05rem;
            color: #0F172A;
            font-family: "Inter", system-ui, sans-serif;
        }
        .hero-visual-card .stat-info .stat-label {
            font-size: 0.8rem;
            color: #94A3B8;
        }

        @media (max-width: 1024px) {
            .hero-content {
                flex-direction: column;
                gap: 32px;
                text-align: center;
                padding: 60px 24px;
            }
            .hero-text h1 {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-btns {
                justify-content: center;
            }
            .hero-visual {
                flex: 0 0 auto;
                width: 100%;
                max-width: 380px;
            }
            .hero-badge {
                margin-left: auto;
                margin-right: auto;
                display: inline-flex;
            }
        }
        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-ghost {
                justify-content: center;
                text-align: center;
            }
            #hero {
                min-height: auto;
            }
            .hero-content {
                padding: 50px 16px;
            }
        }

        /* Section common */
        .section {
            padding: var(--section-pad) 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--section-pad-mobile) 0;
            }
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: #7C3AED;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: #0F172A;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .section-desc {
            font-size: 1.05rem;
            color: #475569;
            max-width: 600px;
            line-height: 1.7;
        }
        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }

        /* Services */
        #services {
            background: #fff;
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }
        .service-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 32px 24px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            gap: 12px;
            text-align: center;
        }
        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: #E2E8F0;
        }
        .service-icon-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin: 0 auto;
            flex-shrink: 0;
        }
        .service-icon-circle.blue-bg {
            background: rgba(26, 86, 219, 0.1);
            color: #1A56DB;
        }
        .service-icon-circle.purple-bg {
            background: rgba(124, 58, 237, 0.1);
            color: #7C3AED;
        }
        .service-icon-circle.cyan-bg {
            background: rgba(16, 185, 129, 0.1);
            color: #10B981;
        }
        .service-icon-circle.amber-bg {
            background: rgba(245, 158, 11, 0.1);
            color: #f59e0b;
        }
        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #0F172A;
        }
        .service-card p {
            font-size: 0.9rem;
            color: #64748b;
            line-height: 1.6;
            flex-grow: 1;
        }
        .service-card .learn-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #1A56DB;
            transition: gap var(--transition-fast);
            cursor: pointer;
            margin-top: auto;
        }
        .service-card .learn-more:hover {
            gap: 10px;
        }

        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .service-card {
                padding: 24px 20px;
                text-align: left;
                flex-direction: row;
                flex-wrap: wrap;
                align-items: flex-start;
                gap: 8px 12px;
            }
            .service-icon-circle {
                margin: 0;
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
            }
            .service-card h3 {
                flex: 1;
            }
            .service-card p {
                flex-basis: 100%;
            }
        }

        /* Data / Stats */
        #data {
            background: #1E293B;
            position: relative;
            overflow: hidden;
        }
        #data::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        #data::after {
            content: '';
            position: absolute;
            bottom: -20%;
            right: -10%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: #10B981;
            font-family: "Inter", system-ui, sans-serif;
            letter-spacing: -0.02em;
            line-height: 1;
        }
        .stat-item .stat-number.blue-num {
            color: #60a5fa;
        }
        .stat-item .stat-number.purple-num {
            color: #a78bfa;
        }
        .stat-item .stat-desc {
            color: #cbd5e1;
            font-size: 0.95rem;
            margin-top: 8px;
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .stat-item .stat-number {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* Cases */
        #cases {
            background: #F8FAFC;
        }
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 48px;
        }
        .case-card {
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            cursor: pointer;
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .case-card .case-img-wrap {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #e2e8f0;
        }
        .case-card .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .case-card:hover .case-img-wrap img {
            transform: scale(1.06);
        }
        .case-card .case-img-wrap .case-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(26, 56, 219, 0.5) 0%, transparent 60%);
            opacity: 0;
            transition: opacity var(--transition-smooth);
            display: flex;
            align-items: flex-end;
            justify-content: center;
            padding-bottom: 20px;
        }
        .case-card:hover .case-img-wrap .case-overlay {
            opacity: 1;
        }
        .case-overlay .view-btn {
            background: #fff;
            color: #1A56DB;
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }
        .case-overlay .view-btn:hover {
            background: #f1f5f9;
            transform: scale(1.04);
        }
        .case-card .case-info {
            padding: 20px 20px 24px;
        }
        .case-card .case-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 50px;
            margin-bottom: 8px;
        }
        .case-tag.tag-purple {
            background: rgba(124, 58, 237, 0.1);
            color: #7C3AED;
        }
        .case-tag.tag-blue {
            background: rgba(26, 86, 219, 0.1);
            color: #1A56DB;
        }
        .case-tag.tag-green {
            background: rgba(16, 185, 129, 0.1);
            color: #10B981;
        }
        .case-card .case-info h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #0F172A;
            margin-bottom: 4px;
        }
        .case-card .case-info p {
            font-size: 0.85rem;
            color: #64748b;
            line-height: 1.5;
        }
        @media (max-width: 1024px) {
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .cases-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* Solution / Process */
        #solution {
            background: #fff;
        }
        .process-steps {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 16px;
            margin-top: 48px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 10%;
            right: 10%;
            height: 3px;
            background: linear-gradient(90deg, #1A56DB, #7C3AED, #10B981, #1A56DB);
            border-radius: 2px;
            z-index: 0;
        }
        .process-step {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 1;
            min-width: 0;
        }
        .step-circle {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: #1A56DB;
            color: #fff;
            font-weight: 700;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-family: "Inter", system-ui, sans-serif;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3);
            position: relative;
            z-index: 2;
        }
        .step-circle.s2 {
            background: #7C3AED;
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.3);
        }
        .step-circle.s3 {
            background: #10B981;
            box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
        }
        .step-circle.s4 {
            background: #1A56DB;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3);
        }
        .process-step h4 {
            font-weight: 600;
            color: #0F172A;
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: #64748b;
            line-height: 1.5;
            max-width: 200px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .process-steps {
                flex-direction: column;
                align-items: center;
                gap: 28px;
            }
            .process-steps::before {
                top: 0;
                left: 50%;
                bottom: 0;
                right: auto;
                width: 3px;
                height: auto;
                transform: translateX(-50%);
            }
            .process-step {
                display: flex;
                align-items: center;
                gap: 16px;
                text-align: left;
                width: 100%;
                max-width: 380px;
            }
            .step-circle {
                margin: 0;
                width: 52px;
                height: 52px;
                font-size: 1.2rem;
                flex-shrink: 0;
            }
            .process-step p {
                max-width: none;
            }
        }

        /* FAQ */
        #faq {
            background: #F8FAFC;
        }
        .faq-list {
            max-width: 760px;
            margin: 40px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: 12px;
            border: 1px solid #E2E8F0;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item.open {
            border-color: #cbd5e1;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: #0F172A;
            text-align: left;
            background: transparent;
            border: none;
            cursor: pointer;
            transition: background var(--transition-fast);
            font-family: inherit;
        }
        .faq-question:hover {
            background: #f8fafc;
        }
        .faq-q-badge {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: #1A56DB;
            color: #fff;
            font-weight: 700;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: "Inter", system-ui, sans-serif;
        }
        .faq-arrow {
            margin-left: auto;
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            color: #94A3B8;
            font-size: 0.9rem;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: #1A56DB;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 20px 68px;
            color: #475569;
            font-size: 0.95rem;
            line-height: 1.7;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
                gap: 10px;
            }
            .faq-answer-inner {
                padding: 0 16px 16px 58px;
            }
            .faq-q-badge {
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
            }
        }

        /* CTA */
        #contact {
            background: linear-gradient(135deg, #eef2ff 0%, #f0f4ff 30%, #f5f3ff 70%, #eef2ff 100%);
            position: relative;
            overflow: hidden;
        }
        #contact::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        #contact::after {
            content: '';
            position: absolute;
            bottom: -25%;
            left: -15%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(26, 86, 219, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 650px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #0F172A;
            margin-bottom: 12px;
        }
        .cta-inner p {
            font-size: 1.05rem;
            color: #475569;
            margin-bottom: 28px;
        }
        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 36px;
            background: #fff;
            color: #1A56DB;
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: var(--radius-btn);
            transition: all var(--transition-fast);
            box-shadow: 0 4px 20px rgba(26, 86, 219, 0.2);
            border: 2px solid transparent;
        }
        .btn-cta-large:hover {
            background: #1A56DB;
            color: #fff;
            box-shadow: 0 6px 28px rgba(26, 86, 219, 0.35);
            transform: translateY(-2px);
        }
        .btn-cta-large:active {
            transform: scale(0.97);
        }
        .cta-subnote {
            font-size: 0.85rem;
            color: #94A3B8;
            margin-top: 14px;
        }
        @media (max-width: 520px) {
            .cta-inner h2 {
                font-size: 1.6rem;
            }
            .btn-cta-large {
                padding: 14px 28px;
                font-size: 1rem;
            }
        }

        /* Footer */
        #site-footer {
            background: #1E293B;
            color: #cbd5e1;
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: #94a3b8;
            line-height: 1.6;
        }
        .footer-col h4 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 16px;
            font-size: 0.95rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .social-icons {
            display: flex;
            gap: 12px;
            margin-top: 14px;
        }
        .social-icons a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            transition: all var(--transition-fast);
            font-size: 1rem;
        }
        .social-icons a:hover {
            background: #1A56DB;
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* Decorative floating elements */
        .floating-decor {
            position: absolute;
            pointer-events: none;
            opacity: 0.18;
            font-size: 2rem;
            z-index: 0;
            animation: floatDecor 6s ease-in-out infinite;
        }
        @keyframes floatDecor {
            0%,
            100% {
                transform: translateY(0) rotate(0deg);
            }
            50% {
                transform: translateY(-20px) rotate(8deg);
            }
        }
        .floating-decor.d1 {
            top: 15%;
            left: 8%;
            animation-delay: 0s;
            color: #7C3AED;
        }
        .floating-decor.d2 {
            top: 25%;
            right: 10%;
            animation-delay: 2s;
            color: #1A56DB;
        }
        .floating-decor.d3 {
            bottom: 20%;
            left: 12%;
            animation-delay: 4s;
            color: #10B981;
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid #1A56DB;
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* Smooth section entry */
        @media (prefers-reduced-motion: no-preference) {
            .section {
                opacity: 1;
            }
        }