/* roulang page: index */
:root {
            --color-primary: #1a6dbf;
            --color-primary-dark: #145a9e;
            --color-accent: #d4940e;
            --color-accent-dark: #b87d0b;
            --color-bg: #f6f8fb;
            --color-card: #ffffff;
            --color-text: #1e293b;
            --color-muted: #64748b;
            --color-border: #e2e8f0;
            --color-success: #0ea371;
            --color-footer: #1e293b;
            --radius-card: 12px;
            --radius-btn: 10px;
            --radius-small: 8px;
            --shadow-card: 0 1px 3px rgba(26, 109, 191, 0.05), 0 1px 2px rgba(26, 109, 191, 0.04);
            --shadow-card-hover: 0 4px 16px rgba(26, 109, 191, 0.10), 0 2px 4px rgba(26, 109, 191, 0.06);
            --shadow-nav: 0 1px 6px rgba(0, 0, 0, 0.06);
            --transition-base: all 0.25s ease;
            --transition-accordion: max-height 0.35s ease-in-out;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', 'system-ui', '-apple-system', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: #1e293b;
            background-color: #f6f8fb;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* ===== NAVIGATION ===== */
        #nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: #ffffff;
            transition: box-shadow 0.3s ease, background 0.3s ease;
            display: flex;
            align-items: center;
        }

        #nav.scrolled {
            box-shadow: var(--shadow-nav);
        }

        #nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            height: 100%;
        }

        @media (min-width: 1024px) {
            #nav .nav-inner {
                padding: 0 40px;
            }
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 700;
            color: #1a6dbf;
            letter-spacing: -0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-links-desktop {
            display: none;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

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

        .nav-links-desktop li a {
            font-size: 15px;
            font-weight: 500;
            color: #64748b;
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
        }

        .nav-links-desktop li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: #1a6dbf;
            transition: width 0.25s ease;
            border-radius: 2px;
        }

        .nav-links-desktop li a:hover,
        .nav-links-desktop li a.active {
            color: #1a6dbf;
        }
        .nav-links-desktop li a:hover::after,
        .nav-links-desktop li a.active::after {
            width: 100%;
        }

        .nav-cta-desktop {
            display: none;
            padding: 10px 20px;
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            background: #d4940e;
            border-radius: 10px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-cta-desktop:hover {
            background: #b87d0b;
            transform: scale(1.03);
        }
        @media (min-width: 1024px) {
            .nav-cta-desktop {
                display: inline-block;
            }
        }

        /* Hamburger */
        .hamburger {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            cursor: pointer;
            z-index: 1001;
            background: none;
            border: none;
            padding: 0;
            gap: 5px;
            flex-shrink: 0;
        }
        @media (min-width: 1024px) {
            .hamburger {
                display: none;
            }
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: #1e293b;
            border-radius: 2px;
            transition: all 0.3s ease;
            transform-origin: center;
        }
        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile menu */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(10, 26, 48, 0.95);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu a {
            display: block;
            color: #ffffff;
            font-size: 18px;
            font-weight: 500;
            padding: 12px 32px;
            text-align: center;
            width: 100%;
            max-width: 280px;
            border-radius: 8px;
            transition: all 0.2s ease;
        }
        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #d4940e;
        }
        .mobile-menu .mobile-cta {
            margin-top: 16px;
            background: #d4940e;
            color: #ffffff;
            font-weight: 600;
            border-radius: 10px;
            padding: 14px 32px;
            font-size: 17px;
        }
        .mobile-menu .mobile-cta:hover {
            background: #b87d0b;
            color: #ffffff;
            transform: scale(1.03);
        }

        /* ===== HERO ===== */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: #0a1a30;
            overflow: hidden;
            padding-top: 64px;
        }

        #hero .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }
        #hero .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.45;
        }
        #hero .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(135deg, rgba(10, 26, 48, 0.92) 30%, rgba(10, 26, 48, 0.55) 65%, rgba(10, 26, 48, 0.35) 100%);
        }

        #hero .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 40px;
            width: 100%;
        }

        @media (min-width: 1024px) {
            #hero .hero-content {
                flex-direction: row;
                align-items: center;
                gap: 60px;
            }
        }

        #hero .hero-text {
            flex: 0 0 100%;
            max-width: 560px;
        }
        @media (min-width: 1024px) {
            #hero .hero-text {
                flex: 0 0 55%;
            }
        }

        #hero .hero-text h1 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: #ffffff;
            margin: 0 0 16px;
        }
        @media (min-width: 768px) {
            #hero .hero-text h1 {
                font-size: 38px;
            }
        }
        @media (min-width: 1024px) {
            #hero .hero-text h1 {
                font-size: 44px;
            }
        }
        @media (min-width: 1280px) {
            #hero .hero-text h1 {
                font-size: 48px;
            }
        }

        #hero .hero-text h1 .highlight {
            color: #d4940e;
            position: relative;
            display: inline-block;
        }
        #hero .hero-text h1 .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            width: 100%;
            height: 3px;
            background: #d4940e;
            border-radius: 2px;
            opacity: 0.5;
        }

        #hero .hero-subtitle {
            font-size: 17px;
            line-height: 1.65;
            color: #cbd5e1;
            max-width: 480px;
            margin: 0 0 28px;
        }
        @media (min-width: 768px) {
            #hero .hero-subtitle {
                font-size: 18px;
            }
        }

        #hero .hero-cta {
            display: inline-block;
            padding: 15px 38px;
            font-size: 17px;
            font-weight: 600;
            color: #ffffff;
            background: #d4940e;
            border-radius: 10px;
            box-shadow: 0 0 28px rgba(212, 148, 14, 0.35), 0 4px 12px rgba(0, 0, 0, 0.2);
            transition: all 0.25s ease;
            letter-spacing: 0.02em;
        }
        #hero .hero-cta:hover {
            background: #b87d0b;
            transform: scale(1.04);
            box-shadow: 0 0 40px rgba(212, 148, 14, 0.5), 0 6px 20px rgba(0, 0, 0, 0.25);
        }

        #hero .hero-trust {
            margin-top: 16px;
            font-size: 13px;
            color: #94a3b8;
            letter-spacing: 0.02em;
        }

        #hero .hero-visual {
            flex: 0 0 100%;
            display: none;
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            min-height: 300px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            box-shadow: 0 0 60px rgba(26, 109, 191, 0.25), 0 8px 32px rgba(0, 0, 0, 0.3);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        @media (min-width: 768px) {
            #hero .hero-visual {
                display: block;
                flex: 0 0 100%;
                min-height: 350px;
            }
        }
        @media (min-width: 1024px) {
            #hero .hero-visual {
                flex: 0 0 45%;
                min-height: 420px;
            }
        }
        #hero .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 26, 48, 0.3) 0%, transparent 50%, rgba(10, 26, 48, 0.15) 100%);
            pointer-events: none;
        }
        #hero .hero-visual .pulse-dot {
            position: absolute;
            top: 20px;
            right: 24px;
            width: 14px;
            height: 14px;
            background: #0ea371;
            border-radius: 50%;
            z-index: 3;
            box-shadow: 0 0 10px #0ea371, 0 0 24px rgba(14, 163, 113, 0.6);
            animation: pulse 2s ease-in-out infinite;
        }
        @keyframes pulse {
            0%,
            100% {
                box-shadow: 0 0 10px #0ea371, 0 0 24px rgba(14, 163, 113, 0.6);
            }
            50% {
                box-shadow: 0 0 20px #0ea371, 0 0 40px rgba(14, 163, 113, 0.9);
            }
        }

        /* ===== SECTIONS COMMON ===== */
        .section {
            padding: 60px 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 80px 0;
            }
        }
        @media (min-width: 1024px) {
            .section {
                padding: 100px 0;
            }
        }

        .section-title {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-title h2 {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.35;
            color: #1e293b;
            margin: 0 0 12px;
        }
        @media (min-width: 768px) {
            .section-title h2 {
                font-size: 30px;
            }
        }
        @media (min-width: 1024px) {
            .section-title h2 {
                font-size: 34px;
            }
        }
        .section-title .title-accent {
            display: block;
            width: 44px;
            height: 3px;
            background: #1a6dbf;
            border-radius: 2px;
            margin: 0 auto;
        }
        .section-title p {
            color: #64748b;
            font-size: 16px;
            margin: 12px 0 0;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== SOLUTION CARDS ===== */
        #solution .cards-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }
        @media (min-width: 768px) {
            #solution .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            #solution .cards-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .solution-card {
            background: #ffffff;
            border-radius: 12px;
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: all 0.25s ease;
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            gap: 14px;
            position: relative;
            overflow: hidden;
        }
        @media (min-width: 768px) {
            .solution-card {
                padding: 30px;
            }
        }
        .solution-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(26, 109, 191, 0.15);
        }
        .solution-card .card-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(26, 109, 191, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .solution-card .card-icon svg {
            width: 22px;
            height: 22px;
            color: #1a6dbf;
        }
        .solution-card h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
            color: #1e293b;
            margin: 0;
        }
        .solution-card p {
            font-size: 15px;
            color: #64748b;
            line-height: 1.6;
            margin: 0;
            flex-grow: 1;
        }
        .solution-card .card-img {
            width: 100%;
            border-radius: 8px;
            overflow: hidden;
            margin-top: 4px;
        }
        .solution-card .card-img img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 8px;
            transition: transform 0.35s ease;
        }
        .solution-card:hover .card-img img {
            transform: scale(1.04);
        }
        .solution-card.card-tall .card-img img {
            height: 220px;
        }
        .solution-card.card-compact {
            gap: 10px;
        }

        /* ===== DATA PROOF ===== */
        #data-proof {
            background: #0f1f38;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }
        #data-proof .data-bg-pattern {
            position: absolute;
            inset: 0;
            opacity: 0.06;
            background-image: radial-gradient(circle at 20% 30%, #1a6dbf 1px, transparent 1px), radial-gradient(circle at 70% 60%, #d4940e 1px, transparent 1px);
            background-size: 40px 40px, 60px 60px;
            pointer-events: none;
        }
        #data-proof .section-title h2 {
            color: #ffffff;
        }
        #data-proof .section-title .title-accent {
            background: #d4940e;
        }
        #data-proof .section-title p {
            color: #cbd5e1;
        }

        .data-dashboard {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            position: relative;
            z-index: 1;
        }
        @media (min-width: 768px) {
            .data-dashboard {
                grid-template-columns: repeat(4, 1fr);
                gap: 24px;
            }
        }
        .data-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            padding: 28px 20px;
            text-align: center;
            transition: all 0.25s ease;
        }
        .data-item:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(212, 148, 14, 0.3);
            box-shadow: 0 0 30px rgba(26, 109, 191, 0.15);
        }
        .data-number {
            font-family: 'SF Mono', 'Menlo', 'Consolas', 'monospace';
            font-size: 38px;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
        }
        @media (min-width: 768px) {
            .data-number {
                font-size: 44px;
            }
        }
        @media (min-width: 1024px) {
            .data-number {
                font-size: 52px;
            }
        }
        .data-number.gold {
            color: #d4940e;
        }
        .data-number.blue {
            color: #1a6dbf;
        }
        .data-number.green {
            color: #0ea371;
        }
        .data-label {
            font-size: 14px;
            color: #94a3b8;
            letter-spacing: 0.03em;
            margin-bottom: 4px;
        }
        .data-trend {
            font-size: 12px;
            color: #0ea371;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 4px;
        }
        .data-trend svg {
            width: 14px;
            height: 14px;
        }

        /* ===== TESTIMONIALS ===== */
        #testimonials .testimonials-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        @media (min-width: 768px) {
            #testimonials .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            #testimonials .testimonials-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .testimonial-card {
            background: #ffffff;
            border-radius: 12px;
            padding: 26px;
            box-shadow: var(--shadow-card);
            border-left: 3px solid #1a6dbf;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-left-color: #d4940e;
        }
        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .testimonial-avatar svg {
            width: 22px;
            height: 22px;
            color: #64748b;
        }
        .testimonial-user {
            font-weight: 600;
            font-size: 15px;
            color: #1e293b;
        }
        .testimonial-tag {
            font-size: 12px;
            color: #64748b;
        }
        .testimonial-stars {
            display: flex;
            gap: 2px;
            color: #d4940e;
        }
        .testimonial-stars svg {
            width: 15px;
            height: 15px;
            fill: #d4940e;
        }
        .testimonial-body {
            font-size: 15px;
            line-height: 1.6;
            color: #475569;
            font-style: italic;
            margin: 0;
        }

        /* ===== FAQ ===== */
        #faq .faq-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-item.active {
            border-color: #1a6dbf;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: #1e293b;
            cursor: pointer;
            text-align: left;
            gap: 12px;
            transition: background 0.2s ease;
            font-family: inherit;
        }
        @media (min-width: 768px) {
            .faq-question {
                font-size: 17px;
            }
        }
        .faq-question:hover {
            background: #f1f5f9;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.35s ease;
            color: #64748b;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: #1a6dbf;
        }
        .faq-answer-wrapper {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-in-out;
        }
        .faq-item.active .faq-answer-wrapper {
            max-height: 300px;
        }
        .faq-answer {
            padding: 0 20px 16px 20px;
            font-size: 15px;
            color: #64748b;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        #cta {
            background: #eef3f9;
            text-align: center;
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }
        @media (min-width: 768px) {
            #cta {
                padding: 90px 0;
            }
        }
        #cta .cta-bg-dots {
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0.04;
            background-image: radial-gradient(circle, #1a6dbf 2px, transparent 2px);
            background-size: 32px 32px;
        }
        #cta .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
            padding: 0 20px;
        }
        #cta h2 {
            font-size: 26px;
            font-weight: 700;
            color: #1e293b;
            margin: 0 0 12px;
            letter-spacing: -0.01em;
        }
        @media (min-width: 768px) {
            #cta h2 {
                font-size: 30px;
            }
        }
        #cta .cta-subtitle {
            font-size: 16px;
            color: #64748b;
            margin: 0 0 28px;
        }
        #cta .cta-btn {
            display: inline-block;
            padding: 16px 48px;
            font-size: 18px;
            font-weight: 600;
            color: #ffffff;
            background: #d4940e;
            border-radius: 10px;
            box-shadow: 0 0 32px rgba(212, 148, 14, 0.3), 0 4px 14px rgba(0, 0, 0, 0.1);
            transition: all 0.25s ease;
            letter-spacing: 0.02em;
        }
        #cta .cta-btn:hover {
            background: #b87d0b;
            transform: scale(1.04);
            box-shadow: 0 0 44px rgba(212, 148, 14, 0.45), 0 6px 20px rgba(0, 0, 0, 0.15);
        }
        #cta .cta-trust {
            margin-top: 16px;
            font-size: 13px;
            color: #64748b;
            letter-spacing: 0.02em;
        }

        /* ===== FOOTER ===== */
        #footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 48px 0 20px;
        }
        #footer .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        @media (min-width: 768px) {
            #footer .footer-grid {
                grid-template-columns: 2fr 1fr 1fr 1.5fr;
                gap: 40px;
            }
        }
        #footer .footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
        }
        #footer .footer-brand-desc {
            font-size: 14px;
            color: #94a3b8;
            line-height: 1.6;
            max-width: 260px;
        }
        #footer h4 {
            font-size: 14px;
            font-weight: 600;
            color: #ffffff;
            margin: 0 0 12px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        #footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        #footer ul li a {
            font-size: 14px;
            color: #94a3b8;
            transition: color 0.2s ease;
        }
        #footer ul li a:hover {
            color: #ffffff;
        }
        #footer .footer-contact {
            font-size: 14px;
            color: #94a3b8;
            word-break: break-all;
        }
        #footer .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 16px;
            font-size: 13px;
            color: #64748b;
            text-align: center;
        }

        /* ===== RESPONSIVE FINE-TUNING ===== */
        @media (max-width: 639px) {
            .data-dashboard {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .data-number {
                font-size: 32px;
            }
            .data-item {
                padding: 20px 14px;
            }
            #hero .hero-text h1 {
                font-size: 28px;
            }
            #hero .hero-subtitle {
                font-size: 15px;
            }
            #hero .hero-cta {
                padding: 14px 28px;
                font-size: 16px;
            }
            #hero .hero-visual {
                min-height: 220px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title h2 {
                font-size: 24px;
            }
            #cta {
                padding: 50px 0;
            }
            #cta h2 {
                font-size: 22px;
            }
            #cta .cta-btn {
                padding: 14px 32px;
                font-size: 16px;
            }
            .solution-card {
                padding: 20px;
            }
            .testimonial-card {
                padding: 20px;
            }
        }

        @media (min-width: 640px) and (max-width: 767px) {
            #hero .hero-text h1 {
                font-size: 32px;
            }
            #hero .hero-visual {
                min-height: 280px;
            }
            .data-dashboard {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .data-number {
                font-size: 36px;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            #solution .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            #testimonials .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            #hero .hero-text h1 {
                font-size: 36px;
            }
            #hero .hero-visual {
                min-height: 340px;
            }
        }

        /* Focus visible polyfill */
        .focus-visible {
            outline: 2px solid #1a6dbf;
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* 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-width: 0;
        }