/* roulang page: index */
:root {
            --bg-primary: #FFFFFF;
            --bg-secondary: #F6F6F6;
            --bg-dark: #111111;
            --bg-darker: #0A0A0A;
            --text-primary: #1A1A1A;
            --text-secondary: #4A4A4A;
            --text-muted: #666666;
            --text-light: #999999;
            --text-white: #FFFFFF;
            --accent: #FF5500;
            --accent-hover: #E64D00;
            --accent-dark: #CC4400;
            --accent-light: rgba(255, 85, 0, 0.08);
            --success: #1CC88A;
            --border: #E5E5E5;
            --border-light: #F0F0F0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-btn: 40px;
            --shadow-card: 0px 8px 30px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0px 16px 40px rgba(0, 0, 0, 0.08);
            --shadow-btn: 0px 4px 14px rgba(255, 85, 0, 0.25);
            --shadow-btn-hover: 0px 8px 24px rgba(255, 85, 0, 0.35);
            --font-heading: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --section-gap: 120px;
            --section-gap-mobile: 80px;
            --container-max: 1200px;
            --container-padding: 24px;
            --container-padding-mobile: 16px;
            --nav-height: 72px;
            --transition-fast: 0.2s ease-out;
            --transition-normal: 0.25s ease-out;
            --transition-slow: 0.35s ease-out;
            --transition-spring: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-body);
            font-weight: 400;
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-secondary);
            background-color: var(--bg-primary);
            overflow-x: hidden;
            min-height: 100vh;
        }

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

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-padding);
            padding-right: var(--container-padding);
        }

        /* ============ NAVIGATION ============ */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: background-color var(--transition-normal), box-shadow var(--transition-normal), backdrop-filter var(--transition-normal);
            background-color: transparent;
            backdrop-filter: none;
            -webkit-backdrop-filter: none;
        }
        .nav.scrolled {
            background-color: rgba(17, 17, 17, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0px 2px 20px rgba(0, 0, 0, 0.15);
        }
        .nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .nav-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 22px;
            letter-spacing: -0.3px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0;
            color: #FFFFFF;
            transition: color var(--transition-normal);
            z-index: 1001;
        }
        .nav.scrolled .nav-logo {
            color: #FFFFFF;
        }
        .nav-logo .logo-accent {
            color: #FFFFFF;
            transition: color var(--transition-normal);
        }
        .nav.scrolled .nav-logo .logo-accent {
            color: var(--accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
        }
        .nav-links a {
            font-family: var(--font-body);
            font-weight: 500;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.9);
            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-color: var(--accent);
            border-radius: 2px;
            transition: width var(--transition-normal);
        }
        .nav-links a:hover {
            color: #FFFFFF;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav.scrolled .nav-links a {
            color: rgba(255, 255, 255, 0.85);
        }
        .nav.scrolled .nav-links a:hover {
            color: #FFFFFF;
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            z-index: 1001;
            padding: 6px;
            background: none;
            border: none;
            width: 36px;
            height: 28px;
            justify-content: center;
            align-items: center;
        }
        .nav-hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background-color: #FFFFFF;
            border-radius: 2px;
            transition: all var(--transition-normal);
            transform-origin: center;
        }
        .nav-hamburger.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        .nav-mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background-color: #111111;
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-normal);
        }
        .nav-mobile-overlay.active {
            display: flex;
            opacity: 1;
            pointer-events: auto;
        }
        .nav-mobile-overlay a {
            font-size: 20px;
            font-weight: 600;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            width: 180px;
            text-align: center;
            transition: color var(--transition-fast);
        }
        .nav-mobile-overlay a:hover {
            color: var(--accent);
        }

        /* ============ HERO ============ */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            padding-top: var(--nav-height);
            padding-bottom: 40px;
        }
        .hero-content {
            max-width: 680px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 85, 0, 0.2);
            border: 1px solid rgba(255, 85, 0, 0.35);
            color: #FFAA77;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.6px;
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            margin-bottom: 24px;
            text-transform: uppercase;
        }
        .hero-title {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 56px;
            line-height: 1.1;
            color: #FFFFFF;
            letter-spacing: -1.2px;
            margin-bottom: 20px;
            text-shadow: 0px 4px 20px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 18px;
            line-height: 1.65;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            max-width: 520px;
            font-weight: 400;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 15px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            transition: all var(--transition-normal);
            white-space: nowrap;
            letter-spacing: 0.2px;
            cursor: pointer;
            text-align: center;
        }
        .btn-primary {
            background-color: var(--accent);
            color: #FFFFFF;
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background-color: var(--accent-hover);
            box-shadow: var(--shadow-btn-hover);
            transform: scale(1.03);
            color: #FFFFFF;
        }
        .btn-outline {
            background-color: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(255, 255, 255, 0.7);
        }
        .btn-outline:hover {
            border-color: #FFFFFF;
            background-color: rgba(255, 255, 255, 0.06);
            transform: scale(1.03);
            color: #FFFFFF;
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
            border-radius: var(--radius-sm);
        }

        /* ============ SECTIONS ============ */
        .section {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }
        .section-alt {
            background-color: var(--bg-secondary);
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: #FFFFFF;
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header h2 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 40px;
            line-height: 1.2;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-dark .section-header h2 {
            color: #FFFFFF;
        }
        .section-header .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 500px;
            margin: 0 auto;
        }
        .section-dark .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ============ SERVICES ============ */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .service-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
            cursor: default;
            display: flex;
            flex-direction: column;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 16px;
            right: 16px;
            height: 3px;
            background-color: transparent;
            border-radius: 0 0 3px 3px;
            transition: background-color var(--transition-normal);
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            background-color: #FAFAFA;
        }
        .service-card:hover::before {
            background-color: var(--accent);
        }
        .service-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background-color: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 22px;
            color: var(--accent);
            flex-shrink: 0;
            transition: all var(--transition-normal);
        }
        .service-card:hover .service-icon {
            background-color: rgba(255, 85, 0, 0.15);
            transform: scale(1.05);
        }
        .service-card h3 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 19px;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.2px;
        }
        .service-card p {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.55;
            flex-grow: 1;
        }

        /* ============ ADVANTAGES ============ */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .advantage-item {
            padding: 20px;
        }
        .advantage-number {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 64px;
            line-height: 1;
            color: #111111;
            letter-spacing: -1.5px;
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }
        .advantage-number .plus {
            color: var(--accent);
        }
        .advantage-label {
            font-size: 15px;
            color: #666666;
            font-weight: 500;
        }

        /* ============ CASES ============ */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .case-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 340px;
            background-size: cover;
            background-position: center;
            cursor: pointer;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-card);
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .case-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.7) 100%);
            z-index: 1;
            transition: background var(--transition-normal);
        }
        .case-card:hover::before {
            background: linear-gradient(180deg, rgba(0, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.78) 100%);
        }
        .case-card-content {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 2;
            padding: 32px 28px;
        }
        .case-tag {
            display: inline-block;
            background-color: var(--accent);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            padding: 5px 14px;
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            text-transform: uppercase;
        }
        .case-card-content h3 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 22px;
            color: #FFFFFF;
            letter-spacing: -0.3px;
            margin-bottom: 4px;
        }
        .case-card-content p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
        }
        .cases-scroll-wrapper {
            display: none;
        }

        /* ============ SOLUTIONS / PROCESS ============ */
        .process-steps {
            display: flex;
            align-items: flex-start;
            gap: 0;
            position: relative;
            justify-content: space-between;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 40px;
            right: 40px;
            height: 2px;
            background-color: #E5E5E5;
            z-index: 0;
        }
        .process-step {
            position: relative;
            z-index: 1;
            text-align: center;
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 0 12px;
        }
        .process-step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background-color: #FFFFFF;
            border: 3px solid #E5E5E5;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 22px;
            color: var(--text-primary);
            margin-bottom: 16px;
            transition: all var(--transition-normal);
            flex-shrink: 0;
            position: relative;
            z-index: 2;
        }
        .process-step.active .process-step-number {
            border-color: var(--accent);
            background-color: var(--accent);
            color: #FFFFFF;
            box-shadow: 0px 8px 24px rgba(255, 85, 0, 0.3);
        }
        .process-step h3 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 17px;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: -0.2px;
        }
        .process-step p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.45;
            max-width: 180px;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: 0px 2px 12px rgba(0, 0, 0, 0.03);
            overflow: hidden;
            transition: box-shadow var(--transition-normal);
            border: 1px solid transparent;
        }
        .faq-item.open {
            box-shadow: 0px 4px 20px rgba(0, 0, 0, 0.06);
            border-color: var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            user-select: none;
            gap: 16px;
            transition: background-color var(--transition-fast);
        }
        .faq-question:hover {
            background-color: #FAFAFA;
        }
        .faq-question h3 {
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            letter-spacing: -0.1px;
            flex: 1;
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: #F5F5F5;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-muted);
            transition: all var(--transition-normal);
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon {
            background-color: var(--accent);
            color: #FFFFFF;
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============ CONTACT / CTA ============ */
        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .contact-info h2 {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 36px;
            line-height: 1.2;
            color: #FFFFFF;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .contact-info p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.6;
        }
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-group {
            position: relative;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            background: transparent;
            border: none;
            border-bottom: 2px solid rgba(255, 255, 255, 0.25);
            padding: 14px 4px;
            font-size: 15px;
            color: #FFFFFF;
            transition: border-color var(--transition-fast);
            border-radius: 0;
        }
        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-bottom-color: var(--accent);
            outline: none;
        }
        .form-group textarea {
            min-height: 90px;
        }
        .btn-submit {
            background-color: var(--accent);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 15px;
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            align-self: flex-start;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-btn);
            letter-spacing: 0.2px;
            cursor: pointer;
        }
        .btn-submit:hover {
            background-color: var(--accent-hover);
            box-shadow: var(--shadow-btn-hover);
            transform: scale(1.03);
        }

        /* ============ FOOTER ============ */
        .footer {
            background-color: var(--bg-darker);
            padding: 48px 0;
            text-align: center;
        }
        .footer-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 22px;
            color: #FFFFFF;
            letter-spacing: -0.3px;
            margin-bottom: 16px;
            display: inline-block;
        }
        .footer-logo .logo-accent {
            color: var(--accent);
        }
        .footer-copy {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            margin-bottom: 8px;
        }
        .footer-back-top {
            display: inline-block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            cursor: pointer;
            transition: color var(--transition-fast);
            margin-top: 8px;
            font-weight: 500;
        }
        .footer-back-top:hover {
            color: var(--accent);
        }
        .footer-back-top i {
            margin-left: 4px;
            font-size: 11px;
        }

        /* ============ FADE UP ANIMATION ============ */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ============ BACK TO TOP FIXED ============ */
        .back-to-top-fixed {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--accent);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            z-index: 900;
            opacity: 0;
            pointer-events: none;
            transition: all var(--transition-normal);
            box-shadow: 0px 4px 16px rgba(255, 85, 0, 0.35);
            cursor: pointer;
            border: none;
        }
        .back-to-top-fixed.visible {
            opacity: 1;
            pointer-events: auto;
        }
        .back-to-top-fixed:hover {
            background-color: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0px 8px 24px rgba(255, 85, 0, 0.45);
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .cases-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .process-steps {
                flex-wrap: wrap;
                gap: 20px;
                justify-content: center;
            }
            .process-steps::before {
                display: none;
            }
            .process-step {
                flex: 0 0 auto;
                width: 160px;
            }
            .contact-wrapper {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-title {
                font-size: 44px;
            }
            .section-header h2 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 80px;
            }
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: flex;
            }
            .hero {
                min-height: 90vh;
            }
            .hero-title {
                font-size: 36px;
                letter-spacing: -0.6px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 12px;
            }
            .hero-buttons .btn {
                width: 100%;
                justify-content: center;
            }
            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .advantage-number {
                font-size: 48px;
            }
            .cases-grid {
                display: none;
            }
            .cases-scroll-wrapper {
                display: flex;
                overflow-x: auto;
                gap: 16px;
                scroll-snap-type: x mandatory;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 8px;
                scrollbar-width: none;
            }
            .cases-scroll-wrapper::-webkit-scrollbar {
                display: none;
            }
            .cases-scroll-wrapper .case-card {
                min-width: 280px;
                max-width: 320px;
                flex-shrink: 0;
                scroll-snap-align: start;
                min-height: 280px;
            }
            .process-steps {
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                position: relative;
                padding-left: 40px;
            }
            .process-steps::before {
                display: block;
                top: 0;
                bottom: 0;
                left: 26px;
                right: auto;
                width: 2px;
                height: auto;
                background-color: #E5E5E5;
            }
            .process-step {
                flex-direction: row;
                align-items: center;
                text-align: left;
                width: 100%;
                padding: 16px 0;
                gap: 16px;
            }
            .process-step-number {
                width: 44px;
                height: 44px;
                font-size: 18px;
                margin-bottom: 0;
                flex-shrink: 0;
            }
            .process-step h3 {
                font-size: 16px;
                margin-bottom: 2px;
            }
            .process-step p {
                max-width: none;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .contact-info h2 {
                font-size: 28px;
            }
            .btn-submit {
                width: 100%;
                justify-content: center;
                align-self: stretch;
            }
            .faq-question {
                padding: 16px 18px;
            }
            .faq-question h3 {
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 14px;
            }
            .footer {
                padding: 36px 0;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .advantages-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .advantage-number {
                font-size: 42px;
            }
            .service-card {
                padding: 24px 20px;
            }
            .case-card-content {
                padding: 20px 18px;
            }
            .case-card-content h3 {
                font-size: 18px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .back-to-top-fixed {
                bottom: 16px;
                right: 16px;
                width: 38px;
                height: 38px;
                font-size: 16px;
            }
        }