/* roulang page: index */
:root {
            --blue-600: #2563EB;
            --blue-700: #1D4ED8;
            --orange-500: #F97316;
            --orange-600: #EA580C;
            --text-primary: #1E293B;
            --text-secondary: #64748B;
            --bg-light: #F8FAFC;
            --white: #FFFFFF;
            --border-light: #CBD5E1;
            --footer-bg: #0F172A;
            --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.12), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --transition-base: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --section-gap-desktop: 100px;
            --section-gap-mobile: 60px;
            --card-gap: 24px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-width: 320px;
        }

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

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }

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

        @media (max-width: 480px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ============ NAVIGATION ============ */
        #nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--white);
            height: 72px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        #nav.scrolled {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }

        #nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
        }

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

        .nav-links a {
            font-size: 16px;
            color: var(--text-primary);
            position: relative;
            padding: 4px 0;
            font-weight: 500;
            white-space: nowrap;
            transition: color var(--transition-base);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--blue-600);
            border-radius: 1px;
            transition: width var(--transition-base);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--blue-600);
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--orange-500);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 10px 22px;
            border-radius: 50px;
            white-space: nowrap;
            flex-shrink: 0;
            cursor: pointer;
            border: none;
            transition: background var(--transition-base), box-shadow var(--transition-base);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
            text-decoration: none;
        }

        .nav-cta:hover {
            background: var(--orange-600);
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.4);
            color: #fff;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            flex-shrink: 0;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            margin: 6px 0;
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(255, 255, 255, 0.98);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 24px;
                transform: translateY(-100%);
                transition: transform 0.35s ease;
                z-index: 999;
                padding-top: 80px;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links a {
                font-size: 20px;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .nav-cta.mobile-cta {
                display: inline-flex;
                margin-top: 16px;
            }
        }

        @media (min-width: 769px) {
            .nav-cta.mobile-cta {
                display: none;
            }
            .nav-cta.desktop-only {
                display: inline-flex;
            }
        }

        @media (max-width: 480px) {
            #nav {
                height: 60px;
            }
            .nav-logo {
                font-size: 18px;
            }
            .nav-logo .logo-icon {
                width: 28px;
                height: 28px;
            }
            html {
                scroll-padding-top: 68px;
            }
        }

        /* ============ HERO ============ */
        #hero {
            padding-top: 120px;
            padding-bottom: 80px;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: var(--white);
            position: relative;
            overflow: hidden;
        }

        #hero .container {
            display: flex;
            align-items: center;
            gap: 48px;
            width: 100%;
        }

        .hero-left {
            flex: 0 0 55%;
            max-width: 55%;
        }

        .hero-right {
            flex: 0 0 42%;
            max-width: 42%;
            position: relative;
        }

        .hero-h1 {
            font-size: 52px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 20px;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
            position: relative;
        }

        .hero-h1 .accent-bar {
            display: inline-block;
            width: 60px;
            height: 4px;
            background: var(--orange-500);
            border-radius: 2px;
            vertical-align: middle;
            margin-right: 12px;
            position: relative;
            top: -8px;
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 500px;
            margin-bottom: 32px;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 16px;
            padding: 13px 30px;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all var(--transition-base);
            border: 2px solid transparent;
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .btn-primary {
            background: var(--blue-600);
            color: #fff;
            border-color: var(--blue-600);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }
        .btn-primary:hover {
            background: var(--blue-700);
            border-color: var(--blue-700);
            box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: var(--blue-600);
            border-color: var(--blue-600);
        }
        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.06);
            transform: translateY(-2px);
            color: var(--blue-600);
        }

        .btn-orange {
            background: var(--orange-500);
            color: #fff;
            border-color: var(--orange-500);
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
        }
        .btn-orange:hover {
            background: var(--orange-600);
            border-color: var(--orange-600);
            box-shadow: 0 6px 18px rgba(249, 115, 22, 0.4);
            transform: translateY(-2px);
            color: #fff;
        }

        .hero-image-wrapper {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            aspect-ratio: 16 / 9;
        }

        .hero-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .hero-image-overlay {
            position: absolute;
            inset: 0;
            background: rgba(37, 99, 235, 0.08);
            pointer-events: none;
            z-index: 1;
        }

        .hero-geo-shape {
            position: absolute;
            pointer-events: none;
            z-index: 2;
            opacity: 0.35;
        }
        .hero-geo-shape.shape-1 {
            top: -20px;
            right: -30px;
            width: 120px;
            height: 120px;
            background: rgba(37, 99, 235, 0.12);
            clip-path: polygon(60% 0, 100% 40%, 80% 100%, 0 70%, 10% 20%);
            transform: rotate(15deg);
        }
        .hero-geo-shape.shape-2 {
            bottom: -25px;
            left: -20px;
            width: 90px;
            height: 90px;
            background: rgba(249, 115, 22, 0.1);
            clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
            transform: rotate(25deg);
        }

        @media (max-width: 1024px) {
            #hero .container {
                flex-direction: column;
                gap: 36px;
            }
            .hero-left,
            .hero-right {
                flex: 1 1 auto;
                max-width: 100%;
            }
            .hero-h1 {
                font-size: 40px;
            }
            .hero-subtitle {
                font-size: 16px;
                max-width: 100%;
            }
            #hero {
                padding-top: 100px;
                padding-bottom: 60px;
                min-height: auto;
            }
        }

        @media (max-width: 480px) {
            .hero-h1 {
                font-size: 30px;
            }
            .hero-h1 .accent-bar {
                width: 36px;
                height: 3px;
                margin-right: 8px;
                top: -5px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 12px;
            }
            .btn {
                width: 100%;
                text-align: center;
                padding: 12px 20px;
                font-size: 15px;
            }
            #hero {
                padding-top: 80px;
                padding-bottom: 40px;
            }
            .hero-geo-shape.shape-1 {
                width: 70px;
                height: 70px;
                top: -10px;
                right: -15px;
            }
            .hero-geo-shape.shape-2 {
                width: 55px;
                height: 55px;
                bottom: -12px;
                left: -10px;
            }
        }

        /* ============ FEATURES ============ */
        #features {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
            background: var(--white);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            text-align: center;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }

        .feature-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--card-shadow);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            border-left: 3px solid transparent;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
            border-left-color: var(--blue-600);
        }

        .feature-icon-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            flex-shrink: 0;
        }
        .feature-icon-circle.blue-bg {
            background: #EBF0FF;
            color: var(--blue-600);
        }
        .feature-icon-circle.orange-bg {
            background: #FFF4ED;
            color: var(--orange-500);
        }
        .feature-icon-circle svg {
            width: 26px;
            height: 26px;
        }

        .feature-card h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }
            #features {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .feature-card {
                padding: 22px 18px;
            }
            .feature-card h3 {
                font-size: 19px;
            }
        }

        /* ============ CASES ============ */
        #cases {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
            background: var(--bg-light);
        }

        .cases-masonry {
            columns: 3;
            column-gap: var(--card-gap);
            break-inside: avoid;
        }

        .case-card {
            break-inside: avoid;
            margin-bottom: var(--card-gap);
            border-radius: var(--radius-card);
            overflow: hidden;
            position: relative;
            cursor: pointer;
            box-shadow: var(--card-shadow);
            transition: all var(--transition-base);
            background: #ddd;
            display: block;
            text-decoration: none;
            color: #fff;
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }
        .case-card img {
            width: 100%;
            display: block;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-card:hover img {
            transform: scale(1.04);
        }
        .case-card .case-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0.1) 50%, rgba(0, 0, 0, 0) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 20px;
            z-index: 1;
        }
        .case-card .case-tag {
            display: inline-block;
            background: var(--orange-500);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            margin-bottom: 8px;
            width: fit-content;
            letter-spacing: 0.03em;
        }
        .case-card .case-title {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            line-height: 1.4;
            transition: transform var(--transition-base);
        }
        .case-card .case-desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.5;
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), margin-top var(--transition-base);
        }
        .case-card:hover .case-desc {
            max-height: 50px;
            margin-top: 6px;
        }
        .case-card:hover .case-title {
            transform: translateY(-2px);
        }

        .case-card.tall {
            /* naturally taller via image aspect ratio */;
        }

        @media (max-width: 1024px) {
            .cases-masonry {
                columns: 2;
            }
        }
        @media (max-width: 480px) {
            .cases-masonry {
                columns: 1;
            }
            #cases {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .case-card .case-title {
                font-size: 16px;
            }
        }

        /* ============ COMPARISON ============ */
        #comparison {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
            background: var(--white);
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
            align-items: stretch;
        }

        .comparison-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            box-shadow: var(--card-shadow);
            border: 2px solid transparent;
            position: relative;
            display: flex;
            flex-direction: column;
            transition: all var(--transition-base);
        }
        .comparison-card.featured {
            border-color: var(--blue-600);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.12);
        }
        .comparison-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }

        .comparison-badge {
            position: absolute;
            top: -14px;
            right: 20px;
            background: var(--orange-500);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 20px;
            letter-spacing: 0.04em;
            z-index: 1;
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.35);
        }

        .comparison-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            text-align: center;
        }
        .comparison-card .comparison-price {
            text-align: center;
            font-size: 20px;
            font-weight: 600;
            color: var(--blue-600);
            margin-bottom: 24px;
            letter-spacing: 0.03em;
        }
        .comparison-card .comparison-list {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            flex-grow: 1;
        }
        .comparison-card .comparison-list li {
            padding: 10px 0;
            border-bottom: 1px solid #f1f5f9;
            font-size: 14px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            line-height: 1.5;
        }
        .comparison-card .comparison-list li .check-icon {
            color: var(--blue-600);
            flex-shrink: 0;
            font-weight: 700;
            font-size: 16px;
        }
        .comparison-card .comparison-list li .minus-icon {
            color: #cbd5e1;
            flex-shrink: 0;
            font-weight: 700;
            font-size: 16px;
        }
        .comparison-card .btn-wrap {
            text-align: center;
            margin-top: auto;
        }
        .comparison-card .btn-wrap .btn {
            width: 100%;
        }

        @media (max-width: 1024px) {
            .comparison-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .comparison-card {
                padding: 24px 16px;
            }
            .comparison-card h3 {
                font-size: 20px;
            }
            .comparison-card .comparison-price {
                font-size: 17px;
            }
        }
        @media (max-width: 768px) {
            .comparison-grid {
                grid-template-columns: 1fr;
                max-width: 450px;
                margin: 0 auto;
            }
            .comparison-card.featured {
                border-color: transparent;
                border-top: 4px solid var(--blue-600);
                box-shadow: var(--card-shadow);
            }
        }
        @media (max-width: 480px) {
            #comparison {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .comparison-badge {
                font-size: 12px;
                padding: 4px 12px;
                top: -12px;
                right: 12px;
            }
        }

        /* ============ FAQ ============ */
        #faq {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
            background: var(--bg-light);
        }

        .faq-wrapper {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }
        .faq-left {
            flex: 0 0 320px;
        }
        .faq-left h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .faq-left p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .faq-right {
            flex: 1;
            min-width: 0;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item.open {
            box-shadow: var(--card-shadow);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            cursor: pointer;
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            line-height: 1.5;
            transition: color var(--transition-base);
        }
        .faq-question:hover {
            color: var(--blue-600);
        }
        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: #EBF0FF;
            color: var(--blue-600);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 18px;
            font-weight: 700;
            transition: all var(--transition-base);
            line-height: 1;
        }
        .faq-item.open .faq-icon {
            background: var(--blue-600);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: #F0F4FF;
            padding: 0 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 16px 20px;
        }

        @media (max-width: 768px) {
            .faq-wrapper {
                flex-direction: column;
                gap: 28px;
            }
            .faq-left {
                flex: auto;
            }
            .faq-left h2 {
                font-size: 26px;
            }
        }
        @media (max-width: 480px) {
            #faq {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 16px;
            }
            .faq-icon {
                width: 28px;
                height: 28px;
                font-size: 16px;
            }
            .faq-item.open .faq-answer {
                padding: 12px 16px;
            }
        }

        /* ============ CONTACT ============ */
        #contact {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
            background: linear-gradient(135deg, #ffffff 0%, #eef2ff 100%);
        }

        .contact-wrapper {
            display: flex;
            gap: 40px;
            align-items: stretch;
        }
        .contact-form-card {
            flex: 1;
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 36px 30px;
            box-shadow: var(--card-shadow);
            min-width: 0;
        }
        .contact-form-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .contact-form-card .form-subtitle {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            font-size: 15px;
            color: var(--text-primary);
            background: #fff;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
            outline: none;
            resize: vertical;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--blue-600);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
        }
        .form-group textarea {
            min-height: 100px;
        }
        .form-submit-btn {
            width: 100%;
            padding: 14px;
            font-size: 16px;
            font-weight: 600;
            background: var(--orange-500);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all var(--transition-base);
            letter-spacing: 0.03em;
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
        }
        .form-submit-btn:hover {
            background: var(--orange-600);
            box-shadow: 0 6px 18px rgba(249, 115, 22, 0.35);
            transform: translateY(-2px);
        }

        .contact-info-side {
            flex: 0 0 340px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }
        .contact-info-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #EBF0FF;
            color: var(--blue-600);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 18px;
        }
        .contact-info-item .info-text strong {
            display: block;
            font-size: 15px;
            color: var(--text-primary);
            margin-bottom: 2px;
        }
        .contact-info-item .info-text span {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .contact-decor-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            margin-top: auto;
        }
        .contact-decor-image img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        @media (max-width: 768px) {
            .contact-wrapper {
                flex-direction: column;
                gap: 28px;
            }
            .contact-info-side {
                flex: auto;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 16px;
            }
            .contact-decor-image {
                width: 100%;
                margin-top: 0;
            }
        }
        @media (max-width: 480px) {
            #contact {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .contact-form-card {
                padding: 24px 16px;
            }
            .contact-form-card h3 {
                font-size: 20px;
            }
            .contact-info-side {
                flex-direction: column;
            }
            .contact-decor-image {
                aspect-ratio: 16/9;
            }
        }

        /* ============ FOOTER ============ */
        #footer {
            background: var(--footer-bg);
            color: #cbd5e1;
            padding-top: 56px;
            padding-bottom: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            color: #94a3b8;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #94a3b8;
            transition: color var(--transition-base);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-logo-text .logo-icon-sm {
            width: 28px;
            height: 28px;
            color: var(--blue-600);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #64748b;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-col:first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            #footer {
                padding-top: 40px;
            }
        }

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