/* roulang page: index */
:root {
            --primary: #F04E30;
            --primary-light: #FF6B4A;
            --primary-gradient: linear-gradient(135deg, #F04E30 0%, #FF6B4A 100%);
            --secondary: #1A2B4C;
            --secondary-light: #243660;
            --bg: #F7F8FA;
            --card-bg: #FFFFFF;
            --card-bg-alt: #EEF0F5;
            --accent: #00E5FF;
            --text-primary: #1A2B4C;
            --text-body: #3D4F6B;
            --text-weak: rgba(26, 43, 76, 0.6);
            --text-white-weak: rgba(255, 255, 255, 0.7);
            --border-light: #E2E6ED;
            --border-subtle: #EEF0F5;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 12px rgba(26, 43, 76, 0.04);
            --shadow-card-hover: 0 12px 28px rgba(240, 78, 48, 0.12);
            --shadow-nav: 0 1px 0 rgba(26, 43, 76, 0.06);
            --ease-out-expo: cubic-bezier(0.2, 0, 0, 1);
            --transition-fast: 0.2s var(--ease-out-expo);
            --transition-smooth: 0.25s var(--ease-out-expo);
            --transition-slow: 0.35s var(--ease-out-expo);
            --container-max: 1280px;
            --section-gap: 80px;
            --section-gap-mobile: 60px;
            --nav-height: 72px;
        }

        *,
        *::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;
        }

        body {
            font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            font-weight: 400;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        input {
            font-family: inherit;
            outline: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            box-shadow: var(--shadow-nav);
            display: flex;
            align-items: center;
            transition: background var(--transition-fast);
        }

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

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--secondary);
            letter-spacing: 0.02em;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon svg {
            width: 100%;
            height: 100%;
        }

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

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-primary);
            position: relative;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }

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

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

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 2px 8px rgba(240, 78, 48, 0.25);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(240, 78, 48, 0.35);
            color: #fff;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            background: none;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--secondary);
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu a {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .mobile-menu a:hover {
            color: var(--primary);
        }
        .mobile-menu .mobile-cta {
            margin-top: 16px;
            padding: 14px 36px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            border-radius: var(--radius-sm);
            font-size: 1rem;
        }

        @media (max-width: 860px) {
            .nav-links,
            .nav-cta.desktop-only {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
        }

        @media (min-width: 861px) {
            .mobile-menu {
                display: none !important;
                opacity: 0 !important;
                pointer-events: none !important;
            }
            .hamburger {
                display: none;
            }
        }

        /* ========== HERO SECTION ========== */
        .hero-section {
            position: relative;
            padding: 60px 0 80px;
            overflow: hidden;
            background: var(--bg);
        }

        .hero-data-lines {
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0.35;
            z-index: 0;
        }

        .hero-data-lines::before {
            content: '';
            position: absolute;
            top: -10%;
            left: -5%;
            width: 200%;
            height: 120%;
            background: repeating-linear-gradient(0deg,
                    transparent,
                    transparent 39px,
                    rgba(0, 229, 255, 0.08) 39px,
                    rgba(0, 229, 255, 0.08) 40px),
                repeating-linear-gradient(90deg,
                    transparent,
                    transparent 59px,
                    rgba(240, 78, 48, 0.04) 59px,
                    rgba(240, 78, 48, 0.04) 60px);
            animation: dataFlow 28s linear infinite;
        }

        @keyframes dataFlow {
            0% {
                transform: translate(0, 0);
            }
            100% {
                transform: translate(-60px, -40px);
            }
        }

        .hero-section .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-text {
            max-width: 560px;
        }

        .hero-badge-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: rgba(0, 229, 255, 0.07);
            border: 1px solid rgba(0, 229, 255, 0.2);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--secondary);
            white-space: nowrap;
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.5);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(0, 229, 255, 0);
            }
        }

        .hero-title {
            font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
            font-weight: 800;
            font-size: clamp(2.25rem, 5vw, 3.5rem);
            line-height: 1.2;
            color: var(--secondary);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .hero-title .highlight {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 1.1rem;
            line-height: 1.6;
            color: var(--text-weak);
            margin-bottom: 24px;
            max-width: 440px;
        }

        .hero-stat-cards {
            display: flex;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .hero-stat-card {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--secondary);
            color: #fff;
            padding: 14px 20px;
            border-radius: var(--radius-md);
            min-width: 160px;
            flex-shrink: 0;
        }

        .hero-stat-card .stat-accent-line {
            width: 3px;
            height: 36px;
            background: var(--accent);
            border-radius: 2px;
            flex-shrink: 0;
        }

        .hero-stat-card .stat-value {
            font-family: 'Inter', 'Roboto', sans-serif;
            font-weight: 700;
            font-size: 1.6rem;
            line-height: 1;
            letter-spacing: -0.02em;
        }

        .hero-stat-card .stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 2px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: 0 4px 14px rgba(240, 78, 48, 0.3);
            white-space: nowrap;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(240, 78, 48, 0.4);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: #fff;
            color: var(--secondary);
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            border: 2px solid var(--secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }

        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual .glow-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(60px);
            opacity: 0.3;
            pointer-events: none;
        }

        .hero-visual .glow-orb.orb-orange {
            width: 180px;
            height: 180px;
            background: rgba(240, 78, 48, 0.35);
            top: 10%;
            right: 5%;
        }

        .hero-visual .glow-orb.orb-cyan {
            width: 140px;
            height: 140px;
            background: rgba(0, 229, 255, 0.25);
            bottom: 15%;
            left: 0;
        }

        .hero-visual img {
            position: relative;
            z-index: 1;
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 48px rgba(26, 43, 76, 0.12);
            max-width: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        @media (max-width: 860px) {
            .hero-section .container {
                grid-template-columns: 1fr;
                gap: 36px;
                text-align: center;
            }
            .hero-text {
                max-width: 100%;
                order: 1;
            }
            .hero-visual {
                order: 0;
                max-width: 400px;
                margin: 0 auto;
            }
            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-stat-cards {
                justify-content: center;
            }
            .hero-cta-group {
                justify-content: center;
            }
            .hero-badge-row {
                justify-content: center;
            }
            .hero-stat-card {
                min-width: auto;
            }
        }

        /* ========== STATS SECTION ========== */
        .stats-section {
            padding: 40px 0 var(--section-gap);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .stat-card-large {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 32px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .stat-card-large:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .stat-card-large .stat-progress-bar {
            position: absolute;
            bottom: 0;
            left: 0;
            height: 4px;
            width: 0;
            background: var(--primary-gradient);
            border-radius: 0 2px 0 0;
            transition: width 0.5s var(--ease-out-expo);
        }

        .stat-card-large:hover .stat-progress-bar {
            width: 100%;
        }

        .stat-card-large .stat-number {
            font-family: 'Inter', 'Roboto', sans-serif;
            font-weight: 700;
            font-size: 3.2rem;
            line-height: 1;
            color: var(--accent);
            letter-spacing: -0.03em;
            margin-bottom: 8px;
        }

        .stat-card-large .stat-label-text {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stat-card-large {
                padding: 24px;
            }
            .stat-card-large .stat-number {
                font-size: 2.6rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .stat-card-large {
                padding: 24px 16px;
            }
            .stat-card-large .stat-number {
                font-size: 2.4rem;
            }
        }

        /* ========== SERVICES SECTION ========== */
        .services-section {
            padding: var(--section-gap) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-label {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(240, 78, 48, 0.08);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .section-title {
            font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
            font-weight: 700;
            font-size: 2rem;
            line-height: 1.3;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-weak);
            max-width: 560px;
            margin: 0 auto;
        }

        .services-asymmetric {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: start;
        }

        .services-left-col {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .service-card-large {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .service-card-large:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .service-card-large .card-img-wrap {
            width: 100%;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #E8ECF2;
        }

        .service-card-large .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s var(--ease-out-expo);
        }

        .service-card-large:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .service-card-large .card-body {
            padding: 24px 28px 28px;
        }

        .service-card-large .card-body h3 {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--secondary);
            margin-bottom: 10px;
        }

        .service-card-large .card-body p {
            font-size: 0.9rem;
            color: var(--text-weak);
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .service-data-points {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .service-data-points li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-primary);
        }

        .service-data-points li .data-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }

        .services-right-col {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .service-mini-card {
            background: var(--card-bg-alt);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            border-left: 3px solid var(--primary);
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), background var(--transition-fast);
            box-shadow: var(--shadow-card);
        }

        .service-mini-card:nth-child(2) {
            background: var(--card-bg);
            border-left-color: var(--accent);
        }
        .service-mini-card:nth-child(3) {
            background: var(--card-bg-alt);
            border-left-color: var(--primary);
        }

        .service-mini-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .service-mini-card .mini-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 1.1rem;
            background: rgba(240, 78, 48, 0.08);
            color: var(--primary);
        }

        .service-mini-card:nth-child(2) .mini-icon {
            background: rgba(0, 229, 255, 0.1);
            color: #0099aa;
        }
        .service-mini-card:nth-child(3) .mini-icon {
            background: rgba(240, 78, 48, 0.08);
            color: var(--primary);
        }

        .service-mini-card .mini-text h4 {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--secondary);
            margin-bottom: 4px;
        }
        .service-mini-card .mini-text p {
            font-size: 0.82rem;
            color: var(--text-weak);
            line-height: 1.5;
        }

        @media (max-width: 860px) {
            .services-asymmetric {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .services-left-col {
                gap: 20px;
            }
            .services-right-col {
                gap: 14px;
            }
            .service-card-large .card-body {
                padding: 18px 20px 22px;
            }
            .service-mini-card {
                padding: 16px 18px;
            }
        }

        /* ========== CASES SECTION ========== */
        .cases-section {
            padding: var(--section-gap) 0;
            background: #EEF1F7;
            position: relative;
            overflow: hidden;
        }

        .cases-section .bg-texture {
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0.06;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            z-index: 0;
        }

        .cases-section .container {
            position: relative;
            z-index: 1;
        }

        .cases-compare {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 20px;
            align-items: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .case-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .case-card.dim {
            background: #F5F6F9;
            border: 1px solid #E2E6ED;
        }

        .case-card.bright {
            background: #fff;
            border: 2px solid var(--primary);
            position: relative;
        }

        .case-card.bright::before {
            content: '';
            position: absolute;
            top: -2px;
            left: 20px;
            right: 20px;
            height: 3px;
            background: var(--primary-gradient);
            border-radius: 0 0 4px 4px;
        }

        .case-card .case-label {
            font-weight: 700;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
            color: var(--text-weak);
        }

        .case-card.bright .case-label {
            color: var(--primary);
        }

        .case-card .case-metric {
            display: flex;
            align-items: baseline;
            gap: 6px;
            font-family: 'Inter', 'Roboto', sans-serif;
            font-weight: 700;
            font-size: 2.4rem;
            color: var(--text-weak);
            line-height: 1;
            margin-bottom: 6px;
        }

        .case-card.bright .case-metric {
            color: var(--accent);
            font-size: 2.8rem;
        }

        .case-card .case-metric .delta {
            font-size: 1rem;
            font-weight: 600;
            color: #22c55e;
            background: rgba(34, 197, 94, 0.1);
            padding: 3px 8px;
            border-radius: 4px;
        }

        .case-card .case-detail {
            font-size: 0.85rem;
            color: var(--text-weak);
            line-height: 1.5;
            list-style: none;
        }

        .case-card .case-detail li {
            padding: 3px 0;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .case-card .case-detail li::before {
            content: '•';
            color: #ccc;
        }

        .case-card.bright .case-detail li::before {
            color: var(--primary);
        }

        .case-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            background: var(--primary-gradient);
            border-radius: 50%;
            color: #fff;
            font-size: 1.4rem;
            box-shadow: 0 6px 20px rgba(240, 78, 48, 0.3);
            z-index: 2;
        }

        @media (max-width: 768px) {
            .cases-compare {
                grid-template-columns: 1fr;
                gap: 16px;
                max-width: 100%;
            }
            .case-divider {
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
                margin: 0 auto;
                transform: rotate(90deg);
            }
            .case-card {
                padding: 20px 22px;
            }
            .case-card .case-metric {
                font-size: 2rem;
            }
            .case-card.bright .case-metric {
                font-size: 2.2rem;
            }
        }

        /* ========== FAQ SECTION ========== */
        .faq-section {
            padding: var(--section-gap) 0;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition-fast);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--secondary);
            gap: 16px;
            user-select: none;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #EEF1F7;
            transition: all var(--transition-smooth);
            font-size: 0.75rem;
            color: var(--text-weak);
        }

        .faq-item.open .faq-question .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s var(--ease-out-expo), padding 0.4s var(--ease-out-expo);
            padding: 0 8px;
            background: #FAFBFC;
            border-left: 3px solid transparent;
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 14px 16px 20px;
            border-left-color: var(--primary);
        }

        @media (max-width: 520px) {
            .faq-question {
                font-size: 0.95rem;
                padding: 14px 4px;
            }
            .faq-answer {
                font-size: 0.85rem;
            }
            .faq-item.open .faq-answer {
                padding: 10px 12px 16px;
            }
        }

        /* ========== CONTACT / CTA SECTION ========== */
        .contact-section {
            padding: var(--section-gap) 0;
            background: var(--primary-gradient);
            position: relative;
            overflow: hidden;
        }

        .contact-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 80%, rgba(0, 229, 255, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 75% 20%, rgba(255, 255, 255, 0.06) 0%, transparent 40%);
            pointer-events: none;
        }

        .contact-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .contact-title {
            font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
            font-weight: 700;
            font-size: 2rem;
            color: #fff;
            margin-bottom: 10px;
        }

        .contact-subtitle {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        .contact-form-row {
            display: flex;
            gap: 12px;
            max-width: 620px;
            margin: 0 auto 20px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .contact-form-row input {
            flex: 1;
            min-width: 160px;
            padding: 14px 18px;
            background: #fff;
            border: none;
            border-bottom: 2px solid transparent;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            color: var(--text-primary);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .contact-form-row input:focus {
            border-bottom-color: var(--accent);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            outline: none;
        }

        .contact-form-row input::placeholder {
            color: #b0b8c4;
        }

        .btn-submit {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 40px;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 14px rgba(26, 43, 76, 0.3);
        }

        .btn-submit:hover {
            background: #243660;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(26, 43, 76, 0.4);
        }

        .contact-trust {
            margin-top: 16px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.65);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .contact-trust .trust-icon {
            font-size: 1rem;
        }

        @media (max-width: 520px) {
            .contact-form-row {
                flex-direction: column;
                gap: 10px;
            }
            .contact-form-row input {
                flex: none;
                width: 100%;
            }
            .contact-title {
                font-size: 1.6rem;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--secondary);
            color: #fff;
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.15rem;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
            max-width: 240px;
        }

        .footer-col h4 {
            font-weight: 600;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }

        .footer-col ul a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== GLOBAL 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: 0;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }