/* roulang page: index */
:root {
            --bg-deep: #06060f;
            --bg-primary: #0a0a1a;
            --bg-secondary: #0f0f24;
            --bg-card: #111130;
            --bg-card-hover: #161640;
            --border-subtle: #1e1e45;
            --border-glow: #3d2d8a;
            --text-primary: #e8e8f0;
            --text-secondary: #b0b0c8;
            --text-weak: #7a7a9e;
            --accent-purple: #8b5cf6;
            --accent-purple-glow: #a78bfa;
            --accent-blue: #3b82f6;
            --accent-cyan: #22d3ee;
            --accent-pink: #ec4899;
            --accent-green: #10b981;
            --gradient-hero: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 40%, #22d3ee 100%);
            --gradient-card: linear-gradient(180deg, rgba(139, 92, 246, 0.08) 0%, rgba(34, 211, 238, 0.03) 100%);
            --gradient-btn: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
            --gradient-btn-hover: linear-gradient(135deg, #9b6cf7 0%, #7376f2 100%);
            --shadow-glow-purple: 0 0 30px rgba(139, 92, 246, 0.35), 0 0 60px rgba(139, 92, 246, 0.12);
            --shadow-glow-cyan: 0 0 25px rgba(34, 211, 238, 0.3), 0 0 50px rgba(34, 211, 238, 0.1);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 8px 40px rgba(139, 92, 246, 0.25), 0 2px 12px rgba(0, 0, 0, 0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1240px;
            --nav-height: 68px;
            --section-gap: 90px;
            --section-gap-mobile: 56px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse at 30% 15%, rgba(139, 92, 246, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(34, 211, 238, 0.04) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 50%, rgba(59, 130, 246, 0.03) 0%, transparent 70%);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-purple-glow);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2vw, 1.5rem);
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 10, 26, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(10, 10, 26, 0.94);
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
            border-bottom-color: var(--border-glow);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            z-index: 1001;
        }
        .logo-link:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--gradient-hero);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: var(--shadow-glow-purple);
            flex-shrink: 0;
        }
        .logo-text {
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(139, 92, 246, 0.12);
        }
        .nav-links a.nav-cta {
            background: var(--gradient-btn);
            color: #fff;
            padding: 9px 22px;
            font-weight: 600;
            box-shadow: 0 4px 18px rgba(139, 92, 246, 0.3);
            margin-left: 8px;
        }
        .nav-links a.nav-cta:hover {
            background: var(--gradient-btn-hover);
            box-shadow: 0 6px 24px rgba(139, 92, 246, 0.45);
            color: #fff;
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
            padding: 8px;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 3px;
            transition: all var(--transition-fast);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 860px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                flex-direction: column;
                background: rgba(15, 15, 36, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 90px 28px 40px;
                gap: 4px;
                transition: right var(--transition-smooth);
                border-left: 1px solid var(--border-subtle);
                align-items: stretch;
                box-shadow: -8px 0 40px rgba(0, 0, 0, 0.6);
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                padding: 12px 18px;
                border-radius: var(--radius-md);
                font-size: 1rem;
                text-align: left;
            }
            .nav-links a.nav-cta {
                margin-left: 0;
                text-align: center;
                margin-top: 12px;
            }
            .header-inner {
                padding: 0 18px;
            }
        }

        /* Mobile overlay */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 999;
            transition: opacity var(--transition-smooth);
        }
        .nav-overlay.show {
            display: block;
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--nav-height);
            overflow: hidden;
            background-color: var(--bg-primary);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.45;
            filter: saturate(1.2) brightness(0.7);
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(6, 6, 15, 0.5) 0%, rgba(10, 10, 26, 0.8) 60%, var(--bg-deep) 100%);
        }
        .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            overflow: hidden;
        }
        .hero-particle {
            position: absolute;
            width: 2px;
            height: 2px;
            background: #fff;
            border-radius: 50%;
            animation: floatUp 6s infinite ease-in;
            opacity: 0;
        }
        @keyframes floatUp {
            0% {
                transform: translateY(100vh) scale(0);
                opacity: 0;
            }
            15% {
                opacity: 0.8;
            }
            40% {
                opacity: 0.5;
            }
            100% {
                transform: translateY(-10vh) scale(1.5);
                opacity: 0;
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: 40px 0 60px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(139, 92, 246, 0.15);
            border: 1px solid rgba(139, 92, 246, 0.35);
            border-radius: var(--radius-full);
            padding: 7px 18px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--accent-purple-glow);
            margin-bottom: 22px;
            animation: pulseBadge 2.5s ease-in-out infinite;
        }
        @keyframes pulseBadge {
            0%,
            100% {
                box-shadow: 0 0 12px rgba(139, 92, 246, 0.2);
            }
            50% {
                box-shadow: 0 0 28px rgba(139, 92, 246, 0.45);
            }
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-green);
            animation: dotBlink 1.2s ease-in-out infinite;
        }
        @keyframes dotBlink {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        .hero h1 {
            font-size: clamp(2.4rem, 5.5vw, 4.2rem);
            font-weight: 900;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            line-height: 1.1;
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: none;
            filter: drop-shadow(0 0 18px rgba(139, 92, 246, 0.4));
        }
        .hero-subtitle {
            font-size: clamp(1.05rem, 1.6vw, 1.25rem);
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 580px;
            line-height: 1.6;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            cursor: pointer;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--gradient-btn);
            color: #fff;
            box-shadow: 0 6px 28px rgba(139, 92, 246, 0.35);
        }
        .btn-primary:hover {
            background: var(--gradient-btn-hover);
            box-shadow: 0 10px 36px rgba(139, 92, 246, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            border: 2px solid var(--border-glow);
            color: var(--text-primary);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--accent-purple);
            background: rgba(139, 92, 246, 0.08);
            color: var(--accent-purple-glow);
            box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border-subtle);
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat .stat-num {
            font-size: 2rem;
            font-weight: 800;
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
        }
        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: var(--text-weak);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: auto;
                padding-top: calc(var(--nav-height) + 30px);
                padding-bottom: 40px;
            }
            .hero-stats-row {
                gap: 20px;
                margin-top: 28px;
                padding-top: 20px;
            }
            .hero-stat .stat-num {
                font-size: 1.5rem;
            }
            .hero-btns {
                flex-direction: column;
                gap: 10px;
            }
            .btn {
                justify-content: center;
                text-align: center;
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--section-gap-mobile) 0;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-purple-glow);
            margin-bottom: 10px;
            background: rgba(139, 92, 246, 0.1);
            padding: 5px 14px;
            border-radius: var(--radius-full);
        }
        .section-header h2 {
            margin-bottom: 10px;
        }
        .section-header .section-desc {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
            font-size: 1.02rem;
        }

        /* ========== FEATURES ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-hero);
            opacity: 0;
            transition: opacity var(--transition-smooth);
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            background: var(--gradient-card);
            color: var(--accent-purple-glow);
            border: 1px solid rgba(139, 92, 246, 0.2);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
        }

        /* ========== SERVICES ========== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 26px;
        }
        @media (max-width: 768px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
        }
        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .service-card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-subtle);
        }
        .service-card-body {
            padding: 22px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card-body h3 {
            margin-bottom: 8px;
        }
        .service-card-body p {
            color: var(--text-secondary);
            font-size: 0.93rem;
            margin-bottom: 16px;
            flex: 1;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: auto;
        }
        .tag {
            display: inline-block;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(139, 92, 246, 0.1);
            color: var(--accent-purple-glow);
            border: 1px solid rgba(139, 92, 246, 0.2);
        }
        .tag.blue {
            background: rgba(59, 130, 246, 0.1);
            color: #60a5fa;
            border-color: rgba(59, 130, 246, 0.2);
        }
        .tag.cyan {
            background: rgba(34, 211, 238, 0.1);
            color: #67e8f9;
            border-color: rgba(34, 211, 238, 0.2);
        }
        .tag.pink {
            background: rgba(236, 72, 153, 0.1);
            color: #f472b6;
            border-color: rgba(236, 72, 153, 0.2);
        }

        /* ========== STATS STRIP ========== */
        .stats-strip {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            padding: 50px 0;
            position: relative;
        }
        .stats-strip::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .stat-block .stat-value {
            font-size: 2.8rem;
            font-weight: 900;
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-block .stat-desc {
            color: var(--text-weak);
            font-size: 0.9rem;
        }

        /* ========== PROCESS ========== */
        .process-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 700px;
            margin: 0 auto;
            position: relative;
        }
        .process-list::before {
            content: '';
            position: absolute;
            left: 27px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--accent-purple), var(--accent-cyan), transparent);
            border-radius: 1px;
        }
        @media (max-width: 520px) {
            .process-list::before {
                left: 20px;
            }
        }
        .process-item {
            display: flex;
            gap: 24px;
            padding: 20px 0 28px;
            position: relative;
            align-items: flex-start;
        }
        .process-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            flex-shrink: 0;
            z-index: 1;
            color: var(--accent-purple-glow);
            transition: all var(--transition-smooth);
            box-shadow: 0 0 0 0 rgba(139, 92, 246, 0);
        }
        .process-item:hover .process-num {
            border-color: var(--accent-purple);
            box-shadow: 0 0 28px rgba(139, 92, 246, 0.4);
            background: var(--bg-card-hover);
        }
        .process-body h3 {
            margin-bottom: 4px;
            font-size: 1.15rem;
        }
        .process-body p {
            color: var(--text-secondary);
            font-size: 0.93rem;
        }
        @media (max-width: 520px) {
            .process-num {
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
            .process-list::before {
                left: 20px;
            }
            .process-item {
                gap: 16px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-purple-glow);
        }
        .faq-icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(139, 92, 246, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-smooth);
            font-size: 0.7rem;
            color: var(--accent-purple-glow);
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: rgba(139, 92, 246, 0.25);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
            background: rgba(0, 0, 0, 0.2);
        }
        .faq-item.open .faq-answer {
            max-height: 220px;
            padding: 0 22px 18px;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            overflow: hidden;
            margin: 0 28px;
            text-align: center;
            padding: 60px 40px;
            border: 1px solid var(--border-subtle);
        }
        @media (max-width: 768px) {
            .cta-section {
                margin: 0 12px;
                padding: 40px 20px;
                border-radius: var(--radius-lg);
            }
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-content h2 {
            margin-bottom: 12px;
        }
        .cta-content p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 1.05rem;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border-radius: var(--radius-full);
            background: var(--bg-card);
            border: 2px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: border-color var(--transition-fast);
        }
        .cta-form input:focus {
            border-color: var(--accent-purple);
            box-shadow: 0 0 18px rgba(139, 92, 246, 0.2);
        }
        .cta-form input::placeholder {
            color: var(--text-weak);
        }
        .cta-form .btn {
            flex-shrink: 0;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 30px;
            margin-top: var(--section-gap);
        }
        @media (max-width: 768px) {
            .site-footer {
                margin-top: var(--section-gap-mobile);
                padding: 36px 0 24px;
            }
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .footer-brand .logo-link {
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        .footer-brand p {
            color: var(--text-weak);
            font-size: 0.88rem;
            line-height: 1.6;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            color: var(--text-weak);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-purple-glow);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 22px;
            text-align: center;
            color: var(--text-weak);
            font-size: 0.82rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .footer-bottom span {
            white-space: nowrap;
        }

        /* ========== UTILITY ========== */
        .text-gradient {
            background: var(--gradient-hero);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .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 (max-width: 520px) {
            .hide-mobile {
                display: none !important;
            }
        }