/* roulang page: index */
:root {
            --primary: #8B2CF5;
            --primary-deep: #7A1FE0;
            --primary-glow: rgba(139, 44, 245, 0.35);
            --secondary: #00E5FF;
            --secondary-glow: rgba(0, 229, 255, 0.25);
            --accent: #FF5E13;
            --accent-glow: rgba(255, 94, 19, 0.4);
            --bg-base: #0A0A0F;
            --bg-surface: #12121A;
            --bg-elevated: #1A1A24;
            --bg-footer: #06060C;
            --text-primary: #F0F0F5;
            --text-secondary: #9A9AA8;
            --text-muted: #6B6B7B;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-card: rgba(255, 255, 255, 0.08);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-pill: 50px;
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-card-hover: 0 8px 32px rgba(139, 44, 245, 0.25);
            --shadow-nav: 0 2px 24px rgba(0, 0, 0, 0.5);
            --shadow-cta-hover: 0 4px 20px rgba(255, 94, 19, 0.4);
            --shadow-case-hover: 0 12px 40px rgba(139, 44, 245, 0.3);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Menlo', monospace;
            --container-max: 1200px;
            --section-gap-desktop: 120px;
            --section-gap-tablet: 80px;
            --section-gap-mobile: 60px;
            --nav-height: 68px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-base);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

        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;
            transition: all var(--transition-fast);
        }
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 3px;
            border-radius: var(--radius-md);
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== NAVIGATION ========== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth), backdrop-filter var(--transition-smooth);
            background: transparent;
            backdrop-filter: blur(0px);
            -webkit-backdrop-filter: blur(0px);
            border-bottom: 1px solid transparent;
        }
        #header.scrolled {
            background: rgba(26, 26, 36, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid rgba(139, 44, 245, 0.18);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            white-space: nowrap;
            z-index: 1002;
        }
        .nav-logo .logo-icon {
            color: var(--secondary);
            font-size: 1.35rem;
            animation: logoPulse 2.4s ease-in-out infinite;
        }
        @keyframes logoPulse {
            0%,
            100% {
                text-shadow: 0 0 8px var(--secondary-glow);
            }
            50% {
                text-shadow: 0 0 20px var(--secondary), 0 0 32px var(--secondary-glow);
            }
        }
        .nav-logo .logo-text {
            letter-spacing: 0.02em;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.9rem;
            font-weight: 500;
            color: #c4c4d0;
            position: relative;
            padding: 6px 0;
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: width var(--transition-smooth);
        }
        .nav-links a:hover {
            color: var(--secondary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1.5px solid var(--secondary);
            color: var(--secondary);
            background: transparent;
            white-space: nowrap;
            transition: all var(--transition-fast);
            z-index: 1002;
        }
        .nav-cta:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 0 18px var(--secondary-glow);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            z-index: 1002;
            padding: 8px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 2px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }
        .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 nav overlay */
        .mobile-nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(10, 10, 15, 0.97);
            z-index: 1001;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .mobile-nav-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-overlay a {
            font-size: 1.25rem;
            font-weight: 600;
            color: #d0d0dc;
            letter-spacing: 0.04em;
            transition: color var(--transition-fast);
        }
        .mobile-nav-overlay a:hover {
            color: var(--secondary);
        }
        .mobile-nav-overlay .mobile-cta {
            margin-top: 16px;
            padding: 14px 36px;
            border-radius: var(--radius-pill);
            font-size: 1rem;
            font-weight: 700;
            background: var(--primary);
            color: #fff;
            letter-spacing: 0.04em;
        }

        /* ========== HERO ========== */
        #hero {
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding-top: var(--nav-height);
            background:
                radial-gradient(ellipse at 72% 35%, rgba(139, 44, 245, 0.22) 0%, transparent 55%),
                radial-gradient(ellipse at 28% 65%, rgba(0, 229, 255, 0.06) 0%, transparent 50%),
                var(--bg-base);
        }
        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 60px 60px;
            mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
            -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 40px 24px 60px;
            position: relative;
            z-index: 1;
        }
        .hero-left {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            background: rgba(139, 44, 245, 0.14);
            border: 1px solid rgba(139, 44, 245, 0.3);
            color: #c8a0ff;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            width: fit-content;
        }
        .hero-badge .badge-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--primary);
            animation: dotBlink 1.6s ease-in-out infinite;
        }
        @keyframes dotBlink {
            0%,
            100% {
                box-shadow: 0 0 4px var(--primary-glow);
            }
            50% {
                box-shadow: 0 0 14px var(--primary), 0 0 24px var(--primary-glow);
            }
        }
        .hero-h1 {
            font-size: clamp(2rem, 4.5vw, 3rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: #fff;
            text-shadow: 0 0 48px rgba(139, 44, 245, 0.3);
            margin: 0;
        }
        .hero-subtitle {
            font-size: 1.1rem;
            font-weight: 400;
            line-height: 1.6;
            color: #b0b0be;
            max-width: 460px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            background: var(--primary);
            color: #fff;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(139, 44, 245, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-deep);
            box-shadow: 0 8px 28px var(--primary-glow);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            background: transparent;
            color: var(--secondary);
            border: 1.5px solid var(--secondary);
            transition: all var(--transition-fast);
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 4px 20px var(--secondary-glow);
            transform: translateY(-1px);
        }
        .btn-outline:active {
            transform: scale(0.97);
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 40px;
            border-radius: var(--radius-pill);
            font-size: 1.05rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            background: var(--accent);
            color: #fff;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 20px rgba(255, 94, 19, 0.35);
        }
        .btn-accent:hover {
            box-shadow: 0 8px 36px var(--accent-glow);
            transform: translateY(-2px);
        }
        .btn-accent:active {
            transform: scale(0.96);
        }
        .hero-right {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: heroFloat 6s ease-in-out infinite;
        }
        @keyframes heroFloat {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
        }
        .hero-visual-wrap {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: 0 0 60px rgba(139, 44, 245, 0.2), 0 20px 60px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-visual-wrap img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-xl);
            position: relative;
            z-index: 1;
        }
        .hero-visual-overlay {
            position: absolute;
            inset: 0;
            z-index: 2;
            pointer-events: none;
            background: linear-gradient(to bottom, transparent 50%, rgba(10, 10, 15, 0.75) 95%),
                radial-gradient(ellipse at 40% 30%, rgba(139, 44, 245, 0.3) 0%, transparent 60%);
            border-radius: var(--radius-xl);
        }
        .hero-scroll-indicator {
            position: absolute;
            bottom: 28px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 5;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.75rem;
            letter-spacing: 0.05em;
            animation: scrollBounce 2.4s ease-in-out infinite;
        }
        @keyframes scrollBounce {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
                opacity: 0.7;
            }
            50% {
                transform: translateX(-50%) translateY(8px);
                opacity: 1;
            }
        }
        .hero-scroll-indicator i {
            font-size: 1.2rem;
            color: var(--secondary);
            animation: arrowPulse 1.8s ease-in-out infinite;
        }
        @keyframes arrowPulse {
            0%,
            100% {
                opacity: 0.4;
            }
            50% {
                opacity: 1;
            }
        }

        /* ========== SECTION COMMONS ========== */
        .section {
            padding: var(--section-gap-desktop) 0;
            position: relative;
        }
        .section-divider {
            width: 180px;
            height: 2px;
            margin: 0 auto;
            background: linear-gradient(to right, transparent, rgba(139, 44, 245, 0.5), transparent);
            border-radius: 1px;
        }
        .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            text-align: center;
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 48px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.55;
        }

        /* ========== HIGHLIGHTS ========== */
        #highlights {
            background: var(--bg-base);
            position: relative;
        }
        #highlights::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            opacity: 0.03;
            background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M40 20h4v4h-4zM80 60h6v6h-6zM120 30h8v8h-8zM160 70h5v5h-5zM50 120h7v7h-7zM100 140h6v6h-6zM150 110h8v8h-8zM30 160h5v5h-5zM130 170h7v7h-7z' fill='%2300E5FF'/%3E%3C/svg%3E");
            background-size: 300px 300px;
        }
        #highlights .container {
            position: relative;
            z-index: 1;
        }
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .highlight-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .highlight-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 70%;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            transition: transform var(--transition-smooth);
        }
        .highlight-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(139, 44, 245, 0.35);
        }
        .highlight-card:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .highlight-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.4rem;
            color: var(--secondary);
            transition: all var(--transition-smooth);
        }
        .highlight-card:hover .highlight-icon {
            background: rgba(0, 229, 255, 0.18);
            box-shadow: 0 0 22px var(--secondary-glow);
        }
        .highlight-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.01em;
        }
        .highlight-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        /* ========== CASES ========== */
        #cases {
            background: #0c0c14;
            position: relative;
        }
        .cases-waterfall {
            column-count: 3;
            column-gap: 24px;
        }
        .case-card {
            break-inside: avoid;
            margin-bottom: 24px;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            display: inline-block;
            width: 100%;
        }
        .case-card:hover {
            box-shadow: var(--shadow-case-hover);
            border-color: rgba(139, 44, 245, 0.35);
            transform: translateY(-3px);
        }
        .case-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: #1a1a24;
        }
        .case-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .case-card:hover .case-card-img-wrap img {
            transform: scale(1.04);
        }
        .case-card-img-overlay {
            position: absolute;
            inset: 0;
            pointer-events: none;
            background: linear-gradient(to bottom, transparent 50%, rgba(10, 10, 15, 0.9) 95%);
            transition: background var(--transition-smooth);
        }
        .case-card:hover .case-card-img-overlay {
            background: linear-gradient(to bottom, transparent 40%, rgba(139, 44, 245, 0.55) 95%);
        }
        .case-card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 5px 12px;
            border-radius: var(--radius-sm);
            background: rgba(0, 0, 0, 0.7);
            border: 1px solid rgba(0, 229, 255, 0.4);
            color: var(--secondary);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
        }
        .case-card-body {
            padding: 18px 20px 20px;
            position: relative;
            z-index: 2;
        }
        .case-card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
            line-height: 1.3;
        }
        .case-card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ========== COMPARE ========== */
        #compare {
            background: var(--bg-base);
        }
        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
        }
        .compare-col {
            background: var(--bg-surface);
            padding: 32px 24px;
            display: flex;
            flex-direction: column;
            gap: 18px;
            border-right: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            position: relative;
        }
        .compare-col:last-child {
            border-right: none;
        }
        .compare-col.featured {
            border: 1px solid rgba(139, 44, 245, 0.5);
            border-radius: var(--radius-xl);
            margin: -8px;
            padding: 40px 28px;
            z-index: 2;
            box-shadow: 0 0 40px rgba(139, 44, 245, 0.18);
            background: #151520;
        }
        .compare-badge {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            background: var(--accent);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            width: fit-content;
        }
        .compare-col h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #fff;
        }
        .compare-price {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -0.02em;
        }
        .compare-price span {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
        }
        .compare-features {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .compare-features li {
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.45;
        }
        .compare-features li .fa-check {
            color: var(--secondary);
            font-size: 0.8rem;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .compare-features li .fa-minus {
            color: #555;
            font-size: 0.8rem;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .compare-cta {
            margin-top: auto;
            padding-top: 12px;
        }
        .compare-cta .btn-primary,
        .compare-cta .btn-outline {
            width: 100%;
            text-align: center;
        }

        /* ========== FAQ ========== */
        #faq {
            background: #0c0c14;
        }
        .faq-list {
            max-width: 768px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .faq-item {
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            background: var(--bg-surface);
            overflow: hidden;
            transition: background var(--transition-fast);
        }
        .faq-item.active {
            background: var(--bg-elevated);
            border-color: rgba(139, 44, 245, 0.3);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            background: none;
            border: none;
            color: #fff;
            font-size: 1rem;
            font-weight: 500;
            text-align: left;
            cursor: pointer;
            letter-spacing: 0.01em;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--secondary);
        }
        .faq-marker {
            width: 10px;
            height: 10px;
            border-radius: 2px;
            background: var(--secondary);
            flex-shrink: 0;
            transition: all var(--transition-smooth);
        }
        .faq-item.active .faq-marker {
            background: var(--primary);
            box-shadow: 0 0 10px var(--primary-glow);
            border-radius: 50%;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }
        .faq-item.active .faq-answer {
            max-height: 220px;
        }
        .faq-answer-inner {
            padding: 0 20px 18px 44px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ========== CTA BANNER ========== */
        #contact {
            padding: 80px 0;
            position: relative;
            background:
                radial-gradient(ellipse at center, rgba(139, 44, 245, 0.2) 0%, rgba(10, 10, 15, 0.9) 65%),
                var(--bg-base);
            text-align: center;
            overflow: hidden;
        }
        #contact::before {
            content: '';
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        #contact .container {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 16px;
        }
        #contact h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
        }
        #contact p {
            font-size: 1.05rem;
            color: #c0c0cc;
            max-width: 500px;
            line-height: 1.6;
        }
        #contact .btn-accent {
            margin-top: 8px;
            font-size: 1.1rem;
            padding: 18px 44px;
        }
        .contact-aux {
            font-size: 0.85rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        /* ========== FOOTER ========== */
        #footer {
            background: var(--bg-footer);
            padding: 60px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand .footer-logo i {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.55;
            max-width: 260px;
        }
        .footer-col h4 {
            font-size: 0.78rem;
            font-weight: 700;
            color: #888;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: #c0c0cc;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        .footer-social-icons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-social-icons a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #c0c0cc;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }
        .footer-social-icons a:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px var(--primary-glow);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }
        .footer-bottom a {
            color: var(--secondary);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1199px) {
            .hero-grid {
                grid-template-columns: 1.05fr 0.95fr;
                gap: 36px;
            }
            .highlights-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .cases-waterfall {
                column-count: 3;
            }
        }
        @media (max-width: 991px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
                padding: 30px 24px 50px;
            }
            .hero-left {
                align-items: center;
                order: 1;
            }
            .hero-right {
                order: 0;
                max-width: 420px;
                margin: 0 auto;
            }
            .hero-subtitle {
                max-width: 100%;
                margin: 0 auto;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-badge {
                margin: 0 auto;
            }
            .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .cases-waterfall {
                column-count: 2;
                column-gap: 20px;
            }
            .compare-grid {
                grid-template-columns: 1fr;
                border-radius: var(--radius-lg);
            }
            .compare-col {
                border-right: none;
                border-bottom: 1px solid var(--border-subtle);
                border-radius: 0;
            }
            .compare-col:last-child {
                border-bottom: none;
            }
            .compare-col.featured {
                margin: 0;
                border-radius: 0;
                border-left: none;
                border-right: none;
                box-shadow: none;
                background: #151520;
                border: 1px solid rgba(139, 44, 245, 0.5);
                border-left: none;
                border-right: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .section {
                padding: var(--section-gap-tablet) 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 767px) {
            .nav-links {
                display: none;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .hero-grid {
                gap: 24px;
                padding: 20px 16px 40px;
            }
            .hero-h1 {
                font-size: 1.75rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                max-width: 320px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .highlights-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cases-waterfall {
                column-count: 1;
                column-gap: 0;
            }
            .case-card {
                margin-bottom: 18px;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .faq-question {
                font-size: 0.93rem;
                padding: 16px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 16px 38px;
                font-size: 0.85rem;
            }
            #contact h2 {
                font-size: 1.5rem;
            }
            #contact p {
                font-size: 0.9rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
                margin: 0 auto;
            }
            .footer-brand .footer-logo {
                justify-content: center;
            }
            .footer-social-icons {
                justify-content: center;
            }
            .section {
                padding: var(--section-gap-mobile) 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
                margin-bottom: 32px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-scroll-indicator {
                bottom: 14px;
                font-size: 0.7rem;
            }
        }
        @media (max-width: 520px) {
            .hero-h1 {
                font-size: 1.5rem;
            }
            .hero-subtitle {
                font-size: 0.88rem;
            }
            .hero-visual-wrap {
                border-radius: var(--radius-lg);
            }
            .hero-visual-wrap img {
                border-radius: var(--radius-lg);
            }
            .hero-visual-overlay {
                border-radius: var(--radius-lg);
            }
            .btn-accent {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
        }