/* roulang page: index */
:root {
            --color-primary: #0A84FF;
            --color-primary-hover: #1E90FF;
            --color-secondary: #8B5CF6;
            --color-accent: #00E5FF;
            --color-bg-deep: #090A0F;
            --color-bg-surface: #111827;
            --color-text-primary: #FFFFFF;
            --color-text-body: #B0C4DE;
            --color-text-muted: #6B7280;
            --color-glass-bg: rgba(17, 24, 39, 0.4);
            --color-glass-border: rgba(255, 255, 255, 0.08);
            --color-glass-border-hover: rgba(10, 132, 255, 0.5);
            --color-nav-bg: rgba(9, 10, 15, 0.85);
            --radius-xl: 24px;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
            --shadow-glow-blue: 0 0 25px rgba(10, 132, 255, 0.35);
            --shadow-glow-cyan: 0 0 30px rgba(0, 229, 255, 0.45);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            background: var(--color-bg-deep);
            color: var(--color-text-body);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse at 30% 20%, rgba(10, 132, 255, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 60%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 229, 255, 0.04) 0%, transparent 55%);
            background-attachment: fixed;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            color: var(--color-text-primary);
            line-height: 1.2;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .container {
                padding: 0 2.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 0 3rem;
            }
        }

        /* ========== NAVIGATION ========== */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
            background: transparent;
            border-bottom: 1px solid transparent;
        }

        .nav.scrolled {
            background: var(--color-nav-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            height: 100%;
        }

        @media (min-width: 768px) {
            .nav-inner {
                padding: 0 2.5rem;
            }
        }
        @media (min-width: 1024px) {
            .nav-inner {
                padding: 0 3rem;
            }
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, #0A84FF 0%, #8B5CF6 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(0 0 10px rgba(10, 132, 255, 0.5));
            white-space: nowrap;
            text-decoration: none;
            min-height: 44px;
            display: flex;
            align-items: center;
        }

        .nav-logo-icon {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .nav-links {
            display: none;
            align-items: center;
            gap: 0.25rem;
        }

        @media (min-width: 768px) {
            .nav-links {
                display: flex;
                gap: 0.15rem;
            }
        }
        @media (min-width: 900px) {
            .nav-links {
                gap: 0.5rem;
            }
        }

        .nav-link {
            position: relative;
            padding: 0.55rem 0.85rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
            min-height: 44px;
            display: flex;
            align-items: center;
            text-decoration: none;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--color-primary);
            border-radius: 1px;
            transition: transform var(--transition-fast);
        }

        .nav-link:hover,
        .nav-link:focus-visible {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
            outline: none;
        }

        .nav-link.active {
            color: #fff;
        }
        .nav-link.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-link:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: -2px;
            border-radius: var(--radius-sm);
        }

        /* Hamburger */
        .nav-hamburger {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            cursor: pointer;
            z-index: 60;
            background: none;
            border: none;
            padding: 0;
            -webkit-tap-highlight-color: transparent;
        }

        .nav-hamburger:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 8px;
        }

        @media (min-width: 768px) {
            .nav-hamburger {
                display: none;
            }
        }

        .hamburger-line {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            position: relative;
            transition: background var(--transition-fast);
        }

        .hamburger-line::before,
        .hamburger-line::after {
            content: '';
            position: absolute;
            left: 0;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: transform var(--transition-fast), top var(--transition-fast);
        }

        .hamburger-line::before {
            top: -7px;
        }
        .hamburger-line::after {
            top: 7px;
        }

        .nav-hamburger.open .hamburger-line {
            background: transparent;
        }
        .nav-hamburger.open .hamburger-line::before {
            top: 0;
            transform: rotate(45deg);
        }
        .nav-hamburger.open .hamburger-line::after {
            top: 0;
            transform: rotate(-45deg);
        }

        /* Mobile nav panel */
        .nav-mobile-panel {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 55;
            background: rgba(9, 10, 15, 0.94);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

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

        .nav-mobile-link {
            font-size: 1.3rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.8);
            padding: 0.75rem 2rem;
            border-radius: var(--radius-md);
            transition: color var(--transition-fast), background var(--transition-fast);
            min-height: 48px;
            display: flex;
            align-items: center;
            text-decoration: none;
        }
        .nav-mobile-link:hover,
        .nav-mobile-link:active {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-mobile-link:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            padding-top: var(--nav-height);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(9, 10, 15, 0.65) 0%, rgba(9, 10, 15, 0.8) 40%, rgba(9, 10, 15, 0.92) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 25% 30%, rgba(10, 132, 255, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 65% 55%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
            z-index: 2;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 750px;
            padding: 2rem 1.5rem;
        }

        @media (min-width: 768px) {
            .hero-content {
                padding: 3rem 2rem;
            }
        }

        .hero-badge {
            display: inline-block;
            padding: 0.4rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.25);
            border-radius: 50px;
            margin-bottom: 1.5rem;
            letter-spacing: 0.03em;
        }

        .hero-title {
            font-size: 2.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-bottom: 1.25rem;
            background: linear-gradient(135deg, #0A84FF 0%, #8B5CF6 50%, #00E5FF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(0 0 22px rgba(10, 132, 255, 0.45));
        }

        @media (min-width: 520px) {
            .hero-title {
                font-size: 3rem;
            }
        }
        @media (min-width: 768px) {
            .hero-title {
                font-size: 3.75rem;
            }
        }
        @media (min-width: 1024px) {
            .hero-title {
                font-size: 4.25rem;
            }
        }

        .hero-subtitle {
            font-size: 1.05rem;
            color: #B0C4DE;
            line-height: 1.7;
            max-width: 580px;
            margin: 0 auto 2rem;
        }

        @media (min-width: 768px) {
            .hero-subtitle {
                font-size: 1.2rem;
                margin-bottom: 2.5rem;
            }
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            align-items: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 0.75rem 2rem;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            text-decoration: none;
            min-height: 48px;
            white-space: nowrap;
            -webkit-tap-highlight-color: transparent;
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            border: none;
            box-shadow: 0 4px 18px rgba(10, 132, 255, 0.3);
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 0 28px rgba(10, 132, 255, 0.55);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-glow {
            background: transparent;
            color: var(--color-accent);
            border: 2px solid var(--color-accent);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
        }
        .btn-glow:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
        }
        .btn-glow:active {
            transform: scale(0.98);
        }

        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .btn-ghost:hover {
            border-color: var(--color-primary);
            background: rgba(10, 132, 255, 0.1);
            color: #fff;
        }

        .hero-scroll-hint {
            position: absolute;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%);
            z-index: 3;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.35rem;
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.75rem;
            letter-spacing: 0.04em;
            animation: bounceHint 2s ease-in-out infinite;
        }

        .hero-scroll-arrow {
            width: 20px;
            height: 20px;
            border-right: 2px solid rgba(255, 255, 255, 0.45);
            border-bottom: 2px solid rgba(255, 255, 255, 0.45);
            transform: rotate(45deg);
        }

        @keyframes bounceHint {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(10px);
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 5rem 0;
        }

        @media (min-width: 768px) {
            .section {
                padding: 7rem 0;
            }
        }

        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        @media (min-width: 768px) {
            .section-header {
                margin-bottom: 4rem;
            }
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 0.75rem;
            color: #fff;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }

        .section-title-accent {
            display: inline-block;
            width: 48px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
            margin-bottom: 0.5rem;
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 550px;
            margin: 0 auto;
        }

        /* ========== DATA DASHBOARD ========== */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }

        @media (min-width: 640px) {
            .data-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.25rem;
            }
        }
        @media (min-width: 1024px) {
            .data-grid {
                gap: 1.5rem;
            }
        }

        .data-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            padding: 1.5rem 1rem;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .data-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

        .data-card:hover {
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: 0 8px 28px -8px rgba(0, 229, 255, 0.15);
            transform: translateY(-3px);
        }
        .data-card:hover::before {
            opacity: 1;
        }

        .data-icon {
            width: 40px;
            height: 40px;
            margin: 0 auto 0.75rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .data-icon svg {
            width: 100%;
            height: 100%;
        }

        .data-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-accent);
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.45);
            font-family: var(--font-heading);
            letter-spacing: -0.01em;
            margin-bottom: 0.3rem;
            animation: pulseGlow 3s ease-in-out infinite;
        }

        @media (min-width: 768px) {
            .data-value {
                font-size: 2.5rem;
            }
        }

        @keyframes pulseGlow {
            0%,
            100% {
                text-shadow: 0 0 18px rgba(0, 229, 255, 0.45);
            }
            50% {
                text-shadow: 0 0 32px rgba(0, 229, 255, 0.75);
            }
        }

        .data-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ========== SERVICES ========== */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        @media (min-width: 640px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.75rem;
            }
        }
        @media (min-width: 1024px) {
            .services-grid {
                gap: 2rem;
            }
        }

        .service-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .service-card:hover {
            border-color: var(--color-glass-border-hover);
            box-shadow: var(--shadow-glow-blue);
            transform: translateY(-4px);
        }

        .service-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(10, 132, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: background var(--transition-smooth);
        }

        .service-card:hover .service-icon-wrap {
            background: rgba(10, 132, 255, 0.2);
        }

        .service-icon-wrap svg {
            width: 28px;
            height: 28px;
        }

        .service-card-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: #fff;
            margin: 0;
        }

        .service-card-desc {
            font-size: 0.95rem;
            color: var(--color-text-body);
            line-height: 1.65;
            flex-grow: 1;
            margin: 0;
        }

        .service-card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-primary);
            transition: gap var(--transition-fast), color var(--transition-fast);
            text-decoration: none;
            align-self: flex-start;
            min-height: 44px;
            align-items: center;
        }
        .service-card-link:hover {
            gap: 0.7rem;
            color: var(--color-accent);
        }
        .service-card-link:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        .service-card-link-arrow {
            transition: transform var(--transition-fast);
            font-size: 1.1rem;
        }
        .service-card-link:hover .service-card-link-arrow {
            transform: translateX(3px);
        }

        /* ========== COMPARE ========== */
        .compare-wrapper {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            align-items: stretch;
        }

        @media (min-width: 768px) {
            .compare-wrapper {
                grid-template-columns: 1fr auto 1fr;
                gap: 1.5rem;
            }
        }

        .compare-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }

        .compare-card.negative {
            border-color: rgba(255, 80, 80, 0.15);
            background: rgba(40, 15, 15, 0.35);
        }

        .compare-card.positive {
            border-color: rgba(0, 229, 255, 0.25);
            background: rgba(10, 40, 50, 0.3);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.08);
        }

        .compare-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            color: #fff;
            text-align: center;
        }

        .compare-card.positive .compare-card-title {
            color: var(--color-accent);
            text-shadow: 0 0 10px rgba(0, 229, 255, 0.3);
        }

        .compare-list {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
        }

        .compare-list-item {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.9rem;
            color: var(--color-text-body);
            line-height: 1.5;
        }

        .compare-dot {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 700;
            margin-top: 2px;
        }

        .compare-dot.bad {
            background: rgba(255, 80, 80, 0.2);
            color: #ff5050;
        }
        .compare-dot.good {
            background: rgba(0, 229, 255, 0.18);
            color: var(--color-accent);
        }

        .compare-vs {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0.5rem;
        }

        .compare-vs-badge {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 2px solid rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.04em;
        }

        @media (max-width: 767px) {
            .compare-vs-badge {
                width: 40px;
                height: 40px;
                font-size: 0.75rem;
            }
            .compare-vs {
                padding: 0;
            }
        }

        /* ========== CASES ========== */
        .cases-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        @media (min-width: 640px) {
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.75rem;
            }
        }
        @media (min-width: 1024px) {
            .cases-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 2rem;
            }
        }

        .case-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            border-color: var(--color-glass-border-hover);
            box-shadow: var(--shadow-glow-blue);
            transform: translateY(-4px);
        }

        .case-card-image {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
            background: #0d1117;
        }

        .case-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .case-card:hover .case-card-image img {
            transform: scale(1.04);
        }

        .case-card-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(9, 10, 15, 0.7) 100%);
            pointer-events: none;
        }

        .case-card-body {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
            flex-grow: 1;
        }

        .case-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
        }
        .case-tag {
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.7rem;
            border-radius: 50px;
            background: rgba(10, 132, 255, 0.12);
            color: var(--color-primary);
            letter-spacing: 0.02em;
        }

        .case-card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin: 0;
        }

        .case-card-desc {
            font-size: 0.88rem;
            color: var(--color-text-body);
            line-height: 1.55;
            flex-grow: 1;
            margin: 0;
        }

        .case-card-stat {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--color-accent);
            text-shadow: 0 0 8px rgba(0, 229, 255, 0.3);
            margin-top: 0.25rem;
        }

        /* ========== FAQ ========== */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0.85rem;
        }

        @media (min-width: 768px) {
            .faq-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
        }

        .faq-item {
            background: var(--color-glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
        }

        .faq-item[open] {
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.1);
        }

        .faq-summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            padding: 1.15rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            color: #fff;
            font-size: 0.95rem;
            list-style: none;
            -webkit-tap-highlight-color: transparent;
            min-height: 48px;
            user-select: none;
        }

        .faq-summary::-webkit-details-marker {
            display: none;
        }
        .faq-summary::marker {
            display: none;
        }

        .faq-item[open] .faq-summary {
            color: var(--color-accent);
            text-shadow: 0 0 8px rgba(0, 229, 255, 0.25);
        }

        .faq-summary:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: -2px;
            border-radius: var(--radius-lg);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            font-weight: 300;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            color: var(--color-accent);
        }

        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.9rem;
            color: var(--color-text-body);
            line-height: 1.65;
            animation: fadeSlideIn 0.3s ease-out;
        }

        @keyframes fadeSlideIn {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--color-bg-deep);
            padding: 5rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        @media (min-width: 768px) {
            .cta-section {
                padding: 7rem 0;
            }
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            pointer-events: none;
            z-index: 1;
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-heading {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, #0A84FF 0%, #8B5CF6 50%, #00E5FF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            filter: drop-shadow(0 0 18px rgba(10, 132, 255, 0.4));
            margin-bottom: 0.75rem;
        }

        @media (min-width: 768px) {
            .cta-heading {
                font-size: 2.75rem;
            }
        }

        .cta-sub {
            font-size: 1rem;
            color: var(--color-text-body);
            margin-bottom: 2.5rem;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-giant {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            padding: 1rem 3rem;
            border-radius: 60px;
            background: transparent;
            color: var(--color-accent);
            border: 2.5px solid var(--color-accent);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
            position: relative;
            min-height: 56px;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
            animation: ctaPulse 2.5s ease-in-out infinite;
            -webkit-tap-highlight-color: transparent;
        }

        .btn-cta-giant:hover {
            background: rgba(0, 229, 255, 0.1);
            box-shadow: 0 0 45px rgba(0, 229, 255, 0.55);
            transform: translateY(-3px);
        }
        .btn-cta-giant:active {
            transform: scale(0.97);
        }
        .btn-cta-giant:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 4px;
        }

        @keyframes ctaPulse {
            0%,
            100% {
                box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
            }
            50% {
                box-shadow: 0 0 40px rgba(0, 229, 255, 0.45), 0 0 70px rgba(0, 229, 255, 0.15);
            }
        }

        /* ========== FOOTER ========== */
        .footer {
            background: rgba(9, 10, 15, 0.9);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 2rem 0;
        }

        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .footer-inner {
                padding: 0 2.5rem;
            }
        }
        @media (min-width: 1024px) {
            .footer-inner {
                padding: 0 3rem;
            }
        }

        .footer-logo-text {
            font-weight: 700;
            font-size: 0.95rem;
            background: linear-gradient(135deg, #0A84FF, #8B5CF6);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-copy {
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }

        .footer-back-top {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            cursor: pointer;
            transition: color var(--transition-fast);
            text-decoration: none;
            min-height: 44px;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .footer-back-top:hover {
            color: var(--color-accent);
        }
        .footer-back-top:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        /* ========== 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;
            }
            html {
                scroll-behavior: auto;
            }
        }

        /* ========== RESPONSIVE FINE-TUNING ========== */
        @media (max-width: 519px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 0.75rem;
            }
            .data-card {
                padding: 1.2rem 0.8rem;
            }
            .data-value {
                font-size: 1.6rem;
            }
            .section {
                padding: 3.5rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .btn {
                padding: 0.65rem 1.4rem;
                font-size: 0.85rem;
                min-height: 44px;
            }
            .btn-cta-giant {
                font-size: 0.95rem;
                padding: 0.85rem 2rem;
            }
            .case-card-image {
                height: 160px;
            }
            .faq-summary {
                padding: 1rem 1.2rem;
                font-size: 0.88rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1rem;
                font-size: 0.83rem;
            }
            .cta-heading {
                font-size: 1.5rem;
            }
            .compare-card {
                padding: 1.25rem;
            }
        }