/* roulang page: index */
:root {
            --color-primary: #1E0A2E;
            --color-primary-deep: #10061A;
            --color-accent: #00F0FF;
            --color-accent-deep: #0077FF;
            --color-gold: #D4AF37;
            --color-white: #FFFFFF;
            --color-text: #B0B0C0;
            --color-text-dim: #787898;
            --color-bg-dark: #0F0F1A;
            --color-bg-card: rgba(255, 255, 255, 0.05);
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-glow: rgba(0, 240, 255, 0.15);
            --radius-sm: 12px;
            --radius-md: 20px;
            --radius-lg: 24px;
            --radius-xl: 50px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.4);
            --shadow-glow-strong: 0 0 30px rgba(0, 240, 255, 0.6);
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
            --font-number: 'Montserrat', 'Segoe UI', 'system-ui', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
            --nav-height: 72px;
            --mobile-bottom-nav-height: 60px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.5s ease;
            --max-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
        }

        body {
            font-family: var(--font-body);
            background-color: var(--color-primary-deep);
            color: var(--color-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        textarea {
            font-family: inherit;
            outline: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            html {
                scroll-padding-top: 60px;
            }
        }

        /* ============ NAVIGATION ============ */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 6, 26, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border-glow);
            transition: background var(--transition-normal), box-shadow var(--transition-normal);
            display: flex;
            align-items: center;
        }
        .nav.scrolled {
            background: #0C0720;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-gold);
            letter-spacing: 0.03em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            font-size: 1.5rem;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 36px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: #B0B0C0;
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 28px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
            transition: transform var(--transition-fast);
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--color-accent);
        }
        .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-xl);
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: linear-gradient(135deg, #00F0FF, #0077FF);
            color: #fff;
            white-space: nowrap;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-normal);
        }
        .btn-nav:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-1px);
            filter: brightness(1.1);
        }
        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
        }
        .nav-mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 999;
            background: rgba(10, 6, 26, 0.97);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-normal);
        }
        .nav-mobile-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .nav-mobile-overlay a {
            font-size: 1.4rem;
            font-weight: 600;
            color: #B0B0C0;
            letter-spacing: 0.05em;
            transition: color var(--transition-fast);
        }
        .nav-mobile-overlay a:hover {
            color: var(--color-accent);
        }

        @media (max-width: 768px) {
            .nav-links,
            .nav-cta {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .nav-mobile-overlay {
                display: flex;
            }
            .nav-inner {
                padding: 0 16px;
            }
        }

        /* Mobile Bottom Nav */
        .mobile-bottom-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 998;
            height: var(--mobile-bottom-nav-height);
            background: #0C0720;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            justify-content: space-around;
            align-items: center;
            padding: 0 8px;
            padding-bottom: env(safe-area-inset-bottom, 0);
        }
        .mobile-bottom-nav a {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            font-size: 0.7rem;
            font-weight: 500;
            color: #787898;
            transition: color var(--transition-fast);
            padding: 6px 10px;
            border-radius: 10px;
        }
        .mobile-bottom-nav a.active {
            color: var(--color-accent);
        }
        .mobile-bottom-nav a i {
            font-size: 1.2rem;
        }

        @media (max-width: 768px) {
            .mobile-bottom-nav {
                display: flex;
            }
            body {
                padding-bottom: var(--mobile-bottom-nav-height);
            }
        }

        /* ============ HERO ============ */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(180deg, #1E0A2E 0%, #0C0720 40%, #10061A 100%);
            overflow: hidden;
            padding-top: var(--nav-height);
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.25;
            mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.2) 50%, rgba(0, 0, 0, 0.05) 100%);
            -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.2) 50%, rgba(0, 0, 0, 0.05) 100%);
        }
        .hero-glow {
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            top: -200px;
            right: -150px;
            pointer-events: none;
            animation: heroGlowFloat 8s ease-in-out infinite;
        }
        .hero-glow-2 {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(212, 175, 55, 0.06) 0%, transparent 70%);
            bottom: -100px;
            left: -100px;
            pointer-events: none;
            animation: heroGlowFloat 10s ease-in-out infinite reverse;
        }
        @keyframes heroGlowFloat {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(30px, -20px) scale(1.1);
            }
            66% {
                transform: translate(-20px, 15px) scale(0.9);
            }
        }
        .hero-lines {
            position: absolute;
            inset: 0;
            pointer-events: none;
            opacity: 0.06;
            background-image:
                linear-gradient(135deg, rgba(0, 240, 255, 0.5) 1px, transparent 1px),
                linear-gradient(225deg, rgba(0, 240, 255, 0.3) 1px, transparent 1px);
            background-size: 80px 80px, 120px 120px;
            background-position: 0 0, 40px 40px;
            animation: heroLines 20s linear infinite;
        }
        @keyframes heroLines {
            0% {
                transform: translate(0, 0);
            }
            100% {
                transform: translate(80px, 80px);
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            width: 100%;
        }
        .hero-text {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-xl);
            padding: 8px 18px;
            font-size: 0.85rem;
            color: var(--color-accent);
            font-weight: 600;
            width: fit-content;
            letter-spacing: 0.03em;
            animation: badgePulse 3s ease-in-out infinite;
        }
        @keyframes badgePulse {
            0%,
            100% {
                box-shadow: 0 0 8px rgba(0, 240, 255, 0.2);
            }
            50% {
                box-shadow: 0 0 20px rgba(0, 240, 255, 0.45);
            }
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 4.5vw, 3.4rem);
            font-weight: 800;
            color: var(--color-white);
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin: 0;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, #00F0FF, #D4AF37);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 1.1rem;
            color: #B0B0C0;
            line-height: 1.6;
            max-width: 480px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-xl);
            font-size: 1rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            background: linear-gradient(135deg, #00F0FF, #0077FF);
            color: #fff;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-normal);
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px) scale(1.03);
            filter: brightness(1.1);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: var(--radius-xl);
            font-size: 1rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: transparent;
            border: 2px solid var(--color-accent);
            color: var(--color-accent);
            transition: all var(--transition-normal);
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: linear-gradient(135deg, #00F0FF, #0077FF);
            color: #fff;
            border-color: transparent;
            box-shadow: var(--shadow-glow);
        }
        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-visual-img {
            width: 100%;
            max-width: 520px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0, 240, 255, 0.1);
            position: relative;
            z-index: 1;
        }
        .hero-visual-img img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-lg);
        }
        .hero-visual-ring {
            position: absolute;
            width: 120%;
            height: 120%;
            border: 2px dashed rgba(0, 240, 255, 0.2);
            border-radius: 50%;
            top: -10%;
            left: -10%;
            animation: ringRotate 30s linear infinite;
            pointer-events: none;
            z-index: 0;
        }
        @keyframes ringRotate {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }
        .hero-scroll-hint {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 3;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            color: #787898;
            font-size: 0.8rem;
            letter-spacing: 0.05em;
            cursor: pointer;
            transition: color var(--transition-fast);
            animation: scrollBounce 2s ease-in-out infinite;
        }
        .hero-scroll-hint:hover {
            color: var(--color-accent);
        }
        .hero-scroll-hint i {
            font-size: 1.2rem;
        }
        @keyframes scrollBounce {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        @media (max-width: 992px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
            .hero-text {
                align-items: center;
            }
            .hero-badge {
                margin: 0 auto;
            }
            .hero-subtitle {
                max-width: 100%;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-visual-img {
                max-width: 380px;
                margin: 0 auto;
            }
            .hero-visual-ring {
                display: none;
            }
            .hero {
                min-height: auto;
                padding-bottom: 60px;
                padding-top: calc(var(--nav-height) + 30px);
            }
        }
        @media (max-width: 576px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
            .hero-visual-img {
                max-width: 280px;
            }
            .hero-scroll-hint {
                bottom: 16px;
            }
        }

        /* ============ SECTION COMMONS ============ */
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: clamp(1.6rem, 3vw, 2.5rem);
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
            line-height: 1.25;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 1.05rem;
            color: #B0B0C0;
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        /* ============ SOLUTION ============ */
        #solution {
            background: var(--color-bg-dark);
            position: relative;
        }
        #solution::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.2), transparent);
        }
        .solution-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            padding: 40px 0;
        }
        .solution-block+.solution-block {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .solution-block.reverse .solution-img-col {
            order: -1;
        }
        .solution-text-col {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .solution-text-col h3 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-white);
        }
        .solution-text-col p {
            color: #B0B0C0;
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .badge-data {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-sm);
            padding: 8px 16px;
            font-family: var(--font-number);
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--color-accent);
            width: fit-content;
            letter-spacing: 0.02em;
        }
        .badge-data span {
            font-weight: 400;
            font-size: 0.85rem;
            color: #B0B0C0;
            font-family: var(--font-body);
        }
        .solution-img-col {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .solution-img-col img {
            width: 100%;
            height: auto;
            border-radius: var(--radius-lg);
            transition: transform var(--transition-slow);
        }
        .solution-img-col:hover img {
            transform: scale(1.03);
        }
        .solution-img-col::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 240, 255, 0.12);
            pointer-events: none;
        }

        @media (max-width: 768px) {
            .solution-block {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 28px 0;
            }
            .solution-block.reverse .solution-img-col {
                order: 0;
            }
            .solution-text-col {
                text-align: center;
                align-items: center;
            }
            .solution-text-col h3 {
                font-size: 1.25rem;
            }
        }

        /* ============ RESULTS ============ */
        #results {
            background: #161025;
            position: relative;
            overflow: hidden;
        }
        #results::after {
            content: '';
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.04) 0%, transparent 70%);
            top: -150px;
            right: -150px;
            pointer-events: none;
        }
        .results-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }
        .result-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }
        .result-card::before {
            content: '';
            position: absolute;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.07) 0%, transparent 70%);
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            pointer-events: none;
            transition: all var(--transition-slow);
        }
        .result-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 240, 255, 0.08);
            border-color: rgba(0, 240, 255, 0.25);
        }
        .result-card:hover::before {
            width: 200px;
            height: 200px;
            top: -80px;
            opacity: 1;
        }
        .result-number {
            font-family: var(--font-number);
            font-size: 3.5rem;
            font-weight: 900;
            background: linear-gradient(135deg, #00F0FF, #D4AF37);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
            position: relative;
            z-index: 1;
            line-height: 1;
            margin-bottom: 8px;
        }
        .result-unit {
            font-size: 1rem;
            color: #B0B0C0;
            font-weight: 500;
            margin-bottom: 4px;
            position: relative;
            z-index: 1;
        }
        .result-label {
            font-size: 0.9rem;
            color: #787898;
            position: relative;
            z-index: 1;
        }

        @media (max-width: 768px) {
            .results-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .result-number {
                font-size: 2.8rem;
            }
        }

        /* ============ TESTIMONIALS ============ */
        #testimonials {
            background: linear-gradient(180deg, #1A0F28 0%, #10061A 100%);
            position: relative;
        }
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
            gap: 14px;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }
        .testimonial-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
            border-color: rgba(0, 240, 255, 0.2);
        }
        .testimonial-quote-icon {
            font-size: 2.5rem;
            color: rgba(0, 240, 255, 0.2);
            line-height: 1;
            font-family: serif;
            font-style: italic;
            user-select: none;
        }
        .testimonial-text {
            font-style: italic;
            color: #C8C8D4;
            line-height: 1.7;
            font-size: 0.95rem;
            flex: 1;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #00F0FF, #0077FF);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .testimonial-author-info {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .testimonial-author-name {
            font-weight: 600;
            color: #fff;
            font-size: 0.9rem;
        }
        .testimonial-author-role {
            font-size: 0.78rem;
            color: #787898;
        }
        .testimonial-stars {
            color: var(--color-gold);
            font-size: 0.85rem;
            letter-spacing: 2px;
        }

        @media (max-width: 992px) {
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ============ FAQ ============ */
        #faq {
            background: var(--color-primary-deep);
            position: relative;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-normal);
        }
        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.18);
        }
        .faq-item.open {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.06);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            cursor: pointer;
            user-select: none;
            transition: color var(--transition-fast);
            font-weight: 600;
            color: #D0D0D8;
            font-size: 1rem;
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-item.open .faq-question {
            color: var(--color-accent);
        }
        .faq-num {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--color-accent);
            flex-shrink: 0;
            transition: all var(--transition-normal);
        }
        .faq-item.open .faq-num {
            background: rgba(0, 240, 255, 0.2);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }
        .faq-toggle {
            margin-left: auto;
            font-size: 1rem;
            color: #787898;
            transition: transform var(--transition-normal);
            flex-shrink: 0;
        }
        .faq-item.open .faq-toggle {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-normal);
            padding: 0 20px;
            color: #B0B0C0;
            line-height: 1.7;
            font-size: 0.93rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px 20px;
        }

        /* ============ CTA ============ */
        #cta {
            position: relative;
            background: linear-gradient(135deg, #1A0F28 0%, #0F1A2E 100%);
            overflow: hidden;
        }
        .cta-bg-img {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.18;
            mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 100%);
            -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 100%);
        }
        .cta-glow-top {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .cta-text-col {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .cta-text-col h2 {
            font-family: var(--font-heading);
            font-size: clamp(1.8rem, 3.2vw, 2.6rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .cta-text-col p {
            color: #B0B0C0;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .cta-form-col {
            background: rgba(10, 6, 26, 0.7);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .cta-form-col h3 {
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 4px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group label {
            font-size: 0.85rem;
            color: #B0B0C0;
            font-weight: 500;
        }
        .form-group input,
        .form-group textarea {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            padding: 12px 16px;
            color: #fff;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
            outline: none;
        }
        .form-group textarea {
            min-height: 100px;
        }
        .btn-submit {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-xl);
            font-size: 1rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            background: linear-gradient(135deg, #00F0FF, #0077FF);
            color: #fff;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-normal);
            width: 100%;
            cursor: pointer;
        }
        .btn-submit:hover {
            box-shadow: var(--shadow-glow-strong);
            filter: brightness(1.1);
            transform: translateY(-1px);
        }
        .form-success {
            display: none;
            text-align: center;
            color: var(--color-accent);
            font-weight: 600;
            padding: 20px;
            font-size: 1rem;
        }
        .form-success.show {
            display: block;
        }
        .cta-particles {
            position: absolute;
            inset: 0;
            pointer-events: none;
            z-index: 1;
        }

        @media (max-width: 768px) {
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
            .cta-text-col {
                align-items: center;
            }
            .cta-form-col {
                padding: 24px 18px;
            }
        }

        /* ============ FOOTER ============ */
        .footer {
            background: #0A0614;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-brand .footer-logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--color-gold);
            letter-spacing: 0.03em;
        }
        .footer-brand p {
            color: #787898;
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 280px;
        }
        .footer-links-title {
            font-weight: 600;
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }
        .footer-links-col {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links-col a {
            color: #787898;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-links-col a:hover {
            color: var(--color-accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 4px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #787898;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }
        .footer-social a:hover {
            color: var(--color-accent);
            border-color: var(--color-accent);
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.2);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            color: #787898;
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
                margin: 0 auto;
            }
            .footer-brand {
                align-items: center;
            }
            .footer-social {
                justify-content: center;
            }
            .footer-links-col {
                align-items: center;
            }
        }

        /* ============ MISC ============ */
        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-0 {
            margin-top: 0;
        }

        @media (max-width: 768px) {
            .hide-mobile {
                display: none !important;
            }
        }
        @media (min-width: 769px) {
            .show-mobile-only {
                display: none !important;
            }
        }

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