/* roulang page: index */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.68);
            --bg-card-hover: rgba(13, 17, 30, 0.88);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-purple: #6C5CE7;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8A94A6;
            --text-faint: #5C677D;
            --border-neon: rgba(0, 240, 255, 0.22);
            --border-blue: rgba(0, 82, 255, 0.38);
            --border-glow-strong: rgba(0, 240, 255, 0.55);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-glow: 0 0 18px rgba(0, 240, 255, 0.13);
            --shadow-strong: 0 0 42px rgba(0, 82, 255, 0.22);
            --shadow-neon-btn: 0 0 22px rgba(0, 240, 255, 0.35);
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 28px;
            --spacing-lg: 48px;
            --spacing-xl: 72px;
            --spacing-2xl: 100px;
            --font-body: 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Fira Sans', 'Helvetica Neue', Arial, sans-serif;
            --font-heading: 'Poppins', 'Segoe UI', 'Roboto', 'Oxygen', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-white);
            line-height: 1.62;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--text-white);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 4px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-white);
            letter-spacing: -0.01em;
        }

        .container {
            max-width: 1200px;
        }

        .section-padding {
            padding: var(--spacing-xl) 0;
        }
        .section-padding-sm {
            padding: var(--spacing-lg) 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }
        .section-label::before {
            content: '';
            width: 28px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(1.65rem, 3.2vw, 2.35rem);
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-white);
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-silver);
            max-width: 680px;
            margin-bottom: var(--spacing-md);
            line-height: 1.65;
        }
        .text-muted-dark {
            color: var(--text-faint);
        }

        /* ===== NAVBAR ===== */
        .main-navbar {
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            padding: 10px 0;
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }
        .main-navbar.scrolled {
            background: rgba(8, 9, 15, 0.96);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-white) !important;
            letter-spacing: -0.02em;
        }
        .navbar-brand .brand-icon {
            color: var(--accent-cyan);
            margin-right: 6px;
            font-size: 1.15rem;
        }
        .navbar-brand .brand-highlight {
            background: linear-gradient(135deg, var(--accent-blue) 10%, var(--accent-cyan) 90%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .navbar-nav .nav-link {
            color: var(--text-silver) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--text-white) !important;
            background: rgba(0, 240, 255, 0.08);
        }
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
        }
        .nav-login {
            color: var(--text-silver) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .nav-login:hover {
            color: var(--text-white) !important;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-signup {
            background: linear-gradient(135deg, var(--accent-blue) 0%, #0078D4 50%, var(--accent-cyan) 100%);
            color: #fff !important;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 9px 22px;
            border-radius: 50px;
            border: none;
            white-space: nowrap;
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.35);
            transition: all 0.3s ease;
        }
        .nav-signup:hover {
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.45);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
            outline: none;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%280, 240, 255, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== HERO ===== */
        .hero-section {
            padding: 120px 0 70px;
            position: relative;
            background: radial-gradient(ellipse at 15% 25%, rgba(0, 82, 255, 0.14) 0%, transparent 55%),
                        radial-gradient(ellipse at 85% 70%, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
                        var(--bg-deep);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -180px;
            right: -180px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.09);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.22);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.25rem);
            font-weight: 800;
            line-height: 1.15;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero-title .text-gradient {
            background: linear-gradient(135deg, var(--accent-cyan) 15%, #34DDF0 40%, var(--accent-blue) 75%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 560px;
            margin-bottom: 28px;
            line-height: 1.68;
        }
        .hero-cta-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }
        .btn-glow-primary {
            background: linear-gradient(135deg, var(--accent-blue) 0%, #0078D4 45%, var(--accent-cyan) 100%);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 14px 32px;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 0 24px rgba(0, 82, 255, 0.4);
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-glow-primary:hover {
            box-shadow: 0 0 44px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-neon {
            background: transparent;
            color: var(--accent-cyan);
            border: 1.5px solid rgba(0, 240, 255, 0.45);
            border-radius: 50px;
            padding: 14px 30px;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-neon:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 22px rgba(0, 240, 255, 0.25);
            color: var(--accent-cyan);
        }
        .hero-kpi-row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 8px;
        }
        .hero-kpi-item {
            display: flex;
            flex-direction: column;
        }
        .hero-kpi-num {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.1;
        }
        .hero-kpi-label {
            font-size: 0.82rem;
            color: var(--text-silver);
            letter-spacing: 0.02em;
        }
        .hero-image-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            transform: rotate(-1.8deg);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.18);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
        }
        .hero-image-wrapper:hover {
            transform: rotate(0deg) scale(1.01);
            box-shadow: 0 28px 70px rgba(0, 0, 0, 0.55), 0 0 55px rgba(0, 240, 255, 0.15);
        }
        .hero-image-wrapper img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .hero-image-overlay {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(8, 9, 15, 0.72);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            border: 1px solid rgba(0, 240, 255, 0.22);
        }
        .hero-image-overlay .overlay-icon {
            font-size: 1.8rem;
            color: var(--accent-cyan);
        }
        .hero-image-overlay .overlay-text {
            font-size: 0.9rem;
            color: var(--text-silver);
            line-height: 1.4;
        }
        .hero-image-overlay .overlay-text strong {
            color: var(--text-white);
            display: block;
            font-size: 0.95rem;
        }

        /* ===== GLASSMORPHISM CARDS ===== */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.35s ease;
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), var(--accent-blue), transparent);
            opacity: 0;
            transition: opacity 0.35s ease;
        }
        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow-strong);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .glass-card:hover::before {
            opacity: 1;
        }
        .glass-card .card-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }
        .glass-card h3,
        .glass-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-white);
        }
        .glass-card p {
            color: var(--text-silver);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== STRATEGY CARDS ===== */
        .strategy-card {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 22px;
            height: 100%;
            transition: all 0.35s ease;
            position: relative;
        }
        .strategy-card:hover {
            border-color: var(--border-glow-strong);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.12);
            transform: translateY(-4px);
        }
        .strategy-card .strategy-rank {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
            line-height: 1;
        }
        .strategy-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-white);
        }
        .strategy-card p {
            color: var(--text-silver);
            font-size: 0.88rem;
            line-height: 1.55;
            margin-bottom: 10px;
        }
        .strategy-card .strategy-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.22);
        }
        .strategy-card .strategy-tag.tag-advanced {
            background: rgba(0, 82, 255, 0.12);
            color: #5B9BFF;
            border-color: rgba(0, 82, 255, 0.3);
        }

        /* ===== VALUE LIST ===== */
        .value-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
        }
        .value-item:last-child {
            border-bottom: none;
        }
        .value-icon {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.18), rgba(0, 240, 255, 0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .value-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .value-item p {
            color: var(--text-silver);
            font-size: 0.9rem;
            margin-bottom: 0;
            line-height: 1.55;
        }

        /* ===== QUOTE CARDS ===== */
        .quote-card {
            background: rgba(13, 17, 30, 0.65);
            border: 1px solid rgba(0, 240, 255, 0.14);
            border-left: 3px solid var(--accent-cyan);
            border-radius: var(--radius-sm);
            padding: 20px 22px;
            height: 100%;
            transition: all 0.3s ease;
        }
        .quote-card:hover {
            border-left-color: var(--accent-blue);
            background: rgba(13, 17, 30, 0.85);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.08);
        }
        .quote-text {
            font-size: 0.92rem;
            color: var(--text-silver);
            line-height: 1.6;
            font-style: italic;
            margin-bottom: 10px;
        }
        .quote-author {
            font-size: 0.82rem;
            color: var(--accent-cyan);
            font-weight: 600;
        }

        /* ===== NEWS / CMS ===== */
        .news-list-item {
            display: block;
            padding: 18px 20px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
            transition: all 0.28s ease;
            border-radius: var(--radius-sm);
            text-decoration: none;
        }
        .news-list-item:hover {
            background: rgba(0, 240, 255, 0.06);
        }
        .news-list-item .news-tag {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 4px;
            display: block;
        }
        .news-list-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 4px;
            line-height: 1.4;
            transition: color 0.25s ease;
        }
        .news-list-item:hover h4 {
            color: var(--accent-cyan);
        }
        .news-list-item p {
            color: var(--text-silver);
            font-size: 0.85rem;
            margin-bottom: 4px;
            line-height: 1.5;
        }
        .news-list-item .news-date {
            font-size: 0.78rem;
            color: var(--text-faint);
            letter-spacing: 0.02em;
        }
        .recommend-card {
            background: rgba(13, 17, 30, 0.7);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.35s ease;
            height: 100%;
        }
        .recommend-card:hover {
            border-color: var(--border-glow-strong);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .recommend-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .recommend-card .recommend-body {
            padding: 16px 18px;
        }
        .recommend-card h5 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .recommend-card p {
            color: var(--text-silver);
            font-size: 0.82rem;
            margin-bottom: 0;
            line-height: 1.5;
        }
        .no-updates {
            color: var(--text-silver);
            font-size: 0.95rem;
            padding: 20px;
            text-align: center;
            border: 1px dashed rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-sm);
        }

        /* ===== STEPS ===== */
        .step-card {
            text-align: left;
            padding: 22px 22px;
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.14);
            border-radius: var(--radius-md);
            height: 100%;
            transition: all 0.3s ease;
        }
        .step-card:hover {
            border-color: var(--border-glow-strong);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.1);
        }
        .step-number {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .step-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-card p {
            color: var(--text-silver);
            font-size: 0.88rem;
            line-height: 1.55;
            margin-bottom: 0;
        }
        .objection-item {
            padding: 16px 18px;
            background: rgba(13, 17, 30, 0.55);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            transition: all 0.3s ease;
        }
        .objection-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
            background: rgba(13, 17, 30, 0.75);
        }
        .objection-q {
            font-weight: 600;
            color: var(--accent-cyan);
            font-size: 0.9rem;
            margin-bottom: 4px;
        }
        .objection-a {
            color: var(--text-silver);
            font-size: 0.85rem;
            margin-bottom: 0;
            line-height: 1.5;
        }

        /* ===== BADGES ===== */
        .badge-guarantee {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 18px;
            background: rgba(13, 17, 30, 0.55);
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
            height: 100%;
        }
        .badge-guarantee:hover {
            border-color: rgba(0, 240, 255, 0.35);
            background: rgba(13, 17, 30, 0.75);
        }
        .badge-guarantee i {
            font-size: 1.4rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .badge-guarantee span {
            font-size: 0.88rem;
            color: var(--text-silver);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .accordion-item {
            background: rgba(13, 17, 30, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.12);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: all 0.3s ease;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.06);
            color: var(--accent-cyan);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            border: none;
        }
        .accordion-button::after {
            filter: brightness(0) invert(0.7);
        }
        .accordion-body {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.6;
            padding: 12px 22px 20px;
        }

        /* ===== LEAD FORM ===== */
        .lead-form-wrapper {
            background: rgba(13, 17, 30, 0.75);
            backdrop-filter: blur(18px);
            border: 1px solid rgba(0, 240, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 240, 255, 0.05);
        }
        .lead-form-wrapper .form-control {
            background: rgba(8, 9, 15, 0.75);
            border: 1px solid rgba(0, 240, 255, 0.18);
            border-radius: var(--radius-sm);
            color: var(--text-white);
            padding: 12px 16px;
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }
        .lead-form-wrapper .form-control:focus {
            background: rgba(8, 9, 15, 0.9);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.15);
            color: var(--text-white);
        }
        .lead-form-wrapper .form-control::placeholder {
            color: var(--text-faint);
        }
        .lead-form-wrapper .form-label {
            color: var(--text-silver);
            font-weight: 500;
            font-size: 0.85rem;
            margin-bottom: 6px;
        }
        .btn-submit-form {
            background: linear-gradient(135deg, var(--accent-blue) 0%, #0078D4 45%, var(--accent-cyan) 100%);
            color: #fff;
            border: none;
            border-radius: 50px;
            padding: 13px 28px;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 0 22px rgba(0, 82, 255, 0.35);
            transition: all 0.3s ease;
            width: 100%;
        }
        .btn-submit-form:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== FOOTER ===== */
        .main-footer {
            background: var(--bg-navy);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding: 48px 0 28px;
        }
        .footer-brand {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .footer-highlight {
            color: var(--accent-cyan);
        }
        .footer-desc {
            color: var(--text-silver);
            font-size: 0.88rem;
            line-height: 1.6;
            max-width: 400px;
            margin-bottom: 18px;
        }
        .footer-title {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: var(--text-silver);
            font-size: 0.88rem;
            transition: all 0.25s ease;
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            margin-top: 32px;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .footer-copyright {
            color: var(--text-faint);
            font-size: 0.8rem;
        }
        .footer-badges {
            display: flex;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-faint);
        }
        .footer-badges i {
            color: var(--accent-cyan);
            margin-right: 4px;
        }

        /* ===== FAB ===== */
        .fab-neon {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(13, 17, 30, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid rgba(0, 240, 255, 0.55);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35), 0 0 40px rgba(0, 82, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #00F0FF;
            font-size: 1.3rem;
            opacity: 0.6;
            transition: all 0.35s ease;
            cursor: pointer;
            text-decoration: none;
            min-width: 56px;
            min-height: 56px;
            touch-action: manipulation;
        }
        .fab-neon:hover {
            opacity: 1;
            box-shadow: 0 0 38px rgba(0, 240, 255, 0.6), 0 0 65px rgba(0, 82, 255, 0.3);
            transform: scale(1.08);
            color: #00F0FF;
        }
        .fab-neon:active {
            transform: scale(0.95);
        }
        .fab-dot {
            position: absolute;
            top: 4px;
            right: 5px;
            width: 10px;
            height: 10px;
            background: #FF2E63;
            border-radius: 50%;
            border: 2px solid var(--bg-navy);
            animation: fabPulse 1.8s ease-in-out infinite;
        }
        @keyframes fabPulse {
            0%, 100% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.35);
                opacity: 0.6;
            }
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .hero-section {
                padding: 100px 0 56px;
            }
            .hero-image-wrapper img {
                height: 340px;
            }
            .section-padding {
                padding: var(--spacing-lg) 0;
            }
        }

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .hero-section {
                padding: 88px 0 40px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 0.98rem;
            }
            .hero-image-wrapper {
                transform: rotate(0deg);
                margin-top: 24px;
            }
            .hero-image-wrapper img {
                height: 260px;
            }
            .hero-kpi-row {
                gap: 16px;
            }
            .hero-kpi-num {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.45rem;
            }
            .section-desc {
                font-size: 0.95rem;
            }
            .lead-form-wrapper {
                padding: 24px 18px;
            }
            .navbar-nav {
                padding: 12px 0;
            }
            .navbar-nav .nav-link {
                padding: 10px 16px !important;
                font-size: 0.9rem;
            }
            .nav-signup {
                padding: 7px 16px;
                font-size: 0.85rem;
            }
            .nav-login {
                padding: 7px 12px;
                font-size: 0.85rem;
            }
            .fab-neon {
                width: 48px;
                height: 48px;
                min-width: 48px;
                min-height: 48px;
                font-size: 1.1rem;
                left: 0.8rem;
                bottom: 5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.55rem;
            }
            .hero-desc {
                font-size: 0.9rem;
            }
            .hero-cta-wrap {
                flex-direction: column;
                gap: 10px;
            }
            .btn-glow-primary,
            .btn-outline-neon {
                padding: 12px 22px;
                font-size: 0.92rem;
                justify-content: center;
            }
            .hero-kpi-row {
                gap: 12px;
            }
            .hero-kpi-num {
                font-size: 1.25rem;
            }
            .section-padding {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .glass-card,
            .strategy-card,
            .step-card,
            .quote-card,
            .badge-guarantee,
            .objection-item {
                padding: 16px;
            }
            .news-list-item {
                padding: 14px 14px;
            }
            .recommend-card img {
                height: 120px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #070B14;
            --bg-secondary: #0D1424;
            --bg-glass: rgba(13, 24, 48, 0.72);
            --bg-glass-light: rgba(20, 35, 65, 0.55);
            --border-glass: rgba(0, 200, 255, 0.18);
            --border-glass-strong: rgba(0, 180, 255, 0.35);
            --text-primary: #F0F6FF;
            --text-secondary: #B8C8E8;
            --text-muted: #7A8FB8;
            --accent-blue: #00B4FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 180, 255, 0.35);
            --accent-soft: rgba(0, 180, 255, 0.12);
            --accent-green: #00D68F;
            --accent-gold: #FFC94D;
            --accent-red: #FF4D6A;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 24px rgba(0, 180, 255, 0.28);
            --transition: all 0.22s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-body: 'Segoe UI', 'Roboto', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-primary);
            font-family: var(--font-body);
            line-height: 1.65;
            letter-spacing: 0.015em;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            letter-spacing: -0.015em;
            color: var(--text-primary);
            line-height: 1.3;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--text-primary);
        }

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

        .container {
            max-width: 1180px;
        }

        /* ========== NAVBAR ========== */
        .main-navbar {
            background: rgba(7, 11, 20, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 180, 255, 0.14);
            padding: 14px 0;
            transition: var(--transition);
        }

        .main-navbar.scrolled {
            background: rgba(7, 11, 20, 0.96);
            box-shadow: 0 6px 28px rgba(0, 0, 0, 0.5);
            padding: 10px 0;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary) !important;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.02em;
        }

        .brand-icon {
            color: var(--accent-cyan);
            font-size: 1.4rem;
        }

        .brand-highlight {
            color: var(--accent-cyan);
        }

        .main-navbar .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 30px;
            transition: var(--transition);
            position: relative;
        }

        .main-navbar .nav-link:hover {
            color: var(--text-primary);
            background: rgba(0, 180, 255, 0.08);
        }

        .main-navbar .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(0, 180, 255, 0.12);
        }

        .nav-login {
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 14px;
            border-radius: 30px;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-login:hover {
            color: var(--accent-cyan);
            background: rgba(0, 180, 255, 0.08);
        }

        .nav-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #07101E;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 10px 20px;
            border-radius: 30px;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 0 18px rgba(0, 180, 255, 0.3);
        }

        .nav-signup:hover {
            color: #07101E;
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 180, 255, 0.45);
        }

        .navbar-toggler {
            border: 1px solid rgba(0, 180, 255, 0.25);
            padding: 6px 10px;
            border-radius: 8px;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 180, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ========== HERO / BANNER ========== */
        .page-hero {
            position: relative;
            padding: 150px 0 90px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 11, 20, 0.55) 0%, rgba(7, 11, 20, 0.82) 60%, var(--bg-deep) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 22px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .hero-breadcrumb a {
            color: var(--text-muted);
        }

        .hero-breadcrumb a:hover {
            color: var(--accent-cyan);
        }

        .hero-breadcrumb .separator {
            color: var(--accent-cyan);
            opacity: 0.6;
        }

        .page-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            margin-bottom: 18px;
            max-width: 780px;
        }

        .page-hero .hero-subtitle {
            font-size: 1.12rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 28px;
        }

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

        .btn-glow {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #07101E;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 30px;
            border-radius: 40px;
            border: none;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 180, 255, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-glow:hover {
            color: #07101E;
            transform: translateY(-3px);
            box-shadow: 0 0 32px rgba(0, 180, 255, 0.5);
        }

        .btn-glass {
            background: var(--bg-glass);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 40px;
            border: 1px solid var(--border-glass);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .btn-glass:hover {
            color: var(--accent-cyan);
            border-color: var(--border-glass-strong);
            background: rgba(0, 180, 255, 0.1);
        }

        .strategy-series-bar {
            margin-top: 42px;
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            padding: 16px 22px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .strategy-series-bar .series-label {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            white-space: nowrap;
        }

        .strategy-series-bar .series-item {
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            white-space: nowrap;
            transition: var(--transition);
        }

        .strategy-series-bar .series-item:hover {
            color: var(--text-primary);
            border-color: var(--border-glass-strong);
        }

        .strategy-series-bar .series-item.active-item {
            color: #07101E;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-color: transparent;
            font-weight: 700;
        }

        /* ========== SECTION ========== */
        .section-block {
            padding: 70px 0;
            position: relative;
        }

        .section-block.section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 180, 255, 0.06);
            border-bottom: 1px solid rgba(0, 180, 255, 0.06);
        }

        .section-label {
            font-size: 0.82rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(1.5rem, 2.8vw, 2.1rem);
            font-weight: 800;
            margin-bottom: 16px;
            max-width: 700px;
        }

        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 680px;
            margin-bottom: 36px;
        }

        /* ========== GLASS CARDS ========== */
        .glass-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            height: 100%;
            transition: var(--transition);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            position: relative;
            overflow: hidden;
        }

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

        .glass-card:hover {
            border-color: var(--border-glass-strong);
            transform: translateY(-5px);
            box-shadow: var(--shadow-glow);
        }

        .glass-card:hover::before {
            opacity: 1;
        }

        .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            background: var(--accent-soft);
            color: var(--accent-cyan);
            border: 1px solid var(--border-glass);
        }

        .glass-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .glass-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        .glass-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-top: 14px;
        }

        /* ========== FEATURE LIST ========== */
        .feature-list-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 0;
            border-bottom: 1px solid rgba(0, 180, 255, 0.08);
        }

        .feature-list-item:last-child {
            border-bottom: none;
        }

        .feature-check {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-green);
            font-size: 1rem;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .feature-list-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .feature-list-item p {
            color: var(--text-secondary);
            font-size: 0.93rem;
            margin-bottom: 0;
        }

        /* ========== STATS ========== */
        .stats-row {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: flex-start;
        }

        .stat-box {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            min-width: 160px;
            flex: 1;
            text-align: left;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: var(--transition);
        }

        .stat-box:hover {
            border-color: var(--border-glass-strong);
            box-shadow: var(--shadow-glow);
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 6px;
        }

        /* ========== IMAGE PANEL ========== */
        .image-panel {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            position: relative;
        }

        .image-panel img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .image-panel .image-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 18px 22px;
            background: linear-gradient(0deg, rgba(7, 11, 20, 0.92), transparent);
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        /* ========== FAQ ========== */
        .accordion-item {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 20px 24px;
            border: none;
            box-shadow: none !important;
            letter-spacing: 0;
        }

        .accordion-button:not(.collapsed) {
            background: var(--accent-soft);
            color: var(--accent-cyan);
        }

        .accordion-button::after {
            filter: invert(0.6);
        }

        .accordion-body {
            color: var(--text-secondary);
            padding: 18px 24px 22px;
            font-size: 0.95rem;
        }

        /* ========== CTA FINAL ========== */
        .cta-final {
            background: linear-gradient(135deg, rgba(0, 180, 255, 0.1), rgba(0, 240, 255, 0.04));
            border: 1px solid var(--border-glass-strong);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-final::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 30%, rgba(0, 180, 255, 0.08), transparent 70%);
            pointer-events: none;
        }

        .cta-final h2 {
            font-size: clamp(1.4rem, 2.5vw, 2rem);
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-final p {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 26px;
        }

        /* ========== FOOTER ========== */
        .main-footer {
            background: #05080F;
            border-top: 1px solid rgba(0, 180, 255, 0.1);
            padding: 50px 0 24px;
            margin-top: 0;
        }

        .footer-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
        }

        .footer-highlight {
            color: var(--accent-cyan);
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 400px;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            margin-top: 32px;
            border-top: 1px solid rgba(0, 180, 255, 0.08);
        }

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

        .footer-badges {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .footer-badges span {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .footer-badges i {
            color: var(--accent-cyan);
        }

        /* ========== FAB ========== */
        .fab-floating {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(13, 24, 48, 0.85);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            cursor: pointer;
            transition: var(--transition);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            position: fixed;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab-floating::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            z-index: -1;
            opacity: 0.7;
        }

        .fab-floating:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.55);
            transform: scale(1.1);
        }

        @keyframes fab-breathe {
            0%, 100% {
                opacity: 0.65;
                transform: translateY(0);
            }
            50% {
                opacity: 1;
                transform: translateY(-4px);
            }
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 991.98px) {
            .main-navbar .nav-link {
                padding: 10px 12px !important;
            }

            .page-hero {
                padding: 130px 0 60px;
                min-height: 420px;
            }

            .strategy-series-bar {
                flex-wrap: wrap;
                gap: 8px;
            }
        }

        @media (max-width: 767.98px) {
            .page-hero {
                padding: 110px 0 48px;
                min-height: auto;
            }

            .page-hero h1 {
                font-size: 1.7rem;
            }

            .section-block {
                padding: 48px 0;
            }

            .glass-card {
                padding: 22px 18px;
            }

            .stats-row {
                gap: 12px;
            }

            .stat-box {
                min-width: 130px;
                padding: 20px 16px;
                flex: 1 1 40%;
            }

            .stat-number {
                font-size: 1.5rem;
            }

            .cta-final {
                padding: 32px 20px;
                border-radius: var(--radius-lg);
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 12px;
            }

            .hero-cta-group {
                flex-direction: column;
            }

            .btn-glow, .btn-glass {
                justify-content: center;
                width: 100%;
            }

            .image-panel img {
                height: 220px;
            }
        }

        @media (max-width: 519.98px) {
            .page-hero h1 {
                font-size: 1.45rem;
            }

            .hero-subtitle {
                font-size: 1rem;
            }

            .stat-box {
                flex: 1 1 100%;
                min-width: 100%;
            }

            .strategy-series-bar {
                padding: 12px 14px;
                border-radius: 12px;
            }

            .strategy-series-bar .series-item {
                font-size: 0.78rem;
                padding: 5px 12px;
            }

            .accordion-button {
                font-size: 0.9rem;
                padding: 16px 18px;
            }

            .accordion-body {
                padding: 14px 18px 18px;
                font-size: 0.9rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-tertiary: #111827;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-hover: #3380FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --glass-bg: rgba(13, 17, 30, 0.72);
            --glass-border: rgba(0, 82, 255, 0.28);
            --glass-border-hover: rgba(0, 240, 255, 0.55);
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 24px rgba(0, 82, 255, 0.35);
            --shadow-glow-cyan: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-primary: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --line-height-body: 1.65;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

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

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

        a {
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== NAVBAR ===== */
        .main-navbar {
            background: rgba(8, 9, 15, 0.92) !important;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.18);
            padding: 14px 0;
            transition: padding 0.3s ease, border-color 0.3s ease;
            z-index: 1030;
        }
        .main-navbar.scrolled {
            padding: 10px 0;
            border-bottom-color: rgba(0, 240, 255, 0.3);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary) !important;
            letter-spacing: -0.02em;
        }
        .brand-icon {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
        }
        .brand-highlight {
            color: var(--accent-cyan);
        }
        .main-navbar .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 10px;
            transition: all 0.25s ease;
            position: relative;
        }
        .main-navbar .nav-link:hover,
        .main-navbar .nav-link:focus {
            color: var(--text-primary) !important;
            background: rgba(0, 82, 255, 0.12);
        }
        .main-navbar .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.08);
        }
        .main-navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
        }
        .nav-login {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 14px;
            border-radius: 10px;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .nav-login:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 9px 20px;
            border-radius: 10px;
            white-space: nowrap;
            box-shadow: 0 0 16px rgba(0, 82, 255, 0.35);
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .nav-signup:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.5);
            color: #fff;
            transform: translateY(-1px);
        }
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2) !important;
            padding: 8px 10px;
            border-radius: 8px;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.3) !important;
        }

        /* ===== ARTICLE HERO ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 60px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 480px;
            display: flex;
            align-items: flex-end;
            isolation: isolate;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: -1;
            background: linear-gradient(180deg, rgba(8, 9, 15, 0.55) 0%, rgba(8, 9, 15, 0.85) 55%, rgba(8, 9, 15, 0.98) 100%);
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            z-index: -1;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.4;
        }
        .article-hero .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 82, 255, 0.25);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 240, 255, 0.4);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 8px 16px;
            border-radius: 50px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.025em;
            margin-bottom: 16px;
            color: var(--text-primary);
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }
        .article-hero .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 720px;
            margin-bottom: 20px;
        }
        .article-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.88rem;
            font-weight: 500;
        }
        .article-hero .hero-meta i {
            color: var(--accent-cyan);
            margin-right: 6px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 24px;
        }

        /* ===== GLOW BUTTONS ===== */
        .btn-glow-primary {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            padding: 13px 28px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-glow-primary:hover,
        .btn-glow-primary:focus {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.55), 0 6px 20px rgba(0, 0, 0, 0.4);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-glow-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-glow-secondary {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 13px 28px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-glow-secondary:hover,
        .btn-glow-secondary:focus {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.25);
        }

        /* ===== SECTION BASE ===== */
        .section-pad {
            padding: 56px 0;
        }
        .section-pad-lg {
            padding: 72px 0;
        }
        .section-title {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 28px;
        }
        .section-divider {
            width: 56px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 2px;
            margin-bottom: 20px;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
        }
        .text-accent {
            color: var(--accent-cyan);
        }

        /* ===== ARTICLE CONTENT ===== */
        .article-body-wrapper {
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: var(--shadow-md);
            margin-bottom: 24px;
        }
        .article-content {
            max-width: 800px;
            margin: 0 auto;
            color: var(--text-secondary);
            font-size: 1.02rem;
            line-height: 1.75;
        }
        .article-content h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 32px;
            margin-bottom: 14px;
            letter-spacing: -0.015em;
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 24px;
            margin-bottom: 10px;
        }
        .article-content p {
            margin-bottom: 16px;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 20px 0;
        }
        .article-content blockquote {
            background: rgba(0, 82, 255, 0.08);
            border-left: 4px solid var(--accent-cyan);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 28px 0;
            color: var(--text-primary);
            font-weight: 500;
            font-style: italic;
        }
        .article-content a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: #fff;
        }
        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
        }
        .article-not-found i {
            font-size: 3rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }
        .article-not-found h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .article-not-found a {
            color: var(--accent-cyan);
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        /* ===== PULL QUOTE ===== */
        .pull-quote-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.1), rgba(0, 240, 255, 0.05));
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 82, 255, 0.25);
            padding: 36px 40px;
            margin: 24px 0 48px;
            position: relative;
        }
        .pull-quote-section::before {
            content: '\201C';
            position: absolute;
            top: 8px;
            left: 20px;
            font-size: 5rem;
            color: rgba(0, 240, 255, 0.3);
            font-weight: 900;
            line-height: 1;
        }
        .pull-quote-text {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.65;
            padding-left: 40px;
            margin: 0;
            font-style: italic;
        }

        /* ===== STRATEGY CARDS (GLASSMORPHISM) ===== */
        .strategy-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.35s ease;
            height: 100%;
            position: relative;
            box-shadow: var(--shadow-sm);
        }
        .strategy-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-glow);
            transform: translateY(-6px);
        }
        .strategy-card .card-img-wrap {
            position: relative;
            height: 160px;
            overflow: hidden;
            background: var(--bg-tertiary);
        }
        .strategy-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .strategy-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .strategy-card .card-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(8, 9, 15, 0.9) 100%);
        }
        .strategy-card .strategy-number {
            position: absolute;
            top: 12px;
            left: 14px;
            background: rgba(0, 82, 255, 0.55);
            backdrop-filter: blur(8px);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 0 16px rgba(0, 82, 255, 0.5);
            z-index: 2;
        }
        .strategy-card .difficulty-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            z-index: 2;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.72rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .difficulty-easy {
            background: rgba(34, 197, 94, 0.25);
            color: #4ade80;
            border: 1px solid rgba(74, 222, 128, 0.4);
        }
        .difficulty-medium {
            background: rgba(255, 193, 7, 0.2);
            color: #fbbf24;
            border: 1px solid rgba(251, 191, 36, 0.4);
        }
        .difficulty-hard {
            background: rgba(239, 68, 68, 0.2);
            color: #f87171;
            border: 1px solid rgba(248, 113, 113, 0.4);
        }
        .strategy-card .card-body {
            padding: 20px 22px 22px;
        }
        .strategy-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .strategy-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.65;
            margin-bottom: 12px;
        }
        .strategy-card .card-link {
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.25s ease;
        }
        .strategy-card .card-link:hover {
            color: #fff;
            gap: 10px;
        }

        /* ===== STATS ROW ===== */
        .stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-top: 24px;
        }
        .stat-item {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            text-align: center;
            min-width: 140px;
            flex: 1 1 auto;
            max-width: 200px;
            transition: all 0.3s ease;
        }
        .stat-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
            box-shadow: var(--shadow-glow-cyan);
        }
        .stat-number {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--accent-cyan);
            letter-spacing: -0.03em;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
            margin-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin-top: 8px;
        }
        .faq-list .accordion-item {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-list .accordion-item:hover {
            border-color: rgba(0, 240, 255, 0.25);
        }
        .faq-list .accordion-button {
            background: rgba(13, 17, 30, 0.8);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.98rem;
            padding: 18px 22px;
            border-radius: var(--radius-sm) !important;
            box-shadow: none;
        }
        .faq-list .accordion-button:not(.collapsed) {
            background: rgba(0, 82, 255, 0.12);
            color: var(--accent-cyan);
            box-shadow: none;
        }
        .faq-list .accordion-button::after {
            filter: invert(1);
            opacity: 0.7;
        }
        .faq-list .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.25);
        }
        .faq-list .accordion-body {
            background: rgba(8, 9, 15, 0.85);
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
            padding: 18px 22px;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.06));
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 82, 255, 0.3);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(0, 240, 255, 0.06) 0%, transparent 60%);
            animation: ctaPulse 6s ease-in-out infinite;
        }
        @keyframes ctaPulse {
            0%, 100% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.1); opacity: 0.8; }
        }
        .cta-section h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 24px;
            position: relative;
            z-index: 1;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            position: relative;
            z-index: 1;
        }

        /* ===== FAB ===== */
        .fab-cyber {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4), 0 4px 16px rgba(0, 0, 0, 0.4);
            opacity: 0.65;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            animation: fabBreathe 3s ease-in-out infinite;
        }
        .fab-cyber::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            padding: 2px;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }
        .fab-cyber:hover {
            opacity: 1;
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7), 0 6px 24px rgba(0, 0, 0, 0.5);
            transform: scale(1.1);
        }
        .fab-cyber:active {
            transform: scale(0.95);
        }
        .fab-cyber .fab-icon {
            font-size: 1.4rem;
            color: var(--accent-cyan);
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
            transition: all 0.3s ease;
        }
        .fab-cyber:hover .fab-icon {
            animation: fabFlicker 0.6s ease-in-out;
        }
        @keyframes fabBreathe {
            0%, 100% { opacity: 0.65; }
            50% { opacity: 0.9; }
        }
        @keyframes fabFlicker {
            0% { opacity: 0.4; }
            20% { opacity: 1; }
            40% { opacity: 0.4; }
            60% { opacity: 1; }
            80% { opacity: 0.7; }
            100% { opacity: 1; }
        }
        .fab-cyber .fab-badge {
            position: absolute;
            top: -6px;
            right: -6px;
            width: 20px;
            height: 20px;
            background: #FF007F;
            color: #fff;
            font-size: 0.6rem;
            font-weight: 800;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: badgePulse 2s ease-in-out infinite;
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.6);
        }
        @keyframes badgePulse {
            0%, 100% { box-shadow: 0 0 8px rgba(255, 0, 127, 0.5); }
            50% { box-shadow: 0 0 18px rgba(255, 0, 127, 0.9); }
        }

        /* ===== FOOTER ===== */
        .main-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 82, 255, 0.18);
            padding: 48px 0 24px;
            margin-top: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .footer-brand i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
        }
        .footer-highlight {
            color: var(--accent-cyan);
        }
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 420px;
        }
        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: all 0.25s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 20px;
            margin-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-copyright {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-badges span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-secondary);
            background: rgba(0, 82, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 6px 12px;
            border-radius: 20px;
        }
        .footer-badges i {
            color: var(--accent-cyan);
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 992px) {
            .article-hero {
                padding: 120px 0 48px;
                min-height: 400px;
            }
            .article-body-wrapper {
                padding: 28px 20px;
            }
            .strategy-card .card-img-wrap {
                height: 130px;
            }
            .faq-section {
                padding: 28px 20px;
            }
            .cta-section {
                padding: 36px 24px;
            }
        }
        @media (max-width: 768px) {
            .main-navbar {
                padding: 10px 0;
            }
            .article-hero {
                padding: 110px 0 40px;
                min-height: 360px;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-hero .hero-subtitle {
                font-size: 0.95rem;
            }
            .article-hero .hero-meta {
                gap: 10px;
                font-size: 0.8rem;
            }
            .section-pad {
                padding: 36px 0;
            }
            .section-pad-lg {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .strategy-card .card-img-wrap {
                height: 120px;
            }
            .pull-quote-section {
                padding: 24px 20px;
            }
            .pull-quote-text {
                font-size: 1rem;
                padding-left: 8px;
            }
            .stats-row {
                gap: 10px;
            }
            .stat-item {
                min-width: 100px;
                padding: 14px 16px;
            }
            .stat-number {
                font-size: 1.4rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-badges {
                justify-content: center;
            }
            .fab-cyber {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
            }
        }
        @media (max-width: 520px) {
            .article-hero {
                padding: 100px 0 32px;
                min-height: 320px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-hero .hero-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .article-body-wrapper {
                padding: 20px 14px;
                border-radius: var(--radius-md);
            }
            .article-content {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .btn-glow-primary,
            .btn-glow-secondary {
                width: 100%;
                justify-content: center;
            }
            .stat-item {
                min-width: 80px;
                padding: 12px 10px;
            }
            .stat-number {
                font-size: 1.2rem;
            }
            .stat-label {
                font-size: 0.7rem;
            }
            .faq-section,
            .cta-section {
                padding: 22px 14px;
                border-radius: var(--radius-md);
            }
            .faq-list .accordion-button {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .pull-quote-section::before {
                font-size: 3rem;
                top: 6px;
                left: 10px;
            }
            .pull-quote-text {
                padding-left: 20px;
                font-size: 0.92rem;
            }
        }

        /* ===== ACCESSIBILITY ===== */
        :focus-visible {
            outline: 3px solid rgba(0, 240, 255, 0.6);
            outline-offset: 2px;
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-tertiary: #111827;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.45);
            --accent-blue-glow: rgba(0, 82, 255, 0.35);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8896AB;
            --border-glow: rgba(0, 240, 255, 0.25);
            --border-subtle: rgba(148, 163, 184, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --font-body: 'Inter', 'Segoe UI', 'Roboto', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-silver);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== NAVBAR ===== */
        .main-navbar {
            background: rgba(8, 9, 15, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 14px 0;
            transition: all var(--transition);
            z-index: 1030;
        }

        .main-navbar.scrolled {
            padding: 10px 0;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
            background: rgba(8, 9, 15, 0.96);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-white);
            letter-spacing: -0.01em;
        }

        .navbar-brand .brand-icon {
            font-size: 1.5rem;
            color: var(--accent-cyan);
            filter: drop-shadow(0 0 8px var(--accent-glow));
        }

        .navbar-brand .brand-highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 12px var(--accent-glow);
        }

        .navbar-nav .nav-link {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.06);
        }

        .navbar-nav .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
            box-shadow: inset 0 0 0 1px var(--border-glow);
        }

        .nav-login {
            color: var(--text-silver);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .nav-login:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.35);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-signup:hover {
            box-shadow: 0 6px 30px rgba(0, 240, 255, 0.45);
            transform: translateY(-1px);
            color: var(--text-white);
        }

        .navbar-toggler {
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 8px 10px;
            background: rgba(255, 255, 255, 0.04);
            transition: all var(--transition);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px var(--accent-glow);
            border-color: var(--accent-cyan);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2300F0FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== HERO ===== */
        .hero-advanced {
            padding: 160px 0 90px;
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 40%, var(--bg-primary) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-advanced::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-advanced::after {
            content: '';
            position: absolute;
            bottom: -250px;
            left: -150px;
            width: 550px;
            height: 550px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.07) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 7px 16px;
            border-radius: 50px;
            margin-bottom: 22px;
            letter-spacing: 0.02em;
        }

        .hero-badge .badge-dot {
            width: 7px;
            height: 7px;
            background: var(--accent-cyan);
            border-radius: 50%;
            animation: pulse-dot 1.8s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 240, 255, 0.5); }
            50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0, 240, 255, 0); }
        }

        .hero-advanced h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .hero-advanced h1 .text-glow {
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 60%, var(--accent-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.35));
        }

        .hero-advanced .hero-desc {
            font-size: 1.12rem;
            color: var(--text-silver);
            max-width: 580px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            margin-bottom: 38px;
        }

        .btn-glow-primary {
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: var(--text-white);
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 24px rgba(0, 82, 255, 0.4), 0 0 40px rgba(0, 240, 255, 0.18);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: none;
        }

        .btn-glow-primary:hover {
            box-shadow: 0 6px 35px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        .btn-glow-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 16px rgba(0, 82, 255, 0.3);
        }

        .btn-outline-glow {
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 1rem;
            padding: 13px 26px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glow);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
            color: var(--accent-cyan);
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-stat-item .stat-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.01em;
        }

        .hero-stat-item .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            max-width: 110px;
            line-height: 1.3;
        }

        .hero-demo-panel {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card), var(--shadow-glow);
            position: relative;
            overflow: hidden;
        }

        .hero-demo-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan), var(--accent-blue));
        }

        .hero-demo-panel .demo-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-demo-panel .demo-title i {
            color: var(--accent-cyan);
        }

        .demo-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .demo-mini-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            transition: all var(--transition);
        }

        .demo-mini-card:hover {
            border-color: var(--border-glow);
            background: rgba(0, 240, 255, 0.05);
        }

        .demo-mini-card .demo-mini-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-muted);
            margin-bottom: 5px;
        }

        .demo-mini-card .demo-mini-value {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-cyan);
        }

        /* ===== SECTION COMMON ===== */
        .section {
            padding: 70px 0;
            position: relative;
        }

        .section-alt {
            background: var(--bg-secondary);
        }

        .section-heading {
            margin-bottom: 44px;
        }

        .section-heading .section-kicker {
            display: inline-block;
            color: var(--accent-cyan);
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
        }

        .section-heading h2 {
            color: var(--text-white);
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.015em;
            line-height: 1.25;
            margin-bottom: 10px;
        }

        .section-heading .section-desc {
            color: var(--text-muted);
            font-size: 1.02rem;
            max-width: 620px;
            line-height: 1.6;
        }

        /* ===== GLASS CARDS ===== */
        .glass-card {
            background: rgba(13, 17, 30, 0.65);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .glass-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow), 0 8px 32px rgba(0, 0, 0, 0.4);
            transform: translateY(-3px);
        }

        .glass-card .glass-card-icon {
            width: 46px;
            height: 46px;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .glass-card h3 {
            color: var(--text-white);
            font-size: 1.12rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .glass-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== STRATEGY TABLE ===== */
        .strategy-table-wrap {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .strategy-table {
            margin-bottom: 0;
            color: var(--text-silver);
            font-size: 0.9rem;
        }

        .strategy-table thead {
            background: rgba(0, 240, 255, 0.06);
            border-bottom: 1px solid var(--border-glow);
        }

        .strategy-table thead th {
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 0.82rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            padding: 16px 20px;
            border: none;
        }

        .strategy-table tbody tr {
            border-bottom: 1px solid rgba(148, 163, 184, 0.08);
            transition: background var(--transition);
        }

        .strategy-table tbody tr:last-child {
            border-bottom: none;
        }

        .strategy-table tbody tr:hover {
            background: rgba(0, 240, 255, 0.04);
        }

        .strategy-table tbody td {
            padding: 16px 20px;
            border: none;
            vertical-align: middle;
        }

        .strategy-name-cell {
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .risk-badge {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 50px;
            letter-spacing: 0.03em;
        }

        .risk-low {
            background: rgba(34, 197, 94, 0.12);
            color: #4ade80;
            border: 1px solid rgba(34, 197, 94, 0.3);
        }

        .risk-medium {
            background: rgba(251, 191, 36, 0.12);
            color: #fbbf24;
            border: 1px solid rgba(251, 191, 36, 0.3);
        }

        .risk-high {
            background: rgba(239, 68, 68, 0.12);
            color: #f87171;
            border: 1px solid rgba(239, 68, 68, 0.3);
        }

        /* ===== SCENARIO / TIMELINE ===== */
        .scenario-timeline {
            position: relative;
            padding-left: 32px;
        }

        .scenario-timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--accent-cyan), rgba(0, 240, 255, 0.1));
        }

        .scenario-item {
            position: relative;
            margin-bottom: 28px;
            padding-left: 12px;
        }

        .scenario-item:last-child {
            margin-bottom: 0;
        }

        .scenario-item::before {
            content: '';
            position: absolute;
            left: -27px;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.55);
            border: 2px solid var(--bg-primary);
        }

        .scenario-item .scenario-label {
            font-size: 0.72rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-cyan);
            margin-bottom: 4px;
        }

        .scenario-item h4 {
            color: var(--text-white);
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .scenario-item p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== EVIDENCE / STATS ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .stats-card {
            background: rgba(13, 17, 30, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: left;
            transition: all var(--transition);
        }

        .stats-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }

        .stats-card .stats-number {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }

        .stats-card .stats-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.35;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-primary) 0%, #0A1428 50%, var(--bg-primary) 100%);
            border-top: 1px solid var(--border-glow);
            border-bottom: 1px solid var(--border-glow);
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.1rem;
            font-weight: 800;
            letter-spacing: -0.015em;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }

        .cta-section .cta-desc {
            color: var(--text-silver);
            font-size: 1.05rem;
            max-width: 520px;
            line-height: 1.6;
            margin-bottom: 28px;
            position: relative;
            z-index: 2;
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            background: rgba(13, 17, 30, 0.6);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-accordion .accordion-item:hover {
            border-color: var(--border-glow);
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.98rem;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: all var(--transition);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.06);
            color: var(--accent-cyan);
            box-shadow: inset 0 -1px 0 var(--border-glow);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px var(--accent-glow);
            border-color: var(--accent-cyan);
        }

        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300F0FF'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .faq-accordion .accordion-body {
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 16px 22px 20px;
            line-height: 1.65;
        }

        /* ===== FAB ===== */
        .fab-floating {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.7), rgba(8, 9, 15, 0.7)), linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: padding-box, border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.3rem;
            cursor: pointer;
            opacity: 0.65;
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.3);
            transition: all var(--transition);
            animation: fab-breathe 2.8s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.65; box-shadow: 0 0 16px rgba(0, 240, 255, 0.3); }
            50% { opacity: 0.9; box-shadow: 0 0 28px rgba(0, 240, 255, 0.5); }
        }

        .fab-floating:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 36px rgba(0, 240, 255, 0.55);
            animation-play-state: paused;
        }

        .fab-floating:active {
            transform: scale(0.92);
        }

        .fab-floating .fab-notify {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            background: #ff007f;
            border-radius: 50%;
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.7);
            animation: fab-blink 1.2s infinite;
        }

        @keyframes fab-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.35; }
        }

        /* ===== FOOTER ===== */
        .main-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            padding: 56px 0 28px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--text-white);
            margin-bottom: 14px;
        }

        .footer-brand .footer-highlight {
            color: var(--accent-cyan);
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.65;
            max-width: 400px;
        }

        .footer-title {
            color: var(--text-white);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 9px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: all var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(148, 163, 184, 0.1);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
        }

        .footer-copyright {
            color: var(--text-muted);
            font-size: 0.82rem;
        }

        .footer-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        .footer-badges span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.75rem;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-subtle);
            padding: 5px 12px;
            border-radius: 50px;
        }

        .footer-badges i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-advanced h1 {
                font-size: 2.3rem;
            }
        }

        @media (max-width: 768px) {
            .hero-advanced {
                padding: 120px 0 60px;
            }
            .hero-advanced h1 {
                font-size: 1.9rem;
            }
            .hero-advanced .hero-desc {
                font-size: 1rem;
            }
            .hero-demo-panel {
                margin-top: 28px;
            }
            .section {
                padding: 50px 0;
            }
            .section-heading h2 {
                font-size: 1.6rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .strategy-table thead {
                display: none;
            }
            .strategy-table tbody tr {
                display: block;
                margin-bottom: 12px;
                border: 1px solid var(--border-subtle);
                border-radius: var(--radius-sm);
                padding: 10px;
            }
            .strategy-table tbody td {
                display: flex;
                justify-content: space-between;
                align-items: center;
                padding: 8px 12px;
                border: none;
                gap: 8px;
            }
            .strategy-table tbody td::before {
                content: attr(data-label);
                font-weight: 700;
                color: var(--text-white);
                font-size: 0.78rem;
                margin-right: 8px;
                white-space: nowrap;
            }
            .navbar-collapse {
                background: rgba(8, 9, 15, 0.97);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--border-subtle);
            }
            .navbar-nav .nav-link {
                padding: 10px 14px !important;
            }
            .nav-login, .nav-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .hero-advanced h1 {
                font-size: 1.55rem;
                line-height: 1.25;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-glow-primary, .btn-outline-glow {
                justify-content: center;
                width: 100%;
            }
            .hero-stats {
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .demo-grid {
                grid-template-columns: 1fr;
            }
            .section-heading h2 {
                font-size: 1.4rem;
            }
            .fab-floating {
                width: 46px;
                height: 46px;
                font-size: 1.1rem;
                left: 12px;
                bottom: 80px;
            }
            .navbar-brand {
                font-size: 1.05rem;
            }
            .nav-signup {
                padding: 8px 14px;
            }
        }