/* roulang page: index */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --border-radius: 12px;
            --shadow-glow: 0 0 20px rgba(255, 69, 0, 0.4);
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.5);
            --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 clamp(1rem, 5vw, 2rem);
        }
        /* Navbar */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 11, 11, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.15);
            padding: 0.8rem 0;
            transition: var(--transition-base);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            max-width: 320px;
            white-space: nowrap;
        }
        .logo span {
            color: var(--accent-primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-links a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 0.4rem 0;
            position: relative;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-primary);
        }
        .nav-links a.active {
            border-bottom-color: var(--accent-primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .btn-login {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #FFFFFF;
            padding: 0.5rem 1.25rem;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 0.9rem;
        }
        .btn-login:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: #FFFFFF;
            padding: 0.5rem 1.5rem;
            border-radius: 30px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            box-shadow: var(--shadow-glow);
            font-size: 0.9rem;
        }
        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 30px rgba(255, 69, 0, 0.6);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: #FFFFFF;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                flex-direction: column;
                padding: 1.5rem;
                gap: 1.5rem;
                backdrop-filter: blur(12px);
                border-bottom: 1px solid rgba(255, 69, 0, 0.2);
            }
            .nav-links.show {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .logo {
                font-size: 1rem;
                max-width: 220px;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-lava: #FF4500;
            --accent-fire: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --border-subtle: rgba(255, 69, 0, 0.15);
            --shadow-lava: 0 0 15px rgba(255, 69, 0, 0.3);
            --shadow-fire: 0 4px 20px rgba(255, 0, 0, 0.2);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
        }

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

        body {
            font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 50;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: all 0.3s ease;
        }

        .navbar .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-white);
            text-decoration: none;
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo-text i {
            color: var(--accent-lava);
            font-size: 1.4rem;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 6px;
            align-items: center;
        }

        .nav-links a {
            color: var(--text-warm-gray);
            text-decoration: none;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-lava);
            background: rgba(255, 69, 0, 0.08);
        }

        .nav-auth {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--text-warm-gray);
            color: var(--text-white);
            padding: 8px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s;
        }

        .btn-login:hover {
            border-color: var(--accent-lava);
            color: var(--accent-lava);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lava), var(--accent-fire));
            border: none;
            color: white;
            padding: 8px 22px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: var(--shadow-lava);
            transition: all 0.25s;
        }

        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(255, 69, 0, 0.55);
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.6rem;
            cursor: pointer;
        }

        /* Article Hero */
        .article-hero {
            margin-top: 68px;
            background: linear-gradient(180deg, rgba(255,69,0,0.06) 0%, transparent 100%);
            border-bottom: 1px solid var(--border-subtle);
            padding: 48px 0 40px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            color: var(--text-warm-gray);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .article-meta .category-tag {
            background: rgba(255,69,0,0.15);
            color: var(--accent-lava);
            padding: 4px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }

        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            color: var(--text-white);
        }

        .article-hero .pull-quote {
            font-size: 1.2rem;
            color: var(--text-warm-gray);
            border-left: 4px solid var(--accent-lava);
            padding-left: 24px;
            font-style: italic;
            max-width: 720px;
            line-height: 1.6;
        }

        /* Article Content */
        .article-content-area {
            padding: 56px 0 48px;
            max-width: 820px;
            margin: 0 auto;
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.7;
            color: #E0E0E0;
        }

        .article-body h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: white;
            letter-spacing: -0.01em;
        }

        .article-body h3 {
            font-size: 1.45rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--text-white);
        }

        .article-body p {
            margin-bottom: 16px;
        }

        .article-body a {
            color: var(--accent-lava);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            margin: 24px auto;
            display: block;
            box-shadow: 0 8px 30px rgba(0,0,0,0.4);
        }

        .article-body ul, .article-body ol {
            margin: 16px 0 24px 20px;
            color: var(--text-warm-gray);
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .not-found-msg {
            text-align: center;
            padding: 80px 20px;
            color: var(--text-warm-gray);
        }

        .not-found-msg h2 {
            font-size: 2rem;
            color: white;
            margin-bottom: 12px;
        }

        .btn-back-home {
            display: inline-block;
            margin-top: 24px;
            background: var(--accent-lava);
            color: white;
            padding: 12px 32px;
            border-radius: 8px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s;
        }

        .btn-back-home:hover {
            background: #FF5722;
            box-shadow: var(--shadow-lava);
        }

        /* Footer */
        footer {
            background: #0A0A0A;
            border-top: 1px solid rgba(255,69,0,0.1);
            padding: 48px 0 32px;
        }

        footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.2fr;
            gap: 40px;
        }

        footer h4 {
            font-weight: 700;
            color: white;
            margin-bottom: 16px;
            font-size: 1.1rem;
        }

        footer p, footer li {
            color: #999;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        footer a {
            color: #999;
            text-decoration: none;
            transition: color 0.2s;
        }

        footer a:hover {
            color: var(--accent-lava);
        }

        footer .badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            font-size: 1.4rem;
            color: #777;
        }

        footer .copyright {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
            text-align: center;
            font-size: 0.8rem;
            color: #666;
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 52px;
            height: 52px;
            background: rgba(11,11,11,0.7);
            backdrop-filter: blur(12px);
            border-radius: 50px;
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(255,69,0,0.35);
            transition: all 0.3s ease;
            animation: fabPulse 3s infinite;
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50px;
            padding: 2px;
            background: linear-gradient(135deg, #FF4500, #FF0000);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
        }

        .fab:hover {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(255,69,0,0.7);
            animation: none;
        }

        @keyframes fabPulse {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 1; }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-hero h1 {
                font-size: 2rem;
            }
            footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(11,11,11,0.97);
                flex-direction: column;
                padding: 20px;
                gap: 4px;
                display: none;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.show {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .nav-auth {
                gap: 6px;
            }
            .btn-login, .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-content-area {
                padding: 40px 0;
            }
            footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-jet: #0B0B0B;
            --bg-charcoal: #161616;
            --accent-lava: #FF4500;
            --accent-fire: #FF0000;
            --text-soft: #FFFFFF;
            --text-warm: #CCCCCC;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-glow: 0 0 25px rgba(255, 69, 0, 0.3);
            --shadow-neon: 0 0 40px rgba(255, 69, 0, 0.6);
        }

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

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

        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-jet);
            color: var(--text-warm);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

        button,
        .btn {
            cursor: pointer;
            border: none;
            outline: none;
            transition: all 0.3s ease;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.1);
            transition: all 0.3s ease;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            flex-wrap: nowrap;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-soft);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo i {
            color: var(--accent-lava);
            font-size: 1.6rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-warm);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 6px 0;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-lava), var(--accent-fire));
            transition: width 0.3s ease;
            border-radius: 2px;
        }

        .nav-links a:hover {
            color: var(--text-soft);
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--accent-lava);
            font-weight: 700;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-login {
            background: transparent;
            color: var(--text-soft);
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
        }

        .btn-login:hover {
            border-color: var(--accent-lava);
            color: var(--accent-lava);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-lava), var(--accent-fire));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(255, 69, 0, 0.3);
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            box-shadow: 0 6px 25px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
        }

        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            color: var(--text-soft);
            cursor: pointer;
        }

        /* Hero Video Section */
        .hero-video {
            position: relative;
            width: 100%;
            height: 85vh;
            min-height: 600px;
            overflow: hidden;
            margin-top: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-video-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
            filter: brightness(0.3) saturate(1.2);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 11, 11, 0.7) 0%, rgba(11, 11, 11, 0.5) 50%, rgba(11, 11, 11, 0.9) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 40px 24px;
            max-width: 900px;
            animation: float 3s ease-in-out infinite;
        }

        .hero-play-btn {
            width: 90px;
            height: 90px;
            background: linear-gradient(135deg, var(--accent-lava), var(--accent-fire));
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            color: #fff;
            box-shadow: var(--shadow-neon);
            transition: all 0.3s ease;
            margin-bottom: 28px;
            cursor: pointer;
        }

        .hero-play-btn:hover {
            transform: scale(1.08);
            box-shadow: 0 0 60px rgba(255, 69, 0, 0.9);
        }

        .hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 900;
            color: var(--text-soft);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--accent-lava), var(--accent-fire));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 1.15rem;
            color: var(--text-warm);
            max-width: 700px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--accent-lava), var(--accent-fire));
            color: #fff;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
        }

        .hero-cta:hover {
            box-shadow: 0 0 45px rgba(255, 69, 0, 0.7);
            transform: translateY(-3px);
        }

        /* Section Base */
        section {
            padding: 80px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--accent-lava);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 900;
            color: var(--text-soft);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-warm);
            max-width: 750px;
            line-height: 1.65;
        }

        /* Strategy Cards */
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
            margin-top: 48px;
        }

        .strategy-card {
            background: var(--bg-charcoal);
            border: 1px solid rgba(255, 69, 0, 0.08);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .strategy-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-lava), var(--accent-fire));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

        .strategy-card:hover::before {
            transform: scaleX(1);
        }

        .strategy-card:hover {
            border-color: rgba(255, 69, 0, 0.3);
            box-shadow: 0 10px 30px rgba(255, 69, 0, 0.08);
            transform: translateY(-4px);
        }

        .strategy-icon {
            font-size: 2.8rem;
            color: var(--accent-lava);
            margin-bottom: 18px;
        }

        .strategy-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-soft);
            margin-bottom: 10px;
        }

        .strategy-card p {
            font-size: 0.95rem;
            color: var(--text-warm);
            line-height: 1.6;
        }

        /* Pain Points Section */
        .pain-solution {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-top: 48px;
        }

        .pain-box {
            background: var(--bg-charcoal);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            border-left: 4px solid var(--accent-fire);
        }

        .pain-box h3 {
            color: var(--accent-fire);
            font-weight: 800;
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .pain-box ul {
            list-style: none;
            padding: 0;
        }

        .pain-box li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-warm);
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .pain-box li i {
            color: var(--accent-fire);
        }

        .solution-box {
            background: var(--bg-charcoal);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            border-left: 4px solid var(--accent-lava);
        }

        .solution-box h3 {
            color: var(--accent-lava);
            font-weight: 800;
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .solution-box ul {
            list-style: none;
            padding: 0;
        }

        .solution-box li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-warm);
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .solution-box li i {
            color: var(--accent-lava);
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .testimonial-card {
            background: var(--bg-charcoal);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid rgba(255, 69, 0, 0.06);
        }

        .testimonial-card .stars {
            color: var(--accent-lava);
            margin-bottom: 12px;
            font-size: 1rem;
        }

        .testimonial-card p {
            font-size: 0.95rem;
            color: var(--text-warm);
            line-height: 1.6;
            font-style: italic;
        }

        .testimonial-card .author {
            margin-top: 16px;
            font-weight: 700;
            color: var(--text-soft);
            font-size: 0.9rem;
        }

        .testimonial-card .jackpot {
            color: var(--accent-lava);
            font-weight: 800;
            font-size: 0.85rem;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(22, 22, 22, 0.98), rgba(11, 11, 11, 0.98));
            border: 1px solid rgba(255, 69, 0, 0.15);
            border-radius: var(--radius-lg);
            padding: 56px 32px;
            text-align: center;
            box-shadow: inset 0 0 60px rgba(255, 69, 0, 0.03);
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 900;
            color: var(--text-soft);
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-warm);
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--accent-lava), var(--accent-fire));
            color: #fff;
            padding: 18px 40px;
            border-radius: 50px;
            font-weight: 800;
            font-size: 1.15rem;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
            animation: glow-pulse 2s ease-in-out infinite;
        }

        .cta-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 0 55px rgba(255, 69, 0, 0.8);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 999;
            width: 56px;
            height: 56px;
            background: rgba(11, 11, 11, 0.75);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, var(--accent-lava), var(--accent-fire)) 1;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-lava);
            box-shadow: 0 0 18px rgba(255, 69, 0, 0.4);
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .fab-left:hover {
            box-shadow: 0 0 35px rgba(255, 69, 0, 0.75);
            transform: scale(1.1);
            color: #fff;
        }

        .fab-left .notification-dot {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 12px;
            height: 12px;
            background: var(--accent-lava);
            border-radius: 50%;
            animation: glow-pulse 1.5s ease-in-out infinite;
        }

        /* Footer */
        footer {
            background: var(--bg-jet);
            border-top: 1px solid rgba(255, 69, 0, 0.08);
            padding: 60px 0 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 36px;
        }

        .footer-col h4 {
            font-weight: 700;
            color: var(--text-soft);
            margin-bottom: 16px;
        }

        .footer-col p,
        .footer-col li {
            font-size: 0.9rem;
            color: var(--text-warm);
            line-height: 1.7;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

        .footer-col li {
            margin-bottom: 8px;
        }

        .footer-col a:hover {
            color: var(--accent-lava);
        }

        .footer-bottom {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-warm);
        }

        .badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.8rem;
            margin-top: 12px;
        }

        .badge-row span {
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 12px;
            border-radius: 6px;
            font-weight: 600;
            color: var(--text-warm);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .pain-solution {
                grid-template-columns: 1fr;
            }

            .hero-video {
                height: 70vh;
                min-height: 500px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(11, 11, 11, 0.98);
                flex-direction: column;
                padding: 24px;
                gap: 20px;
                display: none;
                border-bottom: 2px solid var(--accent-lava);
            }

            .nav-links.open {
                display: flex;
            }

            .mobile-toggle {
                display: block;
            }

            .nav-actions {
                gap: 8px;
            }

            .btn-login,
            .btn-signup {
                padding: 8px 14px;
                font-size: 0.8rem;
            }

            .hero h1 {
                font-size: 1.9rem;
            }

            .hero-play-btn {
                width: 70px;
                height: 70px;
                font-size: 2rem;
            }

            section {
                padding: 50px 0;
            }

            .strategy-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero-video {
                height: 60vh;
                min-height: 400px;
            }

            .hero h1 {
                font-size: 1.6rem;
            }

            .hero p {
                font-size: 0.95rem;
            }

            .hero-cta,
            .cta-btn {
                padding: 14px 28px;
                font-size: 1rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-lava: #FF4500;
            --accent-fire: #FF0000;
            --text-white: #FFFFFF;
            --text-warm: #CCCCCC;
            --border-dim: rgba(255, 69, 0, 0.1);
            --shadow-lava: 0 4px 20px rgba(255, 69, 0, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            background-color: var(--bg-primary);
            color: var(--text-warm);
            -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-fast);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition-smooth);
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .bg-jet {
            background-color: var(--bg-primary);
        }

        .border-lava\/10 {
            border-color: var(--border-dim);
        }

        .text-warm-gray {
            color: var(--text-warm);
        }

        .text-lava {
            color: var(--accent-lava);
        }

        /* Header & Navigation */
        header {
            position: sticky;
            top: 0;
            z-index: 50;
            background-color: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-dim);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo i {
            color: var(--accent-lava);
            font-size: 1.75rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 1.75rem;
            list-style: none;
            flex-wrap: wrap;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-warm);
            padding: 0.4rem 0;
            position: relative;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-lava);
            transition: width var(--transition-smooth);
            border-radius: 1px;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-white);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-text {
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-text:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        .btn-solid {
            background: linear-gradient(135deg, var(--accent-lava) 0%, #FF5722 100%);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.55rem 1.5rem;
            border-radius: 50px;
            box-shadow: var(--shadow-lava);
        }

        .btn-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.4);
        }

        .btn-solid:active {
            transform: translateY(0);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.75rem;
            padding: 0.25rem;
            line-height: 1;
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 1.25rem;
            }
            .logo {
                font-size: 1.25rem;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                padding: 1rem 1.5rem;
                gap: 0.5rem;
                margin-top: 0.75rem;
                border-radius: var(--radius-md);
                border: 1px solid var(--border-dim);
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links a {
                padding: 0.65rem 0;
                font-size: 1.05rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-actions {
                margin-left: auto;
            }
        }

        @media (max-width: 520px) {
            .logo span {
                font-size: 1rem;
            }
            .btn-text,
            .btn-solid {
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }
            .nav-actions {
                gap: 0.5rem;
            }
        }

        /* Page Banner */
        .page-banner {
            background: linear-gradient(135deg, #1C0A00 0%, #0F0500 50%, #1A0800 100%);
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 5rem 0 4rem;
            position: relative;
            border-bottom: 1px solid var(--border-dim);
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 40%, rgba(255, 69, 0, 0.12) 0%, transparent 55%);
            pointer-events: none;
        }

        .banner-content {
            position: relative;
            z-index: 2;
            text-align: left;
            max-width: 750px;
        }

        .banner-badge {
            display: inline-block;
            background: rgba(255, 69, 0, 0.15);
            color: var(--accent-lava);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 0.35rem 1rem;
            border-radius: 50px;
            border: 1px solid rgba(255, 69, 0, 0.3);
            margin-bottom: 1.25rem;
            letter-spacing: 0.3px;
        }

        .banner-content h1 {
            font-size: 2.85rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        .banner-content p {
            font-size: 1.15rem;
            color: #CCCCCC;
            max-width: 600px;
            line-height: 1.65;
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 3.5rem 0 2.5rem;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .banner-content p {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 1.7rem;
            }
            .banner-content p {
                font-size: 0.95rem;
            }
        }

        /* Section Styles */
        section {
            padding: 3.5rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
            text-align: left;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: #AAAAAA;
            margin-bottom: 2.5rem;
            text-align: left;
            max-width: 680px;
        }

        /* Tip Cards */
        .tip-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.75rem;
        }

        .tip-card {
            background: #1A1A1A;
            border: 1px solid #2A2A2A;
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            transition: all var(--transition-smooth);
            position: relative;
            text-align: left;
        }

        .tip-card:hover {
            border-color: var(--accent-lava);
            box-shadow: 0 8px 28px rgba(255, 69, 0, 0.12);
            transform: translateY(-3px);
        }

        .tip-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: var(--accent-lava);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            border-radius: 12px;
            margin-bottom: 1.25rem;
        }

        .tip-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.65rem;
        }

        .tip-card p {
            color: #BBBBBB;
            font-size: 0.98rem;
            line-height: 1.6;
        }

        /* Highlight Box */
        .highlight-box {
            background: linear-gradient(135deg, #1F0A02 0%, #120500 100%);
            border: 1px solid rgba(255, 69, 0, 0.25);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            align-items: center;
            justify-content: space-between;
            margin: 2rem 0;
        }

        .highlight-text h3 {
            font-size: 1.7rem;
            font-weight: 800;
            color: #fff;
        }

        .highlight-text p {
            color: #CCCCCC;
            margin-top: 0.5rem;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: #1A1A1A;
            border: 1px solid #2A2A2A;
            border-radius: var(--radius-md);
            padding: 1.35rem 1.75rem;
            text-align: left;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #555;
        }

        .faq-item h4 {
            font-weight: 700;
            color: #fff;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-item p {
            color: #BBBBBB;
            margin-top: 0.65rem;
            font-size: 0.95rem;
            display: none;
        }

        .faq-item.open p {
            display: block;
        }

        .faq-item.open {
            border-color: var(--accent-lava);
            background: #211110;
        }

        /* CTA Block */
        .cta-block {
            background: linear-gradient(135deg, #2A0C04 0%, #170400 100%);
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            text-align: left;
            border: 1px solid rgba(255, 69, 0, 0.2);
        }

        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
        }

        .cta-block p {
            color: #CCCCCC;
            margin: 0.75rem 0 1.75rem;
            max-width: 600px;
        }

        .btn-cta-large {
            display: inline-block;
            background: var(--accent-lava);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            padding: 0.85rem 2.25rem;
            border-radius: 50px;
            box-shadow: var(--shadow-lava);
        }

        .btn-cta-large:hover {
            background: #FF5722;
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(255, 69, 0, 0.45);
        }

        /* Footer */
        footer {
            background-color: #0A0A0A;
            border-top: 1px solid rgba(255, 69, 0, 0.1);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            background: rgba(11, 11, 11, 0.75);
            backdrop-filter: blur(12px);
            border: 1.5px solid transparent;
            border-image: linear-gradient(135deg, #FF4500, #FF0000) 1;
            width: 56px;
            height: 56px;
            border-radius: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FF4500;
            font-size: 1.6rem;
            box-shadow: 0 0 16px rgba(255, 69, 0, 0.5);
            animation: floatGlow 2.5s infinite ease-in-out;
            transition: all 0.3s;
        }

        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(255, 69, 0, 0.75);
        }

        @keyframes floatGlow {
            0% { box-shadow: 0 0 12px rgba(255, 69, 0, 0.4); }
            50% { box-shadow: 0 0 26px rgba(255, 69, 0, 0.65); }
            100% { box-shadow: 0 0 12px rgba(255, 69, 0, 0.4); }
        }

        @media (max-width: 520px) {
            .fab-left {
                width: 50px;
                height: 50px;
                left: 1rem;
                bottom: 5rem;
            }
        }