/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.75);
            --bg-glass: rgba(13, 17, 30, 0.55);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-gold: #FFD700;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glow: rgba(0, 240, 255, 0.25);
            --border-soft: rgba(203, 213, 225, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-elevated: 0 16px 48px rgba(0, 0, 0, 0.6);
            --spacing-section: 80px;
            --spacing-mobile: 48px;
            --font-display: 'Be Vietnam Pro', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Be Vietnam Pro', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-display);
            color: var(--text-primary);
            line-height: 1.25;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        h1 {
            font-size: clamp(2rem, 5vw, 3.25rem);
            font-weight: 800;
            letter-spacing: -0.02em;
        }

        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.25rem);
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        h3 {
            font-size: clamp(1.1rem, 2.5vw, 1.45rem);
            font-weight: 600;
        }

        p {
            margin-bottom: 1rem;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover, a:focus {
            color: var(--accent-gold);
            text-decoration: none;
        }

        a:focus-visible, button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding-top: var(--spacing-section);
            padding-bottom: var(--spacing-section);
        }

        @media (max-width: 768px) {
            .section-padding {
                padding-top: var(--spacing-mobile);
                padding-bottom: var(--spacing-mobile);
            }
        }

        /* ===== NAVBAR ===== */
        .site-navbar {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-soft);
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: background 0.3s ease;
        }

        .navbar-brand-custom {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 280px;
        }

        .navbar-brand-custom:hover, .navbar-brand-custom:focus {
            color: var(--accent-cyan);
        }

        .navbar-brand-custom .brand-icon {
            color: var(--accent-cyan);
            margin-right: 8px;
            font-size: 1.3rem;
        }

        .nav-link-custom {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 14px !important;
            border-radius: 8px;
            transition: color 0.2s ease, background 0.2s ease;
            position: relative;
        }

        .nav-link-custom:hover, .nav-link-custom:focus {
            color: var(--text-primary) !important;
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-link-custom.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.12);
        }

        .nav-auth-group {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: 12px;
        }

        .btn-login-text {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 12px;
            background: transparent;
            border: none;
            border-radius: 8px;
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .btn-login-text:hover {
            color: var(--text-primary);
            background: rgba(203, 213, 225, 0.08);
        }

        .btn-signup-solid {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 10px 20px;
            border: none;
            border-radius: 10px;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.35);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            white-space: nowrap;
        }

        .btn-signup-solid:hover, .btn-signup-solid:focus {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 82, 255, 0.5);
            color: #fff;
        }

        .navbar-toggler-custom {
            border: 1px solid var(--border-soft);
            border-radius: 8px;
            padding: 8px 10px;
            background: transparent;
            color: var(--text-secondary);
            transition: background 0.2s ease, color 0.2s ease;
        }

        .navbar-toggler-custom:hover {
            background: rgba(0, 240, 255, 0.08);
            color: var(--text-primary);
        }

        @media (max-width: 991.98px) {
            .nav-auth-group {
                margin-left: 0;
                margin-top: 12px;
                padding-top: 12px;
                border-top: 1px solid var(--border-soft);
                width: 100%;
                justify-content: flex-start;
            }
            .navbar-collapse {
                padding-top: 12px;
            }
        }

        /* ===== HERO (众筹预热样式) ===== */
        .hero-section {
            position: relative;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            background-attachment: fixed;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding: 80px 0;
            isolation: isolate;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(8, 9, 15, 0.92) 0%, rgba(13, 17, 30, 0.82) 55%, rgba(8, 9, 15, 0.95) 100%);
            z-index: -1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 25% 35%, rgba(0, 82, 255, 0.18) 0%, transparent 45%),
                        radial-gradient(circle at 80% 70%, rgba(0, 240, 255, 0.12) 0%, transparent 40%);
            z-index: -1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .hero-description {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .btn-primary-glow {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 28px;
            border: none;
            border-radius: 12px;
            box-shadow: 0 6px 24px rgba(0, 82, 255, 0.4);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .btn-primary-glow:hover, .btn-primary-glow:focus {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(0, 82, 255, 0.6);
            color: #fff;
        }

        .btn-outline-glow {
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border: 1.5px solid rgba(0, 240, 255, 0.45);
            border-radius: 12px;
            transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .btn-outline-glow:hover, .btn-outline-glow:focus {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-gold);
            border-color: var(--accent-gold);
        }

        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .progress-ring-panel {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
            text-align: center;
        }

        .progress-ring-wrap {
            position: relative;
            width: 160px;
            height: 160px;
            margin: 0 auto 20px;
        }

        .progress-ring {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }

        .progress-ring-bg {
            fill: none;
            stroke: rgba(203, 213, 225, 0.1);
            stroke-width: 10;
        }

        .progress-ring-fill {
            fill: none;
            stroke: url(#ringGradient);
            stroke-width: 10;
            stroke-linecap: round;
            stroke-dasharray: 440;
            stroke-dashoffset: 110;
            transition: stroke-dashoffset 1.5s ease;
        }

        .progress-ring-center {
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .progress-ring-percent {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
        }

        .progress-ring-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .tier-preview-list {
            list-style: none;
            margin: 20px 0 0;
            padding: 0;
            text-align: left;
        }

        .tier-preview-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-soft);
            font-size: 0.9rem;
        }

        .tier-preview-item:last-child {
            border-bottom: none;
        }

        .tier-name {
            color: var(--text-primary);
            font-weight: 600;
        }

        .tier-reward {
            color: var(--accent-gold);
            font-weight: 700;
        }

        @media (max-width: 991.98px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-section {
                background-attachment: scroll;
                padding: 60px 0;
                min-height: auto;
            }
        }

        /* ===== 直播预告 ===== */
        .live-preview-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
            padding: 48px 0;
        }

        .live-preview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .live-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 0, 0, 0.15);
            color: #ff5555;
            font-weight: 700;
            font-size: 0.8rem;
            padding: 6px 14px;
            border-radius: 50px;
            letter-spacing: 0.5px;
        }

        .live-dot {
            width: 8px;
            height: 8px;
            background: #ff3333;
            border-radius: 50%;
            animation: pulse-dot 1.5s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.4); }
        }

        .live-countdown {
            display: flex;
            gap: 16px;
            margin-top: 16px;
        }

        .countdown-block {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            text-align: center;
            min-width: 70px;
        }

        .countdown-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
        }

        .countdown-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .live-cover-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-elevated);
            aspect-ratio: 16/9;
        }

        .live-cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .live-cover-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(8,9,15,0.85) 0%, transparent 55%);
            display: flex;
            align-items: flex-end;
            padding: 24px;
        }

        @media (max-width: 768px) {
            .live-preview-grid {
                grid-template-columns: 1fr;
            }
            .countdown-block {
                min-width: 56px;
                padding: 10px 12px;
            }
            .countdown-value {
                font-size: 1.2rem;
            }
        }

        /* ===== 看点列表 ===== */
        .highlights-section {
            background: var(--bg-primary);
        }

        .highlight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 32px;
        }

        .highlight-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
            position: relative;
            overflow: hidden;
        }

        .highlight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(0, 240, 255, 0.3);
        }

        .highlight-card-icon {
            font-size: 1.8rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
        }

        .highlight-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

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

        @media (max-width: 991.98px) {
            .highlight-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 576px) {
            .highlight-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 资讯/排行榜 ===== */
        .news-section {
            background: var(--bg-secondary);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 32px;
            margin-top: 32px;
        }

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

        .news-list-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-soft);
            transition: background 0.2s ease;
            border-radius: 8px;
        }

        .news-list-item:hover {
            background: rgba(0, 240, 255, 0.04);
            padding-left: 8px;
        }

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

        .news-date-badge {
            background: rgba(0, 82, 255, 0.12);
            color: var(--accent-cyan);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
            white-space: nowrap;
            min-width: 80px;
            text-align: center;
        }

        .news-item-content {
            flex: 1;
        }

        .news-item-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .news-item-title a {
            color: var(--text-primary);
        }

        .news-item-title a:hover {
            color: var(--accent-cyan);
        }

        .news-item-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-item-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .ranking-panel {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .ranking-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .ranking-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-soft);
        }

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

        .ranking-number {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--accent-gold);
            min-width: 32px;
        }

        .ranking-name {
            flex: 1;
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .ranking-metric {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
        }

        .trend-up {
            color: #4ade80;
        }

        .trend-hot {
            color: #ff5555;
        }

        @media (max-width: 991.98px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 会员权益 ===== */
        .membership-section {
            background: var(--bg-primary);
        }

        .membership-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 32px;
        }

        .membership-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: transform 0.25s ease, border-color 0.25s ease;
            text-align: left;
        }

        .membership-card:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 240, 255, 0.3);
        }

        .membership-level {
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            color: var(--accent-gold);
            margin-bottom: 8px;
        }

        .membership-card h3 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }

        .membership-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .membership-benefit {
            font-size: 0.82rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 6px;
        }

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

        .membership-cta-wrap {
            margin-top: 32px;
            text-align: left;
        }

        @media (max-width: 991.98px) {
            .membership-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 576px) {
            .membership-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 片库轨道 ===== */
        .track-section {
            background: var(--bg-secondary);
        }

        .track-scroll-wrap {
            position: relative;
            overflow: hidden;
            margin-top: 32px;
        }

        .track-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding-bottom: 16px;
            scrollbar-width: thin;
            scrollbar-color: rgba(0, 240, 255, 0.3) transparent;
        }

        .track-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .track-scroll::-webkit-scrollbar-track {
            background: transparent;
        }

        .track-scroll::-webkit-scrollbar-thumb {
            background: rgba(0, 240, 255, 0.3);
            border-radius: 10px;
        }

        .track-card {
            flex: 0 0 240px;
            scroll-snap-align: start;
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            aspect-ratio: 3/4;
        }

        .track-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-elevated);
        }

        .track-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .track-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(8,9,15,0.9) 0%, transparent 55%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 18px;
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .track-card:hover .track-card-overlay {
            opacity: 1;
        }

        .track-card-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .track-card-cta {
            font-size: 0.78rem;
            color: var(--accent-cyan);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        @media (max-width: 576px) {
            .track-card {
                flex: 0 0 180px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-primary);
        }

        .faq-list {
            max-width: 820px;
            margin-top: 32px;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.25);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            text-align: left;
            cursor: pointer;
            transition: color 0.2s ease;
            font-family: var(--font-body);
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-question i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
            transition: transform 0.3s ease;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.7;
        }

        .faq-answer.open {
            max-height: 400px;
            padding: 0 24px 18px;
        }

        /* ===== CTA / 提醒订阅 ===== */
        .reminder-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }

        .reminder-panel {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12), rgba(0, 240, 255, 0.06));
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            box-shadow: var(--shadow-card);
            text-align: left;
        }

        .reminder-form {
            display: flex;
            gap: 12px;
            margin-top: 20px;
            max-width: 500px;
        }

        .reminder-input {
            flex: 1;
            background: rgba(8, 9, 15, 0.7);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            padding: 12px 16px;
            color: var(--text-primary);
            font-size: 0.95rem;
            font-family: var(--font-body);
            transition: border-color 0.2s ease;
        }

        .reminder-input:focus {
            outline: none;
            border-color: var(--accent-cyan);
        }

        .reminder-input::placeholder {
            color: var(--text-muted);
        }

        @media (max-width: 576px) {
            .reminder-form {
                flex-direction: column;
            }
            .reminder-panel {
                padding: 28px 20px;
            }
        }

        /* ===== FAB ===== */
        .fab-neon {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8,9,15,0.75), rgba(8,9,15,0.75)), linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow-glow);
            transition: transform 0.25s ease, box-shadow 0.25s ease, color 0.25s ease;
            animation: fab-breathe 2.5s infinite;
        }

        .fab-neon:hover {
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
            color: var(--accent-gold);
        }

        .fab-neon:active {
            transform: scale(0.95);
        }

        .fab-neon .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            background: #ff3333;
            border-radius: 50%;
            animation: pulse-dot 1.5s infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.75; }
            50% { opacity: 1; }
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-soft);
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
        }

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .footer-brand .brand-icon {
            color: var(--accent-cyan);
            margin-right: 6px;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            max-width: 300px;
            line-height: 1.7;
        }

        .footer-heading {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }

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

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

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: color 0.2s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            margin-top: 32px;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Utility ===== */
        .text-accent-cyan {
            color: var(--accent-cyan) !important;
        }

        .text-accent-gold {
            color: var(--accent-gold) !important;
        }

        .text-muted-custom {
            color: var(--text-muted) !important;
        }

        .fw-800 {
            font-weight: 800 !important;
        }

        .fw-700 {
            font-weight: 700 !important;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.8px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-heading {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            text-align: left;
        }

        .section-description {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
            text-align: left;
        }

        .no-results {
            color: var(--text-muted);
            font-size: 0.95rem;
            padding: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            text-align: center;
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --bg-glass: rgba(13, 17, 30, 0.65);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #8B95A9;
            --border-color: rgba(0, 240, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.45);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2.5rem;
            --spacing-xl: 4rem;
            --spacing-xxl: 6rem;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-white);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        
        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        
        a:hover {
            color: var(--text-white);
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            outline: none;
        }
        
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        
        /* ========== NAVBAR ========== */
        .site-navbar {
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 0.75rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: background var(--transition-smooth);
        }
        
        .site-navbar.scrolled {
            background: rgba(8, 9, 15, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }
        
        .navbar-brand-custom {
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-white);
            letter-spacing: -0.01em;
            text-decoration: none;
        }
        
        .navbar-brand-custom .brand-icon {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            margin-right: 0.5rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
        }
        
        .navbar-brand-custom:hover {
            color: var(--text-white);
        }
        
        .nav-link-custom {
            color: var(--text-silver);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 1rem !important;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: relative;
        }
        
        .nav-link-custom:hover {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.08);
        }
        
        .nav-link-custom.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.1);
        }
        
        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-gradient);
            border-radius: 2px;
        }
        
        .navbar-toggler-custom {
            border: 1px solid var(--border-color);
            color: var(--text-white);
            background: rgba(13, 17, 30, 0.8);
            border-radius: var(--radius-sm);
            padding: 0.5rem 0.75rem;
            font-size: 1.1rem;
        }
        
        .navbar-toggler-custom:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
        }
        
        .nav-auth-group {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        
        .btn-login-text {
            background: none;
            color: var(--text-silver);
            font-weight: 500;
            font-size: 0.9rem;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        
        .btn-login-text:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.05);
        }
        
        .btn-signup-solid {
            background: var(--accent-gradient);
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.55rem 1.25rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
        }
        
        .btn-signup-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.4);
        }
        
        .btn-signup-solid:active {
            transform: translateY(0);
        }
        
        /* ========== ARTICLE BANNER ========== */
        .article-banner {
            position: relative;
            background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        
        .article-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        
        .article-banner-content {
            position: relative;
            z-index: 1;
            max-width: 820px;
            margin: 0 auto;
            text-align: center;
        }
        
        .article-badge-group {
            display: flex;
            gap: 0.75rem;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: var(--spacing-md);
        }
        
        .article-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-color);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 500;
            padding: 0.35rem 0.9rem;
            border-radius: 100px;
            letter-spacing: 0.02em;
        }
        
        .article-badge i {
            font-size: 0.75rem;
        }
        
        .article-h1 {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
            color: var(--text-white);
        }
        
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        
        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .article-meta-item i {
            color: var(--accent-cyan);
        }
        
        /* ========== ARTICLE CONTENT ========== */
        .article-content-wrapper {
            padding: var(--spacing-xl) 0;
            background: var(--bg-primary);
        }
        
        .article-content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-xl);
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        
        .article-main {
            max-width: 720px;
        }
        
        .article-body {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-silver);
        }
        
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-white);
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }
        
        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text-white);
            margin-top: var(--spacing-md);
            margin-bottom: var(--spacing-xs);
        }
        
        .article-body p {
            margin-bottom: var(--spacing-md);
        }
        
        .article-body ul,
        .article-body ol {
            margin-bottom: var(--spacing-md);
            padding-left: 1.5rem;
        }
        
        .article-body li {
            margin-bottom: 0.5rem;
        }
        
        .article-body img {
            border-radius: var(--radius-md);
            margin: var(--spacing-md) 0;
            box-shadow: var(--shadow-card);
        }
        
        .article-body blockquote {
            background: rgba(0, 82, 255, 0.08);
            border-left: 4px solid var(--accent-blue);
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin-bottom: var(--spacing-md);
            color: var(--text-white);
            font-style: italic;
        }
        
        .article-body a {
            border-bottom: 1px solid rgba(0, 240, 255, 0.4);
        }
        
        .article-not-found {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-xl);
            text-align: center;
        }
        
        .article-not-found-icon {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: var(--spacing-sm);
        }
        
        .article-not-found h2 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: var(--spacing-xs);
        }
        
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: var(--spacing-md);
        }
        
        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent-gradient);
            color: var(--text-white);
            font-weight: 600;
            padding: 0.7rem 1.5rem;
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
        }
        
        .btn-back-home:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 240, 255, 0.4);
            color: var(--text-white);
        }
        
        /* ========== SIDEBAR ========== */
        .article-sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        
        .sidebar-widget {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--spacing-md);
            margin-bottom: var(--spacing-md);
            backdrop-filter: blur(10px);
        }
        
        .sidebar-widget-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            padding-bottom: 0.75rem;
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .sidebar-widget-title i {
            color: var(--accent-cyan);
            font-size: 0.95rem;
        }
        
        .sidebar-download-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .sidebar-download-list li {
            margin-bottom: 0.6rem;
        }
        
        .sidebar-download-list li:last-child {
            margin-bottom: 0;
        }
        
        .sidebar-download-link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background: rgba(0, 240, 255, 0.06);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 0.7rem 0.9rem;
            color: var(--text-silver);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        
        .sidebar-download-link:hover {
            background: rgba(0, 240, 255, 0.12);
            border-color: var(--border-glow);
            color: var(--text-white);
            transform: translateX(4px);
        }
        
        .sidebar-download-link i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
            width: 20px;
            text-align: center;
        }
        
        .sidebar-tip-item {
            display: flex;
            gap: 0.75rem;
            padding: 0.6rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .sidebar-tip-item:last-child {
            border-bottom: none;
        }
        
        .sidebar-tip-icon {
            color: #FFD700;
            font-size: 0.9rem;
            margin-top: 0.2rem;
            flex-shrink: 0;
        }
        
        .sidebar-tip-text {
            color: var(--text-silver);
            font-size: 0.88rem;
            line-height: 1.5;
        }
        
        /* ========== FAB ========== */
        .fab-floating {
            position: fixed;
            left: 1.25rem;
            bottom: 6rem;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8, 9, 15, 0.85), rgba(8, 9, 15, 0.85)), var(--accent-gradient);
            background-origin: 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;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            transition: all var(--transition-smooth);
            animation: fabPulse 3s ease-in-out infinite;
            text-decoration: none;
        }
        
        .fab-floating:hover {
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
            color: var(--text-white);
        }
        
        .fab-floating:active {
            transform: scale(0.95);
        }
        
        @keyframes fabPulse {
            0%, 100% {
                box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
            }
            50% {
                box-shadow: 0 0 28px rgba(0, 240, 255, 0.5);
            }
        }
        
        .fab-floating .notification-dot {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: dotBlink 2s ease-in-out infinite;
        }
        
        @keyframes dotBlink {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.3);
            }
        }
        
        /* ========== CTA SECTION ========== */
        .article-cta-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            padding: var(--spacing-xl) 0;
            border-top: 1px solid var(--border-color);
        }
        
        .article-cta-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            text-align: center;
            box-shadow: var(--shadow-glow);
            backdrop-filter: blur(10px);
        }
        
        .article-cta-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            color: var(--text-white);
        }
        
        .article-cta-card p {
            color: var(--text-silver);
            font-size: 1.05rem;
            margin-bottom: var(--spacing-md);
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .article-cta-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent-gradient);
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 0.8rem 1.75rem;
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 20px rgba(0, 240, 255, 0.3);
        }
        
        .btn-cta-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.45);
            color: var(--text-white);
        }
        
        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid var(--border-color);
            color: var(--accent-cyan);
            font-weight: 500;
            font-size: 1rem;
            padding: 0.8rem 1.75rem;
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-fast);
        }
        
        .btn-cta-secondary:hover {
            background: rgba(0, 240, 255, 0.15);
            border-color: var(--border-glow);
            color: var(--text-white);
        }
        
        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-xl);
        }
        
        .footer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .footer-brand .brand-icon {
            color: var(--accent-cyan);
            font-size: 1.3rem;
            filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.5));
        }
        
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 0;
        }
        
        .footer-heading {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.02em;
        }
        
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .footer-links li {
            margin-bottom: 0.6rem;
        }
        
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: var(--spacing-md);
            color: var(--text-muted);
            font-size: 0.82rem;
            text-align: center;
        }
        
        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-h1 {
                font-size: 2rem;
            }
            
            .article-content-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            
            .article-sidebar {
                position: static;
            }
            
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
        }
        
        @media (max-width: 768px) {
            .article-h1 {
                font-size: 1.6rem;
            }
            
            .article-banner {
                padding: var(--spacing-lg) 0;
            }
            
            .article-content-wrapper {
                padding: var(--spacing-lg) 0;
            }
            
            .article-body {
                font-size: 0.98rem;
            }
            
            .article-cta-card {
                padding: var(--spacing-md);
            }
            
            .article-cta-card h2 {
                font-size: 1.4rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-sm);
            }
            
            .nav-auth-group {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
                padding-top: 0.75rem;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 0.75rem;
            }
            
            .btn-login-text,
            .btn-signup-solid {
                width: 100%;
                text-align: center;
            }
        }
        
        @media (max-width: 520px) {
            .article-h1 {
                font-size: 1.35rem;
            }
            
            .article-meta {
                gap: 0.75rem;
                font-size: 0.8rem;
            }
            
            .article-badge-group {
                gap: 0.5rem;
            }
            
            .article-badge {
                font-size: 0.72rem;
                padding: 0.3rem 0.7rem;
            }
            
            .article-content-grid {
                padding: 0 var(--spacing-sm);
            }
            
            .article-cta-buttons {
                flex-direction: column;
            }
            
            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                justify-content: center;
            }
            
            .fab-floating {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                left: 0.75rem;
                bottom: 5rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090f;
            --bg-secondary: #0d111e;
            --bg-card: rgba(18, 24, 40, 0.85);
            --bg-glass: rgba(13, 17, 30, 0.75);
            --accent-blue: #0052ff;
            --accent-cyan: #00f0ff;
            --accent-neon: #00f0ff;
            --text-white: #ffffff;
            --text-silver: #cbd5e1;
            --text-muted: #8b9bb4;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.5);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-sans: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-white);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(circle at 10% 20%, rgba(0, 82, 255, 0.08) 0%, transparent 40%),
                              radial-gradient(circle at 90% 80%, rgba(0, 240, 255, 0.06) 0%, transparent 40%),
                              linear-gradient(180deg, #08090f 0%, #0d111e 100%);
        }

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

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

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

        button, .btn {
            font-family: var(--font-sans);
            transition: all var(--transition);
            outline: none;
        }

        button:focus-visible, a:focus-visible, .btn:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
        }

        /* Header/Navbar */
        .site-navbar {
            background-color: rgba(8, 9, 15, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 14px 0;
            transition: all var(--transition);
            position: relative;
            z-index: 1030;
        }

        .navbar-brand-custom {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-icon {
            color: var(--accent-cyan);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.5));
        }

        .navbar-toggler-custom {
            border: 1px solid rgba(0, 240, 255, 0.3);
            background: rgba(0, 240, 255, 0.05);
            color: var(--accent-cyan);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 1.2rem;
        }

        .nav-link-custom {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-silver);
            padding: 8px 16px !important;
            border-radius: 20px;
            transition: all var(--transition);
            position: relative;
        }

        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--text-white);
            background: rgba(0, 240, 255, 0.1);
        }

        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--accent-cyan);
        }

        .nav-auth-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login-text {
            background: transparent;
            border: none;
            color: var(--text-silver);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 16px;
            cursor: pointer;
            transition: color var(--transition);
        }

        .btn-login-text:hover {
            color: var(--accent-cyan);
        }

        .btn-signup-solid {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 10px 22px;
            border-radius: 30px;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.4);
            transition: all var(--transition);
        }

        .btn-signup-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 240, 255, 0.5);
            background: linear-gradient(135deg, #1a6bff, #33f5ff);
        }

        /* Hero (Category-specific, video-style) */
        .hero-category {
            position: relative;
            padding: 80px 0 70px;
            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;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.7) 0%, rgba(8,9,15,0.85) 50%, rgba(8,9,15,0.95) 100%);
            z-index: 1;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 40%, rgba(0,240,255,0.15) 0%, transparent 60%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: left;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--border-strong);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 8px 18px;
            border-radius: 30px;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
            backdrop-filter: blur(10px);
        }

        .hero-category h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 20px;
            max-width: 700px;
        }

        .hero-category .hero-sub {
            font-size: 1.15rem;
            color: var(--text-silver);
            max-width: 600px;
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .btn-hero-primary {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 34px;
            border-radius: 40px;
            box-shadow: 0 4px 24px rgba(0, 240, 255, 0.5);
            transition: all var(--transition);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-hero-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.7);
        }

        .btn-hero-secondary {
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 40px;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition);
            margin-left: 12px;
        }

        .btn-hero-secondary:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0,240,255,0.3);
        }

        /* Feature Highlight Section */
        .section-feature {
            padding: 70px 0;
            background: transparent;
        }

        .section-label {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--accent-cyan);
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 15px;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-silver);
            max-width: 700px;
            line-height: 1.7;
            margin-bottom: 35px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 10px;
        }

        .feature-item {
            background: var(--bg-glass);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .feature-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .feature-item:hover::before {
            opacity: 1;
        }

        .feature-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            filter: drop-shadow(0 0 10px rgba(0,240,255,0.4));
        }

        .feature-item h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

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

        /* Steps Section */
        .section-steps {
            padding: 70px 0;
            background: rgba(13, 17, 30, 0.5);
            border-top: 1px solid rgba(0,240,255,0.1);
            border-bottom: 1px solid rgba(0,240,255,0.1);
        }

        .steps-list {
            list-style: none;
            counter-reset: step-counter;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .steps-list li {
            counter-increment: step-counter;
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: rgba(18, 24, 40, 0.6);
            border: 1px solid rgba(0,240,255,0.1);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            transition: all var(--transition);
        }

        .steps-list li:hover {
            border-color: var(--border-strong);
            box-shadow: 0 0 20px rgba(0,240,255,0.15);
        }

        .steps-list li::before {
            content: counter(step-counter);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 0 16px rgba(0,240,255,0.4);
        }

        .steps-list li strong {
            display: block;
            font-size: 1.05rem;
            color: #fff;
            margin-bottom: 4px;
        }

        .steps-list li span {
            color: var(--text-silver);
            font-size: 0.9rem;
        }

        /* Showcase / Image section */
        .section-showcase {
            padding: 70px 0;
        }

        .showcase-card {
            background: var(--bg-glass);
            backdrop-filter: blur(15px);
            border: 1px solid rgba(0,240,255,0.15);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .showcase-card img {
            width: 100%;
            height: 240px;
            object-fit: cover;
            border-bottom: 1px solid rgba(0,240,255,0.1);
        }

        .showcase-body {
            padding: 24px;
        }

        .showcase-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .showcase-body p {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* FAQ Section */
        .section-faq {
            padding: 70px 0;
            background: rgba(13, 17, 30, 0.4);
        }

        .accordion-custom .accordion-item {
            background: rgba(18, 24, 40, 0.7);
            border: 1px solid rgba(0,240,255,0.15);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .accordion-custom .accordion-button {
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: all var(--transition);
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.05);
            color: var(--accent-cyan);
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            filter: invert(1);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border-strong);
        }

        .accordion-custom .accordion-body {
            color: var(--text-silver);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 18px 22px;
            border-top: 1px solid rgba(0,240,255,0.1);
        }

        /* CTA Section */
        .section-cta {
            padding: 70px 0;
        }

        .cta-panel {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.1));
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            backdrop-filter: blur(15px);
        }

        .cta-panel h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 15px;
        }

        .cta-panel p {
            color: var(--text-silver);
            max-width: 600px;
            margin: 0 auto 25px;
            line-height: 1.7;
        }

        /* Footer */
        .site-footer {
            background: #06080f;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 50px 0 20px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 15px;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 300px;
        }

        .footer-heading {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 15px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

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

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

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

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

        .footer-bottom {
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(12px);
            border: 2px solid var(--border-strong);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
            cursor: pointer;
            transition: all var(--transition);
            animation: fab-breathing 3s ease-in-out infinite;
        }

        .fab-support:hover {
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.8);
            animation: none;
        }

        @keyframes fab-breathing {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 1; }
        }

        /* Responsive */
        @media (max-width: 991px) {
            .hero-category h1 {
                font-size: 2.4rem;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .nav-auth-group {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                margin-top: 10px;
            }
        }

        @media (max-width: 768px) {
            .hero-category {
                padding: 50px 0 40px;
                min-height: 420px;
            }
            .hero-category h1 {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .btn-hero-primary, .btn-hero-secondary {
                font-size: 0.9rem;
                padding: 12px 20px;
                display: flex;
                width: 100%;
                justify-content: center;
                margin-bottom: 10px;
                margin-left: 0;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .navbar-brand-custom span {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .hero-category h1 {
                font-size: 1.7rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 6px 14px;
            }
            .cta-panel {
                padding: 30px 20px;
            }
            .fab-support {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: rgba(255, 255, 255, 0.05);
            --bg-card-hover: rgba(255, 255, 255, 0.09);
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-glass: rgba(255, 255, 255, 0.12);
            --border-neon: rgba(0, 240, 255, 0.35);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.35);
            --shadow-lime: 0 0 12px rgba(204, 255, 0, 0.45);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.5s ease;
            --font-family: 'Be Vietnam Pro', sans-serif;
            --section-gap: 80px;
            --nav-height: 76px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 40%, #0F0C20 100%);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        ::selection {
            background: var(--accent-cyan);
            color: var(--bg-primary);
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--section-gap) 0;
            position: relative;
        }

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

        .section-header {
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--accent-lime);
            background: rgba(204, 255, 0, 0.08);
            padding: 6px 16px;
            border-radius: 100px;
            border: 1px solid rgba(204, 255, 0, 0.2);
            margin-bottom: 16px;
        }

        .section-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.7;
        }

        /* ============ NAVBAR ============ */
        .site-navbar {
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 0;
            min-height: var(--nav-height);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: all var(--transition-base);
        }

        .navbar-brand-custom {
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
        }

        .navbar-brand-custom:hover {
            color: var(--text-primary);
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 12px;
            font-size: 1.2rem;
            color: var(--bg-primary);
            flex-shrink: 0;
        }

        .nav-link-custom {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--text-primary) !important;
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link-custom.active {
            color: var(--accent-lime) !important;
        }

        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-lime);
            border-radius: 2px;
            box-shadow: var(--shadow-lime);
        }

        .navbar-toggler-custom {
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-size: 1.1rem;
        }

        .navbar-toggler-custom:focus {
            box-shadow: none;
            border-color: var(--accent-cyan);
        }

        .nav-auth-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login-text {
            background: none;
            border: none;
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 16px;
            transition: color var(--transition-fast);
        }

        .btn-login-text:hover {
            color: var(--text-primary);
        }

        .btn-signup-solid {
            background: linear-gradient(135deg, var(--accent-lime), #A8E600);
            color: var(--bg-primary);
            border: none;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 10px 24px;
            border-radius: 10px;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(204, 255, 0, 0.3);
        }

        .btn-signup-solid:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(204, 255, 0, 0.45);
            background: linear-gradient(135deg, #D9FF33, #B8F000);
        }

        /* ============ HERO ============ */
        .hero-inner {
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .hero-inner::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.12), transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner::after {
            content: '';
            position: absolute;
            bottom: -300px;
            left: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(204, 255, 0, 0.08), transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--accent-cyan);
            padding: 8px 20px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 24px;
            color: var(--text-primary);
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 36px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .btn-primary-neon {
            background: linear-gradient(135deg, var(--accent-lime), #A8E600);
            color: var(--bg-primary);
            border: none;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 14px 32px;
            border-radius: 12px;
            transition: all var(--transition-base);
            box-shadow: 0 6px 24px rgba(204, 255, 0, 0.35);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary-neon:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(204, 255, 0, 0.5);
            background: linear-gradient(135deg, #D9FF33, #B8F000);
            color: var(--bg-primary);
        }

        .btn-secondary-glass {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 14px 28px;
            border-radius: 12px;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(10px);
        }

        .btn-secondary-glass:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(0, 240, 255, 0.4);
            color: var(--accent-cyan);
            transform: translateY(-3px);
        }

        .hero-visual {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), var(--shadow-neon);
            max-height: 420px;
            object-fit: cover;
            width: 100%;
        }

        .hero-stats-row {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-lime);
            letter-spacing: -0.5px;
        }

        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* ============ COUPON WALL ============ */
        .coupon-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .coupon-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(10px);
            cursor: pointer;
        }

        .coupon-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            transform: translateY(-4px);
            box-shadow: var(--shadow-neon);
        }

        .coupon-card.featured {
            grid-column: 1 / -1;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(204, 255, 0, 0.06));
            border-color: rgba(0, 240, 255, 0.4);
        }

        .coupon-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-lime);
            color: var(--bg-primary);
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 100px;
            letter-spacing: 0.5px;
        }

        .coupon-tag.hot {
            background: #FF4757;
            color: #fff;
            animation: pulse-tag 1.5s ease-in-out infinite;
        }

        @keyframes pulse-tag {
            0%, 100% { box-shadow: 0 0 0 0 rgba(255, 71, 87, 0.5); }
            50% { box-shadow: 0 0 0 8px rgba(255, 71, 87, 0); }
        }

        .coupon-value {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent-cyan);
            letter-spacing: -1px;
            margin-bottom: 8px;
            line-height: 1.1;
        }

        .coupon-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .coupon-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.6;
        }

        .coupon-btn {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 10px 20px;
            border-radius: 8px;
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .coupon-card:hover .coupon-btn {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            border-color: var(--accent-cyan);
        }

        /* ============ FEATURE LIST ============ */
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glass);
            transition: all var(--transition-base);
        }

        .feature-item:hover {
            background: var(--bg-card-hover);
            border-color: rgba(204, 255, 0, 0.3);
            transform: translateX(4px);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            min-width: 48px;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(0, 82, 255, 0.15));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
        }

        .feature-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .feature-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ============ SCENARIO CARDS ============ */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            transition: all var(--transition-base);
            position: relative;
        }

        .scenario-card:hover {
            border-color: rgba(0, 240, 255, 0.35);
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
        }

        .scenario-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .scenario-body {
            padding: 24px;
        }

        .scenario-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

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

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

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

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.06);
            color: var(--accent-cyan);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(0, 240, 255, 0.3);
        }

        .faq-accordion .accordion-button::after {
            filter: invert(1) brightness(1.5);
        }

        .faq-accordion .accordion-body {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            padding: 0 24px 20px;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(204, 255, 0, 0.08));
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(0, 240, 255, 0.25);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.2), transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 550px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            position: relative;
            z-index: 1;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(10, 8, 20, 0.9);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 56px 0 24px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 380px;
        }

        .footer-heading {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

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

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ============ FAB ============ */
        .fab-custom {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 999;
            width: 56px;
            height: 56px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 2px solid transparent;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            cursor: pointer;
            transition: all var(--transition-base);
            opacity: 0.6;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            background-clip: padding-box;
        }

        .fab-custom::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-lime), var(--accent-cyan));
            z-index: -1;
            opacity: 0.6;
            transition: opacity var(--transition-base);
        }

        .fab-custom:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
        }

        .fab-custom:hover::before {
            opacity: 1;
        }

        .fab-custom:active {
            transform: scale(0.95);
        }

        .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 14px;
            height: 14px;
            background: #FF4757;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: blink-notification 1.2s ease-in-out infinite;
        }

        @keyframes blink-notification {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 60px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero-inner {
                padding: 60px 0 40px;
            }
            .hero-visual img {
                max-height: 320px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --nav-height: 64px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .navbar-brand-custom {
                font-size: 1.05rem;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
                border-radius: 10px;
            }
            .nav-auth-group {
                margin-top: 12px;
                width: 100%;
                justify-content: center;
            }
            .btn-signup-solid,
            .btn-login-text {
                flex: 1;
                text-align: center;
            }
            .hero-inner {
                padding: 40px 0 32px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats-row {
                gap: 24px;
                margin-top: 32px;
                padding-top: 24px;
            }
            .hero-stat-number {
                font-size: 1.4rem;
            }
            .coupon-grid {
                grid-template-columns: 1fr;
            }
            .coupon-card.featured {
                grid-column: auto;
            }
            .coupon-value {
                font-size: 1.8rem;
            }
            .feature-item {
                padding: 18px;
                gap: 14px;
            }
            .feature-icon {
                width: 40px;
                height: 40px;
                min-width: 40px;
                font-size: 1.1rem;
            }
            .scenario-img {
                height: 150px;
            }
            .cta-section {
                padding: 40px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .fab-custom {
                left: 16px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .btn-primary-neon,
            .btn-secondary-glass {
                width: 100%;
                justify-content: center;
            }
            .hero-stats-row {
                flex-direction: column;
                gap: 16px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .coupon-card {
                padding: 20px;
            }
            .coupon-value {
                font-size: 1.6rem;
            }
            .feature-item {
                flex-direction: column;
                gap: 12px;
            }
            .scenario-body {
                padding: 16px;
            }
            .fab-custom {
                bottom: 72px;
            }
        }