/* roulang page: index */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #0E3823;
            --tertiary-bg: #123E25;
            --accent-gold: #FFD700;
            --accent-gold-hover: #E6C200;
            --accent-soft: #FFF3C4;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #A8CBC0;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-soft: rgba(255, 255, 255, 0.1);
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-bg-hover: rgba(255, 255, 255, 0.08);
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-xxl: 80px;
            --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-fast: 0.18s ease;
        }

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

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

        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-white);
            background: var(--primary-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-soft);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(10, 46, 28, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: -0.01em;
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-gold) 0%, #B8860B 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #0A2E1C;
            flex-shrink: 0;
        }

        .nav-logo span {
            color: var(--accent-gold);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            flex: 1;
            justify-content: center;
        }

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
        }

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

        .nav-links a.active {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-login {
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }

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

        .nav-signup {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 0.92rem;
            padding: 10px 22px;
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-signup:hover {
            background: var(--accent-gold-hover);
            color: #0A2E1C;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 215, 0, 0.3);
        }

        .nav-toggle {
            display: none;
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-size: 1.4rem;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        @media (max-width: 992px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(10, 46, 28, 0.98);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-soft);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
            }

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

            .nav-links a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: 10px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-login {
                padding: 8px 10px;
                font-size: 0.85rem;
            }

            .nav-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .nav-wrapper {
                height: 64px;
            }

            .nav-logo {
                font-size: 0.95rem;
            }

            .nav-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }

            .nav-login {
                display: block;
            }

            .nav-signup {
                display: block;
                padding: 8px 14px;
            }
        }

        /* ===== Hero Section ===== */
        .hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 46, 28, 0.88) 0%, rgba(10, 46, 28, 0.7) 50%, rgba(10, 46, 28, 0.85) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 40%, rgba(255, 215, 0, 0.08) 0%, transparent 60%);
            z-index: 1;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent-gold);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            border: 1px solid var(--border-gold);
            margin-bottom: 20px;
        }

        .hero-badge i {
            font-size: 0.75rem;
        }

        .hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            color: var(--text-white);
        }

        .hero h1 .highlight {
            color: var(--accent-gold);
            position: relative;
        }

        .hero-description {
            font-size: 1.08rem;
            line-height: 1.65;
            color: var(--text-pale);
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-cta-row {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .btn-gold {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 12px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
        }

        .btn-gold:hover {
            background: var(--accent-gold-hover);
            color: #0A2E1C;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(255, 215, 0, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 12px;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
        }

        .btn-outline:hover {
            border-color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.08);
            color: var(--accent-gold);
            transform: translateY(-2px);
        }

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

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

        .hero-stat-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-gold);
            letter-spacing: -0.02em;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        /* Hero Right Panel - Session Selection */
        .hero-panel {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-soft);
            max-width: 460px;
            margin-left: auto;
        }

        .hero-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }

        .hero-panel-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
        }

        .hero-panel-badge {
            font-size: 0.75rem;
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.1);
            padding: 4px 12px;
            border-radius: 50px;
            border: 1px solid var(--border-gold);
            font-weight: 600;
        }

        .session-options {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 20px;
        }

        .session-option {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 12px;
            border: 1px solid transparent;
            transition: border-color var(--transition-fast), background var(--transition-fast);
            cursor: pointer;
        }

        .session-option:hover {
            border-color: var(--border-gold);
            background: rgba(255, 215, 0, 0.06);
        }

        .session-option-icon {
            width: 40px;
            height: 40px;
            background: rgba(255, 215, 0, 0.12);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--accent-gold);
            flex-shrink: 0;
        }

        .session-option-info {
            flex: 1;
        }

        .session-option-name {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-white);
        }

        .session-option-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .session-option-arrow {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .session-option:hover .session-option-arrow {
            color: var(--accent-gold);
        }

        .hero-panel-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border-soft);
        }

        .hero-panel-note {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-panel-note i {
            color: var(--accent-gold);
        }

        @media (max-width: 992px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .hero {
                padding-top: 110px;
                min-height: auto;
                padding-bottom: 60px;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .hero-panel {
                max-width: 100%;
                margin-left: 0;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }

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

            .hero-cta-row {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-gold,
            .btn-outline {
                justify-content: center;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-panel {
                padding: 18px;
            }
        }

        /* ===== Section Base ===== */
        .section {
            padding: 64px 0;
        }

        .section-header {
            margin-bottom: 36px;
            max-width: 720px;
        }

        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-gold);
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }

        .section-label i {
            font-size: 0.75rem;
        }

        .section-title {
            font-size: 1.9rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--text-white);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 1rem;
            line-height: 1.65;
            color: var(--text-pale);
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 1.5rem;
            }
        }

        /* ===== Highlights Wall ===== */
        .highlights-section {
            background: var(--secondary-bg);
            position: relative;
        }

        .highlights-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-gold), transparent);
        }

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

        .highlight-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            cursor: pointer;
        }

        .highlight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-soft);
            border-color: var(--border-gold);
        }

        .highlight-card-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

        .highlight-card:hover .highlight-card-image img {
            transform: scale(1.06);
        }

        .highlight-card-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, transparent 40%, rgba(10, 46, 28, 0.75) 100%);
        }

        .highlight-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent-gold);
            color: #0A2E1C;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 50px;
            z-index: 2;
            letter-spacing: 0.03em;
        }

        .highlight-card-body {
            padding: 18px 20px 20px;
        }

        .highlight-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .highlight-card-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 14px;
        }

        .highlight-card-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-gold);
            transition: gap var(--transition-fast);
        }

        .highlight-card-btn:hover {
            gap: 10px;
        }

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

        @media (max-width: 600px) {
            .highlights-grid {
                grid-template-columns: 1fr;
            }

            .highlight-card-image {
                height: 170px;
            }
        }

        /* ===== Benefits (Trial Benefits) ===== */
        .benefits-section {
            background: var(--primary-bg);
        }

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

        .benefit-item {
            padding: 24px 18px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
            text-align: left;
        }

        .benefit-item:hover {
            border-color: var(--border-gold);
            background: var(--card-bg-hover);
            transform: translateY(-2px);
        }

        .benefit-icon {
            width: 48px;
            height: 48px;
            background: rgba(255, 215, 0, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-gold);
            margin-bottom: 14px;
        }

        .benefit-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .benefit-desc {
            font-size: 0.86rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

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

        @media (max-width: 520px) {
            .benefits-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ===== Difficulty Levels ===== */
        .levels-section {
            background: var(--secondary-bg);
            position: relative;
        }

        .levels-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-gold), transparent);
        }

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

        .level-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
            padding: 26px 22px;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
            position: relative;
            overflow: hidden;
        }

        .level-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-gold), transparent);
            opacity: 0.6;
        }

        .level-card:hover {
            border-color: var(--border-gold);
            transform: translateY(-4px);
            box-shadow: var(--shadow-soft);
        }

        .level-card.easy::before {
            background: linear-gradient(90deg, #32CD32, transparent);
        }

        .level-card.medium::before {
            background: linear-gradient(90deg, #FFA500, transparent);
        }

        .level-card.hard::before {
            background: linear-gradient(90deg, #FF4500, transparent);
        }

        .level-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .level-card-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .level-card.easy .level-card-icon {
            background: rgba(50, 205, 50, 0.15);
            color: #32CD32;
        }

        .level-card.medium .level-card-icon {
            background: rgba(255, 165, 0, 0.15);
            color: #FFA500;
        }

        .level-card.hard .level-card-icon {
            background: rgba(255, 69, 0, 0.15);
            color: #FF4500;
        }

        .level-card-name {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.3;
        }

        .level-card-suites {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

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

        .level-card-stats {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .level-stat {
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .level-stat i {
            color: var(--accent-gold);
            font-size: 0.75rem;
        }

        @media (max-width: 992px) {
            .levels-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Devices Section ===== */
        .devices-section {
            background: var(--primary-bg);
        }

        .devices-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-top: 28px;
        }

        .device-image-wrapper {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-soft);
        }

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

        .device-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .device-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .device-item-icon {
            width: 44px;
            height: 44px;
            background: rgba(255, 215, 0, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-gold);
            flex-shrink: 0;
        }

        .device-item-text h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 4px;
        }

        .device-item-text p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        @media (max-width: 768px) {
            .devices-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .device-image-wrapper img {
                height: 220px;
            }
        }

        /* ===== Guarantee Bar ===== */
        .guarantee-section {
            background: var(--secondary-bg);
            padding: 36px 0;
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 18px;
            text-align: center;
        }

        .guarantee-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            padding: 18px 10px;
        }

        .guarantee-icon {
            width: 52px;
            height: 52px;
            background: rgba(255, 215, 0, 0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-gold);
            border: 1px solid var(--border-gold);
        }

        .guarantee-text {
            font-size: 0.85rem;
            color: var(--text-pale);
            font-weight: 600;
            line-height: 1.4;
        }

        .guarantee-sub {
            font-size: 0.75rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        @media (max-width: 992px) {
            .guarantee-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }
        }

        @media (max-width: 520px) {
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ===== News / CMS Section ===== */
        .news-section {
            background: var(--primary-bg);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
            margin-top: 28px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .news-link {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 18px;
            background: var(--card-bg);
            border-radius: 12px;
            border: 1px solid var(--border-soft);
            transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            color: inherit;
        }

        .news-link:hover {
            border-color: var(--border-gold);
            background: var(--card-bg-hover);
            transform: translateX(4px);
        }

        .news-link-icon {
            width: 36px;
            height: 36px;
            background: rgba(255, 215, 0, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: var(--accent-gold);
            flex-shrink: 0;
        }

        .news-link-content {
            flex: 1;
            min-width: 0;
        }

        .news-link-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            line-height: 1.4;
            margin-bottom: 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .news-link-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .news-link-arrow {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .news-link:hover .news-link-arrow {
            color: var(--accent-gold);
        }

        .news-sidebar {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
            padding: 24px;
            height: fit-content;
        }

        .news-sidebar-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .news-sidebar-title i {
            color: var(--accent-gold);
            font-size: 1rem;
        }

        .news-sidebar-text {
            font-size: 0.88rem;
            color: var(--text-pale);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .news-sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .news-tag {
            font-size: 0.78rem;
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.08);
            padding: 6px 14px;
            border-radius: 50px;
            border: 1px solid var(--border-gold);
            font-weight: 600;
            transition: background var(--transition-fast);
        }

        .news-tag:hover {
            background: rgba(255, 215, 0, 0.16);
        }

        .empty-note {
            font-size: 0.95rem;
            color: var(--text-muted);
            padding: 24px;
            text-align: center;
            background: var(--card-bg);
            border-radius: 12px;
            border: 1px solid var(--border-soft);
        }

        @media (max-width: 768px) {
            .news-layout {
                grid-template-columns: 1fr;
            }

            .news-link-title {
                white-space: normal;
            }
        }

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

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 28px;
            max-width: 820px;
        }

        .faq-item {
            background: var(--card-bg);
            border-radius: 12px;
            border: 1px solid var(--border-soft);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            text-align: left;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            background: none;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: var(--card-bg-hover);
        }

        .faq-question .faq-icon {
            font-size: 0.85rem;
            color: var(--accent-gold);
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 20px;
        }

        .faq-answer-inner {
            font-size: 0.9rem;
            color: var(--text-pale);
            line-height: 1.65;
            padding-top: 14px;
            border-top: 1px solid var(--border-soft);
        }

        /* ===== Form / CTA Section ===== */
        .form-section {
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 72px 0;
        }

        .form-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 46, 28, 0.88);
            z-index: 1;
        }

        .form-section .container {
            position: relative;
            z-index: 2;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .form-info h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .form-info p {
            font-size: 0.98rem;
            color: var(--text-pale);
            line-height: 1.65;
            margin-bottom: 24px;
        }

        .form-info-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .form-info-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-pale);
        }

        .form-info-list li i {
            color: var(--accent-gold);
            font-size: 0.85rem;
        }

        .register-form {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
            padding: 28px;
            box-shadow: var(--shadow-soft);
        }

        .register-form h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-pale);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--border-soft);
            border-radius: 10px;
            color: var(--text-white);
            font-size: 0.95rem;
            transition: border-color var(--transition-fast), background var(--transition-fast);
            appearance: none;
        }

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

        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent-gold);
            background: rgba(255, 255, 255, 0.1);
        }

        .form-group select option {
            background: #0A2E1C;
            color: var(--text-white);
        }

        .form-submit {
            width: 100%;
            padding: 14px;
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 12px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 8px;
        }

        .form-submit:hover {
            background: var(--accent-gold-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.3);
        }

        .form-message {
            display: none;
            margin-top: 14px;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 0.85rem;
            font-weight: 600;
            text-align: center;
        }

        .form-message.success {
            display: block;
            background: rgba(50, 205, 50, 0.15);
            color: #32CD32;
            border: 1px solid rgba(50, 205, 50, 0.4);
        }

        @media (max-width: 768px) {
            .form-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .form-info h2 {
                font-size: 1.4rem;
            }

            .register-form {
                padding: 20px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #071E12;
            border-top: 1px solid var(--border-soft);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
            max-width: 320px;
        }

        .footer-brand .nav-logo {
            margin-bottom: 14px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-pale);
            transition: background var(--transition-fast), color var(--transition-fast);
            font-size: 0.9rem;
            text-decoration: none;
        }

        .footer-social a:hover {
            background: var(--accent-gold);
            color: #0A2E1C;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            text-decoration: none;
        }

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

        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--border-soft);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-copyright {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===== FAB ===== */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(145deg, #1A1A1A, #0A0A0A);
            border: 2px solid var(--accent-gold);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-gold);
            cursor: pointer;
            opacity: 0.7;
            transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
            animation: fab-breathe 3s ease-in-out infinite;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 30px rgba(255, 215, 0, 0.45);
        }

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

        .fab-notification {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            background: #FF0040;
            border-radius: 50%;
            border: 2px solid #0A0A0A;
            animation: fab-dot-blink 1.5s ease-in-out infinite;
        }

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

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

        /* ===== Mobile FAB adjustment ===== */
        @media (max-width: 520px) {
            .fab {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #0E3823;
            --tertiary-bg: #123E25;
            --accent-gold: #FFD700;
            --accent-gold-hover: #E6C200;
            --accent-soft: #FFF3C4;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #A8CBC0;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-soft: rgba(255, 255, 255, 0.1);
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-bg-hover: rgba(255, 255, 255, 0.08);
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-xxl: 80px;
            --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-fast: 0.18s ease;
        }

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

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

        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-white);
            background: var(--primary-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-soft);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(10, 46, 28, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: -0.01em;
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-gold) 0%, #B8860B 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #0A2E1C;
            flex-shrink: 0;
        }

        .nav-logo span {
            color: var(--accent-gold);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            flex: 1;
            justify-content: center;
        }

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
        }

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

        .nav-links a.active {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-login {
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }

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

        .nav-signup {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 0.92rem;
            padding: 10px 22px;
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-signup:hover {
            background: var(--accent-gold-hover);
            color: #0A2E1C;
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 8px;
        }

        @media (max-width: 992px) {
            .nav-links {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(10, 46, 28, 0.98);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 8px;
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                border-bottom: 1px solid var(--border-soft);
            }

            .nav-links.nav-open {
                transform: translateY(0);
            }

            .nav-toggle {
                display: block;
            }

            .nav-actions {
                gap: 6px;
            }

            .nav-login {
                padding: 8px 10px;
            }

            .nav-signup {
                padding: 8px 14px;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 1rem;
            transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
            border: 1px solid transparent;
        }

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

        .btn-primary {
            background: var(--accent-gold);
            color: #0A2E1C;
        }

        .btn-primary:hover {
            background: var(--accent-gold-hover);
            color: #0A2E1C;
            transform: translateY(-2px);
            box-shadow: var(--shadow-gold);
        }

        .btn-outline {
            background: transparent;
            border-color: var(--border-gold);
            color: var(--accent-gold);
        }

        .btn-outline:hover {
            background: rgba(255, 215, 0, 0.08);
            transform: translateY(-2px);
        }

        /* ===== Hero ===== */
        .hero {
            padding: 120px 0 70px;
            background: radial-gradient(circle at 20% 30%, rgba(255, 215, 0, 0.08), transparent 45%),
                        radial-gradient(circle at 80% 70%, rgba(18, 62, 37, 0.9), transparent 60%),
                        var(--primary-bg);
            position: relative;
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.5rem);
            line-height: 1.15;
            font-weight: 800;
            font-family: var(--font-heading);
            letter-spacing: -0.02em;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-pale);
            margin-top: 20px;
            max-width: 600px;
            line-height: 1.6;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
        }

        .hero-visual {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
        }

        .countdown-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 28px;
            text-align: center;
            width: 100%;
            max-width: 360px;
            box-shadow: var(--shadow-soft);
        }

        .countdown-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .countdown-ring {
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: conic-gradient(var(--accent-gold) calc(var(--progress, 100) * 1%), rgba(255, 255, 255, 0.08) 0);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            position: relative;
        }

        .countdown-ring::before {
            content: '';
            position: absolute;
            inset: 10px;
            background: var(--secondary-bg);
            border-radius: 50%;
        }

        .countdown-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent-gold);
            position: relative;
            z-index: 2;
        }

        .countdown-ring span {
            font-size: 0.85rem;
            color: var(--text-muted);
            position: relative;
            z-index: 2;
        }

        .countdown-meta {
            display: flex;
            justify-content: center;
            gap: 6px;
            font-size: 0.9rem;
            color: var(--text-pale);
            font-weight: 600;
            letter-spacing: 1px;
        }

        .carousel-dots {
            display: flex;
            gap: 8px;
        }

        .dot {
            width: 10px;
            height: 10px;
            border-radius: 5px;
            background: var(--border-soft);
            transition: background var(--transition-fast), width var(--transition-fast);
        }

        .dot.active {
            background: var(--accent-gold);
            width: 28px;
        }

        /* ===== Sections ===== */
        .section {
            padding: 70px 0;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-title {
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            font-weight: 700;
            font-family: var(--font-heading);
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .section-lead {
            color: var(--text-muted);
            max-width: 720px;
            font-size: 1.05rem;
        }

        .section-alt {
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }

        /* ===== Value Section ===== */
        .value-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .value-media img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-soft);
            width: 100%;
            height: auto;
        }

        .value-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .value-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-pale);
            font-size: 1rem;
        }

        .value-list li i {
            color: var(--accent-gold);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== Steps Section ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 32px;
        }

        .step-item {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
            overflow: hidden;
            transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
        }

        .step-item:hover {
            background: var(--card-bg-hover);
            transform: translateY(-4px);
            border-color: var(--border-gold);
        }

        .step-number {
            font-size: 3rem;
            font-weight: 800;
            color: rgba(255, 215, 0, 0.2);
            position: absolute;
            top: 12px;
            right: 16px;
            line-height: 1;
            user-select: none;
        }

        .step-icon {
            width: 48px;
            height: 48px;
            background: rgba(255, 215, 0, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            color: var(--accent-gold);
            font-size: 1.4rem;
            margin-bottom: 16px;
        }

        .step-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* ===== Usage Section ===== */
        .usage-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .usage-checklist {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .usage-checklist li {
            color: var(--text-pale);
            font-size: 1rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .usage-checklist li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--accent-gold);
            flex-shrink: 0;
            margin-top: 2px;
        }

        .usage-media img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-soft);
            width: 100%;
            height: auto;
        }

        /* ===== Testimonial / Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .stat-item {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-gold);
            line-height: 1.2;
        }

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

        .testimonial-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .testimonial-card {
            background: var(--card-bg);
            border-left: 4px solid var(--accent-gold);
            border-radius: var(--radius-sm);
            padding: 24px;
        }

        .testimonial-text {
            color: var(--text-pale);
            font-style: italic;
            margin-bottom: 16px;
        }

        .testimonial-author {
            color: var(--text-muted);
            font-weight: 600;
            font-size: 0.9rem;
        }

        .testimonial-author span {
            color: var(--accent-gold);
        }

        /* ===== FAQ ===== */
        .faq-list {
            margin-top: 32px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item.open {
            border-color: var(--border-gold);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: none;
            border: none;
            color: var(--text-white);
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1.05rem;
            line-height: 1.4;
        }

        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-gold);
            flex-shrink: 0;
            margin-left: 12px;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 22px 18px;
            color: var(--text-muted);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, #0E3823, #123E25);
            border-top: 1px solid var(--border-soft);
            padding: 70px 0;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .cta-form {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .cta-form input {
            flex: 1;
            padding: 14px 18px;
            border-radius: 10px;
            border: 1px solid var(--border-gold);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-white);
        }

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

        .cta-form button {
            flex-shrink: 0;
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            padding: 14px 28px;
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .cta-form button:hover {
            background: var(--accent-gold-hover);
            transform: translateY(-2px);
        }

        .cta-note {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-top: 10px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #061F13;
            border-top: 1px solid var(--border-soft);
            padding: 60px 0 24px;
            margin-top: 40px;
        }

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

        .footer-brand p {
            color: var(--text-muted);
            margin-top: 12px;
            font-size: 0.95rem;
        }

        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 16px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-pale);
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .footer-social a:hover {
            background: var(--accent-gold);
            color: #0A2E1C;
        }

        .footer-col h4 {
            color: var(--accent-gold);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 700;
        }

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

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

        .footer-col a {
            color: var(--text-muted);
            font-size: 0.95rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

        .footer-bottom a:hover {
            color: var(--accent-gold);
        }

        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .hero-grid,
            .value-grid,
            .usage-grid,
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .testimonial-list {
                grid-template-columns: 1fr;
            }

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

        @media (max-width: 768px) {
            .hero {
                padding: 100px 0 50px;
            }

            .hero-title {
                font-size: 2.2rem;
            }

            .hero-subtitle {
                font-size: 1.05rem;
            }

            .section {
                padding: 50px 0;
            }

            .cta-form {
                flex-direction: column;
            }

            .cta-form button {
                width: 100%;
            }
        }

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

            .nav-wrapper {
                height: 64px;
            }

            .nav-links {
                top: 64px;
            }

            .nav-logo {
                font-size: 1rem;
            }

            .nav-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }

            .nav-actions {
                gap: 4px;
            }

            .nav-login {
                padding: 6px 8px;
                font-size: 0.85rem;
            }

            .nav-signup {
                padding: 8px 12px;
                font-size: 0.85rem;
            }

            .btn {
                padding: 12px 20px;
                font-size: 0.95rem;
            }

            .steps-grid,
            .stats-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-col {
                margin-bottom: 0;
            }
        }

/* roulang page: article */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #0E3823;
            --tertiary-bg: #123E25;
            --accent-gold: #FFD700;
            --accent-gold-hover: #E6C200;
            --accent-soft: #FFF3C4;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #A8CBC0;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-soft: rgba(255, 255, 255, 0.1);
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-bg-hover: rgba(255, 255, 255, 0.08);
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-xxl: 80px;
            --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-fast: 0.18s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-white);
            background: var(--primary-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-gold-hover);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul, ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-soft);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 46, 28, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: -0.01em;
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-gold) 0%, #B8860B 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #0A2E1C;
            flex-shrink: 0;
        }
        .nav-logo span {
            color: var(--accent-gold);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            flex: 1;
            justify-content: center;
        }
        .nav-links li {
            position: relative;
        }
        .nav-links a {
            display: block;
            padding: 8px 16px;
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
        }
        .nav-links a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.1);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-login {
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-login:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-signup {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 0.92rem;
            padding: 10px 22px;
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-signup:hover {
            background: var(--accent-gold-hover);
            transform: translateY(-1px);
            color: #0A2E1C;
        }
        .nav-toggle {
            display: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition-fast);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Article Hero / Banner ===== */
        .article-hero {
            position: relative;
            padding: 120px 0 50px;
            background: linear-gradient(180deg, rgba(10, 46, 28, 0.85) 0%, rgba(10, 46, 28, 0.95) 100%), url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            background-attachment: fixed;
            border-bottom: 1px solid var(--border-soft);
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
            opacity: 0.6;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 0.85rem;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent-gold);
        }
        .breadcrumb .separator {
            color: var(--border-gold);
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: var(--accent-gold);
            font-weight: 600;
        }
        .article-category-badge {
            display: inline-block;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            max-width: 850px;
        }
        .article-hero .article-excerpt {
            font-size: 1.1rem;
            color: var(--text-pale);
            max-width: 720px;
            margin-bottom: 20px;
            line-height: 1.65;
        }
        .article-meta-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            margin-bottom: 24px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .article-meta-bar span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-bar i {
            color: var(--accent-gold);
            font-size: 0.85rem;
        }
        .article-actions-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .btn-gold {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 13px 32px;
            border-radius: 12px;
            transition: background var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .btn-gold:hover {
            background: var(--accent-gold-hover);
            transform: translateY(-2px);
            color: #0A2E1C;
        }
        .btn-outline-gold {
            background: transparent;
            border: 2px solid var(--border-gold);
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: 12px;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .btn-outline-gold:hover {
            background: rgba(255, 215, 0, 0.08);
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }

        /* ===== Article Content Section ===== */
        .article-content-section {
            padding: 60px 0 80px;
            background: var(--primary-bg);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
            position: relative;
        }
        .article-main-content {
            min-width: 0;
        }
        .article-cover-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 32px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-soft);
        }
        .article-cover-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }
        .article-body-content {
            font-size: 1.02rem;
            line-height: 1.7;
            color: var(--text-pale);
        }
        .article-body-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 36px 0 16px;
            padding-left: 16px;
            border-left: 4px solid var(--accent-gold);
            line-height: 1.3;
        }
        .article-body-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 28px 0 12px;
            line-height: 1.35;
        }
        .article-body-content p {
            margin-bottom: 16px;
        }
        .article-body-content ul,
        .article-body-content ol {
            margin: 12px 0 20px 24px;
            list-style: none;
        }
        .article-body-content ul li {
            position: relative;
            padding-left: 22px;
            margin-bottom: 10px;
        }
        .article-body-content ul li::before {
            content: '✦';
            position: absolute;
            left: 0;
            color: var(--accent-gold);
            font-size: 0.9rem;
        }
        .article-body-content ol li {
            padding-left: 8px;
            margin-bottom: 10px;
            counter-increment: item;
            position: relative;
        }
        .article-body-content ol {
            counter-reset: item;
        }
        .article-body-content ol li::before {
            content: counter(item);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            background: rgba(255, 215, 0, 0.15);
            border: 1px solid var(--border-gold);
            border-radius: 50%;
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 0.8rem;
            margin-right: 10px;
        }
        .article-body-content blockquote {
            background: var(--card-bg);
            border-left: 4px solid var(--accent-gold);
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--text-pale);
        }
        .article-body-content img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            border: 1px solid var(--border-soft);
        }
        .article-body-content a {
            color: var(--accent-gold);
            border-bottom: 1px solid var(--border-gold);
            transition: border-color var(--transition-fast), color var(--transition-fast);
        }
        .article-body-content a:hover {
            color: var(--accent-gold-hover);
            border-bottom-color: var(--accent-gold-hover);
        }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-widget {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px;
            margin-bottom: 24px;
            transition: border-color var(--transition);
        }
        .sidebar-widget:hover {
            border-color: var(--border-gold);
        }
        .sidebar-widget h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-soft);
        }
        .sidebar-info-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-soft);
            font-size: 0.9rem;
            color: var(--text-pale);
        }
        .sidebar-info-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .sidebar-info-item i {
            color: var(--accent-gold);
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
        }
        .sidebar-toc {
            padding: 0;
        }
        .sidebar-toc a {
            display: block;
            padding: 8px 0;
            color: var(--text-muted);
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-soft);
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }
        .sidebar-toc a:hover {
            color: var(--accent-gold);
            padding-left: 8px;
        }
        .sidebar-toc a:last-child {
            border-bottom: none;
        }

        /* ===== Tips Section ===== */
        .tips-section {
            padding: 70px 0;
            background: var(--secondary-bg);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .section-header p {
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.6;
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tip-card {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .tip-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-gold);
            box-shadow: var(--shadow-gold);
        }
        .tip-card-icon {
            width: 52px;
            height: 52px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }
        .tip-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .tip-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 70px 0;
            background: var(--primary-bg);
        }
        .faq-list {
            max-width: 850px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-gold);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-white);
            transition: color var(--transition-fast);
            text-align: left;
            width: 100%;
        }
        .faq-question:hover {
            color: var(--accent-gold);
        }
        .faq-question i.fa-chevron-down {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i.fa-chevron-down {
            transform: rotate(180deg);
            color: var(--accent-gold);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.65;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(180deg, rgba(10, 46, 28, 0.9) 0%, rgba(18, 62, 37, 0.95) 100%), url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            border-top: 1px solid var(--border-soft);
            text-align: center;
        }
        .cta-content {
            max-width: 650px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: var(--text-pale);
            margin-bottom: 28px;
            line-height: 1.65;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .btn-large-gold {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 800;
            font-size: 1.05rem;
            padding: 16px 40px;
            border-radius: 14px;
            transition: background var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-large-gold:hover {
            background: var(--accent-gold-hover);
            transform: translateY(-3px);
            color: #0A2E1C;
        }

        /* ===== No Article State ===== */
        .no-article {
            text-align: center;
            padding: 80px 24px;
        }
        .no-article h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-white);
        }
        .no-article p {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #061D12;
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-soft);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 14px;
            font-size: 1.05rem;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 16px;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .footer-social a:hover {
            background: rgba(255, 215, 0, 0.12);
            border-color: var(--border-gold);
            color: var(--accent-gold);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.88rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--accent-gold);
        }

        /* ===== FAB ===== */
        .fab-royal {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1A1A1A 0%, #0A0A0A 100%);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-gold);
            opacity: 0.7;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            transition: all var(--transition);
            animation: fabBreathe 2.5s ease-in-out infinite;
            cursor: pointer;
        }
        .fab-royal:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 6px 28px rgba(255, 215, 0, 0.45);
        }
        .fab-royal:active {
            transform: scale(0.95) translateY(2px);
        }
        .fab-royal .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 12px;
            height: 12px;
            background: #FF0044;
            border-radius: 50%;
            border: 2px solid #0A2E1C;
            animation: fabBlink 1.5s ease-in-out infinite;
        }
        @keyframes fabBreathe {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-3px);
            }
        }
        @keyframes fabBlink {
            0%, 100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-sidebar {
                position: static;
                order: -1;
            }
            .sidebar-widget {
                padding: 20px;
            }
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(10, 46, 28, 0.98);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-soft);
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-toggle {
                display: block;
            }
            .article-hero {
                padding: 100px 0 40px;
                background-attachment: scroll;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-hero .article-excerpt {
                font-size: 1rem;
            }
            .article-meta-bar {
                gap: 14px;
                font-size: 0.82rem;
            }
            .article-actions-row {
                flex-direction: column;
                gap: 10px;
            }
            .btn-gold,
            .btn-outline-gold {
                justify-content: center;
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .article-cover-image img {
                height: 240px;
            }
            .article-body-content {
                font-size: 0.95rem;
            }
            .article-body-content h2 {
                font-size: 1.3rem;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-large-gold {
                padding: 14px 32px;
                font-size: 0.95rem;
                justify-content: center;
                width: 100%;
                max-width: 340px;
            }
            .fab-royal {
                width: 48px;
                height: 48px;
                font-size: 1.1rem;
                left: 12px;
                bottom: 84px;
            }
        }
        @media (max-width: 520px) {
            .nav-wrapper {
                height: 64px;
                gap: 12px;
            }
            .nav-logo {
                font-size: 0.98rem;
                gap: 8px;
            }
            .nav-logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
            .nav-login {
                padding: 6px 10px;
                font-size: 0.85rem;
            }
            .nav-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
                border-radius: 8px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-meta-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                font-size: 0.8rem;
            }
            .article-cover-image img {
                height: 180px;
            }
            .tips-grid {
                gap: 16px;
            }
            .tip-card {
                padding: 20px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .article-category-badge {
                font-size: 0.7rem;
                padding: 5px 12px;
            }
        }

/* roulang page: category3 */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #0E3823;
            --tertiary-bg: #123E25;
            --accent-gold: #FFD700;
            --accent-gold-hover: #E6C200;
            --accent-soft: #FFF3C4;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #A8CBC0;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-soft: rgba(255, 255, 255, 0.1);
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-bg-hover: rgba(255, 255, 255, 0.08);
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-xxl: 80px;
            --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-fast: 0.18s ease;
        }

        /* roulang page: category3 */
        :root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #0E3823;
            --tertiary-bg: #123E25;
            --accent-gold: #FFD700;
            --accent-gold-hover: #E6C200;
            --accent-soft: #FFF3C4;
            --text-white: #FFFFFF;
            --text-pale: #D1F2EB;
            --text-muted: #A8CBC0;
            --border-gold: rgba(255, 215, 0, 0.35);
            --border-soft: rgba(255, 255, 255, 0.1);
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-bg-hover: rgba(255, 255, 255, 0.08);
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.25);
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-xxl: 80px;
            --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-fast: 0.18s ease;
        }

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

        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-white);
            background: var(--primary-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-soft);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(10, 46, 28, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: -0.01em;
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-gold) 0%, #B8860B 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #0A2E1C;
            flex-shrink: 0;
        }

        .nav-logo span {
            color: var(--accent-gold);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            flex: 1;
            justify-content: center;
        }

        .nav-links li {
            position: relative;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
        }

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

        .nav-links a.active {
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-login {
            color: var(--text-pale);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 8px;
            transition: color var(--transition-fast), background var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }

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

        .nav-signup {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 0.92rem;
            padding: 10px 22px;
            border-radius: 10px;
            transition: background var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
            box-shadow: var(--shadow-gold);
        }

        .nav-signup:hover {
            background: var(--accent-gold-hover);
            color: #0A2E1C;
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-soft);
            color: var(--text-white);
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 12px;
                font-size: 0.85rem;
            }
            .nav-login {
                font-size: 0.85rem;
                padding: 8px 10px;
            }
            .nav-signup {
                font-size: 0.85rem;
                padding: 10px 16px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrapper {
                height: 64px;
                gap: 12px;
            }
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(10, 46, 28, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-soft);
                display: none;
                z-index: 999;
                max-height: calc(100vh - 64px);
                overflow-y: auto;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                font-size: 1rem;
                text-align: left;
                width: 100%;
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-login {
                display: none;
            }
            .nav-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .nav-logo {
                font-size: 1rem;
            }
            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
        }

        /* ===== Hero Section ===== */
        .hero-category {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            padding: 140px 0 60px;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 46, 28, 0.85) 0%, rgba(10, 46, 28, 0.92) 50%, var(--primary-bg) 100%);
            z-index: 1;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 215, 0, 0.12);
            border: 1px solid var(--border-gold);
            color: var(--accent-gold);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .hero-badge i {
            font-size: 0.9rem;
        }

        .hero-category h1 {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-white);
            margin: 0 0 16px;
            letter-spacing: -0.02em;
            max-width: 800px;
        }

        .hero-category h1 span {
            color: var(--accent-gold);
            display: block;
            margin-top: 4px;
        }

        .hero-category .hero-desc {
            font-size: 1.12rem;
            color: var(--text-pale);
            max-width: 640px;
            line-height: 1.65;
            margin-bottom: 28px;
        }

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

        .btn-primary {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 12px;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: var(--shadow-gold);
        }

        .btn-primary:hover {
            background: var(--accent-gold-hover);
            color: #0A2E1C;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 215, 0, 0.25);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--border-soft);
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: 12px;
            transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        .hero-play-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.14);
            border: 2px solid var(--accent-gold);
            color: var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            cursor: pointer;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .hero-play-btn:hover {
            background: var(--accent-gold);
            color: #0A2E1C;
            transform: scale(1.05);
            box-shadow: 0 0 24px rgba(255, 215, 0, 0.4);
        }

        @media (max-width: 768px) {
            .hero-category {
                min-height: auto;
                padding: 110px 0 50px;
            }
            .hero-category h1 {
                font-size: 1.9rem;
            }
            .hero-category .hero-desc {
                font-size: 1rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 22px;
                font-size: 0.92rem;
            }
            .hero-actions {
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .hero-category h1 {
                font-size: 1.6rem;
            }
            .hero-category .hero-desc {
                font-size: 0.95rem;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
        }

        /* ===== Section Base ===== */
        .section {
            padding: 60px 0;
        }
        .section-alt {
            background: var(--secondary-bg);
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-tag {
            display: inline-block;
            color: var(--accent-gold);
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 12px;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .section {
                padding: 44px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.98rem;
            }
        }

        /* ===== Device Cards ===== */
        .device-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .device-card {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
            position: relative;
            overflow: hidden;
            text-decoration: none;
            display: block;
        }
        .device-card:hover {
            background: var(--card-bg-hover);
            border-color: var(--border-gold);
            transform: translateY(-4px);
            box-shadow: var(--shadow-gold);
        }
        .device-card-icon {
            width: 54px;
            height: 54px;
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 215, 0, 0.05) 100%);
            border: 1px solid var(--border-gold);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }
        .device-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 8px;
        }
        .device-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }
        .device-card .device-tag {
            display: inline-block;
            margin-top: 14px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-gold);
            background: rgba(255, 215, 0, 0.1);
            padding: 4px 14px;
            border-radius: 50px;
            letter-spacing: 0.02em;
        }

        @media (max-width: 1024px) {
            .device-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 650px) {
            .device-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .device-card {
                padding: 22px;
            }
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-item {
            text-align: left;
            padding: 24px;
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            position: relative;
        }
        .step-item:hover {
            background: var(--card-bg-hover);
            border-color: var(--border-gold);
            transform: translateY(-2px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
        }
        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 8px;
            line-height: 1.35;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .step-item {
                padding: 20px;
            }
        }

        /* ===== Benefits Compare ===== */
        .benefits-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .benefit-panel {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-lg);
            padding: 28px;
        }
        .benefit-panel.gold {
            border-color: var(--border-gold);
            background: rgba(255, 215, 0, 0.04);
        }
        .benefit-panel h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .benefit-panel h3 i {
            color: var(--accent-gold);
        }
        .benefit-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .benefit-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 0.95rem;
            color: var(--text-pale);
            line-height: 1.55;
            border-bottom: 1px solid var(--border-soft);
        }
        .benefit-list li:last-child {
            border-bottom: none;
        }
        .benefit-list li i {
            color: var(--accent-gold);
            font-size: 0.9rem;
            margin-top: 4px;
            flex-shrink: 0;
        }
        .benefit-list li i.fa-xmark {
            color: #ff6b6b;
        }

        @media (max-width: 768px) {
            .benefits-wrapper {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .benefit-panel {
                padding: 22px;
            }
        }

        /* ===== Tips Box ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .tip-card {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .tip-card:hover {
            background: var(--card-bg-hover);
            border-color: var(--border-gold);
            transform: translateY(-3px);
        }
        .tip-card .tip-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-gold);
            margin-bottom: 14px;
        }
        .tip-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 8px;
        }
        .tip-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }
        @media (max-width: 1024px) {
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .tip-card {
                padding: 20px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition), background var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(255, 215, 0, 0.25);
            background: var(--card-bg-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-gold);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--accent-gold);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
            padding: 0 22px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.65;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--tertiary-bg) 0%, var(--secondary-bg) 100%);
            padding: 60px 0;
            border-top: 1px solid var(--border-gold);
            border-bottom: 1px solid var(--border-gold);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-pale);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        @media (max-width: 520px) {
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-buttons .btn-primary,
            .cta-buttons .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #072116;
            border-top: 1px solid var(--border-soft);
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 14px;
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 18px;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-pale);
            font-size: 0.9rem;
            transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
            text-decoration: none;
        }
        .footer-social a:hover {
            background: var(--accent-gold);
            color: #0A2E1C;
            border-color: var(--accent-gold);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-bottom p {
            font-size: 0.83rem;
            color: var(--text-muted);
            margin: 0;
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-bottom-links a {
            font-size: 0.83rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-bottom-links a:hover {
            color: var(--accent-gold);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: span 2;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom-links {
                justify-content: center;
            }
        }

        /* ===== Floating Action Button (Classic & Royal Style) ===== */
        .fab-royal {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1C1C1E 0%, #0A0A0A 100%);
            border: 3px solid var(--accent-gold);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3), inset 0 1px 2px rgba(255, 215, 0, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0.7;
            transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
            animation: fabFloat 3s ease-in-out infinite;
            position: fixed;
        }
        .fab-royal:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 32px rgba(255, 215, 0, 0.45), inset 0 1px 3px rgba(255, 215, 0, 0.25);
        }
        .fab-royal:active {
            transform: scale(0.95) translateY(2px);
        }
        .fab-royal .fab-icon {
            font-size: 1.4rem;
            color: var(--accent-gold);
            transition: transform var(--transition);
        }
        .fab-royal:hover .fab-icon {
            transform: rotate(360deg);
        }
        .fab-notification {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #D32F2F;
            border: 2px solid #0A2E1C;
            animation: fabBlink 1.5s ease-in-out infinite;
        }
        @keyframes fabFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        @keyframes fabBlink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        @media (max-width: 520px) {
            .fab-royal {
                width: 48px;
                height: 48px;
                left: 12px;
                bottom: 80px;
                min-width: 48px;
                min-height: 48px;
            }
            .fab-royal .fab-icon {
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
        --primary-bg: #0A2E1C;
        --secondary-bg: #0E3823;
        --tertiary-bg: #123E25;
        --accent-gold: #FFD700;
        --accent-gold-hover: #E6C200;
        --accent-soft: #FFF3C4;
        --text-white: #FFFFFF;
        --text-pale: #D1F2EB;
        --text-muted: #A8CBC0;
        --border-gold: rgba(255, 215, 0, 0.35);
        --border-soft: rgba(255, 255, 255, 0.1);
        --card-bg: rgba(255, 255, 255, 0.04);
        --card-bg-hover: rgba(255, 255, 255, 0.08);
        --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.25);
        --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
        --radius-sm: 10px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --radius-xl: 32px;
        --spacing-xs: 8px;
        --spacing-sm: 16px;
        --spacing-md: 24px;
        --spacing-lg: 40px;
        --spacing-xl: 60px;
        --spacing-xxl: 80px;
        --font-primary: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
        --font-heading: 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', sans-serif;
        --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --transition-fast: 0.18s ease;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    body {
        font-family: var(--font-primary);
        font-size: 16px;
        line-height: 1.6;
        color: var(--text-white);
        background: var(--primary-bg);
        min-height: 100vh;
        overflow-x: hidden;
        margin: 0;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: var(--accent-gold);
        text-decoration: none;
        transition: color var(--transition-fast);
    }
    a:hover {
        color: var(--accent-gold-hover);
    }
    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
        color: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }
    @media (max-width: 767px) {
        .container { padding: 0 16px; }
    }
    /* Header / Navigation */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(10, 46, 28, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border-soft);
        transition: background var(--transition), box-shadow var(--transition);
    }
    .site-header.scrolled {
        background: rgba(10, 46, 28, 0.98);
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    }
    .nav-wrapper {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 20px;
    }
    .nav-logo {
        flex-shrink: 0;
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-white);
        font-weight: 700;
        font-size: 1.15rem;
        letter-spacing: -0.01em;
        text-decoration: none;
        white-space: nowrap;
    }
    .nav-logo-icon {
        width: 40px;
        height: 40px;
        background: linear-gradient(135deg, var(--accent-gold) 0%, #B8860B 100%);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        color: #0A2E1C;
        flex-shrink: 0;
    }
    .nav-logo span { color: var(--accent-gold); }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
        list-style: none;
        flex: 1;
        justify-content: center;
        margin: 0;
        padding: 0;
    }
    .nav-links li { position: relative; }
    .nav-links a {
        display: block;
        padding: 8px 16px;
        color: var(--text-pale);
        font-size: 0.92rem;
        font-weight: 500;
        border-radius: 8px;
        white-space: nowrap;
        transition: color var(--transition-fast), background var(--transition-fast);
        text-decoration: none;
    }
    .nav-links a:hover { color: var(--text-white); background: rgba(255, 255, 255, 0.06); }
    .nav-links a.active { color: var(--accent-gold); background: rgba(255, 215, 0, 0.1); }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .nav-login {
        color: var(--text-pale);
        font-size: 0.92rem;
        font-weight: 500;
        padding: 8px 14px;
        border-radius: 8px;
        transition: color var(--transition-fast), background var(--transition-fast);
        text-decoration: none;
        white-space: nowrap;
    }
    .nav-login:hover { color: var(--text-white); background: rgba(255, 255, 255, 0.06); }
    .nav-signup {
        background: var(--accent-gold);
        color: #0A2E1C;
        font-weight: 700;
        font-size: 0.92rem;
        padding: 10px 22px;
        border-radius: 10px;
        text-decoration: none;
        transition: background var(--transition-fast), transform var(--transition-fast);
        white-space: nowrap;
    }
    .nav-signup:hover { background: var(--accent-gold-hover); transform: translateY(-2px); }
    .nav-toggle {
        display: none;
        font-size: 1.6rem;
        color: var(--text-white);
        background: none;
        border: none;
        padding: 8px;
        cursor: pointer;
        transition: color var(--transition-fast);
    }
    .nav-toggle:hover { color: var(--accent-gold); }
    @media (max-width: 992px) {
        .nav-links { display: none; }
        .nav-actions .nav-login, .nav-actions .nav-signup { display: none; }
        .nav-toggle { display: block; }
        .nav-links.open {
            display: flex;
            flex-direction: column;
            align-items: stretch;
            gap: 4px;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(10, 46, 28, 0.98);
            border-bottom: 1px solid var(--border-soft);
            padding: 16px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }
        .nav-links.open li { width: 100%; }
        .nav-links.open a { padding: 12px 16px; border-radius: 8px; display: block; }
        .nav-actions.mobile-show { display: flex; }
    }
    @media (max-width: 767px) {
        .nav-wrapper { height: 64px; }
        .nav-logo { font-size: 1rem; }
        .nav-logo-icon { width: 34px; height: 34px; font-size: 1rem; }
        .nav-links.open { top: 64px; padding: 12px 16px; }
    }
    /* Buttons */
    .btn {
        display: inline-block;
        padding: 12px 28px;
        border-radius: 10px;
        font-weight: 700;
        font-size: 1rem;
        text-align: center;
        transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
        cursor: pointer;
        border: none;
        text-decoration: none;
    }
    .btn-gold {
        background: var(--accent-gold);
        color: #0A2E1C;
        box-shadow: var(--shadow-gold);
    }
    .btn-gold:hover { background: var(--accent-gold-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255, 215, 0, 0.25); }
    .btn-outline {
        background: transparent;
        color: var(--accent-gold);
        border: 1px solid var(--border-gold);
    }
    .btn-outline:hover { background: rgba(255, 215, 0, 0.1); border-color: var(--accent-gold); transform: translateY(-2px); }
    /* Hero */
    .hero {
        padding: 160px 0 80px;
        position: relative;
        background: linear-gradient(135deg, #0B3C25 0%, #062315 100%);
        overflow: hidden;
    }
    .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
        opacity: 0.15;
        z-index: 0;
    }
    .hero .container { position: relative; z-index: 1; }
    .hero-grid {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 60px;
        align-items: center;
    }
    @media (max-width: 992px) {
        .hero-grid { grid-template-columns: 1fr; gap: 40px; }
        .hero { padding: 120px 0 60px; }
    }
    .hero-content h1 {
        font-size: 3rem;
        font-weight: 700;
        line-height: 1.2;
        margin: 0 0 20px;
        color: var(--text-white);
    }
    .hero-content h1 span { color: var(--accent-gold); }
    @media (max-width: 767px) {
        .hero-content h1 { font-size: 2.2rem; }
    }
    .hero-subtitle {
        font-size: 1.2rem;
        color: var(--text-pale);
        margin: 0 0 30px;
        line-height: 1.6;
    }
    .hero-btns { display: flex; flex-wrap: wrap; gap: 16px; }
    .hero-image {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid var(--border-gold);
        border-radius: var(--radius-xl);
        overflow: hidden;
        box-shadow: var(--shadow-soft);
    }
    .hero-image img { width: 100%; height: 380px; object-fit: cover; }
    @media (max-width: 767px) {
        .hero-image img { height: 240px; }
    }
    /* Section general */
    .section {
        padding: 80px 0;
    }
    .section-alt { background: var(--secondary-bg); }
    .section-heading {
        text-align: left;
        max-width: 700px;
        margin-bottom: 40px;
    }
    .section-heading h2 {
        font-size: 2.2rem;
        font-weight: 700;
        margin: 0 0 12px;
        color: var(--text-white);
    }
    .section-heading p {
        color: var(--text-muted);
        font-size: 1.05rem;
        line-height: 1.6;
        margin: 0;
    }
    @media (max-width: 767px) {
        .section-heading h2 { font-size: 1.8rem; }
        .section { padding: 60px 0; }
    }
    /* Tips cards */
    .tips-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 20px;
    }
    @media (max-width: 992px) {
        .tips-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 767px) {
        .tips-grid { grid-template-columns: 1fr; }
    }
    .tip-card {
        background: var(--card-bg);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-md);
        padding: 28px;
        transition: border-color var(--transition), background var(--transition), transform var(--transition);
    }
    .tip-card:hover {
        border-color: var(--border-gold);
        background: var(--card-bg-hover);
        transform: translateY(-6px);
    }
    .tip-icon {
        width: 56px;
        height: 56px;
        background: rgba(255, 215, 0, 0.12);
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        color: var(--accent-gold);
        margin-bottom: 20px;
    }
    .tip-card h3 {
        font-size: 1.3rem;
        margin: 0 0 10px;
        color: var(--text-white);
    }
    .tip-card p {
        color: var(--text-pale);
        margin: 0;
        line-height: 1.6;
    }
    /* Steps */
    .steps-list {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }
    .step-item {
        display: flex;
        gap: 20px;
        align-items: flex-start;
    }
    .step-num {
        width: 48px;
        height: 48px;
        background: var(--accent-gold);
        color: #0A2E1C;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 1.3rem;
        flex-shrink: 0;
    }
    .step-content h3 {
        margin: 0 0 6px;
        font-size: 1.2rem;
        color: var(--text-white);
    }
    .step-content p {
        margin: 0;
        color: var(--text-muted);
    }
    /* Benefits */
    .benefits-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }
    @media (max-width: 992px) {
        .benefits-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 767px) {
        .benefits-grid { grid-template-columns: 1fr; }
    }
    .benefit {
        text-align: left;
        padding: 20px;
        border-left: 3px solid var(--accent-gold);
        background: rgba(255, 255, 255, 0.03);
        border-radius: 8px;
    }
    .benefit h4 {
        margin: 0 0 8px;
        color: var(--accent-gold);
        font-size: 1.1rem;
    }
    .benefit p {
        margin: 0;
        color: var(--text-pale);
        font-size: 0.95rem;
    }
    /* FAQ */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
    }
    .faq-item {
        border-bottom: 1px solid var(--border-soft);
        padding: 20px 0;
    }
    .faq-item:first-child { border-top: 1px solid var(--border-soft); }
    .faq-question {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--text-white);
        margin: 0 0 8px;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: color var(--transition-fast);
    }
    .faq-question:hover { color: var(--accent-gold); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
        color: var(--text-muted);
        line-height: 1.6;
    }
    .faq-item.open .faq-answer { max-height: 200px; }
    .faq-icon {
        font-size: 1rem;
        color: var(--accent-gold);
        transition: transform var(--transition-fast);
    }
    .faq-item.open .faq-icon { transform: rotate(180deg); }
    /* CTA */
    .cta-section {
        background: linear-gradient(135deg, var(--tertiary-bg), #0B3C25);
        padding: 80px 0;
        text-align: left;
    }
    .cta-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
    }
    .cta-text h2 {
        font-size: 2rem;
        margin: 0 0 12px;
    }
    .cta-text p {
        color: var(--text-muted);
        margin: 0;
        font-size: 1.05rem;
    }
    .cta-btns { display: flex; gap: 16px; flex-wrap: wrap; }
    /* Footer */
    .site-footer {
        background: var(--secondary-bg);
        border-top: 1px solid var(--border-soft);
        padding: 60px 0 30px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    @media (max-width: 992px) {
        .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 767px) {
        .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    }
    .footer-brand .nav-logo { margin-bottom: 16px; }
    .footer-brand p {
        color: var(--text-muted);
        font-size: 0.95rem;
        line-height: 1.6;
        margin: 0 0 20px;
    }
    .footer-social { display: flex; gap: 12px; }
    .footer-social a {
        width: 38px;
        height: 38px;
        background: rgba(255, 255, 255, 0.06);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-pale);
        transition: background var(--transition-fast), color var(--transition-fast);
    }
    .footer-social a:hover { background: var(--accent-gold); color: #0A2E1C; }
    .footer-col h4 {
        color: var(--text-white);
        font-size: 1.1rem;
        margin: 0 0 16px;
    }
    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .footer-col li { margin-bottom: 10px; }
    .footer-col a {
        color: var(--text-muted);
        font-size: 0.95rem;
        text-decoration: none;
        transition: color var(--transition-fast);
    }
    .footer-col a:hover { color: var(--accent-gold); }
    .footer-bottom {
        border-top: 1px solid var(--border-soft);
        padding-top: 20px;
        text-align: center;
        color: var(--text-muted);
        font-size: 0.85rem;
    }
    /* FAB */
    .fab {
        position: fixed;
        left: 16px;
        bottom: 96px;
        z-index: 50;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: linear-gradient(135deg, #B8860B, #FFD700);
        border: 2px solid var(--accent-gold);
        box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.4rem;
        color: #0A2E1C;
        cursor: pointer;
        opacity: 0.7;
        transition: opacity var(--transition-fast), transform var(--transition-fast);
        animation: fab-breathe 3s ease-in-out infinite;
        text-decoration: none;
    }
    .fab:hover { opacity: 1; transform: scale(1.1) rotate(360deg); }
    .fab:active { transform: scale(0.95) translateY(1px); }
    @keyframes fab-breathe {
        0%, 100% { box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3); }
        50% { box-shadow: 0 4px 28px rgba(255, 215, 0, 0.5); }
    }
    /* Responsive extras */
    @media (max-width: 767px) {
        .hero-btns { flex-direction: column; align-items: stretch; }
        .btn { width: 100%; }
        .cta-inner { flex-direction: column; text-align: left; }
        .cta-btns { width: 100%; }
    }