/* roulang page: index */
:root {
            --color-primary: #0F3D3E;
            --color-primary-dark: #0A2F30;
            --color-primary-light: #1A5A5B;
            --color-accent: #E8B84B;
            --color-accent-dark: #D4A23A;
            --color-accent-soft: #FBF3DE;
            --color-bg: #F7F5F0;
            --color-surface: #FFFFFF;
            --color-surface-alt: #F1EFE9;
            --color-text: #1C1C1C;
            --color-text-strong: #141414;
            --color-text-muted: #5F6B6A;
            --color-text-light: #8A9291;
            --color-border: #E2E0D8;
            --color-border-strong: #D0CEC5;
            --color-success: #3B7A57;
            --color-success-bg: #EDF5F0;
            --color-warning: #A9701F;
            --color-warning-bg: #FDF6E9;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(19, 25, 24, 0.05);
            --shadow-sm: 0 2px 8px rgba(19, 25, 24, 0.07);
            --shadow-md: 0 8px 24px rgba(19, 25, 24, 0.09);
            --shadow-lg: 0 16px 48px rgba(19, 25, 24, 0.12);
            --shadow-focus: 0 0 0 4px rgba(15, 61, 62, 0.22);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
            --container-max: 1180px;
            --container-pad: 24px;
            --section-gap: 88px;
            --section-gap-mobile: 56px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --transition-slow: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.65;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: background-color var(--transition-base);
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--color-text-strong);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.015em;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(247, 245, 240, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 224, 216, 0.7);
            transition: box-shadow var(--transition-base), background-color var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
            background-color: rgba(247, 245, 240, 0.98);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.05rem;
            color: var(--color-text-strong);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .brand:hover {
            color: var(--color-primary);
        }
        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #FFF;
            border-radius: var(--radius-md);
            font-size: 0.85rem;
            font-weight: 700;
            flex-shrink: 0;
            letter-spacing: 0;
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }
        .brand-text strong {
            font-size: 0.95rem;
            font-weight: 800;
            letter-spacing: -0.01em;
        }
        .brand-text span {
            font-size: 0.68rem;
            font-weight: 500;
            color: var(--color-text-muted);
            letter-spacing: 0.02em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: inline-block;
            padding: 10px 18px;
            font-size: 0.9rem;
            font-weight: 550;
            color: var(--color-text-muted);
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--color-text-strong);
            background-color: rgba(15, 61, 62, 0.06);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background-color: rgba(15, 61, 62, 0.1);
            font-weight: 650;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast);
        }
        .nav-toggle:hover {
            background-color: rgba(15, 61, 62, 0.06);
        }
        .nav-toggle .bar {
            width: 24px;
            height: 2.5px;
            background: var(--color-text-strong);
            border-radius: 2px;
            transition: all var(--transition-base);
        }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 88px 0 72px;
            overflow: hidden;
            background: radial-gradient(ellipse at 20% 20%, rgba(232, 184, 75, 0.12) 0%, transparent 55%),
                        radial-gradient(ellipse at 85% 75%, rgba(15, 61, 62, 0.1) 0%, transparent 60%),
                        linear-gradient(180deg, #F7F5F0 0%, #F2F0E8 100%);
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(232, 184, 75, 0.15) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(15, 61, 62, 0.1) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }
        .hero-content {
            max-width: 640px;
        }
        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.03em;
            text-transform: uppercase;
            margin-bottom: 22px;
            box-shadow: var(--shadow-xs);
        }
        .hero-eyebrow .dot {
            width: 7px;
            height: 7px;
            background: var(--color-accent);
            border-radius: 50%;
            flex-shrink: 0;
            animation: pulse-dot 2.2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
        }
        .hero h1 {
            font-size: 2.9rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 20px;
            color: var(--color-text-strong);
        }
        .hero h1 .highlight {
            color: var(--color-primary);
            position: relative;
            display: inline-block;
        }
        .hero h1 .highlight::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            width: 100%;
            height: 6px;
            background: rgba(232, 184, 75, 0.4);
            border-radius: 4px;
            z-index: -1;
        }
        .hero-sub {
            font-size: 1.12rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 540px;
            font-weight: 450;
        }
        .hero-sub strong {
            color: var(--color-text-strong);
            font-weight: 650;
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 36px;
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-stat .stat-value {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--color-text-strong);
            letter-spacing: -0.02em;
        }
        .hero-stat .stat-label {
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--color-text-muted);
            letter-spacing: 0.02em;
        }

        .hero-visual {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .hero-visual-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px 26px;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .hero-visual-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }
        .hvc-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }
        .hvc-header .label {
            font-size: 0.72rem;
            font-weight: 650;
            color: var(--color-text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }
        .hvc-header .live-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--color-success);
            background: var(--color-success-bg);
            padding: 4px 10px;
            border-radius: var(--radius-full);
        }
        .hvc-header .live-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--color-success);
            border-radius: 50%;
            animation: pulse-dot 1.8s ease-in-out infinite;
        }
        .cluster-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .cluster-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            background: var(--color-surface-alt);
            border-radius: var(--radius-md);
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }
        .cluster-item:hover {
            border-color: var(--color-border-strong);
            background: var(--color-surface);
        }
        .cluster-item .ci-icon {
            width: 32px;
            height: 32px;
            background: var(--color-primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 0.75rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .cluster-item .ci-info {
            flex: 1;
            min-width: 0;
        }
        .cluster-item .ci-info .ci-name {
            font-size: 0.85rem;
            font-weight: 650;
            color: var(--color-text-strong);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .cluster-item .ci-info .ci-desc {
            font-size: 0.72rem;
            color: var(--color-text-muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .cluster-item .ci-status {
            font-size: 0.7rem;
            font-weight: 650;
            color: var(--color-success);
            flex-shrink: 0;
        }
        .cluster-item .ci-status.warn {
            color: var(--color-warning);
        }
        .hvc-footer {
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }
        .hvc-footer .trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--color-success);
            font-weight: 650;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.92rem;
            font-weight: 650;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
            text-align: center;
            white-space: nowrap;
            min-height: 48px;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #FFF;
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: #FFF;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }
        .btn-accent {
            background: var(--color-accent);
            color: var(--color-text-strong);
            box-shadow: var(--shadow-sm);
        }
        .btn-accent:hover {
            background: var(--color-accent-dark);
            color: var(--color-text-strong);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: var(--shadow-xs);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-text-strong);
            border: 1.5px solid var(--color-border-strong);
        }
        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(15, 61, 62, 0.04);
        }
        .btn-outline:active {
            background: rgba(15, 61, 62, 0.08);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 0.82rem;
            min-height: 38px;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 15px 34px;
            font-size: 1rem;
            min-height: 54px;
            border-radius: var(--radius-md);
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-alt {
            background: var(--color-surface-alt);
        }
        .section-header {
            max-width: 680px;
            margin-bottom: 48px;
        }
        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 650;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 750;
            letter-spacing: -0.02em;
            line-height: 1.22;
            margin-bottom: 14px;
        }
        .section-header p {
            font-size: 1rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== Benefits Cards ===== */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .benefit-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 26px;
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .benefit-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--color-accent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .benefit-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--color-border-strong);
        }
        .benefit-card:hover::before {
            opacity: 1;
        }
        .benefit-icon {
            width: 48px;
            height: 48px;
            background: var(--color-primary);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #FFF;
            flex-shrink: 0;
            transition: background var(--transition-fast);
        }
        .benefit-card:hover .benefit-icon {
            background: var(--color-primary-dark);
        }
        .benefit-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .benefit-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }
        .benefit-card .benefit-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-size: 0.85rem;
            font-weight: 650;
            color: var(--color-primary);
            transition: gap var(--transition-fast);
        }
        .benefit-card .benefit-link:hover {
            gap: 10px;
            color: var(--color-primary-dark);
        }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            counter-increment: step-counter;
            position: relative;
            transition: all var(--transition-base);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--color-accent-soft);
            color: var(--color-primary);
            border-radius: var(--radius-full);
            font-weight: 800;
            font-size: 0.95rem;
            margin-bottom: 16px;
            border: 2px solid rgba(232, 184, 75, 0.35);
        }
        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.68;
        }

        /* ===== CMS Posts / Latest Updates ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 22px;
        }
        .post-card-link {
            display: block;
            text-decoration: none;
            color: inherit;
            height: 100%;
        }
        .post-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--color-border-strong);
        }
        .post-card .post-category {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 650;
            color: var(--color-primary);
            background: rgba(15, 61, 62, 0.08);
            padding: 4px 10px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            align-self: flex-start;
        }
        .post-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
            letter-spacing: -0.01em;
            color: var(--color-text-strong);
        }
        .post-card:hover h3 {
            color: var(--color-primary);
        }
        .post-card .post-summary {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 14px;
        }
        .post-card .post-date {
            font-size: 0.75rem;
            color: var(--color-text-light);
            font-weight: 500;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }
        .cms-empty {
            text-align: center;
            padding: 40px 24px;
            background: var(--color-surface);
            border: 1px dashed var(--color-border-strong);
            border-radius: var(--radius-lg);
            color: var(--color-text-muted);
            font-size: 0.95rem;
            font-weight: 500;
        }

        /* ===== Social Proof / Testimonial ===== */
        .testimonial-wrap {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .testimonial-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-xs);
            position: relative;
            transition: all var(--transition-base);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .testimonial-card .quote-mark {
            font-size: 2.5rem;
            line-height: 1;
            color: var(--color-accent);
            font-weight: 800;
            font-family: Georgia, 'Times New Roman', serif;
            margin-bottom: 12px;
            display: block;
        }
        .testimonial-card blockquote {
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--color-text);
            margin-bottom: 18px;
            font-style: normal;
        }
        .testimonial-card blockquote strong {
            color: var(--color-text-strong);
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-top: 16px;
            border-top: 1px solid var(--color-border);
        }
        .ta-avatar {
            width: 40px;
            height: 40px;
            background: var(--color-primary);
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-weight: 700;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .ta-info .ta-name {
            font-size: 0.88rem;
            font-weight: 650;
            color: var(--color-text-strong);
        }
        .ta-info .ta-role {
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border-strong);
        }
        .faq-item.open {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            width: 100%;
            text-align: left;
            font-size: 0.95rem;
            font-weight: 650;
            color: var(--color-text-strong);
            background: none;
            border: none;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            width: 26px;
            height: 26px;
            border-radius: var(--radius-sm);
            background: var(--color-surface-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            transition: all var(--transition-fast);
        }
        .faq-item.open .faq-question .faq-icon {
            background: var(--color-primary);
            color: #FFF;
            transform: rotate(45deg);
        }
        .faq-answer {
            display: none;
            padding: 0 22px 20px;
            font-size: 0.9rem;
            line-height: 1.7;
            color: var(--color-text-muted);
        }
        .faq-item.open .faq-answer {
            display: block;
            animation: fadeIn 0.25s ease;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-6px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 72px 0;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            border-radius: var(--radius-xl);
            margin: var(--section-gap) auto;
            max-width: var(--container-max);
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(232, 184, 75, 0.22) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 32px;
        }
        .cta-content h2 {
            color: #FFF;
            font-size: 2rem;
            font-weight: 750;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.82);
            font-size: 1rem;
            line-height: 1.7;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-content .btn-accent {
            background: var(--color-accent);
            color: var(--color-text-strong);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }
        .cta-content .btn-accent:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
        }
        .cta-note {
            margin-top: 16px;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.55);
            font-weight: 500;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1C2B2A;
            color: rgba(255, 255, 255, 0.72);
            padding: 56px 0 32px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .brand {
            color: #FFF;
            margin-bottom: 14px;
        }
        .footer-brand .brand:hover {
            color: var(--color-accent);
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            color: #FFF;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom .domain-info {
            font-family: var(--font-mono);
            font-size: 0.7rem;
            letter-spacing: 0.02em;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
            .hero-sub {
                font-size: 1.05rem;
            }
            .section-header h2 {
                font-size: 1.75rem;
            }
            .cta-content h2 {
                font-size: 1.7rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 64px;
                --container-pad: 18px;
            }
            .nav-wrap {
                min-height: 60px;
                flex-wrap: wrap;
            }
            .brand {
                font-size: 0.95rem;
            }
            .brand-mark {
                width: 32px;
                height: 32px;
                font-size: 0.75rem;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                background: var(--color-surface);
                border-bottom: 1px solid var(--color-border);
                padding: 12px 18px 18px;
                box-shadow: var(--shadow-md);
                z-index: 99;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                border-radius: var(--radius-md);
                font-size: 0.95rem;
                font-weight: 600;
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-links a.active {
                background: rgba(15, 61, 62, 0.1);
            }

            .hero {
                padding: 64px 0 56px;
            }
            .hero h1 {
                font-size: 1.95rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-stats-row {
                gap: 20px;
            }
            .hero-stat .stat-value {
                font-size: 1.2rem;
            }

            .section-header h2 {
                font-size: 1.55rem;
            }
            .section-header p {
                font-size: 0.92rem;
            }

            .benefits-grid,
            .steps-grid,
            .testimonial-wrap,
            .posts-grid {
                grid-template-columns: 1fr;
            }

            .cta-section {
                margin: 48px 0;
                padding: 52px 16px;
                border-radius: var(--radius-lg);
            }
            .cta-content h2 {
                font-size: 1.45rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.65rem;
                letter-spacing: -0.02em;
            }
            .hero-eyebrow {
                font-size: 0.68rem;
                padding: 4px 12px;
            }
            .hero-sub {
                font-size: 0.92rem;
            }
            .hero-cta-group .btn {
                width: 100%;
                font-size: 0.88rem;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.88rem;
                min-height: 44px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .section-tag {
                font-size: 0.68rem;
            }
            .benefit-card,
            .step-card,
            .testimonial-card,
            .post-card {
                padding: 20px 18px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.88rem;
            }
            .faq-answer {
                padding: 0 16px 16px;
                font-size: 0.85rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #0f3d5c;
            --primary-strong: #0a2b40;
            --primary-soft: #e7eef5;
            --accent: #e6a817;
            --accent-strong: #c78e0c;
            --accent-soft: #fdf6e3;
            --ink: #1a2634;
            --muted: #5d6b7d;
            --faint: #8b98a8;
            --surface: #ffffff;
            --surface-alt: #f6f8fb;
            --surface-dark: #0e2432;
            --border: #dce4ec;
            --border-strong: #c3cfdb;
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 1px 3px rgba(10, 43, 64, 0.06), 0 4px 12px rgba(10, 43, 64, 0.04);
            --shadow-md: 0 6px 24px rgba(10, 43, 64, 0.08), 0 2px 6px rgba(10, 43, 64, 0.05);
            --shadow-lg: 0 16px 48px rgba(10, 43, 64, 0.12), 0 4px 12px rgba(10, 43, 64, 0.06);
            --container: 1200px;
            --container-narrow: 860px;
            --space-1: 0.5rem;
            --space-2: 0.75rem;
            --space-3: 1rem;
            --space-4: 1.5rem;
            --space-5: 2rem;
            --space-6: 3rem;
            --space-7: 4rem;
            --space-8: 5rem;
        }

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

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            line-height: 1.65;
            color: var(--ink);
            background-color: var(--surface);
            font-size: 16px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        main {
            flex: 1 0 auto;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(230, 168, 23, 0.6);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

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

        /* ============ HEADER ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            min-height: 78px;
            padding-block: 12px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 14px;
            color: inherit;
            text-decoration: none;
            flex-shrink: 0;
        }

        .brand:hover {
            color: inherit;
        }

        .brand-mark {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            letter-spacing: -0.02em;
            box-shadow: 0 4px 14px rgba(15, 61, 92, 0.25);
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text strong {
            font-size: 16px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--primary-strong);
        }

        .brand-text span {
            font-size: 12px;
            color: var(--muted);
            font-weight: 500;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            border-radius: 8px;
            transition: background 0.2s ease;
        }

        .nav-toggle:hover {
            background: var(--primary-soft);
        }

        .nav-toggle .bar {
            width: 24px;
            height: 2.5px;
            background: var(--primary-strong);
            border-radius: 4px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .nav-toggle.open .bar:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }

        .nav-toggle.open .bar:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open .bar:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }

        .nav-links a {
            display: inline-block;
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--muted);
            text-decoration: none;
            transition: all 0.25s ease;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

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

        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(15, 61, 92, 0.22);
        }

        .nav-links a.active:hover {
            color: #fff;
            background: var(--primary-strong);
        }

        /* ============ ARTICLE HERO ============ */
        .article-hero {
            background: linear-gradient(180deg, #f4f8fc 0%, #ffffff 100%);
            border-bottom: 1px solid var(--border);
            padding: var(--space-7) 0 var(--space-6);
        }

        .article-hero-inner {
            max-width: var(--container-narrow);
            margin: 0 auto;
            padding-inline: 24px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: var(--space-4);
            font-size: 13px;
            font-weight: 500;
            color: var(--muted);
        }

        .breadcrumb a {
            color: var(--muted);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s ease;
        }

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

        .breadcrumb .sep {
            color: var(--faint);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        .article-hero .category-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-soft);
            color: var(--accent-strong);
            border: 1px solid #f0d68a;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: var(--space-4);
        }

        .article-hero .category-pill::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
        }

        .article-hero h1 {
            font-size: clamp(2rem, 5.5vw, 3.3rem);
            line-height: 1.15;
            font-weight: 900;
            letter-spacing: -0.03em;
            color: var(--primary-strong);
            margin-bottom: var(--space-4);
            text-wrap: balance;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: var(--muted);
            font-weight: 500;
            padding-top: var(--space-3);
            border-top: 1px solid var(--border);
        }

        .article-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .article-meta-item svg {
            flex-shrink: 0;
            opacity: 0.7;
        }

        /* ============ ARTICLE BODY ============ */
        .article-body-section {
            padding: var(--space-7) 0;
            background: var(--surface);
        }

        .article-prose {
            max-width: var(--container-narrow);
            margin: 0 auto;
            padding-inline: 24px;
            font-size: 17px;
            line-height: 1.8;
            color: #2a3748;
        }

        .article-prose h2 {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--primary-strong);
            margin: 2.5rem 0 1rem;
            line-height: 1.25;
        }

        .article-prose h3 {
            font-size: 1.4rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--primary-strong);
            margin: 2rem 0 0.75rem;
            line-height: 1.3;
        }

        .article-prose h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary-strong);
            margin: 1.5rem 0 0.5rem;
        }

        .article-prose p {
            margin-bottom: 1.25rem;
            color: #2a3748;
        }

        .article-prose ul,
        .article-prose ol {
            margin: 0 0 1.5rem;
            padding-left: 1.6rem;
            color: #2a3748;
        }

        .article-prose li {
            margin-bottom: 0.6rem;
        }

        .article-prose li::marker {
            color: var(--accent-strong);
            font-weight: 700;
        }

        .article-prose blockquote {
            margin: 2rem 0;
            padding: 1.5rem 2rem;
            background: var(--primary-soft);
            border-left: 5px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--primary-strong);
        }

        .article-prose blockquote p {
            margin-bottom: 0;
        }

        .article-prose a {
            color: var(--primary);
            text-decoration: underline;
            text-decoration-color: rgba(15, 61, 92, 0.3);
            text-underline-offset: 4px;
            transition: text-decoration-color 0.2s ease, color 0.2s ease;
        }

        .article-prose a:hover {
            color: var(--primary-strong);
            text-decoration-color: var(--primary);
        }

        .article-prose img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            margin: 2rem auto;
        }

        .article-prose code {
            background: var(--surface-alt);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 2px 8px;
            font-size: 0.9em;
            font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            color: var(--primary-strong);
        }

        .article-prose pre {
            background: var(--surface-dark);
            color: #e8edf2;
            padding: 1.5rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 14px;
            line-height: 1.6;
        }

        .article-prose pre code {
            background: none;
            border: none;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }

        .article-prose hr {
            border: none;
            height: 1px;
            background: var(--border);
            margin: 2.5rem 0;
        }

        .article-prose table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 15px;
        }

        .article-prose th,
        .article-prose td {
            padding: 12px 16px;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-prose th {
            background: var(--primary-soft);
            color: var(--primary-strong);
            font-weight: 700;
        }

        /* ============ NOT FOUND STATE ============ */
        .not-found-wrap {
            max-width: var(--container-narrow);
            margin: 0 auto;
            padding: var(--space-7) 24px;
            min-height: 400px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--space-4);
        }

        .not-found-wrap h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-strong);
            margin-bottom: var(--space-3);
        }

        .not-found-wrap p {
            color: var(--muted);
            max-width: 420px;
            margin-bottom: var(--space-5);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.01em;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            line-height: 1.2;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(15, 61, 92, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-strong);
            color: #fff;
            box-shadow: 0 8px 24px rgba(15, 61, 92, 0.3);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(230, 168, 23, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-strong);
            color: #fff;
            box-shadow: 0 8px 24px rgba(230, 168, 23, 0.35);
            transform: translateY(-2px);
        }

        /* ============ RELATED CTA ============ */
        .article-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
            padding: var(--space-7) 0;
            border-radius: var(--radius-xl);
            margin: var(--space-6) auto;
            max-width: var(--container-narrow);
            position: relative;
            overflow: hidden;
        }

        .article-cta::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(230, 168, 23, 0.08);
        }

        .article-cta::after {
            content: '';
            position: absolute;
            bottom: -50%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }

        .article-cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 0 24px;
        }

        .article-cta h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.2rem);
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: var(--space-3);
        }

        .article-cta p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            max-width: 520px;
            margin: 0 auto var(--space-5);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--surface-dark);
            color: rgba(255, 255, 255, 0.72);
            padding: var(--space-7) 0 var(--space-4);
            margin-top: var(--space-7);
            flex-shrink: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: var(--space-6);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-mark {
            background: rgba(255, 255, 255, 0.12);
            box-shadow: none;
            color: var(--accent);
        }

        .footer-brand .brand-text strong {
            color: #fff;
        }

        .footer-brand .brand-text span {
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-brand p {
            margin-top: var(--space-4);
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: #fff;
            margin-bottom: var(--space-3);
        }

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

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

        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s ease, padding-left 0.2s ease;
            display: inline-block;
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: var(--space-4);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .domain-info {
            background: rgba(255, 255, 255, 0.06);
            padding: 6px 14px;
            border-radius: 999px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.55);
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            :root {
                --space-7: 3rem;
                --space-8: 4rem;
            }

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

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                padding: 12px 24px 20px;
                gap: 4px;
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s ease;
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 14px 18px;
                border-radius: var(--radius-sm);
                font-size: 15px;
            }

            .article-hero {
                padding: var(--space-5) 0 var(--space-4);
            }

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

            .article-meta {
                gap: 12px;
                flex-direction: column;
                align-items: flex-start;
            }

            .article-prose {
                font-size: 16px;
                padding-inline: 20px;
            }

            .article-cta {
                margin: var(--space-5) 16px;
                border-radius: var(--radius-lg);
            }
        }

        @media (max-width: 520px) {
            .brand-text strong {
                font-size: 14px;
            }

            .brand-text span {
                font-size: 11px;
            }

            .brand-mark {
                width: 40px;
                height: 40px;
                font-size: 15px;
            }

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

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

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

            .article-prose h2 {
                font-size: 1.4rem;
            }

            .article-prose h3 {
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1a3c5e;
            --primary-dark: #102a44;
            --primary-light: #2a5786;
            --accent: #e07b39;
            --accent-hover: #c96a2c;
            --bg: #f7f9fc;
            --surface: #ffffff;
            --text: #1f2937;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-sm: 0 2px 8px rgba(15, 30, 50, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 30, 50, 0.08);
            --shadow-lg: 0 18px 48px rgba(15, 30, 50, 0.12);
            --transition: 200ms ease;
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1120px;
            --section-padding: 80px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

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

        /* Header */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 0 rgba(15, 30, 50, 0.04);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 70px;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text);
            flex-shrink: 0;
        }

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

        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 0.5px;
            border-radius: 10px;
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
        }

        .brand-text strong {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.2px;
        }

        .brand-text span {
            font-size: 11px;
            color: var(--text-muted);
            font-weight: 400;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 60, 94, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 60, 94, 0.08);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: transparent;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(26, 60, 94, 0.06);
        }

        .nav-toggle .bar {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-muted);
            font-weight: 500;
        }

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

        .breadcrumb .sep {
            color: var(--text-light);
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 600;
        }

        /* Hero */
        .hero-category {
            background: linear-gradient(165deg, #f7f9fc 0%, #eef4fb 40%, #eaf1f9 100%);
            padding: 72px 0 88px;
            border-bottom: 1px solid var(--border);
        }

        .hero-category .container {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 56px;
            align-items: center;
        }

        .hero-category .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(26, 60, 94, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 999px;
            margin-bottom: 20px;
        }

        .hero-category .hero-badge::before {
            content: '';
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
        }

        .hero-category h1 {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            letter-spacing: -1px;
            margin-bottom: 20px;
        }

        .hero-category .hero-desc {
            font-size: 17px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 580px;
            margin-bottom: 32px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 60, 94, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            color: #fff;
            box-shadow: 0 6px 20px rgba(26, 60, 94, 0.35);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(224, 123, 57, 0.25);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            box-shadow: 0 6px 20px rgba(224, 123, 57, 0.35);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .hero-visual .cluster-diagram {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 14px;
            width: 100%;
            max-width: 420px;
        }

        .cluster-node {
            background: var(--surface);
            border: 2px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px 16px;
            text-align: center;
            box-shadow: var(--shadow-md);
            transition: all var(--transition);
            min-height: 120px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .cluster-node:hover {
            border-color: var(--primary-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .cluster-node .node-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
        }

        .cluster-node .node-icon.blue {
            background: rgba(26, 60, 94, 0.1);
            color: var(--primary);
        }

        .cluster-node .node-icon.orange {
            background: rgba(224, 123, 57, 0.15);
            color: var(--accent);
        }

        .cluster-node .node-icon.green {
            background: rgba(34, 150, 100, 0.12);
            color: #1f8a5b;
        }

        .cluster-node .node-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--text);
        }

        .cluster-node .node-sub {
            font-size: 10px;
            color: var(--text-muted);
        }

        /* Sections */
        .section {
            padding: var(--section-padding) 0;
        }

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

        .section-head {
            max-width: 640px;
            margin-bottom: 48px;
        }

        .section-head .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .feature-card .card-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 22px;
        }

        .feature-card .card-icon.blue {
            background: rgba(26, 60, 94, 0.08);
            color: var(--primary);
        }

        .feature-card .card-icon.accent {
            background: rgba(224, 123, 57, 0.12);
            color: var(--accent);
        }

        .feature-card .card-icon.green {
            background: rgba(34, 150, 100, 0.1);
            color: #1f8a5b;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* Checklist */
        .checklist-block {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            box-shadow: var(--shadow-sm);
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px 36px;
        }

        .checklist-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .checklist-item .check {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(34, 150, 100, 0.12);
            color: #1f8a5b;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .checklist-item .label {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
        }

        .checklist-item .desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
            line-height: 1.6;
        }

        /* Process */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }

        .process-step {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
            box-shadow: var(--shadow-sm);
        }

        .process-step:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .process-step .step-number {
            counter-increment: step;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }

        .process-step .step-number::before {
            content: counter(step);
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .faq-item.active {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            font-family: inherit;
            color: var(--text);
            background: transparent;
            cursor: pointer;
            transition: color var(--transition);
        }

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

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(26, 60, 94, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .faq-item.active .faq-question .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 300ms ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* CTA */
        .cta-panel {
            background: linear-gradient(140deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .cta-panel h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            color: #fff;
        }

        .cta-panel p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .cta-panel .btn-accent {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
        }

        .cta-panel .btn-accent:hover {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 6px 22px rgba(0, 0, 0, 0.3);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            padding: 56px 0 28px;
            color: rgba(255, 255, 255, 0.85);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .brand {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand .brand:hover {
            color: #fff;
        }

        .footer-brand .brand-text strong {
            color: #fff;
        }

        .footer-brand .brand-text span {
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-brand .brand-mark {
            background: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.7);
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-bottom .domain-info {
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-padding: 64px;
            }

            .hero-category .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-category .hero-desc {
                max-width: 100%;
            }

            .hero-category .hero-visual {
                order: -1;
            }

            .cluster-node {
                min-height: 100px;
                padding: 18px 12px;
            }

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

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .checklist-block {
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 28px 24px;
            }

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

            .footer-grid .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 52px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--surface);
                border-bottom: 1px solid var(--border);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: var(--shadow-md);
                display: none;
            }

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

            .nav-links a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
                font-size: 15px;
            }

            .hero-category {
                padding: 48px 0 60px;
            }

            .hero-category h1 {
                font-size: clamp(28px, 6vw, 36px);
            }

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

            .hero-actions .btn {
                width: 100%;
            }

            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .cta-panel {
                padding: 40px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .brand-text strong {
                font-size: 13px;
            }

            .brand-text span {
                font-size: 10px;
            }

            .brand-mark {
                width: 36px;
                height: 36px;
                font-size: 12px;
            }

            .hero-category h1 {
                font-size: 26px;
            }

            .hero-category .hero-desc {
                font-size: 15px;
            }

            .cluster-diagram {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .cluster-node {
                min-height: 90px;
                padding: 14px 10px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .checklist-block {
                padding: 22px 18px;
            }

            .faq-question {
                font-size: 14px;
                padding: 16px 18px;
            }

            .faq-answer-inner {
                padding: 0 18px 16px;
                font-size: 13px;
            }
        }