/* roulang page: index */
:root {
            --color-primary: #4f46e5;
            --color-primary-light: #818cf8;
            --color-primary-dark: #3730a3;
            --color-accent: #7c3aed;
            --color-accent-light: #a855f7;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-dark: #0f172a;
            --color-text: #1e293b;
            --color-text-soft: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 20px 60px rgba(79, 70, 229, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.6;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding: 0 2.5rem;
            }
        }

        /* === Navigation === */
        .nav-glass {
            position: fixed;
            top: 1rem;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 2rem);
            max-width: 1200px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-radius: var(--radius-xl);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.5);
            z-index: 1000;
            padding: 0.6rem 1.5rem;
            transition: all 0.4s ease;
        }

        .nav-glass.scrolled {
            top: 0.5rem;
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.1);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 56px;
        }

        .nav-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            white-space: nowrap;
        }

        .nav-logo i {
            color: var(--color-primary);
            font-size: 1.5rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-links a {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-lg);
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--color-text-soft);
            transition: all var(--transition);
            position: relative;
        }

        .nav-links a:hover {
            color: var(--color-primary);
            background: rgba(79, 70, 229, 0.06);
        }

        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(79, 70, 229, 0.1);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            color: var(--color-text);
            font-size: 1.25rem;
            background: rgba(0, 0, 0, 0.04);
        }

        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.08);
        }

        @media (max-width: 768px) {
            .nav-glass {
                top: 0.75rem;
                width: calc(100% - 1.2rem);
                padding: 0.4rem 1rem;
                border-radius: var(--radius-lg);
            }

            .nav-inner {
                height: 48px;
            }

            .nav-logo {
                font-size: 1.05rem;
            }

            .nav-logo span {
                display: none;
            }

            .nav-links {
                position: fixed;
                top: 4.5rem;
                left: 0.6rem;
                right: 0.6rem;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                border-radius: var(--radius-lg);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
                padding: 0.75rem;
                flex-direction: column;
                gap: 0.25rem;
                display: none;
                border: 1px solid rgba(0, 0, 0, 0.06);
            }

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

            .nav-links a {
                width: 100%;
                padding: 0.75rem 1rem;
                border-radius: var(--radius-md);
                font-size: 1rem;
            }

            .nav-toggle {
                display: flex;
            }
        }

        @media (min-width: 769px) {
            .nav-links {
                display: flex !important;
            }
        }

        /* === Hero === */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
            overflow: hidden;
            padding: 8rem 1.5rem 4rem;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(79, 70, 229, 0.15) 0%, transparent 70%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            border-radius: 100px;
            background: rgba(129, 140, 248, 0.15);
            border: 1px solid rgba(129, 140, 248, 0.25);
            color: #a5b4fc;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(8px);
        }

        .hero-title {
            font-size: clamp(2.2rem, 5vw, 4rem);
            font-weight: 800;
            line-height: 1.15;
            color: #ffffff;
            letter-spacing: -0.03em;
            margin-bottom: 1.5rem;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, #818cf8, #a855f7);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: clamp(1rem, 1.8vw, 1.2rem);
            color: rgba(255, 255, 255, 0.7);
            max-width: 680px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: #fff;
            box-shadow: 0 8px 30px rgba(79, 70, 229, 0.35);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(79, 70, 229, 0.45);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2.5rem 4rem;
            margin-top: 3.5rem;
            padding-top: 2.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-stat-item {
            text-align: center;
        }

        .hero-stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stat-item .num .plus {
            color: #a5b4fc;
        }

        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 0.25rem;
        }

        @media (max-width: 640px) {
            .hero-section {
                padding: 6rem 1rem 3rem;
                min-height: 90vh;
            }
            .hero-stats {
                gap: 1.5rem 2rem;
            }
            .hero-stat-item .num {
                font-size: 1.5rem;
            }
        }

        /* === Section === */
        .section-padding {
            padding: 5rem 1.5rem;
        }

        @media (min-width: 768px) {
            .section-padding {
                padding: 6rem 2rem;
            }
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--color-text);
            margin-bottom: 0.75rem;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-soft);
            max-width: 640px;
            line-height: 1.7;
        }

        /* === Card === */
        .card-base {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border);
            transition: all 0.4s ease;
            overflow: hidden;
        }

        .card-base:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.15);
        }

        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }

        .card-body {
            padding: 1.5rem;
        }

        .card-tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(79, 70, 229, 0.08);
            color: var(--color-primary);
            margin-bottom: 0.6rem;
        }

        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 0.5rem;
            color: var(--color-text);
        }

        .card-text {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        .card-footer {
            padding: 0 1.5rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--color-text-light);
        }

        /* === Features Grid === */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 2rem 1.75rem;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border);
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: opacity 0.4s ease;
        }

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

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.15);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
            background: rgba(79, 70, 229, 0.08);
            color: var(--color-primary);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }

        /* === Steps === */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            counter-increment: step;
            position: relative;
        }

        .step-item::after {
            content: '';
            position: absolute;
            top: 2rem;
            left: 60%;
            width: 60%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary-light), transparent);
            display: none;
        }

        .step-item:not(:last-child)::after {
            display: block;
        }

        @media (max-width: 900px) {
            .step-item::after {
                display: none !important;
            }
        }

        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-size: 1.5rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            box-shadow: 0 8px 30px rgba(79, 70, 229, 0.25);
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            max-width: 260px;
            margin: 0 auto;
        }

        /* === FAQ === */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.15);
        }

        .faq-question {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            gap: 1rem;
        }

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
            color: var(--color-text-soft);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* === CTA === */
        .cta-section {
            background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #1e1b4b 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 4rem 1.5rem;
        }

        .cta-content h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            background: #fff;
            color: var(--color-primary-dark);
            transition: all 0.3s ease;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(255, 255, 255, 0.2);
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all 0.3s ease;
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-2px);
        }

        /* === Footer === */
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 3rem 1.5rem 1.5rem;
        }

        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-col a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.3s ease;
        }

        .footer-col a:hover {
            color: #a5b4fc;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 1.5rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            gap: 1rem;
        }

        .footer-social {
            display: flex;
            gap: 0.75rem;
        }

        .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: rgba(255, 255, 255, 0.5);
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

        .footer-social a:hover {
            background: rgba(79, 70, 229, 0.2);
            color: #a5b4fc;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* === News List === */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1.5rem;
            color: var(--color-text-soft);
            font-size: 1rem;
            background: var(--color-bg-alt);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }

        /* === Badge / Tag === */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.2rem 0.75rem;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(79, 70, 229, 0.08);
            color: var(--color-primary);
        }

        .badge-accent {
            background: rgba(124, 58, 237, 0.08);
            color: var(--color-accent);
        }

        /* === Misc === */
        .bg-alt {
            background: var(--color-bg-alt);
        }

        .text-gradient {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .divider {
            width: 60px;
            height: 3px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            margin: 1rem 0 1.5rem;
        }

        .divider-center {
            margin-left: auto;
            margin-right: auto;
        }

        /* focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }

        ::-webkit-scrollbar-thumb {
            background: #c7d2fe;
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #a5b4fc;
        }

        /* Glass card variant */
        .glass-card {
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--radius-lg);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
        }

        .hover-lift {
            transition: all 0.4s ease;
        }

        .hover-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 60px rgba(79, 70, 229, 0.12);
        }

/* roulang page: article */
:root {
            --brand-50: #f0f7ff;
            --brand-100: #e0effe;
            --brand-200: #bae0fd;
            --brand-300: #7cc8fb;
            --brand-400: #36a9f5;
            --brand-500: #0c8ee7;
            --brand-600: #0072d0;
            --brand-700: #015ba9;
            --brand-800: #064d8b;
            --brand-900: #0b4173;
            --brand-950: #072849;
            --accent-400: #f97316;
            --accent-500: #ea580c;
            --accent-600: #d24b00;
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-300: #d1d5db;
            --gray-400: #9ca3af;
            --gray-500: #6b7280;
            --gray-600: #4b5563;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --gray-900: #111827;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: var(--gray-50);
            color: var(--gray-800);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button, input, textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        /* ===== Nav Glass ===== */
        .nav-glass {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
        }
        .nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand-700);
            letter-spacing: -0.01em;
        }
        .nav-logo i {
            font-size: 1.6rem;
            color: var(--brand-500);
            background: linear-gradient(135deg, var(--brand-400), var(--brand-600));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-logo span {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 0.25rem;
            align-items: center;
        }
        .nav-links a {
            display: block;
            padding: 0.55rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--gray-600);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--brand-600);
            background: rgba(12, 142, 231, 0.08);
        }
        .nav-links a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            box-shadow: 0 4px 14px rgba(12, 142, 231, 0.30);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--gray-700);
            cursor: pointer;
            padding: 0.25rem;
            border-radius: 0.5rem;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: var(--brand-500);
        }
        /* ===== Hero Inner ===== */
        .hero-inner {
            position: relative;
            padding: 5rem 0 4rem;
            background: linear-gradient(165deg, #f0f7ff 0%, #e8f4fe 50%, #fefce8 100%);
            overflow: hidden;
        }
        .hero-inner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center 30% / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .hero-inner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-inner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--gray-900);
            letter-spacing: -0.02em;
            max-width: 800px;
            margin: 0 auto 1rem;
        }
        .hero-inner .meta {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            color: var(--gray-500);
            font-size: 0.95rem;
            margin-top: 1.2rem;
        }
        .hero-inner .meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .hero-inner .meta i {
            color: var(--brand-400);
        }
        /* ===== Article Content ===== */
        .article-section {
            padding: 4rem 0 5rem;
        }
        .article-body {
            max-width: 800px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            padding: 3rem 3.5rem;
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--gray-700);
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--gray-900);
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            line-height: 1.3;
        }
        .article-body h2 {
            font-size: 1.6rem;
            border-left: 4px solid var(--brand-400);
            padding-left: 1rem;
        }
        .article-body h3 {
            font-size: 1.3rem;
        }
        .article-body p {
            margin-bottom: 1.2rem;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 1.5rem 1.5rem;
        }
        .article-body li {
            margin-bottom: 0.4rem;
        }
        .article-body a {
            color: var(--brand-600);
            border-bottom: 1px solid rgba(12, 142, 231, 0.25);
        }
        .article-body a:hover {
            color: var(--brand-800);
            border-bottom-color: var(--brand-600);
        }
        .article-body blockquote {
            border-left: 4px solid var(--brand-300);
            background: var(--brand-50);
            padding: 1.2rem 1.8rem;
            margin: 1.8rem 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--gray-600);
            font-style: italic;
        }
        .article-body img {
            margin: 2rem auto;
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .article-body code {
            background: var(--gray-100);
            padding: 0.2rem 0.5rem;
            border-radius: 0.4rem;
            font-size: 0.9em;
            color: var(--brand-700);
        }
        .article-body pre {
            background: var(--gray-900);
            color: #e5e7eb;
            padding: 1.5rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }
        .not-found-box {
            text-align: center;
            padding: 5rem 2rem;
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            max-width: 600px;
            margin: 2rem auto;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--gray-300);
            margin-bottom: 1.5rem;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--gray-700);
            margin-bottom: 1rem;
        }
        .not-found-box p {
            color: var(--gray-500);
            margin-bottom: 2rem;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            background: var(--brand-500);
            color: #fff;
            border-radius: 2rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-back:hover {
            background: var(--brand-700);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(12, 142, 231, 0.30);
        }
        /* ===== Related / CTA ===== */
        .related-section {
            padding: 3rem 0 5rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
            margin-top: 2.5rem;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 1.5rem;
        }
        .related-card .card-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--gray-500);
            line-height: 1.6;
        }
        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-800));
            padding: 4rem 0;
            text-align: center;
            color: #fff;
            border-radius: var(--radius-xl);
            margin: 0 1.5rem;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .cta-block p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.8rem;
            background: #fff;
            color: var(--brand-700);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 2rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .cta-btn:hover {
            background: var(--gray-100);
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(0, 0, 0, 0.20);
        }
        /* ===== Footer ===== */
        .footer {
            background: var(--gray-900);
            color: rgba(255, 255, 255, 0.75);
            padding: 4rem 0 0;
            margin-top: 5rem;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 3rem;
            padding-bottom: 3rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-brand h3 i {
            color: var(--brand-400);
        }
        .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .footer-col ul a:hover {
            color: var(--brand-300);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            padding: 1.8rem 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-social {
            display: flex;
            gap: 1rem;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--brand-500);
            color: #fff;
            transform: scale(1.08);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-inner h1 {
                font-size: 2.2rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: span 2;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1rem 1.5rem;
                border-bottom: 1px solid var(--gray-200);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
                gap: 0.25rem;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 0.7rem 1rem;
                width: 100%;
            }
            .nav-toggle {
                display: block;
            }
            .hero-inner {
                padding: 3.5rem 0 2.5rem;
            }
            .hero-inner h1 {
                font-size: 1.8rem;
            }
            .hero-inner .meta {
                font-size: 0.85rem;
                gap: 0.8rem;
            }
            .article-body {
                padding: 2rem 1.5rem;
                font-size: 1rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-block {
                margin: 0 1rem;
                padding: 3rem 1.5rem;
                border-radius: var(--radius-lg);
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .nav-inner {
                height: 60px;
                padding: 0 1rem;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo i {
                font-size: 1.3rem;
            }
            .hero-inner h1 {
                font-size: 1.5rem;
            }
            .article-body {
                padding: 1.5rem 1rem;
            }
            .article-body h2 {
                font-size: 1.3rem;
                padding-left: 0.75rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --primary-dark: #3730a3;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-light: #f8fafc;
            --bg-dark: #0f172a;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --text-light: #f1f5f9;
            --border-light: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .nav-glass {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            transition: var(--transition);
        }
        .nav-glass.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
        }
        .nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
            transition: var(--transition);
        }
        .nav-logo i {
            font-size: 1.6rem;
            color: var(--primary-light);
        }
        .nav-logo:hover {
            opacity: 0.85;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 0.4rem 0.2rem;
            position: relative;
            transition: var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary-dark);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 0.3rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(79, 70, 229, 0.08);
        }
        .hero-cat {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #eef2ff 0%, #e0e7ff 50%, #c7d2fe 100%);
            position: relative;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero-cat::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero-cat .container {
            position: relative;
            z-index: 2;
        }
        .hero-cat-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(79, 70, 229, 0.12);
            color: var(--primary);
            padding: 0.4rem 1.2rem;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(79, 70, 229, 0.15);
        }
        .hero-cat h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-dark);
            max-width: 760px;
            letter-spacing: -0.03em;
        }
        .hero-cat h1 span {
            color: var(--primary);
        }
        .hero-cat p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-top: 1.2rem;
            line-height: 1.8;
        }
        .hero-cat-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2rem;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            text-align: center;
            margin-bottom: 0.6rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 3rem;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 2.2rem 1.8rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.2rem;
            font-size: 1.8rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--text-dark);
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .method-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-align: center;
        }
        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent-light);
        }
        .method-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.5rem;
            color: #fff;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
        }
        .method-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }
        .method-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 1.2rem 1.8rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 1rem;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--text-muted);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.8rem;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.8rem 1.4rem;
        }
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 4rem 0;
            text-align: center;
            border-radius: var(--radius-xl);
            margin: 0 1.5rem;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 2rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.8rem 2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
            background: #f8fafc;
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-primary-dark {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-primary-dark:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        .footer {
            background: var(--bg-dark);
            color: var(--text-light);
            padding: 4rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .footer-col ul li a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .footer-col ul li span {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 2rem;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-bottom span {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.1rem;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-social a:hover {
            background: rgba(79, 70, 229, 0.3);
            color: #fff;
            border-color: rgba(79, 70, 229, 0.4);
            transform: translateY(-3px);
        }
        .section-padding {
            padding: 4.5rem 0;
        }
        .bg-soft {
            background: #f1f5f9;
        }
        .text-brand-400 {
            color: var(--primary-light);
        }
        .text-gray-500 {
            color: var(--text-muted);
        }
        .mr-2 {
            margin-right: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 0.5rem;
        }
        @media (max-width: 1024px) {
            .hero-cat h1 {
                font-size: 2.6rem;
            }
            .features-grid,
            .methods-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.5rem 2rem;
                gap: 1.2rem;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border-light);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-links a {
                font-size: 1.1rem;
                padding: 0.5rem 0;
            }
            .nav-toggle {
                display: block;
            }
            .hero-cat {
                padding: 120px 0 60px;
                min-height: auto;
            }
            .hero-cat h1 {
                font-size: 2rem;
            }
            .hero-cat p {
                font-size: 1rem;
            }
            .features-grid,
            .methods-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
            .cta-section {
                margin: 0 1rem;
                padding: 3rem 0;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-social {
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .hero-cat h1 {
                font-size: 1.6rem;
            }
            .hero-cat-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-cat-actions .btn {
                justify-content: center;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 1rem 1.2rem;
            }
            .faq-answer {
                font-size: 0.9rem;
                padding: 0 1.2rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 1.2rem 1rem;
            }
            .feature-card,
            .method-card {
                padding: 1.5rem 1.2rem;
            }
        }