/* roulang page: index */
:root {
            --primary: #0A192F;
            --secondary: #1B2A4A;
            --accent: #FF6B35;
            --accent-hover: #d95a2e;
            --accent-active: #c44c23;
            --bg-light: #F8F9FA;
            --text-body: #333333;
            --text-heading: #111111;
            --text-muted: #6c757d;
            --border-color: #e5e7eb;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
            --radius-xl: 12px;
            --radius-2xl: 16px;
            --radius-full: 9999px;
            --transition: all 0.3s ease-in-out;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
            color: var(--text-body);
            background: #ffffff;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            outline: none;
            border: none;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        @media (min-width: 640px) {
            .container-custom {
                padding: 0 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding: 0 2rem;
            }
        }

        /* Nav */
        .navbar {
            background: rgba(255, 255, 255, 0.98);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .navbar .nav-link {
            padding: 0.5rem 1rem;
            color: #4a5568;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            border-bottom: 2px solid transparent;
        }

        .navbar .nav-link:hover {
            color: var(--accent);
        }

        .navbar .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--accent);
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            padding: 0.6rem 1.8rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 2px solid var(--accent);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:active {
            background: var(--accent-active);
            transform: translateY(0);
        }

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

        .btn-outline {
            background: transparent;
            color: #fff;
            padding: 0.6rem 1.8rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 2px solid rgba(255, 255, 255, 0.8);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            transform: translateY(-1px);
        }

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

        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            padding: 0.6rem 1.8rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 2px solid var(--primary);
        }

        .btn-outline-dark:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }

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

        /* Card */
        .card-modern {
            background: #fff;
            border-radius: var(--radius-2xl);
            box-shadow: var(--shadow-md);
            padding: 1.5rem;
            transition: var(--transition);
        }

        .card-modern:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .badge {
            display: inline-block;
            background: #E8F0FE;
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 500;
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-full);
            letter-spacing: 0.01em;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 1.2rem 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-heading);
            transition: var(--transition);
            user-select: none;
        }

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

        .faq-question .icon {
            flex-shrink: 0;
            width: 1.5rem;
            height: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            color: var(--accent);
            font-size: 1.1rem;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 0.5rem 0 0;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 0.8rem;
        }

        /* Footer */
        .footer-link {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            font-size: 0.9rem;
        }

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

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 1.5rem;
            right: 1.5rem;
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.4s ease, visibility 0.4s ease, transform 0.3s ease;
            transform: translateY(20px);
        }

        .floating-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .floating-cta .btn-floating {
            background: var(--accent);
            color: #fff;
            padding: 0.8rem 1.6rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            border: none;
            cursor: pointer;
        }

        .floating-cta .btn-floating:hover {
            background: var(--accent-hover);
            box-shadow: 0 8px 28px rgba(255, 107, 53, 0.5);
            transform: scale(1.03);
        }

        /* Search input */
        .search-input {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-full);
            padding: 0.45rem 1rem 0.45rem 2.2rem;
            font-size: 0.85rem;
            background: #f9fafb;
            transition: var(--transition);
            width: 180px;
        }

        .search-input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
            background: #fff;
        }

        .search-wrapper {
            position: relative;
        }

        .search-wrapper .search-icon {
            position: absolute;
            left: 0.75rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.8rem;
            pointer-events: none;
        }

        /* Hero overlay */
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 25, 47, 0.88) 0%, rgba(10, 25, 47, 0.4) 50%, rgba(0,0,0,0.2) 100%);
            z-index: 1;
        }

        /* Stat number */
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 400;
            margin-top: 0.3rem;
        }

        /* Section spacing */
        .section-padding {
            padding: 4.5rem 0;
        }

        @media (min-width: 768px) {
            .section-padding {
                padding: 6rem 0;
            }
        }

        @media (min-width: 1024px) {
            .section-padding {
                padding: 7rem 0;
            }
        }

        /* Mobile nav */
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: #fff;
            border-bottom: 1px solid var(--border-color);
        }

        .mobile-menu.open {
            max-height: 400px;
            padding: 0.5rem 0;
        }

        .mobile-menu a {
            display: block;
            padding: 0.7rem 1.5rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            border-left: 3px solid transparent;
        }

        .mobile-menu a:hover {
            color: var(--accent);
            background: #f9fafb;
        }

        .mobile-menu a.active {
            color: var(--primary);
            border-left-color: var(--accent);
            background: #f0f4ff;
        }

        /* Touch targets */
        button, a, .btn-primary, .btn-outline, .btn-outline-dark, .faq-question {
            min-height: 44px;
            display: inline-flex;
            align-items: center;
        }

        /* Responsive text */
        @media (max-width: 640px) {
            .stat-number {
                font-size: 2.2rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
        }

        /* Card grid empty state */
        .empty-state {
            background: #f3f4f6;
            border-radius: var(--radius-2xl);
            padding: 2.5rem 1.5rem;
            text-align: center;
            color: var(--text-muted);
        }

        /* line-clamp */
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .line-clamp-3 {
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Image card in showcase */
        .img-card {
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        /* Accent divider */
        .accent-divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0.5rem 0 1rem 0;
        }

        /* Section title */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 0.5rem;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #0A192F;
            --secondary: #1B2A4A;
            --accent: #FF6B35;
            --accent-hover: #d95a2e;
            --accent-active: #c44c23;
            --bg-light: #F8F9FA;
            --text-body: #1A1A1A;
            --text-muted: #6c757d;
            --border-light: #e5e7eb;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'Noto Sans SC', sans-serif;
            color: var(--text-body);
            background: #ffffff;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        @media (min-width: 640px) {
            .container-custom {
                padding: 0 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding: 0 2rem;
            }
        }

        /* Navbar */
        .navbar {
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(8px);
        }
        .nav-link {
            padding: 0.5rem 1rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }
        .nav-link:hover {
            color: var(--accent);
            background: rgba(255, 107, 53, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            border-bottom: 2px solid var(--accent);
            background: transparent;
            font-weight: 600;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent);
            color: #fff;
            padding: 0.6rem 1.6rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            letter-spacing: 0.02em;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(255, 107, 53, 0.35);
            color: #fff;
        }
        .btn-primary:active {
            background: var(--accent-active);
            transform: translateY(0);
        }
        .btn-primary:focus {
            outline: none;
            ring: 2px solid var(--accent);
            ring-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 0.6rem 1.6rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            background: transparent;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.95rem;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(10, 25, 47, 0.2);
        }
        .search-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .search-input {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-full);
            padding: 0.5rem 1rem 0.5rem 2.4rem;
            font-size: 0.875rem;
            background: var(--bg-light);
            outline: none;
            transition: all 0.3s ease;
            width: 200px;
            color: var(--text-body);
        }
        .search-input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.12);
            background: #fff;
            width: 240px;
        }
        .search-input::placeholder {
            color: #aaa;
        }

        /* Mobile Menu */
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, opacity 0.3s ease;
            opacity: 0;
            background: #fff;
            border-top: 1px solid var(--border-light);
        }
        .mobile-menu.open {
            max-height: 400px;
            opacity: 1;
        }
        .mobile-menu a {
            display: block;
            padding: 0.85rem 1.5rem;
            font-weight: 500;
            color: var(--text-body);
            border-bottom: 1px solid #f3f4f6;
            transition: all 0.2s ease;
        }
        .mobile-menu a:hover {
            background: var(--bg-light);
            color: var(--accent);
        }
        .mobile-menu a.active {
            color: var(--accent);
            font-weight: 600;
            border-left: 3px solid var(--accent);
        }

        /* Section spacing */
        .section-padding {
            padding: 5rem 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 3rem 0;
            }
        }

        /* Cards */
        .card-base {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            transition: all 0.3s ease;
        }
        .card-base:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        /* Badge / Tag */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 500;
            background: #E8F0FE;
            color: var(--primary);
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.2rem 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-body);
            transition: color 0.3s ease;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question .fa-chevron-down {
            transition: transform 0.3s ease;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .faq-question.open .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            color: var(--text-muted);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.8rem;
        }

        /* Footer */
        .footer-link {
            color: #9ca3af;
            transition: color 0.3s ease;
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: var(--accent);
        }

        /* ===== Category page specific ===== */
        .hero-cat {
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(10, 25, 47, 0.88) 0%, rgba(27, 42, 74, 0.75) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }
        .hero-cat::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, rgba(10, 25, 47, 0.6) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-cat>* {
            position: relative;
            z-index: 2;
        }

        .feature-icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            background: rgba(255, 107, 53, 0.1);
            color: var(--accent);
            transition: all 0.3s ease;
        }
        .card-base:hover .feature-icon-wrap {
            background: var(--accent);
            color: #fff;
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .step-card {
            text-align: center;
            padding: 2rem 1.5rem;
            border-radius: var(--radius-md);
            background: #fff;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            border: 1px solid var(--border-light);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 1rem;
        }

        /* Section title */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.6rem;
        }
        .section-sub {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 2.5rem;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .hero-cat {
                min-height: 50vh;
            }
        }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            z-index: 40;
            background: #fff;
            border-radius: var(--radius-full);
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.15);
            padding: 0.6rem 1.2rem 0.6rem 1.6rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            border: 1px solid var(--border-light);
            transition: all 0.4s ease;
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
        }
        .floating-cta.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: all;
        }
        .floating-cta:hover {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.2);
            transform: translateY(-2px);
        }
        .floating-cta .btn-primary {
            padding: 0.4rem 1.2rem;
            font-size: 0.85rem;
        }
        @media (max-width: 640px) {
            .floating-cta {
                bottom: 1rem;
                right: 1rem;
                padding: 0.4rem 0.8rem 0.4rem 1.2rem;
            }
            .floating-cta .btn-primary {
                padding: 0.3rem 0.9rem;
                font-size: 0.8rem;
            }
            .floating-cta span {
                font-size: 0.8rem;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1rem;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.3s ease;
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .separator {
            color: rgba(255, 255, 255, 0.4);
        }
        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        /* Misc */
        .divider-accent {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0.5rem 0 1.5rem;
        }
        .text-accent {
            color: var(--accent);
        }
        .bg-accent-light {
            background: rgba(255, 107, 53, 0.08);
        }
        .line-clamp-3 {
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

/* roulang page: category1 */
:root {
            --primary: #0A192F;
            --primary-light: #1B2A4A;
            --accent: #FF6B35;
            --accent-hover: #d95a2e;
            --accent-active: #c44c23;
            --bg-light: #F8F9FA;
            --bg-white: #FFFFFF;
            --text-dark: #111111;
            --text-body: #333333;
            --text-muted: #6c757d;
            --text-gray: #9CA3AF;
            --border-light: #E5E7EB;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition: all 0.3s ease-in-out;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            color: var(--text-body);
            background: var(--bg-white);
            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, textarea {
            font-family: inherit;
            transition: var(--transition);
        }
        button:focus, input:focus, textarea:focus {
            outline: none;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 640px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* Navbar */
        .navbar {
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .nav-link {
            padding: 0.5rem 1rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .nav-link:hover {
            color: var(--accent);
            background: rgba(255,107,53,0.06);
        }
        .nav-link.active {
            color: var(--primary);
            border-bottom: 2px solid var(--accent);
            border-radius: 0;
            background: transparent;
        }
        .search-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .search-input {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-full);
            padding: 0.5rem 1rem 0.5rem 2.4rem;
            font-size: 0.9rem;
            background: var(--bg-light);
            color: var(--text-body);
            width: 200px;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(255,107,53,0.15);
            background: var(--bg-white);
            width: 240px;
        }
        .search-input::placeholder {
            color: var(--text-gray);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            padding: 0.6rem 1.6rem;
            border-radius: var(--radius-full);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            letter-spacing: 0.02em;
            font-size: 0.95rem;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 6px 20px rgba(255,107,53,0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            background: var(--accent-active);
            transform: translateY(0);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 2px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            padding: 0.6rem 1.6rem;
            border-radius: var(--radius-full);
            background: transparent;
            cursor: pointer;
            transition: var(--transition);
            letter-spacing: 0.02em;
            font-size: 0.95rem;
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-secondary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Mobile menu */
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
        }
        .mobile-menu.open {
            max-height: 400px;
        }
        .mobile-menu a {
            display: block;
            padding: 0.8rem 1.5rem;
            font-weight: 500;
            color: var(--text-body);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .mobile-menu a:hover {
            color: var(--accent);
            background: rgba(255,107,53,0.04);
        }
        .mobile-menu a.active {
            color: var(--primary);
            border-left: 3px solid var(--accent);
            background: rgba(10,25,47,0.03);
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(10,25,47,0.92) 0%, rgba(10,25,47,0.6) 60%, rgba(0,0,0,0.3) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding-top: 6rem;
            padding-bottom: 4rem;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-white) 0%, transparent 100%);
            pointer-events: none;
        }

        /* Feature cards */
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            border: 1px solid rgba(0,0,0,0.02);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin-bottom: 1.2rem;
        }

        /* Content block */
        .content-block {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 3rem;
        }
        .content-block.reverse {
            flex-direction: row-reverse;
        }
        .content-text {
            flex: 1 1 45%;
            min-width: 280px;
        }
        .content-image {
            flex: 1 1 45%;
            min-width: 280px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .content-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .content-image:hover img {
            transform: scale(1.03);
        }

        /* Stat block */
        .stat-item {
            text-align: center;
            padding: 1.5rem 1rem;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            letter-spacing: -0.02em;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 0.3rem;
            font-weight: 500;
        }

        /* Step / Process */
        .step-item {
            display: flex;
            gap: 1.2rem;
            align-items: flex-start;
            padding: 1.2rem 0;
        }
        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .step-content h4 {
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.2rem;
        }
        .step-content p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 0;
            cursor: pointer;
            font-weight: 500;
            color: var(--text-dark);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question .fa-chevron-down {
            transition: transform 0.3s ease;
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .faq-question.open .fa-chevron-down {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 0.5rem;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 0.5rem 1.2rem 0.5rem;
        }
        .faq-answer p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* Footer */
        .footer-link {
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-block;
            padding: 0.15rem 0;
        }
        .footer-link:hover {
            color: var(--accent);
            transform: translateX(3px);
        }

        /* CTA floating */
        .floating-cta {
            position: fixed;
            bottom: 1.5rem;
            right: 1.5rem;
            z-index: 40;
            background: var(--bg-white);
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-lg);
            padding: 0.75rem 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
        }
        .floating-cta.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .floating-cta:hover {
            box-shadow: 0 12px 32px rgba(0,0,0,0.18);
            transform: translateY(-3px);
        }
        .floating-cta .btn-primary {
            padding: 0.45rem 1.2rem;
            font-size: 0.9rem;
        }

        /* Responsive breakpoints */
        @media (max-width: 768px) {
            .hero-section {
                min-height: 70vh;
                padding-top: 5rem;
                padding-bottom: 3rem;
            }
            .hero-section h1 {
                font-size: 2.2rem !important;
            }
            .hero-section p.subtitle {
                font-size: 1.05rem !important;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .content-block {
                flex-direction: column !important;
                gap: 1.5rem;
            }
            .content-text, .content-image {
                flex: 1 1 100%;
                min-width: 0;
            }
            .feature-card {
                padding: 1.5rem 1.2rem;
            }
            .floating-cta {
                bottom: 1rem;
                right: 1rem;
                padding: 0.5rem 1rem;
            }
            .floating-cta .btn-primary {
                padding: 0.35rem 1rem;
                font-size: 0.8rem;
            }
            .container-custom {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }
        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.8rem !important;
            }
            .hero-section p.subtitle {
                font-size: 0.95rem !important;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .feature-card {
                padding: 1.2rem 1rem;
            }
            .btn-primary, .btn-secondary {
                font-size: 0.85rem;
                padding: 0.5rem 1.2rem;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .hero-section {
                min-height: 75vh;
            }
            .hero-section h1 {
                font-size: 2.8rem !important;
            }
            .search-input {
                width: 150px;
            }
            .search-input:focus {
                width: 180px;
            }
        }
        /* Accessibility focus */
        a:focus-visible, button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        /* Utility */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
        }
        .badge-tag {
            display: inline-block;
            background: rgba(10,25,47,0.08);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 0.2rem 0.9rem;
            border-radius: var(--radius-full);
            letter-spacing: 0.02em;
        }
        .bg-soft-primary {
            background: rgba(10,25,47,0.03);
        }
        .text-accent {
            color: var(--accent);
        }
        .text-primary {
            color: var(--primary);
        }
        .bg-accent {
            background: var(--accent);
        }
        .bg-primary {
            background: var(--primary);
        }
        .border-accent {
            border-color: var(--accent);
        }
        .hover-lift {
            transition: var(--transition);
        }
        .hover-lift:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .line-clamp-3 {
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }