/* roulang page: index */
:root {
            --ng-primary: #3A7BD5;
            --ng-primary-dark: #2F6BFF;
            --ng-primary-soft: #EAF1FC;
            --ng-accent: #F5A623;
            --ng-accent-dark: #E8940F;
            --ng-bg: #F7F9FC;
            --ng-bg-soft: #FAFBFE;
            --ng-white: #FFFFFF;
            --ng-dark: #1F2937;
            --ng-dark-2: #2D3748;
            --ng-gray: #6B7280;
            --ng-gray-light: #9CA3AF;
            --ng-border: #E5E7EB;
            --ng-radius: 14px;
            --ng-radius-sm: 10px;
            --ng-radius-lg: 18px;
            --ng-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            --ng-shadow-hover: 0 8px 24px rgba(58, 123, 213, 0.14);
            --ng-shadow-lg: 0 16px 40px rgba(31, 41, 55, 0.10);
            --ng-spacing: 80px;
            --ng-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
            --ng-transition: all 0.28s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--ng-font);
            font-size: 16px;
            line-height: 1.85;
            color: var(--ng-dark);
            background-color: var(--ng-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--ng-primary);
            text-decoration: none;
            transition: var(--ng-transition);
        }
        a:hover {
            color: var(--ng-primary-dark);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
        }

        ::selection {
            background: var(--ng-primary);
            color: #fff;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header & Nav */
        .ng-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: var(--ng-transition);
        }
        .ng-header .navbar {
            max-width: 1200px;
            margin: 0 auto;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(229, 231, 235, 0.6);
            box-shadow: 0 6px 22px rgba(31, 41, 55, 0.08);
            padding: 6px 18px;
            transition: var(--ng-transition);
        }
        .ng-header.scrolled .navbar {
            box-shadow: 0 10px 32px rgba(31, 41, 55, 0.14);
            background: rgba(255, 255, 255, 0.95);
        }
        .navbar-brand.ng-logo {
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.6px;
            color: var(--ng-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand.ng-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 800;
        }
        .navbar-brand.ng-logo .logo-text {
            color: var(--ng-dark);
        }
        .navbar-brand.ng-logo:hover {
            color: var(--ng-dark);
        }
        .navbar-brand.ng-logo .brand-highlight {
            color: var(--ng-primary);
        }

        .ng-navbar .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ng-dark-2);
            padding: 8px 16px;
            border-radius: 30px;
            margin: 0 2px;
            transition: var(--ng-transition);
            position: relative;
        }
        .ng-navbar .navbar-nav .nav-link:hover {
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
        }
        .ng-navbar .navbar-nav .nav-link.active {
            color: #fff;
            background: var(--ng-primary);
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.3);
        }
        .ng-navbar .navbar-toggler {
            border: none;
            box-shadow: none;
            font-size: 22px;
            color: var(--ng-dark);
            padding: 6px 10px;
            border-radius: 10px;
        }
        .ng-navbar .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
        }
        .ng-navbar .navbar-toggler:hover {
            background: var(--ng-primary-soft);
        }
        .ng-nav-cta {
            white-space: nowrap;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            background: var(--ng-accent);
            color: #fff;
            border: none;
            transition: var(--ng-transition);
        }
        .ng-nav-cta:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 166, 35, 0.35);
        }

        /* Hero */
        .ng-hero {
            padding-top: 140px;
            padding-bottom: 60px;
            background: linear-gradient(180deg, #FFFFFF 0%, var(--ng-bg-soft) 60%, var(--ng-bg) 100%);
            position: relative;
            overflow: hidden;
        }
        .ng-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(58, 123, 213, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ng-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(245, 166, 35, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ng-hero .container {
            position: relative;
            z-index: 2;
        }
        .ng-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 30px;
            margin-bottom: 18px;
            border: 1px solid rgba(58, 123, 213, 0.15);
        }
        .ng-hero h1 {
            font-size: clamp(28px, 4.2vw, 40px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--ng-dark);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .ng-hero h1 .h1-highlight {
            color: var(--ng-primary);
            position: relative;
            white-space: nowrap;
        }
        .ng-hero h1 .h1-highlight::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 2px;
            width: 100%;
            height: 5px;
            background: rgba(245, 166, 35, 0.4);
            border-radius: 4px;
            z-index: -1;
        }
        .ng-hero-sub {
            font-size: 16px;
            color: var(--ng-gray);
            max-width: 560px;
            margin-bottom: 24px;
            line-height: 1.85;
        }
        .ng-hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }
        .ng-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 12px;
            border: none;
            transition: var(--ng-transition);
            cursor: pointer;
            text-align: center;
            justify-content: center;
        }
        .ng-btn-primary {
            background: var(--ng-accent);
            color: #fff;
            box-shadow: 0 6px 16px rgba(245, 166, 35, 0.3);
        }
        .ng-btn-primary:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 22px rgba(245, 166, 35, 0.4);
        }
        .ng-btn-outline {
            background: transparent;
            color: var(--ng-primary);
            border: 2px solid var(--ng-primary);
        }
        .ng-btn-outline:hover {
            background: var(--ng-primary-soft);
            color: var(--ng-primary-dark);
            transform: translateY(-2px);
        }
        .ng-btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 10px;
        }
        .ng-btn-white {
            background: #fff;
            color: var(--ng-dark);
            border: 1px solid var(--ng-border);
        }
        .ng-btn-white:hover {
            border-color: var(--ng-primary);
            color: var(--ng-primary);
            transform: translateY(-2px);
        }
        .ng-code-block {
            background: #1A1F2E;
            border-radius: 14px;
            padding: 18px 20px;
            font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
            font-size: 13px;
            color: #CFD8E6;
            box-shadow: var(--ng-shadow-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            position: relative;
            overflow: hidden;
        }
        .ng-code-block .code-header {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 12px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .ng-code-block .code-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }
        .ng-code-block .code-dot.red {
            background: #FF5F56;
        }
        .ng-code-block .code-dot.yellow {
            background: #FFBD2E;
        }
        .ng-code-block .code-dot.green {
            background: #27C93F;
        }
        .ng-code-block .code-title {
            margin-left: 8px;
            color: #8B9BB4;
            font-size: 12px;
        }
        .ng-code-block pre {
            margin: 0;
            color: #D5DEEF;
            white-space: pre-wrap;
            word-break: break-word;
        }
        .ng-code-block code {
            color: #D5DEEF;
            font-family: inherit;
        }
        .ng-code-keyword {
            color: #7AA5FF;
        }
        .ng-code-string {
            color: #A8D672;
        }
        .ng-code-comment {
            color: #6B7A90;
        }
        .ng-code-var {
            color: #F5A623;
        }
        .ng-code-func {
            color: #B39DDB;
        }

        .ng-hero-visual {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .ng-hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
        }
        .ng-hero-stat-card {
            background: #fff;
            border-radius: 12px;
            padding: 14px 16px;
            text-align: center;
            box-shadow: var(--ng-shadow);
            border: 1px solid var(--ng-border);
        }
        .ng-hero-stat-card .stat-value {
            font-size: 22px;
            font-weight: 800;
            color: var(--ng-primary);
        }
        .ng-hero-stat-card .stat-label {
            font-size: 12px;
            color: var(--ng-gray);
            margin-top: 2px;
        }

        /* Sections */
        .ng-section {
            padding: var(--ng-spacing) 0;
            position: relative;
        }
        .ng-section-alt {
            background: var(--ng-white);
        }
        .ng-section-header {
            margin-bottom: 40px;
        }
        .ng-section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }
        .ng-section-title {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 800;
            color: var(--ng-dark);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .ng-section-desc {
            font-size: 16px;
            color: var(--ng-gray);
            max-width: 720px;
            line-height: 1.85;
        }
        .ng-card {
            background: #fff;
            border-radius: var(--ng-radius);
            padding: 26px 24px;
            box-shadow: var(--ng-shadow);
            border: 1px solid var(--ng-border);
            transition: var(--ng-transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .ng-card:hover {
            box-shadow: var(--ng-shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(58, 123, 213, 0.25);
        }
        .ng-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
        }
        .ng-card .card-icon.accent {
            background: #FFF6E8;
            color: var(--ng-accent);
        }
        .ng-card .card-icon.dark {
            background: #EEF2F7;
            color: var(--ng-dark-2);
        }
        .ng-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--ng-dark);
        }
        .ng-card p {
            font-size: 14px;
            color: var(--ng-gray);
            margin-bottom: 0;
            line-height: 1.75;
        }
        .ng-card-img {
            border-radius: 12px;
            overflow: hidden;
            margin-bottom: 16px;
            aspect-ratio: 16/9;
            background: #EEF2F7;
        }
        .ng-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--ng-transition);
        }
        .ng-card:hover .ng-card-img img {
            transform: scale(1.03);
        }
        .ng-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            margin-bottom: 8px;
        }
        .ng-tag.orange {
            background: #FFF6E8;
            color: var(--ng-accent-dark);
        }
        .ng-tag.green {
            background: #E8F8EF;
            color: #27AE60;
        }
        .ng-tag.red {
            background: #FDECEC;
            color: #E74C3C;
        }

        /* Trust data bar */
        .ng-trust-bar {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            padding: 32px 28px;
            box-shadow: var(--ng-shadow);
            border: 1px solid var(--ng-border);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 20px;
            text-align: center;
            margin-top: -40px;
            position: relative;
            z-index: 3;
        }
        .ng-trust-item .trust-value {
            font-size: 30px;
            font-weight: 800;
            color: var(--ng-dark);
            letter-spacing: -0.5px;
        }
        .ng-trust-item .trust-value span {
            color: var(--ng-primary);
        }
        .ng-trust-item .trust-label {
            font-size: 13px;
            color: var(--ng-gray);
            margin-top: 4px;
        }

        /* Table */
        .ng-table-wrap {
            overflow-x: auto;
            border-radius: var(--ng-radius);
            box-shadow: var(--ng-shadow);
            background: #fff;
            border: 1px solid var(--ng-border);
        }
        .ng-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            margin: 0;
        }
        .ng-table thead {
            background: var(--ng-primary-soft);
        }
        .ng-table thead th {
            font-weight: 700;
            color: var(--ng-dark);
            padding: 16px 18px;
            text-align: left;
            border-bottom: 2px solid rgba(58, 123, 213, 0.2);
            white-space: nowrap;
        }
        .ng-table tbody td {
            padding: 16px 18px;
            border-bottom: 1px solid var(--ng-border);
            color: var(--ng-dark-2);
            vertical-align: middle;
        }
        .ng-table tbody tr:last-child td {
            border-bottom: none;
        }
        .ng-table tbody tr:hover {
            background: var(--ng-bg-soft);
        }
        .ng-table .highlight-col {
            color: var(--ng-primary);
            font-weight: 700;
        }

        /* FAQ */
        .ng-faq-item {
            background: #fff;
            border-radius: var(--ng-radius);
            border: 1px solid var(--ng-border);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--ng-shadow);
            transition: var(--ng-transition);
        }
        .ng-faq-item:hover {
            box-shadow: var(--ng-shadow-hover);
        }
        .ng-faq-item .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--ng-dark);
            padding: 18px 22px;
            background: #fff;
            box-shadow: none;
            border: none;
            transition: var(--ng-transition);
        }
        .ng-faq-item .accordion-button:not(.collapsed) {
            color: var(--ng-primary);
            background: var(--ng-bg-soft);
            box-shadow: none;
        }
        .ng-faq-item .accordion-button:focus {
            box-shadow: none;
            border-color: var(--ng-primary);
        }
        .ng-faq-item .accordion-button::after {
            flex-shrink: 0;
        }
        .ng-faq-item .accordion-body {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.8;
            padding: 6px 22px 20px;
        }

        /* Fixed CTA bar */
        .ng-fixed-cta {
            position: fixed;
            bottom: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1060;
            width: min(540px, calc(100vw - 28px));
            background: #fff;
            border-radius: 50px;
            box-shadow: 0 12px 40px rgba(31, 41, 55, 0.18);
            border: 1px solid var(--ng-border);
            padding: 10px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--ng-transition);
        }
        .ng-fixed-cta .cta-text {
            font-size: 13px;
            font-weight: 600;
            color: var(--ng-dark-2);
            line-height: 1.3;
        }
        .ng-fixed-cta .cta-text small {
            display: block;
            font-weight: 400;
            color: var(--ng-gray);
            font-size: 11px;
        }
        .ng-fixed-cta .ng-btn {
            padding: 10px 22px;
            font-size: 13px;
            white-space: nowrap;
        }

        /* Footer */
        .ng-footer {
            background: var(--ng-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 100px;
            margin-top: 40px;
        }
        .ng-footer .footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .ng-footer .footer-brand span {
            color: var(--ng-accent);
        }
        .ng-footer .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            max-width: 400px;
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .ng-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ng-footer .footer-links li {
            margin-bottom: 8px;
        }
        .ng-footer .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: var(--ng-transition);
        }
        .ng-footer .footer-links a:hover {
            color: var(--ng-accent);
        }
        .ng-footer .footer-title {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .ng-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin-top: 36px;
            padding-top: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
        }
        .ng-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .ng-footer .footer-bottom a:hover {
            color: var(--ng-accent);
        }
        .ng-footer .social-links {
            display: flex;
            gap: 10px;
            margin-top: 14px;
        }
        .ng-footer .social-links a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--ng-transition);
            font-size: 15px;
        }
        .ng-footer .social-links a:hover {
            background: var(--ng-accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* List & badges */
        .ng-check-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ng-check-list li {
            padding-left: 26px;
            position: relative;
            margin-bottom: 8px;
            font-size: 14px;
            color: var(--ng-dark-2);
        }
        .ng-check-list li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--ng-primary);
            font-size: 13px;
        }
        .ng-check-list li.times::before {
            content: '\f00d';
            color: #E74C3C;
        }

        /* Marquee / scroll row */
        .ng-scroll-row {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding-bottom: 12px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .ng-scroll-row::-webkit-scrollbar {
            height: 4px;
        }
        .ng-scroll-row::-webkit-scrollbar-track {
            background: transparent;
        }
        .ng-scroll-row::-webkit-scrollbar-thumb {
            background: var(--ng-border);
            border-radius: 10px;
        }
        .ng-scroll-row .scroll-card {
            min-width: 280px;
            scroll-snap-align: start;
        }

        /* Divider */
        .ng-divider {
            border-top: 1px solid var(--ng-border);
            margin: 0;
        }

        /* Review cards */
        .ng-review-card {
            background: #fff;
            border-radius: var(--ng-radius);
            padding: 22px;
            box-shadow: var(--ng-shadow);
            border: 1px solid var(--ng-border);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .ng-review-card .review-stars {
            color: var(--ng-accent);
            font-size: 13px;
            margin-bottom: 8px;
            letter-spacing: 2px;
        }
        .ng-review-card .review-text {
            font-size: 14px;
            color: var(--ng-dark-2);
            line-height: 1.8;
            flex: 1;
            margin-bottom: 14px;
        }
        .ng-review-card .review-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ng-review-card .review-author .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--ng-primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ng-primary);
            font-weight: 700;
            font-size: 14px;
        }
        .ng-review-card .review-author .name {
            font-size: 13px;
            font-weight: 600;
            color: var(--ng-dark);
        }
        .ng-review-card .review-author .role {
            font-size: 11px;
            color: var(--ng-gray-light);
        }

        /* Info card */
        .ng-info-card {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: #fff;
            border-radius: var(--ng-radius);
            padding: 16px 18px;
            border: 1px solid var(--ng-border);
            box-shadow: var(--ng-shadow);
            transition: var(--ng-transition);
            height: 100%;
        }
        .ng-info-card:hover {
            box-shadow: var(--ng-shadow-hover);
        }
        .ng-info-card .info-icon {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--ng-primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ng-primary);
            font-size: 17px;
        }
        .ng-info-card .info-content h4 {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--ng-dark);
        }
        .ng-info-card .info-content p {
            font-size: 13px;
            color: var(--ng-gray);
            margin: 0;
            line-height: 1.7;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .ng-hero {
                padding-top: 120px;
                padding-bottom: 50px;
            }
            .ng-section {
                padding: 60px 0;
            }
            .ng-trust-bar {
                padding: 24px 18px;
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .ng-fixed-cta {
                width: calc(100vw - 20px);
                bottom: 10px;
                border-radius: 30px;
                padding: 10px 14px;
            }
        }
        @media (max-width: 768px) {
            .ng-header {
                top: 8px;
            }
            .ng-header .navbar {
                padding: 4px 12px;
                border-radius: 30px;
            }
            .ng-hero {
                padding-top: 100px;
                padding-bottom: 40px;
            }
            .ng-hero h1 {
                font-size: 26px;
            }
            .ng-hero-sub {
                font-size: 15px;
            }
            .ng-section {
                padding: 48px 0;
            }
            .ng-section-title {
                font-size: 22px;
            }
            .ng-trust-bar {
                grid-template-columns: repeat(2, 1fr);
                padding: 20px 14px;
                gap: 12px;
                margin-top: -30px;
            }
            .ng-trust-item .trust-value {
                font-size: 24px;
            }
            .ng-fixed-cta .cta-text {
                font-size: 11px;
            }
            .ng-fixed-cta .ng-btn {
                padding: 8px 16px;
                font-size: 12px;
            }
            .ng-fixed-cta .cta-text small {
                font-size: 10px;
            }
            .ng-card {
                padding: 20px 18px;
            }
            .ng-footer {
                padding: 40px 0 110px;
            }
        }
        @media (max-width: 520px) {
            .ng-hero h1 {
                font-size: 22px;
            }
            .ng-hero-actions {
                flex-direction: column;
            }
            .ng-hero-actions .ng-btn {
                width: 100%;
            }
            .ng-hero-stat-card .stat-value {
                font-size: 18px;
            }
            .ng-trust-bar {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
                padding: 16px 10px;
            }
            .ng-trust-item .trust-value {
                font-size: 20px;
            }
            .ng-trust-item .trust-label {
                font-size: 11px;
            }
            .ng-fixed-cta {
                flex-direction: column;
                gap: 8px;
                border-radius: 20px;
                text-align: center;
            }
            .ng-fixed-cta .ng-btn {
                width: 100%;
            }
            .ng-scroll-row .scroll-card {
                min-width: 240px;
            }
        }

/* roulang page: category1 */
:root {
            --ng-primary: #3A7BD5;
            --ng-primary-dark: #2F6BFF;
            --ng-primary-soft: #EAF1FC;
            --ng-accent: #F5A623;
            --ng-accent-dark: #E8940F;
            --ng-bg: #F7F9FC;
            --ng-bg-soft: #FAFBFE;
            --ng-white: #FFFFFF;
            --ng-dark: #1F2937;
            --ng-dark-2: #2D3748;
            --ng-gray: #6B7280;
            --ng-gray-light: #9CA3AF;
            --ng-border: #E5E7EB;
            --ng-radius: 14px;
            --ng-radius-sm: 10px;
            --ng-radius-lg: 18px;
            --ng-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            --ng-shadow-hover: 0 8px 24px rgba(58, 123, 213, 0.14);
            --ng-shadow-lg: 0 16px 40px rgba(31, 41, 55, 0.10);
            --ng-spacing: 80px;
            --ng-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
            --ng-transition: all 0.28s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--ng-font);
            font-size: 16px;
            line-height: 1.85;
            color: var(--ng-dark);
            background-color: var(--ng-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--ng-primary);
            text-decoration: none;
            transition: var(--ng-transition);
        }
        a:hover {
            color: var(--ng-primary-dark);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        /* Header & Nav */
        .ng-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: var(--ng-transition);
        }
        .ng-header .navbar {
            max-width: 1200px;
            margin: 0 auto;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(229, 231, 235, 0.6);
            box-shadow: 0 6px 22px rgba(31, 41, 55, 0.08);
            padding: 6px 18px;
            transition: var(--ng-transition);
        }
        .ng-header.scrolled .navbar {
            box-shadow: 0 10px 32px rgba(31, 41, 55, 0.14);
            background: rgba(255, 255, 255, 0.95);
        }
        .navbar-brand.ng-logo {
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.6px;
            color: var(--ng-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand.ng-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 800;
        }
        .navbar-brand.ng-logo .logo-text {
            color: var(--ng-dark);
        }
        .navbar-brand.ng-logo:hover {
            color: var(--ng-dark);
        }
        .navbar-brand.ng-logo .brand-highlight {
            color: var(--ng-primary);
        }
        .ng-navbar .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ng-dark-2);
            padding: 8px 16px;
            border-radius: 30px;
            margin: 0 2px;
            transition: var(--ng-transition);
            position: relative;
        }
        .ng-navbar .navbar-nav .nav-link:hover {
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
        }
        .ng-navbar .navbar-nav .nav-link.active {
            color: #fff;
            background: var(--ng-primary);
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.3);
        }
        .ng-navbar .navbar-toggler {
            border: none;
            box-shadow: none;
            font-size: 22px;
            color: var(--ng-dark);
            padding: 6px 10px;
            border-radius: 10px;
        }
        .ng-navbar .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
        }
        .ng-navbar .navbar-toggler:hover {
            background: var(--ng-primary-soft);
        }
        .ng-nav-cta {
            white-space: nowrap;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            background: var(--ng-accent);
            color: #fff;
            border: none;
            transition: var(--ng-transition);
        }
        .ng-nav-cta:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 166, 35, 0.35);
        }
        /* Page Header (分类页大标题区，非首页Hero样式) */
        .ng-page-header {
            padding-top: 140px;
            padding-bottom: 40px;
            background: linear-gradient(180deg, #FFFFFF 0%, var(--ng-bg-soft) 65%, var(--ng-bg) 100%);
            position: relative;
            overflow: hidden;
        }
        .ng-page-header::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -160px;
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(58, 123, 213, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ng-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--ng-gray);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .ng-breadcrumb a {
            color: var(--ng-gray);
            font-weight: 500;
        }
        .ng-breadcrumb a:hover {
            color: var(--ng-primary);
        }
        .ng-breadcrumb .separator {
            color: var(--ng-gray-light);
        }
        .ng-breadcrumb .current {
            color: var(--ng-primary);
            font-weight: 600;
        }
        .ng-page-header h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--ng-dark);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .ng-page-header .page-subtitle {
            font-size: 17px;
            color: var(--ng-gray);
            max-width: 720px;
            line-height: 1.85;
        }
        /* Section通用 */
        .ng-section {
            padding: 52px 0;
        }
        .ng-section-alt {
            background-color: var(--ng-white);
            border-top: 1px solid var(--ng-border);
            border-bottom: 1px solid var(--ng-border);
        }
        .ng-section-title {
            font-size: 24px;
            font-weight: 800;
            color: var(--ng-dark);
            margin-bottom: 8px;
            letter-spacing: 0.2px;
        }
        .ng-section-subtitle {
            font-size: 16px;
            color: var(--ng-gray);
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 680px;
        }
        /* 数据条 */
        .ng-stats-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            background: var(--ng-white);
            border: 1px solid var(--ng-border);
            border-radius: var(--ng-radius-lg);
            padding: 22px 28px;
            box-shadow: var(--ng-shadow);
            margin-bottom: 40px;
        }
        .ng-stat-item {
            flex: 1;
            min-width: 140px;
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .ng-stat-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--ng-primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ng-primary);
            font-size: 20px;
            flex-shrink: 0;
        }
        .ng-stat-info {
            display: flex;
            flex-direction: column;
        }
        .ng-stat-number {
            font-size: 22px;
            font-weight: 800;
            color: var(--ng-dark);
            line-height: 1.3;
        }
        .ng-stat-label {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.4;
        }
        /* 攻略列表卡片 */
        .ng-guide-card {
            background: var(--ng-white);
            border: 1px solid var(--ng-border);
            border-radius: var(--ng-radius-lg);
            overflow: hidden;
            box-shadow: var(--ng-shadow);
            transition: var(--ng-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .ng-guide-card:hover {
            box-shadow: var(--ng-shadow-hover);
            transform: translateY(-4px);
        }
        .ng-guide-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .ng-guide-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .ng-guide-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .ng-guide-card .badge-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 12px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--ng-primary);
            border-radius: 30px;
            letter-spacing: 0.3px;
        }
        .ng-guide-card .card-body {
            padding: 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .ng-guide-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .ng-guide-card .card-text {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }
        .ng-guide-card .card-meta {
            font-size: 13px;
            color: var(--ng-gray-light);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .ng-guide-card .card-meta i {
            margin-right: 4px;
        }
        /* 描述区块 */
        .ng-desc-block {
            background: var(--ng-white);
            border: 1px solid var(--ng-border);
            border-radius: var(--ng-radius-lg);
            padding: 32px 36px;
            box-shadow: var(--ng-shadow);
            position: relative;
        }
        .ng-desc-block::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--ng-primary);
            border-radius: var(--ng-radius-lg) 0 0 var(--ng-radius-lg);
        }
        .ng-desc-block p {
            font-size: 16px;
            color: var(--ng-dark-2);
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .ng-desc-block p:last-child {
            margin-bottom: 0;
        }
        /* 热门推荐横滑 */
        .ng-hot-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding-bottom: 12px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .ng-hot-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .ng-hot-scroll::-webkit-scrollbar-track {
            background: var(--ng-border);
            border-radius: 3px;
        }
        .ng-hot-scroll::-webkit-scrollbar-thumb {
            background: var(--ng-primary);
            border-radius: 3px;
        }
        .ng-hot-card {
            min-width: 280px;
            max-width: 320px;
            flex: 0 0 auto;
            background: var(--ng-white);
            border: 1px solid var(--ng-border);
            border-radius: var(--ng-radius);
            overflow: hidden;
            box-shadow: var(--ng-shadow);
            transition: var(--ng-transition);
            scroll-snap-align: start;
        }
        .ng-hot-card:hover {
            box-shadow: var(--ng-shadow-hover);
            transform: translateY(-3px);
        }
        .ng-hot-card .hot-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .ng-hot-card .hot-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .ng-hot-card:hover .hot-img img {
            transform: scale(1.06);
        }
        .ng-hot-card .hot-body {
            padding: 16px 20px;
        }
        .ng-hot-card .hot-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 6px;
            line-height: 1.5;
        }
        .ng-hot-card .hot-text {
            font-size: 13px;
            color: var(--ng-gray);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .ng-hot-card .hot-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--ng-primary);
        }
        .ng-hot-card .hot-link:hover {
            color: var(--ng-primary-dark);
        }
        .ng-hot-card .hot-link i {
            font-size: 12px;
            margin-left: 4px;
            transition: transform 0.2s ease;
        }
        .ng-hot-card .hot-link:hover i {
            transform: translateX(3px);
        }
        /* 标签云 */
        .ng-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .ng-tag {
            display: inline-block;
            padding: 7px 16px;
            background: var(--ng-white);
            border: 1px solid var(--ng-border);
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            color: var(--ng-dark-2);
            transition: var(--ng-transition);
        }
        .ng-tag:hover {
            background: var(--ng-primary-soft);
            border-color: var(--ng-primary);
            color: var(--ng-primary);
            transform: translateY(-1px);
        }
        /* FAQ */
        .ng-accordion-item {
            border: 1px solid var(--ng-border);
            border-radius: var(--ng-radius-sm);
            margin-bottom: 12px;
            background: var(--ng-white);
            overflow: hidden;
            transition: var(--ng-transition);
        }
        .ng-accordion-item:hover {
            border-color: rgba(58, 123, 213, 0.4);
        }
        .ng-accordion-item .accordion-button {
            background: var(--ng-white);
            font-size: 15px;
            font-weight: 600;
            color: var(--ng-dark);
            padding: 18px 22px;
            border-radius: var(--ng-radius-sm) !important;
            box-shadow: none;
            transition: var(--ng-transition);
        }
        .ng-accordion-item .accordion-button:not(.collapsed) {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            border-bottom: 1px solid var(--ng-border);
            border-radius: var(--ng-radius-sm) var(--ng-radius-sm) 0 0 !important;
        }
        .ng-accordion-item .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
            outline-offset: -2px;
        }
        .ng-accordion-item .accordion-button::after {
            color: var(--ng-primary);
        }
        .ng-accordion-item .accordion-body {
            font-size: 14px;
            color: var(--ng-dark-2);
            line-height: 1.85;
            padding: 18px 22px;
        }
        /* CTA区 */
        .ng-cta-box {
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: var(--ng-radius-lg);
            padding: 44px 40px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .ng-cta-box::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .ng-cta-box h2 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 10px;
            color: #fff;
        }
        .ng-cta-box p {
            font-size: 15px;
            opacity: 0.92;
            margin-bottom: 24px;
            max-width: 520px;
            line-height: 1.8;
        }
        .ng-cta-btn {
            display: inline-block;
            padding: 10px 28px;
            background: var(--ng-accent);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 30px;
            transition: var(--ng-transition);
        }
        .ng-cta-btn:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 166, 35, 0.4);
        }
        .ng-cta-btn.secondary {
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            margin-left: 10px;
        }
        .ng-cta-btn.secondary:hover {
            background: rgba(255, 255, 255, 0.3);
            box-shadow: none;
        }
        /* Footer */
        .ng-footer {
            background: var(--ng-dark);
            color: rgba(255, 255, 255, 0.78);
            padding: 56px 0 30px;
        }
        .ng-footer .footer-brand {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .ng-footer .footer-brand span {
            color: var(--ng-primary);
        }
        .ng-footer .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            max-width: 400px;
            margin-bottom: 18px;
        }
        .ng-footer .social-links {
            display: flex;
            gap: 10px;
        }
        .ng-footer .social-links a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            transition: var(--ng-transition);
        }
        .ng-footer .social-links a:hover {
            background: var(--ng-primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .ng-footer .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .ng-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ng-footer .footer-links li {
            margin-bottom: 8px;
        }
        .ng-footer .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--ng-transition);
        }
        .ng-footer .footer-links a:hover {
            color: var(--ng-primary);
        }
        .ng-footer .footer-bottom {
            margin-top: 36px;
            padding-top: 18px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }
        .ng-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .ng-footer .footer-bottom a:hover {
            color: var(--ng-primary);
        }
        /* 响应式 */
        @media (max-width: 991px) {
            .ng-header .navbar {
                padding: 8px 16px;
            }
            .ng-navbar .navbar-nav {
                padding: 10px 0 6px;
            }
            .ng-navbar .navbar-nav .nav-link {
                padding: 8px 16px;
                font-size: 14px;
            }
            .ng-nav-cta {
                margin: 10px 0 6px;
                display: inline-block;
                text-align: center;
            }
            .ng-page-header {
                padding-top: 120px;
                padding-bottom: 30px;
            }
            .ng-page-header h1 {
                font-size: 28px;
            }
            .ng-section {
                padding: 36px 0;
            }
            .ng-cta-box {
                padding: 32px 28px;
            }
            .ng-cta-btn.secondary {
                margin-left: 6px;
                margin-top: 0;
            }
        }
        @media (max-width: 767px) {
            .ng-header {
                top: 8px;
            }
            .ng-header .navbar {
                border-radius: 24px;
                padding: 4px 12px;
            }
            .navbar-brand.ng-logo {
                font-size: 19px;
            }
            .navbar-brand.ng-logo .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 13px;
                border-radius: 8px;
            }
            .ng-page-header {
                padding-top: 105px;
                padding-bottom: 24px;
            }
            .ng-page-header h1 {
                font-size: 23px;
                line-height: 1.35;
            }
            .ng-page-header .page-subtitle {
                font-size: 15px;
            }
            .ng-breadcrumb {
                font-size: 12px;
                gap: 5px;
            }
            .ng-section {
                padding: 28px 0;
            }
            .ng-section-title {
                font-size: 20px;
            }
            .ng-stats-bar {
                padding: 16px 18px;
                gap: 14px;
                flex-wrap: wrap;
            }
            .ng-stat-item {
                min-width: 45%;
                flex: 0 0 45%;
            }
            .ng-stat-number {
                font-size: 18px;
            }
            .ng-stat-label {
                font-size: 12px;
            }
            .ng-guide-card .card-body {
                padding: 16px 18px;
            }
            .ng-guide-card .card-title {
                font-size: 15px;
            }
            .ng-guide-card .card-text {
                font-size: 13px;
                line-height: 1.7;
            }
            .ng-desc-block {
                padding: 24px 22px;
            }
            .ng-desc-block p {
                font-size: 14px;
            }
            .ng-hot-card {
                min-width: 240px;
                max-width: 260px;
            }
            .ng-hot-card .hot-body {
                padding: 14px 16px;
            }
            .ng-cta-box {
                padding: 28px 22px;
            }
            .ng-cta-box h2 {
                font-size: 20px;
            }
            .ng-cta-box p {
                font-size: 14px;
            }
            .ng-cta-btn {
                padding: 8px 20px;
                font-size: 14px;
                display: block;
                text-align: center;
                margin-bottom: 8px;
            }
            .ng-cta-btn.secondary {
                margin-left: 0;
                margin-bottom: 0;
            }
            .ng-footer {
                padding: 40px 0 20px;
            }
            .ng-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                font-size: 12px;
            }
        }
        @media (max-width: 520px) {
            .ng-stat-item {
                min-width: 100%;
                flex: 0 0 100%;
            }
            .ng-stats-bar {
                gap: 12px;
            }
            .ng-page-header h1 {
                font-size: 21px;
            }
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .ng-hot-card {
                min-width: 220px;
                max-width: 240px;
            }
        }

/* roulang page: category2 */
:root {
            --ng-primary: #3A7BD5;
            --ng-primary-dark: #2F6BFF;
            --ng-primary-soft: #EAF1FC;
            --ng-accent: #F5A623;
            --ng-accent-dark: #E8940F;
            --ng-bg: #F7F9FC;
            --ng-bg-soft: #FAFBFE;
            --ng-white: #FFFFFF;
            --ng-dark: #1F2937;
            --ng-dark-2: #2D3748;
            --ng-gray: #6B7280;
            --ng-gray-light: #9CA3AF;
            --ng-border: #E5E7EB;
            --ng-radius: 14px;
            --ng-radius-sm: 10px;
            --ng-radius-lg: 18px;
            --ng-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            --ng-shadow-hover: 0 8px 24px rgba(58, 123, 213, 0.14);
            --ng-shadow-lg: 0 16px 40px rgba(31, 41, 55, 0.10);
            --ng-spacing: 80px;
            --ng-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
            --ng-transition: all 0.28s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--ng-font);
            font-size: 16px;
            line-height: 1.85;
            color: var(--ng-dark);
            background-color: var(--ng-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

        a:hover {
            color: var(--ng-primary-dark);
            text-decoration: none;
        }

        a:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header & Nav */
        .ng-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: var(--ng-transition);
        }

        .ng-header .navbar {
            max-width: 1200px;
            margin: 0 auto;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(229, 231, 235, 0.6);
            box-shadow: 0 6px 22px rgba(31, 41, 55, 0.08);
            padding: 6px 18px;
            transition: var(--ng-transition);
        }

        .ng-header.scrolled .navbar {
            box-shadow: 0 10px 32px rgba(31, 41, 55, 0.14);
            background: rgba(255, 255, 255, 0.95);
        }

        .navbar-brand.ng-logo {
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.6px;
            color: var(--ng-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .navbar-brand.ng-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 800;
        }

        .navbar-brand.ng-logo .logo-text {
            color: var(--ng-dark);
        }

        .navbar-brand.ng-logo:hover {
            color: var(--ng-dark);
        }

        .navbar-brand.ng-logo .brand-highlight {
            color: var(--ng-primary);
        }

        .ng-navbar .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ng-dark-2);
            padding: 8px 16px;
            border-radius: 30px;
            margin: 0 2px;
            transition: var(--ng-transition);
            position: relative;
        }

        .ng-navbar .navbar-nav .nav-link:hover {
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
        }

        .ng-navbar .navbar-nav .nav-link.active {
            color: #fff;
            background: var(--ng-primary);
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.3);
        }

        .ng-navbar .navbar-toggler {
            border: none;
            box-shadow: none;
            font-size: 22px;
            color: var(--ng-dark);
            padding: 6px 10px;
            border-radius: 10px;
        }

        .ng-navbar .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
        }

        .ng-navbar .navbar-toggler:hover {
            background: var(--ng-primary-soft);
        }

        .ng-nav-cta {
            white-space: nowrap;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            background: var(--ng-accent);
            color: #fff;
            border: none;
            transition: var(--ng-transition);
        }

        .ng-nav-cta:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 166, 35, 0.35);
        }

        /* Breadcrumb */
        .ng-breadcrumb-section {
            padding-top: 128px;
            padding-bottom: 20px;
            background: linear-gradient(180deg, #FFFFFF 0%, var(--ng-bg-soft) 70%, var(--ng-bg) 100%);
        }

        .ng-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--ng-gray);
            list-style: none;
            padding: 12px 0;
            margin: 0;
        }

        .ng-breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .ng-breadcrumb li a {
            color: var(--ng-gray);
        }

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

        .ng-breadcrumb .separator {
            color: var(--ng-gray-light);
        }

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

        /* Category Header */
        .ng-category-header {
            padding: 24px 0 48px;
        }

        .ng-category-header h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--ng-dark);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .ng-category-header .lead-text {
            font-size: 17px;
            line-height: 1.9;
            color: var(--ng-gray);
            max-width: 860px;
            margin-bottom: 0;
        }

        /* Section base */
        .ng-section {
            padding: 48px 0;
        }

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

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
            padding: 4px 14px;
            border-radius: 30px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 26px;
            font-weight: 800;
            color: var(--ng-dark);
            margin-bottom: 12px;
            letter-spacing: 0.4px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--ng-gray);
            line-height: 1.85;
            max-width: 760px;
            margin-bottom: 24px;
        }

        /* Step list */
        .ng-steps-list {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            box-shadow: var(--ng-shadow);
            padding: 32px;
            border: 1px solid rgba(229, 231, 235, 0.5);
        }

        .step-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--ng-border);
            align-items: flex-start;
        }

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

        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
        }

        .step-content h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 6px;
        }

        .step-content p {
            font-size: 15px;
            color: var(--ng-gray);
            margin-bottom: 0;
            line-height: 1.8;
        }

        /* Tutorial cards */
        .ng-tutorial-card {
            background: var(--ng-white);
            border-radius: var(--ng-radius);
            overflow: hidden;
            box-shadow: var(--ng-shadow);
            border: 1px solid rgba(229, 231, 235, 0.5);
            transition: var(--ng-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .ng-tutorial-card .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--ng-primary-soft);
        }

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

        .ng-tutorial-card:hover .card-image img {
            transform: scale(1.04);
        }

        .ng-tutorial-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .ng-tutorial-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
            padding: 2px 10px;
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .ng-tutorial-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 8px;
        }

        .ng-tutorial-card .card-text {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        .ng-tutorial-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--ng-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .ng-tutorial-card .card-link:hover {
            color: var(--ng-primary-dark);
            gap: 8px;
        }

        /* Hot picks */
        .ng-hot-picks {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            box-shadow: var(--ng-shadow);
            padding: 32px;
            border: 1px solid rgba(229, 231, 235, 0.5);
        }

        .hot-pick-item {
            display: flex;
            gap: 18px;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px solid var(--ng-border);
            transition: var(--ng-transition);
        }

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

        .hot-pick-item:hover {
            background: var(--ng-bg-soft);
            border-radius: var(--ng-radius-sm);
            padding-left: 12px;
            padding-right: 12px;
        }

        .hot-pick-img {
            flex-shrink: 0;
            width: 72px;
            height: 72px;
            border-radius: var(--ng-radius-sm);
            overflow: hidden;
            background: var(--ng-primary-soft);
        }

        .hot-pick-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hot-pick-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 4px;
        }

        .hot-pick-info p {
            font-size: 14px;
            color: var(--ng-gray);
            margin-bottom: 0;
        }

        .hot-pick-badge {
            margin-left: auto;
            flex-shrink: 0;
            font-size: 12px;
            font-weight: 600;
            color: var(--ng-accent-dark);
            background: rgba(245, 166, 35, 0.12);
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }

        /* FAQ */
        .ng-faq-section {
            background: var(--ng-white);
        }

        .ng-faq-item {
            border: 1px solid var(--ng-border);
            border-radius: var(--ng-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--ng-transition);
        }

        .ng-faq-item:hover {
            box-shadow: var(--ng-shadow);
        }

        .ng-faq-item .accordion-button {
            background: var(--ng-bg-soft);
            color: var(--ng-dark);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            border-radius: var(--ng-radius);
        }

        .ng-faq-item .accordion-button:not(.collapsed) {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            box-shadow: none;
        }

        .ng-faq-item .accordion-button:focus {
            box-shadow: none;
            border-color: var(--ng-primary);
        }

        .ng-faq-item .accordion-body {
            padding: 18px 24px;
            font-size: 15px;
            color: var(--ng-gray);
            line-height: 1.85;
            background: var(--ng-white);
        }

        /* CTA */
        .ng-cta-section {
            padding: 56px 0 64px;
            background: var(--ng-bg);
        }

        .ng-cta-card {
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: var(--ng-radius-lg);
            padding: 48px 40px;
            text-align: center;
            box-shadow: 0 16px 40px rgba(58, 123, 213, 0.25);
            position: relative;
            overflow: hidden;
        }

        .ng-cta-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .ng-cta-card::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -30px;
            width: 180px;
            height: 180px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }

        .ng-cta-card h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.4px;
            position: relative;
            z-index: 1;
        }

        .ng-cta-card p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .ng-cta-btn {
            display: inline-block;
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 700;
            border-radius: 40px;
            background: var(--ng-accent);
            color: #fff;
            border: none;
            transition: var(--ng-transition);
            position: relative;
            z-index: 1;
        }

        .ng-cta-btn:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 166, 35, 0.4);
        }

        .ng-cta-btn.secondary {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.35);
            margin-left: 12px;
        }

        .ng-cta-btn.secondary:hover {
            background: rgba(255, 255, 255, 0.28);
            box-shadow: none;
        }

        /* Category entry */
        .ng-category-entry {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            box-shadow: var(--ng-shadow);
            padding: 28px;
            border: 1px solid rgba(229, 231, 235, 0.5);
        }

        .category-entry-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .category-entry-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 30px;
            background: var(--ng-bg-soft);
            color: var(--ng-dark-2);
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--ng-border);
            transition: var(--ng-transition);
        }

        .category-entry-link:hover {
            background: var(--ng-primary);
            color: #fff;
            border-color: var(--ng-primary);
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.25);
        }

        /* Resource tags */
        .ng-resource-tags {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            box-shadow: var(--ng-shadow);
            padding: 28px;
            border: 1px solid rgba(229, 231, 235, 0.5);
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-item {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            background: var(--ng-bg-soft);
            color: var(--ng-gray);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--ng-border);
            transition: var(--ng-transition);
        }

        .tag-item:hover {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            border-color: var(--ng-primary-soft);
        }

        /* Common pitfalls */
        .ng-pitfalls {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            box-shadow: var(--ng-shadow);
            padding: 32px;
            border: 1px solid rgba(229, 231, 235, 0.5);
        }

        .pitfall-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--ng-border);
            align-items: flex-start;
        }

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

        .pitfall-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(245, 166, 35, 0.12);
            color: var(--ng-accent-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .pitfall-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 4px;
        }

        .pitfall-content p {
            font-size: 14px;
            color: var(--ng-gray);
            margin-bottom: 0;
            line-height: 1.75;
        }

        /* Footer */
        .ng-footer {
            background: var(--ng-dark);
            color: #fff;
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .ng-footer .footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.6px;
        }

        .ng-footer .footer-brand span {
            color: var(--ng-accent);
        }

        .ng-footer .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 420px;
        }

        .ng-footer .social-links {
            display: flex;
            gap: 12px;
        }

        .ng-footer .social-links a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: var(--ng-transition);
        }

        .ng-footer .social-links a:hover {
            background: var(--ng-primary);
            transform: translateY(-2px);
        }

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

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

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

        .ng-footer .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: var(--ng-transition);
        }

        .ng-footer .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .ng-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            margin-top: 32px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }

        .ng-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }

        .ng-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .ng-header .navbar {
                max-width: calc(100% - 24px);
            }

            .ng-category-header h1 {
                font-size: 28px;
            }

            .ng-cta-card {
                padding: 36px 24px;
            }

            .ng-cta-card h2 {
                font-size: 23px;
            }

            .section-title {
                font-size: 22px;
            }
        }

        @media (max-width: 768px) {
            .ng-breadcrumb-section {
                padding-top: 112px;
            }

            .ng-category-header h1 {
                font-size: 24px;
            }

            .ng-category-header .lead-text {
                font-size: 15px;
            }

            .section-title {
                font-size: 20px;
            }

            .ng-steps-list,
            .ng-hot-picks,
            .ng-resource-tags,
            .ng-pitfalls,
            .ng-category-entry {
                padding: 20px;
            }

            .step-item {
                flex-direction: column;
                gap: 12px;
            }

            .step-number {
                width: 40px;
                height: 40px;
                font-size: 16px;
            }

            .hot-pick-item {
                flex-wrap: wrap;
            }

            .hot-pick-badge {
                margin-left: 0;
                width: 100%;
                text-align: left;
                padding-left: 90px;
            }

            .ng-cta-btn {
                display: block;
                width: 100%;
                max-width: 300px;
                margin-left: auto !important;
                margin-right: auto;
                margin-bottom: 10px;
            }

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

        @media (max-width: 576px) {
            .ng-category-header h1 {
                font-size: 22px;
            }

            .section-title {
                font-size: 18px;
            }

            .ng-tutorial-card .card-body {
                padding: 18px;
            }
        }

        /* Additional mobile nav handling */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(255, 255, 255, 0.98);
                border-radius: var(--ng-radius);
                padding: 16px;
                margin-top: 10px;
                box-shadow: var(--ng-shadow-lg);
                border: 1px solid var(--ng-border);
            }

            .ng-navbar .navbar-nav .nav-link {
                padding: 10px 16px;
                margin-bottom: 4px;
            }

            .ng-nav-cta {
                display: inline-block;
                margin-top: 8px;
                text-align: center;
            }
        }

/* roulang page: category3 */
:root {
            --ng-primary: #3A7BD5;
            --ng-primary-dark: #2F6BFF;
            --ng-primary-soft: #EAF1FC;
            --ng-accent: #F5A623;
            --ng-accent-dark: #E8940F;
            --ng-bg: #F7F9FC;
            --ng-bg-soft: #FAFBFE;
            --ng-white: #FFFFFF;
            --ng-dark: #1F2937;
            --ng-dark-2: #2D3748;
            --ng-gray: #6B7280;
            --ng-gray-light: #9CA3AF;
            --ng-border: #E5E7EB;
            --ng-radius: 14px;
            --ng-radius-sm: 10px;
            --ng-radius-lg: 18px;
            --ng-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            --ng-shadow-hover: 0 8px 24px rgba(58, 123, 213, 0.14);
            --ng-shadow-lg: 0 16px 40px rgba(31, 41, 55, 0.10);
            --ng-spacing: 80px;
            --ng-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
            --ng-transition: all 0.28s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--ng-font);
            font-size: 16px;
            line-height: 1.85;
            color: var(--ng-dark);
            background-color: var(--ng-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--ng-primary);
            text-decoration: none;
            transition: var(--ng-transition);
        }
        a:hover {
            color: var(--ng-primary-dark);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header & Nav */
        .ng-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: var(--ng-transition);
        }
        .ng-header .navbar {
            max-width: 1200px;
            margin: 0 auto;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(229, 231, 235, 0.6);
            box-shadow: 0 6px 22px rgba(31, 41, 55, 0.08);
            padding: 6px 18px;
            transition: var(--ng-transition);
        }
        .ng-header.scrolled .navbar {
            box-shadow: 0 10px 32px rgba(31, 41, 55, 0.14);
            background: rgba(255, 255, 255, 0.95);
        }
        .navbar-brand.ng-logo {
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.6px;
            color: var(--ng-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand.ng-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 800;
        }
        .navbar-brand.ng-logo .logo-text {
            color: var(--ng-dark);
        }
        .navbar-brand.ng-logo:hover {
            color: var(--ng-dark);
        }
        .navbar-brand.ng-logo .brand-highlight {
            color: var(--ng-primary);
        }
        .ng-navbar .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ng-dark-2);
            padding: 8px 16px;
            border-radius: 30px;
            margin: 0 2px;
            transition: var(--ng-transition);
            position: relative;
        }
        .ng-navbar .navbar-nav .nav-link:hover {
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
        }
        .ng-navbar .navbar-nav .nav-link.active {
            color: #fff;
            background: var(--ng-primary);
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.3);
        }
        .ng-navbar .navbar-toggler {
            border: none;
            box-shadow: none;
            font-size: 22px;
            color: var(--ng-dark);
            padding: 6px 10px;
            border-radius: 10px;
        }
        .ng-navbar .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
        }
        .ng-navbar .navbar-toggler:hover {
            background: var(--ng-primary-soft);
        }
        .ng-nav-cta {
            white-space: nowrap;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            background: var(--ng-accent);
            color: #fff;
            border: none;
            transition: var(--ng-transition);
        }
        .ng-nav-cta:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 166, 35, 0.35);
        }

        /* Breadcrumb */
        .ng-breadcrumb-wrap {
            padding-top: 140px;
            padding-bottom: 8px;
            background: var(--ng-bg);
        }
        .ng-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--ng-gray);
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .ng-breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .ng-breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--ng-gray-light);
            margin-left: 2px;
        }
        .ng-breadcrumb a {
            color: var(--ng-gray);
            font-weight: 500;
        }
        .ng-breadcrumb a:hover {
            color: var(--ng-primary);
        }
        .ng-breadcrumb .current {
            color: var(--ng-primary);
            font-weight: 600;
        }

        /* Page header */
        .ng-page-header {
            padding: 48px 0 40px;
            background: linear-gradient(180deg, var(--ng-bg) 0%, var(--ng-bg-soft) 100%);
            position: relative;
            overflow: hidden;
        }
        .ng-page-header::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(58, 123, 213, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ng-page-header h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--ng-dark);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .ng-page-header .lead {
            font-size: 16px;
            color: var(--ng-gray);
            max-width: 760px;
            line-height: 1.9;
        }

        /* Section base */
        .ng-section {
            padding: 64px 0;
        }
        .ng-section-sm {
            padding: 48px 0;
        }
        .ng-section-alt {
            background: var(--ng-white);
        }
        .ng-section-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 12px;
            letter-spacing: 0.2px;
        }
        .ng-section-subtitle {
            font-size: 15px;
            color: var(--ng-gray);
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .ng-divider {
            width: 56px;
            height: 4px;
            background: var(--ng-accent);
            border-radius: 4px;
            margin-bottom: 16px;
        }

        /* Cards */
        .ng-card {
            background: var(--ng-white);
            border-radius: var(--ng-radius);
            box-shadow: var(--ng-shadow);
            overflow: hidden;
            transition: var(--ng-transition);
            border: 1px solid rgba(229, 231, 235, 0.5);
            height: 100%;
        }
        .ng-card:hover {
            box-shadow: var(--ng-shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(58, 123, 213, 0.2);
        }
        .ng-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--ng-primary-soft);
        }
        .ng-card-body {
            padding: 20px 22px 22px;
        }
        .ng-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .ng-card-text {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.75;
            margin-bottom: 12px;
        }
        .ng-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--ng-gray-light);
            margin-bottom: 10px;
        }
        .ng-card-meta i {
            color: var(--ng-primary);
            font-size: 12px;
        }
        .ng-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            white-space: nowrap;
        }
        .ng-badge-accent {
            background: rgba(245, 166, 35, 0.15);
            color: var(--ng-accent-dark);
        }
        .ng-badge-green {
            background: rgba(16, 185, 129, 0.12);
            color: #059669;
        }

        /* News list */
        .ng-news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .ng-news-item {
            background: var(--ng-white);
            border-radius: var(--ng-radius);
            box-shadow: var(--ng-shadow);
            padding: 18px 22px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            transition: var(--ng-transition);
            border: 1px solid rgba(229, 231, 235, 0.5);
        }
        .ng-news-item:hover {
            box-shadow: var(--ng-shadow-hover);
            border-color: rgba(58, 123, 213, 0.2);
            transform: translateX(2px);
        }
        .ng-news-item .news-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            background: var(--ng-primary-soft);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ng-primary);
            font-size: 18px;
        }
        .ng-news-item .news-content {
            flex: 1;
            min-width: 0;
        }
        .ng-news-item .news-title {
            font-size: 16px;
            font-weight: 650;
            color: var(--ng-dark-2);
            margin-bottom: 4px;
            line-height: 1.55;
        }
        .ng-news-item .news-desc {
            font-size: 14px;
            color: var(--ng-gray);
            margin-bottom: 6px;
            line-height: 1.7;
        }
        .ng-news-item .news-meta {
            font-size: 12px;
            color: var(--ng-gray-light);
            display: flex;
            gap: 14px;
            align-items: center;
        }

        /* Featured cards */
        .ng-featured-card {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            box-shadow: var(--ng-shadow);
            overflow: hidden;
            transition: var(--ng-transition);
            border: 1px solid rgba(229, 231, 235, 0.5);
            height: 100%;
            position: relative;
        }
        .ng-featured-card:hover {
            box-shadow: var(--ng-shadow-hover);
            transform: translateY(-4px);
        }
        .ng-featured-card .featured-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .ng-featured-card .featured-body {
            padding: 20px 22px 22px;
        }
        .ng-featured-card .featured-tag {
            position: absolute;
            top: 12px;
            left: 14px;
            background: var(--ng-accent);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }

        /* Tags cloud */
        .ng-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .ng-tag-cloud a {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 30px;
            background: var(--ng-white);
            border: 1px solid var(--ng-border);
            color: var(--ng-dark-2);
            font-size: 13px;
            font-weight: 500;
            transition: var(--ng-transition);
        }
        .ng-tag-cloud a:hover {
            background: var(--ng-primary);
            color: #fff;
            border-color: var(--ng-primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.25);
        }

        /* FAQ */
        .ng-faq-item {
            background: var(--ng-white);
            border-radius: var(--ng-radius);
            box-shadow: var(--ng-shadow);
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid rgba(229, 231, 235, 0.5);
            transition: var(--ng-transition);
        }
        .ng-faq-item:hover {
            box-shadow: var(--ng-shadow-hover);
        }
        .ng-faq-item .accordion-button {
            background: var(--ng-white);
            color: var(--ng-dark);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: var(--ng-transition);
        }
        .ng-faq-item .accordion-button:not(.collapsed) {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            box-shadow: none;
        }
        .ng-faq-item .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
            outline-offset: -2px;
        }
        .ng-faq-item .accordion-body {
            padding: 16px 22px 20px;
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.8;
            border-top: 1px solid var(--ng-border);
        }

        /* CTA section */
        .ng-cta-section {
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: var(--ng-radius-lg);
            padding: 48px 40px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .ng-cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ng-cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }
        .ng-cta-section p {
            font-size: 15px;
            opacity: 0.9;
            margin-bottom: 24px;
            max-width: 620px;
            line-height: 1.8;
        }
        .ng-btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 30px;
            background: #fff;
            color: var(--ng-primary);
            font-weight: 600;
            font-size: 15px;
            border: none;
            transition: var(--ng-transition);
        }
        .ng-btn-white:hover {
            background: var(--ng-accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
        }
        .ng-btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 30px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid rgba(255, 255, 255, 0.6);
            transition: var(--ng-transition);
        }
        .ng-btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* Footer */
        .ng-footer {
            background: var(--ng-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 64px 0 28px;
            margin-top: 40px;
        }
        .ng-footer .footer-brand {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .ng-footer .footer-brand span {
            color: var(--ng-primary);
        }
        .ng-footer .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 420px;
            margin-bottom: 16px;
        }
        .ng-footer .social-links {
            display: flex;
            gap: 12px;
        }
        .ng-footer .social-links a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            transition: var(--ng-transition);
        }
        .ng-footer .social-links a:hover {
            background: var(--ng-primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .ng-footer .footer-title {
            font-size: 15px;
            font-weight: 650;
            color: #fff;
            margin-bottom: 14px;
        }
        .ng-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ng-footer .footer-links li {
            margin-bottom: 8px;
        }
        .ng-footer .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--ng-transition);
        }
        .ng-footer .footer-links a:hover {
            color: var(--ng-primary);
            padding-left: 4px;
        }
        .ng-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .ng-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .ng-footer .footer-bottom a:hover {
            color: var(--ng-primary);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .ng-header .navbar {
                border-radius: 24px;
                padding: 6px 12px;
            }
            .ng-navbar .navbar-collapse {
                background: #fff;
                border-radius: 16px;
                padding: 12px 16px;
                margin-top: 8px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            }
            .ng-navbar .navbar-nav .nav-link {
                padding: 10px 14px;
                border-radius: 10px;
            }
            .ng-nav-cta {
                margin: 8px 0 4px;
                text-align: center;
                display: block;
            }
            .ng-page-header h1 {
                font-size: 26px;
            }
            .ng-cta-section {
                padding: 32px 24px;
            }
        }
        @media (max-width: 767.98px) {
            .ng-breadcrumb-wrap {
                padding-top: 120px;
            }
            .ng-section {
                padding: 40px 0;
            }
            .ng-section-sm {
                padding: 32px 0;
            }
            .ng-page-header {
                padding: 28px 0 32px;
            }
            .ng-page-header h1 {
                font-size: 22px;
            }
            .ng-news-item {
                flex-direction: column;
                gap: 10px;
                padding: 14px 16px;
            }
            .ng-cta-section h2 {
                font-size: 20px;
            }
            .ng-cta-section {
                border-radius: var(--ng-radius);
            }
            .ng-footer {
                padding: 40px 0 20px;
            }
            .ng-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            .ng-page-header h1 {
                font-size: 20px;
            }
            .ng-breadcrumb {
                font-size: 12px;
            }
            .ng-section-title {
                font-size: 20px;
            }
            .ng-btn-white,
            .ng-btn-outline-white {
                width: 100%;
                justify-content: center;
                font-size: 14px;
                padding: 10px 20px;
            }
        }

/* roulang page: category4 */
:root {
            --ng-primary: #3A7BD5;
            --ng-primary-dark: #2F6BFF;
            --ng-primary-soft: #EAF1FC;
            --ng-accent: #F5A623;
            --ng-accent-dark: #E8940F;
            --ng-bg: #F7F9FC;
            --ng-bg-soft: #FAFBFE;
            --ng-white: #FFFFFF;
            --ng-dark: #1F2937;
            --ng-dark-2: #2D3748;
            --ng-gray: #6B7280;
            --ng-gray-light: #9CA3AF;
            --ng-border: #E5E7EB;
            --ng-radius: 14px;
            --ng-radius-sm: 10px;
            --ng-radius-lg: 18px;
            --ng-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            --ng-shadow-hover: 0 8px 24px rgba(58, 123, 213, 0.14);
            --ng-shadow-lg: 0 16px 40px rgba(31, 41, 55, 0.10);
            --ng-spacing: 80px;
            --ng-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
            --ng-transition: all 0.28s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--ng-font);
            font-size: 16px;
            line-height: 1.85;
            color: var(--ng-dark);
            background-color: var(--ng-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--ng-primary-dark);
            text-decoration: none;
        }

        a:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        button:focus-visible {
            outline: 2px solid var(--ng-primary);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header & Nav */
        .ng-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1050;
            transition: var(--ng-transition);
        }

        .ng-header .navbar {
            max-width: 1200px;
            margin: 0 auto;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(229, 231, 235, 0.6);
            box-shadow: 0 6px 22px rgba(31, 41, 55, 0.08);
            padding: 6px 18px;
            transition: var(--ng-transition);
        }

        .ng-header.scrolled .navbar {
            box-shadow: 0 10px 32px rgba(31, 41, 55, 0.14);
            background: rgba(255, 255, 255, 0.95);
        }

        .navbar-brand.ng-logo {
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.6px;
            color: var(--ng-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .navbar-brand.ng-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 800;
        }

        .navbar-brand.ng-logo .logo-text {
            color: var(--ng-dark);
        }

        .navbar-brand.ng-logo:hover {
            color: var(--ng-dark);
        }

        .navbar-brand.ng-logo .brand-highlight {
            color: var(--ng-primary);
        }

        .ng-navbar .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ng-dark-2);
            padding: 8px 16px;
            border-radius: 30px;
            margin: 0 2px;
            transition: var(--ng-transition);
            position: relative;
        }

        .ng-navbar .navbar-nav .nav-link:hover {
            color: var(--ng-primary);
            background: var(--ng-primary-soft);
        }

        .ng-navbar .navbar-nav .nav-link.active {
            color: #fff;
            background: var(--ng-primary);
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.3);
        }

        .ng-navbar .navbar-toggler {
            border: none;
            box-shadow: none;
            font-size: 22px;
            color: var(--ng-dark);
            padding: 6px 10px;
            border-radius: 10px;
        }

        .ng-navbar .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
        }

        .ng-navbar .navbar-toggler:hover {
            background: var(--ng-primary-soft);
        }

        .ng-nav-cta {
            white-space: nowrap;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            background: var(--ng-accent);
            color: #fff;
            border: none;
            transition: var(--ng-transition);
        }

        .ng-nav-cta:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 166, 35, 0.35);
        }

        /* Breadcrumb */
        .ng-breadcrumb-wrap {
            padding-top: 130px;
            padding-bottom: 20px;
            background: var(--ng-bg-soft);
        }

        .breadcrumb {
            margin-bottom: 0;
            font-size: 14px;
            background: transparent;
        }

        .breadcrumb-item a {
            color: var(--ng-gray);
        }

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

        .breadcrumb-item.active {
            color: var(--ng-dark);
            font-weight: 500;
        }

        /* Page Header */
        .ng-page-header {
            padding: 28px 0 44px;
            background: var(--ng-bg-soft);
            border-bottom: 1px solid var(--ng-border);
        }

        .ng-page-header h1 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--ng-dark);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .ng-page-header .page-desc {
            font-size: 17px;
            color: var(--ng-gray);
            max-width: 820px;
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* Section */
        .ng-section {
            padding: var(--ng-spacing) 0;
        }

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

        .ng-section-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .ng-section-subtitle {
            font-size: 15px;
            color: var(--ng-gray);
            margin-bottom: 32px;
            line-height: 1.7;
        }

        /* Review Cards */
        .review-card {
            background: var(--ng-white);
            border-radius: var(--ng-radius);
            box-shadow: var(--ng-shadow);
            border: 1px solid var(--ng-border);
            overflow: hidden;
            transition: var(--ng-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .review-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ng-shadow-hover);
            border-color: rgba(58, 123, 213, 0.25);
        }

        .review-card .review-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }

        .review-card .review-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .review-card .review-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--ng-gray);
            margin-bottom: 10px;
        }

        .review-card .review-tag {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }

        .review-card .review-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .review-card .review-text {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        .review-card .review-rating {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--ng-dark);
            font-weight: 600;
            margin-bottom: 16px;
        }

        .review-card .review-rating .stars {
            color: var(--ng-accent);
            letter-spacing: 2px;
        }

        .btn-outline-ng {
            align-self: flex-start;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            border: 1.5px solid var(--ng-primary);
            color: var(--ng-primary);
            background: transparent;
            transition: var(--ng-transition);
        }

        .btn-outline-ng:hover {
            background: var(--ng-primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(58, 123, 213, 0.3);
        }

        .btn-ng {
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 30px;
            background: var(--ng-accent);
            color: #fff;
            border: none;
            transition: var(--ng-transition);
        }

        .btn-ng:hover {
            background: var(--ng-accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(245, 166, 35, 0.35);
        }

        /* Featured Review */
        .featured-review {
            background: var(--ng-white);
            border-radius: var(--ng-radius-lg);
            box-shadow: var(--ng-shadow-lg);
            overflow: hidden;
            border: 1px solid var(--ng-border);
        }

        .featured-review .featured-img {
            height: 100%;
            min-height: 280px;
            object-fit: cover;
            width: 100%;
        }

        .featured-review .featured-body {
            padding: 36px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-review .featured-label {
            color: var(--ng-accent);
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        .featured-review .featured-title {
            font-size: 24px;
            font-weight: 800;
            color: var(--ng-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .featured-review .featured-text {
            font-size: 15px;
            color: var(--ng-gray);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        /* Rating Data Bar */
        .rating-data-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .rating-data-row .rating-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--ng-dark-2);
            min-width: 110px;
        }

        .rating-data-row .progress {
            flex: 1;
            height: 8px;
            border-radius: 4px;
            background: var(--ng-border);
            overflow: hidden;
        }

        .rating-data-row .progress-bar {
            background: linear-gradient(90deg, var(--ng-primary) 0%, var(--ng-accent) 100%);
            border-radius: 4px;
        }

        .rating-data-row .rating-value {
            font-size: 14px;
            font-weight: 700;
            color: var(--ng-dark);
            min-width: 40px;
            text-align: right;
        }

        /* FAQ */
        .ng-faq-item {
            background: var(--ng-white);
            border-radius: var(--ng-radius-sm);
            border: 1px solid var(--ng-border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--ng-transition);
        }

        .ng-faq-item:hover {
            border-color: rgba(58, 123, 213, 0.3);
            box-shadow: var(--ng-shadow);
        }

        .ng-faq-item .accordion-button {
            background: var(--ng-white);
            color: var(--ng-dark);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 22px;
            box-shadow: none;
            border-radius: var(--ng-radius-sm);
        }

        .ng-faq-item .accordion-button:not(.collapsed) {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
        }

        .ng-faq-item .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--ng-primary);
            outline-offset: -2px;
        }

        .ng-faq-item .accordion-body {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.8;
            padding: 18px 22px 22px;
            background: var(--ng-bg-soft);
        }

        /* CTA Section */
        .ng-cta-section {
            background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
            border-radius: var(--ng-radius-lg);
            padding: 48px 56px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .ng-cta-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -40px;
            width: 240px;
            height: 240px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .ng-cta-section h2 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 10px;
            color: #fff;
        }

        .ng-cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            line-height: 1.75;
            max-width: 560px;
        }

        .btn-white {
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 30px;
            background: #fff;
            color: var(--ng-primary);
            border: none;
            transition: var(--ng-transition);
        }

        .btn-white:hover {
            background: var(--ng-primary-soft);
            color: var(--ng-primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(255, 255, 255, 0.3);
        }

        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-chip {
            display: inline-block;
            padding: 6px 18px;
            background: var(--ng-white);
            border: 1px solid var(--ng-border);
            border-radius: 30px;
            font-size: 13px;
            color: var(--ng-gray);
            transition: var(--ng-transition);
        }

        .tag-chip:hover {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            border-color: rgba(58, 123, 213, 0.3);
        }

        /* Footer */
        .ng-footer {
            background: var(--ng-white);
            border-top: 1px solid var(--ng-border);
            padding: 56px 0 40px;
            margin-top: 40px;
        }

        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: var(--ng-dark);
            margin-bottom: 14px;
        }

        .footer-brand span {
            color: var(--ng-primary);
        }

        .footer-desc {
            font-size: 14px;
            color: var(--ng-gray);
            line-height: 1.8;
            margin-bottom: 18px;
            max-width: 360px;
        }

        .social-links {
            display: flex;
            gap: 12px;
        }

        .social-links a {
            width: 38px;
            height: 38px;
            background: var(--ng-bg-soft);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ng-gray);
            font-size: 16px;
            transition: var(--ng-transition);
        }

        .social-links a:hover {
            background: var(--ng-primary-soft);
            color: var(--ng-primary);
            transform: translateY(-2px);
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--ng-dark);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

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

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

        .footer-links a {
            font-size: 14px;
            color: var(--ng-gray);
            transition: var(--ng-transition);
        }

        .footer-links a:hover {
            color: var(--ng-primary);
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--ng-border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--ng-gray-light);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .ng-header {
                top: 10px;
            }
            .ng-header .navbar {
                border-radius: 30px;
                padding: 6px 12px;
            }
            .ng-page-header h1 {
                font-size: 28px;
            }
            .ng-section {
                padding: 56px 0;
            }
            .featured-review .featured-body {
                padding: 28px 24px;
            }
            .ng-cta-section {
                padding: 36px 28px;
            }
        }

        @media (max-width: 767.98px) {
            .ng-header {
                top: 6px;
            }
            .ng-header .navbar {
                border-radius: 22px;
                padding: 4px 10px;
            }
            .ng-navbar .navbar-nav .nav-link {
                padding: 8px 14px;
                font-size: 14px;
            }
            .ng-nav-cta {
                display: none;
            }
            .ng-page-header {
                padding: 20px 0 32px;
            }
            .ng-page-header h1 {
                font-size: 24px;
            }
            .ng-section {
                padding: 40px 0;
            }
            .ng-section-title {
                font-size: 20px;
            }
            .review-card .review-img {
                height: 160px;
            }
            .featured-review .featured-img {
                min-height: 200px;
            }
            .ng-cta-section h2 {
                font-size: 22px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 519.98px) {
            .ng-page-header h1 {
                font-size: 21px;
            }
            .ng-page-header .page-desc {
                font-size: 15px;
            }
            .review-card .review-body {
                padding: 16px 18px 20px;
            }
            .featured-review .featured-body {
                padding: 20px 18px;
            }
            .ng-cta-section {
                padding: 28px 18px;
            }
            .ng-cta-section h2 {
                font-size: 19px;
            }
            .rating-data-row .rating-label {
                min-width: 80px;
                font-size: 13px;
            }
        }

/* roulang page: category5 */
:root {
  --ng-primary: #3A7BD5;
  --ng-primary-dark: #2F6BFF;
  --ng-primary-soft: #EAF1FC;
  --ng-accent: #F5A623;
  --ng-accent-dark: #E8940F;
  --ng-bg: #F7F9FC;
  --ng-bg-soft: #FAFBFE;
  --ng-white: #FFFFFF;
  --ng-dark: #1F2937;
  --ng-dark-2: #2D3748;
  --ng-gray: #6B7280;
  --ng-gray-light: #9CA3AF;
  --ng-border: #E5E7EB;
  --ng-radius: 14px;
  --ng-radius-sm: 10px;
  --ng-radius-lg: 18px;
  --ng-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --ng-shadow-hover: 0 8px 24px rgba(58, 123, 213, 0.14);
  --ng-shadow-lg: 0 16px 40px rgba(31, 41, 55, 0.10);
  --ng-spacing: 80px;
  --ng-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
  --ng-transition: all 0.28s ease;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--ng-font);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ng-dark);
  background-color: var(--ng-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--ng-primary); text-decoration: none; transition: var(--ng-transition); }
a:hover { color: var(--ng-primary-dark); text-decoration: none; }
a:focus-visible { outline: 2px solid var(--ng-primary); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
button:focus-visible { outline: 2px solid var(--ng-primary); outline-offset: 2px; }
.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }

/* Header & Nav */
.ng-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1050;
  transition: var(--ng-transition);
}
.ng-header .navbar {
  max-width: 1200px;
  margin: 0 auto;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(229, 231, 235, 0.6);
  box-shadow: 0 6px 22px rgba(31, 41, 55, 0.08);
  padding: 6px 18px;
  transition: var(--ng-transition);
}
.ng-header.scrolled .navbar {
  box-shadow: 0 10px 32px rgba(31, 41, 55, 0.14);
  background: rgba(255, 255, 255, 0.95);
}
.navbar-brand.ng-logo {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.6px;
  color: var(--ng-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar-brand.ng-logo .logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  font-weight: 800;
}
.navbar-brand.ng-logo .logo-text { color: var(--ng-dark); }
.navbar-brand.ng-logo:hover { color: var(--ng-dark); }
.navbar-brand.ng-logo .brand-highlight { color: var(--ng-primary); }
.ng-navbar .navbar-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--ng-dark-2);
  padding: 8px 16px;
  border-radius: 30px;
  margin: 0 2px;
  transition: var(--ng-transition);
  position: relative;
}
.ng-navbar .navbar-nav .nav-link:hover { color: var(--ng-primary); background: var(--ng-primary-soft); }
.ng-navbar .navbar-nav .nav-link.active {
  color: #fff;
  background: var(--ng-primary);
  box-shadow: 0 4px 12px rgba(58, 123, 213, 0.3);
}
.ng-navbar .navbar-toggler {
  border: none;
  box-shadow: none;
  font-size: 22px;
  color: var(--ng-dark);
  padding: 6px 10px;
  border-radius: 10px;
}
.ng-navbar .navbar-toggler:focus { box-shadow: none; outline: 2px solid var(--ng-primary); }
.ng-navbar .navbar-toggler:hover { background: var(--ng-primary-soft); }
.ng-nav-cta {
  white-space: nowrap;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 30px;
  background: var(--ng-accent);
  color: #fff;
  border: none;
  transition: var(--ng-transition);
}
.ng-nav-cta:hover {
  background: var(--ng-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(245, 166, 35, 0.35);
}

/* Page Head */
.ng-page-head {
  padding-top: 150px;
  padding-bottom: 40px;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--ng-bg-soft) 65%, var(--ng-bg) 100%);
}
.ng-breadcrumb {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
  font-size: 14px;
  color: var(--ng-gray);
  flex-wrap: wrap;
  gap: 6px;
}
.ng-breadcrumb li { display: flex; align-items: center; }
.ng-breadcrumb li a { color: var(--ng-gray); }
.ng-breadcrumb li a:hover { color: var(--ng-primary); }
.ng-breadcrumb .sep { margin: 0 6px; color: var(--ng-gray-light); }
.ng-breadcrumb .current { color: var(--ng-primary); font-weight: 500; }
.ng-page-head h1 {
  font-size: 34px;
  font-weight: 800;
  color: var(--ng-dark);
  margin-bottom: 14px;
  letter-spacing: 0.8px;
}
.ng-page-head .lead {
  font-size: 17px;
  color: var(--ng-gray);
  max-width: 820px;
  line-height: 1.9;
  margin-bottom: 0;
}

/* Section Base */
.ng-section { padding: var(--ng-spacing) 0; }
.ng-section-sm { padding: 52px 0; }
.ng-section-title { font-size: 24px; font-weight: 800; color: var(--ng-dark); margin-bottom: 12px; }
.ng-section-sub { font-size: 15px; color: var(--ng-gray); margin-bottom: 32px; max-width: 700px; line-height: 1.8; }

/* Category Sidebar Card */
.ng-side-card {
  background: var(--ng-white);
  border-radius: var(--ng-radius-lg);
  box-shadow: var(--ng-shadow);
  border: 1px solid var(--ng-border);
  padding: 28px;
  margin-bottom: 28px;
}
.ng-side-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ng-dark);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.ng-side-card h3 i { color: var(--ng-primary); }
.ng-tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.ng-tag-list a {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 30px;
  background: var(--ng-primary-soft);
  color: var(--ng-primary);
  border: 1px solid transparent;
  transition: var(--ng-transition);
}
.ng-tag-list a:hover {
  background: var(--ng-primary);
  color: #fff;
  border-color: var(--ng-primary);
}

/* FAQ Accordion */
.ng-faq-acc .accordion-item {
  border: 1px solid var(--ng-border);
  border-radius: var(--ng-radius) !important;
  margin-bottom: 16px;
  background: var(--ng-white);
  overflow: hidden;
  box-shadow: var(--ng-shadow);
  transition: var(--ng-transition);
}
.ng-faq-acc .accordion-item:hover { box-shadow: var(--ng-shadow-hover); }
.ng-faq-acc .accordion-button {
  background: var(--ng-white);
  color: var(--ng-dark);
  font-weight: 600;
  font-size: 16px;
  padding: 18px 24px;
  border-radius: var(--ng-radius);
  transition: var(--ng-transition);
}
.ng-faq-acc .accordion-button:not(.collapsed) {
  background: var(--ng-primary-soft);
  color: var(--ng-primary-dark);
  box-shadow: none;
}
.ng-faq-acc .accordion-button:focus {
  box-shadow: none;
  outline: 2px solid var(--ng-primary);
  outline-offset: -2px;
}
.ng-faq-acc .accordion-button::after {
  background-size: 1.25rem;
  transition: var(--ng-transition);
}
.ng-faq-acc .accordion-body {
  color: var(--ng-gray);
  font-size: 15px;
  padding: 18px 24px 22px;
  line-height: 1.9;
  border-top: 1px solid var(--ng-border);
}
.ng-faq-acc .accordion-button i {
  color: var(--ng-primary);
  margin-right: 10px;
  font-size: 17px;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

/* Featured Card */
.ng-feature-card {
  background: var(--ng-white);
  border-radius: var(--ng-radius-lg);
  box-shadow: var(--ng-shadow);
  border: 1px solid var(--ng-border);
  overflow: hidden;
  height: 100%;
  transition: var(--ng-transition);
}
.ng-feature-card:hover { box-shadow: var(--ng-shadow-hover); transform: translateY(-2px); }
.ng-feature-card img { width: 100%; height: 150px; object-fit: cover; }
.ng-feature-card .body { padding: 22px; }
.ng-feature-card .badge-cat {
  display: inline-block;
  padding: 3px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  background: var(--ng-primary-soft);
  color: var(--ng-primary);
  margin-bottom: 10px;
}
.ng-feature-card h3 { font-size: 16px; font-weight: 700; color: var(--ng-dark); margin-bottom: 8px; line-height: 1.6; }
.ng-feature-card p { font-size: 14px; color: var(--ng-gray); margin-bottom: 12px; line-height: 1.7; }
.ng-feature-card .meta { font-size: 13px; color: var(--ng-gray-light); display: flex; gap: 14px; }

/* CTA Section */
.ng-cta-box {
  background: linear-gradient(135deg, var(--ng-primary) 0%, var(--ng-primary-dark) 100%);
  border-radius: 24px;
  padding: 52px 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(58, 123, 213, 0.22);
}
.ng-cta-box::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 260px;
  height: 260px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  pointer-events: none;
}
.ng-cta-box::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -50px;
  width: 220px;
  height: 220px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  pointer-events: none;
}
.ng-cta-box h2 { font-size: 26px; font-weight: 800; margin-bottom: 12px; position: relative; z-index: 1; }
.ng-cta-box p { font-size: 15px; opacity: 0.92; max-width: 560px; margin-bottom: 24px; position: relative; z-index: 1; line-height: 1.8; }
.ng-btn-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 30px;
  background: #fff;
  color: var(--ng-primary);
  border: none;
  transition: var(--ng-transition);
  position: relative;
  z-index: 1;
}
.ng-btn-light:hover { background: var(--ng-accent); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.15); }
.ng-btn-outline-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 30px;
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.6);
  transition: var(--ng-transition);
  position: relative;
  z-index: 1;
}
.ng-btn-outline-light:hover { background: rgba(255,255,255,0.15); color: #fff; transform: translateY(-2px); }

/* Q-group heading */
.ng-qgroup {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ng-primary-soft);
}
.ng-qgroup .icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--ng-primary-soft);
  color: var(--ng-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.ng-qgroup span { font-size: 18px; font-weight: 700; color: var(--ng-dark); }

/* Helpful note */
.ng-note {
  background: var(--ng-primary-soft);
  border-radius: var(--ng-radius);
  padding: 20px 24px;
  border-left: 4px solid var(--ng-primary);
  margin-top: 8px;
}
.ng-note p { font-size: 14px; color: var(--ng-dark-2); margin: 0; line-height: 1.8; }

/* Footer */
.ng-footer {
  background: #fff;
  border-top: 1px solid var(--ng-border);
  padding: 56px 0 30px;
  margin-top: 20px;
}
.footer-brand {
  font-size: 24px;
  font-weight: 800;
  color: var(--ng-dark);
  margin-bottom: 12px;
}
.footer-brand span { color: var(--ng-primary); }
.footer-desc {
  font-size: 14px;
  color: var(--ng-gray);
  max-width: 360px;
  line-height: 1.8;
  margin-bottom: 18px;
}
.social-links { display: flex; gap: 10px; }
.social-links a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--ng-bg);
  color: var(--ng-gray);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--ng-transition);
  font-size: 17px;
}
.social-links a:hover {
  background: var(--ng-primary);
  color: #fff;
  transform: translateY(-2px);
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ng-dark);
  margin-bottom: 14px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li { margin-bottom: 8px; }
.footer-links a {
  font-size: 14px;
  color: var(--ng-gray);
  transition: var(--ng-transition);
}
.footer-links a:hover { color: var(--ng-primary); padding-left: 3px; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  margin-top: 36px;
  border-top: 1px solid var(--ng-border);
  font-size: 13px;
  color: var(--ng-gray);
}
.footer-bottom a { color: var(--ng-gray); }
.footer-bottom a:hover { color: var(--ng-primary); }

/* Responsive */
@media (max-width: 991px) {
  .ng-header .navbar { border-radius: 32px; padding: 8px 14px; }
  .navbar-collapse { margin-top: 10px; padding: 10px 0; }
  .navbar-nav { gap: 2px; }
  .ng-nav-cta { margin-top: 8px; text-align: center; display: block; }
  .ng-page-head h1 { font-size: 27px; }
  .ng-cta-box { padding: 36px 28px; }
  .ng-section { padding: 56px 0; }
}
@media (max-width: 767px) {
  body { font-size: 15px; }
  .ng-page-head { padding-top: 130px; }
  .ng-page-head h1 { font-size: 23px; letter-spacing: 0.3px; }
  .ng-page-head .lead { font-size: 15px; }
  .ng-section-title { font-size: 20px; }
  .ng-faq-acc .accordion-button { font-size: 14px; padding: 14px 16px; }
  .ng-faq-acc .accordion-body { padding: 14px 16px 18px; font-size: 14px; }
  .ng-cta-box h2 { font-size: 20px; }
  .ng-cta-box p { font-size: 14px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .ng-page-head h1 { font-size: 20px; }
  .ng-breadcrumb { font-size: 13px; }
  .ng-cta-box { padding: 28px 20px; }
  .ng-feature-card img { height: 120px; }
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}