/* roulang page: index */
:root {
            --primary: #4A90D9;
            --primary-dark: #3B7DD8;
            --primary-light: #6AABF0;
            --secondary: #F5A623;
            --secondary-dark: #E5951A;
            --bg-light: #F7F9FC;
            --bg-white: #FFFFFF;
            --text-dark: #333333;
            --text-muted: #999999;
            --text-light: #666666;
            --border-color: #E8ECF1;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 4px 20px rgba(0,0,0,0.12);
            --shadow-nav: 0 1px 5px rgba(0,0,0,0.06);
            --transition: 0.2s ease;
            --font-cn: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-en: 'Inter', sans-serif;
            --container-max: 1140px;
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-cn);
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            margin: 0;
            padding: 0;
        }
        h1, h2, h3, h4, h5, h6 { font-family: var(--font-en), var(--font-cn); font-weight: 700; line-height: 1.3; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: var(--container-max); padding-left: 15px; padding-right: 15px; margin: 0 auto; }
        .section-padding { padding: 80px 0; }
        .section-padding-sm { padding: 60px 0; }
        .text-muted { color: var(--text-muted) !important; }
        .text-light { color: var(--text-light) !important; }
        .bg-white { background: var(--bg-white); }
        .bg-light { background: var(--bg-light); }
        .bg-primary { background: var(--primary) !important; }
        .bg-secondary { background: var(--secondary) !important; }
        .rounded-custom { border-radius: var(--radius-md); }
        .shadow-custom { box-shadow: var(--shadow-sm); }
        .shadow-custom-hover:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
        .transition-all { transition: all var(--transition); }

        /* ===== Navigation ===== */
        .navbar-custom {
            background: var(--bg-white);
            box-shadow: var(--shadow-nav);
            height: 60px;
            padding: 0 1rem;
            position: sticky;
            top: 0;
            z-index: 1050;
        }
        .navbar-custom .navbar-brand {
            font-family: var(--font-en), var(--font-cn);
            font-weight: 800;
            font-size: 20px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 6px;
            letter-spacing: 0.5px;
        }
        .navbar-custom .navbar-brand .brand-sub {
            font-weight: 400;
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.3px;
            margin-left: 2px;
        }
        .navbar-custom .navbar-brand i {
            font-size: 24px;
            color: var(--secondary);
        }
        .navbar-custom .nav-link {
            font-family: var(--font-cn);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 0.5rem 1rem !important;
            border-bottom: 3px solid transparent;
            transition: var(--transition);
            position: relative;
        }
        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link:focus {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .navbar-custom .nav-link.active {
            color: var(--primary) !important;
            border-bottom-color: var(--primary);
        }
        .navbar-custom .search-box {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            background: var(--bg-light);
            padding: 6px 16px;
            font-size: 14px;
            width: 180px;
            transition: var(--transition);
            font-family: var(--font-cn);
        }
        .navbar-custom .search-box:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74,144,217,0.15);
        }
        .navbar-custom .btn-cta-nav {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 8px 20px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            font-family: var(--font-cn);
        }
        .navbar-custom .btn-cta-nav:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 12px rgba(74,144,217,0.3);
            color: #fff;
        }
        .navbar-custom .navbar-toggler {
            border: none;
            font-size: 22px;
            color: var(--text-dark);
            padding: 4px 8px;
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: none;
        }
        @media (max-width: 991px) {
            .navbar-custom .navbar-collapse {
                background: var(--bg-white);
                padding: 1rem;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                box-shadow: var(--shadow-sm);
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                z-index: 1040;
            }
            .navbar-custom .nav-link {
                border-bottom: none;
                padding: 10px 0 !important;
                border-left: 3px solid transparent;
                padding-left: 12px !important;
            }
            .navbar-custom .nav-link.active,
            .navbar-custom .nav-link:hover {
                border-left-color: var(--primary);
                border-bottom-color: transparent;
                background: rgba(74,144,217,0.05);
            }
            .navbar-custom .search-box { width: 100%; margin: 8px 0; }
            .navbar-custom .btn-cta-nav { width: 100%; text-align: center; }
            .navbar-custom .navbar-nav { flex-direction: column; }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #1a2a4a 0%, #2c3e6a 50%, #1a2a4a 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-section .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,42,74,0.85) 0%, rgba(44,62,106,0.75) 100%);
            z-index: 1;
        }
        .hero-section .container { position: relative; z-index: 2; padding: 60px 15px; }
        .hero-section .hero-title {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        .hero-section .hero-subtitle {
            font-size: 20px;
            font-weight: 400;
            color: rgba(255,255,255,0.85);
            margin-bottom: 28px;
            max-width: 600px;
        }
        .hero-section .hero-btn-group { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
        .hero-section .btn-hero-primary {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 40px;
            font-size: 18px;
            font-weight: 700;
            transition: var(--transition);
            font-family: var(--font-cn);
        }
        .hero-section .btn-hero-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(74,144,217,0.35);
            color: #fff;
        }
        .hero-section .hero-proof {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-top: 4px;
        }
        .hero-section .hero-proof i { color: var(--secondary); margin-right: 4px; }
        @media (max-width: 768px) {
            .hero-section { min-height: 380px; }
            .hero-section .hero-title { font-size: 28px; }
            .hero-section .hero-subtitle { font-size: 17px; }
            .hero-section .btn-hero-primary { width: 100%; text-align: center; }
            .hero-section .hero-btn-group { flex-direction: column; }
        }

        /* ===== Section Titles ===== */
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-light);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 40px;
        }
        .section-title-left { text-align: left; }
        .section-subtitle-left { text-align: left; margin-left: 0; }

        /* ===== Feature Carousel ===== */
        .feature-carousel-wrap {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .feature-carousel-wrap .carousel-item {
            padding: 30px 20px;
        }
        .feature-carousel-wrap .carousel-item .row { align-items: center; }
        .feature-carousel-wrap .carousel-img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-light);
        }
        .feature-carousel-wrap .carousel-text {
            padding: 20px;
        }
        .feature-carousel-wrap .carousel-text h4 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .feature-carousel-wrap .carousel-text p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .feature-carousel-wrap .carousel-control-prev,
        .feature-carousel-wrap .carousel-control-next {
            width: 44px;
            height: 44px;
            background: var(--primary);
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
            opacity: 0.85;
        }
        .feature-carousel-wrap .carousel-control-prev { left: 10px; }
        .feature-carousel-wrap .carousel-control-next { right: 10px; }
        .feature-carousel-wrap .carousel-indicators { bottom: -10px; }
        .feature-carousel-wrap .carousel-indicators button {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--text-muted);
            border: none;
            margin: 0 4px;
        }
        .feature-carousel-wrap .carousel-indicators button.active { background: var(--primary); }
        @media (max-width: 768px) {
            .feature-carousel-wrap .carousel-item .row { flex-direction: column; }
            .feature-carousel-wrap .carousel-text { padding: 16px 0; }
        }

        /* ===== System Requirements ===== */
        .sys-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-color);
        }
        .sys-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .sys-card .sys-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .sys-card h5 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .sys-card p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 4px;
        }
        .sys-card .sys-tag {
            display: inline-block;
            background: rgba(74,144,217,0.1);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 20px;
            margin-top: 6px;
        }

        /* ===== Testimonials ===== */
        .testimonial-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-color);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .testimonial-card .testi-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .testimonial-card .testi-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
        }
        .testimonial-card .testi-date {
            font-size: 12px;
            color: var(--text-muted);
        }
        .testimonial-card .testi-stars {
            color: var(--secondary);
            font-size: 14px;
            letter-spacing: 1px;
        }
        .testimonial-card .testi-text {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-top: 10px;
            font-style: italic;
        }

        /* ===== Download Buttons ===== */
        .download-section {
            background: linear-gradient(135deg, #2c3e6a 0%, #1a2a4a 100%);
            color: #fff;
        }
        .download-section .section-title { color: #fff; }
        .download-section .section-subtitle { color: rgba(255,255,255,0.75); }
        .btn-download-android {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 44px;
            font-size: 17px;
            font-weight: 700;
            transition: var(--transition);
            font-family: var(--font-cn);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-download-android:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(74,144,217,0.35);
            color: #fff;
        }
        .btn-download-ios {
            background: var(--secondary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 44px;
            font-size: 17px;
            font-weight: 700;
            transition: var(--transition);
            font-family: var(--font-cn);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-download-ios:hover {
            background: var(--secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245,166,35,0.35);
            color: #fff;
        }
        .download-note {
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            margin-top: 12px;
        }

        /* ===== News / CMS List ===== */
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: row;
            margin-bottom: 16px;
            border: 1px solid var(--border-color);
        }
        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .news-card .news-img-wrap {
            width: 180px;
            min-height: 120px;
            flex-shrink: 0;
            background: var(--bg-light);
            overflow: hidden;
        }
        .news-card .news-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-card .news-body {
            padding: 16px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .news-card .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-title a { color: inherit; }
        .news-card .news-title a:hover { color: var(--primary); }
        .news-card .news-summary {
            font-size: 14px;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }
        .news-card .news-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            align-items: center;
        }
        .news-card .news-meta .badge-cat {
            background: rgba(74,144,217,0.12);
            color: var(--primary);
            font-weight: 600;
            font-size: 12px;
            padding: 2px 12px;
            border-radius: 20px;
        }
        .news-card .news-meta i { margin-right: 4px; }
        .news-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
        }
        .news-empty i { font-size: 48px; margin-bottom: 12px; color: var(--border-color); }
        .news-empty p { font-size: 16px; }
        @media (max-width: 768px) {
            .news-card { flex-direction: column; }
            .news-card .news-img-wrap { width: 100%; height: 160px; }
            .news-card .news-body { padding: 14px 16px; }
        }

        /* ===== FAQ Accordion ===== */
        .faq-section .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .faq-section .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
            background: var(--bg-white);
            padding: 16px 20px;
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: rgba(74,144,217,0.05);
            color: var(--primary);
        }
        .faq-section .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }
        .faq-section .accordion-button::after {
            background-size: 16px;
        }
        .faq-section .accordion-body {
            padding: 12px 20px 18px;
            font-size: 14px;
            color: var(--text-light);
            background: var(--bg-white);
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 60px 0;
        }
        .cta-section .cta-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section .cta-desc {
            font-size: 16px;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 24px;
        }
        .cta-section .btn-cta-white {
            background: #fff;
            color: var(--primary);
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 44px;
            font-size: 17px;
            font-weight: 700;
            transition: var(--transition);
            font-family: var(--font-cn);
        }
        .cta-section .btn-cta-white:hover {
            background: var(--bg-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
            color: var(--primary-dark);
        }

        /* ===== Footer ===== */
        .footer {
            background: #2C3E50;
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer h5 {
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary-light);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer .footer-logo i { color: var(--secondary); }
        .footer .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer .footer-links li { margin-bottom: 8px; }
        .footer .footer-links a {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer .social-icons {
            display: flex;
            gap: 12px;
            margin-top: 10px;
        }
        .footer .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.1);
            color: rgba(255,255,255,0.7);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer .social-icons a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }
        .footer .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer .footer-bottom a:hover { color: var(--primary-light); }
        @media (max-width: 768px) {
            .footer .row > div { margin-bottom: 30px; }
            .footer .footer-desc { max-width: 100%; }
            .section-padding { padding: 50px 0; }
            .section-padding-sm { padding: 36px 0; }
            .section-title { font-size: 22px; }
            .section-subtitle { font-size: 15px; margin-bottom: 28px; }
        }

        /* ===== Misc ===== */
        .badge-primary-light {
            background: rgba(74,144,217,0.12);
            color: var(--primary);
            font-weight: 600;
            font-size: 12px;
            padding: 3px 14px;
            border-radius: 20px;
        }
        .btn-outline-primary-custom {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
            border-radius: var(--radius-sm);
            padding: 10px 28px;
            font-weight: 600;
            transition: var(--transition);
            font-family: var(--font-cn);
        }
        .btn-outline-primary-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .divider-custom {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 16px;
        }
        .divider-custom-left { margin: 0 0 16px; }

/* roulang page: article */
:root {
            --primary: #4A90D9;
            --primary-dark: #3B7DD8;
            --primary-light: #e8f0fe;
            --accent: #F5A623;
            --accent-dark: #E5951A;
            --bg-light: #F7F9FC;
            --bg-white: #FFFFFF;
            --text-dark: #333333;
            --text-muted: #999999;
            --text-light: #666666;
            --border-color: #e9ecef;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 2px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 4px 20px rgba(0,0,0,0.12);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
            --transition: 0.2s ease;
            --font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-width: 1140px;
            --header-height: 60px;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body { font-family: var(--font-family); font-size: 16px; line-height: 1.7; color: var(--text-dark); background: var(--bg-light); -webkit-font-smoothing: antialiased; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        .container { max-width: var(--container-width); padding-left: 15px; padding-right: 15px; margin: 0 auto; width: 100%; }

        /* Navigation */
        .navbar-custom { background: var(--bg-white); box-shadow: 0 1px 5px rgba(0,0,0,0.06); height: var(--header-height); padding: 0 0; }
        .navbar-custom .container { height: 100%; }
        .navbar-brand { font-size: 22px; font-weight: 700; color: var(--text-dark) !important; display: flex; align-items: center; gap: 8px; letter-spacing: -0.3px; }
        .navbar-brand i { color: var(--primary); font-size: 26px; }
        .navbar-brand .brand-sub { font-size: 13px; font-weight: 400; color: var(--text-muted); letter-spacing: 0.3px; }
        .navbar-custom .navbar-nav { gap: 4px; }
        .navbar-custom .nav-link { font-size: 15px; font-weight: 500; color: var(--text-light) !important; padding: 8px 16px !important; border-radius: var(--radius-sm); transition: all var(--transition); }
        .navbar-custom .nav-link:hover { color: var(--primary) !important; background: var(--primary-light); }
        .navbar-custom .nav-link.active { color: var(--primary) !important; background: var(--primary-light); font-weight: 600; position: relative; }
        .navbar-custom .nav-link.active::after { content: ''; position: absolute; bottom: 0; left: 16px; right: 16px; height: 3px; background: var(--primary); border-radius: 2px; }
        .search-box { border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 6px 18px; font-size: 14px; background: var(--bg-light); color: var(--text-dark); outline: none; width: 160px; transition: all var(--transition); }
        .search-box:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(74,144,217,0.12); width: 200px; }
        .search-box::placeholder { color: var(--text-muted); }
        .btn-cta-nav { background: var(--primary); color: #fff !important; border: none; border-radius: var(--radius-sm); padding: 7px 24px; font-weight: 600; font-size: 14px; transition: all var(--transition); box-shadow: var(--shadow-sm); }
        .btn-cta-nav:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); color: #fff !important; }
        .navbar-toggler { border: none; color: var(--text-dark); font-size: 22px; padding: 4px 8px; }
        .navbar-toggler:focus { box-shadow: none; }

        /* Breadcrumb */
        .breadcrumb-wrap { background: var(--bg-white); border-bottom: 1px solid var(--border-color); padding: 12px 0; }
        .breadcrumb-custom { font-size: 14px; color: var(--text-muted); display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
        .breadcrumb-custom a { color: var(--text-muted); }
        .breadcrumb-custom a:hover { color: var(--primary); }
        .breadcrumb-custom .sep { color: #ccc; font-size: 12px; }
        .breadcrumb-custom .current { color: var(--text-dark); font-weight: 500; }

        /* Article Header */
        .article-header { background: var(--bg-white); padding: 40px 0 30px; border-bottom: 1px solid var(--border-color); }
        .article-header .article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; font-size: 14px; color: var(--text-muted); margin-top: 16px; }
        .article-header .article-meta i { margin-right: 5px; color: var(--primary); }
        .article-header .article-meta span { display: inline-flex; align-items: center; }
        .article-header .category-badge { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 3px 14px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 500; }
        .article-title { font-size: 32px; font-weight: 700; line-height: 1.3; color: var(--text-dark); margin-bottom: 0; }

        /* Article Body */
        .article-body-wrap { padding: 40px 0 60px; }
        .article-content { background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); padding: 40px 48px; font-size: 17px; line-height: 1.85; color: var(--text-dark); }
        .article-content h2 { font-size: 24px; font-weight: 700; margin-top: 36px; margin-bottom: 16px; color: var(--text-dark); border-left: 4px solid var(--primary); padding-left: 16px; }
        .article-content h3 { font-size: 20px; font-weight: 600; margin-top: 28px; margin-bottom: 12px; color: var(--text-dark); }
        .article-content p { margin-bottom: 18px; }
        .article-content ul, .article-content ol { margin-bottom: 18px; padding-left: 24px; list-style: disc; }
        .article-content li { margin-bottom: 6px; }
        .article-content img { border-radius: var(--radius-sm); margin: 20px 0; box-shadow: var(--shadow-sm); }
        .article-content blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 16px 20px; margin: 20px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-light); font-style: italic; }
        .article-content a { color: var(--primary); font-weight: 500; text-decoration: underline; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content .wp-caption { max-width: 100%; margin: 20px 0; }
        .article-content .wp-caption-text { font-size: 14px; color: var(--text-muted); text-align: center; padding-top: 8px; }

        /* Related Posts */
        .related-wrap { margin-top: 40px; }
        .related-wrap h3 { font-size: 22px; font-weight: 700; margin-bottom: 20px; position: relative; padding-left: 16px; border-left: 4px solid var(--primary); }
        .related-card { background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); padding: 20px; transition: all var(--transition); height: 100%; display: flex; flex-direction: column; }
        .related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
        .related-card .card-img { width: 100%; height: 140px; object-fit: cover; border-radius: var(--radius-sm); margin-bottom: 12px; }
        .related-card .card-title { font-size: 16px; font-weight: 600; color: var(--text-dark); line-height: 1.4; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-title:hover { color: var(--primary); }
        .related-card .card-meta { font-size: 13px; color: var(--text-muted); margin-top: auto; padding-top: 8px; border-top: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .related-card .card-cat { background: var(--primary-light); color: var(--primary); padding: 2px 12px; border-radius: 12px; font-size: 12px; font-weight: 500; }

        /* Not Found */
        .not-found-wrap { text-align: center; padding: 80px 20px; background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
        .not-found-wrap i { font-size: 48px; color: var(--text-muted); margin-bottom: 20px; display: block; }
        .not-found-wrap h4 { font-size: 22px; color: var(--text-dark); margin-bottom: 12px; }
        .not-found-wrap p { color: var(--text-muted); margin-bottom: 20px; }
        .not-found-wrap .btn-back { background: var(--primary); color: #fff; border: none; border-radius: var(--radius-sm); padding: 10px 30px; font-weight: 600; transition: all var(--transition); }
        .not-found-wrap .btn-back:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }

        /* Footer */
        .footer { background: #2C3E50; color: rgba(255,255,255,0.85); padding: 50px 0 0; margin-top: 0; }
        .footer h5 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; position: relative; padding-bottom: 8px; border-bottom: 2px solid rgba(255,255,255,0.1); }
        .footer a { color: rgba(255,255,255,0.65); transition: all var(--transition); font-size: 14px; }
        .footer a:hover { color: var(--primary); padding-left: 3px; }
        .footer-logo { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
        .footer-logo i { color: var(--primary); font-size: 26px; }
        .footer-desc { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); margin-bottom: 18px; max-width: 360px; }
        .footer-links li { margin-bottom: 8px; }
        .footer-links li a { display: inline-flex; align-items: center; gap: 6px; }
        .social-icons { display: flex; gap: 12px; }
        .social-icons a { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.7); font-size: 16px; transition: all var(--transition); }
        .social-icons a:hover { background: var(--primary); color: #fff; padding-left: 0; transform: translateY(-2px); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 18px 0; margin-top: 40px; text-align: center; font-size: 13px; color: rgba(255,255,255,0.4); }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary); }

        /* Responsive */
        @media (max-width: 991px) {
            .navbar-custom { height: auto; min-height: 60px; }
            .navbar-custom .container { padding-top: 8px; padding-bottom: 8px; }
            .navbar-custom .navbar-nav { gap: 0; padding: 10px 0; }
            .navbar-custom .nav-link { padding: 8px 12px !important; font-size: 15px; }
            .navbar-custom .nav-link.active::after { display: none; }
            .search-box { width: 100%; margin-bottom: 8px; }
            .btn-cta-nav { width: 100%; text-align: center; }
            .article-title { font-size: 26px; }
            .article-content { padding: 24px 20px; font-size: 16px; }
            .article-content h2 { font-size: 21px; }
            .article-content h3 { font-size: 18px; }
            .footer .col-lg-4, .footer .col-lg-2, .footer .col-lg-3 { margin-bottom: 30px; }
        }

        @media (max-width: 767px) {
            .article-title { font-size: 22px; }
            .article-header { padding: 24px 0 20px; }
            .article-header .article-meta { gap: 12px; font-size: 13px; }
            .article-body-wrap { padding: 24px 0 40px; }
            .article-content { padding: 16px 14px; font-size: 15px; }
            .article-content h2 { font-size: 19px; margin-top: 24px; }
            .article-content h3 { font-size: 17px; margin-top: 20px; }
            .breadcrumb-wrap { padding: 8px 0; }
            .breadcrumb-custom { font-size: 13px; }
            .related-card .card-img { height: 110px; }
            .footer { padding: 30px 0 0; }
            .footer-bottom { margin-top: 20px; }
        }

        @media (max-width: 520px) {
            .article-title { font-size: 20px; }
            .article-header .article-meta { gap: 8px; flex-direction: column; align-items: flex-start; }
            .article-content { padding: 12px 10px; font-size: 14px; }
            .article-content h2 { font-size: 17px; padding-left: 12px; }
            .article-content h3 { font-size: 16px; }
            .related-card .card-img { height: 90px; }
            .related-card { padding: 14px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #4A90D9;
            --primary-dark: #3B7DD8;
            --primary-light: #6AABF0;
            --secondary: #F5A623;
            --secondary-dark: #E5951A;
            --bg-light: #F7F9FC;
            --bg-white: #FFFFFF;
            --text-dark: #333333;
            --text-gray: #666666;
            --text-light: #999999;
            --border-color: #E8ECF1;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 1px 5px rgba(0, 0, 0, 0.06);
            --font-family: "PingFang SC", "Microsoft YaHei", "Inter", sans-serif;
            --transition: 0.2s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul {
            padding-left: 0;
            list-style: none;
            margin-bottom: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-dark);
        }
        .container {
            max-width: 1140px;
            padding-left: 15px;
            padding-right: 15px;
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: var(--bg-white);
            box-shadow: var(--shadow-nav);
            height: 60px;
            padding: 0 1rem;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .navbar-custom .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 20px;
            color: var(--primary);
            white-space: nowrap;
        }
        .navbar-custom .navbar-brand i {
            font-size: 24px;
            color: var(--secondary);
        }
        .navbar-custom .brand-sub {
            font-weight: 400;
            font-size: 13px;
            color: var(--text-light);
            margin-left: 2px;
        }
        .navbar-custom .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 0.5rem 1rem;
            border-bottom: 3px solid transparent;
            transition: var(--transition);
            position: relative;
        }
        .navbar-custom .navbar-nav .nav-link:hover,
        .navbar-custom .navbar-nav .nav-link:focus {
            color: var(--primary);
        }
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .navbar-custom .navbar-toggler {
            border: none;
            color: var(--text-dark);
            font-size: 22px;
            padding: 0;
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: none;
        }
        .search-box {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 8px 18px;
            font-size: 14px;
            width: 180px;
            transition: var(--transition);
            outline: none;
        }
        .search-box:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
        }
        .btn-cta-nav {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 8px 22px;
            font-weight: 600;
            font-size: 14px;
            border: none;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-cta-nav:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }

        /* ===== Hero ===== */
        .hero-category {
            background: linear-gradient(135deg, #2C3E50 0%, #1a2a3a 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
            padding: 60px 0;
        }
        .hero-category::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 1;
        }
        .hero-category .container {
            position: relative;
            z-index: 2;
        }
        .hero-category h1 {
            font-size: 40px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .hero-category .hero-sub {
            font-size: 20px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .hero-category .hero-search-wrap {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            max-width: 520px;
        }
        .hero-category .hero-search-wrap input {
            flex: 1;
            min-width: 200px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-lg);
            padding: 12px 20px;
            font-size: 15px;
            color: #fff;
            outline: none;
            backdrop-filter: blur(4px);
        }
        .hero-category .hero-search-wrap input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .hero-category .hero-search-wrap input:focus {
            border-color: var(--secondary);
            background: rgba(255, 255, 255, 0.22);
        }
        .hero-category .hero-search-wrap .btn-hero-search {
            background: var(--secondary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .hero-category .hero-search-wrap .btn-hero-search:hover {
            background: var(--secondary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.35);
        }

        /* ===== 板块通用 ===== */
        .section-pad {
            padding: 80px 0;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            color: var(--text-dark);
        }
        .section-sub {
            font-size: 16px;
            color: var(--text-gray);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .bg-white-block {
            background: var(--bg-white);
        }
        .bg-light-block {
            background: var(--bg-light);
        }

        /* ===== 攻略分类标签 ===== */
        .guide-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-bottom: 40px;
        }
        .guide-tags .tag {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 8px 22px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            transition: var(--transition);
            cursor: default;
        }
        .guide-tags .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .guide-tags .tag.active-tag {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 攻略卡片 ===== */
        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .guide-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .guide-card .card-body {
            padding: 20px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-badge {
            display: inline-block;
            background: rgba(74, 144, 217, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .guide-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .guide-card .card-desc {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .guide-card .card-meta {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 16px;
            border-top: 1px solid var(--border-color);
            padding-top: 12px;
        }
        .guide-card .card-meta i {
            margin-right: 4px;
        }

        /* ===== 特色卖点 ===== */
        .feature-grid .feature-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
        }
        .feature-grid .feature-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .feature-grid .feature-icon {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 18px;
            display: block;
        }
        .feature-grid .feature-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-grid .feature-item p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 流程步骤 ===== */
        .steps-wrap {
            counter-reset: step-counter;
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
        }
        .step-item {
            flex: 1 1 200px;
            max-width: 240px;
            text-align: center;
            position: relative;
            padding-top: 50px;
        }
        .step-item::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(74, 144, 217, 0.25);
        }
        .step-item h5 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== 用户评价 ===== */
        .review-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px 24px 28px;
            height: 100%;
            transition: var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .review-card .review-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 14px;
        }
        .review-card .review-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .review-card .review-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
        }
        .review-card .review-stars {
            color: var(--secondary);
            font-size: 14px;
            letter-spacing: 2px;
        }
        .review-card .review-text {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.7;
            margin-bottom: 10px;
        }
        .review-card .review-date {
            font-size: 12px;
            color: var(--text-light);
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-custom .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            overflow: hidden;
            margin-bottom: 12px;
            background: var(--bg-white);
        }
        .faq-custom .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            background: var(--bg-white);
            padding: 18px 24px;
            box-shadow: none;
            border: none;
        }
        .faq-custom .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23333'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: var(--transition);
        }
        .faq-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(-180deg);
        }
        .faq-custom .accordion-button:not(.collapsed) {
            background: var(--bg-light);
            color: var(--primary);
        }
        .faq-custom .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }
        .faq-custom .accordion-body {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-gray);
            line-height: 1.7;
            background: var(--bg-white);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #4A90D9 0%, #3B7DD8 100%);
            padding: 64px 0;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta-big {
            background: var(--secondary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 44px;
            font-size: 18px;
            font-weight: 700;
            transition: var(--transition);
            display: inline-block;
        }
        .cta-section .btn-cta-big:hover {
            background: var(--secondary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.4);
        }
        .cta-section .cta-note {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 16px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #2C3E50;
            padding: 60px 0 0;
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-logo i {
            color: var(--secondary);
            font-size: 26px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            margin-bottom: 20px;
        }
        .social-icons {
            display: flex;
            gap: 14px;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer h5 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 分隔线 ===== */
        .divider-custom {
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
            margin: 0 auto 10px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .navbar-custom .navbar-collapse {
                background: var(--bg-white);
                padding: 16px 20px;
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-hover);
                margin-top: 8px;
            }
            .navbar-custom .navbar-nav .nav-link {
                border-bottom: none;
                padding: 10px 0;
            }
            .navbar-custom .navbar-nav .nav-link.active {
                border-bottom: none;
                background: rgba(74, 144, 217, 0.08);
                border-radius: var(--radius-sm);
                padding-left: 12px;
            }
            .search-box {
                width: 100%;
            }
            .btn-cta-nav {
                width: 100%;
                text-align: center;
            }
            .hero-category h1 {
                font-size: 30px;
            }
            .hero-category .hero-sub {
                font-size: 17px;
            }
            .section-pad {
                padding: 50px 0;
            }
            .section-title {
                font-size: 24px;
            }
        }
        @media (max-width: 767px) {
            .hero-category {
                min-height: 300px;
                padding: 40px 0;
            }
            .hero-category h1 {
                font-size: 26px;
            }
            .hero-category .hero-sub {
                font-size: 15px;
                margin-bottom: 20px;
            }
            .hero-category .hero-search-wrap input {
                min-width: 140px;
                font-size: 14px;
                padding: 10px 16px;
            }
            .hero-category .hero-search-wrap .btn-hero-search {
                padding: 10px 20px;
                font-size: 14px;
            }
            .section-pad {
                padding: 40px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 32px;
            }
            .guide-card .card-body {
                padding: 16px 16px 20px;
            }
            .guide-card .card-title {
                font-size: 16px;
            }
            .step-item {
                flex: 1 1 100%;
                max-width: 100%;
                padding-top: 44px;
            }
            .step-item::before {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-section .btn-cta-big {
                padding: 12px 32px;
                font-size: 16px;
            }
            .footer {
                padding: 40px 0 0;
            }
            .footer .col-6 {
                margin-bottom: 24px;
            }
        }
        @media (max-width: 520px) {
            .hero-category h1 {
                font-size: 22px;
            }
            .hero-category .hero-sub {
                font-size: 14px;
            }
            .hero-category .hero-search-wrap {
                flex-direction: column;
            }
            .hero-category .hero-search-wrap input {
                width: 100%;
            }
            .guide-tags .tag {
                font-size: 13px;
                padding: 6px 16px;
            }
            .review-card {
                padding: 18px 18px 22px;
            }
        }

        /* ===== 辅助 ===== */
        .mt-40 {
            margin-top: 40px;
        }
        .mb-40 {
            margin-bottom: 40px;
        }
        .gap-16 {
            gap: 16px;
        }
        .gap-20 {
            gap: 20px;
        }
        .text-center {
            text-align: center;
        }
        .fade-in {
            animation: fadeUp 0.6s ease forwards;
        }
        @keyframes fadeUp {
            0% {
                opacity: 0;
                transform: translateY(20px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

/* roulang page: category2 */
/* ===== CSS Variables / Design System ===== */
        :root {
            --primary: #4A90D9;
            --primary-dark: #3B7DD8;
            --primary-light: #6AADE6;
            --accent: #F5A623;
            --accent-dark: #E5951A;
            --bg-light: #F7F9FC;
            --bg-white: #FFFFFF;
            --text-dark: #333333;
            --text-gray: #666666;
            --text-light: #999999;
            --border-color: #E8ECF1;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);
            --radius-btn: 6px;
            --radius-card: 12px;
            --radius-input: 20px;
            --transition: 0.2s ease;
            --font-ch: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-en: 'Inter', sans-serif;
            --nav-height: 60px;
            --footer-bg: #2C3E50;
        }

        /* ===== Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-ch);
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        ul {
            list-style: none;
            padding-left: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1140px;
            padding-left: 15px;
            padding-right: 15px;
        }

        /* ===== Navbar ===== */
        .navbar-custom {
            background: var(--bg-white);
            box-shadow: 0 1px 5px rgba(0, 0, 0, 0.06);
            height: var(--nav-height);
            padding: 0 1rem;
            position: sticky;
            top: 0;
            z-index: 999;
        }
        .navbar-custom .navbar-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.5px;
        }
        .navbar-custom .navbar-brand i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .navbar-custom .brand-sub {
            font-weight: 400;
            font-size: 0.75rem;
            color: var(--text-light);
            margin-left: 2px;
        }
        .navbar-custom .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 0.5rem 1rem !important;
            border-bottom: 3px solid transparent;
            transition: border-color var(--transition), color var(--transition);
        }
        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link:focus {
            color: var(--primary);
            border-bottom-color: var(--primary-light);
        }
        .navbar-custom .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .navbar-custom .navbar-toggler {
            border: none;
            font-size: 1.4rem;
            color: var(--text-dark);
            padding: 0;
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: none;
        }
        .search-box {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-input);
            padding: 6px 16px;
            font-size: 14px;
            width: 180px;
            transition: border-color var(--transition), box-shadow var(--transition);
            background: var(--bg-light);
        }
        .search-box:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
        }
        .search-box::placeholder {
            color: var(--text-light);
            font-size: 13px;
        }
        .btn-cta-nav {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 6px 20px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            transition: background var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }
        .btn-cta-nav:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 12px rgba(74, 144, 217, 0.35);
        }
        .btn-cta-nav:focus {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, #1a2a4a 0%, #2c3e6b 50%, #1a2a4a 100%);
            overflow: hidden;
            padding: 60px 20px;
        }
        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .hero-section .hero-overlay {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 1;
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-section h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            margin-bottom: 16px;
        }
        .hero-section .hero-sub {
            font-size: 1.2rem;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
            text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
        }
        .hero-section .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 30px;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .hero-section .btn-hero {
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 14px 48px;
            font-size: 1.1rem;
            font-weight: 700;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.4);
        }
        .hero-section .btn-hero:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(245, 166, 35, 0.5);
        }
        .hero-section .btn-hero:focus {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        .hero-section .hero-stats {
            margin-top: 30px;
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
        }
        .hero-section .hero-stats span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hero-section .hero-stats i {
            color: var(--accent);
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-gray);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
        }

        /* ===== Download Process ===== */
        .process-section {
            background: var(--bg-white);
        }
        .process-step {
            text-align: center;
            padding: 28px 20px;
            border-radius: var(--radius-card);
            background: var(--bg-light);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            height: 100%;
            position: relative;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .process-step .step-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
        }
        .process-step .step-num {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 2px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
        }
        .process-step h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.92rem;
            color: var(--text-gray);
            margin-bottom: 0;
        }

        /* ===== Device Support ===== */
        .device-section {
            background: var(--bg-light);
        }
        .device-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .device-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .device-card .device-icon {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .device-card h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .device-card ul {
            text-align: left;
            font-size: 0.92rem;
            color: var(--text-gray);
            padding-left: 0;
            list-style: none;
        }
        .device-card ul li {
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .device-card ul li i {
            color: var(--accent);
            font-size: 0.8rem;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-white);
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: none;
        }
        .faq-accordion .accordion-button {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            background: var(--bg-light);
            padding: 16px 24px;
            box-shadow: none;
            border: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(74, 144, 217, 0.06);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }
        .faq-accordion .accordion-button::after {
            content: "\f067";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            background: none;
            font-size: 0.9rem;
            color: var(--text-light);
            transform: rotate(0deg);
            transition: transform var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            content: "\f068";
            color: var(--primary);
            transform: rotate(0deg);
        }
        .faq-accordion .accordion-body {
            padding: 16px 24px 24px;
            font-size: 0.95rem;
            color: var(--text-gray);
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
        }

        /* ===== CTA Download ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a2a4a 0%, #2c3e6b 50%, #1a2a4a 100%);
            padding: 70px 20px;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group-cta {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .cta-section .btn-download-primary {
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 14px 40px;
            font-size: 1.05rem;
            font-weight: 700;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35);
        }
        .cta-section .btn-download-primary:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(245, 166, 35, 0.45);
        }
        .cta-section .btn-download-secondary {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.7);
            border-radius: var(--radius-btn);
            padding: 12px 38px;
            font-size: 1.05rem;
            font-weight: 600;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .cta-section .btn-download-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .cta-section .cta-note {
            margin-top: 20px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== Tips Section ===== */
        .tips-section {
            background: var(--bg-light);
        }
        .tips-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
            border-left: 4px solid var(--primary);
        }
        .tips-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .tips-card .tips-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .tips-card h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .tips-card p {
            font-size: 0.92rem;
            color: var(--text-gray);
            margin-bottom: 0;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.85);
            padding: 50px 0 30px;
            font-size: 0.92rem;
        }
        .footer .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer .footer-logo i {
            color: var(--primary-light);
        }
        .footer .footer-desc {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 320px;
        }
        .footer .social-icons {
            display: flex;
            gap: 14px;
        }
        .footer .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer .social-icons a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer h5 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer .footer-links li {
            margin-bottom: 8px;
        }
        .footer .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
            font-size: 0.9rem;
        }
        .footer .footer-links a:hover {
            color: var(--primary-light);
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 30px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Page Breadcrumb ===== */
        .page-breadcrumb {
            background: var(--bg-light);
            padding: 14px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.88rem;
            color: var(--text-light);
        }
        .page-breadcrumb a {
            color: var(--text-gray);
        }
        .page-breadcrumb a:hover {
            color: var(--primary);
        }
        .page-breadcrumb .separator {
            margin: 0 8px;
            color: var(--text-light);
        }
        .page-breadcrumb .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .navbar-custom .navbar-collapse {
                background: var(--bg-white);
                padding: 16px 20px;
                border-radius: 0 0 12px 12px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
                max-height: 80vh;
                overflow-y: auto;
            }
            .navbar-custom .nav-link {
                border-bottom: none !important;
                padding: 10px 0 !important;
                border-bottom: 1px solid var(--border-color) !important;
            }
            .navbar-custom .nav-link.active {
                color: var(--primary);
                border-bottom-color: var(--border-color) !important;
            }
            .navbar-custom .search-box {
                width: 100%;
                margin-bottom: 10px;
            }
            .navbar-custom .btn-cta-nav {
                width: 100%;
                text-align: center;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .hero-sub {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-padding {
                padding: 50px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section .btn-group-cta {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .btn-download-primary,
            .cta-section .btn-download-secondary {
                width: 100%;
                max-width: 320px;
            }
            .hero-section .hero-stats {
                gap: 20px;
                font-size: 0.85rem;
            }
            .footer .footer-logo {
                justify-content: center;
            }
            .footer .footer-desc {
                max-width: 100%;
                text-align: center;
            }
            .footer .social-icons {
                justify-content: center;
            }
            .footer h5 {
                text-align: center;
            }
            .footer .footer-links {
                text-align: center;
            }
        }

        @media (max-width: 767.98px) {
            .hero-section {
                min-height: 320px;
                padding: 40px 16px;
            }
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .hero-section .hero-sub {
                font-size: 0.92rem;
            }
            .hero-section .btn-hero {
                padding: 12px 32px;
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .process-step {
                padding: 20px 16px;
            }
            .device-card {
                padding: 24px 16px;
            }
            .tips-card {
                padding: 20px 16px;
            }
            .faq-accordion .accordion-button {
                font-size: 0.92rem;
                padding: 14px 18px;
            }
            .faq-accordion .accordion-body {
                font-size: 0.9rem;
                padding: 14px 18px 20px;
            }
            .cta-section {
                padding: 50px 16px;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .footer {
                padding: 40px 0 20px;
            }
        }

        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.4rem;
            }
            .hero-section .hero-sub {
                font-size: 0.85rem;
            }
            .hero-section .btn-hero {
                padding: 10px 24px;
                font-size: 0.92rem;
            }
            .section-title {
                font-size: 1.15rem;
            }
            .process-step .step-icon {
                width: 52px;
                height: 52px;
                font-size: 1.3rem;
            }
            .device-card .device-icon {
                font-size: 2.2rem;
            }
        }

        /* ===== Utility ===== */
        .text-primary {
            color: var(--primary) !important;
        }
        .text-accent {
            color: var(--accent) !important;
        }
        .bg-primary-light {
            background: rgba(74, 144, 217, 0.06);
        }
        .rounded-card {
            border-radius: var(--radius-card);
        }
        .shadow-card {
            box-shadow: var(--shadow-sm);
        }

/* roulang page: category3 */
:root {
            --primary: #4A90D9;
            --primary-dark: #3B7DD8;
            --primary-light: #6BA5E7;
            --accent: #F5A623;
            --accent-dark: #E5951A;
            --bg-body: #F7F9FC;
            --bg-white: #FFFFFF;
            --text-dark: #333333;
            --text-muted: #999999;
            --text-light: #666666;
            --border-light: #E8ECF1;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 4px 20px rgba(0,0,0,0.12);
            --radius-btn: 6px;
            --radius-card: 12px;
            --radius-input: 20px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', sans-serif;
            --transition-base: 0.2s ease;
        }

        * { box-sizing: border-box; }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            color: var(--text-dark);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

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

        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }

        .container { max-width: 1140px; padding-left: 15px; padding-right: 15px; margin: 0 auto; }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: var(--bg-white);
            box-shadow: 0 1px 5px rgba(0,0,0,0.06);
            padding: 0 1rem;
            height: 60px;
            display: flex;
            align-items: center;
        }
        .navbar-custom .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 20px;
            color: var(--primary);
            padding: 0;
        }
        .navbar-custom .navbar-brand i { font-size: 24px; color: var(--accent); }
        .navbar-custom .navbar-brand .brand-sub {
            font-weight: 400;
            font-size: 12px;
            color: var(--text-muted);
            margin-left: 2px;
        }
        .navbar-custom .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            padding: 18px 16px;
            border-bottom: 3px solid transparent;
            transition: all var(--transition-base);
        }
        .navbar-custom .navbar-nav .nav-link:hover,
        .navbar-custom .navbar-nav .nav-link:focus {
            color: var(--primary);
            border-bottom-color: var(--primary-light);
        }
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .navbar-custom .search-box {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-input);
            padding: 6px 16px;
            font-size: 14px;
            width: 180px;
            outline: none;
            transition: border var(--transition-base);
            background: var(--bg-body);
        }
        .navbar-custom .search-box:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74,144,217,0.12);
        }
        .navbar-custom .btn-cta-nav {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 8px 22px;
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .navbar-custom .btn-cta-nav:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow-sm);
            color: #fff;
        }
        .navbar-toggler {
            border: none;
            padding: 4px 8px;
            color: var(--text-dark);
        }
        .navbar-toggler:focus { box-shadow: none; }

        @media (max-width: 991px) {
            .navbar-custom { height: auto; min-height: 60px; }
            .navbar-custom .navbar-collapse {
                background: var(--bg-white);
                padding: 12px 0 16px;
                border-top: 1px solid var(--border-light);
                margin-top: 8px;
            }
            .navbar-custom .navbar-nav .nav-link {
                padding: 10px 16px;
                border-bottom: none;
            }
            .navbar-custom .navbar-nav .nav-link.active {
                border-bottom: none;
                background: rgba(74,144,217,0.06);
                border-radius: 8px;
            }
            .navbar-custom .search-box { width: 100%; }
            .navbar-custom .d-flex.gap-2 { width: 100%; }
            .navbar-custom .btn-cta-nav { width: 100%; text-align: center; }
        }

        @media (max-width: 576px) {
            .navbar-custom .navbar-brand { font-size: 17px; }
            .navbar-custom .navbar-brand .brand-sub { font-size: 11px; }
        }

        /* ===== Hero ===== */
        .hero-faq {
            position: relative;
            background: linear-gradient(135deg, #1a2a4a 0%, #2c3e6a 50%, #1a2a4a 100%), url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            background-blend-mode: overlay;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 60px 20px;
            color: #fff;
        }
        .hero-faq::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0,0,0,0.35);
            z-index: 1;
        }
        .hero-faq .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }
        .hero-faq h1 {
            font-size: 40px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.25);
        }
        .hero-faq .hero-sub {
            font-size: 20px;
            font-weight: 300;
            margin-bottom: 28px;
            opacity: 0.92;
            line-height: 1.6;
        }
        .hero-faq .hero-search {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .hero-faq .hero-search input {
            border: none;
            border-radius: var(--radius-input);
            padding: 12px 22px;
            font-size: 16px;
            width: 320px;
            max-width: 100%;
            outline: none;
            background: rgba(255,255,255,0.95);
            color: var(--text-dark);
        }
        .hero-faq .hero-search input:focus {
            box-shadow: 0 0 0 3px rgba(245,166,35,0.4);
        }
        .hero-faq .hero-search .btn-search-hero {
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 12px 30px;
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .hero-faq .hero-search .btn-search-hero:hover {
            background: var(--accent-dark);
            box-shadow: var(--shadow-sm);
        }

        @media (max-width: 768px) {
            .hero-faq { min-height: 300px; padding: 40px 16px; }
            .hero-faq h1 { font-size: 28px; }
            .hero-faq .hero-sub { font-size: 17px; }
            .hero-faq .hero-search input { width: 100%; }
            .hero-faq .hero-search .btn-search-hero { width: 100%; }
        }
        @media (max-width: 480px) {
            .hero-faq h1 { font-size: 24px; }
            .hero-faq .hero-sub { font-size: 15px; }
        }

        /* ===== 通用板块 ===== */
        .section-padding { padding: 80px 0; }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-light);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section-padding { padding: 50px 0; }
            .section-title { font-size: 23px; }
            .section-subtitle { font-size: 15px; margin-bottom: 32px; }
        }

        /* ===== 问题分类卡片 ===== */
        .cat-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 32px 20px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            border: 1px solid var(--border-light);
            height: 100%;
            cursor: pointer;
        }
        .cat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .cat-card .cat-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(74,144,217,0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 28px;
            color: var(--primary);
            transition: background var(--transition-base);
        }
        .cat-card:hover .cat-icon { background: rgba(74,144,217,0.18); }
        .cat-card h5 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
        .cat-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 12px; }
        .cat-card .cat-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
        }
        .cat-card .cat-link i { margin-left: 4px; font-size: 12px; }

        /* ===== FAQ 手风琴 ===== */
        .faq-section {
            background: var(--bg-white);
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: 10px;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-accordion .accordion-header {
            background: var(--bg-white);
        }
        .faq-accordion .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            background: var(--bg-white);
            padding: 18px 24px;
            box-shadow: none;
            border: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(74,144,217,0.04);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary-light);
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23333' d='M8 12L2 6h12z'/%3E%3C/svg%3E");
            transition: transform var(--transition-base);
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(-180deg);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%234A90D9' d='M8 12L2 6h12z'/%3E%3C/svg%3E");
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
            background: var(--bg-white);
        }
        .faq-accordion .accordion-body strong { color: var(--text-dark); }

        .faq-category-label {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 20px;
            background: rgba(74,144,217,0.10);
            color: var(--primary);
        }

        /* ===== 解决流程 ===== */
        .steps-section {
            background: var(--bg-body);
        }
        .step-card {
            text-align: center;
            padding: 28px 16px;
            position: relative;
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-card h5 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
        .step-card p { font-size: 14px; color: var(--text-muted); margin-bottom: 0; }
        .step-card .step-icon {
            font-size: 32px;
            color: var(--primary-light);
            margin-bottom: 12px;
        }

        @media (min-width: 768px) {
            .step-card:not(:last-child)::after {
                content: '\f054';
                font-family: 'Font Awesome 6 Free';
                font-weight: 900;
                position: absolute;
                right: -18px;
                top: 50%;
                transform: translateY(-50%);
                color: var(--border-light);
                font-size: 18px;
            }
        }

        /* ===== 评价墙 ===== */
        .review-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            height: 100%;
            transition: all var(--transition-base);
        }
        .review-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .review-card .review-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 12px;
        }
        .review-card .review-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .review-card .review-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
        }
        .review-card .review-stars {
            color: var(--accent);
            font-size: 14px;
            letter-spacing: 1px;
        }
        .review-card .review-text {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 10px;
        }
        .review-card .review-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #4A90D9 0%, #3B7DD8 100%);
            color: #fff;
            text-align: center;
            padding: 70px 20px;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            opacity: 0.92;
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-cta-download {
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 14px 48px;
            font-weight: 700;
            font-size: 18px;
            transition: all var(--transition-base);
            margin: 0 10px 12px;
            display: inline-block;
        }
        .cta-section .btn-cta-download:hover {
            background: var(--accent-dark);
            box-shadow: 0 4px 20px rgba(245,166,35,0.4);
            color: #fff;
            transform: translateY(-2px);
        }
        .cta-section .btn-cta-secondary {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.7);
            border-radius: var(--radius-btn);
            padding: 12px 44px;
            font-weight: 600;
            font-size: 18px;
            transition: all var(--transition-base);
            margin: 0 10px 12px;
            display: inline-block;
        }
        .cta-section .btn-cta-secondary:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .cta-section .cta-note {
            font-size: 14px;
            opacity: 0.75;
            margin-top: 20px;
        }

        @media (max-width: 768px) {
            .cta-section { padding: 50px 16px; }
            .cta-section h2 { font-size: 26px; }
            .cta-section p { font-size: 16px; }
            .cta-section .btn-cta-download,
            .cta-section .btn-cta-secondary { width: 100%; margin: 8px 0; }
        }

        /* ===== 页面内锚点导航 ===== */
        .faq-anchor-nav {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1020;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .faq-anchor-nav .anchor-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px 20px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .faq-anchor-nav .anchor-list a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            padding: 4px 8px;
            border-radius: 6px;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .faq-anchor-nav .anchor-list a:hover,
        .faq-anchor-nav .anchor-list a:focus {
            color: var(--primary);
            background: rgba(74,144,217,0.06);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-faq {
            background: var(--bg-body);
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-faq .breadcrumb {
            margin: 0;
            font-size: 13px;
        }
        .breadcrumb-faq .breadcrumb-item a { color: var(--text-muted); }
        .breadcrumb-faq .breadcrumb-item.active { color: var(--text-dark); }

        /* ===== 页脚 ===== */
        .footer {
            background: #2C3E50;
            color: rgba(255,255,255,0.85);
            padding: 56px 0 0;
        }
        .footer .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }
        .footer .footer-logo i { color: var(--accent); font-size: 26px; }
        .footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.65);
            margin-bottom: 20px;
        }
        .footer .social-icons {
            display: flex;
            gap: 14px;
        }
        .footer .social-icons a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.10);
            color: rgba(255,255,255,0.7);
            font-size: 18px;
            transition: all var(--transition-base);
        }
        .footer .social-icons a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer h5 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer .footer-links li { margin-bottom: 10px; }
        .footer .footer-links a {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
            transition: all var(--transition-base);
        }
        .footer .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }

        @media (max-width: 768px) {
            .footer { padding: 40px 0 0; }
            .footer .footer-logo { font-size: 19px; }
            .footer h5 { margin-top: 20px; }
        }

        /* ===== 通用工具 ===== */
        .text-primary-custom { color: var(--primary); }
        .bg-primary-light { background: rgba(74,144,217,0.06); }
        .rounded-card { border-radius: var(--radius-card); }
        .shadow-card { box-shadow: var(--shadow-sm); }

        /* 空态占位 */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
        }
        .empty-state i { font-size: 48px; margin-bottom: 16px; display: block; }
        .empty-state p { font-size: 16px; }

        /* 滚动条美化 */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-body); }
        ::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 6px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }