/* roulang page: index */
:root {
            --color-primary: #0b2b44;
            --color-primary-light: #134674;
            --color-accent: #d49b28;
            --color-accent-light: #f0c04a;
            --color-accent-dark: #b07d1a;
            --color-bg: #f5f6f8;
            --color-surface: #ffffff;
            --color-text: #1a1d22;
            --color-text-secondary: #5a5f68;
            --color-text-muted: #8b9099;
            --color-border: #e2e5ea;
            --color-border-light: #eef0f3;
            --color-success: #1e7a5c;
            --color-danger: #c0392b;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10), 0 4px 10px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.13), 0 6px 16px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 250px;
            --topbar-height: 60px;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.68;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

        a {
            color: var(--color-primary-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        button,
        .btn {
            cursor: pointer;
            transition: all var(--transition-normal);
            font-weight: 600;
            letter-spacing: 0.01em;
        }
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

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

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.32;
            color: var(--color-text);
            margin-top: 0;
        }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

        /* ============ SIDEBAR NAVIGATION (Desktop) ============ */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-primary);
            z-index: 1050;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            box-shadow: 2px 0 24px rgba(0, 0, 0, 0.18);
            transition: transform var(--transition-slow);
        }

        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
        }
        .sidebar-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #ffffff;
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            text-decoration: none;
            transition: opacity var(--transition-fast);
        }
        .sidebar-brand a:hover {
            opacity: 0.85;
            color: #ffffff;
        }
        .sidebar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--color-accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar-nav-list {
            list-style: none;
            margin: 0;
            padding: 16px 0;
            flex: 1;
        }
        .sidebar-nav-list li {
            margin: 0;
        }
        .sidebar-nav-list li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 24px;
            color: rgba(255, 255, 255, 0.78);
            font-weight: 500;
            font-size: 0.98rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            letter-spacing: 0.02em;
        }
        .sidebar-nav-list li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            border-left-color: rgba(255, 255, 255, 0.3);
        }
        .sidebar-nav-list li a.active {
            background: rgba(255, 255, 255, 0.10);
            color: #ffffff;
            border-left-color: var(--color-accent);
            font-weight: 600;
        }
        .sidebar-nav-list li a i {
            width: 20px;
            text-align: center;
            font-size: 0.95rem;
        }

        .sidebar-footer {
            padding: 18px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
        }

        /* ============ MAIN CONTENT AREA ============ */
        .main-content {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ============ MOBILE TOPBAR ============ */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--color-primary);
            z-index: 1040;
            align-items: center;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-topbar .brand-text {
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: 0.02em;
        }
        .mobile-topbar .menu-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 10px;
            margin-left: auto;
            cursor: pointer;
            border-radius: 6px;
            transition: background var(--transition-fast);
        }
        .mobile-topbar .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* Offcanvas overlay styling */
        .offcanvas-sidebar {
            background: var(--color-primary) !important;
            width: 270px !important;
        }
        .offcanvas-sidebar .offcanvas-header {
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
            padding: 20px 20px;
        }
        .offcanvas-sidebar .offcanvas-title {
            color: #fff;
            font-weight: 700;
            font-size: 1.15rem;
            letter-spacing: 0.03em;
        }
        .offcanvas-sidebar .btn-close {
            filter: invert(1) brightness(3);
            opacity: 0.8;
        }
        .offcanvas-sidebar .btn-close:hover {
            opacity: 1;
        }
        .offcanvas-sidebar .offcanvas-body {
            padding: 8px 0;
        }
        .offcanvas-sidebar .offcanvas-body a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 20px;
            color: rgba(255, 255, 255, 0.78);
            font-weight: 500;
            font-size: 0.98rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
        }
        .offcanvas-sidebar .offcanvas-body a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            border-left-color: rgba(255, 255, 255, 0.3);
        }
        .offcanvas-sidebar .offcanvas-body a.active {
            background: rgba(255, 255, 255, 0.10);
            color: #fff;
            border-left-color: var(--color-accent);
            font-weight: 600;
        }

        /* ============ HERO ============ */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, var(--color-primary) 0%, #0d3d5c 40%, #0f2d3d 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 40%;
            background-blend-mode: overlay;
            padding: 80px 48px 90px;
            color: #ffffff;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 43, 68, 0.7) 0%, rgba(11, 43, 68, 0.88) 100%);
            z-index: 0;
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 1;
            max-width: 700px;
        }
        .hero-section .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 7px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 22px;
            letter-spacing: 0.04em;
            backdrop-filter: blur(6px);
        }
        .hero-section h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
            line-height: 1.24;
        }
        .hero-section .hero-subtitle {
            font-size: 1.18rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 560px;
        }
        .hero-section .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ============ BUTTONS ============ */
        .btn-accent {
            background: var(--color-accent);
            color: #fff;
            border: none;
            padding: 13px 28px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.98rem;
            letter-spacing: 0.03em;
            box-shadow: 0 4px 16px rgba(212, 155, 40, 0.35);
            transition: all var(--transition-normal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-accent:hover {
            background: var(--color-accent-light);
            color: #fff;
            box-shadow: 0 6px 22px rgba(212, 155, 40, 0.5);
            transform: translateY(-2px);
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(212, 155, 40, 0.3);
        }

        .btn-outline-light-custom {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.55);
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.98rem;
            letter-spacing: 0.03em;
            transition: all var(--transition-normal);
        }
        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-light-custom:active {
            transform: translateY(0);
        }

        .btn-primary-custom {
            background: var(--color-primary-light);
            color: #fff;
            border: none;
            padding: 12px 26px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-normal);
        }
        .btn-primary-custom:hover {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        /* ============ SECTION SPACING ============ */
        .section-padding {
            padding: 70px 40px;
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            letter-spacing: 0.01em;
        }
        .section-header .section-subtitle {
            color: var(--color-text-secondary);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-divider {
            width: 50px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px;
            margin: 14px auto 0;
        }

        /* ============ SERVICE CARDS ============ */
        .service-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            height: 100%;
            text-align: center;
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
            border-color: transparent;
        }
        .service-card .card-icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            background: linear-gradient(135deg, rgba(212, 155, 40, 0.12) 0%, rgba(212, 155, 40, 0.06) 100%);
            color: var(--color-accent-dark);
        }
        .service-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--color-text);
        }
        .service-card p {
            color: var(--color-text-secondary);
            font-size: 0.94rem;
            line-height: 1.65;
            margin-bottom: 0;
        }
        .service-card .card-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 20px;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            width: 100%;
        }

        /* ============ STATS BAR ============ */
        .stats-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
        }
        .stat-item .stat-number span {
            color: var(--color-accent);
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            margin-top: 6px;
        }

        /* ============ CMS LIST ============ */
        .cms-list-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 22px 26px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            display: flex;
            gap: 18px;
            align-items: flex-start;
            margin-bottom: 16px;
        }
        .cms-list-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .cms-list-card .cms-thumb {
            width: 100px;
            height: 70px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-border-light);
        }
        .cms-list-card .cms-info {
            flex: 1;
            min-width: 0;
        }
        .cms-list-card .cms-info h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
            font-weight: 600;
        }
        .cms-list-card .cms-info h4 a {
            color: var(--color-text);
            transition: color var(--transition-fast);
        }
        .cms-list-card .cms-info h4 a:hover {
            color: var(--color-accent-dark);
        }
        .cms-list-card .cms-meta {
            font-size: 0.84rem;
            color: var(--color-text-muted);
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cms-list-card .cms-tag {
            display: inline-block;
            background: rgba(212, 155, 40, 0.10);
            color: var(--color-accent-dark);
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 500;
        }
        .cms-empty-state {
            text-align: center;
            padding: 50px 20px;
            color: var(--color-text-muted);
            font-size: 1rem;
        }

        /* ============ FEATURE BLOCK ============ */
        .feature-block {
            display: flex;
            align-items: center;
            gap: 50px;
            flex-wrap: wrap;
        }
        .feature-block.reverse {
            flex-direction: row-reverse;
        }
        .feature-block .feature-text {
            flex: 1 1 360px;
        }
        .feature-block .feature-text h3 {
            font-size: 1.6rem;
            margin-bottom: 14px;
        }
        .feature-block .feature-text p {
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .feature-block .feature-img {
            flex: 1 1 360px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .feature-block .feature-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4 / 3;
        }

        /* ============ STEPS ============ */
        .step-card {
            text-align: center;
            padding: 28px 20px;
            position: relative;
        }
        .step-card .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-accent);
            color: #fff;
            font-weight: 800;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(212, 155, 40, 0.35);
        }
        .step-card h4 {
            font-size: 1.08rem;
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--color-text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
        }
        .step-connector {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-border);
            font-size: 1.4rem;
            padding: 0 8px;
        }

        /* ============ FAQ ============ */
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-question {
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            color: var(--color-text);
            transition: color var(--transition-fast);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--color-primary-light);
        }
        .faq-question .faq-icon {
            transition: transform var(--transition-normal);
            color: var(--color-text-muted);
            font-size: 0.85rem;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-question[aria-expanded="true"] .faq-icon {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            font-size: 0.94rem;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }

        /* ============ CTA SECTION ============ */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #0d3d5c 100%);
            border-radius: var(--radius-xl);
            padding: 54px 44px;
            text-align: center;
            color: #fff;
            margin: 0 40px 70px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 180px;
            height: 180px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 26px;
            font-size: 1.02rem;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: #0a1f30;
            color: rgba(255, 255, 255, 0.7);
            padding: 40px 40px 28px;
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .site-footer .footer-brand {
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            letter-spacing: 0.03em;
            margin-bottom: 10px;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--color-accent-light);
        }
        .site-footer .footer-divider {
            border-color: rgba(255, 255, 255, 0.12);
            margin: 22px 0 18px;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 991.98px) {
            .sidebar-nav {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }
            .hero-section {
                padding: 56px 24px 60px;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .hero-subtitle {
                font-size: 1rem;
            }
            .section-padding {
                padding: 44px 20px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .cta-section {
                margin: 0 16px 44px;
                padding: 36px 22px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .site-footer {
                padding: 30px 20px 22px;
            }
            .feature-block {
                gap: 28px;
            }
            .feature-block .feature-text h3 {
                font-size: 1.35rem;
            }
            .cms-list-card {
                flex-direction: column;
                gap: 12px;
            }
            .cms-list-card .cms-thumb {
                width: 100%;
                height: 160px;
            }
            .stats-row {
                gap: 28px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
        }

        @media (max-width: 575.98px) {
            .hero-section {
                padding: 40px 16px 48px;
            }
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .hero-section .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-section .hero-buttons {
                flex-direction: column;
                gap: 10px;
            }
            .hero-section .hero-buttons .btn {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .section-padding {
                padding: 36px 14px;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .service-card {
                padding: 22px 16px;
            }
            .cta-section {
                margin: 0 10px 32px;
                padding: 28px 16px;
            }
            .stats-row {
                gap: 20px;
                flex-direction: column;
            }
            .stat-item .stat-number {
                font-size: 1.8rem;
            }
            .feature-block {
                flex-direction: column !important;
                gap: 20px;
            }
            .feature-block .feature-img {
                flex: 1 1 auto;
                width: 100%;
            }
            .step-connector {
                transform: rotate(90deg);
                padding: 8px 0;
            }
        }

        /* Utility */
        .text-accent {
            color: var(--color-accent) !important;
        }
        .bg-surface {
            background: var(--color-surface);
        }
        .bg-soft {
            background: #fafbfc;
        }

/* roulang page: article */
:root {
            --color-primary: #1B3A5C;
            --color-primary-light: #2a5080;
            --color-accent: #E8943A;
            --color-accent-hover: #d17d2a;
            --color-accent-light: #fef3e5;
            --color-green: #0D7B6B;
            --color-green-light: #e6f5f2;
            --color-bg: #F4F6F9;
            --color-white: #FFFFFF;
            --color-text: #1a1a2e;
            --color-text-secondary: #4a5568;
            --color-text-muted: #718096;
            --color-text-light: #a0aec0;
            --color-border: #e2e8f0;
            --color-border-light: #edf2f7;
            --color-sidebar-bg: #0B1622;
            --color-sidebar-hover: #162536;
            --color-sidebar-active: #1a3050;
            --color-sidebar-text: #b8c5d4;
            --color-sidebar-text-light: #8899aa;
            --color-danger: #e53e3e;
            --radius-xl: 16px;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 6px;
            --radius-xs: 4px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-lg: 0 4px 24px rgba(0,0,0,0.09);
            --shadow-xl: 0 8px 40px rgba(0,0,0,0.12);
            --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --sidebar-width: 260px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        /* ========== App Layout ========== */
        .app-layout {
            display: flex;
            min-height: 100vh;
            position: relative;
        }

        /* ========== Sidebar (Desktop) ========== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-sidebar-bg);
            display: flex;
            flex-direction: column;
            z-index: 1050;
            overflow-y: auto;
            overflow-x: hidden;
            border-right: 1px solid rgba(255,255,255,0.06);
            transition: transform var(--transition-base);
        }

        .sidebar-brand {
            padding: 24px 22px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .sidebar-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.22rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            transition: opacity var(--transition-fast);
        }

        .sidebar-brand a:hover {
            opacity: 0.88;
        }

        .sidebar-brand .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 14px;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-sidebar-text-light);
            padding: 14px 10px 6px;
            font-weight: 600;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-md);
            color: var(--color-sidebar-text);
            font-size: 0.94rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 0.95rem;
            opacity: 0.75;
            flex-shrink: 0;
        }

        .sidebar-nav a:hover {
            background: var(--color-sidebar-hover);
            color: #e8edf3;
        }

        .sidebar-nav a.active {
            background: var(--color-sidebar-active);
            color: #ffffff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--color-accent);
        }

        .sidebar-nav a.active i {
            opacity: 1;
            color: var(--color-accent);
        }

        .sidebar-footer {
            padding: 16px 18px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.78rem;
            color: var(--color-sidebar-text-light);
            text-align: center;
        }

        .sidebar-footer span {
            display: block;
            line-height: 1.6;
        }

        /* ========== Main Content Area ========== */
        .app-main {
            flex: 1;
            margin-left: var(--sidebar-width);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            transition: margin-left var(--transition-base);
        }

        /* ========== Mobile Header ========== */
        .mobile-header {
            display: none;
            background: #fff;
            border-bottom: 1px solid var(--color-border);
            padding: 12px 18px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 1040;
            box-shadow: var(--shadow-sm);
        }

        .mobile-header .mobile-brand {
            font-weight: 700;
            font-size: 1.08rem;
            color: var(--color-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-header .mobile-brand .brand-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-accent);
            display: inline-block;
        }

        .mobile-menu-btn {
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--color-text);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .mobile-menu-btn:hover {
            background: var(--color-bg);
        }

        /* Offcanvas */
        .offcanvas-sidebar {
            background: var(--color-sidebar-bg) !important;
            color: #fff;
            width: 280px !important;
        }

        .offcanvas-sidebar .offcanvas-header {
            border-bottom: 1px solid rgba(255,255,255,0.08);
            padding: 18px 20px;
        }

        .offcanvas-sidebar .offcanvas-title {
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .offcanvas-sidebar .btn-close {
            filter: invert(1) brightness(2);
            opacity: 0.7;
        }

        .offcanvas-sidebar .offcanvas-body {
            padding: 12px 14px;
        }

        .offcanvas-sidebar .offcanvas-body a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: var(--radius-md);
            color: var(--color-sidebar-text);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            margin-bottom: 2px;
        }

        .offcanvas-sidebar .offcanvas-body a i {
            width: 20px;
            text-align: center;
            flex-shrink: 0;
            opacity: 0.75;
        }

        .offcanvas-sidebar .offcanvas-body a:hover {
            background: var(--color-sidebar-hover);
            color: #e8edf3;
        }

        .offcanvas-sidebar .offcanvas-body a.active {
            background: var(--color-sidebar-active);
            color: #fff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--color-accent);
        }

        /* ========== Container ========== */
        .content-container {
            max-width: 860px;
            margin: 0 auto;
            padding: 28px 24px 20px;
            width: 100%;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            padding: 0;
            list-style: none;
        }

        .breadcrumb-custom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-custom .sep {
            color: var(--color-text-light);
            font-size: 0.7rem;
        }

        .breadcrumb-custom .current {
            color: var(--color-text);
            font-weight: 500;
            pointer-events: none;
        }

        /* ========== Article Header ========== */
        .article-header {
            margin-bottom: 24px;
        }

        .article-category-badge {
            display: inline-block;
            background: var(--color-accent-light);
            color: var(--color-accent);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .article-category-badge:hover {
            background: var(--color-accent);
            color: #fff;
        }

        .article-title {
            font-size: 2rem;
            font-weight: 750;
            line-height: 1.35;
            color: var(--color-text);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.88rem;
            color: var(--color-text-muted);
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .article-meta .meta-item i {
            font-size: 0.8rem;
            opacity: 0.6;
        }

        .article-meta .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--color-text-light);
        }

        /* ========== Featured Image ========== */
        .article-featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 28px;
            box-shadow: var(--shadow-md);
            background: #e9ecf1;
            position: relative;
        }

        .article-featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
        }

        /* ========== Article Body ========== */
        .article-body {
            font-size: 1.04rem;
            line-height: 1.85;
            color: var(--color-text);
            margin-bottom: 32px;
        }

        .article-body h2 {
            font-size: 1.45rem;
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 16px;
            color: var(--color-primary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-border-light);
            letter-spacing: -0.005em;
        }

        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 650;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--color-text);
        }

        .article-body p {
            margin-bottom: 16px;
        }

        .article-body ul,
        .article-body ol {
            margin-bottom: 16px;
            padding-left: 24px;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body blockquote {
            border-left: 4px solid var(--color-accent);
            background: var(--color-accent-light);
            padding: 16px 20px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 20px 0;
            font-style: italic;
            color: var(--color-text-secondary);
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-body strong {
            font-weight: 650;
            color: var(--color-text);
        }

        .article-body a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-thickness: 1px;
            transition: color var(--transition-fast);
        }

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

        /* Article Not Found */
        .article-not-found {
            text-align: center;
            padding: 60px 30px;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }

        .article-not-found .nf-icon {
            font-size: 3.5rem;
            color: var(--color-text-light);
            margin-bottom: 16px;
        }

        .article-not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-text);
        }

        .article-not-found p {
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }

        /* ========== Tags ========== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 28px;
        }

        .article-tags .tag {
            display: inline-block;
            background: #f1f5f9;
            color: var(--color-text-secondary);
            font-size: 0.82rem;
            padding: 6px 14px;
            border-radius: 20px;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .article-tags .tag:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }

        /* ========== Divider ========== */
        .section-divider {
            border: none;
            border-top: 1px solid var(--color-border);
            margin: 28px 0;
        }

        /* ========== Related Articles ========== */
        .related-section {
            margin-bottom: 36px;
        }

        .related-section .section-label {
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.07em;
            color: var(--color-text-muted);
            font-weight: 600;
            margin-bottom: 16px;
        }

        .related-section h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--color-text);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 18px;
        }

        .related-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }

        .related-card .card-img-wrap {
            height: 160px;
            overflow: hidden;
            background: #e9ecf1;
            position: relative;
        }

        .related-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .related-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .related-card .card-body {
            padding: 16px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card .card-title {
            font-size: 0.96rem;
            font-weight: 650;
            color: var(--color-text);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-meta {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-top: auto;
            padding-top: 8px;
        }

        /* ========== CTA Section ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #1a4a70 100%);
            border-radius: var(--radius-xl);
            padding: 36px 32px;
            text-align: center;
            color: #fff;
            margin-bottom: 36px;
            box-shadow: var(--shadow-lg);
        }

        .cta-section h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.005em;
        }

        .cta-section p {
            color: rgba(255,255,255,0.8);
            margin-bottom: 20px;
            font-size: 0.96rem;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta {
            display: inline-block;
            background: var(--color-accent);
            color: #fff;
            font-weight: 650;
            padding: 12px 30px;
            border-radius: 30px;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            border: none;
            cursor: pointer;
            letter-spacing: 0.02em;
            box-shadow: 0 4px 16px rgba(232,148,58,0.35);
        }

        .btn-cta:hover {
            background: var(--color-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 22px rgba(232,148,58,0.45);
            color: #fff;
        }

        .btn-outline-light-custom {
            display: inline-block;
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 10px 26px;
            border-radius: 30px;
            font-size: 0.93rem;
            border: 2px solid rgba(255,255,255,0.5);
            transition: all var(--transition-base);
            cursor: pointer;
            letter-spacing: 0.02em;
        }

        .btn-outline-light-custom:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            color: #fff;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0B1622;
            color: rgba(255,255,255,0.7);
            padding: 40px 28px 28px;
            font-size: 0.9rem;
            margin-top: auto;
        }

        .site-footer .footer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .site-footer a {
            color: rgba(255,255,255,0.55);
            transition: color var(--transition-fast);
            font-size: 0.85rem;
        }

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

        .site-footer .footer-divider {
            border-color: rgba(255,255,255,0.1);
            margin: 22px 0 16px;
            opacity: 1;
        }

        .site-footer strong {
            font-size: 0.88rem;
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .app-sidebar {
                display: none !important;
            }

            .app-main {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
            }

            .article-title {
                font-size: 1.5rem;
            }

            .content-container {
                padding: 20px 16px 16px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .cta-section {
                padding: 28px 20px;
                border-radius: var(--radius-lg);
            }

            .cta-section h3 {
                font-size: 1.2rem;
            }

            .article-body {
                font-size: 0.98rem;
            }
        }

        @media (max-width: 575.98px) {
            .article-title {
                font-size: 1.3rem;
            }

            .article-meta {
                font-size: 0.8rem;
                gap: 10px;
            }

            .article-body h2 {
                font-size: 1.2rem;
            }

            .article-body h3 {
                font-size: 1.05rem;
            }

            .cta-section {
                padding: 22px 16px;
            }

            .content-container {
                padding: 14px 10px 12px;
            }

            .breadcrumb-custom {
                font-size: 0.78rem;
            }

            .site-footer {
                padding: 28px 16px 20px;
            }
        }

        @media (min-width: 992px) {
            .offcanvas-sidebar {
                display: none !important;
            }
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-xs);
        }

        /* Smooth scrollbar for sidebar */
        .app-sidebar::-webkit-scrollbar {
            width: 4px;
        }

        .app-sidebar::-webkit-scrollbar-track {
            background: transparent;
        }

        .app-sidebar::-webkit-scrollbar-thumb {
            background: rgba(255,255,255,0.12);
            border-radius: 4px;
        }

        .app-sidebar::-webkit-scrollbar-thumb:hover {
            background: rgba(255,255,255,0.2);
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #1a56db;
            --color-primary-dark: #1240a3;
            --color-primary-light: #e8f0fe;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-accent-light: #fef3c7;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-text-muted: #94a3b8;
            --color-bg: #f8fafc;
            --color-bg-white: #ffffff;
            --color-bg-dark: #0f172a;
            --color-bg-section: #f1f5f9;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-danger: #ef4444;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --sidebar-width: 250px;
            --sidebar-collapsed: 72px;
            --header-mobile-height: 60px;
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-heading: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-body);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        button,
        .btn {
            cursor: pointer;
            font-family: var(--font-body);
        }
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

        ul, ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-top: 0;
        }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }

        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }

        /* ========== 容器 ========== */
        .main-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .content-area {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-width: 0;
            transition: margin-left var(--transition);
        }

        /* ========== 左侧导航栏 (桌面端) ========== */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-bg-white);
            border-right: 1px solid var(--color-border);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            overflow-x: hidden;
            transition: width var(--transition), box-shadow var(--transition);
            box-shadow: var(--shadow-xs);
        }
        .sidebar-nav .nav-brand {
            padding: 24px 20px 20px;
            border-bottom: 1px solid var(--color-border-light);
            flex-shrink: 0;
        }
        .sidebar-nav .nav-brand a {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.01em;
        }
        .sidebar-nav .nav-brand a:hover {
            color: var(--color-primary);
        }
        .sidebar-nav .nav-brand .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), #3b82f6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav .nav-menu {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-menu .nav-item {
            display: block;
        }
        .sidebar-nav .nav-menu .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: var(--color-text-weak);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav .nav-menu .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .sidebar-nav .nav-menu .nav-link:hover {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .sidebar-nav .nav-menu .nav-link.active {
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-nav .nav-menu .nav-link.active i {
            color: #ffffff;
        }
        .sidebar-nav .nav-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--color-border-light);
            flex-shrink: 0;
            font-size: 0.78rem;
            color: var(--color-text-muted);
        }

        /* ========== 移动端顶部导航 ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-mobile-height);
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border);
            z-index: 1030;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-xs);
        }
        .mobile-header .mobile-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .mobile-brand .brand-icon-sm {
            width: 30px;
            height: 30px;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--color-primary), #3b82f6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .mobile-header .menu-toggle {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-bg-white);
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .mobile-header .menu-toggle:hover {
            background: var(--color-bg-section);
        }

        /* 移动端抽屉 */
        .mobile-drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15,23,42,0.55);
            z-index: 1050;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .mobile-drawer-overlay.show {
            opacity: 1;
        }
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: -280px;
            width: 280px;
            height: 100vh;
            background: var(--color-bg-white);
            z-index: 1055;
            transition: left var(--transition);
            overflow-y: auto;
            box-shadow: var(--shadow-xl);
            display: flex;
            flex-direction: column;
        }
        .mobile-drawer.open {
            left: 0;
        }
        .mobile-drawer .drawer-header {
            padding: 20px;
            border-bottom: 1px solid var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-shrink: 0;
        }
        .mobile-drawer .drawer-header .drawer-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--color-text);
        }
        .mobile-drawer .drawer-header .drawer-close {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            background: var(--color-bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1rem;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
        }
        .mobile-drawer .drawer-header .drawer-close:hover {
            background: #fee2e2;
            color: var(--color-danger);
            border-color: #fecaca;
        }
        .mobile-drawer .drawer-menu {
            flex: 1;
            padding: 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-drawer .drawer-menu .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 16px;
            border-radius: var(--radius);
            color: var(--color-text-weak);
            font-weight: 500;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }
        .mobile-drawer .drawer-menu .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
        }
        .mobile-drawer .drawer-menu .nav-link:hover {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .mobile-drawer .drawer-menu .nav-link.active {
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 600;
        }

        /* ========== Hero 板块 ========== */
        .hero-section {
            position: relative;
            background: linear-gradient(160deg, #0f172a 0%, #1e3a5f 40%, #1a4b8c 100%);
            color: #ffffff;
            padding: 80px 40px 90px;
            overflow: hidden;
            min-height: 460px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 0;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255,255,255,0.03);
            z-index: 0;
            pointer-events: none;
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 1;
            max-width: 700px;
        }
        .hero-section .hero-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.2);
            color: #ffffff;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .hero-section h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .hero-section .hero-desc {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.8);
            margin-bottom: 30px;
            line-height: 1.7;
            max-width: 560px;
        }
        .hero-section .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #1e293b;
            border: none;
            padding: 13px 28px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(245,158,11,0.35);
            white-space: nowrap;
        }
        .btn-hero-primary:hover {
            background: var(--color-accent-dark);
            color: #1e293b;
            box-shadow: 0 6px 22px rgba(245,158,11,0.45);
            transform: translateY(-1px);
        }
        .btn-hero-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255,255,255,0.55);
            padding: 13px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-hero-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #ffffff;
            color: #ffffff;
        }

        /* ========== 板块通用 ========== */
        .section-block {
            padding: 70px 40px;
        }
        .section-block.alt-bg {
            background: var(--color-bg-section);
        }
        .section-block .section-label {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.82rem;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        .section-block .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-block .section-subtitle {
            color: var(--color-text-weak);
            font-size: 1.05rem;
            margin-bottom: 40px;
            max-width: 600px;
        }

        /* ========== 卡片 ========== */
        .service-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: transparent;
            transform: translateY(-3px);
        }
        .service-card .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }
        .service-card .card-icon-wrap.blue {
            background: #eff6ff;
            color: var(--color-primary);
        }
        .service-card .card-icon-wrap.amber {
            background: #fffbeb;
            color: #d97706;
        }
        .service-card .card-icon-wrap.green {
            background: #ecfdf5;
            color: #059669;
        }
        .service-card .card-icon-wrap.purple {
            background: #f5f3ff;
            color: #7c3aed;
        }
        .service-card h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .service-card p {
            color: var(--color-text-weak);
            font-size: 0.93rem;
            margin-bottom: 0;
            line-height: 1.65;
        }
        .service-card .card-img {
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 20px;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-section);
        }
        .service-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .service-card:hover .card-img img {
            transform: scale(1.04);
        }

        /* ========== 流程步骤 ========== */
        .step-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            counter-reset: step;
            position: relative;
        }
        .step-item {
            flex: 1;
            min-width: 200px;
            text-align: center;
            padding: 0 16px 30px;
            position: relative;
            counter-increment: step;
        }
        .step-item::before {
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 18px;
            position: relative;
            z-index: 2;
            box-shadow: 0 4px 12px rgba(26,86,219,0.3);
        }
        .step-item:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 24px;
            right: -30%;
            width: 60%;
            height: 2px;
            background: var(--color-border);
            z-index: 1;
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .step-item p {
            color: var(--color-text-weak);
            font-size: 0.88rem;
            margin-bottom: 0;
        }

        /* ========== 优势数据卡 ========== */
        .stat-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            height: 100%;
        }
        .stat-card:hover {
            box-shadow: var(--shadow);
            border-color: transparent;
        }
        .stat-card .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-card .stat-label {
            color: var(--color-text-weak);
            font-size: 0.9rem;
            font-weight: 500;
        }

        /* ========== 场景标签 ========== */
        .scenario-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .scenario-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--color-bg-white);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            transition: all var(--transition-fast);
        }
        .scenario-tag:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-light);
        }
        .scenario-tag i {
            font-size: 0.85rem;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
        }
        .faq-item {
            background: var(--color-bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--color-border-light);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: transparent;
            border: none;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            cursor: pointer;
            text-align: left;
            transition: background var(--transition-fast);
            gap: 12px;
        }
        .faq-item .faq-question:hover {
            background: var(--color-bg-section);
        }
        .faq-item .faq-question i {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer p {
            color: var(--color-text-weak);
            font-size: 0.93rem;
            margin: 0;
            line-height: 1.7;
        }

        /* ========== CTA 板块 ========== */
        .cta-section {
            background: linear-gradient(150deg, #0f172a 0%, #1e3a5f 60%, #1a4b8c 100%);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
            pointer-events: none;
        }
        .cta-section h2 {
            color: #ffffff;
            font-size: 1.9rem;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            color: rgba(255,255,255,0.75);
            font-size: 1.05rem;
            margin-bottom: 26px;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #1e293b;
            border: none;
            padding: 14px 34px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition);
            box-shadow: 0 6px 20px rgba(245,158,11,0.4);
            position: relative;
            z-index: 1;
        }
        .btn-cta:hover {
            background: #fbbf24;
            color: #1e293b;
            box-shadow: 0 8px 28px rgba(245,158,11,0.5);
            transform: translateY(-2px);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 40px 40px 24px;
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .site-footer .footer-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 10px;
        }
        .site-footer a {
            color: rgba(255,255,255,0.55);
            transition: color var(--transition-fast);
            font-size: 0.88rem;
        }
        .site-footer a:hover {
            color: rgba(255,255,255,0.85);
        }
        .site-footer strong {
            font-size: 0.9rem;
        }
        .site-footer .footer-divider {
            border-color: rgba(255,255,255,0.1);
            margin: 20px 0;
        }

        /* ========== 按钮通用 ========== */
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: 2px solid var(--color-border);
            background: transparent;
            color: var(--color-text);
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.93rem;
            transition: all var(--transition-fast);
        }
        .btn-outline-custom:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-light);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 991.98px) {
            .sidebar-nav {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .mobile-drawer-overlay {
                display: block;
                pointer-events: none;
            }
            .mobile-drawer-overlay.show {
                pointer-events: auto;
            }
            .content-area {
                margin-left: 0;
                padding-top: var(--header-mobile-height);
            }
            .hero-section {
                padding: 50px 20px 60px;
                min-height: auto;
            }
            .hero-section h1 {
                font-size: 1.9rem;
            }
            .hero-section .hero-desc {
                font-size: 0.95rem;
            }
            .section-block {
                padding: 44px 20px;
            }
            .section-block .section-title {
                font-size: 1.55rem;
            }
            .cta-section {
                padding: 36px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.45rem;
            }
            .step-item:not(:last-child)::after {
                display: none;
            }
            .step-item {
                min-width: 140px;
                padding: 0 10px 24px;
            }
            .site-footer {
                padding: 30px 20px 20px;
            }
            h1 { font-size: 1.9rem; }
            h2 { font-size: 1.55rem; }
        }
        @media (max-width: 575.98px) {
            .hero-section {
                padding: 40px 16px 48px;
            }
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .hero-section .hero-btns {
                flex-direction: column;
                gap: 10px;
            }
            .btn-hero-primary,
            .btn-hero-outline {
                justify-content: center;
                width: 100%;
            }
            .section-block {
                padding: 34px 16px;
            }
            .section-block .section-title {
                font-size: 1.35rem;
            }
            .service-card {
                padding: 20px 16px;
            }
            .stat-card .stat-number {
                font-size: 2rem;
            }
            .cta-section {
                padding: 30px 16px;
            }
            .cta-section h2 {
                font-size: 1.25rem;
            }
            .site-footer {
                padding: 24px 16px 18px;
                font-size: 0.82rem;
            }
            h1 { font-size: 1.6rem; }
            h2 { font-size: 1.35rem; }
            h3 { font-size: 1.15rem; }
            .step-item {
                flex: 1 1 100%;
                min-width: 100%;
            }
        }