/* roulang page: index */
:root {
            --color-primary: #1a3c5e;
            --color-primary-light: #2a5a8a;
            --color-accent: #c8923b;
            --color-accent-light: #e0b060;
            --color-bg: #f8f7f4;
            --color-surface: #ffffff;
            --color-surface-alt: #f0ede6;
            --color-text: #2c2c2c;
            --color-text-weak: #6b6b6b;
            --color-text-light: #999999;
            --color-border: #e0dcd3;
            --color-border-light: #eeece5;
            --color-success: #3a7d5f;
            --color-shadow: rgba(26, 60, 94, 0.08);
            --color-shadow-hover: rgba(26, 60, 94, 0.16);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 2px 12px var(--color-shadow);
            --shadow-card-hover: 0 8px 28px var(--color-shadow-hover);
            --shadow-nav: 2px 0 20px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --sidebar-width: 264px;
            --font-heading: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            font-family: var(--font-body);
        }
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

        ul {
            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: 2.2rem;
            letter-spacing: -0.01em;
        }
        h2 {
            font-size: 1.75rem;
            letter-spacing: -0.005em;
        }
        h3 {
            font-size: 1.3rem;
        }
        h4 {
            font-size: 1.1rem;
        }

        /* ── App Shell Layout ── */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        /* ── Sidebar ── */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #fff;
            box-shadow: var(--shadow-nav);
            z-index: 40;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            overflow-x: hidden;
            transition: transform var(--transition-normal);
        }
        .app-sidebar .sidebar-inner {
            padding: 28px 22px 40px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 36px;
            text-decoration: none;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .sidebar-logo .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-logo .logo-text {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.05rem;
            line-height: 1.3;
            color: var(--color-primary);
        }
        .sidebar-nav {
            flex: 1;
        }
        .sidebar-nav .nav-group-title {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-text-light);
            margin-bottom: 10px;
            padding-left: 4px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            color: var(--color-text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            margin-bottom: 2px;
            position: relative;
        }
        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }
        .sidebar-nav a:hover {
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }
        .sidebar-nav a:hover i {
            color: var(--color-primary);
        }
        .sidebar-nav a.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 3px 12px rgba(26, 60, 94, 0.25);
        }
        .sidebar-nav a.active i {
            color: #fff;
        }
        .sidebar-footer {
            flex-shrink: 0;
            padding-top: 20px;
            border-top: 1px solid var(--color-border-light);
            margin-top: 16px;
        }
        .sidebar-footer .footer-note {
            font-size: 0.78rem;
            color: var(--color-text-light);
            line-height: 1.5;
        }

        /* ── Main Content ── */
        .app-main {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ── Mobile Top Bar ── */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #fff;
            z-index: 50;
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.07);
            align-items: center;
            padding: 0 16px;
            gap: 12px;
        }
        .mobile-topbar .hamburger-btn {
            width: 38px;
            height: 38px;
            border: none;
            background: transparent;
            font-size: 1.4rem;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .mobile-topbar .mobile-logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-primary);
            flex: 1;
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 41;
            opacity: 0;
            transition: opacity var(--transition-normal);
            pointer-events: none;
        }
        .mobile-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* ── Container ── */
        .content-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }
        .section-spacing {
            padding: 64px 0;
        }
        .section-spacing-sm {
            padding: 40px 0;
        }
        .section-spacing-lg {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-header h2 {
            margin-bottom: 12px;
            color: var(--color-text);
        }
        .section-header .section-subtitle {
            color: var(--color-text-weak);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        /* ── Hero ── */
        .hero-section {
            position: relative;
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 520px;
            display: flex;
            align-items: center;
            color: #fff;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 60, 94, 0.88) 0%, rgba(26, 60, 94, 0.72) 60%, rgba(26, 60, 94, 0.55) 100%);
            z-index: 1;
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 2;
            padding: 48px 0;
            max-width: 700px;
        }
        .hero-section .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: 18px;
            color: #fff;
        }
        .hero-section h1 {
            color: #fff;
            font-size: 2.5rem;
            margin-bottom: 16px;
            line-height: 1.25;
            letter-spacing: -0.012em;
        }
        .hero-section .hero-desc {
            font-size: 1.1rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
        }
        .hero-section .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* ── Buttons ── */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition-fast);
            cursor: pointer;
            font-family: var(--font-body);
            text-decoration: none;
            line-height: 1.3;
        }
        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 3px 14px rgba(200, 146, 59, 0.3);
        }
        .btn-primary:hover {
            background: var(--color-accent-light);
            color: #fff;
            box-shadow: 0 6px 22px rgba(200, 146, 59, 0.4);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid #fff;
            color: #fff;
        }
        .btn-outline:hover {
            background: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }
        .btn-outline-dark {
            background: transparent;
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
        }
        .btn-outline-dark:hover {
            background: var(--color-primary);
            color: #fff;
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 14px 30px;
            font-size: 1.05rem;
        }

        /* ── Stats Row ── */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-primary);
            font-family: var(--font-heading);
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-card .stat-unit {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-accent);
            display: block;
            margin-bottom: 4px;
        }
        .stat-card .stat-label {
            font-size: 0.88rem;
            color: var(--color-text-weak);
        }

        /* ── Service Cards ── */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
        }
        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .service-card .card-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .service-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-normal);
        }
        .service-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .service-card .card-body {
            padding: 22px 20px 24px;
        }
        .service-card .card-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--color-accent);
            background: rgba(200, 146, 59, 0.1);
            padding: 3px 10px;
            border-radius: 12px;
            margin-bottom: 10px;
        }
        .service-card h3 {
            margin-bottom: 8px;
            font-size: 1.1rem;
        }
        .service-card p {
            color: var(--color-text-weak);
            font-size: 0.9rem;
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .service-card .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition-fast);
        }
        .service-card .card-link:hover {
            gap: 9px;
            color: var(--color-primary-light);
        }

        /* ── CMS List ── */
        .cms-list {
            display: grid;
            gap: 12px;
        }
        .cms-list-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 16px;
            box-shadow: 0 1px 6px var(--color-shadow);
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }
        .cms-list-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-card-hover);
        }
        .cms-list-item .cms-date {
            flex-shrink: 0;
            width: 58px;
            text-align: center;
            font-weight: 700;
            color: var(--color-accent);
            font-size: 0.8rem;
            line-height: 1.3;
            background: rgba(200, 146, 59, 0.08);
            padding: 8px 6px;
            border-radius: var(--radius-sm);
        }
        .cms-list-item .cms-info {
            flex: 1;
            min-width: 0;
        }
        .cms-list-item .cms-info h4 {
            font-size: 0.98rem;
            margin-bottom: 3px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .cms-list-item .cms-info h4 a {
            color: var(--color-text);
        }
        .cms-list-item .cms-info h4 a:hover {
            color: var(--color-primary);
        }
        .cms-list-item .cms-excerpt {
            font-size: 0.84rem;
            color: var(--color-text-weak);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin: 0;
        }
        .cms-empty {
            text-align: center;
            padding: 40px;
            color: var(--color-text-light);
            font-size: 0.95rem;
        }

        /* ── Process Steps ── */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .process-step {
            text-align: center;
            position: relative;
        }
        .process-step .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            position: relative;
            z-index: 2;
            box-shadow: 0 4px 16px rgba(26, 60, 94, 0.25);
        }
        .process-step h4 {
            font-size: 0.98rem;
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.84rem;
            color: var(--color-text-weak);
            line-height: 1.5;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 26px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: var(--color-border);
            z-index: 1;
        }

        /* ── Trust / Partners ── */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            align-items: center;
        }
        .trust-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .trust-item:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .trust-item .trust-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 10px;
        }
        .trust-item h4 {
            font-size: 0.92rem;
            margin-bottom: 4px;
        }
        .trust-item p {
            font-size: 0.8rem;
            color: var(--color-text-weak);
            margin: 0;
        }

        /* ── FAQ ── */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            box-shadow: 0 1px 5px var(--color-shadow);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.98rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: background var(--transition-fast);
            color: var(--color-text);
        }
        .faq-item .faq-question:hover {
            background: var(--color-surface-alt);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition-fast);
            color: var(--color-text-weak);
            font-size: 0.85rem;
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            color: var(--color-text-weak);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item.open {
            border-color: var(--color-primary);
            box-shadow: 0 3px 16px var(--color-shadow-hover);
        }

        /* ── CTA ── */
        .cta-section {
            background: var(--color-primary);
            color: #fff;
            text-align: center;
            border-radius: var(--radius-xl);
            padding: 52px 32px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            font-size: 1rem;
        }
        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        /* ── Footer ── */
        .site-footer {
            background: #1a2a38;
            color: rgba(255, 255, 255, 0.7);
            padding: 36px 0;
            font-size: 0.88rem;
            line-height: 1.8;
        }
        .site-footer .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .site-footer .footer-brand {
            font-weight: 700;
            color: #fff;
            font-size: 1rem;
            font-family: var(--font-heading);
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.7);
        }
        .site-footer a:hover {
            color: #fff;
        }
        .site-footer .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .site-footer .footer-copy {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.8rem;
        }

        /* ── Responsive ── */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 240px;
            }
            .content-container {
                padding: 0 24px;
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px 16px;
            }
            .process-steps::before {
                display: none;
            }
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-section h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .app-sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .app-sidebar.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .mobile-overlay {
                display: block;
            }
            .app-main {
                margin-left: 0;
                padding-top: 56px;
            }
            .content-container {
                padding: 0 16px;
            }
            .section-spacing {
                padding: 40px 0;
            }
            .section-spacing-lg {
                padding: 50px 0;
            }
            .hero-section {
                min-height: 400px;
            }
            .hero-section h1 {
                font-size: 1.6rem;
            }
            .hero-section .hero-desc {
                font-size: 0.95rem;
            }
            .service-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .stat-card {
                padding: 20px 14px;
            }
            .stat-card .stat-number {
                font-size: 1.7rem;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 24px 12px;
            }
            .trust-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .cta-section {
                padding: 36px 20px;
                border-radius: var(--radius-lg);
            }
            .site-footer .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-links {
                justify-content: center;
                gap: 14px;
            }
            .cms-list-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .cms-list-item .cms-date {
                width: auto;
                padding: 5px 12px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.4rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .trust-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .hero-section .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-section .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: article */
:root {
            --sidebar-bg: #0b1622;
            --sidebar-hover: #152436;
            --sidebar-active: #1a3050;
            --sidebar-text: #bcc5d0;
            --sidebar-text-active: #ffffff;
            --sidebar-accent: #c9a84c;
            --sidebar-width: 260px;
            --primary: #1e3a5f;
            --primary-light: #2a5080;
            --accent: #c9a84c;
            --accent-light: #d4b86a;
            --accent-dark: #a88a35;
            --bg-page: #f4f5f7;
            --bg-white: #ffffff;
            --text-main: #1c2838;
            --text-secondary: #556577;
            --text-weak: #7d8fa3;
            --border: #dfe3e8;
            --border-light: #eef1f5;
            --shadow-sm: 0 1px 3px rgba(11, 22, 34, 0.06);
            --shadow-md: 0 4px 16px rgba(11, 22, 34, 0.08);
            --shadow-lg: 0 8px 32px rgba(11, 22, 34, 0.10);
            --shadow-xl: 0 16px 48px rgba(11, 22, 34, 0.12);
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-page);
            min-height: 100vh;
            display: flex;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            color: var(--text-main);
            line-height: 1.35;
            margin-top: 0;
        }

        /* ========== App Layout ========== */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        /* ========== Sidebar ========== */
        .app-sidebar {
            width: var(--sidebar-width);
            min-width: var(--sidebar-width);
            background: var(--sidebar-bg);
            color: var(--sidebar-text);
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            z-index: 100;
            display: flex;
            flex-direction: column;
            box-shadow: 2px 0 24px rgba(0, 0, 0, 0.18);
            transition: transform var(--transition);
            overflow-y: auto;
        }

        .sidebar-header {
            padding: 24px 20px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .sidebar-logo {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            line-height: 1.3;
        }
        .sidebar-logo:hover {
            color: var(--sidebar-accent);
        }
        .sidebar-logo .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #1a1a1a;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .nav-group-title {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: rgba(255, 255, 255, 0.3);
            padding: 8px 12px 6px 12px;
            font-weight: 600;
            margin-top: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            color: var(--sidebar-text);
            font-size: 0.93rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.01em;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 0.95rem;
            opacity: 0.8;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            background: var(--sidebar-hover);
            color: #ffffff;
        }
        .sidebar-nav a.active {
            background: var(--sidebar-active);
            color: var(--sidebar-text-active);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--sidebar-accent);
        }
        .sidebar-nav a.active i {
            opacity: 1;
            color: var(--sidebar-accent);
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.35);
            flex-shrink: 0;
            text-align: center;
            letter-spacing: 0.02em;
        }

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

        /* ========== Mobile Toggle ========== */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 200;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1.2rem;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            transition: all var(--transition);
        }
        .mobile-nav-toggle:hover {
            background: var(--primary-light);
        }
        .mobile-nav-toggle:active {
            transform: scale(0.94);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 99;
            transition: opacity var(--transition);
        }
        .sidebar-overlay.show {
            display: block;
        }

        /* ========== Article Hero Banner ========== */
        .article-hero {
            position: relative;
            background: linear-gradient(160deg, #0d1b2e 0%, #142840 30%, #1a3050 60%, #0f1f35 100%);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 56px 40px 48px;
            color: #ffffff;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 22, 34, 0.55) 0%, rgba(11, 22, 34, 0.78) 100%);
            z-index: 1;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent) 0%, var(--accent-light) 50%, var(--accent) 100%);
            z-index: 2;
        }
        .article-hero-content {
            position: relative;
            z-index: 3;
            max-width: 860px;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        .article-breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
        }
        .article-breadcrumb a:hover {
            color: var(--accent-light);
        }
        .breadcrumb-sep {
            opacity: 0.5;
            font-size: 0.7rem;
        }
        .breadcrumb-current {
            color: rgba(255, 255, 255, 0.55);
            pointer-events: none;
        }

        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
            line-height: 1.3;
        }
        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
        }
        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-item i {
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .article-category-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(201, 168, 76, 0.25);
            color: var(--accent-light);
            font-weight: 600;
            font-size: 0.82rem;
            letter-spacing: 0.02em;
            border: 1px solid rgba(201, 168, 76, 0.35);
        }

        /* ========== Article Body ========== */
        .article-body-section {
            padding: 40px 40px 20px;
            max-width: 920px;
        }

        .article-content-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            line-height: 1.85;
            font-size: 1.02rem;
            color: var(--text-main);
        }

        .article-content-card h2 {
            font-size: 1.55rem;
            margin-top: 2em;
            margin-bottom: 0.7em;
            color: var(--primary);
            font-weight: 700;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-light);
        }
        .article-content-card h3 {
            font-size: 1.25rem;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            font-weight: 600;
            color: #2a3f5a;
        }
        .article-content-card h4 {
            font-size: 1.1rem;
            margin-top: 1.4em;
            margin-bottom: 0.5em;
            font-weight: 600;
        }
        .article-content-card p {
            margin-bottom: 1.25em;
        }
        .article-content-card ul,
        .article-content-card ol {
            margin-bottom: 1.25em;
            padding-left: 1.5em;
        }
        .article-content-card li {
            margin-bottom: 0.45em;
        }
        .article-content-card blockquote {
            border-left: 4px solid var(--accent);
            margin: 1.6em 0;
            padding: 14px 22px;
            background: #fdfaf3;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: #5a4a2a;
            font-style: italic;
        }
        .article-content-card img {
            border-radius: var(--radius);
            margin: 1.5em auto;
            box-shadow: var(--shadow-sm);
        }
        .article-content-card a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content-card a:hover {
            color: var(--accent-dark);
        }
        .article-content-card table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 0.95rem;
        }
        .article-content-card th {
            background: #f0f3f7;
            padding: 10px 14px;
            text-align: left;
            font-weight: 600;
            border: 1px solid var(--border);
        }
        .article-content-card td {
            padding: 10px 14px;
            border: 1px solid var(--border);
        }

        /* ========== Article Footer Bar ========== */
        .article-footer-bar {
            max-width: 920px;
            margin: 0 40px;
            padding: 20px 0 30px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-light);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .article-tags span.label-text {
            font-size: 0.85rem;
            color: var(--text-weak);
            font-weight: 500;
        }
        .article-tag {
            display: inline-block;
            padding: 5px 12px;
            border-radius: 16px;
            background: #eef2f7;
            color: var(--text-secondary);
            font-size: 0.82rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition);
        }
        .article-tag:hover {
            background: #dce4f0;
            color: var(--primary);
        }
        .article-share {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .article-share span {
            font-size: 0.85rem;
            color: var(--text-weak);
            font-weight: 500;
        }
        .share-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: var(--bg-white);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .share-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        /* ========== Not Found State ========== */
        .not-found-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            max-width: 600px;
            margin: 40px auto;
        }
        .not-found-card .nf-icon {
            font-size: 3.5rem;
            color: var(--text-weak);
            margin-bottom: 16px;
            opacity: 0.5;
        }
        .not-found-card h3 {
            font-size: 1.4rem;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .not-found-card p {
            color: var(--text-secondary);
            margin-bottom: 22px;
        }
        .not-found-card .btn-back {
            display: inline-block;
            padding: 11px 28px;
            border-radius: 24px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition);
            font-size: 0.95rem;
        }
        .not-found-card .btn-back:hover {
            background: var(--primary-light);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        /* ========== Related Section ========== */
        .related-section {
            padding: 10px 40px 40px;
            max-width: 920px;
        }
        .related-section .section-label {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-weak);
            margin-bottom: 16px;
            font-weight: 600;
        }
        .related-cards {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 16px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 20px 18px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-decoration: none;
            color: var(--text-main);
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            transform: translateY(-2px);
        }
        .related-card .rc-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: #eef4fb;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--primary);
            font-size: 1rem;
        }
        .related-card .rc-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin: 0 0 4px;
            color: var(--text-main);
        }
        .related-card .rc-info p {
            font-size: 0.82rem;
            color: var(--text-weak);
            margin: 0;
        }

        /* ========== FAQ Section ========== */
        .faq-section {
            padding: 40px;
            max-width: 920px;
        }
        .faq-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--text-main);
            text-align: center;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-weak);
            transition: transform var(--transition);
        }
        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item.open {
            border-color: #d4c38a;
        }

        /* ========== CTA Section ========== */
        .cta-section {
            margin: 30px 40px 40px;
            max-width: 920px;
            background: linear-gradient(135deg, #1a3050 0%, #0f1f35 100%);
            border-radius: var(--radius-lg);
            padding: 44px 36px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(201, 168, 76, 0.1);
            z-index: 0;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            font-size: 1rem;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta {
            display: inline-block;
            padding: 13px 32px;
            border-radius: 28px;
            background: var(--accent);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            transition: all var(--transition);
            letter-spacing: 0.02em;
            box-shadow: 0 4px 18px rgba(201, 168, 76, 0.35);
        }
        .btn-cta:hover {
            background: var(--accent-light);
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(201, 168, 76, 0.45);
        }
        .btn-cta:active {
            transform: translateY(1px);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0d1824;
            color: rgba(255, 255, 255, 0.7);
            padding: 28px 40px;
            margin-top: auto;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
            align-items: center;
            max-width: 1100px;
        }
        .footer-brand {
            font-weight: 700;
            color: #ffffff;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
        }
        .footer-copy {
            font-size: 0.82rem;
            opacity: 0.7;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            text-decoration: none;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-light);
        }

        /* ========== Responsive ========== */
        @media screen and (max-width: 1024px) {
            .article-hero h1 {
                font-size: 1.75rem;
            }
            .article-content-card {
                padding: 30px 28px;
            }
            .article-hero {
                padding: 40px 28px 36px;
            }
            .article-body-section {
                padding: 28px 20px 14px;
            }
            .article-footer-bar {
                margin: 0 20px;
                padding: 18px 0 24px;
            }
            .related-section {
                padding: 8px 20px 32px;
            }
            .faq-section {
                padding: 28px 20px;
            }
            .cta-section {
                margin: 24px 20px 32px;
                padding: 36px 24px;
            }
            .site-footer {
                padding: 22px 20px;
            }
        }

        @media screen and (max-width: 768px) {
            .app-sidebar {
                transform: translateX(-100%);
                box-shadow: none;
            }
            .app-sidebar.mobile-open {
                transform: translateX(0);
                box-shadow: 4px 0 32px rgba(0, 0, 0, 0.45);
            }
            .sidebar-overlay.show {
                display: block;
            }
            .mobile-nav-toggle {
                display: flex;
            }
            .app-main {
                margin-left: 0;
                padding-top: 56px;
            }
            .article-hero {
                padding: 32px 18px 30px;
            }
            .article-hero h1 {
                font-size: 1.45rem;
            }
            .article-meta-row {
                gap: 10px;
                font-size: 0.8rem;
            }
            .article-content-card {
                padding: 22px 16px;
                font-size: 0.95rem;
            }
            .article-body-section {
                padding: 18px 10px 10px;
            }
            .article-footer-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin: 0 10px;
                padding: 16px 0 20px;
            }
            .related-cards {
                grid-template-columns: 1fr;
            }
            .related-section {
                padding: 6px 10px 24px;
            }
            .faq-section {
                padding: 22px 10px;
            }
            .faq-section .section-title {
                font-size: 1.25rem;
            }
            .cta-section {
                margin: 20px 10px 28px;
                padding: 28px 18px;
            }
            .cta-section h3 {
                font-size: 1.2rem;
            }
            .site-footer {
                padding: 18px 14px;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }
            .footer-links {
                justify-content: center;
                gap: 12px;
            }
        }

        @media screen and (max-width: 480px) {
            .article-hero h1 {
                font-size: 1.25rem;
            }
            .article-hero {
                padding: 24px 14px 24px;
            }
            .article-content-card {
                padding: 16px 12px;
                font-size: 0.9rem;
                border-radius: var(--radius);
            }
            .article-breadcrumb {
                font-size: 0.75rem;
            }
            .article-category-tag {
                font-size: 0.72rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
            .btn-cta {
                padding: 11px 24px;
                font-size: 0.9rem;
            }
            .related-card {
                padding: 14px 12px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #0a2647;
            --color-primary-light: #13325c;
            --color-accent: #c5a572;
            --color-accent-light: #d9c28b;
            --color-accent-dark: #a8894e;
            --color-bg: #f8f6f3;
            --color-bg-white: #ffffff;
            --color-bg-light: #f0ede8;
            --color-text: #1a1a1a;
            --color-text-weak: #5c5c5c;
            --color-text-light: #888888;
            --color-border: #e0dcd5;
            --color-border-light: #eeece6;
            --color-success: #2d7d46;
            --color-white: #ffffff;
            --sidebar-width: 260px;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

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

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

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

        h1, h2, h3, h4, h5, h6 {
            margin-top: 0;
            line-height: 1.3;
            color: var(--color-primary);
        }

        h1 { font-size: 2.6rem; font-weight: 700; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; font-weight: 700; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; font-weight: 600; }
        h4 { font-size: 1.2rem; font-weight: 600; }

        p {
            margin-top: 0;
            margin-bottom: 1rem;
            color: var(--color-text-weak);
        }

        /* ========== 桌面端侧边栏 ========== */
        .sidebar-desktop {
            position: fixed;
            left: 0;
            top: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-primary);
            z-index: 100;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            box-shadow: 2px 0 20px rgba(0,0,0,0.15);
        }

        .sidebar-logo-area {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.12);
        }

        .sidebar-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0.03em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-group-title {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: rgba(255,255,255,0.4);
            padding: 12px 24px 8px;
            font-weight: 600;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 24px;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.75);
            font-weight: 500;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            position: relative;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.5);
            transition: color var(--transition-fast);
        }

        .sidebar-nav a:hover {
            color: var(--color-white);
            background: rgba(255,255,255,0.06);
            border-left-color: rgba(255,255,255,0.3);
        }

        .sidebar-nav a:hover i {
            color: var(--color-accent-light);
        }

        .sidebar-nav a.active {
            color: var(--color-white);
            background: rgba(197,165,114,0.18);
            border-left-color: var(--color-accent);
            font-weight: 600;
        }

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

        .sidebar-footer-note {
            padding: 20px 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.75rem;
            color: rgba(255,255,255,0.35);
            text-align: center;
        }

        /* ========== 主内容区 ========== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            transition: margin var(--transition-normal);
        }

        .off-canvas-content {
            background: var(--color-bg);
        }

        /* ========== 移动端顶部栏 ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--color-primary);
            z-index: 90;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }

        .mobile-topbar .mobile-logo {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0.02em;
        }

        .mobile-topbar .mobile-logo i {
            color: var(--color-accent);
            margin-right: 8px;
        }

        .hamburger-btn {
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 1.4rem;
            cursor: pointer;
            padding: 8px;
            line-height: 1;
            transition: color var(--transition-fast);
        }

        .hamburger-btn:hover {
            color: var(--color-accent-light);
        }

        .hamburger-btn:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ========== Off-Canvas 移动端导航 ========== */
        .off-canvas.position-left {
            background: var(--color-primary);
            width: 280px;
        }

        .off-canvas .sidebar-nav {
            padding-top: 20px;
        }

        .off-canvas .sidebar-logo-area {
            padding: 24px 20px 16px;
            border-bottom: 1px solid rgba(255,255,255,0.12);
        }

        .off-canvas .sidebar-nav a {
            padding: 14px 20px;
            font-size: 1rem;
        }

        .off-canvas .close-offcanvas {
            position: absolute;
            top: 16px;
            right: 16px;
            background: none;
            border: none;
            color: rgba(255,255,255,0.7);
            font-size: 1.3rem;
            cursor: pointer;
            z-index: 10;
            transition: color var(--transition-fast);
        }

        .off-canvas .close-offcanvas:hover {
            color: var(--color-white);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 70px 0;
        }

        .section-sm {
            padding: 50px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 16px;
            color: var(--color-primary);
        }

        .section-subtitle {
            text-align: center;
            color: var(--color-text-weak);
            font-size: 1.1rem;
            max-width: 680px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-accent-dark);
            background: rgba(197,165,114,0.12);
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .text-center { text-align: center; }

        /* ========== Hero 板块 ========== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,38,71,0.88) 0%, rgba(10,38,71,0.7) 40%, rgba(10,38,71,0.55) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0;
            width: 100%;
        }

        .hero-content .hero-badge {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--color-accent-light);
            background: rgba(197,165,114,0.15);
            border: 1px solid rgba(197,165,114,0.3);
            padding: 8px 20px;
            border-radius: 24px;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 18px;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .hero-content .hero-desc {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 30px;
            cursor: pointer;
            transition: all var(--transition-normal);
            border: 2px solid transparent;
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
            color: var(--color-primary);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-white);
            border-color: rgba(255,255,255,0.5);
        }

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

        .btn:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }

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

        /* ========== 服务卡片 ========== */
        .service-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }

        .service-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(10,38,71,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--color-primary);
            margin-bottom: 20px;
            transition: all var(--transition-normal);
        }

        .service-card:hover .card-icon {
            background: var(--color-primary);
            color: var(--color-accent);
        }

        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
        }

        .service-card p {
            font-size: 0.95rem;
            color: var(--color-text-weak);
            margin-bottom: 0;
            flex-grow: 1;
        }

        .service-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-accent-dark);
            margin-top: 16px;
            transition: gap var(--transition-fast);
        }

        .service-card .card-link:hover {
            gap: 10px;
            color: var(--color-primary);
        }

        .service-card .card-img {
            border-radius: var(--radius-md);
            margin-bottom: 20px;
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform var(--transition-normal);
        }

        .service-card:hover .card-img {
            transform: scale(1.03);
        }

        /* ========== 行业标签 ========== */
        .industry-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            background: var(--color-bg-white);
            border: 1px solid var(--color-border);
            border-radius: 28px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text);
            transition: all var(--transition-fast);
            cursor: default;
        }

        .industry-tag:hover {
            border-color: var(--color-accent);
            background: rgba(197,165,114,0.06);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .industry-tag i {
            color: var(--color-accent-dark);
            font-size: 0.85rem;
        }

        /* ========== 流程步骤 ========== */
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 24px 0;
            border-bottom: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
        }

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

        .step-number {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            transition: all var(--transition-normal);
        }

        .step-item:hover .step-number {
            background: var(--color-accent);
            color: var(--color-primary);
            transform: scale(1.08);
        }

        .step-body h4 {
            margin-bottom: 6px;
            font-size: 1.15rem;
        }

        .step-body p {
            margin-bottom: 0;
            font-size: 0.95rem;
        }

        /* ========== FAQ Accordion 覆盖 ========== */
        .accordion {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .accordion-item {
            border-bottom: 1px solid var(--color-border-light);
            background: var(--color-bg-white);
        }

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

        .accordion-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-primary);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: all var(--transition-fast);
            border: none;
            background: transparent;
            cursor: pointer;
            width: 100%;
            text-align: left;
        }

        .accordion-title:hover {
            background: rgba(10,38,71,0.03);
        }

        .accordion-title::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 1rem;
            color: var(--color-accent-dark);
            transition: transform var(--transition-normal);
            flex-shrink: 0;
            margin-left: 12px;
        }

        .is-active .accordion-title::after {
            transform: rotate(180deg);
        }

        .accordion-content {
            padding: 0 24px 20px;
            color: var(--color-text-weak);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

        .is-active .accordion-content {
            display: block;
        }

        /* ========== CTA 板块 ========== */
        .cta-section {
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10,38,71,0.9);
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 70px 0;
        }

        .cta-section h2 {
            color: var(--color-white);
            margin-bottom: 14px;
        }

        .cta-section p {
            color: rgba(255,255,255,0.75);
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }

        /* ========== 案例卡片 ========== */
        .case-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
            height: 100%;
        }

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

        .case-card .case-img-wrap {
            position: relative;
            overflow: hidden;
            height: 200px;
        }

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

        .case-card:hover .case-img-wrap img {
            transform: scale(1.06);
        }

        .case-card .case-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--color-accent);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 16px;
            letter-spacing: 0.04em;
        }

        .case-card .case-body {
            padding: 22px 20px;
        }

        .case-card .case-body h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .case-card .case-body p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #061a2f;
            color: rgba(255,255,255,0.6);
            padding: 32px 0;
            font-size: 0.9rem;
        }

        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .footer-brand {
            font-weight: 700;
            color: var(--color-white);
            font-size: 1rem;
            letter-spacing: 0.02em;
        }

        .footer-copy {
            color: rgba(255,255,255,0.4);
            font-size: 0.85rem;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-links a {
            color: rgba(255,255,255,0.55);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }

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

        /* ========== 响应式 ========== */
        @media (max-width: 1023px) {
            :root {
                --sidebar-width: 0px;
            }

            .sidebar-desktop {
                display: none !important;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }

            .mobile-topbar {
                display: flex;
            }

            .hero-section {
                min-height: 400px;
            }

            .hero-content h1 {
                font-size: 2rem;
            }

            .hero-content .hero-desc {
                font-size: 1rem;
            }

            .section {
                padding: 48px 0;
            }

            .section-sm {
                padding: 36px 0;
            }

            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }

            .service-card {
                margin-bottom: 16px;
            }

            .step-item {
                flex-direction: column;
                gap: 14px;
                text-align: center;
                align-items: center;
            }

            .footer-inner {
                flex-direction: column;
                text-align: center;
            }

            .footer-links {
                justify-content: center;
            }
        }

        @media (max-width: 639px) {
            .hero-section {
                min-height: 340px;
            }

            .hero-content h1 {
                font-size: 1.65rem;
            }

            .hero-content {
                padding: 50px 0;
            }

            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }

            .hero-content .btn-group {
                display: flex;
                flex-direction: column;
                gap: 10px;
            }

            .service-card .card-img {
                height: 150px;
            }

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

            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }

            .accordion-title {
                font-size: 0.95rem;
                padding: 16px 18px;
            }

            .accordion-content {
                padding: 0 18px 16px;
            }
        }