/* roulang page: index */
:root {
            --primary: #2B7DE9;
            --primary-dark: #1E66C7;
            --accent: #12B886;
            --highlight: #FF9F43;
            --bg: #F4F7FB;
            --card-bg: #FFFFFF;
            --bg-alt: #EDF3FA;
            --text-main: #14213D;
            --text-secondary: #53627A;
            --text-muted: #8A99B4;
            --border: #E4EAF2;
            --dark-bg: #101B2E;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-xs: 6px;
            --shadow-sm: 0 1px 3px rgba(20, 33, 61, .05), 0 4px 12px rgba(20, 33, 61, .05);
            --shadow-hover: 0 8px 24px rgba(20, 33, 61, .10);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --spacer: 80px;
            --spacer-mobile: 48px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 15px;
            overflow-x: hidden;
            --bs-body-color: #14213D;
            --bs-primary: #2B7DE9;
            --bs-border-radius: 12px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding: 0 24px;
        }
        .section {
            padding: var(--spacer) 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        .bg-alt {
            background-color: var(--bg-alt);
        }
        .bg-white {
            background-color: #fff;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-head .title-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .section-head .title-bar::before {
            content: "";
            width: 4px;
            height: 22px;
            background: var(--primary);
            border-radius: 2px;
            display: inline-block;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
            line-height: 1.3;
        }
        .section-head .sub-title {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        .btn {
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1px solid transparent;
            transition: all .2s ease;
            min-height: 40px;
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background-color: #3a8af0;
            border-color: #3a8af0;
            color: #fff;
            box-shadow: 0 6px 16px rgba(43, 125, 233, .25);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 8px rgba(43, 125, 233, .2);
        }
        .btn-primary:focus,
        .btn-secondary:focus,
        .btn-outline:focus,
        .btn-download:focus,
        .btn-ghost:focus {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-secondary {
            background-color: #fff;
            border-color: var(--border);
            color: var(--primary);
        }
        .btn-secondary:hover {
            border-color: rgba(43, 125, 233, .35);
            background-color: var(--bg);
            color: var(--primary);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-main);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-ghost {
            background: rgba(43, 125, 233, .1);
            border: none;
            color: var(--primary);
        }
        .btn-ghost:hover {
            background: rgba(43, 125, 233, .15);
            color: var(--primary-dark);
        }
        .btn-lg {
            min-height: 48px;
            padding: 0 32px;
            font-size: 15px;
        }
        .btn svg {
            width: 16px;
            height: 16px;
        }
        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, .85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            height: 68px;
        }
        .site-header .navbar {
            height: 68px;
            padding: 0;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            text-decoration: none;
        }
        .brand-logo:hover {
            color: var(--text-main);
        }
        .brand-logo .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            margin-left: 40px;
        }
        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            position: relative;
            padding: 6px 0;
            transition: color .2s;
        }
        .nav-links a:hover {
            color: var(--text-main);
        }
        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            transition: width .2s ease;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--text-main);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }
        .cmd-search {
            position: relative;
            width: 180px;
        }
        .cmd-search .form-control {
            height: 36px;
            border-radius: 999px;
            border: 1px solid transparent;
            background: #F1F4F9;
            padding: 0 36px 0 16px;
            font-size: 13px;
            color: var(--text-main);
            transition: all .2s;
        }
        .cmd-search .form-control:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(43, 125, 233, .15);
            outline: none;
        }
        .cmd-search .search-icon {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            pointer-events: none;
        }
        .cmd-search .search-kbd {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: #E4EAF2;
            color: var(--text-secondary);
            font-size: 11px;
            border-radius: 4px;
            padding: 1px 6px;
            font-family: inherit;
            pointer-events: none;
        }
        .nav-user-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: all .2s;
        }
        .nav-user-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-cta {
            height: 36px;
            min-height: 36px;
            padding: 0 18px;
            font-size: 13px;
        }
        .navbar-toggler {
            border: none;
            padding: 8px;
            background: transparent;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .navbar-toggler:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: none;
        }
        .navbar-toggler .toggle-bar {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            margin: 4px 0;
            border-radius: 1px;
            transition: all .3s;
        }
        .navbar-toggler[aria-expanded="true"] .toggle-bar:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }
        .navbar-toggler[aria-expanded="true"] .toggle-bar:nth-child(2) {
            opacity: 0;
        }
        .navbar-toggler[aria-expanded="true"] .toggle-bar:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }
        .mobile-nav {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 20px;
        }
        .mobile-nav .nav-links-mobile {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav .nav-links-mobile a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            padding: 10px 0;
            border-bottom: 1px solid #F1F4F9;
            text-decoration: none;
        }
        .mobile-nav .nav-links-mobile a:last-child {
            border-bottom: none;
        }
        .mobile-nav .nav-actions-mobile {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        /* ===== Hero ===== */
        .hero {
            padding: 148px 0 80px;
            background-color: var(--bg);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: .08;
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-main);
            box-shadow: var(--shadow-sm);
            margin-bottom: 20px;
        }
        .hero-badge .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
        }
        .hero h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .hero-sub {
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 24px;
        }
        .hero-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .hero-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hero-figure {
            position: relative;
        }
        .hero-figure .card-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }
        .hero-figure .card-img-wrap img {
            width: 100%;
            display: block;
        }
        .hero-float-card {
            position: absolute;
            bottom: -18px;
            left: -24px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-hover);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            border: 1px solid var(--border);
        }
        .hero-float-card .version-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
        }
        /* ===== Value Cards ===== */
        .value-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform .2s ease, box-shadow .2s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .value-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 3px;
            height: 40px;
            background: var(--primary);
            border-radius: 0 2px 2px 0;
            opacity: 0;
            transition: opacity .2s;
        }
        .value-card:hover::before {
            opacity: 1;
        }
        .value-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .value-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(43, 125, 233, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .value-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .value-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        /* ===== Carousel ===== */
        .carousel-section {
            background: var(--dark-bg);
            padding: var(--spacer) 0;
        }
        .carousel-section h2 {
            color: #fff;
        }
        .carousel-section .sub-title {
            color: #A8B4C7 !important;
        }
        .carousel-section .carousel {
            max-width: 1000px;
            margin: 0 auto;
        }
        .carousel-section .carousel-item img {
            border-radius: var(--radius-lg);
            box-shadow: 0 12px 32px rgba(0, 0, 0, .3);
        }
        .carousel-caption-custom {
            text-align: center;
            color: #A8B4C7;
            font-size: 14px;
            padding-top: 16px;
        }
        .carousel-section .carousel-indicators {
            position: static;
            margin-top: 20px;
        }
        .carousel-section .carousel-indicators button {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .3);
            border: none;
            opacity: 1;
        }
        .carousel-section .carousel-indicators button.active {
            background: var(--primary);
        }
        .carousel-section .carousel-control-prev,
        .carousel-section .carousel-control-next {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .12);
            top: 50%;
            transform: translateY(-50%);
            opacity: .8;
            border: none;
        }
        .carousel-section .carousel-control-prev:hover,
        .carousel-section .carousel-control-next:hover {
            background: var(--primary);
            opacity: 1;
        }
        .carousel-section .carousel-control-prev {
            left: -20px;
        }
        .carousel-section .carousel-control-next {
            right: -20px;
        }
        /* ===== System Requirements ===== */
        .sys-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 32px;
        }
        .sys-card h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .sys-card .sub-title {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .sys-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sys-list li {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 12px;
            border-bottom: 1px solid var(--border);
            transition: background .2s;
            border-radius: 8px;
        }
        .sys-list li:last-child {
            border-bottom: none;
        }
        .sys-list li:hover {
            background: rgba(43, 125, 233, .05);
        }
        .sys-list .platform-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: rgba(43, 125, 233, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .sys-list .platform-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
        }
        .sys-list .platform-ver {
            font-size: 14px;
            color: var(--text-secondary);
            margin-left: auto;
            text-align: right;
        }
        .sys-check-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 32px;
            height: 100%;
        }
        .sys-check-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .sys-check-item {
            display: flex;
            gap: 12px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
        }
        .sys-check-item:last-child {
            border-bottom: none;
        }
        .sys-check-item .check-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(18, 184, 134, .1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .sys-check-item .check-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }
        .sys-check-item .check-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-top: 2px;
        }
        /* ===== Testimonials ===== */
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 28px;
            height: 100%;
            transition: box-shadow .2s;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .testimonial-card .stars {
            display: flex;
            gap: 2px;
            margin-bottom: 14px;
            color: var(--highlight);
        }
        .testimonial-card .stars svg {
            width: 16px;
            height: 16px;
            fill: currentColor;
        }
        .testimonial-card .testimonial-text {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 20px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-user .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
        }
        .testimonial-user .user-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }
        .testimonial-user .user-badge {
            font-size: 12px;
            color: var(--text-muted);
        }
        /* ===== Download ===== */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }
        .download-item {
            display: flex;
            align-items: center;
            gap: 14px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            min-height: 72px;
            box-shadow: var(--shadow-sm);
            transition: all .2s ease;
        }
        .download-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(43, 125, 233, .35);
        }
        .download-item .dl-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(43, 125, 233, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }
        .download-item .dl-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.3;
        }
        .download-item .dl-ver {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.3;
        }
        .main-download-btn {
            display: flex;
            justify-content: center;
            margin-top: 8px;
        }
        .main-download-btn .btn {
            min-height: 48px;
            padding: 0 36px;
            font-size: 15px;
        }
        /* ===== Post Cards ===== */
        .post-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform .2s ease, box-shadow .2s ease;
            height: 100%;
        }
        .post-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .post-thumb {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: #E4EAF2;
        }
        .post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .post-card:hover .post-thumb img {
            transform: scale(1.03);
        }
        .post-body {
            padding: 20px 24px 24px;
        }
        .post-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .badge-cat {
            display: inline-block;
            background: rgba(43, 125, 233, .08);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: var(--radius-xs);
        }
        .post-date {
            font-size: 13px;
            color: var(--text-muted);
        }
        .post-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-title a {
            color: inherit;
        }
        .post-title a:hover {
            color: var(--primary);
        }
        .post-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }
        .post-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid #F1F4F9;
            padding-top: 14px;
        }
        .post-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }
        .post-link:hover {
            color: var(--primary-dark);
        }
        .section-head-right {
            text-align: right;
        }
        .section-head-right .view-all {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .section-head-right .view-all:hover {
            color: var(--primary-dark);
        }
        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 64px 24px;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
        }
        .empty-state .empty-icon {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .empty-state p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            margin-bottom: 16px;
            overflow: hidden;
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background .2s;
        }
        .faq-item .faq-question:hover {
            background: #F8FAFC;
        }
        .faq-item .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(43, 125, 233, .1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 14px;
            font-weight: 600;
            transition: transform .2s;
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px 62px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        /* ===== CTA Banner ===== */
        .cta-banner {
            background: linear-gradient(135deg, rgba(43, 125, 233, .04), rgba(18, 184, 134, .04));
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
        }
        .cta-banner h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-banner .btn {
            min-height: 48px;
            padding: 0 36px;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark-bg);
            padding: 64px 0 0;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
        }
        .site-footer .footer-brand span {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
        }
        .site-footer p.footer-desc {
            font-size: 13px;
            color: #8A99B4;
            line-height: 1.7;
            max-width: 280px;
        }
        .site-footer h5 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul a {
            font-size: 14px;
            color: #B8C4D6;
            text-decoration: none;
            transition: color .2s;
        }
        .site-footer ul a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
            margin-top: 48px;
        }
        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: #8A99B4;
            text-align: center;
        }
        /* ===== Tag ===== */
        .tag-badge {
            display: inline-block;
            background: rgba(18, 184, 134, .1);
            color: var(--accent);
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: var(--radius-xs);
            margin-right: 8px;
        }
        .tag-badge.hot {
            background: rgba(255, 159, 67, .1);
            color: var(--highlight);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .cmd-search {
                width: 140px;
            }
            .nav-links {
                gap: 18px;
                margin-left: 24px;
            }
        }
        @media (max-width: 991.98px) {
            .section {
                padding: var(--spacer-mobile) 0;
            }
            .nav-links,
            .cmd-search,
            .nav-user-btn,
            .nav-cta.desktop-only {
                display: none;
            }
            .hero {
                padding: 120px 0 56px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero-figure {
                margin-top: 48px;
            }
            .download-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .section-head-right {
                text-align: left;
                margin-top: 8px;
            }
        }
        @media (min-width: 992px) {
            .mobile-nav {
                display: none;
            }
            .navbar-toggler {
                display: none;
            }
        }
        @media (max-width: 767.98px) {
            .hero h1 {
                font-size: 30px;
            }
            .hero-sub {
                font-size: 16px;
            }
            .hero-cta .btn {
                width: 100%;
            }
            .hero-float-card {
                left: 12px;
                bottom: -14px;
            }
            .download-grid {
                grid-template-columns: 1fr;
            }
            .cta-banner {
                padding: 40px 24px;
            }
            .carousel-section .carousel-control-prev {
                left: 0;
            }
            .carousel-section .carousel-control-next {
                right: 0;
            }
            .site-footer .row>div {
                margin-bottom: 32px;
            }
        }
        @media (max-width: 575.98px) {
            .section {
                padding: 48px 0;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .brand-logo .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .brand-logo {
                font-size: 14px;
            }
            .nav-actions {
                gap: 8px;
            }
            .nav-cta {
                padding: 0 14px;
                font-size: 12px;
            }
            .hero {
                padding: 108px 0 48px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .sys-list li {
                flex-wrap: wrap;
                gap: 10px;
            }
            .sys-list .platform-ver {
                margin-left: 0;
                text-align: left;
                width: 100%;
                padding-left: 48px;
            }
            .footer-bottom p {
                font-size: 12px;
                line-height: 1.6;
            }
        }

/* roulang page: article */
:root {
            --primary: #2B7DE9;
            --primary-dark: #1e66c8;
            --primary-light: rgba(43, 125, 233, .10);
            --accent: #12B886;
            --accent-light: rgba(18, 184, 134, .10);
            --highlight: #FF9F43;
            --highlight-light: rgba(255, 159, 67, .12);
            --bg: #F4F7FB;
            --card: #FFFFFF;
            --text: #14213D;
            --text-2: #53627A;
            --text-3: #8A99B4;
            --border: #E4EAF2;
            --dark: #101B2E;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-xs: 6px;
            --shadow-sm: 0 1px 3px rgba(20, 33, 61, .05), 0 4px 12px rgba(20, 33, 61, .05);
            --shadow-hover: 0 8px 24px rgba(20, 33, 61, .10);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --container: 1200px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            font-size: 15px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }
        .container {
            max-width: var(--container);
            padding-left: 20px;
            padding-right: 20px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, .85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            height: 68px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            width: 100%;
        }
        .site-header .navbar {
            padding: 0;
            min-height: 68px;
            flex-wrap: nowrap;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 16px;
            color: var(--text);
            white-space: nowrap;
            margin-right: 28px;
        }
        .brand-logo:hover {
            color: var(--text);
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            position: relative;
            transition: color .2s, background .2s;
        }
        .nav-links a:hover {
            color: var(--text);
            background: rgba(43, 125, 233, .04);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(.4);
            transition: opacity .2s, transform .2s;
        }
        .nav-links a:hover::after {
            opacity: 1;
            transform: scaleX(1);
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            opacity: 1;
            transform: scaleX(1);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: auto;
        }
        .cmd-search {
            position: relative;
            display: flex;
            align-items: center;
            width: 220px;
        }
        .cmd-search .search-icon {
            position: absolute;
            left: 12px;
            color: var(--text-3);
            pointer-events: none;
        }
        .cmd-search .form-control {
            height: 36px;
            border-radius: 999px;
            border: 1px solid transparent;
            background: #F1F4F9;
            padding-left: 34px;
            padding-right: 32px;
            font-size: 13px;
            color: var(--text);
            box-shadow: none;
            transition: background .2s, border-color .2s, box-shadow .2s;
        }
        .cmd-search .form-control:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43, 125, 233, .15);
        }
        .cmd-search .search-kbd {
            position: absolute;
            right: 10px;
            width: 18px;
            height: 18px;
            background: #E4EAF2;
            border-radius: 4px;
            font-size: 11px;
            color: var(--text-3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            pointer-events: none;
        }
        .nav-user-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-2);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: border-color .2s, color .2s, background .2s;
        }
        .nav-user-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-cta {
            height: 36px;
            padding: 0 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .navbar-toggler {
            border: none;
            padding: 8px;
            background: transparent;
            display: inline-flex;
            flex-direction: column;
            gap: 4px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: #F1F4F9;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(43, 125, 233, .15);
        }
        .toggle-bar {
            width: 18px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform .2s;
        }
        .navbar-toggler[aria-expanded="true"] .toggle-bar:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }
        .navbar-toggler[aria-expanded="true"] .toggle-bar:nth-child(2) {
            opacity: 0;
        }
        .navbar-toggler[aria-expanded="true"] .toggle-bar:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }
        .mobile-nav {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px 20px;
            box-shadow: var(--shadow-sm);
        }
        .nav-links-mobile {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-links-mobile a {
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-2);
        }
        .nav-links-mobile a:hover {
            background: var(--bg);
            color: var(--text);
        }
        .nav-links-mobile a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-actions-mobile {
            display: flex;
            gap: 10px;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .nav-actions-mobile .cmd-search {
            flex: 1;
            width: auto;
        }
        .nav-actions-mobile .btn {
            flex-shrink: 0;
        }
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            padding: 0 20px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            border: 1px solid transparent;
            transition: all .2s ease;
            line-height: 1;
        }
        .btn:focus,
        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(43, 125, 233, .2);
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(43, 125, 233, .25);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline-primary {
            background: #fff;
            border-color: var(--border);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            border-color: var(--primary);
            background: var(--bg);
            color: var(--primary);
        }
        .article-breadcrumb {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }
        .article-breadcrumb .breadcrumb {
            margin: 0;
            font-size: 13px;
            color: var(--text-3);
        }
        .article-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
            content: '/';
            color: var(--text-3);
            padding: 0 8px;
        }
        .article-breadcrumb .breadcrumb-item a {
            color: var(--text-3);
        }
        .article-breadcrumb .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .article-breadcrumb .breadcrumb-item.active {
            color: var(--text);
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .article-section {
            padding: 48px 0 64px;
        }
        .article-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }
        .article-header {
            text-align: left;
            margin-bottom: 28px;
        }
        .article-header h1 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -.01em;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 16px;
            font-size: 13px;
            color: var(--text-3);
            margin-bottom: 20px;
        }
        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .article-meta .meta-dot::before {
            content: '';
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: #C0C8D6;
            margin-right: 12px;
        }
        .badge-category {
            display: inline-flex;
            align-items: center;
            height: 22px;
            padding: 0 10px;
            border-radius: var(--radius-xs);
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
        }
        .article-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 36px;
            box-shadow: var(--shadow-sm);
        }
        .article-cover img {
            width: 100%;
            aspect-ratio: 16 / 7;
            object-fit: cover;
        }
        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
            word-break: break-word;
        }
        .article-content > *:last-child {
            margin-bottom: 0;
        }
        .article-content p {
            margin-bottom: 24px;
        }
        .article-content h2 {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
            margin: 36px 0 18px;
            padding-left: 12px;
            border-left: 4px solid var(--primary);
            color: var(--text);
        }
        .article-content h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
            margin: 28px 0 14px;
            color: var(--text);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg);
            padding: 18px 22px;
            border-radius: var(--radius-sm);
            margin: 24px 0;
            color: var(--text-2);
            font-size: 15px;
        }
        .article-content img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            margin: 24px 0;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 24px;
            padding-left: 1.5rem;
        }
        .article-content ul li::marker {
            color: var(--primary);
        }
        .article-content ol li::marker {
            font-weight: 600;
            color: var(--primary);
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content a {
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(43, 125, 233, .3);
        }
        .article-content a:hover {
            text-decoration-color: var(--primary);
        }
        .article-content pre {
            background: var(--dark);
            color: #E8EDF4;
            border-radius: var(--radius-md);
            padding: 20px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.7;
            margin: 24px 0;
        }
        .article-content code {
            font-family: "SF Mono", "Fira Code", "JetBrains Mono", Menlo, Consolas, monospace;
        }
        .article-content p code {
            background: rgba(43, 125, 233, .06);
            color: var(--primary-dark);
            border-radius: 4px;
            padding: 2px 6px;
            font-size: .9em;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            font-size: 14px;
        }
        .article-content table th,
        .article-content table td {
            padding: 12px 16px;
            border: 1px solid var(--border);
            text-align: left;
        }
        .article-content table th {
            background: var(--bg);
            font-weight: 600;
        }
        .article-footer-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-badge {
            display: inline-flex;
            align-items: center;
            height: 22px;
            padding: 0 10px;
            border-radius: var(--radius-xs);
            background: var(--bg);
            color: var(--text-2);
            font-size: 12px;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: background .2s, color .2s, border-color .2s;
        }
        .tag-badge:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(43, 125, 233, .2);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .share-btn {
            height: 38px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-2);
            font-size: 13px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all .2s;
            cursor: pointer;
        }
        .share-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .share-btn.copied {
            background: var(--accent-light);
            color: #0d9f71;
            border-color: rgba(18, 184, 134, .25);
        }
        .related-section {
            padding: 56px 0 64px;
            background: var(--card);
            border-top: 1px solid var(--border);
        }
        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
        }
        .related-header h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }
        .related-header .related-sub {
            font-size: 14px;
            color: var(--text-3);
        }
        .related-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .2s ease, box-shadow .2s ease;
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg);
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.03);
        }
        .related-card .card-body {
            padding: 18px;
        }
        .related-card .card-title {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-title a {
            color: var(--text);
        }
        .related-card .card-title a:hover {
            color: var(--primary);
        }
        .related-card .card-date {
            font-size: 13px;
            color: var(--text-3);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-back-row {
            max-width: 820px;
            margin: 32px auto 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
        }
        .pager-links {
            display: flex;
            gap: 12px;
        }
        .pager-links a {
            font-size: 13px;
            color: var(--text-2);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
            transition: all .2s;
        }
        .pager-links a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .not-found-wrapper {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-3);
        }
        .not-found-wrapper h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }
        .not-found-wrapper p {
            font-size: 15px;
            color: var(--text-2);
            margin-bottom: 28px;
        }
        .site-footer {
            background: var(--dark);
            color: #B8C4D6;
            padding: 64px 0 0;
            font-size: 14px;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer .logo-mark {
            background: var(--primary);
        }
        .site-footer .footer-desc {
            font-size: 13px;
            line-height: 1.8;
            color: #8A99B4;
            max-width: 320px;
            margin-bottom: 0;
        }
        .site-footer h5 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: #B8C4D6;
            font-size: 13px;
            transition: color .2s;
        }
        .site-footer ul li a:hover {
            color: var(--primary);
        }
        .site-footer .tag-badge {
            background: rgba(255, 255, 255, .06);
            color: var(--accent);
            border-color: transparent;
            border-radius: 4px;
            font-size: 11px;
            height: 20px;
            padding: 0 8px;
            margin-right: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin-top: 40px;
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #6B7A91;
        }
        .footer-bottom p {
            margin: 0;
        }
        @media (max-width: 1199.98px) {
            .cmd-search {
                width: 180px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 13px;
            }
        }
        @media (max-width: 991.98px) {
            .nav-links {
                display: none;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .site-header {
                height: 60px;
            }
            .site-header .navbar {
                min-height: 60px;
            }
            .brand-logo {
                font-size: 15px;
            }
            .article-cover img {
                aspect-ratio: 16 / 8;
            }
        }
        @media (max-width: 767.98px) {
            .article-section {
                padding: 32px 0 48px;
            }
            .article-header h1 {
                font-size: 26px;
            }
            .article-meta {
                gap: 6px 12px;
                font-size: 12px;
            }
            .article-content {
                font-size: 15px;
                line-height: 1.85;
            }
            .related-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
            .related-card .card-body {
                padding: 16px;
            }
            .article-back-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .site-footer {
                padding: 48px 0 0;
            }
            .site-footer .row > div {
                margin-bottom: 24px;
            }
            .footer-bottom {
                margin-top: 24px;
                padding: 18px 0;
            }
        }
        @media (max-width: 575.98px) {
            .brand-logo {
                font-size: 14px;
                gap: 8px;
            }
            .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 15px;
                border-radius: 8px;
            }
            .article-breadcrumb .breadcrumb-item.active {
                max-width: 160px;
            }
            .article-cover img {
                aspect-ratio: 4 / 3;
            }
            .article-footer-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .share-btn {
                flex: 1;
                justify-content: center;
            }
            .related-header .related-sub {
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2B7DE9;
            --primary-dark: #1f6fd6;
            --accent: #12B886;
            --highlight: #FF9F43;
            --bg: #F4F7FB;
            --card-bg: #FFFFFF;
            --text: #14213D;
            --text-secondary: #53627A;
            --text-muted: #8A99B4;
            --border: #E4EAF2;
            --section-alt: #EDF3FA;
            --dark: #101B2E;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(20, 33, 61, .05), 0 4px 12px rgba(20, 33, 61, .05);
            --shadow-lg: 0 8px 24px rgba(20, 33, 61, .10);
            --transition: all .2s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            padding-top: 68px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text);
            margin: 0 0 12px;
            line-height: 1.3;
        }
        h1 {
            font-size: 32px;
            font-weight: 800;
        }
        h2 {
            font-size: 24px;
            font-weight: 700;
        }
        h3 {
            font-size: 18px;
            font-weight: 600;
        }

        p {
            margin: 0 0 16px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s;
        }
        a:hover {
            color: var(--primary-dark);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .btn-lg {
            height: 48px;
            padding: 0 32px;
            border-radius: 10px;
        }
        .btn-primary {
            background-color: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(43, 125, 233, .25);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: none;
        }
        .btn-outline-secondary {
            border-color: var(--border);
            color: var(--primary);
            background: #fff;
        }
        .btn-outline-secondary:hover {
            border-color: var(--primary);
            background: #F4F7FB;
            color: var(--primary);
        }
        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 68px;
            background: rgba(255, 255, 255, .85);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
        }
        .site-header .container {
            height: 100%;
        }
        .site-header .navbar {
            height: 100%;
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
            margin-right: 28px;
        }
        .brand-logo:hover {
            color: var(--text);
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
        }
        .nav-links a {
            position: relative;
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            transition: color .2s;
        }
        .nav-links a:hover {
            color: var(--text);
            background: #f8fafc;
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .cmd-search {
            position: relative;
            width: 220px;
            display: flex;
            align-items: center;
        }
        .cmd-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-muted);
            pointer-events: none;
        }
        .cmd-search .form-control {
            height: 36px;
            border-radius: 999px;
            background: #F1F4F9;
            border: 1px solid transparent;
            padding: 0 42px 0 36px;
            font-size: 14px;
            color: var(--text);
            box-shadow: none;
            transition: var(--transition);
        }
        .cmd-search .form-control:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43, 125, 233, .15);
        }
        .cmd-search .search-kbd {
            position: absolute;
            right: 14px;
            font-size: 12px;
            color: var(--text-muted);
            background: #e9edf2;
            border-radius: 4px;
            padding: 0 6px;
            line-height: 20px;
            font-family: ui-monospace, Menlo, monospace;
        }
        .nav-user-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-user-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-cta {
            height: 36px;
            padding: 0 18px;
            border-radius: 8px;
            font-size: 14px;
        }
        .navbar-toggler {
            border: none;
            padding: 8px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            background: transparent;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .toggle-bar {
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-nav {
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 20px 24px 24px;
            z-index: 999;
        }
        .mobile-nav .nav-links-mobile {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-bottom: 16px;
        }
        .mobile-nav .nav-links-mobile a {
            padding: 10px 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
        }
        .mobile-nav .nav-links-mobile a:hover {
            background: #F4F7FB;
            color: var(--text);
        }
        .mobile-nav .nav-links-mobile a.active {
            color: var(--primary);
            background: rgba(43, 125, 233, .06);
            font-weight: 600;
        }
        .mobile-nav .nav-actions-mobile .cmd-search {
            width: 100%;
            margin-bottom: 14px;
        }
        .mobile-nav .nav-actions-mobile .desktop-only {
            width: 100%;
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            padding: 56px 0 48px;
            background-color: var(--bg);
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: .12;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero-title {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }
        .hero-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .hero-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(43, 125, 233, .08);
            border: 1px solid rgba(43, 125, 233, .18);
            border-radius: 999px;
        }
        .hero-tag .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            padding: 16px 0 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-wrap a {
            color: var(--text-muted);
        }
        .breadcrumb-wrap a:hover {
            color: var(--primary);
        }
        .breadcrumb-divider {
            margin: 0 10px;
            color: var(--text-muted);
        }
        .breadcrumb-current {
            color: var(--text);
            font-weight: 500;
        }

        /* ===== 主区 ===== */
        .category-main {
            padding: 32px 0 56px;
        }
        .content-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            margin-bottom: 24px;
        }
        .content-heading {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .content-heading::before {
            content: '';
            width: 4px;
            height: 20px;
            border-radius: 2px;
            background: var(--primary);
            flex-shrink: 0;
        }
        .content-heading h2 {
            margin: 0;
            font-size: 22px;
            font-weight: 700;
        }
        .content-sub {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .content-sub strong {
            color: var(--text);
            font-weight: 600;
        }
        .content-img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            margin: 20px 0;
            width: 100%;
            object-fit: cover;
        }
        .subsection {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }
        .subsection h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .subsection h3 svg {
            color: var(--primary);
            flex-shrink: 0;
        }
        .subsection p {
            font-size: 14.5px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .info-tip {
            display: flex;
            gap: 12px;
            padding: 16px 20px;
            background: rgba(43, 125, 233, .06);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .info-tip svg {
            color: var(--primary);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .content-visual {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin: 20px 0;
            position: relative;
            min-height: 220px;
            display: flex;
            align-items: flex-end;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
        }
        .content-visual .visual-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(16, 27, 46, 0) 30%, rgba(16, 27, 46, .75) 100%);
        }
        .content-visual .visual-text {
            position: relative;
            z-index: 1;
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            padding: 20px;
            line-height: 1.6;
        }

        /* ===== FAQ手风琴 ===== */
        .custom-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            background: #fff;
            box-shadow: 0 1px 2px rgba(20, 33, 61, .03);
        }
        .custom-accordion .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            padding: 18px 20px;
            background: #fff;
            box-shadow: none;
            border: none;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .custom-accordion .accordion-button::after {
            background-size: 14px;
            background-position: center;
            width: 14px;
            height: 14px;
            margin-left: auto;
        }
        .custom-accordion .accordion-button:not(.collapsed) {
            background: rgba(43, 125, 233, .04);
            color: var(--primary);
            box-shadow: none;
        }
        .custom-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(43, 125, 233, .12);
            border-color: transparent;
        }
        .custom-accordion .accordion-body {
            padding: 4px 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            background: #fff;
        }

        /* ===== 侧栏 ===== */
        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            margin-bottom: 24px;
        }
        .sidebar-card-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card-title svg {
            color: var(--primary);
        }
        .sidebar-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar-list li {
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 11px 4px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition);
            border-radius: 6px;
        }
        .sidebar-list a:hover {
            color: var(--primary);
            background: rgba(43, 125, 233, .03);
            padding-left: 10px;
        }
        .sidebar-list a::after {
            content: '→';
            font-size: 13px;
            color: var(--text-muted);
            opacity: 0;
            transition: opacity .2s;
        }
        .sidebar-list a:hover::after {
            opacity: 1;
            color: var(--primary);
        }
        .sidebar-service {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-service:last-child {
            border-bottom: none;
        }
        .service-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(43, 125, 233, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }
        .service-info {
            flex: 1;
        }
        .service-info .service-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }
        .service-info .service-desc {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .sidebar-contact {
            background: rgba(43, 125, 233, .05);
            border-radius: var(--radius-sm);
            padding: 16px;
            margin-top: 12px;
        }
        .sidebar-contact p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .sidebar-contact .btn {
            width: 100%;
            height: 40px;
            font-size: 14px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 56px 0;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
        }
        .cta-inner {
            background: linear-gradient(135deg, rgba(43, 125, 233, .05), rgba(18, 184, 134, .05));
            border: 1px solid rgba(43, 125, 233, .18);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: center;
        }
        .cta-inner h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-inner p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: #B8C4D6;
            padding: 56px 0 0;
            font-size: 14px;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer .footer-desc {
            font-size: 13px;
            line-height: 1.8;
            color: #8a9bb4;
            margin-bottom: 0;
            max-width: 320px;
        }
        .site-footer h5 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul a {
            color: #B8C4D6;
            font-size: 14px;
            transition: color .2s;
        }
        .site-footer ul a:hover {
            color: #fff;
        }
        .site-footer .tag-badge {
            display: inline-block;
            padding: 2px 8px;
            font-size: 11px;
            font-weight: 600;
            border-radius: 4px;
            background: rgba(18, 184, 134, .15);
            color: var(--accent);
            margin-right: 4px;
        }
        .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, .1);
            font-size: 13px;
            color: #8a9bb4;
        }
        .footer-bottom p {
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .footer-bottom span {
            opacity: .7;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .nav-links {
                display: none !important;
            }
            .nav-user-btn {
                display: none !important;
            }
            .nav-cta {
                display: none;
            }
            .desktop-only {
                display: none;
            }
            .category-hero-title {
                font-size: 30px;
            }
            .hero-tags {
                margin-top: 16px;
            }
            .content-card {
                padding: 24px;
            }
        }
        @media (min-width: 992px) {
            .navbar-toggler {
                display: none !important;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 60px;
            }
            .site-header {
                height: 60px;
            }
            .mobile-nav {
                top: 60px;
            }
            .category-hero {
                padding: 40px 0 32px;
            }
            .category-hero-title {
                font-size: 26px;
            }
            .category-main {
                padding: 24px 0 40px;
            }
            .content-card {
                padding: 20px;
            }
            .cta-inner {
                padding: 32px 20px;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-hero {
                padding: 32px 0 28px;
            }
            .category-hero-title {
                font-size: 24px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .content-visual {
                min-height: 160px;
            }
            .content-visual .visual-text {
                font-size: 13px;
                padding: 14px;
            }
            .sidebar-card {
                padding: 20px;
            }
            .footer-bottom p {
                flex-direction: column;
                gap: 4px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2B7DE9;
            --primary-dark: #1D6FD8;
            --primary-light: rgba(43, 125, 233, .10);
            --accent: #12B886;
            --accent-light: rgba(18, 184, 134, .10);
            --highlight: #FF9F43;
            --bg: #F4F7FB;
            --card-bg: #FFFFFF;
            --section-alt: #EDF3FA;
            --text: #14213D;
            --text-muted: #53627A;
            --text-light: #8A99B4;
            --border: #E4EAF2;
            --dark: #101B2E;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-xs: 6px;
            --shadow: 0 1px 3px rgba(20, 33, 61, .05), 0 4px 12px rgba(20, 33, 61, .05);
            --shadow-hover: 0 8px 24px rgba(20, 33, 61, .10);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
        }

        a:hover {
            text-decoration: none;
        }

        .container {
            max-width: 1200px;
        }

        .tag-badge {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 6px;
            line-height: 1.5;
        }

        .tag-badge.hot {
            background: rgba(255, 159, 67, .12);
            color: #E8830C;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            min-height: 68px;
        }

        .site-header .container {
            min-height: 68px;
        }

        .site-header .navbar {
            min-height: 68px;
            padding: 0;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--primary);
        }

        .brand-logo .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            margin-left: 44px;
        }

        .nav-links a {
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--text);
        }

        .nav-links a.active {
            color: var(--text);
            font-weight: 600;
        }

        .nav-links a::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .25s ease;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }

        .cmd-search {
            position: relative;
            display: flex;
            align-items: center;
            width: 220px;
            height: 36px;
            background: #F1F4F9;
            border-radius: 999px;
            padding: 0 14px;
            transition: background .2s ease, box-shadow .2s ease;
        }

        .cmd-search:focus-within {
            background: #fff;
            box-shadow: 0 0 0 2px rgba(43, 125, 233, .25), 0 2px 8px rgba(20, 33, 61, .05);
        }

        .cmd-search .search-icon {
            color: var(--text-light);
            margin-right: 8px;
            flex-shrink: 0;
        }

        .cmd-search input {
            border: none;
            background: transparent;
            font-size: 13px;
            color: var(--text);
            width: 100%;
            padding: 0;
            outline: none;
        }

        .cmd-search input::placeholder {
            color: var(--text-light);
        }

        .cmd-search .search-kbd {
            font-size: 11px;
            color: var(--text-light);
            background: rgba(255, 255, 255, .8);
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 1px 6px;
            font-weight: 500;
            flex-shrink: 0;
        }

        .nav-user-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }

        .nav-user-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .nav-cta {
            height: 36px;
            padding: 0 18px;
            font-size: 14px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .navbar-toggler {
            border: none;
            padding: 8px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            background: transparent;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(43, 125, 233, .4);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .toggle-bar {
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all .2s ease;
        }

        .mobile-nav {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 20px 0 24px;
            box-shadow: 0 12px 24px rgba(20, 33, 61, .06);
        }

        .mobile-nav .nav-links-mobile {
            display: flex;
            flex-direction: column;
            padding: 0 20px;
        }

        .mobile-nav .nav-links-mobile a {
            padding: 12px 0;
            font-size: 15px;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border);
        }

        .mobile-nav .nav-links-mobile a:last-child {
            border-bottom: none;
        }

        .mobile-nav .nav-links-mobile a:hover,
        .mobile-nav .nav-links-mobile a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .mobile-nav .nav-actions-mobile {
            padding: 16px 20px 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .mobile-nav .cmd-search {
            width: 100%;
        }

        .mobile-nav .nav-user-btn {
            display: none;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: var(--bg) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            position: relative;
            padding: 72px 0 56px;
            border-bottom: 1px solid var(--border);
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(244, 247, 251, .85);
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-content {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .hero-text {
            flex: 1;
            min-width: 280px;
        }

        .hero-text h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
            margin-bottom: 12px;
        }

        .hero-text p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .hero-badges {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            box-shadow: 0 1px 3px rgba(20, 33, 61, .03);
        }

        .hero-badge .dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
        }

        .hero-badge .dot.amber {
            background: var(--highlight);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .breadcrumb-wrap .breadcrumb {
            margin-bottom: 0;
            font-size: 13px;
            background: transparent;
        }

        .breadcrumb-wrap .breadcrumb-item a {
            color: var(--text-light);
        }

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

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

        .breadcrumb-wrap .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-light);
            content: "/";
            padding: 0 8px;
        }

        /* ===== Main Content ===== */
        .page-main {
            padding: 56px 0 72px;
        }

        .content-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow);
            padding: 32px;
            margin-bottom: 28px;
            border: 1px solid var(--border);
        }

        .content-card h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            position: relative;
            padding-left: 14px;
            line-height: 1.3;
        }

        .content-card h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            background: var(--primary);
            border-radius: 2px;
        }

        .content-card p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .content-card p:last-child {
            margin-bottom: 0;
        }

        .content-card .content-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin: 20px 0 8px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .content-card .content-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .content-card .img-caption {
            font-size: 13px;
            color: var(--text-light);
            text-align: center;
            margin-top: 8px;
            margin-bottom: 0;
        }

        .step-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin: 24px 0 8px;
            padding: 0;
            list-style: none;
        }

        .step-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            padding: 20px 16px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all .2s ease;
        }

        .step-item:hover {
            border-color: rgba(43, 125, 233, .35);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .step-num {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 10px;
        }

        .step-item h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .step-item p {
            font-size: 12px;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.5;
        }

        .info-tip {
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 18px 22px;
            margin: 28px 0 4px;
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .info-tip svg {
            flex-shrink: 0;
            margin-top: 3px;
            color: var(--primary);
        }

        .info-tip p {
            color: var(--text);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow);
            padding: 32px;
            border: 1px solid var(--border);
        }

        .faq-card h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 24px;
            position: relative;
            padding-left: 14px;
            line-height: 1.3;
        }

        .faq-card h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            background: var(--primary);
            border-radius: 2px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .2s ease;
        }

        .faq-item:last-child {
            margin-bottom: 0;
        }

        .faq-item:hover {
            border-color: rgba(43, 125, 233, .35);
        }

        .faq-q {
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #FAFCFF;
            gap: 12px;
        }

        .faq-q .faq-icon {
            color: var(--primary);
            flex-shrink: 0;
            transition: transform .25s ease;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
        }

        .faq-a {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.85;
        }

        /* ===== Sidebar ===== */
        .side-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow);
            padding: 24px;
            margin-bottom: 24px;
            border: 1px solid var(--border);
        }

        .side-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }

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

        .side-list li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
        }

        .side-list li:last-child {
            border-bottom: none;
        }

        .side-list a {
            color: var(--text-muted);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-list a:hover {
            color: var(--primary);
        }

        .side-list a .arrow {
            margin-left: auto;
            color: var(--text-light);
            font-size: 12px;
        }

        .service-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px dashed var(--border);
            align-items: flex-start;
        }

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

        .service-item .service-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .service-item h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 2px;
        }

        .service-item p {
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 4px;
            line-height: 1.5;
        }

        .service-item a {
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
        }

        .service-item a:hover {
            color: var(--primary-dark);
        }

        .contact-card {
            background: var(--primary-light);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid rgba(43, 125, 233, .15);
        }

        .contact-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
            border-bottom: none;
            padding-bottom: 0;
        }

        .contact-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .contact-card .btn {
            width: 100%;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(43, 125, 233, .2);
            filter: blur(60px);
        }

        .cta-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-hover);
            padding: 48px;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-card p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.8;
        }

        .cta-card .btn-wrap {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            height: 44px;
            padding: 0 24px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            transition: all .2s ease;
        }

        .btn-primary {
            background: var(--primary);
            border: 1px solid var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(43, 125, 233, .25);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: #fff;
            border: 1px solid var(--border);
            color: var(--primary);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: var(--bg);
            color: var(--primary);
            box-shadow: var(--shadow);
        }

        .btn:focus {
            outline: 2px solid rgba(43, 125, 233, .4);
            outline-offset: 3px;
            box-shadow: none;
        }

        .btn-lg {
            height: 48px;
            padding: 0 32px;
            font-size: 15px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: #B8C4D6;
            padding: 64px 0 0;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .site-footer .footer-brand .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: 9px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            margin-bottom: 24px;
            max-width: 280px;
        }

        .site-footer h5 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .site-footer ul li {
            padding: 5px 0;
            font-size: 13px;
            line-height: 1.7;
        }

        .site-footer ul a {
            color: #94A3B8;
            font-size: 13px;
            transition: color .2s ease;
        }

        .site-footer ul a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin-top: 40px;
            padding: 20px 0;
            text-align: left;
            font-size: 13px;
            color: #76839A;
        }

        .footer-bottom p {
            margin-bottom: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199px) {
            .nav-links {
                gap: 20px;
                margin-left: 28px;
            }

            .cmd-search {
                width: 180px;
            }
        }

        @media (max-width: 991px) {
            .nav-links {
                display: none;
            }

            .nav-actions .cmd-search,
            .nav-user-btn {
                display: none !important;
            }

            .nav-cta.desktop-only {
                display: inline-flex;
            }

            .page-hero {
                padding: 56px 0 44px;
            }

            .step-list {
                grid-template-columns: repeat(2, 1fr);
            }

            .page-main {
                padding: 40px 0 56px;
            }
        }

        @media (max-width: 767px) {
            .hero-content {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-badges {
                margin-top: 12px;
            }

            .content-card {
                padding: 24px 20px;
            }

            .faq-card {
                padding: 24px 20px;
            }

            .cta-card {
                padding: 32px 24px;
            }

            .cta-card .btn-wrap {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-card .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 575px) {
            .page-hero {
                padding: 44px 0 36px;
            }

            .hero-text h1 {
                font-size: 28px;
            }

            .hero-text p {
                font-size: 14px;
            }

            .step-list {
                grid-template-columns: 1fr;
            }

            .btn-wrap .btn {
                width: 100%;
                justify-content: center;
            }

            .footer-bottom p {
                flex-direction: column;
                gap: 4px;
            }
        }