/* roulang page: index */
:root {
            --pf-bg: #F7F6F2;
            --pf-surface: #FFFFFF;
            --pf-ink: #1D1D1B;
            --pf-muted: #5F625A;
            --pf-primary: #1A1F1A;
            --pf-accent: #FF5A3C;
            --pf-highlight: #2EC7A6;
            --pf-border: rgba(0, 0, 0, 0.06);
            --pf-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --pf-shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.14);
            --pf-radius: 14px;
            --pf-radius-lg: 20px;
            --pf-radius-sm: 8px;
            --pf-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --pf-container: 1200px;
            --pf-font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --pf-section-pad: 72px 0;
        }

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

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

        body {
            font-family: var(--pf-font-family);
            background-color: var(--pf-bg);
            color: var(--pf-ink);
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.01em;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--pf-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--pf-highlight);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--pf-container);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Header */
        .pf-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--pf-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }

        .pf-header .navbar {
            padding: 14px 0;
        }

        .pf-header .navbar-brand {
            font-weight: 800;
            font-size: 1.35rem;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .pf-header .navbar-brand .brand-icon {
            display: inline-flex;
            width: 34px;
            height: 34px;
            background: var(--pf-accent);
            border-radius: 9px;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #FFFFFF;
        }

        .pf-header .nav-link {
            color: rgba(255, 255, 255, 0.82) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: var(--pf-transition);
        }

        .pf-header .nav-link:hover,
        .pf-header .nav-link:focus {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.1);
        }

        .pf-header .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.14);
            font-weight: 600;
        }

        .pf-header .nav-cta {
            background: var(--pf-accent);
            color: #FFFFFF !important;
            border-radius: 8px;
            padding: 10px 22px !important;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
            border: none;
            white-space: nowrap;
        }

        .pf-header .nav-cta:hover {
            background: #e94b2e;
            color: #FFFFFF !important;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.4);
        }

        .pf-header .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 8px 10px;
            border-radius: 8px;
        }

        .pf-header .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Hero */
        .pf-hero {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .pf-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -160px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .pf-hero::after {
            content: '';
            position: absolute;
            bottom: -200px;
            left: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 90, 60, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .pf-hero .hero-content {
            position: relative;
            z-index: 2;
        }

        .pf-hero h1 {
            font-size: clamp(1.9rem, 4.5vw, 2.9rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 1.2rem;
        }

        .pf-hero h1 .highlight {
            color: var(--pf-highlight);
        }

        .pf-hero .hero-subtitle {
            font-size: 1.05rem;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.78);
            max-width: 580px;
            margin-bottom: 1.8rem;
        }

        .pf-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 2rem;
        }

        .pf-hero .btn-primary-cta {
            background: var(--pf-accent);
            color: #FFFFFF;
            border: none;
            border-radius: 9px;
            padding: 13px 30px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--pf-transition);
        }

        .pf-hero .btn-primary-cta:hover {
            background: #e94b2e;
            color: #FFFFFF;
            box-shadow: 0 8px 24px rgba(255, 90, 60, 0.45);
            transform: translateY(-2px);
        }

        .pf-hero .btn-outline-light-hero {
            background: transparent;
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.4);
            border-radius: 9px;
            padding: 13px 28px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--pf-transition);
        }

        .pf-hero .btn-outline-light-hero:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
        }

        .pf-hero .hero-metrics-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .pf-hero .metric-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--pf-radius);
            padding: 1.2rem 1.4rem;
            backdrop-filter: blur(8px);
        }

        .pf-hero .metric-card .metric-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--pf-highlight);
            line-height: 1.2;
        }

        .pf-hero .metric-card .metric-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 0.3rem;
        }

        .pf-hero .featured-card {
            background: #FFFFFF;
            color: var(--pf-ink);
            border-radius: var(--pf-radius-lg);
            padding: 1.6rem;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
            position: relative;
            z-index: 3;
        }

        .pf-hero .featured-card .fc-badge {
            display: inline-block;
            background: var(--pf-highlight);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 20px;
            padding: 4px 14px;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
        }

        .pf-hero .featured-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--pf-ink);
            margin-bottom: 10px;
        }

        .pf-hero .featured-card p {
            font-size: 0.93rem;
            color: var(--pf-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .pf-hero .featured-card .fc-img {
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 14px;
            aspect-ratio: 16/9;
            background: #eee;
        }

        .pf-hero .featured-card .fc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .pf-hero .featured-card .fc-link {
            font-weight: 600;
            color: var(--pf-accent);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--pf-transition);
        }

        .pf-hero .featured-card .fc-link:hover {
            color: #c93f24;
            gap: 10px;
        }

        /* Section base */
        .pf-section {
            padding: var(--pf-section-pad);
            position: relative;
        }

        .pf-section-alt {
            background: #FFFFFF;
        }

        .pf-section-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 0.6rem;
            color: var(--pf-ink);
        }

        .pf-section-subtitle {
            font-size: 1rem;
            color: var(--pf-muted);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 2rem;
        }

        .pf-section-header {
            margin-bottom: 2.5rem;
        }

        .pf-tag {
            display: inline-block;
            background: rgba(46, 199, 166, 0.12);
            color: #16997d;
            font-size: 0.78rem;
            font-weight: 700;
            border-radius: 20px;
            padding: 5px 14px;
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }

        /* Cards */
        .pf-card {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            padding: 1.6rem;
            box-shadow: var(--pf-shadow);
            transition: var(--pf-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .pf-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--pf-shadow-hover);
            border-color: rgba(46, 199, 166, 0.35);
        }

        .pf-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 14px;
            background: rgba(46, 199, 166, 0.1);
            color: #16997d;
        }

        .pf-card h3 {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--pf-ink);
            margin-bottom: 10px;
        }

        .pf-card p {
            font-size: 0.92rem;
            color: var(--pf-muted);
            line-height: 1.7;
            flex-grow: 1;
            margin-bottom: 0;
        }

        /* Table compare */
        .pf-compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: var(--pf-radius);
            overflow: hidden;
            box-shadow: var(--pf-shadow);
            background: var(--pf-surface);
        }

        .pf-compare-table th {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 14px 18px;
            font-weight: 600;
            font-size: 0.95rem;
            text-align: left;
        }

        .pf-compare-table td {
            padding: 16px 18px;
            border-bottom: 1px solid var(--pf-border);
            font-size: 0.93rem;
            color: var(--pf-ink);
            background: #FFFFFF;
        }

        .pf-compare-table tr:last-child td {
            border-bottom: none;
        }

        .pf-compare-table .highlight-col {
            background: rgba(46, 199, 166, 0.06);
        }

        .pf-compare-table .badge-yes {
            background: var(--pf-highlight);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 20px;
            padding: 3px 12px;
        }

        .pf-compare-table .badge-no {
            background: #eee;
            color: #888;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
            padding: 3px 12px;
        }

        /* Timeline */
        .pf-timeline {
            position: relative;
            padding-left: 28px;
        }

        .pf-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: #e0e0da;
            border-radius: 2px;
        }

        .pf-timeline .tl-item {
            position: relative;
            padding-bottom: 2rem;
        }

        .pf-timeline .tl-item:last-child {
            padding-bottom: 0;
        }

        .pf-timeline .tl-dot {
            position: absolute;
            left: -28px;
            top: 4px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--pf-accent);
            border: 3px solid #FFFFFF;
            box-shadow: 0 0 0 3px rgba(255, 90, 60, 0.25);
        }

        .pf-timeline .tl-date {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--pf-accent);
            letter-spacing: 0.03em;
            margin-bottom: 4px;
        }

        .pf-timeline .tl-title {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--pf-ink);
            margin-bottom: 6px;
        }

        .pf-timeline .tl-desc {
            font-size: 0.9rem;
            color: var(--pf-muted);
            line-height: 1.7;
        }

        /* List card with image */
        .pf-news-card {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            overflow: hidden;
            box-shadow: var(--pf-shadow);
            transition: var(--pf-transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

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

        .pf-news-card .nc-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #eee;
        }

        .pf-news-card .nc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--pf-transition);
        }

        .pf-news-card:hover .nc-img img {
            transform: scale(1.04);
        }

        .pf-news-card .nc-body {
            padding: 1.2rem 1.4rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .pf-news-card .nc-badge {
            display: inline-block;
            background: rgba(255, 90, 60, 0.1);
            color: #d6432a;
            font-size: 0.72rem;
            font-weight: 700;
            border-radius: 20px;
            padding: 3px 12px;
            letter-spacing: 0.03em;
            margin-bottom: 8px;
            align-self: flex-start;
        }

        .pf-news-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .pf-news-card p {
            font-size: 0.88rem;
            color: var(--pf-muted);
            line-height: 1.65;
            flex-grow: 1;
            margin-bottom: 10px;
        }

        .pf-news-card .nc-meta {
            font-size: 0.78rem;
            color: #aaa;
            display: flex;
            gap: 16px;
            border-top: 1px solid var(--pf-border);
            padding-top: 10px;
        }

        /* FAQ */
        .pf-accordion .accordion-item {
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius) !important;
            margin-bottom: 10px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            background: #FFFFFF;
        }

        .pf-accordion .accordion-button {
            background: #F9F9F6;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--pf-ink);
            padding: 16px 20px;
            border-radius: var(--pf-radius) !important;
            transition: var(--pf-transition);
        }

        .pf-accordion .accordion-button:not(.collapsed) {
            background: #FFFFFF;
            color: var(--pf-accent);
            box-shadow: none;
        }

        .pf-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--pf-highlight);
            outline-offset: -2px;
        }

        .pf-accordion .accordion-button::after {
            transition: var(--pf-transition);
        }

        .pf-accordion .accordion-body {
            background: #FFFFFF;
            font-size: 0.92rem;
            color: var(--pf-muted);
            line-height: 1.8;
            padding: 16px 20px;
            border-top: 1px solid var(--pf-border);
        }

        /* Form */
        .pf-form-card {
            background: #FFFFFF;
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius-lg);
            padding: 2rem;
            box-shadow: var(--pf-shadow);
        }

        .pf-form-card label {
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 6px;
            color: var(--pf-ink);
        }

        .pf-form-card .form-control {
            border-radius: 8px;
            border: 1px solid #ccc;
            padding: 12px 16px;
            font-size: 0.95rem;
            transition: var(--pf-transition);
        }

        .pf-form-card .form-control:focus {
            border-color: var(--pf-highlight);
            box-shadow: 0 0 0 3px rgba(46, 199, 166, 0.15);
        }

        .pf-form-card .btn-submit {
            background: var(--pf-accent);
            border: none;
            color: #FFFFFF;
            font-weight: 700;
            border-radius: 8px;
            padding: 12px 28px;
            transition: var(--pf-transition);
            font-size: 0.98rem;
        }

        .pf-form-card .btn-submit:hover {
            background: #e94b2e;
            color: #FFFFFF;
            box-shadow: 0 8px 20px rgba(255, 90, 60, 0.4);
        }

        /* Brand intro */
        .pf-brand-intro {
            background: linear-gradient(135deg, #20241F 0%, #1A1F1A 50%, #182019 100%);
            color: rgba(255, 255, 255, 0.85);
            border-radius: var(--pf-radius-lg);
            padding: 2.5rem;
            position: relative;
            overflow: hidden;
        }

        .pf-brand-intro::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.2) 0%, transparent 70%);
        }

        .pf-brand-intro h2 {
            color: #FFFFFF;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            z-index: 1;
        }

        .pf-brand-intro p {
            position: relative;
            z-index: 1;
            font-size: 0.95rem;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        /* Footer */
        .pf-footer {
            background: var(--pf-primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
            font-size: 0.88rem;
        }

        .pf-footer .footer-brand {
            font-weight: 800;
            font-size: 1.3rem;
            color: #FFFFFF;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .pf-footer .footer-brand .brand-icon {
            display: inline-flex;
            width: 34px;
            height: 34px;
            background: var(--pf-accent);
            border-radius: 9px;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #FFFFFF;
        }

        .pf-footer h5 {
            color: #FFFFFF;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 16px;
        }

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

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

        .pf-footer ul a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--pf-transition);
            font-size: 0.88rem;
        }

        .pf-footer ul a:hover {
            color: #FFFFFF;
        }

        .pf-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 36px;
            padding-top: 22px;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            align-items: center;
            justify-content: space-between;
        }

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

        .pf-footer .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* Quick answer item */
        .pf-qa-item {
            display: flex;
            gap: 14px;
            padding: 18px 0;
            border-bottom: 1px solid var(--pf-border);
        }

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

        .pf-qa-item .qa-icon {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: rgba(46, 199, 166, 0.1);
            color: #16997d;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            font-weight: 700;
        }

        .pf-qa-item h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .pf-qa-item p {
            font-size: 0.88rem;
            color: var(--pf-muted);
            line-height: 1.7;
            margin: 0;
        }

        /* Step */
        .pf-step {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 0;
        }

        .pf-step .step-num {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--pf-primary);
            color: #FFFFFF;
            font-weight: 800;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .pf-step h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .pf-step p {
            font-size: 0.9rem;
            color: var(--pf-muted);
            line-height: 1.7;
            margin: 0;
        }

        /* Badge */
        .pf-badge {
            display: inline-block;
            background: rgba(46, 199, 166, 0.12);
            color: #16997d;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 20px;
            padding: 4px 14px;
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .pf-section {
                padding: 48px 0;
            }
            .pf-hero {
                padding: 48px 0;
            }
            .pf-header .nav-cta {
                margin-top: 8px;
                display: inline-block;
            }
            .pf-header .navbar-collapse {
                background: #1A1F1A;
                border-radius: 10px;
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(255, 255, 255, 0.1);
            }
        }

        @media (max-width: 767.98px) {
            .pf-hero {
                padding: 40px 0;
            }
            .pf-hero .hero-metrics-grid {
                grid-template-columns: 1fr 1fr;
            }
            .pf-hero .featured-card {
                margin-top: 28px;
            }
            .pf-section-title {
                font-size: 1.35rem;
            }
            .pf-form-card {
                padding: 1.4rem;
            }
            .pf-brand-intro {
                padding: 1.6rem;
            }
            .pf-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .pf-hero .hero-metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .pf-hero .metric-card {
                padding: 0.9rem;
            }
            .pf-hero .metric-card .metric-value {
                font-size: 1.4rem;
            }
            .pf-hero .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .pf-hero .hero-actions .btn {
                width: 100%;
                text-align: center;
            }
            .pf-compare-table {
                font-size: 0.8rem;
            }
            .pf-compare-table th,
            .pf-compare-table td {
                padding: 10px 12px;
            }
        }

/* roulang page: category2 */
:root {
            --pf-bg: #F7F6F2;
            --pf-surface: #FFFFFF;
            --pf-ink: #1D1D1B;
            --pf-muted: #5F625A;
            --pf-primary: #1A1F1A;
            --pf-accent: #FF5A3C;
            --pf-highlight: #2EC7A6;
            --pf-border: rgba(0, 0, 0, 0.06);
            --pf-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --pf-shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.14);
            --pf-radius: 14px;
            --pf-radius-lg: 20px;
            --pf-radius-sm: 8px;
            --pf-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --pf-container: 1200px;
            --pf-font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --pf-section-pad: 72px 0;
            --pf-code-bg: #1E2420;
            --pf-code-text: #D7E3DA;
            --pf-table-head: #F0F1EC;
            --pf-step-line: #E5E6E0;
        }

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

        body {
            font-family: var(--pf-font-family);
            background-color: var(--pf-bg);
            color: var(--pf-ink);
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.01em;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--pf-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--pf-highlight);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--pf-container);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Header */
        .pf-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--pf-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }

        .pf-header .navbar {
            padding: 14px 0;
        }

        .pf-header .navbar-brand {
            font-weight: 800;
            font-size: 1.35rem;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .pf-header .navbar-brand:hover {
            color: #FFFFFF;
        }

        .pf-header .navbar-brand .brand-icon {
            display: inline-flex;
            width: 34px;
            height: 34px;
            background: var(--pf-accent);
            border-radius: 9px;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #FFFFFF;
        }

        .pf-header .nav-link {
            color: rgba(255, 255, 255, 0.82) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: var(--pf-transition);
        }

        .pf-header .nav-link:hover,
        .pf-header .nav-link:focus {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.1);
        }

        .pf-header .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.14);
            font-weight: 600;
        }

        .pf-header .nav-cta {
            background: var(--pf-accent);
            color: #FFFFFF !important;
            border-radius: 8px;
            padding: 10px 22px !important;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
            border: none;
            white-space: nowrap;
        }

        .pf-header .nav-cta:hover {
            background: #e94b2e;
            color: #FFFFFF !important;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.4);
        }

        .pf-header .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 8px 10px;
            border-radius: 8px;
        }

        .pf-header .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Docs Hero / Page Header */
        .docs-header {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 60px 0 52px;
            position: relative;
            overflow: hidden;
        }

        .docs-header::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -140px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.14) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .docs-header::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -80px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(255, 90, 60, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .docs-header .docs-header-content {
            position: relative;
            z-index: 2;
        }

        .docs-header h1 {
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .docs-header h1 .highlight {
            color: var(--pf-highlight);
        }

        .docs-header .docs-header-subtitle {
            font-size: 1.02rem;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin-bottom: 1.5rem;
        }

        .docs-search-bar {
            max-width: 560px;
            display: flex;
            gap: 10px;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--pf-radius);
            padding: 6px 6px 6px 18px;
            transition: var(--pf-transition);
        }

        .docs-search-bar:focus-within {
            border-color: var(--pf-highlight);
            box-shadow: 0 0 0 3px rgba(46, 199, 166, 0.18);
            background: rgba(255, 255, 255, 0.12);
        }

        .docs-search-bar i {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.95rem;
        }

        .docs-search-bar input {
            flex: 1;
            background: transparent;
            border: none;
            color: #FFFFFF;
            font-size: 0.95rem;
            padding: 8px 0;
            outline: none;
        }

        .docs-search-bar input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .docs-search-bar button {
            background: var(--pf-accent);
            border: none;
            color: #FFFFFF;
            border-radius: var(--pf-radius-sm);
            padding: 10px 20px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--pf-transition);
            cursor: pointer;
        }

        .docs-search-bar button:hover {
            background: #e94b2e;
            box-shadow: 0 6px 16px rgba(255, 90, 60, 0.35);
        }

        /* Directory Navigation */
        .docs-directory {
            background: var(--pf-surface);
            border-radius: var(--pf-radius-lg);
            box-shadow: var(--pf-shadow);
            padding: 24px 28px;
            margin-top: 24px;
            border: 1px solid var(--pf-border);
        }

        .docs-directory .dir-label {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--pf-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .docs-directory .dir-label i {
            color: var(--pf-accent);
        }

        .docs-directory .dir-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .docs-directory .dir-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--pf-bg);
            border: 1px solid var(--pf-border);
            border-radius: 20px;
            padding: 7px 14px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--pf-ink);
            transition: var(--pf-transition);
        }

        .docs-directory .dir-link:hover {
            background: var(--pf-primary);
            color: #FFFFFF;
            border-color: var(--pf-primary);
        }

        /* Section General */
        .pf-section {
            padding: var(--pf-section-pad);
        }

        .pf-section-alt {
            background: var(--pf-bg);
        }

        .pf-section-white {
            background: var(--pf-surface);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(46, 199, 166, 0.1);
            color: #1a8f73;
            font-size: 0.82rem;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .section-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
            color: var(--pf-ink);
        }

        .section-desc {
            color: var(--pf-muted);
            font-size: 1rem;
            line-height: 1.85;
            max-width: 700px;
            margin-bottom: 2rem;
        }

        /* Docs Card List */
        .docs-card {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
            transition: var(--pf-transition);
            height: 100%;
            padding: 24px;
            position: relative;
            overflow: hidden;
        }

        .docs-card:hover {
            box-shadow: var(--pf-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(46, 199, 166, 0.3);
        }

        .docs-card .doc-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: rgba(46, 199, 166, 0.1);
            border-radius: var(--pf-radius-sm);
            color: #1a8f73;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .docs-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
            color: var(--pf-ink);
        }

        .docs-card p {
            font-size: 0.9rem;
            color: var(--pf-muted);
            line-height: 1.75;
            margin-bottom: 14px;
        }

        .docs-card .doc-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            font-size: 0.78rem;
            color: var(--pf-muted);
        }

        .docs-card .doc-meta .badge-tag {
            background: rgba(255, 90, 60, 0.08);
            color: var(--pf-accent);
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.75rem;
        }

        .docs-card .doc-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Code Block */
        .code-block {
            background: var(--pf-code-bg);
            border-radius: var(--pf-radius);
            padding: 20px 22px;
            color: var(--pf-code-text);
            font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', monospace;
            font-size: 0.85rem;
            line-height: 1.75;
            overflow-x: auto;
            position: relative;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        .code-block .code-line {
            display: block;
            white-space: pre;
        }

        .code-block .code-comment {
            color: rgba(215, 227, 218, 0.5);
        }

        .code-block .code-cmd {
            color: var(--pf-highlight);
        }

        .code-block .copy-btn {
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: rgba(255, 255, 255, 0.7);
            border-radius: 6px;
            padding: 5px 10px;
            font-size: 0.7rem;
            cursor: pointer;
            transition: var(--pf-transition);
        }

        .code-block .copy-btn:hover {
            background: rgba(255, 255, 255, 0.22);
            color: #FFFFFF;
        }

        /* Step Guide */
        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
            position: relative;
        }

        .step-list::before {
            content: '';
            position: absolute;
            left: 19px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--pf-step-line);
        }

        .step-list .step-item {
            position: relative;
            padding-left: 56px;
            margin-bottom: 28px;
        }

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

        .step-list .step-num {
            position: absolute;
            left: 0;
            top: 2px;
            width: 40px;
            height: 40px;
            background: var(--pf-primary);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
            z-index: 2;
            border: 3px solid var(--pf-bg);
        }

        .step-list .step-item:nth-child(2) .step-num {
            background: #2a5547;
        }

        .step-list .step-item:nth-child(3) .step-num {
            background: #8a3d28;
        }

        .step-list .step-item:nth-child(4) .step-num {
            background: #1a8f73;
        }

        .step-list .step-content {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            padding: 18px 22px;
        }

        .step-list .step-content h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--pf-ink);
        }

        .step-list .step-content p {
            font-size: 0.9rem;
            color: var(--pf-muted);
            margin-bottom: 0;
            line-height: 1.75;
        }

        /* Config Table */
        .config-table-wrap {
            overflow-x: auto;
            border-radius: var(--pf-radius);
            border: 1px solid var(--pf-border);
            background: var(--pf-surface);
        }

        .config-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 640px;
        }

        .config-table thead th {
            background: var(--pf-table-head);
            color: var(--pf-ink);
            font-weight: 700;
            padding: 14px 18px;
            text-align: left;
            border-bottom: 2px solid var(--pf-border);
            white-space: nowrap;
        }

        .config-table tbody td {
            padding: 12px 18px;
            border-bottom: 1px solid var(--pf-border);
            color: var(--pf-ink);
            line-height: 1.6;
        }

        .config-table tbody tr:last-child td {
            border-bottom: none;
        }

        .config-table tbody tr:hover {
            background: rgba(46, 199, 166, 0.04);
        }

        .config-table .param-name {
            font-weight: 600;
            font-family: 'SFMono-Regular', 'Consolas', monospace;
            color: #1a8f73;
            font-size: 0.85rem;
        }

        /* FAQ Cards */
        .config-faq-item {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            padding: 20px 24px;
            transition: var(--pf-transition);
            height: 100%;
        }

        .config-faq-item:hover {
            border-color: rgba(255, 90, 60, 0.25);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.07);
        }

        .config-faq-item .faq-q {
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 8px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--pf-ink);
        }

        .config-faq-item .faq-q i {
            color: var(--pf-accent);
            font-size: 0.85rem;
            margin-top: 4px;
        }

        .config-faq-item .faq-a {
            font-size: 0.88rem;
            color: var(--pf-muted);
            line-height: 1.75;
            margin-bottom: 0;
            padding-left: 24px;
        }

        /* CTA Section */
        .docs-cta-section {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 56px 0;
            position: relative;
            overflow: hidden;
        }

        .docs-cta-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .docs-cta-section .cta-content {
            position: relative;
            z-index: 2;
        }

        .docs-cta-section h2 {
            font-size: clamp(1.4rem, 2.8vw, 1.9rem);
            font-weight: 800;
            margin-bottom: 0.6rem;
        }

        .docs-cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            max-width: 520px;
            line-height: 1.85;
            margin-bottom: 1.5rem;
        }

        .docs-cta-section .cta-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            max-width: 520px;
        }

        .docs-cta-section .cta-form input {
            flex: 1;
            min-width: 200px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--pf-radius-sm);
            padding: 12px 16px;
            color: #FFFFFF;
            font-size: 0.9rem;
            outline: none;
            transition: var(--pf-transition);
        }

        .docs-cta-section .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }

        .docs-cta-section .cta-form input:focus {
            border-color: var(--pf-highlight);
            box-shadow: 0 0 0 3px rgba(46, 199, 166, 0.2);
        }

        .docs-cta-section .cta-form button {
            background: var(--pf-accent);
            border: none;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 12px 24px;
            border-radius: var(--pf-radius-sm);
            cursor: pointer;
            transition: var(--pf-transition);
            white-space: nowrap;
        }

        .docs-cta-section .cta-form button:hover {
            background: #e94b2e;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.4);
        }

        /* Related Updates */
        .update-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            padding: 16px 20px;
            transition: var(--pf-transition);
            margin-bottom: 12px;
        }

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

        .update-item:hover {
            border-color: rgba(46, 199, 166, 0.3);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.07);
            transform: translateX(4px);
        }

        .update-item .update-badge {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(46, 199, 166, 0.1);
            color: #1a8f73;
            font-size: 0.78rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 14px;
            white-space: nowrap;
        }

        .update-item .update-info {
            flex: 1;
            min-width: 0;
        }

        .update-item .update-info h4 {
            font-size: 0.92rem;
            font-weight: 700;
            margin-bottom: 2px;
            color: var(--pf-ink);
        }

        .update-item .update-info p {
            font-size: 0.8rem;
            color: var(--pf-muted);
            margin-bottom: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .update-item .update-arrow {
            color: var(--pf-muted);
            font-size: 0.8rem;
            flex-shrink: 0;
            transition: var(--pf-transition);
        }

        .update-item:hover .update-arrow {
            color: var(--pf-accent);
            transform: translateX(3px);
        }

        /* Docs Image Decor */
        .docs-image-decor {
            border-radius: var(--pf-radius);
            overflow: hidden;
            box-shadow: var(--pf-shadow);
            border: 1px solid var(--pf-border);
        }

        .docs-image-decor img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Footer */
        .pf-footer {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 56px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .pf-footer .footer-brand {
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
            color: #FFFFFF;
        }

        .pf-footer .footer-brand .brand-icon {
            display: inline-flex;
            width: 32px;
            height: 32px;
            background: var(--pf-accent);
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: #FFFFFF;
        }

        .pf-footer h5 {
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: rgba(255, 255, 255, 0.9);
            letter-spacing: 0.02em;
        }

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

        .pf-footer ul li {
            margin-bottom: 8px;
        }

        .pf-footer ul a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.85rem;
            transition: var(--pf-transition);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .pf-footer ul a:hover {
            color: #FFFFFF;
        }

        .pf-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .pf-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .pf-footer .footer-bottom a:hover {
            color: #FFFFFF;
        }

        .pf-footer .footer-bottom .footer-links {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Responsive */
        @media (max-width: 991px) {
            :root {
                --pf-section-pad: 52px 0;
            }

            .docs-header {
                padding: 44px 0 40px;
            }

            .docs-search-bar {
                max-width: 100%;
            }

            .step-list::before {
                left: 17px;
            }

            .step-list .step-item {
                padding-left: 48px;
            }

            .step-list .step-num {
                width: 36px;
                height: 36px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 767px) {
            .docs-header {
                padding: 36px 0 32px;
            }

            .docs-header h1 {
                font-size: 1.5rem;
            }

            .docs-directory {
                padding: 18px 20px;
                margin-top: 16px;
            }

            .docs-search-bar {
                flex-wrap: wrap;
                padding: 10px;
            }

            .docs-search-bar input {
                flex: 1 1 100%;
                min-width: 100%;
            }

            .docs-search-bar button {
                flex: 1;
                padding: 10px 14px;
            }

            .pf-section {
                padding: 40px 0;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .pf-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .pf-footer .footer-bottom .footer-links {
                flex-wrap: wrap;
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .docs-header h1 {
                font-size: 1.3rem;
            }

            .docs-header .docs-header-subtitle {
                font-size: 0.9rem;
            }

            .step-list .step-item {
                padding-left: 42px;
                margin-bottom: 20px;
            }

            .step-list .step-num {
                width: 32px;
                height: 32px;
                font-size: 0.72rem;
                border-width: 2px;
            }

            .step-list::before {
                left: 15px;
            }

            .code-block {
                padding: 14px 16px;
                font-size: 0.78rem;
            }

            .config-table {
                font-size: 0.8rem;
                min-width: 520px;
            }
        }

/* roulang page: category1 */
:root {
            --pf-bg: #F7F6F2;
            --pf-surface: #FFFFFF;
            --pf-ink: #1D1D1B;
            --pf-muted: #5F625A;
            --pf-primary: #1A1F1A;
            --pf-accent: #FF5A3C;
            --pf-highlight: #2EC7A6;
            --pf-border: rgba(0, 0, 0, 0.06);
            --pf-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --pf-shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.14);
            --pf-radius: 14px;
            --pf-radius-lg: 20px;
            --pf-radius-sm: 8px;
            --pf-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --pf-container: 1200px;
            --pf-font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --pf-section-pad: 72px 0;
        }

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

        body {
            font-family: var(--pf-font-family);
            background-color: var(--pf-bg);
            color: var(--pf-ink);
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.01em;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--pf-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--pf-highlight);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--pf-container);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Header */
        .pf-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--pf-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }

        .pf-header .navbar {
            padding: 14px 0;
        }

        .pf-header .navbar-brand {
            font-weight: 800;
            font-size: 1.35rem;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .pf-header .navbar-brand .brand-icon {
            display: inline-flex;
            width: 34px;
            height: 34px;
            background: var(--pf-accent);
            border-radius: 9px;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #FFFFFF;
        }

        .pf-header .nav-link {
            color: rgba(255, 255, 255, 0.82) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: var(--pf-transition);
        }

        .pf-header .nav-link:hover,
        .pf-header .nav-link:focus {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.1);
        }

        .pf-header .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.14);
            font-weight: 600;
        }

        .pf-header .nav-cta {
            background: var(--pf-accent);
            color: #FFFFFF !important;
            border-radius: 8px;
            padding: 10px 22px !important;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
            border: none;
            white-space: nowrap;
        }

        .pf-header .nav-cta:hover {
            background: #e94b2e;
            color: #FFFFFF !important;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.4);
        }

        .pf-header .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 8px 10px;
            border-radius: 8px;
        }

        .pf-header .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Page Banner */
        .pf-banner {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .pf-banner::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -140px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .pf-banner::after {
            content: '';
            position: absolute;
            bottom: -180px;
            left: -80px;
            width: 440px;
            height: 440px;
            background: radial-gradient(circle, rgba(255, 90, 60, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .pf-banner .banner-content {
            position: relative;
            z-index: 2;
        }

        .pf-banner .breadcrumb {
            margin-bottom: 16px;
            --bs-breadcrumb-divider-color: rgba(255, 255, 255, 0.4);
        }

        .pf-banner .breadcrumb-item a {
            color: rgba(255, 255, 255, 0.7);
        }

        .pf-banner .breadcrumb-item a:hover {
            color: var(--pf-highlight);
        }

        .pf-banner .breadcrumb-item.active {
            color: rgba(255, 255, 255, 0.5);
        }

        .pf-banner h1 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 1rem;
        }

        .pf-banner h1 .highlight {
            color: var(--pf-highlight);
        }

        .pf-banner .banner-desc {
            font-size: 1.02rem;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.72);
            max-width: 680px;
        }

        /* Section common */
        .pf-section {
            padding: var(--pf-section-pad);
        }

        .pf-section-alt {
            background: #EFEDE6;
        }

        .pf-section-title {
            font-size: clamp(1.5rem, 3vw, 1.9rem);
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .pf-section-sub {
            font-size: 1rem;
            color: var(--pf-muted);
            max-width: 720px;
            margin-bottom: 2.2rem;
            line-height: 1.8;
        }

        /* Filter bar */
        .pf-filter-bar {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            padding: 18px 24px;
            box-shadow: var(--pf-shadow);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 16px;
            margin-bottom: 36px;
        }

        .pf-filter-bar .filter-label {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--pf-muted);
            white-space: nowrap;
        }

        .pf-filter-bar .btn-filter {
            border: 1px solid #D5D3CB;
            background: transparent;
            color: var(--pf-ink);
            border-radius: 20px;
            padding: 6px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--pf-transition);
            white-space: nowrap;
        }

        .pf-filter-bar .btn-filter:hover,
        .pf-filter-bar .btn-filter.active {
            background: var(--pf-primary);
            color: #FFFFFF;
            border-color: var(--pf-primary);
        }

        .pf-filter-bar .btn-filter.active {
            background: var(--pf-highlight);
            border-color: var(--pf-highlight);
            color: var(--pf-primary);
        }

        /* Download cards */
        .pf-download-card {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            overflow: hidden;
            box-shadow: var(--pf-shadow);
            transition: var(--pf-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .pf-download-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--pf-shadow-hover);
            border-color: rgba(46, 199, 166, 0.35);
        }

        .pf-download-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #E9E7E0;
        }

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

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

        .pf-download-card .badge-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--pf-accent);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            z-index: 2;
        }

        .pf-download-card .badge-tag.lts {
            background: var(--pf-highlight);
            color: var(--pf-primary);
        }

        .pf-download-card .badge-tag.beta {
            background: #F0A030;
            color: #FFFFFF;
        }

        .pf-download-card .card-body {
            padding: 22px 22px 20px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .pf-download-card .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .pf-download-card .card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            font-size: 0.82rem;
            color: var(--pf-muted);
            margin-bottom: 12px;
        }

        .pf-download-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .pf-download-card .card-desc {
            font-size: 0.9rem;
            color: var(--pf-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .pf-download-card .btn-download {
            background: var(--pf-accent);
            color: #FFFFFF;
            border: none;
            border-radius: var(--pf-radius-sm);
            padding: 10px 20px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--pf-transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
            width: 100%;
        }

        .pf-download-card .btn-download:hover {
            background: #e94b2e;
            color: #FFFFFF;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.35);
        }

        .pf-download-card .btn-download.outline {
            background: transparent;
            border: 1px solid var(--pf-ink);
            color: var(--pf-ink);
        }

        .pf-download-card .btn-download.outline:hover {
            background: var(--pf-primary);
            color: #FFFFFF;
            border-color: var(--pf-primary);
            box-shadow: none;
        }

        /* Checksum table */
        .pf-checksum-table {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            overflow: hidden;
            box-shadow: var(--pf-shadow);
        }

        .pf-checksum-table .table {
            margin-bottom: 0;
            font-size: 0.85rem;
        }

        .pf-checksum-table .table thead th {
            background: var(--pf-primary);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 0.82rem;
            padding: 14px 18px;
            border: none;
            white-space: nowrap;
        }

        .pf-checksum-table .table tbody td {
            padding: 14px 18px;
            border-color: var(--pf-border);
            vertical-align: middle;
            font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
            font-size: 0.78rem;
            word-break: break-all;
        }

        .pf-checksum-table .table tbody tr:hover {
            background: #FAFAF7;
        }

        .pf-checksum-table .checksum-note {
            padding: 14px 18px;
            background: #FAFAF7;
            border-top: 1px solid var(--pf-border);
            font-size: 0.85rem;
            color: var(--pf-muted);
        }

        /* Guide steps */
        .pf-step-item {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            padding: 24px 20px;
            text-align: center;
            height: 100%;
            box-shadow: var(--pf-shadow);
            transition: var(--pf-transition);
            position: relative;
        }

        .pf-step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--pf-shadow-hover);
        }

        .pf-step-item .step-num {
            display: inline-flex;
            width: 44px;
            height: 44px;
            background: var(--pf-primary);
            color: #FFFFFF;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.15rem;
            margin-bottom: 14px;
        }

        .pf-step-item .step-title {
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .pf-step-item .step-desc {
            font-size: 0.85rem;
            color: var(--pf-muted);
            line-height: 1.65;
        }

        /* History table */
        .pf-history-table {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            overflow: hidden;
            box-shadow: var(--pf-shadow);
        }

        .pf-history-table .table {
            margin-bottom: 0;
            font-size: 0.85rem;
        }

        .pf-history-table .table thead th {
            background: var(--pf-primary);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 0.82rem;
            padding: 14px 18px;
            border: none;
            white-space: nowrap;
        }

        .pf-history-table .table tbody td {
            padding: 12px 18px;
            border-color: var(--pf-border);
            vertical-align: middle;
            font-size: 0.85rem;
        }

        .pf-history-table .table tbody tr:hover {
            background: #FAFAF7;
        }

        .pf-history-table .badge-version {
            background: #E9E7E0;
            color: var(--pf-ink);
            font-weight: 600;
            font-size: 0.78rem;
            padding: 3px 10px;
            border-radius: 6px;
        }

        .pf-history-table .btn-link-download {
            color: var(--pf-accent);
            font-weight: 600;
            font-size: 0.82rem;
            white-space: nowrap;
        }

        .pf-history-table .btn-link-download:hover {
            color: #e94b2e;
            text-decoration: underline;
        }

        /* CTA section */
        .pf-cta-section {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
            border-radius: var(--pf-radius-lg);
            margin: 0 24px 72px;
            max-width: var(--pf-container);
            margin-left: auto;
            margin-right: auto;
        }

        .pf-cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background: url('/assets/images/e6eee0c68af77e78.webp') center/cover no-repeat;
            opacity: 0.18;
            pointer-events: none;
        }

        .pf-cta-section .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 24px 32px;
        }

        .pf-cta-section h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .pf-cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.72);
            max-width: 620px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }

        .pf-cta-section .btn-cta-big {
            background: var(--pf-accent);
            color: #FFFFFF;
            border: none;
            border-radius: var(--pf-radius-sm);
            padding: 14px 36px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--pf-transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .pf-cta-section .btn-cta-big:hover {
            background: #e94b2e;
            color: #FFFFFF;
            box-shadow: 0 8px 24px rgba(255, 90, 60, 0.45);
            transform: translateY(-2px);
        }

        /* Resource cards */
        .pf-resource-card {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            padding: 22px;
            height: 100%;
            box-shadow: var(--pf-shadow);
            transition: var(--pf-transition);
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .pf-resource-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--pf-shadow-hover);
            border-color: rgba(46, 199, 166, 0.3);
        }

        .pf-resource-card .res-icon {
            display: inline-flex;
            width: 46px;
            height: 46px;
            background: rgba(46, 199, 166, 0.12);
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #20A88B;
            flex-shrink: 0;
        }

        .pf-resource-card .res-title {
            font-weight: 700;
            font-size: 0.98rem;
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .pf-resource-card .res-desc {
            font-size: 0.83rem;
            color: var(--pf-muted);
            line-height: 1.65;
            margin-bottom: 8px;
        }

        .pf-resource-card .res-link {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--pf-accent);
        }

        .pf-resource-card .res-link:hover {
            color: #e94b2e;
            text-decoration: underline;
        }

        /* Footer */
        .pf-footer {
            background: var(--pf-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 28px;
            margin-top: 24px;
        }

        .pf-footer .footer-brand {
            font-weight: 800;
            font-size: 1.2rem;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .pf-footer .footer-brand .brand-icon {
            display: inline-flex;
            width: 32px;
            height: 32px;
            background: var(--pf-accent);
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: #FFFFFF;
        }

        .pf-footer h5 {
            color: #FFFFFF;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

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

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

        .pf-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: var(--pf-transition);
        }

        .pf-footer ul li a:hover {
            color: var(--pf-highlight);
        }

        .pf-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 36px;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 24px;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .pf-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .pf-footer .footer-bottom a:hover {
            color: var(--pf-highlight);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .pf-section {
                padding: 52px 0;
            }
            .pf-banner {
                padding: 44px 0 40px;
            }
            .pf-cta-section {
                margin: 0 16px 52px;
                border-radius: 16px;
            }
        }

        @media (max-width: 767.98px) {
            .pf-section {
                padding: 40px 0;
            }
            .pf-banner {
                padding: 36px 0 32px;
            }
            .pf-banner h1 {
                font-size: 1.6rem;
            }
            .pf-filter-bar {
                padding: 14px 16px;
                gap: 8px 12px;
            }
            .pf-filter-bar .btn-filter {
                padding: 5px 14px;
                font-size: 0.78rem;
            }
            .pf-cta-section {
                margin: 0 8px 40px;
                padding: 44px 0;
                border-radius: 12px;
            }
            .pf-cta-section .cta-content {
                padding: 16px 20px;
            }
            .pf-footer {
                padding: 40px 0 20px;
            }
            .pf-footer .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .pf-header .navbar {
                padding: 10px 0;
            }
            .pf-header .navbar-brand {
                font-size: 1.15rem;
            }
            .pf-header .navbar-brand .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }
            .pf-banner h1 {
                font-size: 1.4rem;
            }
            .pf-banner .banner-desc {
                font-size: 0.9rem;
            }
            .pf-section-title {
                font-size: 1.35rem;
            }
            .pf-download-card .card-body {
                padding: 16px 16px 18px;
            }
            .pf-download-card .card-title {
                font-size: 1rem;
            }
            .pf-checksum-table .table thead th,
            .pf-checksum-table .table tbody td {
                padding: 10px 12px;
                font-size: 0.7rem;
            }
            .pf-history-table .table thead th,
            .pf-history-table .table tbody td {
                padding: 9px 12px;
                font-size: 0.75rem;
            }
            .pf-step-item {
                padding: 18px 16px;
            }
            .pf-step-item .step-num {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
        }

/* roulang page: category3 */
:root {
            --pf-bg: #F7F6F2;
            --pf-surface: #FFFFFF;
            --pf-ink: #1D1D1B;
            --pf-muted: #5F625A;
            --pf-primary: #1A1F1A;
            --pf-accent: #FF5A3C;
            --pf-highlight: #2EC7A6;
            --pf-border: rgba(0, 0, 0, 0.06);
            --pf-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --pf-shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.14);
            --pf-radius: 14px;
            --pf-radius-lg: 20px;
            --pf-radius-sm: 8px;
            --pf-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --pf-container: 1200px;
            --pf-font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --pf-section-pad: 72px 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--pf-font-family);
            background-color: var(--pf-bg);
            color: var(--pf-ink);
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.01em;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--pf-transition);
        }
        a:hover {
            color: var(--pf-accent);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--pf-highlight);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--pf-container);
            padding-left: 24px;
            padding-right: 24px;
        }
        /* Header */
        .pf-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--pf-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .pf-header .navbar {
            padding: 14px 0;
        }
        .pf-header .navbar-brand {
            font-weight: 800;
            font-size: 1.35rem;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .pf-header .navbar-brand .brand-icon {
            display: inline-flex;
            width: 34px;
            height: 34px;
            background: var(--pf-accent);
            border-radius: 9px;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #FFFFFF;
        }
        .pf-header .nav-link {
            color: rgba(255, 255, 255, 0.82) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: var(--pf-transition);
        }
        .pf-header .nav-link:hover,
        .pf-header .nav-link:focus {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.1);
        }
        .pf-header .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.14);
            font-weight: 600;
        }
        .pf-header .nav-cta {
            background: var(--pf-accent);
            color: #FFFFFF !important;
            border-radius: 8px;
            padding: 10px 22px !important;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
            border: none;
            white-space: nowrap;
        }
        .pf-header .nav-cta:hover {
            background: #e94b2e;
            color: #FFFFFF !important;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.4);
        }
        .pf-header .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 8px 10px;
            border-radius: 8px;
        }
        .pf-header .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        /* Page header for category */
        .pf-page-hero {
            background: var(--pf-primary);
            color: #FFFFFF;
            padding: 56px 0 44px;
            position: relative;
            overflow: hidden;
        }
        .pf-page-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -120px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .pf-page-hero::after {
            content: '';
            position: absolute;
            bottom: -140px;
            left: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(255, 90, 60, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .pf-page-hero .page-hero-content {
            position: relative;
            z-index: 2;
        }
        .pf-page-hero h1 {
            font-size: clamp(1.7rem, 3.5vw, 2.5rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 0.8rem;
        }
        .pf-page-hero .page-subtitle {
            font-size: 1rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            max-width: 620px;
            margin-bottom: 0;
        }
        .pf-page-hero .hero-badge {
            display: inline-block;
            background: rgba(46, 199, 166, 0.18);
            color: var(--pf-highlight);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 1rem;
            border: 1px solid rgba(46, 199, 166, 0.3);
        }
        /* Section base */
        .pf-section {
            padding: var(--pf-section-pad);
        }
        .pf-section-alt {
            background: #EFEEEA;
        }
        .pf-section-tight {
            padding: 48px 0;
        }
        .pf-section-heading {
            margin-bottom: 2.2rem;
        }
        .pf-section-heading h2 {
            font-size: clamp(1.4rem, 2.5vw, 1.8rem);
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 0.6rem;
            letter-spacing: -0.01em;
        }
        .pf-section-heading p {
            color: var(--pf-muted);
            font-size: 1rem;
            max-width: 680px;
            margin-bottom: 0;
        }
        .pf-section-heading .section-line {
            width: 48px;
            height: 4px;
            background: var(--pf-accent);
            border-radius: 4px;
            margin-bottom: 1rem;
        }
        /* Filter buttons */
        .pf-filter-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 2rem;
        }
        .pf-filter-btn {
            background: var(--pf-surface);
            border: 1px solid rgba(0, 0, 0, 0.1);
            color: var(--pf-ink);
            border-radius: 30px;
            padding: 9px 22px;
            font-size: 0.92rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--pf-transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .pf-filter-btn:hover {
            border-color: var(--pf-accent);
            color: var(--pf-accent);
            background: #FFF8F6;
        }
        .pf-filter-btn.active {
            background: var(--pf-primary);
            color: #FFFFFF;
            border-color: var(--pf-primary);
        }
        /* Version highlight card */
        .pf-highlight-card {
            background: var(--pf-surface);
            border-radius: var(--pf-radius-lg);
            box-shadow: var(--pf-shadow);
            overflow: hidden;
            border: 1px solid var(--pf-border);
            transition: var(--pf-transition);
        }
        .pf-highlight-card:hover {
            box-shadow: var(--pf-shadow-hover);
        }
        .pf-highlight-card .highlight-img {
            height: 100%;
            min-height: 260px;
            object-fit: cover;
            width: 100%;
        }
        .pf-highlight-card .highlight-body {
            padding: 2rem;
        }
        .pf-highlight-card .version-tag {
            display: inline-block;
            background: var(--pf-accent);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.85rem;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 0.8rem;
        }
        .pf-highlight-card .highlight-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        .pf-highlight-card .highlight-desc {
            color: var(--pf-muted);
            margin-bottom: 1rem;
        }
        .pf-highlight-card .highlight-list {
            padding-left: 1.2rem;
            margin-bottom: 1.2rem;
        }
        .pf-highlight-card .highlight-list li {
            margin-bottom: 0.5rem;
            color: var(--pf-ink);
            font-size: 0.95rem;
        }
        /* Changelog entry cards */
        .pf-changelog-entry {
            background: var(--pf-surface);
            border-radius: var(--pf-radius);
            box-shadow: var(--pf-shadow);
            border: 1px solid var(--pf-border);
            padding: 1.6rem 1.8rem;
            margin-bottom: 1.2rem;
            transition: var(--pf-transition);
            position: relative;
        }
        .pf-changelog-entry:hover {
            box-shadow: var(--pf-shadow-hover);
            border-color: rgba(46, 199, 166, 0.3);
        }
        .pf-changelog-entry .entry-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin-bottom: 0.9rem;
        }
        .pf-changelog-entry .entry-version {
            background: var(--pf-primary);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 5px 16px;
            border-radius: 6px;
            letter-spacing: 0.03em;
        }
        .pf-changelog-entry .entry-date {
            color: var(--pf-muted);
            font-size: 0.88rem;
        }
        .pf-changelog-entry .entry-badge {
            background: rgba(46, 199, 166, 0.15);
            color: #1a9c7d;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 4px;
        }
        .pf-changelog-entry .entry-badge.important {
            background: rgba(255, 90, 60, 0.12);
            color: var(--pf-accent);
        }
        .pf-changelog-entry .entry-list {
            padding-left: 1.2rem;
            margin-bottom: 0;
        }
        .pf-changelog-entry .entry-list li {
            margin-bottom: 0.45rem;
            font-size: 0.95rem;
            line-height: 1.7;
        }
        /* Compatibility table */
        .pf-compat-table {
            background: var(--pf-surface);
            border-radius: var(--pf-radius);
            box-shadow: var(--pf-shadow);
            overflow: hidden;
            border: 1px solid var(--pf-border);
        }
        .pf-compat-table .table {
            margin-bottom: 0;
        }
        .pf-compat-table .table thead th {
            background: var(--pf-primary);
            color: #FFFFFF;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            padding: 14px 18px;
            white-space: nowrap;
        }
        .pf-compat-table .table tbody td {
            padding: 13px 18px;
            font-size: 0.92rem;
            border-color: rgba(0, 0, 0, 0.05);
            vertical-align: middle;
        }
        .pf-compat-table .table tbody tr:hover td {
            background: #FAFAF8;
        }
        .pf-compat-badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .pf-compat-badge.full {
            background: rgba(46, 199, 166, 0.15);
            color: #1a9c7d;
        }
        .pf-compat-badge.partial {
            background: rgba(255, 200, 0, 0.15);
            color: #a67c00;
        }
        .pf-compat-badge.testing {
            background: rgba(255, 90, 60, 0.12);
            color: var(--pf-accent);
        }
        /* Archive list */
        .pf-archive-list {
            background: var(--pf-surface);
            border-radius: var(--pf-radius);
            box-shadow: var(--pf-shadow);
            border: 1px solid var(--pf-border);
            overflow: hidden;
        }
        .pf-archive-list .archive-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding: 14px 20px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: var(--pf-transition);
            cursor: pointer;
        }
        .pf-archive-list .archive-item:last-child {
            border-bottom: none;
        }
        .pf-archive-list .archive-item:hover {
            background: #FAFAF8;
        }
        .pf-archive-list .archive-version {
            font-weight: 600;
            font-size: 0.95rem;
        }
        .pf-archive-list .archive-date {
            color: var(--pf-muted);
            font-size: 0.85rem;
        }
        .pf-archive-list .archive-link {
            color: var(--pf-accent);
            font-size: 0.88rem;
            font-weight: 500;
        }
        /* Subscribe CTA */
        .pf-subscribe-cta {
            background: var(--pf-primary);
            border-radius: var(--pf-radius-lg);
            padding: 3rem 2.5rem;
            position: relative;
            overflow: hidden;
            color: #FFFFFF;
        }
        .pf-subscribe-cta::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .pf-subscribe-cta .subscribe-content {
            position: relative;
            z-index: 2;
        }
        .pf-subscribe-cta h2 {
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }
        .pf-subscribe-cta p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 1.2rem;
            max-width: 520px;
        }
        .pf-subscribe-cta .subscribe-form {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .pf-subscribe-cta .subscribe-form input {
            flex: 1;
            min-width: 240px;
            padding: 12px 18px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
            font-size: 0.95rem;
            transition: var(--pf-transition);
        }
        .pf-subscribe-cta .subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }
        .pf-subscribe-cta .subscribe-form input:focus {
            border-color: var(--pf-highlight);
            background: rgba(255, 255, 255, 0.12);
            box-shadow: 0 0 0 3px rgba(46, 199, 166, 0.15);
        }
        .pf-subscribe-cta .btn-subscribe {
            background: var(--pf-accent);
            color: #FFFFFF;
            border: none;
            border-radius: 8px;
            padding: 12px 28px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
            white-space: nowrap;
        }
        .pf-subscribe-cta .btn-subscribe:hover {
            background: #e94b2e;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.4);
        }
        /* Footer */
        .pf-footer {
            background: var(--pf-primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            font-size: 0.9rem;
        }
        .pf-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.25rem;
            color: #FFFFFF;
            margin-bottom: 1rem;
        }
        .pf-footer .footer-brand .brand-icon {
            display: inline-flex;
            width: 32px;
            height: 32px;
            background: var(--pf-accent);
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: #FFFFFF;
        }
        .pf-footer h5 {
            color: #FFFFFF;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .pf-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .pf-footer ul li {
            margin-bottom: 0.6rem;
        }
        .pf-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: var(--pf-transition);
        }
        .pf-footer ul li a:hover {
            color: var(--pf-highlight);
        }
        .pf-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .pf-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .pf-footer .footer-bottom a:hover {
            color: var(--pf-highlight);
        }
        /* Responsive */
        @media (max-width: 991px) {
            :root {
                --pf-section-pad: 52px 0;
            }
            .pf-highlight-card .highlight-img {
                min-height: 200px;
            }
            .pf-subscribe-cta {
                padding: 2rem 1.5rem;
            }
        }
        @media (max-width: 767px) {
            :root {
                --pf-section-pad: 40px 0;
            }
            .pf-page-hero {
                padding: 40px 0 32px;
            }
            .pf-highlight-card .highlight-img {
                min-height: 160px;
            }
            .pf-highlight-card .highlight-body {
                padding: 1.4rem;
            }
            .pf-changelog-entry {
                padding: 1.2rem 1.3rem;
            }
            .pf-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .pf-filter-btn {
                padding: 7px 16px;
                font-size: 0.85rem;
            }
            .pf-compat-table .table thead th,
            .pf-compat-table .table tbody td {
                padding: 10px 12px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 520px) {
            .pf-changelog-entry .entry-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .pf-subscribe-cta .subscribe-form input {
                min-width: 100%;
            }
            .pf-subscribe-cta .btn-subscribe {
                width: 100%;
            }
        }

/* roulang page: category4 */
:root {
            --pf-bg: #F7F6F2;
            --pf-surface: #FFFFFF;
            --pf-ink: #1D1D1B;
            --pf-muted: #5F625A;
            --pf-primary: #1A1F1A;
            --pf-accent: #FF5A3C;
            --pf-highlight: #2EC7A6;
            --pf-border: rgba(0, 0, 0, 0.06);
            --pf-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --pf-shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.14);
            --pf-radius: 14px;
            --pf-radius-lg: 20px;
            --pf-radius-sm: 8px;
            --pf-transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --pf-container: 1200px;
            --pf-font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --pf-section-pad: 72px 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--pf-font-family);
            background-color: var(--pf-bg);
            color: var(--pf-ink);
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.01em;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--pf-transition);
        }
        a:hover {
            color: var(--pf-accent);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--pf-highlight);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--pf-container);
            padding-left: 24px;
            padding-right: 24px;
        }
        .pf-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--pf-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .pf-header .navbar {
            padding: 14px 0;
        }
        .pf-header .navbar-brand {
            font-weight: 800;
            font-size: 1.35rem;
            color: #FFFFFF;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .pf-header .navbar-brand .brand-icon {
            display: inline-flex;
            width: 34px;
            height: 34px;
            background: var(--pf-accent);
            border-radius: 9px;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #FFFFFF;
        }
        .pf-header .nav-link {
            color: rgba(255, 255, 255, 0.82) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: var(--pf-transition);
        }
        .pf-header .nav-link:hover,
        .pf-header .nav-link:focus {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.1);
        }
        .pf-header .nav-link.active {
            color: #FFFFFF !important;
            background: rgba(255, 255, 255, 0.14);
            font-weight: 600;
        }
        .pf-header .nav-cta {
            background: var(--pf-accent);
            color: #FFFFFF !important;
            border-radius: 8px;
            padding: 10px 22px !important;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
            border: none;
            white-space: nowrap;
        }
        .pf-header .nav-cta:hover {
            background: #e94b2e;
            color: #FFFFFF !important;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.4);
        }
        .pf-header .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 8px 10px;
            border-radius: 8px;
        }
        .pf-header .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .pf-hero-faq {
            background: var(--pf-surface);
            padding: 64px 0 48px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--pf-border);
        }
        .pf-hero-faq::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -120px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .pf-hero-faq::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 90, 60, 0.08) 0%, transparent 72%);
            border-radius: 50%;
            pointer-events: none;
        }
        .pf-hero-faq .hero-content {
            position: relative;
            z-index: 2;
        }
        .pf-hero-faq h1 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: var(--pf-ink);
        }
        .pf-hero-faq h1 .highlight {
            color: var(--pf-accent);
        }
        .pf-hero-faq .hero-subtitle {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--pf-muted);
            max-width: 640px;
            margin-bottom: 1.5rem;
        }
        .pf-hero-faq .search-box {
            max-width: 560px;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .pf-hero-faq .search-box .form-control {
            flex: 1;
            min-width: 220px;
            border: 1px solid #d8d6d0;
            border-radius: var(--pf-radius-sm);
            padding: 12px 16px;
            font-size: 0.95rem;
            background: #fff;
            color: var(--pf-ink);
            transition: var(--pf-transition);
            box-shadow: none;
        }
        .pf-hero-faq .search-box .form-control:focus {
            border-color: var(--pf-highlight);
            box-shadow: 0 0 0 3px rgba(46, 199, 166, 0.15);
            outline: none;
        }
        .pf-hero-faq .search-box .btn-search {
            background: var(--pf-accent);
            color: #fff;
            border: none;
            border-radius: var(--pf-radius-sm);
            padding: 12px 24px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
            white-space: nowrap;
        }
        .pf-hero-faq .search-box .btn-search:hover {
            background: #e94b2e;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.35);
        }
        .pf-anchor-nav {
            padding: 40px 0 20px;
            background: var(--pf-bg);
        }
        .pf-anchor-nav .anchor-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: flex-start;
        }
        .pf-anchor-nav .anchor-pill {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 20px;
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--pf-ink);
            transition: var(--pf-transition);
        }
        .pf-anchor-nav .anchor-pill:hover {
            border-color: var(--pf-highlight);
            color: var(--pf-highlight);
            background: rgba(46, 199, 166, 0.06);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
        }
        .pf-anchor-nav .anchor-pill i {
            color: var(--pf-accent);
            font-size: 0.8rem;
        }
        .pf-faq-section {
            padding: 40px 0 64px;
            background: var(--pf-bg);
        }
        .pf-faq-section .faq-category-block {
            margin-bottom: 48px;
        }
        .pf-faq-section .faq-category-block:last-child {
            margin-bottom: 0;
        }
        .pf-faq-section .faq-category-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--pf-ink);
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--pf-border);
        }
        .pf-faq-section .faq-category-title .cat-icon {
            display: inline-flex;
            width: 38px;
            height: 38px;
            background: var(--pf-primary);
            color: var(--pf-highlight);
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
        }
        .accordion-item {
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--pf-surface);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            transition: var(--pf-transition);
        }
        .accordion-item:hover {
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .accordion-button {
            background: var(--pf-surface);
            color: var(--pf-ink);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 22px;
            border: none;
            border-radius: var(--pf-radius) !important;
            transition: var(--pf-transition);
            box-shadow: none !important;
            position: relative;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(46, 199, 166, 0.06);
            color: var(--pf-ink);
        }
        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231D1D1B'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            transition: transform 0.3s ease;
            margin-left: auto;
            flex-shrink: 0;
        }
        .accordion-button:not(.collapsed)::after {
            transform: rotate(-180deg);
        }
        .accordion-button .faq-q-icon {
            display: inline-flex;
            width: 28px;
            height: 28px;
            background: var(--pf-accent);
            color: #fff;
            border-radius: 7px;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .accordion-body {
            padding: 18px 24px 22px 60px;
            font-size: 0.95rem;
            line-height: 1.9;
            color: var(--pf-muted);
            background: var(--pf-surface);
        }
        .pf-quick-form {
            padding: 64px 0;
            background: var(--pf-surface);
        }
        .pf-quick-form .form-card {
            background: var(--pf-bg);
            border-radius: var(--pf-radius-lg);
            border: 1px solid var(--pf-border);
            box-shadow: var(--pf-shadow);
            padding: 36px;
            transition: var(--pf-transition);
        }
        .pf-quick-form .form-card:hover {
            box-shadow: var(--pf-shadow-hover);
        }
        .pf-quick-form .form-label {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--pf-ink);
            margin-bottom: 8px;
        }
        .pf-quick-form .form-control,
        .pf-quick-form .form-select {
            border: 1px solid #d8d6d0;
            border-radius: var(--pf-radius-sm);
            padding: 11px 14px;
            font-size: 0.95rem;
            color: var(--pf-ink);
            transition: var(--pf-transition);
            box-shadow: none;
        }
        .pf-quick-form .form-control:focus,
        .pf-quick-form .form-select:focus {
            border-color: var(--pf-highlight);
            box-shadow: 0 0 0 3px rgba(46, 199, 166, 0.15);
            outline: none;
        }
        .pf-quick-form .btn-submit {
            background: var(--pf-accent);
            color: #fff;
            border: none;
            border-radius: var(--pf-radius-sm);
            padding: 12px 28px;
            font-weight: 700;
            font-size: 0.95rem;
            transition: var(--pf-transition);
        }
        .pf-quick-form .btn-submit:hover {
            background: #e94b2e;
            box-shadow: 0 6px 18px rgba(255, 90, 60, 0.35);
        }
        .pf-support-channels {
            padding: 64px 0;
            background: var(--pf-bg);
        }
        .pf-support-channels .channel-card {
            background: var(--pf-surface);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            box-shadow: var(--pf-shadow);
            padding: 24px;
            height: 100%;
            transition: var(--pf-transition);
            text-align: center;
        }
        .pf-support-channels .channel-card:hover {
            box-shadow: var(--pf-shadow-hover);
            transform: translateY(-4px);
        }
        .pf-support-channels .channel-icon {
            display: inline-flex;
            width: 52px;
            height: 52px;
            background: var(--pf-primary);
            color: var(--pf-highlight);
            border-radius: 14px;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .pf-support-channels .channel-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .pf-support-channels .channel-card p {
            font-size: 0.9rem;
            color: var(--pf-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .pf-related-articles {
            padding: 64px 0;
            background: var(--pf-surface);
        }
        .pf-related-articles .article-card {
            background: var(--pf-bg);
            border: 1px solid var(--pf-border);
            border-radius: var(--pf-radius);
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            transition: var(--pf-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .pf-related-articles .article-card:hover {
            box-shadow: var(--pf-shadow-hover);
            transform: translateY(-4px);
        }
        .pf-related-articles .article-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .pf-related-articles .article-card .article-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .pf-related-articles .article-card h3 {
            font-size: 1rem;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 8px;
            color: var(--pf-ink);
        }
        .pf-related-articles .article-card p {
            font-size: 0.88rem;
            color: var(--pf-muted);
            line-height: 1.7;
            margin-bottom: 12px;
            flex: 1;
        }
        .pf-related-articles .article-card .article-meta {
            font-size: 0.78rem;
            color: var(--pf-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .pf-related-articles .article-card .article-meta i {
            color: var(--pf-accent);
        }
        .pf-cta-bottom {
            background: var(--pf-primary);
            color: #fff;
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }
        .pf-cta-bottom::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -80px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(46, 199, 166, 0.16) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .pf-cta-bottom .cta-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .pf-cta-bottom h2 {
            font-size: 1.8rem;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 1rem;
        }
        .pf-cta-bottom p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.85;
            margin-bottom: 1.8rem;
        }
        .pf-cta-bottom .btn-download {
            background: var(--pf-accent);
            color: #fff;
            border: none;
            border-radius: var(--pf-radius-sm);
            padding: 14px 32px;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--pf-transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .pf-cta-bottom .btn-download:hover {
            background: #e94b2e;
            box-shadow: 0 8px 24px rgba(255, 90, 60, 0.4);
            color: #fff;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--pf-accent);
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--pf-accent);
            border-radius: 1px;
        }
        .section-title {
            font-size: clamp(1.4rem, 3vw, 1.9rem);
            font-weight: 700;
            line-height: 1.35;
            color: var(--pf-ink);
            margin-bottom: 1rem;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--pf-muted);
            line-height: 1.85;
            max-width: 680px;
        }
        .pf-footer {
            background: var(--pf-primary);
            color: rgba(255, 255, 255, 0.82);
            padding: 56px 0 24px;
        }
        .pf-footer .footer-brand {
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .pf-footer .footer-brand .brand-icon {
            display: inline-flex;
            width: 32px;
            height: 32px;
            background: var(--pf-accent);
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: #fff;
        }
        .pf-footer h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .pf-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .pf-footer ul li {
            margin-bottom: 10px;
        }
        .pf-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: var(--pf-transition);
        }
        .pf-footer ul li a:hover {
            color: var(--pf-highlight);
        }
        .pf-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
            align-items: center;
            justify-content: space-between;
        }
        .pf-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .pf-footer .footer-bottom a:hover {
            color: var(--pf-highlight);
        }
        @media (max-width: 991px) {
            .pf-header .navbar-collapse {
                background: var(--pf-primary);
                border-radius: 12px;
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(255, 255, 255, 0.1);
            }
            .pf-header .nav-cta {
                display: inline-block;
                margin-top: 8px;
            }
            .pf-hero-faq {
                padding: 48px 0 36px;
            }
            .accordion-body {
                padding: 16px 20px 20px 44px;
            }
        }
        @media (max-width: 767px) {
            :root {
                --pf-section-pad: 48px 0;
            }
            .pf-hero-faq {
                padding: 40px 0 32px;
            }
            .pf-hero-faq h1 {
                font-size: 1.7rem;
            }
            .pf-quick-form .form-card {
                padding: 24px;
            }
            .pf-support-channels .channel-card {
                margin-bottom: 16px;
            }
            .pf-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .pf-hero-faq .search-box {
                flex-direction: column;
            }
            .pf-hero-faq .search-box .btn-search {
                width: 100%;
                text-align: center;
            }
            .accordion-button {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .accordion-body {
                padding: 14px 16px 18px 38px;
                font-size: 0.88rem;
            }
            .pf-anchor-nav .anchor-pill {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .pf-related-articles .article-card img {
                height: 150px;
            }
        }

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