/* roulang page: index */
:root {
            --bg-main: #0A0E1A;
            --bg-secondary: #0F1526;
            --bg-card: rgba(255, 255, 255, 0.04);
            --border-card: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(34, 211, 238, 0.3);
            --text-title: #E2E8F0;
            --text-body: #94A3B8;
            --text-muted: #64748B;
            --text-disabled: #475569;
            --accent: #22D3EE;
            --primary: #2563EB;
            --radius-card: 1rem;
            --radius-lg: 1.25rem;
            --shadow-card: 0 4px 24px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.2);
            --shadow-hover: 0 8px 40px rgba(0,0,0,0.4);
            --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-main);
            color: var(--text-body);
            line-height: 1.7;
            margin: 0;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container-site {
            max-width: 80rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: var(--radius-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

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

        .btn-primary {
            background: linear-gradient(135deg, #2563EB, #22D3EE);
            color: #fff;
            font-weight: 600;
            border-radius: 0.5rem;
            padding: 0.75rem 1.5rem;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 14px rgba(0,0,0,0.3);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.5), 0 6px 20px rgba(0,0,0,0.35);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #E2E8F0;
            font-weight: 500;
            border-radius: 0.5rem;
            padding: 0.75rem 1.5rem;
            font-size: 0.95rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            border-color: rgba(34, 211, 238, 0.5);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        .nav-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.7rem;
            font-weight: 500;
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: #22D3EE;
            background: rgba(34, 211, 238, 0.1);
            letter-spacing: 0.02em;
        }

        .section-title {
            font-size: 1.875rem;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.3;
            margin-bottom: 1rem;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 36rem;
        }

        .link-text {
            color: var(--accent);
            transition: color 0.3s;
            font-size: 0.9rem;
        }

        .link-text:hover {
            color: #67e8f9;
        }

        .hero-bg {
            background-image: 
                radial-gradient(ellipse 80% 60% at 50% -10%, rgba(34, 211, 238, 0.12) 0%, transparent 100%),
                url('/assets/images/backpic/back-1.png'),
                linear-gradient(135deg, rgba(9, 11, 20, 0.9) 0%, rgba(15, 22, 40, 0.7) 100%);
            background-size: cover, cover, cover;
            background-position: center, center, center;
            position: relative;
        }

        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: 
                linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
            background-size: 32px 32px;
            pointer-events: none;
        }

        .keyword-gradient {
            background: linear-gradient(90deg, #67e8f9, #60a5fa);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .nav-channel {
            background: rgba(10, 14, 26, 0.7);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .channel-item {
            display: inline-flex;
            align-items: center;
            padding: 0.375rem 1rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            color: #94A3B8;
            border: 1px solid transparent;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .channel-item:hover {
            color: #E2E8F0;
            background: rgba(255, 255, 255, 0.05);
        }

        .channel-item.active {
            color: #67e8f9;
            background: rgba(34, 211, 238, 0.1);
            border-color: rgba(34, 211, 238, 0.3);
        }

        .stat-number {
            background: linear-gradient(135deg, #67e8f9, #60a5fa);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease, opacity 0.3s ease;
            opacity: 0;
            padding: 0 1.5rem;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            opacity: 1;
            padding-bottom: 1.25rem;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-arrow {
            transition: transform 0.3s ease;
        }

        .footer-bottom-bar {
            background: rgba(6, 9, 18, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .timeline-step {
            position: relative;
        }

        .timeline-step:not(:last-child)::after {
            content: '';
            position: absolute;
            left: 1.15rem;
            top: 2.6rem;
            bottom: -1.5rem;
            width: 1px;
            background: linear-gradient(to bottom, rgba(34,211,238,0.4), transparent);
        }

        .line-clamp-1 {
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .input-field {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 0.75rem;
            padding: 0.6rem 1rem;
            font-size: 0.85rem;
            color: #E2E8F0;
            transition: border-color 0.3s, box-shadow 0.3s;
            outline: none;
        }

        .input-field:focus {
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 0 0 2px rgba(34, 211, 238, 0.2);
        }

        .scroll-indicator {
            width: 26px;
            height: 42px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 9999px;
            position: relative;
        }

        .scroll-indicator::after {
            content: '';
            position: absolute;
            top: 8px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 8px;
            border-radius: 9999px;
            background: rgba(255, 255, 255, 0.6);
            animation: scrollHint 2s infinite;
        }

        @keyframes scrollHint {
            0% { opacity: 1; transform: translate(-50%, 0); }
            70% { opacity: 0; transform: translate(-50%, 12px); }
            100% { opacity: 0; transform: translate(-50%, 0); }
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.5rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F1526;
            --bg-deep: #060912;
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-border: rgba(255, 255, 255, 0.08);
            --primary: #2563EB;
            --accent: #22D3EE;
            --amber: #F59E0B;
            --text-title: #E2E8F0;
            --text-body: #94A3B8;
            --text-weak: #64748B;
            --radius-card: 16px;
            --radius-lg: 24px;
            --radius-full: 9999px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.25);
            --transition-base: all 0.3s ease;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-primary);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            padding-bottom: 72px;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            background: none;
            border: none;
        }
        input {
            font-family: inherit;
            outline: none;
        }
        .container-site {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container-site {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-site {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .section-padding {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }
        @media (min-width: 768px) {
            .section-padding {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: var(--transition-base);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(34, 211, 238, 0.3);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 0.75rem 1.75rem;
            border-radius: 0.75rem;
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 14px rgba(0, 0, 0, 0.3);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.5), 0 6px 20px rgba(0, 0, 0, 0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #E2E8F0;
            font-weight: 500;
            font-size: 0.9375rem;
            padding: 0.75rem 1.75rem;
            border-radius: 0.75rem;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(34, 211, 238, 0.5);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .input-field {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-full);
            padding: 0.5rem 1rem;
            font-size: 0.875rem;
            color: #E2E8F0;
            transition: var(--transition-base);
        }
        .input-field::placeholder {
            color: #64748B;
        }
        .input-field:focus {
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-pill {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.45rem 1.1rem;
            font-size: 0.875rem;
            font-weight: 500;
            color: #94A3B8;
            border-radius: var(--radius-full);
            border: 1px solid transparent;
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-pill:hover {
            color: #E2E8F0;
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-pill.active {
            background: rgba(34, 211, 238, 0.1);
            color: #22D3EE;
            border-color: rgba(34, 211, 238, 0.3);
        }
        .nav-scroll {
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-scroll::-webkit-scrollbar {
            display: none;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.25rem 0.85rem;
            font-size: 0.75rem;
            font-weight: 500;
            color: #22D3EE;
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.2);
            border-radius: var(--radius-full);
        }
        .text-gradient {
            background: linear-gradient(90deg, #22D3EE, #60A5FA);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }
        .hero-bg {
            position: relative;
            background-color: #0A0E1A;
            background-image:
                radial-gradient(800px 400px at 20% 20%, rgba(34, 211, 238, 0.14), transparent 60%),
                radial-gradient(700px 350px at 80% 30%, rgba(37, 99, 235, 0.15), transparent 60%),
                url('/assets/images/backpic/back-1.png');
            background-size: auto, auto, cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(10, 14, 26, 0.5), rgba(10, 14, 26, 0.75), #0A0E1A);
            z-index: 1;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: #E2E8F0;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-top: 0.75rem;
            margin-bottom: 1rem;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
        }
        .image-frame {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-card);
            height: 280px;
        }
        @media (min-width: 768px) {
            .image-frame {
                height: 340px;
            }
        }
        .image-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .image-frame:hover img {
            transform: scale(1.03);
        }
        .step-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            padding: 1.25rem;
            transition: var(--transition-base);
        }
        .step-card:hover {
            border-color: rgba(34, 211, 238, 0.3);
            background: rgba(255, 255, 255, 0.06);
            transform: translateX(4px);
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            text-align: left;
            font-size: 0.9375rem;
            font-weight: 500;
            color: #E2E8F0;
            transition: var(--transition-base);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
            color: #22D3EE;
        }
        .faq-question i {
            font-size: 0.75rem;
            color: #64748B;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            font-size: 0.875rem;
            line-height: 1.7;
            color: #94A3B8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 1.25rem;
        }
        .cta-card {
            background:
                radial-gradient(500px 300px at 50% 30%, rgba(34, 211, 238, 0.12), transparent 70%),
                linear-gradient(160deg, #0F1526, #0A0E1A);
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-card);
        }
        footer a {
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: #22D3EE;
        }
        @media (max-width: 768px) {
            .md\:hidden {
                display: block;
            }
        }
        @media (min-width: 768px) {
            .mobile-cta {
                display: none;
            }
            .desktop-cta {
                display: block;
            }
        }
        .mobile-cta {
            display: none;
        }

/* roulang page: article */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F1526;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.07);
            --border-soft: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(34, 211, 238, 0.3);
            --text-heading: #E2E8F0;
            --text-body: #94A3B8;
            --text-soft: #64748B;
            --text-dim: #475569;
            --brand-blue: #2563EB;
            --brand-cyan: #22D3EE;
            --amber: #F59E0B;
            --radius-card: 16px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2);
            --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 14px rgba(0, 0, 0, 0.3);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background: var(--bg-primary);
            color: var(--text-body);
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s;
        }
        img {
            display: block;
            max-width: 100%;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            background: none;
            border: none;
        }
        input {
            font-family: inherit;
        }
        .container-site {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1rem;
        }
        @media (min-width: 640px) {
            .container-site {
                padding: 0 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-site {
                padding: 0 2rem;
            }
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(12px);
            transition: all .3s ease;
        }
        .glass-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(34, 211, 238, 0.25);
            transform: translateY(-4px);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            border: none;
            box-shadow: var(--shadow-glow);
            transition: all .3s ease;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #E2E8F0;
            font-weight: 500;
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            transition: all .3s ease;
        }
        .btn-ghost:hover {
            border-color: rgba(34, 211, 238, 0.5);
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }
        .input-field {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 9999px;
            padding: 0.5rem 1rem 0.5rem 2.5rem;
            font-size: 0.875rem;
            color: #E2E8F0;
            outline: none;
            transition: all .2s;
        }
        .input-field::placeholder {
            color: #64748B;
        }
        .input-field:focus {
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
        }
        .channel-item {
            display: inline-flex;
            align-items: center;
            padding: 0.4rem 1rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            color: #94A3B8;
            border: 1px solid transparent;
            white-space: nowrap;
            transition: all .25s;
        }
        .channel-item:hover {
            color: #E2E8F0;
            background: rgba(255, 255, 255, 0.05);
        }
        .channel-item.active {
            background: rgba(34, 211, 238, 0.1);
            color: #22D3EE;
            border-color: rgba(34, 211, 238, 0.3);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.15rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            color: #22D3EE;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.2);
        }
        .no-scrollbar {
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .article-body {
            font-size: 1rem;
            color: #94A3B8;
            line-height: 1.9;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #E2E8F0;
            margin: 2.5rem 0 1rem;
            line-height: 1.4;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #E2E8F0;
            margin: 2rem 0 0.75rem;
        }
        .article-body p {
            margin-bottom: 1.25rem;
        }
        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }
        .article-body li {
            margin-bottom: 0.5rem;
        }
        .article-body a {
            color: #22D3EE;
        }
        .article-body a:hover {
            text-decoration: underline;
        }
        .article-body blockquote {
            border-left: 3px solid #22D3EE;
            background: rgba(34, 211, 238, 0.06);
            padding: 1rem 1.5rem;
            border-radius: 0 0.75rem 0.75rem 0;
            margin: 1.5rem 0;
            color: #94A3B8;
            font-style: normal;
        }
        .article-body img {
            border-radius: 12px;
            margin: 1.5rem 0;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .article-body pre {
            background: #0F1526;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            padding: 1rem 1.25rem;
            overflow-x: auto;
            font-family: "SF Mono", Consolas, monospace;
            font-size: 0.875rem;
            color: #E2E8F0;
            margin: 1.5rem 0;
        }
        .article-body code {
            font-family: "SF Mono", Consolas, monospace;
            font-size: 0.9em;
            background: rgba(255, 255, 255, 0.06);
            padding: 0.2em 0.4em;
            border-radius: 4px;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.925rem;
        }
        .article-body th,
        .article-body td {
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 0.65rem 1rem;
            text-align: left;
        }
        .article-body th {
            background: rgba(255, 255, 255, 0.05);
            color: #E2E8F0;
            font-weight: 600;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-icon {
            transition: transform .3s;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        body {
            padding-bottom: 64px;
        }
        @media (max-width: 640px) {
            body {
                padding-bottom: 72px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F1526;
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-border: rgba(255, 255, 255, 0.08);
            --card-hover-border: rgba(34, 211, 238, 0.3);
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --accent: #22D3EE;
            --accent-dark: #06B6D4;
            --amber: #F59E0B;
            --text-title: #E2E8F0;
            --text-body: #94A3B8;
            --text-weak: #64748B;
            --text-muted: #475569;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 10px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.4);
            --glow-primary: 0 0 20px rgba(34, 211, 238, 0.35), 0 4px 14px rgba(0, 0, 0, 0.3);
            --glow-hover: 0 0 30px rgba(34, 211, 238, 0.5);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-bottom: 72px;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
        }
        .container-site {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 16px;
        }
        @media (min-width: 640px) {
            .container-site {
                padding: 0 24px;
            }
        }
        @media (min-width: 1024px) {
            .container-site {
                padding: 0 32px;
            }
        }
        .text-gradient {
            background: linear-gradient(90deg, #22D3EE, #60A5FA);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: var(--card-hover-border);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--accent-dark));
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-sm);
            padding: 12px 26px;
            border: none;
            cursor: pointer;
            box-shadow: var(--glow-primary);
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }
        .btn-primary:hover {
            filter: brightness(1.1);
            box-shadow: var(--glow-hover);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #E2E8F0;
            font-weight: 500;
            font-size: 15px;
            border-radius: var(--radius-sm);
            padding: 12px 26px;
            cursor: pointer;
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }
        .btn-secondary:hover {
            border-color: rgba(34, 211, 238, 0.5);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            color: #22D3EE;
            font-size: 13px;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }
        .input-field {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            padding: 9px 16px;
            font-size: 14px;
            color: #E2E8F0;
            transition: all 0.3s ease;
        }
        .input-field::placeholder {
            color: #64748B;
        }
        .input-field:focus {
            outline: none;
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2);
        }
        .channel-link {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 14px;
            color: #94A3B8;
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all 0.3s ease;
        }
        .channel-link:hover {
            color: #E2E8F0;
            background: rgba(255, 255, 255, 0.05);
        }
        .channel-link.active {
            background: rgba(34, 211, 238, 0.1);
            color: #22D3EE;
            border-color: rgba(34, 211, 238, 0.3);
            font-weight: 500;
        }
        .nav-channel {
            background: rgba(10, 14, 26, 0.7);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 40;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-channel::-webkit-scrollbar {
            display: none;
        }
        .hero-bg {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.7) 0%, rgba(10, 14, 26, 0.8) 50%, rgba(10, 14, 26, 0.95) 100%);
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: #22D3EE;
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.2);
            padding: 4px 14px;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: #E2E8F0;
            margin-top: 16px;
            margin-bottom: 12px;
            line-height: 1.3;
            letter-spacing: -0.02em;
        }
        @media (min-width: 768px) {
            .section-header h2 {
                font-size: 34px;
            }
        }
        .section-header p {
            font-size: 15px;
            color: #94A3B8;
        }
        .timeline {
            position: relative;
            max-width: 880px;
            margin: 0 auto;
            padding-left: 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 10px;
            bottom: 30px;
            width: 2px;
            background: linear-gradient(to bottom, rgba(34, 211, 238, 0.5), rgba(37, 99, 235, 0.15));
        }
        .timeline-item {
            display: flex;
            align-items: flex-start;
            gap: 24px;
            position: relative;
            padding-bottom: 36px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            font-weight: 700;
            color: #22D3EE;
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.35);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.08);
            z-index: 1;
        }
        .timeline-content {
            flex: 1;
            padding: 22px 26px;
        }
        .timeline-content h3 {
            color: #E2E8F0;
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .timeline-content p {
            color: #94A3B8;
            font-size: 14px;
            line-height: 1.75;
        }
        .resource-card {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 22px 24px;
        }
        .resource-card:hover .resource-icon {
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.1);
        }
        .resource-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(34, 211, 238, 0.1));
            border: 1px solid rgba(34, 211, 238, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #22D3EE;
            flex-shrink: 0;
            transition: all 0.3s ease;
        }
        .resource-card h3 {
            color: #E2E8F0;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .resource-card p {
            color: #94A3B8;
            font-size: 14px;
            line-height: 1.6;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            background: transparent;
            border: none;
            cursor: pointer;
            text-align: left;
            color: #E2E8F0;
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question .fa-chevron-down {
            transition: transform 0.3s ease;
            color: #64748B;
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-question.active .fa-chevron-down {
            transform: rotate(180deg);
            color: #22D3EE;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            color: #94A3B8;
            font-size: 14px;
            line-height: 1.75;
        }
        .cta-banner {
            background: radial-gradient(ellipse at 50% 50%, rgba(34, 211, 238, 0.1), transparent 60%),
                linear-gradient(180deg, #0F1526, #0A0E1A);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .bottom-bar-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 12px 16px;
        }
        .bottom-bar-text {
            color: #E2E8F0;
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .bottom-bar-text::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22D3EE;
            box-shadow: 0 0 10px rgba(34, 211, 238, 0.6);
            flex-shrink: 0;
        }
        @media (max-width: 640px) {
            body {
                padding-bottom: 92px;
            }
            .bottom-bar {
                padding: 0 12px 12px;
                background: transparent;
                backdrop-filter: none;
                border-top: none;
            }
            .bottom-bar-inner {
                background: rgba(10, 14, 26, 0.9);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border: 1px solid rgba(255, 255, 255, 0.1);
                border-radius: 999px;
                padding: 8px 12px 8px 16px;
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            }
            .bottom-bar-text {
                font-size: 13px;
            }
        }
        .footer-link {
            color: #64748B;
            font-size: 14px;
            transition: color 0.2s ease;
        }
        .footer-link:hover {
            color: #22D3EE;
        }
        .security-count {
            font-size: 36px;
            font-weight: 700;
            background: linear-gradient(135deg, #22D3EE, #60A5FA);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        @media (min-width: 768px) {
            .security-count {
                font-size: 44px;
            }
        }
        .security-count-label {
            color: #64748B;
            font-size: 14px;
            margin-top: 4px;
        }
        .hero-scroll {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            color: #94A3B8;
            font-size: 12px;
            z-index: 2;
            animation: floatDown 2s ease-in-out infinite;
        }
        @keyframes floatDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }
        .stat-item {
            text-align: center;
            padding: 20px 16px;
        }
        .stat-item:not(:last-child) {
            border-right: 1px solid rgba(255, 255, 255, 0.06);
        }
        @media (max-width: 640px) {
            .stat-item {
                border-right: none !important;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
        }
        .cover-img {
            border-radius: 12px;
            object-fit: cover;
            width: 100%;
            height: 100%;
            min-height: 180px;
        }
        .feature-card-main {
            background: linear-gradient(145deg, rgba(37, 99, 235, 0.12), rgba(34, 211, 238, 0.03));
            border: 1px solid rgba(34, 211, 238, 0.15);
        }
        .ic-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(34, 211, 238, 0.1));
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: #22D3EE;
            font-size: 18px;
            flex-shrink: 0;
            margin-bottom: 14px;
        }
        .security-feature h3 {
            color: #E2E8F0;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .security-feature p {
            color: #94A3B8;
            font-size: 14px;
            line-height: 1.7;
        }
        .marker-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #22D3EE;
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
            display: inline-block;
            margin-right: 8px;
        }
        .faq-icon {
            width: 20px;
            height: 20px;
            color: #22D3EE;
            flex-shrink: 0;
            margin-top: 2px;
        }