/* roulang page: index */
:root {
            --bg: #020617;
            --bg2: #0A1228;
            --bg3: #061224;
            --panel: #0F172A;
            --blue: #3B82F6;
            --blue2: #2563EB;
            --cyan: #22D3EE;
            --ice: #7DD3FC;
            --ink: #E6F1FF;
            --sub: #94A3B8;
            --dim: #64748B;
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(59, 130, 246, 0.35);
            --glass-border-hover: rgba(34, 211, 238, 0.6);
            --glow-blue: 0 0 20px rgba(34, 211, 238, 0.55);
            --radius: 20px;
            --shadow: 0 8px 32px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 12px 40px rgba(34, 211, 238, 0.25);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #020617 0%, #0A1228 38%, #061224 100%);
            color: var(--ink);
            line-height: 1.7;
            min-height: 100vh;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container-max {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* 玻璃卡片 */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }

        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        /* 发光按钮 */
        .btn-glow {
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .btn-glow:hover {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.75);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        }

        .btn-glass {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid rgba(148, 163, 184, 0.45);
            color: var(--ink);
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 500;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            backdrop-filter: blur(10px);
            white-space: nowrap;
        }

        .btn-glass:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }

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

        /* 导航 */
        .brand-row {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(2, 6, 23, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.22);
        }

        .channel-row {
            background: rgba(10, 18, 40, 0.7);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            backdrop-filter: blur(12px);
        }

        .nav-link {
            position: relative;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .nav-link:hover {
            color: var(--ink);
            background: rgba(59, 130, 246, 0.12);
        }

        .nav-link.active {
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: inset 0 -2px 0 var(--cyan);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 40%;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            border-radius: 2px;
        }

        .scrollbar-hide {
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 82vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.25), transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(34, 211, 238, 0.15), transparent 50%), linear-gradient(135deg, #020617, #0A1228 50%, #061224);
        }

        .grid-pattern {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(59, 130, 246, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .glow-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(90px);
            pointer-events: none;
            animation: floatOrb 8s ease-in-out infinite alternate;
        }

        @keyframes floatOrb {
            0% { transform: translate(0, 0) scale(1); }
            100% { transform: translate(30px, -20px) scale(1.08); }
        }

        .badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--ice);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            letter-spacing: 0.5px;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            animation: pulseDot 2s ease-in-out infinite;
        }

        @keyframes pulseDot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.55; transform: scale(1.4); }
        }

        /* 图片容器 */
        .img-cover {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 16px;
            transition: transform .5s ease;
        }

        .img-frame {
            border-radius: 20px;
            overflow: hidden;
            position: relative;
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(59, 130, 246, 0.3);
        }

        .img-frame:hover .img-cover {
            transform: scale(1.05);
        }

        .img-frame::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(2, 6, 23, 0.7) 100%);
            pointer-events: none;
            border-radius: 20px;
        }

        /* 指标数字 */
        .metric-num {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.1;
            color: var(--cyan);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.5px;
            text-shadow: 0 0 20px rgba(34, 211, 238, 0.4);
        }

        .metric-label {
            font-size: 14px;
            color: var(--sub);
            font-weight: 500;
            letter-spacing: 0.4px;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid rgba(59, 130, 246, 0.25);
            border-radius: 16px;
            background: rgba(15, 23, 42, 0.5);
            backdrop-filter: blur(12px);
            transition: all .3s ease;
            overflow: hidden;
        }

        .faq-item.active {
            border-color: rgba(34, 211, 238, 0.55);
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.15);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            transition: color .3s ease;
            gap: 16px;
            user-select: none;
            text-align: left;
            width: 100%;
            background: transparent;
            border: none;
        }

        .faq-question:hover {
            color: var(--ice);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(34, 211, 238, 0.12);
            color: var(--cyan);
            font-weight: 700;
            font-size: 18px;
            transition: transform .35s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .45s ease, padding .35s ease;
            color: var(--sub);
            font-size: 15px;
            line-height: 1.75;
            padding-left: 22px;
            padding-right: 22px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
            padding-top: 4px;
        }

        /* 表单 */
        .form-input {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(148, 163, 184, 0.35);
            border-radius: 12px;
            padding: 12px 16px;
            color: var(--ink);
            font-size: 15px;
            width: 100%;
            transition: all .3s ease;
            min-height: 46px;
        }

        .form-input:focus {
            border-color: var(--cyan);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.25);
            background: rgba(255, 255, 255, 0.06);
        }

        .form-input::placeholder {
            color: var(--dim);
        }

        /* 浮动CTA */
        .floating-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 60;
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 4px 24px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 999px;
            padding: 14px 26px;
            font-weight: 600;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all .3s ease;
            letter-spacing: 0.4px;
            border: none;
        }

        .floating-cta:hover {
            box-shadow: 0 6px 36px rgba(34, 211, 238, 0.8);
            transform: translateY(-3px);
        }

        .floating-cta:active {
            transform: translateY(0);
        }

        /* 移动端导航 */
        .mobile-menu-btn {
            display: none;
            background: rgba(59, 130, 246, 0.15);
            border: 1px solid rgba(59, 130, 246, 0.35);
            border-radius: 10px;
            padding: 8px 14px;
            color: var(--ink);
            font-size: 14px;
            transition: all .3s ease;
        }

        .mobile-menu-btn:hover {
            background: rgba(59, 130, 246, 0.25);
        }

        /* 横滑轨道 */
        .scroll-row {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding-bottom: 6px;
        }
        .scroll-row::-webkit-scrollbar {
            display: none;
        }
        .scroll-row > * {
            scroll-snap-align: start;
            flex-shrink: 0;
        }

        /* 标签 */
        .pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.3px;
            border: 1px solid rgba(148, 163, 184, 0.3);
            color: var(--sub);
            background: rgba(15, 23, 42, 0.5);
            transition: all .3s ease;
        }

        .pill:hover {
            border-color: var(--cyan);
            color: var(--ice);
        }

        .pill-highlight {
            border-color: rgba(34, 211, 238, 0.5);
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.08);
        }

        /* 页脚链接 */
        .footer-link {
            color: var(--sub);
            font-size: 14px;
            transition: color .3s ease;
        }
        .footer-link:hover {
            color: var(--ice);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .metric-num {
                font-size: 34px;
            }
            .container-max {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: inline-flex;
            }
            .channel-row-desktop {
                display: none;
            }
            .channel-row-mobile {
                display: block;
            }
            .hero-section {
                min-height: auto;
                padding-top: 60px;
                padding-bottom: 60px;
                text-align: center;
            }
            .hero-grid {
                grid-template-columns: 1fr !important;
                gap: 36px !important;
            }
            .floating-cta {
                right: 14px;
                bottom: 14px;
                padding: 12px 20px;
                font-size: 13px;
            }
            .metric-num {
                font-size: 30px;
            }
            .btn-glow,
            .btn-glass {
                width: 100%;
                justify-content: center;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding-left: 18px;
                padding-right: 18px;
                font-size: 14px;
            }
            .glass-card {
                border-radius: 16px;
            }
            .img-frame {
                border-radius: 16px;
            }
            .img-frame::after {
                border-radius: 16px;
            }
        }

        @media (max-width: 520px) {
            html {
                font-size: 15px;
            }
            .container-max {
                padding-left: 12px;
                padding-right: 12px;
            }
            .metric-num {
                font-size: 26px;
            }
            .floating-cta {
                right: 10px;
                bottom: 10px;
                padding: 10px 16px;
                font-size: 12px;
            }
            .badge-tag {
                font-size: 12px;
                padding: 6px 12px;
            }
        }

        @media (min-width: 769px) {
            .channel-row-mobile {
                display: none;
            }
        }

        .channel-row-mobile {
            background: rgba(10, 18, 40, 0.85);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
        }
        .channel-row-mobile .scroll-row {
            padding: 10px 0;
        }
        .channel-row-mobile .nav-link {
            padding: 8px 14px;
            font-size: 13px;
        }

/* roulang page: category2 */
:root {
            --bg: #020617;
            --bg2: #0A1228;
            --bg3: #061224;
            --panel: #0F172A;
            --blue: #3B82F6;
            --blue2: #2563EB;
            --cyan: #22D3EE;
            --ice: #7DD3FC;
            --ink: #E6F1FF;
            --sub: #94A3B8;
            --dim: #64748B;
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(59, 130, 246, 0.35);
            --glass-border-hover: rgba(34, 211, 238, 0.6);
            --glow-blue: 0 0 20px rgba(34, 211, 238, 0.55);
            --radius: 20px;
            --shadow: 0 8px 32px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 12px 40px rgba(34, 211, 238, 0.25);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #020617 0%, #0A1228 38%, #061224 100%);
            color: var(--ink);
            line-height: 1.7;
            min-height: 100vh;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        .container-max {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }
        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .btn-glow {
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .btn-glow:hover {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.75);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        }
        .btn-glass {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid rgba(148, 163, 184, 0.45);
            color: var(--ink);
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 500;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            backdrop-filter: blur(10px);
            white-space: nowrap;
        }
        .btn-glass:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }
        .btn-glass:active {
            transform: translateY(0);
        }
        .brand-row {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(2, 6, 23, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.22);
        }
        .channel-row {
            background: rgba(10, 18, 40, 0.7);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 64px;
            z-index: 40;
        }
        .nav-link {
            position: relative;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
            display: inline-flex;
            align-items: center;
        }
        .nav-link:hover {
            color: var(--ink);
            background: rgba(59, 130, 246, 0.12);
        }
        .nav-link.active {
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: inset 0 -2px 0 var(--cyan);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 40%;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            border-radius: 2px;
        }
        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .hero-section {
            position: relative;
            min-height: 80vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.28), transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(34, 211, 238, 0.18), transparent 50%), linear-gradient(135deg, #020617, #0A1228 50%, #061224);
        }
        .grid-pattern {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }
        .progress-bar-track {
            background: rgba(148, 163, 184, 0.18);
            border-radius: 999px;
            height: 14px;
            overflow: hidden;
            box-shadow: inset 0 1px 4px rgba(2, 6, 23, 0.5);
        }
        .progress-bar-fill {
            background: linear-gradient(90deg, #2563EB, #22D3EE);
            border-radius: 999px;
            height: 100%;
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.65);
            transition: width 1.2s ease;
        }
        .pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(34, 211, 238, 0.12);
            color: var(--ice);
            border: 1px solid rgba(34, 211, 238, 0.3);
            letter-spacing: 0.4px;
        }
        .footer-link {
            color: var(--sub);
            font-size: 14px;
            transition: color .3s ease, text-shadow .3s ease;
            display: inline-block;
        }
        .footer-link:hover {
            color: var(--cyan);
            text-shadow: 0 0 12px rgba(34, 211, 238, 0.45);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--ink);
            letter-spacing: 0.3px;
        }
        .section-sub {
            font-size: 15px;
            color: var(--sub);
            line-height: 1.7;
            max-width: 640px;
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.35), rgba(34, 211, 238, 0.25));
            border: 1px solid rgba(59, 130, 246, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.2);
        }
        .solution-card-img {
            height: 190px;
            object-fit: cover;
            border-radius: 16px 16px 0 0;
            transition: transform .5s ease;
        }
        .solution-card:hover .solution-card-img {
            transform: scale(1.04);
        }
        .faq-item {
            border: 1px solid rgba(59, 130, 246, 0.3);
            border-radius: 16px;
            background: rgba(15, 23, 42, 0.5);
            backdrop-filter: blur(14px);
            transition: all .3s ease;
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: rgba(34, 211, 238, 0.5);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
            gap: 16px;
            transition: color .3s ease;
        }
        .faq-question:hover {
            color: var(--ice);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(34, 211, 238, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--cyan);
            transition: transform .35s ease;
            font-weight: 700;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(34, 211, 238, 0.25);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .35s ease;
            padding: 0 22px;
            color: var(--sub);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 0 14px rgba(34, 211, 238, 0.5);
            flex-shrink: 0;
        }
        .benchmark-card {
            background: rgba(15, 23, 42, 0.65);
            border: 1px solid rgba(59, 130, 246, 0.3);
            border-radius: 18px;
            padding: 28px 24px;
            backdrop-filter: blur(14px);
            transition: all .35s ease;
        }
        .benchmark-card:hover {
            border-color: rgba(34, 211, 238, 0.55);
            box-shadow: 0 8px 28px rgba(34, 211, 238, 0.18);
        }
        .benchmark-value {
            font-size: 40px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #7DD3FC, #22D3EE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }
        @media (max-width: 1024px) {
            .section-title {
                font-size: 26px;
            }
            .hero-section {
                min-height: auto;
                padding: 70px 0 60px;
            }
            .channel-row {
                top: 60px;
            }
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 22px;
            }
            .benchmark-value {
                font-size: 30px;
            }
            .hero-section {
                padding: 50px 0 40px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 13px;
            }
            .faq-item.open .faq-answer {
                padding-bottom: 16px;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 20px;
            }
            .container-max {
                padding-left: 14px;
                padding-right: 14px;
            }
            .btn-glow,
            .btn-glass {
                width: 100%;
                font-size: 14px;
                padding: 10px 18px;
            }
            .benchmark-card {
                padding: 20px 16px;
            }
            .benchmark-value {
                font-size: 26px;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #020617;
            --bg2: #0A1228;
            --bg3: #061224;
            --panel: #0F172A;
            --blue: #3B82F6;
            --blue2: #2563EB;
            --cyan: #22D3EE;
            --ice: #7DD3FC;
            --ink: #E6F1FF;
            --sub: #94A3B8;
            --dim: #64748B;
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(59, 130, 246, 0.35);
            --glass-border-hover: rgba(34, 211, 238, 0.6);
            --glow-blue: 0 0 20px rgba(34, 211, 238, 0.55);
            --radius: 20px;
            --shadow: 0 8px 32px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 12px 40px rgba(34, 211, 238, 0.25);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #020617 0%, #0A1228 38%, #061224 100%);
            color: var(--ink);
            line-height: 1.7;
            min-height: 100vh;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        .container-max {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }
        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .btn-glow {
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .btn-glow:hover {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.75);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        }
        .btn-glass {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid rgba(148, 163, 184, 0.45);
            color: var(--ink);
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 500;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            backdrop-filter: blur(10px);
            white-space: nowrap;
        }
        .btn-glass:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }
        .btn-glass:active {
            transform: translateY(0);
        }
        .brand-row {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(2, 6, 23, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.22);
        }
        .channel-row {
            background: rgba(10, 18, 40, 0.7);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            backdrop-filter: blur(12px);
        }
        .nav-link {
            position: relative;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .nav-link:hover {
            color: var(--ink);
            background: rgba(59, 130, 246, 0.12);
        }
        .nav-link.active {
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: inset 0 -2px 0 var(--cyan);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 40%;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            border-radius: 2px;
        }
        .hero-section {
            position: relative;
            min-height: 72vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.3), transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(34, 211, 238, 0.18), transparent 50%), linear-gradient(135deg, #020617, #0A1228 50%, #061224);
        }
        .grid-pattern {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(59, 130, 246, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
        }
        .scrollbar-hide {
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .pill {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 500;
            color: var(--ice);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            white-space: nowrap;
        }
        .footer-link {
            color: var(--sub);
            font-size: 14px;
            transition: color .3s ease;
        }
        .footer-link:hover {
            color: var(--ice);
        }
        .stat-number {
            font-variant-numeric: tabular-nums;
            font-weight: 700;
            color: var(--ice);
        }
        .faq-item {
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            transition: all .3s ease;
            overflow: hidden;
        }
        .faq-item.active {
            border-color: var(--glass-border-hover);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.15);
        }
        .faq-question {
            padding: 18px 22px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-weight: 600;
            font-size: 16px;
            color: var(--ink);
            transition: color .3s ease;
        }
        .faq-question:hover {
            color: var(--ice);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .45s ease, padding .45s ease;
            color: var(--sub);
            font-size: 14px;
            line-height: 1.7;
            padding: 0 22px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(34, 211, 238, 0.1);
            color: var(--cyan);
            font-weight: 700;
            transition: transform .3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .form-input {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(148, 163, 184, 0.35);
            border-radius: 12px;
            padding: 12px 16px;
            color: var(--ink);
            font-size: 14px;
            width: 100%;
            transition: all .3s ease;
        }
        .form-input:focus {
            border-color: var(--cyan);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.25);
            outline: none;
        }
        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--sub);
            margin-bottom: 6px;
        }
        .icon-circle {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.3), rgba(6, 182, 212, 0.25));
            border: 1px solid rgba(59, 130, 246, 0.4);
            color: var(--ice);
            font-size: 18px;
            flex-shrink: 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 1px;
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.25);
            margin-bottom: 16px;
        }
        @media (max-width: 768px) {
            .btn-glow, .btn-glass {
                width: 100%;
                padding-left: 16px;
                padding-right: 16px;
                font-size: 14px;
            }
            .hero-section {
                min-height: 60vh;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 13px;
                padding: 0 16px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }
            .channel-row-desktop {
                display: none;
            }
            .channel-row-mobile {
                display: block;
            }
            .brand-row .container-max {
                padding-left: 12px;
                padding-right: 12px;
            }
        }
        @media (min-width: 769px) {
            .channel-row-mobile {
                display: none;
            }
        }
        @media (max-width: 640px) {
            .stat-number {
                font-size: 24px;
            }
        }

/* roulang page: category4 */
:root {
            --bg: #020617;
            --bg2: #0A1228;
            --bg3: #061224;
            --panel: #0F172A;
            --blue: #3B82F6;
            --blue2: #2563EB;
            --cyan: #22D3EE;
            --ice: #7DD3FC;
            --ink: #E6F1FF;
            --sub: #94A3B8;
            --dim: #64748B;
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(59, 130, 246, 0.35);
            --glass-border-hover: rgba(34, 211, 238, 0.6);
            --glow-blue: 0 0 20px rgba(34, 211, 238, 0.55);
            --radius: 20px;
            --shadow: 0 8px 32px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 12px 40px rgba(34, 211, 238, 0.25);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #020617 0%, #0A1228 38%, #061224 100%);
            color: var(--ink);
            line-height: 1.7;
            min-height: 100vh;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        .container-max {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }
        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .btn-glow {
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .btn-glow:hover {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.75);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        }
        .btn-glass {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid rgba(148, 163, 184, 0.45);
            color: var(--ink);
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 500;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            backdrop-filter: blur(10px);
            white-space: nowrap;
        }
        .btn-glass:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }
        .brand-row {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(2, 6, 23, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.22);
        }
        .channel-row {
            background: rgba(10, 18, 40, 0.7);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 64px;
            z-index: 40;
        }
        .nav-link {
            position: relative;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link:hover {
            color: var(--ink);
            background: rgba(59, 130, 246, 0.12);
        }
        .nav-link.active {
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: inset 0 -2px 0 var(--cyan);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 40%;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            border-radius: 2px;
        }
        .hero-channel {
            position: relative;
            min-height: 58vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: radial-gradient(ellipse at 65% 25%, rgba(37, 99, 235, 0.3), transparent 58%), radial-gradient(ellipse at 15% 75%, rgba(34, 211, 238, 0.16), transparent 50%), linear-gradient(135deg, #020617, #0A1228 50%, #061224);
        }
        .grid-pattern {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(59, 130, 246, 0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, 0.07) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
        }
        .glow-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            pointer-events: none;
            opacity: .6;
        }
        .case-card-lg {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
            overflow: hidden;
        }
        .case-card-lg:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .case-card-sm {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }
        .case-card-sm:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .metric-num {
            font-variant-numeric: tabular-nums;
            font-weight: 800;
            background: linear-gradient(135deg, #7DD3FC, #22D3EE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(59, 130, 246, 0.15);
            border: 1px solid rgba(59, 130, 246, 0.35);
            color: var(--ice);
            white-space: nowrap;
        }
        .footer-link {
            color: var(--sub);
            font-size: 14px;
            transition: all .3s ease;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .footer-link:hover {
            color: var(--cyan);
        }
        .faq-item {
            border: 1px solid var(--glass-border);
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            border-radius: 16px;
            transition: all .3s ease;
            overflow: hidden;
        }
        .faq-item.open {
            border-color: var(--glass-border-hover);
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.2);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 16px;
            color: var(--ink);
            text-align: left;
            transition: all .3s ease;
        }
        .faq-question:hover {
            color: var(--ice);
        }
        .faq-answer {
            padding: 0 22px 20px;
            color: var(--sub);
            font-size: 14px;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-indicator {
            flex-shrink: 0;
            transition: transform .3s ease;
            color: var(--cyan);
            font-size: 20px;
            font-weight: 300;
        }
        .faq-item.open .faq-indicator {
            transform: rotate(45deg);
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .industry-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 12px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(15, 23, 42, 0.7);
            border: 1px solid rgba(59, 130, 246, 0.3);
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
        }
        .industry-badge:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.25);
        }
        .data-bar {
            height: 6px;
            border-radius: 3px;
            background: rgba(59, 130, 246, 0.15);
            overflow: hidden;
        }
        .data-bar-fill {
            height: 100%;
            border-radius: 3px;
            background: linear-gradient(90deg, #2563EB, #22D3EE);
            box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
        }
        .testimonial-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            box-shadow: var(--shadow);
            transition: all .35s ease;
            padding: 24px;
        }
        .testimonial-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.35);
            color: var(--cyan);
            letter-spacing: 1px;
        }
        .footer-section {
            background: rgba(2, 6, 23, 0.95);
            border-top: 1px solid rgba(59, 130, 246, 0.25);
        }
        .pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(59, 130, 246, 0.12);
            border: 1px solid rgba(59, 130, 246, 0.3);
            color: var(--sub);
        }
        @media (max-width: 768px) {
            .channel-row {
                top: 56px;
            }
            .hero-channel {
                min-height: 50vh;
            }
            .case-grid-lg {
                grid-template-columns: 1fr;
            }
            .case-grid-sm {
                grid-template-columns: 1fr;
            }
            .metric-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .metric-grid {
                grid-template-columns: 1fr;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 13px;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .case-grid-sm {
                grid-template-columns: 1fr 1fr;
            }
            .case-grid-lg {
                grid-template-columns: 1fr;
            }
        }
        @media (min-width: 1025px) {
            .case-grid-lg {
                grid-template-columns: 1.2fr 0.8fr;
            }
            .case-grid-sm {
                grid-template-columns: 1fr 1fr 1fr;
            }
        }
        .focus-ring:focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 3px;
            border-radius: 10px;
        }

/* roulang page: category3 */
:root {
            --bg: #020617;
            --bg2: #0A1228;
            --bg3: #061224;
            --panel: #0F172A;
            --blue: #3B82F6;
            --blue2: #2563EB;
            --cyan: #22D3EE;
            --ice: #7DD3FC;
            --ink: #E6F1FF;
            --sub: #94A3B8;
            --dim: #64748B;
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(59, 130, 246, 0.35);
            --glass-border-hover: rgba(34, 211, 238, 0.6);
            --glow-blue: 0 0 20px rgba(34, 211, 238, 0.55);
            --radius: 20px;
            --shadow: 0 8px 32px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 12px 40px rgba(34, 211, 238, 0.25);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #020617 0%, #0A1228 38%, #061224 100%);
            color: var(--ink);
            line-height: 1.7;
            min-height: 100vh;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        .container-max {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }
        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .btn-glow {
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .btn-glow:hover {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.75);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        }
        .btn-glass {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid rgba(148, 163, 184, 0.45);
            color: var(--ink);
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 500;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            backdrop-filter: blur(10px);
            white-space: nowrap;
        }
        .btn-glass:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }
        .btn-glass:active {
            transform: translateY(0);
        }
        .brand-row {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(2, 6, 23, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.22);
        }
        .channel-row {
            background: rgba(10, 18, 40, 0.7);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            backdrop-filter: blur(12px);
        }
        .nav-link {
            position: relative;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
            display: inline-flex;
            align-items: center;
        }
        .nav-link:hover {
            color: var(--ink);
            background: rgba(59, 130, 246, 0.12);
        }
        .nav-link.active {
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: inset 0 -2px 0 var(--cyan);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 40%;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            border-radius: 2px;
        }
        .scrollbar-hide {
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .hero-scene {
            position: relative;
            min-height: 72vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.25), transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(34, 211, 238, 0.15), transparent 50%), linear-gradient(135deg, #020617, #0A1228 50%, #061224);
        }
        .grid-pattern {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(59, 130, 246, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }
        .pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            line-height: 1.5;
            background: rgba(34, 211, 238, 0.12);
            border: 1px solid rgba(34, 211, 238, 0.3);
            color: var(--ice);
            letter-spacing: 0.3px;
        }
        .pill-blue {
            background: rgba(59, 130, 246, 0.12);
            border-color: rgba(59, 130, 246, 0.35);
            color: var(--ice);
        }
        .footer-link {
            color: var(--sub);
            font-size: 14px;
            transition: color .3s ease;
        }
        .footer-link:hover {
            color: var(--ice);
        }
        .scene-card-cover {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 14px 14px 0 0;
            transition: transform .5s ease;
        }
        .glass-card:hover .scene-card-cover {
            transform: scale(1.03);
        }
        .stat-number {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.15;
            font-variant-numeric: tabular-nums;
            background: linear-gradient(135deg, #7DD3FC, #22D3EE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .faq-item {
            border: 1px solid rgba(59, 130, 246, 0.25);
            border-radius: 14px;
            background: rgba(15, 23, 42, 0.45);
            backdrop-filter: blur(12px);
            transition: all .3s ease;
            margin-bottom: 10px;
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: rgba(34, 211, 238, 0.45);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--ink);
            gap: 12px;
            user-select: none;
        }
        .faq-question .faq-indicator {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            border: 1px solid rgba(34, 211, 238, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--cyan);
            font-size: 14px;
            transition: all .3s ease;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .3s ease;
            padding: 0 20px;
            color: var(--sub);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-item.open .faq-indicator {
            background: rgba(34, 211, 238, 0.15);
            border-color: var(--cyan);
            transform: rotate(45deg);
        }
        .form-input {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(148, 163, 184, 0.35);
            border-radius: 10px;
            padding: 12px 16px;
            font-size: 14px;
            color: var(--ink);
            width: 100%;
            transition: all .3s ease;
        }
        .form-input:focus {
            border-color: var(--cyan);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.25);
            background: rgba(255, 255, 255, 0.06);
        }
        .form-input::placeholder {
            color: var(--dim);
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--sub);
            line-height: 1.7;
            max-width: 680px;
        }
        .scene-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 6px;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.5px;
            background: rgba(59, 130, 246, 0.15);
            color: var(--ice);
            border: 1px solid rgba(59, 130, 246, 0.3);
            text-transform: uppercase;
        }
        .step-connector {
            flex-shrink: 0;
            width: 2px;
            height: 40px;
            background: linear-gradient(180deg, rgba(34, 211, 238, 0.6), rgba(59, 130, 246, 0.2));
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 22px;
            }
            .hero-scene {
                min-height: 60vh;
                padding-top: 60px;
                padding-bottom: 40px;
            }
            .stat-number {
                font-size: 28px;
            }
            .btn-glow,
            .btn-glass {
                width: 100%;
                max-width: 320px;
                margin-left: auto;
                margin-right: auto;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 20px;
            }
            .container-max {
                padding-left: 14px;
                padding-right: 14px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 13px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
        }

/* roulang page: category5 */
:root {
            --bg: #020617;
            --bg2: #0A1228;
            --bg3: #061224;
            --panel: #0F172A;
            --blue: #3B82F6;
            --blue2: #2563EB;
            --cyan: #22D3EE;
            --ice: #7DD3FC;
            --ink: #E6F1FF;
            --sub: #94A3B8;
            --dim: #64748B;
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(59, 130, 246, 0.35);
            --glass-border-hover: rgba(34, 211, 238, 0.6);
            --glow-blue: 0 0 20px rgba(34, 211, 238, 0.55);
            --radius: 20px;
            --shadow: 0 8px 32px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 12px 40px rgba(34, 211, 238, 0.25);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #020617 0%, #0A1228 38%, #061224 100%);
            color: var(--ink);
            line-height: 1.7;
            min-height: 100vh;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container-max {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }

        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .btn-glow {
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            letter-spacing: 0.5px;
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-glow:hover {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.75);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        }

        .btn-glass {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid rgba(148, 163, 184, 0.45);
            color: var(--ink);
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 500;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            backdrop-filter: blur(10px);
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-glass:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }

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

        .brand-row {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(2, 6, 23, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.22);
        }

        .channel-row {
            background: rgba(10, 18, 40, 0.7);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .nav-link {
            position: relative;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
            display: inline-flex;
            align-items: center;
        }

        .nav-link:hover {
            color: var(--ink);
            background: rgba(59, 130, 246, 0.12);
        }

        .nav-link.active {
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: inset 0 -2px 0 var(--cyan);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 40%;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            border-radius: 2px;
        }

        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }

        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        .pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(59, 130, 246, 0.15);
            border: 1px solid rgba(59, 130, 246, 0.3);
            color: var(--ice);
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        .footer-link {
            color: var(--sub);
            font-size: 14px;
            transition: all .3s ease;
        }

        .footer-link:hover {
            color: var(--cyan);
        }

        .hero-section {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.25), transparent 60%), radial-gradient(ellipse at 20% 80%, rgba(34, 211, 238, 0.15), transparent 50%), linear-gradient(135deg, #020617, #0A1228 50%, #061224);
        }

        .hero-bg-img {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .grid-pattern {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(59, 130, 246, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px);
            background-size: 48px 48px;
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            width: 100%;
        }

        .glow-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 12px var(--cyan), 0 0 24px rgba(34, 211, 238, 0.5);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(1.3);
            }
        }

        .price-card {
            position: relative;
            border-radius: var(--radius);
            transition: all .35s ease;
            overflow: hidden;
        }

        .price-card.recommended {
            border: 1.5px solid rgba(34, 211, 238, 0.6);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.3), var(--shadow);
        }

        .price-card.recommended::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius);
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(34, 211, 238, 0.08));
            pointer-events: none;
            z-index: 0;
        }

        .price-card .price-content {
            position: relative;
            z-index: 1;
        }

        .price-card.recommended .btn-glow {
            box-shadow: 0 0 28px rgba(34, 211, 238, 0.7), 0 0 48px rgba(34, 211, 238, 0.3);
        }

        .price-card.recommended:hover {
            box-shadow: 0 0 42px rgba(34, 211, 238, 0.4), var(--shadow-hover);
            transform: translateY(-4px);
        }

        .price-card:not(.recommended):hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .badge-recommend {
            position: absolute;
            top: 16px;
            right: 16px;
            z-index: 2;
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            color: #fff;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.6);
        }

        .price-value {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -1px;
            font-variant-numeric: tabular-nums;
            background: linear-gradient(135deg, #7DD3FC, #22D3EE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .price-unit {
            font-size: 16px;
            font-weight: 500;
            color: var(--sub);
            -webkit-text-fill-color: var(--sub);
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--sub);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 10px;
        }

        .feature-list li::before {
            content: '✓';
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: rgba(34, 211, 238, 0.15);
            color: var(--cyan);
            font-weight: 700;
            font-size: 12px;
            margin-top: 2px;
        }

        .feature-list li.disabled {
            color: var(--dim);
            text-decoration: line-through;
            text-decoration-color: rgba(100, 116, 139, 0.5);
        }

        .feature-list li.disabled::before {
            content: '—';
            background: rgba(100, 116, 139, 0.15);
            color: var(--dim);
        }

        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: 14px;
            transition: all .3s ease;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .faq-item:hover {
            border-color: var(--glass-border-hover);
        }

        .faq-item.open {
            border-color: var(--cyan);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.15);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
            cursor: pointer;
            transition: color .3s ease;
            min-height: 52px;
        }

        .faq-question:hover {
            color: var(--ice);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--cyan);
            transition: transform .3s ease;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .4s ease;
            padding: 0 20px;
            color: var(--sub);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 18px;
        }

        .table-compare th {
            font-size: 13px;
            font-weight: 600;
            color: var(--sub);
            text-align: left;
            padding: 12px 14px;
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            letter-spacing: 0.5px;
        }

        .table-compare td {
            font-size: 14px;
            color: var(--ink);
            padding: 12px 14px;
            border-bottom: 1px solid rgba(59, 130, 246, 0.1);
        }

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

        .table-compare .check {
            color: var(--cyan);
            font-weight: 700;
        }

        .table-compare .dash {
            color: var(--dim);
        }

        .step-card {
            position: relative;
            padding: 24px;
            border-radius: 16px;
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            transition: all .35s ease;
        }

        .step-card:hover {
            border-color: var(--cyan);
            box-shadow: var(--shadow-hover);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            margin-bottom: 14px;
            box-shadow: 0 0 14px rgba(34, 211, 238, 0.4);
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 60vh;
                padding: 60px 0 40px;
            }
            .price-value {
                font-size: 36px;
            }
            .container-max {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 13px;
            }
            .btn-glow,
            .btn-glass {
                padding: 10px 18px;
                font-size: 14px;
                white-space: normal;
            }
            .table-compare th,
            .table-compare td {
                padding: 8px 10px;
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            .price-value {
                font-size: 30px;
            }
            .hero-section h1 {
                font-size: 2rem !important;
                line-height: 1.25 !important;
            }
            .badge-recommend {
                top: 10px;
                right: 10px;
                padding: 4px 10px;
                font-size: 10px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .step-card {
                padding: 18px;
            }
        }

/* roulang page: category6 */
:root {
            --bg: #020617;
            --bg2: #0A1228;
            --bg3: #061224;
            --panel: #0F172A;
            --blue: #3B82F6;
            --blue2: #2563EB;
            --cyan: #22D3EE;
            --ice: #7DD3FC;
            --ink: #E6F1FF;
            --sub: #94A3B8;
            --dim: #64748B;
            --glass-bg: rgba(15, 23, 42, 0.55);
            --glass-border: rgba(59, 130, 246, 0.35);
            --glass-border-hover: rgba(34, 211, 238, 0.6);
            --glow-blue: 0 0 20px rgba(34, 211, 238, 0.55);
            --radius: 20px;
            --shadow: 0 8px 32px rgba(2, 6, 23, 0.45);
            --shadow-hover: 0 12px 40px rgba(34, 211, 238, 0.25);
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #020617 0%, #0A1228 38%, #061224 100%);
            color: var(--ink);
            line-height: 1.7;
            min-height: 100vh;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        .container-max {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .35s ease;
        }

        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .btn-glow {
            background: linear-gradient(135deg, #2563EB, #06B6D4);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.55);
            color: #fff;
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .btn-glow:hover {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 32px rgba(34, 211, 238, 0.75);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
        }

        .btn-glass {
            background: rgba(15, 23, 42, 0.4);
            border: 1px solid rgba(148, 163, 184, 0.45);
            color: var(--ink);
            border-radius: 14px;
            padding: 12px 28px;
            font-weight: 500;
            font-size: 15px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
            backdrop-filter: blur(10px);
            white-space: nowrap;
        }

        .btn-glass:hover {
            border-color: var(--cyan);
            color: var(--ice);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.25);
        }

        .brand-row {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(2, 6, 23, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(59, 130, 246, 0.22);
        }

        .channel-row {
            background: rgba(10, 18, 40, 0.7);
            border-bottom: 1px solid rgba(59, 130, 246, 0.2);
            backdrop-filter: blur(12px);
        }

        .nav-link {
            position: relative;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--sub);
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .nav-link:hover {
            color: var(--ink);
            background: rgba(59, 130, 246, 0.12);
        }

        .nav-link.active {
            color: var(--cyan);
            background: rgba(34, 211, 238, 0.1);
            box-shadow: inset 0 -2px 0 var(--cyan);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 40%;
            height: 2px;
            background: var(--cyan);
            box-shadow: 0 0 10px var(--cyan);
            border-radius: 2px;
        }

        .hero-banner {
            position: relative;
            padding: 80px 0 70px;
            overflow: hidden;
            background: radial-gradient(ellipse at 60% 20%, rgba(37, 99, 235, 0.3), transparent 55%), radial-gradient(ellipse at 15% 70%, rgba(34, 211, 238, 0.18), transparent 45%), linear-gradient(135deg, #020617, #0A1228 50%, #061224);
        }

        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

        .hero-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.16;
            pointer-events: none;
        }

        .pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(34, 211, 238, 0.12);
            border: 1px solid rgba(34, 211, 238, 0.3);
            color: var(--ice);
            white-space: nowrap;
        }

        .footer-link {
            color: var(--sub);
            font-size: 14px;
            transition: color .3s ease;
        }

        .footer-link:hover {
            color: var(--cyan);
        }

        .form-input {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(148, 163, 184, 0.35);
            border-radius: 12px;
            padding: 12px 16px;
            color: var(--ink);
            font-size: 14px;
            transition: all .3s ease;
            width: 100%;
        }

        .form-input:focus {
            border-color: var(--cyan);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.25);
            outline: none;
        }

        .form-input::placeholder {
            color: var(--dim);
        }

        .faq-item {
            border: 1px solid var(--glass-border);
            border-radius: 16px;
            background: var(--glass-bg);
            backdrop-filter: blur(18px);
            transition: all .3s ease;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .faq-item:hover {
            border-color: var(--glass-border-hover);
        }

        .faq-item.active {
            border-color: var(--cyan);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.15);
        }

        .faq-question {
            padding: 18px 20px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 600;
            font-size: 16px;
            color: var(--ink);
            user-select: none;
            transition: color .3s ease;
        }

        .faq-question:hover {
            color: var(--ice);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(59, 130, 246, 0.15);
            color: var(--cyan);
            font-size: 16px;
            transition: transform .3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(34, 211, 238, 0.25);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
            color: var(--sub);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-answer-inner {
            padding: 0 20px 18px;
        }

        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }

        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        .step-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.7);
            flex-shrink: 0;
            margin-top: 5px;
        }

        .stat-value {
            font-size: 36px;
            font-weight: 800;
            color: var(--ice);
            letter-spacing: -0.5px;
            font-variant-numeric: tabular-nums;
            line-height: 1.1;
            text-shadow: 0 0 20px rgba(34, 211, 238, 0.35);
        }

        .cover-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: 14px;
            transition: transform .4s ease;
        }

        .cover-wrap:hover .cover-img {
            transform: scale(1.03);
        }

        .cover-wrap {
            overflow: hidden;
            border-radius: 14px;
            position: relative;
        }

        .resource-card {
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .resource-card .card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .resource-card .card-body .btn-holder {
            margin-top: auto;
            padding-top: 16px;
        }

        @media (max-width: 1024px) {
            .hero-banner {
                padding: 60px 0 50px;
            }
            .stat-value {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            .hero-banner {
                padding: 48px 0 40px;
            }
            .stat-value {
                font-size: 26px;
            }
            .btn-glow,
            .btn-glass {
                padding: 10px 20px;
                font-size: 14px;
                min-height: 44px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 13px;
            }
            .faq-question {
                padding: 15px 16px;
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .stat-value {
                font-size: 22px;
            }
            .btn-glow,
            .btn-glass {
                width: 100%;
                justify-content: center;
                padding: 12px 16px;
            }
        }