/* roulang page: index */
:root {
            --bg-deep: #081416;
            --bg-body: #0B1A1C;
            --bg-card: #101F22;
            --bg-card-hover: #14282C;
            --primary: #22D3A5;
            --secondary: #FF7B54;
            --neon: #43E6FF;
            --text-title: #F2FAF7;
            --text-body: #B7CCC7;
            --text-muted: #7C9892;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-neon: rgba(67, 230, 255, 0.55);
            --gradient-brand: linear-gradient(135deg, #22D3A5, #43E6FF);
            --gradient-cta: linear-gradient(135deg, #FF7B54, #FF9E7A);
            --glow-primary: 0 0 12px rgba(34, 211, 165, 0.35);
            --glow-neon: 0 0 16px rgba(67, 230, 255, 0.35);
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-card: 0 10px 24px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 14px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.25s ease;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            --font-num: "Inter", "DIN Alternate", "PingFang SC", monospace;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--bg-body);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body.nav-open {
            overflow: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-heading {
            margin-bottom: 48px;
        }
        .section-tag {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 0.12em;
            color: var(--primary);
            text-transform: uppercase;
            padding: 6px 14px;
            border: 1px solid rgba(34, 211, 165, 0.35);
            border-radius: 999px;
            margin-bottom: 14px;
            background: rgba(34, 211, 165, 0.06);
        }
        .section-heading h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-title);
            letter-spacing: -0.02em;
            line-height: 1.25;
            position: relative;
            padding-left: 20px;
        }
        .section-heading h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 4px;
            border-radius: 4px;
            background: var(--gradient-brand);
            box-shadow: var(--glow-primary);
        }
        .section-heading p {
            margin-top: 14px;
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.75;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 0 28px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
            user-select: none;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn-primary {
            background: var(--gradient-cta);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.15);
            box-shadow: 0 4px 16px rgba(255, 123, 84, 0.25);
        }
        .btn-primary:hover {
            box-shadow: 0 0 16px rgba(255, 123, 84, 0.4);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-title);
            border-color: rgba(255, 255, 255, 0.25);
        }
        .btn-outline:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(67, 230, 255, 0.2);
            transform: translateY(-2px);
        }
        .btn-cta {
            background: var(--gradient-cta);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.15);
            box-shadow: 0 4px 14px rgba(255, 123, 84, 0.2);
        }
        .btn-cta:hover {
            box-shadow: 0 0 16px rgba(255, 123, 84, 0.4);
            transform: translateY(-2px);
        }
        .btn-submit {
            background: var(--gradient-cta);
            color: #fff;
            width: 100%;
            border-color: rgba(255, 255, 255, 0.1);
            min-height: 48px;
            font-size: 16px;
            font-weight: 700;
        }
        .btn-submit:hover {
            box-shadow: 0 0 16px rgba(255, 123, 84, 0.4);
            transform: translateY(-2px);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 68px;
            z-index: 1000;
            background: rgba(8, 20, 22, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: none;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(8, 20, 22, 0.92);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
        }
        .site-header::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--neon), transparent);
            opacity: 0.35;
            pointer-events: none;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(34, 211, 165, 0.12);
            border: 1px solid rgba(34, 211, 165, 0.3);
        }
        .logo-mark svg {
            width: 20px;
            height: 20px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-title);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .logo-text span {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 2px;
            text-decoration: none;
            transition: color var(--transition);
        }
        .nav-link:hover {
            color: var(--text-title);
        }
        .nav-link.active {
            color: var(--text-title);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--neon);
            box-shadow: 0 4px 12px rgba(67, 230, 255, 0.35);
        }
        .header-cta {
            flex-shrink: 0;
        }
        .header-cta .btn {
            min-height: 38px;
            padding: 0 20px;
            font-size: 14px;
            border-radius: 10px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-subtle);
            border-radius: 10px;
            width: 42px;
            height: 42px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-title);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .nav-open .nav-toggle span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-open .nav-toggle span:nth-child(2) {
            opacity: 0;
        }
        .nav-open .nav-toggle span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-drawer {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            width: 100%;
            background: var(--bg-deep);
            border-bottom: 1px solid var(--border-subtle);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            padding: 20px 16px 28px;
            z-index: 999;
            flex-direction: column;
            gap: 8px;
        }
        .nav-drawer.open {
            display: flex;
        }
        .nav-drawer a {
            padding: 14px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-body);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .nav-drawer a:last-child {
            border-bottom: none;
        }
        .nav-drawer a.active {
            color: var(--neon);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            padding-top: 120px;
            padding-bottom: 80px;
            background: radial-gradient(ellipse at 20% 20%, rgba(34, 211, 165, 0.10), transparent 45%),
                radial-gradient(ellipse at 85% 70%, rgba(255, 123, 84, 0.05), transparent 40%),
                linear-gradient(160deg, #081416 0%, #0B1A1C 50%, #0B1A1C 100%);
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }
        .hero::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 100px;
            background: linear-gradient(180deg, rgba(8, 20, 22, 0.8), transparent);
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 60px;
            align-items: center;
            width: 100%;
        }
        .hero-tag {
            display: inline-block;
            font-size: 12px;
            letter-spacing: 0.1em;
            color: var(--primary);
            padding: 6px 16px;
            border: 1px solid rgba(34, 211, 165, 0.3);
            border-radius: 999px;
            background: rgba(34, 211, 165, 0.06);
            margin-bottom: 24px;
        }
        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--text-title);
            margin-bottom: 20px;
        }
        .hero h1 .gradient-text {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-body);
            max-width: 500px;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-right {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .data-board {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            width: 100%;
            max-width: 440px;
        }
        .data-card {
            background: rgba(16, 31, 34, 0.85);
            border: 1px solid var(--border-subtle);
            border-radius: 18px;
            padding: 24px 20px;
            text-align: center;
            backdrop-filter: blur(6px);
            transition: all var(--transition);
            animation: breathe 3s ease-in-out infinite alternate;
        }
        .data-card:nth-child(2) {
            animation-delay: 0.5s;
        }
        .data-card:nth-child(3) {
            animation-delay: 1s;
        }
        .data-card:nth-child(4) {
            animation-delay: 1.5s;
        }
        .data-card:hover {
            border-color: var(--border-neon);
            box-shadow: 0 0 20px rgba(67, 230, 255, 0.15);
        }
        .data-card .num {
            font-family: var(--font-num);
            font-size: 38px;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
            display: block;
        }
        .data-card .num.gradient-num {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .data-card .label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            display: block;
        }
        @keyframes breathe {
            0% {
                transform: translateY(0);
            }
            100% {
                transform: translateY(-6px);
            }
        }

        /* ===== Metrics Bar ===== */
        .metrics-section {
            position: relative;
            z-index: 5;
            margin-top: -48px;
            padding-bottom: 96px;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 22px;
            padding: 36px 40px;
            box-shadow: var(--shadow-card);
        }
        .metric-item {
            text-align: center;
            padding: 8px 0;
        }
        .metric-item+.metric-item {
            border-left: 1px solid rgba(255, 255, 255, 0.06);
        }
        .metric-num {
            font-family: var(--font-num);
            font-size: 40px;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .metric-num.gradient-num {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .metric-unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--neon);
            margin-left: 2px;
        }
        .metric-label {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            letter-spacing: 0.02em;
        }

        /* ===== Services ===== */
        .services-section {
            padding: 96px 0;
            position: relative;
        }
        .services-layout {
            display: grid;
            grid-template-columns: 0.85fr 1.6fr;
            gap: 56px;
            align-items: start;
        }
        .services-left {
            position: sticky;
            top: 90px;
        }
        .services-left .section-tag {
            margin-bottom: 16px;
        }
        .services-left h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            padding-left: 20px;
            position: relative;
        }
        .services-left h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: var(--gradient-brand);
            box-shadow: var(--glow-primary);
        }
        .services-left p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .services-left .btn {
            margin-top: 8px;
        }
        .services-left-img {
            margin-top: 32px;
            border-radius: 18px;
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
        }
        .services-left-img img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .services-left-img:hover img {
            transform: scale(1.03);
        }
        .services-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            grid-template-areas: "large small1" "large small2";
            gap: 24px;
        }
        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 22px;
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            box-shadow: var(--shadow-hover), 0 0 20px rgba(67, 230, 255, 0.08);
            transform: translateY(-4px);
        }
        .service-card-large {
            grid-area: large;
            padding: 0;
            overflow: hidden;
        }
        .service-card-large .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-subtle);
            transition: transform 0.4s ease;
        }
        .service-card-large:hover .card-img {
            transform: scale(1.02);
        }
        .service-card-large .card-content {
            padding: 32px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(34, 211, 165, 0.1);
            border: 1px solid rgba(34, 211, 165, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            transition: all var(--transition);
        }
        .service-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--primary);
            transition: stroke var(--transition);
        }
        .service-card:hover .service-icon {
            background: rgba(67, 230, 255, 0.1);
            border-color: var(--border-neon);
            box-shadow: 0 0 12px rgba(67, 230, 255, 0.2);
        }
        .service-card:hover .service-icon svg {
            stroke: var(--neon);
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
        }
        .service-tags span {
            font-size: 12px;
            color: var(--primary);
            background: rgba(34, 211, 165, 0.08);
            border: 1px solid rgba(34, 211, 165, 0.2);
            padding: 4px 12px;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }
        .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--neon);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .read-more:hover {
            gap: 10px;
            color: var(--primary);
        }
        .read-more .arrow {
            transition: transform var(--transition);
        }

        /* ===== Comparison ===== */
        .comparison-section {
            padding: 96px 0;
            background: rgba(8, 20, 22, 0.4);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .compare-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 22px;
            padding: 36px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .compare-card.before-card {
            border-color: rgba(255, 255, 255, 0.06);
        }
        .compare-card.after-card {
            border-color: var(--border-neon);
            box-shadow: 0 0 24px rgba(67, 230, 255, 0.06);
        }
        .compare-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .compare-card.before-card h3 {
            color: #8A9E99;
        }
        .compare-card.after-card h3 {
            color: var(--neon);
        }
        .compare-icon {
            width: 24px;
            height: 24px;
        }
        .compare-row {
            margin-bottom: 22px;
        }
        .compare-row:last-child {
            margin-bottom: 0;
        }
        .row-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
        }
        .row-label {
            font-size: 14px;
            color: var(--text-body);
        }
        .row-value {
            font-family: var(--font-num);
            font-size: 16px;
            font-weight: 700;
            font-variant-numeric: tabular-nums;
        }
        .before-card .row-value {
            color: #5A6B68;
        }
        .after-card .row-value {
            color: var(--neon);
        }
        .progress-track {
            height: 6px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.06);
            overflow: hidden;
        }
        .progress-fill {
            height: 100%;
            border-radius: 999px;
            transition: width 0.6s ease;
        }
        .before-card .progress-fill {
            background: #5A6B68;
        }
        .after-card .progress-fill {
            background: var(--gradient-brand);
            box-shadow: 0 0 8px rgba(34, 211, 165, 0.4);
        }
        .comparison-cta {
            text-align: center;
            margin-top: 20px;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            padding: 10px 0;
            transition: all var(--transition);
        }
        .text-link:hover {
            color: var(--neon);
            gap: 10px;
        }

        /* ===== News ===== */
        .news-section {
            padding: 96px 0;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            box-shadow: var(--shadow-hover), 0 0 20px rgba(67, 230, 255, 0.06);
            transform: translateY(-4px);
        }
        .news-cover {
            position: relative;
            display: block;
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .news-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-cover img {
            transform: scale(1.03);
        }
        .news-cat {
            position: absolute;
            left: 14px;
            bottom: 14px;
            font-size: 12px;
            color: var(--text-title);
            background: rgba(13, 27, 30, 0.75);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 4px 12px;
            border-radius: 999px;
            backdrop-filter: blur(6px);
        }
        .news-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-body h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-title);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 48px;
        }
        .news-body h3 a:hover {
            color: var(--neon);
        }
        .news-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
            margin-bottom: 16px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 13px;
            color: var(--text-muted);
        }
        .news-meta a {
            color: var(--neon);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .news-meta a:hover {
            color: var(--primary);
            gap: 8px;
        }
        .news-empty {
            border: 2px dashed rgba(255, 255, 255, 0.12);
            border-radius: 22px;
            padding: 80px 40px;
            text-align: center;
            color: var(--text-muted);
            background: rgba(16, 31, 34, 0.4);
        }
        .news-empty svg {
            width: 42px;
            height: 42px;
            margin: 0 auto 16px;
            display: block;
            opacity: 0.5;
        }
        .news-empty p {
            font-size: 15px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 96px 0;
            background: rgba(8, 20, 22, 0.4);
            border-top: 1px solid var(--border-subtle);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: 16px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item.active {
            border-color: var(--border-neon);
            box-shadow: 0 0 16px rgba(67, 230, 255, 0.06);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            user-select: none;
            border: none;
            background: transparent;
            text-align: left;
            width: 100%;
            gap: 16px;
        }
        .faq-question::before {
            content: "";
            width: 3px;
            height: 18px;
            border-radius: 3px;
            background: var(--gradient-brand);
            flex-shrink: 0;
            margin-right: 4px;
            box-shadow: var(--glow-primary);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all 0.3s ease;
            position: relative;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--text-muted);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .faq-icon::before {
            width: 10px;
            height: 2px;
        }
        .faq-icon::after {
            width: 2px;
            height: 10px;
        }
        .faq-item.active .faq-icon {
            border-color: var(--neon);
            background: rgba(67, 230, 255, 0.06);
        }
        .faq-item.active .faq-icon::before {
            background: var(--neon);
        }
        .faq-item.active .faq-icon::after {
            background: var(--neon);
            transform: rotate(90deg);
            opacity: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 28px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-muted);
            padding-left: 38px;
        }

        /* ===== Contact Form ===== */
        .contact-section {
            padding: 96px 0;
            position: relative;
        }
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: start;
        }
        .contact-info .section-tag {
            margin-bottom: 16px;
        }
        .contact-info h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-title);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
            padding-left: 20px;
            position: relative;
        }
        .contact-info h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: var(--gradient-brand);
            box-shadow: var(--glow-primary);
        }
        .contact-info p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 420px;
        }
        .contact-list {
            list-style: none;
            padding: 0;
        }
        .contact-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            font-size: 15px;
            color: var(--text-body);
        }
        .contact-list .icon-wrap {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(34, 211, 165, 0.08);
            border: 1px solid rgba(34, 211, 165, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .contact-list .icon-wrap svg {
            width: 18px;
            height: 18px;
            stroke: var(--primary);
        }
        .contact-form-card {
            position: relative;
            background: linear-gradient(160deg, var(--bg-deep), var(--bg-card));
            border-radius: 24px;
            padding: 40px;
            box-shadow: var(--shadow-card);
        }
        .contact-form-card::before {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: 24px;
            padding: 1px;
            background: linear-gradient(135deg, rgba(34, 211, 165, 0.4), rgba(67, 230, 255, 0.2), rgba(255, 123, 84, 0.3));
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            margin-bottom: 8px;
        }
        .form-group input,
        .form-group select {
            width: 100%;
            height: 46px;
            padding: 0 16px;
            background: #0D1B1E;
            border: 1px solid var(--border-subtle);
            border-radius: 12px;
            font-size: 14px;
            font-family: var(--font-main);
            color: var(--text-title);
            transition: all var(--transition);
            appearance: none;
            -webkit-appearance: none;
        }
        .form-group select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%237C9892' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
        }
        .form-group input::placeholder {
            color: rgba(124, 152, 146, 0.6);
        }
        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--neon);
            box-shadow: 0 0 0 3px rgba(67, 230, 255, 0.15);
        }
        .form-hint {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: none;
            position: relative;
        }
        .footer-top-line {
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--neon), var(--secondary));
            opacity: 0.7;
        }
        .footer-main {
            padding: 60px 0 40px;
            display: grid;
            grid-template-columns: 1.3fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-logo .logo-mark {
            width: 30px;
            height: 30px;
            border-radius: 8px;
        }
        .footer-logo .logo-text {
            font-size: 18px;
        }
        .footer-logo .logo-text span {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 16px;
        }
        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom span {
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1280px) {
            .hero h1 {
                font-size: 44px;
            }
            .services-layout {
                grid-template-columns: 0.9fr 1.4fr;
                gap: 40px;
            }
        }
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero {
                min-height: auto;
                padding-top: 120px;
                padding-bottom: 120px;
            }
            .data-board {
                max-width: 100%;
            }
            .services-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .services-left {
                position: static;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-main {
                grid-template-columns: 1fr 1fr;
            }
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .contact-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }
        @media (max-width: 768px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
                padding: 24px;
            }
            .metric-item+.metric-item {
                border-left: none;
            }
            .metric-item:nth-child(2n+1) {
                border-right: 1px solid rgba(255, 255, 255, 0.06);
            }
            .services-grid {
                grid-template-columns: 1fr;
                grid-template-areas: "large" "small1" "small2";
            }
            .comparison-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .hero h1 {
                font-size: 34px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .services-section,
            .comparison-section,
            .news-section,
            .faq-section,
            .contact-section,
            .metrics-section {
                padding-top: 56px;
                padding-bottom: 56px;
            }
            .section-heading h2 {
                font-size: 26px;
            }
            .contact-form-card {
                padding: 24px;
            }
            .footer-main {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 28px;
            }
            .hero-tag {
                font-size: 11px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .data-card .num {
                font-size: 30px;
            }
            .metric-num {
                font-size: 30px;
            }
            .compare-card {
                padding: 24px;
            }
            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding-left: 24px;
                padding-right: 20px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #081416;
            --bg-body: #0B1A1C;
            --bg-card: #101F22;
            --bg-card-hover: #14282C;
            --primary: #22D3A5;
            --secondary: #FF7B54;
            --neon: #43E6FF;
            --text-title: #F2FAF7;
            --text-body: #B7CCC7;
            --text-muted: #7C9892;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-neon: rgba(67, 230, 255, 0.55);
            --gradient-brand: linear-gradient(135deg, #22D3A5, #43E6FF);
            --gradient-cta: linear-gradient(135deg, #FF7B54, #FF9E7A);
            --glow-primary: 0 0 12px rgba(34, 211, 165, 0.35);
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-num: "Inter", "DIN Alternate", "PingFang SC", sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg-body);
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body.no-scroll {
            overflow: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            outline: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 68px;
            z-index: 100;
            background: rgba(8, 20, 22, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background .3s ease, box-shadow .3s ease;
        }
        .site-header::after {
            content: '';
            display: block;
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--neon), transparent);
            opacity: .45;
        }
        .header-inner {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(34, 211, 165, 0.08);
            border: 1px solid rgba(34, 211, 165, 0.25);
        }
        .logo-mark svg {
            width: 24px;
            height: 24px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-title);
            letter-spacing: .01em;
            line-height: 1.2;
        }
        .logo-text span {
            color: var(--primary);
            font-weight: 600;
            margin-left: 2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 36px;
        }
        .nav-link {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 0;
            transition: color .25s ease, text-shadow .25s ease;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link.active {
            color: #fff;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--neon);
            box-shadow: 0 4px 12px rgba(67, 230, 255, 0.35);
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 11px 24px;
            min-height: 44px;
            transition: all .25s ease;
            line-height: 1.2;
        }
        .btn:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }
        .btn-cta {
            background: var(--gradient-cta);
            color: #1a0e08;
            box-shadow: 0 4px 16px rgba(255, 123, 84, 0.22);
        }
        .btn-cta:hover {
            box-shadow: 0 0 20px rgba(255, 123, 84, 0.45);
            transform: translateY(-2px);
        }
        .btn-cta:active {
            transform: scale(0.98);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-subtle);
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-title);
            border-radius: 2px;
            transition: all .3s ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            min-height: 38vh;
            padding: 150px 0 80px;
            display: flex;
            align-items: center;
            background: radial-gradient(ellipse at 18% 30%, rgba(34, 211, 165, 0.10), transparent 55%),
                linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-body) 65%, var(--bg-card) 100%);
            border-bottom: 1px solid var(--border-subtle);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.09;
            z-index: 0;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            opacity: .5;
        }
        .breadcrumb .current {
            color: var(--text-body);
        }
        .page-hero h1 {
            font-size: 46px;
            font-weight: 800;
            color: var(--text-title);
            letter-spacing: -0.02em;
            line-height: 1.2;
            max-width: 720px;
        }
        .page-hero h1 .accent {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }
        .page-hero .lead {
            font-size: 16px;
            color: var(--text-body);
            max-width: 560px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .btn-primary {
            background: var(--gradient-cta);
            color: #1a0e08;
            box-shadow: 0 4px 16px rgba(255, 123, 84, 0.22);
        }
        .btn-primary:hover {
            box-shadow: 0 0 20px rgba(255, 123, 84, 0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-title);
            border: 1px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 16px rgba(67, 230, 255, 0.2);
            transform: translateY(-2px);
        }

        /* ===== Metrics / 数据指标 ===== */
        .section {
            padding: 96px 0;
        }
        .metrics-wrap {
            margin-top: -40px;
            position: relative;
            z-index: 5;
            padding-bottom: 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: 0 14px 32px rgba(0, 0, 0, 0.3);
        }
        .metric-item {
            text-align: center;
            padding: 12px 8px;
        }
        .metric-number {
            font-family: var(--font-num);
            font-size: 42px;
            font-weight: 700;
            color: #fff;
            line-height: 1.1;
            font-variant-numeric: tabular-nums;
            display: flex;
            align-items: baseline;
            justify-content: center;
            gap: 2px;
        }
        .metric-number .unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
        }
        .metric-item:nth-child(1) .metric-number,
        .metric-item:nth-child(3) .metric-number {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }
        .metric-label {
            margin-top: 10px;
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        /* ===== 板块标题 ===== */
        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-kicker::before {
            content: '';
            width: 22px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        .section-desc {
            margin-top: 14px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ===== 方案内容区 图文交替 ===== */
        .solution-content {
            padding: 96px 0 40px;
        }
        .content-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
            margin-bottom: 80px;
        }
        .content-block.reverse .text-side {
            order: 2;
        }
        .content-block.reverse .media-side {
            order: 1;
        }
        .text-side h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 16px;
            line-height: 1.35;
        }
        .text-side p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-body);
            margin-bottom: 20px;
        }
        .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(34, 211, 165, 0.08);
            border: 1px solid rgba(34, 211, 165, 0.22);
            line-height: 1.6;
        }
        .media-side {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: 0 14px 32px rgba(0, 0, 0, 0.35);
            transition: transform .35s ease, box-shadow .35s ease;
        }
        .media-side:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
        }
        .media-side img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            display: block;
        }

        /* ===== 适用场景 ===== */
        .scenarios {
            padding: 40px 0 96px;
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: all .3s ease;
        }
        .scenario-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            box-shadow: 0 14px 32px rgba(0, 0, 0, 0.35), var(--glow-primary);
            transform: translateY(-4px);
        }
        .scenario-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(34, 211, 165, 0.1);
            border: 1px solid rgba(34, 211, 165, 0.2);
            margin-bottom: 18px;
            color: var(--primary);
        }
        .scenario-icon svg {
            width: 24px;
            height: 24px;
        }
        .scenario-card:hover .scenario-icon {
            color: var(--neon);
            border-color: var(--border-neon);
        }
        .scenario-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 10px;
        }
        .scenario-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-muted);
        }

        /* ===== 实施流程 ===== */
        .process {
            padding: 96px 0;
            background: var(--bg-deep);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: process;
        }
        .process-item {
            position: relative;
            padding: 32px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            transition: all .3s ease;
        }
        .process-item:hover {
            border-color: var(--border-neon);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
            transform: translateY(-4px);
        }
        .process-num {
            font-family: var(--font-num);
            font-size: 38px;
            font-weight: 800;
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            line-height: 1;
            margin-bottom: 18px;
            display: block;
        }
        .process-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 10px;
        }
        .process-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 96px 0 80px;
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all .3s ease;
        }
        .faq-item.open {
            border-color: var(--border-neon);
            box-shadow: 0 0 18px rgba(67, 230, 255, 0.06);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            width: 100%;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-title);
            text-align: left;
            transition: color .2s ease;
            position: relative;
        }
        .faq-question::before {
            content: '';
            flex-shrink: 0;
            width: 3px;
            height: 18px;
            background: var(--gradient-brand);
            border-radius: 3px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            margin-left: auto;
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            font-size: 18px;
            font-weight: 400;
            color: var(--text-muted);
            transition: transform .3s ease, color .3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--neon);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 24px 22px 41px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 40px 0 96px;
        }
        .cta-card {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            padding: 48px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-card) 100%);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--primary), var(--neon), var(--secondary));
            opacity: .7;
        }
        .cta-card::after {
            content: '';
            position: absolute;
            width: 260px;
            height: 260px;
            right: -80px;
            top: -80px;
            background: radial-gradient(circle, rgba(34, 211, 165, 0.14), transparent 70%);
            pointer-events: none;
        }
        .cta-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 8px;
        }
        .cta-text p {
            font-size: 14px;
            color: var(--text-muted);
        }
        .cta-actions {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-shrink: 0;
            position: relative;
            z-index: 2;
        }
        .cta-phone {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-title);
            font-family: var(--font-num);
            font-variant-numeric: tabular-nums;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-subtle);
            position: relative;
        }
        .footer-top-line {
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--neon), var(--secondary));
        }
        .footer-main {
            display: grid;
            grid-template-columns: 1.6fr 0.8fr 0.8fr 1fr;
            gap: 48px;
            padding: 64px 0 48px;
        }
        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 18px;
            letter-spacing: 0.04em;
        }
        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 24px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom-inner span {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-main {
                grid-template-columns: 1fr 1fr;
            }
            .content-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .content-block.reverse .text-side {
                order: 1;
            }
            .content-block.reverse .media-side {
                order: 2;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                height: 60px;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: flex-start;
                background: var(--bg-deep);
                padding: 24px;
                gap: 20px;
                border-bottom: 1px solid var(--border-subtle);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
                transform: translateY(-120%);
                transition: transform .35s ease;
                z-index: 99;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .nav-link {
                font-size: 16px;
                padding: 8px 0;
            }
            .header-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero {
                min-height: 50vh;
                padding: 120px 0 60px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                padding: 24px;
                margin-top: 0;
            }
            .metrics-wrap {
                margin-top: 0;
                padding-top: 56px;
            }
            .section {
                padding: 56px 0;
            }
            .solution-content,
            .scenarios,
            .process,
            .faq-section,
            .cta-section {
                padding: 56px 0;
            }
            .scenario-grid,
            .process-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 26px;
            }
            .cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 24px;
            }
            .footer-main {
                grid-template-columns: 1fr;
                padding: 48px 0 32px;
            }
            .footer-bottom-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .metrics-grid {
                padding: 16px;
                gap: 12px;
            }
            .metric-number {
                font-size: 32px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 12px;
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #081416;
            --bg-body: #0B1A1C;
            --bg-card: #101F22;
            --bg-card-hover: #14282C;
            --primary: #22D3A5;
            --secondary: #FF7B54;
            --neon: #43E6FF;
            --text-title: #F2FAF7;
            --text-body: #B7CCC7;
            --text-muted: #7C9892;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-neon: rgba(67, 230, 255, 0.55);
            --gradient-brand: linear-gradient(135deg, #22D3A5, #43E6FF);
            --gradient-cta: linear-gradient(135deg, #FF7B54, #FF9E7A);
            --glow-primary: 0 0 12px rgba(34, 211, 165, 0.35);
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            background: var(--bg-body);
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-cta {
            background: var(--gradient-cta);
            color: #fff;
            box-shadow: 0 4px 16px rgba(255, 123, 84, 0.25);
        }

        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 16px rgba(255, 123, 84, 0.4);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--text-body);
            color: var(--text-title);
        }

        .btn-outline:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(67, 230, 255, 0.15);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 68px;
            z-index: 1000;
            background: rgba(8, 20, 22, 0.9);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-subtle);
        }

        .site-header::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--neon), transparent);
            opacity: 0.6;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            line-height: 1;
        }

        .logo-mark {
            display: block;
            width: 34px;
            height: 34px;
            flex-shrink: 0;
        }

        .logo-mark svg {
            width: 100%;
            height: 100%;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-title);
            letter-spacing: -0.01em;
        }

        .logo-text span {
            color: var(--primary);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: auto;
        }

        .nav-link {
            font-size: 14px;
            color: var(--text-body);
            text-decoration: none;
            position: relative;
            padding: 8px 2px;
            font-weight: 500;
            transition: color var(--transition);
            line-height: 1.2;
        }

        .nav-link:hover {
            color: #fff;
        }

        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--neon);
            box-shadow: 0 4px 12px rgba(67, 230, 255, 0.35);
            border-radius: 2px;
        }

        .header-cta {
            margin-left: 16px;
        }

        .header-cta .btn {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-title);
            transition: 0.3s ease;
            border-radius: 2px;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .article-hero {
            position: relative;
            padding: 140px 0 64px;
            background:
                radial-gradient(ellipse at 15% 0%, rgba(34, 211, 165, 0.08), transparent 55%),
                radial-gradient(ellipse at 85% 10%, rgba(67, 230, 255, 0.06), transparent 50%),
                linear-gradient(180deg, rgba(8, 20, 22, 0.88), rgba(11, 26, 28, 0.96)),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border-subtle);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }

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

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.2);
        }

        .breadcrumb .current {
            color: var(--text-body);
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-title {
            max-width: 760px;
            margin: 0 auto 24px;
            text-align: center;
            font-size: 38px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--text-title);
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 14px;
        }

        .meta-dot {
            opacity: 0.4;
        }

        .article-body-section {
            padding: 64px 0 40px;
        }

        .article-content {
            max-width: 760px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-body);
        }

        .article-content h2 {
            font-size: 27px;
            font-weight: 700;
            color: var(--text-title);
            margin: 44px 0 18px;
            padding-left: 14px;
            border-left: 3px solid var(--primary);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 600;
            color: var(--text-title);
            margin: 34px 0 14px;
            line-height: 1.4;
        }

        .article-content p {
            margin: 18px 0;
            line-height: 1.8;
        }

        .article-content ul,
        .article-content ol {
            margin: 18px 0;
            padding-left: 26px;
        }

        .article-content li {
            margin: 8px 0;
            line-height: 1.8;
        }

        .article-content blockquote {
            margin: 24px 0;
            padding: 18px 22px;
            background: rgba(34, 211, 165, 0.06);
            border-left: 3px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-title);
            font-style: normal;
        }

        .article-content blockquote p {
            margin: 0;
        }

        .article-content code {
            background: rgba(67, 230, 255, 0.08);
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.88em;
            color: var(--neon);
            font-family: "SF Mono", "Fira Code", Consolas, monospace;
        }

        .article-content pre {
            background: #0D1B1E;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px;
            overflow-x: auto;
            margin: 26px 0;
        }

        .article-content pre code {
            background: transparent;
            color: var(--text-body);
            padding: 0;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            display: block;
            margin: 28px auto;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(34, 211, 165, 0.4);
            transition: text-decoration-color var(--transition);
        }

        .article-content a:hover {
            text-decoration-color: var(--neon);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 26px 0;
            font-size: 14px;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border-subtle);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content th {
            background: rgba(34, 211, 165, 0.06);
            color: var(--text-title);
            font-weight: 600;
        }

        .not-found {
            text-align: center;
            padding: 80px 32px;
            background: var(--bg-card);
            border: 1px dashed var(--border-subtle);
            border-radius: var(--radius-lg);
            margin: 20px 0;
        }

        .not-found h2 {
            font-size: 28px;
            color: var(--text-title);
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .related-section {
            padding: 72px 0 32px;
        }

        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .eyebrow {
            display: inline-block;
            font-size: 13px;
            letter-spacing: 0.1em;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-title);
            letter-spacing: -0.01em;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            text-decoration: none;
            display: block;
        }

        .related-card:hover {
            transform: translateY(-4px);
            background: var(--bg-card-hover);
            border-color: var(--border-neon);
            box-shadow: var(--glow-primary);
        }

        .related-cover {
            aspect-ratio: 16/10;
            overflow: hidden;
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .related-info {
            padding: 18px 20px 20px;
        }

        .related-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 8px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        .back-list {
            text-align: center;
            margin-top: 44px;
        }

        .article-cta {
            padding: 80px 0 96px;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--bg-deep), var(--bg-card));
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--neon), var(--secondary));
        }

        .cta-box h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cta-box p {
            color: var(--text-muted);
            font-size: 16px;
            margin-bottom: 28px;
        }

        .cta-box .btn {
            margin: 0 8px 8px;
        }

        .site-footer {
            background: var(--bg-deep);
            padding: 0 0 0;
        }

        .footer-top-line {
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--neon), var(--secondary));
        }

        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding: 56px 0 40px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 16px;
            max-width: 320px;
            line-height: 1.7;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            line-height: 1;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 18px;
        }

        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            transition: color var(--transition);
            line-height: 1.6;
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding: 20px 0;
        }

        .footer-bottom-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-main {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .site-header {
                height: 60px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: var(--bg-deep);
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
                padding: 24px 24px 32px;
                border-bottom: 1px solid var(--border-subtle);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
                margin-left: 0;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .nav-link {
                font-size: 16px;
                padding: 8px 0;
                width: 100%;
            }

            .nav-link.active::after {
                bottom: 0;
            }

            .header-cta {
                display: none;
            }

            .article-hero {
                padding: 110px 0 44px;
            }

            .article-title {
                font-size: 28px;
                line-height: 1.35;
            }

            .article-body-section {
                padding: 40px 0 24px;
            }

            .article-content {
                font-size: 15px;
                line-height: 1.85;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .cta-box {
                padding: 40px 20px;
            }

            .cta-box h2 {
                font-size: 24px;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 28px;
                padding: 40px 0 24px;
            }

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

        @media (max-width: 520px) {
            .btn {
                height: 44px;
                padding: 0 22px;
                font-size: 14px;
            }

            .article-title {
                font-size: 24px;
            }

            .article-meta {
                font-size: 13px;
                gap: 6px;
            }

            .not-found {
                padding: 48px 20px;
            }

            .not-found h2 {
                font-size: 24px;
            }
        }

/* roulang page: category2 */
:root {
        --bg-deep: #081416;
        --bg-body: #0B1A1C;
        --bg-card: #101F22;
        --bg-card-hover: #14282C;
        --primary: #22D3A5;
        --secondary: #FF7B54;
        --neon: #43E6FF;
        --text-title: #F2FAF7;
        --text-body: #B7CCC7;
        --text-muted: #7C9892;
        --border-subtle: rgba(255, 255, 255, 0.08);
        --border-neon: rgba(67, 230, 255, 0.55);
        --gradient-brand: linear-gradient(135deg, #22D3A5, #43E6FF);
        --gradient-cta: linear-gradient(135deg, #FF7B54, #FF9E7A);
        --glow-primary: 0 0 12px rgba(34, 211, 165, 0.35);
        --radius-lg: 22px;
        --radius-md: 14px;
        --radius-sm: 12px;
        --shadow-card: 0 10px 24px rgba(0, 0, 0, 0.3);
        --shadow-hover: 0 14px 32px rgba(0, 0, 0, 0.45);
        --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        --font-num: Inter, "DIN Alternate", sans-serif;
    }
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: var(--font-base);
        background: var(--bg-body);
        color: var(--text-body);
        font-size: 16px;
        line-height: 1.75;
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    body.nav-open {
        overflow: hidden;
    }
    img {
        max-width: 100%;
        display: block;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: color 0.25s ease;
    }
    button {
        font-family: inherit;
        cursor: pointer;
    }
    input,
    select,
    textarea {
        font-family: inherit;
    }
    ul,
    ol {
        list-style: none;
    }
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }
    a:focus-visible,
    button:focus-visible {
        outline: 2px solid var(--neon);
        outline-offset: 2px;
        border-radius: 4px;
    }
    .section {
        padding: 80px 0;
    }
    .section-label {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        letter-spacing: 0.1em;
        color: var(--primary);
        text-transform: uppercase;
        margin-bottom: 14px;
        font-weight: 600;
    }
    .section-label::before {
        content: "";
        width: 20px;
        height: 2px;
        background: var(--gradient-brand);
        border-radius: 2px;
    }
    .section-title {
        font-size: 32px;
        font-weight: 700;
        color: var(--text-title);
        letter-spacing: -0.02em;
        line-height: 1.3;
        margin-bottom: 20px;
        position: relative;
        padding-left: 16px;
    }
    .section-title::before {
        content: "";
        position: absolute;
        left: 0;
        top: 8px;
        bottom: 8px;
        width: 4px;
        border-radius: 4px;
        background: var(--gradient-brand);
        box-shadow: 0 0 12px rgba(34, 211, 165, 0.35);
    }
    .section-desc {
        font-size: 15px;
        color: var(--text-body);
        max-width: 680px;
        line-height: 1.8;
        margin-bottom: 32px;
    }

    /* ===== Header ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(8, 20, 22, 0.85);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border-subtle);
        height: 68px;
        transition: background 0.3s ease;
    }
    .site-header.scrolled {
        background: rgba(8, 20, 22, 0.96);
    }
    .site-header::after {
        content: "";
        position: absolute;
        bottom: -1px;
        left: 0;
        right: 0;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--neon), transparent);
        opacity: 0.55;
        pointer-events: none;
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        position: relative;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .logo-mark {
        display: flex;
        width: 32px;
        height: 32px;
        flex-shrink: 0;
    }
    .logo-text {
        font-size: 20px;
        font-weight: 800;
        color: var(--text-title);
        letter-spacing: -0.02em;
        line-height: 1;
    }
    .logo-text span {
        color: var(--primary);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 32px;
    }
    .nav-link {
        font-size: 14px;
        color: var(--text-body);
        padding: 8px 2px;
        position: relative;
        transition: color 0.25s ease;
        line-height: 1.4;
    }
    .nav-link:hover {
        color: var(--text-title);
    }
    .nav-link.active {
        color: var(--text-title);
        font-weight: 600;
    }
    .nav-link.active::after {
        content: "";
        position: absolute;
        bottom: -2px;
        left: 0;
        right: 0;
        height: 2px;
        border-radius: 2px;
        background: var(--neon);
        box-shadow: 0 0 12px rgba(67, 230, 255, 0.4);
    }
    .header-cta {
        margin-left: 8px;
        flex-shrink: 0;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        border-radius: var(--radius-sm);
        font-size: 14px;
        font-weight: 600;
        padding: 12px 22px;
        border: 1px solid transparent;
        transition: all 0.25s ease;
        min-height: 44px;
        line-height: 1.4;
    }
    .btn-cta {
        background: var(--gradient-cta);
        color: #fff;
        box-shadow: 0 4px 16px rgba(255, 123, 84, 0.3);
    }
    .btn-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 0 20px rgba(255, 123, 84, 0.45);
        color: #fff;
    }
    .btn-cta:active {
        transform: scale(0.98);
    }
    .btn-outline {
        background: transparent;
        border-color: rgba(255, 255, 255, 0.35);
        color: var(--text-title);
    }
    .btn-outline:hover {
        border-color: var(--neon);
        color: var(--neon);
        box-shadow: 0 0 16px rgba(67, 230, 255, 0.15);
        transform: translateY(-2px);
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: 0;
        padding: 8px;
        border-radius: 8px;
    }
    .nav-toggle span {
        width: 22px;
        height: 2px;
        background: var(--text-title);
        border-radius: 2px;
        transition: all 0.3s ease;
    }
    .nav-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== Page Hero ===== */
    .page-hero {
        padding: 140px 0 72px;
        background: radial-gradient(ellipse at top left, rgba(34, 211, 165, 0.12), transparent 52%),
            radial-gradient(ellipse at bottom right, rgba(67, 230, 255, 0.07), transparent 48%),
            var(--bg-body);
        position: relative;
        border-bottom: 1px solid var(--border-subtle);
        overflow: hidden;
        min-height: 35vh;
    }
    .page-hero .hero-bg {
        position: absolute;
        top: 0;
        right: 0;
        width: 50%;
        height: 100%;
        object-fit: cover;
        opacity: 0.13;
        pointer-events: none;
        border-radius: 0;
    }
    .page-hero .container {
        position: relative;
        z-index: 1;
    }
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--text-muted);
        margin-bottom: 24px;
        flex-wrap: wrap;
    }
    .breadcrumb a {
        color: var(--text-muted);
        transition: color 0.2s;
    }
    .breadcrumb a:hover {
        color: var(--primary);
    }
    .breadcrumb .sep {
        color: var(--text-muted);
        opacity: 0.5;
    }
    .breadcrumb .current {
        color: var(--text-body);
    }
    .hero-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        letter-spacing: 0.12em;
        color: var(--primary);
        border: 1px solid rgba(34, 211, 165, 0.3);
        background: rgba(34, 211, 165, 0.06);
        padding: 5px 14px;
        border-radius: 999px;
        margin-bottom: 20px;
        font-weight: 600;
    }
    .page-hero h1 {
        font-size: 44px;
        font-weight: 800;
        color: var(--text-title);
        letter-spacing: -0.02em;
        line-height: 1.2;
        margin-bottom: 18px;
    }
    .page-hero h1 .brand {
        background: var(--gradient-brand);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .hero-desc {
        font-size: 16px;
        color: var(--text-body);
        max-width: 580px;
        line-height: 1.8;
        margin-bottom: 28px;
    }
    .hero-actions {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }
    .hero-actions .btn {
        min-height: 46px;
        padding: 13px 26px;
    }

    /* ===== Value Section ===== */
    .value-section {
        padding: 96px 0;
        background: var(--bg-body);
    }
    .value-grid {
        display: grid;
        grid-template-columns: 1.05fr 0.95fr;
        gap: 64px;
        align-items: center;
    }
    .value-content .section-title {
        margin-bottom: 18px;
    }
    .value-content p {
        font-size: 15px;
        line-height: 1.85;
        margin-bottom: 18px;
        color: var(--text-body);
    }
    .value-list {
        margin-top: 24px;
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .value-list li {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.6;
    }
    .value-list li svg {
        flex-shrink: 0;
        margin-top: 3px;
        width: 18px;
        height: 18px;
    }
    .value-list li strong {
        color: var(--text-title);
        font-weight: 600;
    }
    .value-media {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border-subtle);
        box-shadow: var(--shadow-card);
    }
    .value-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        aspect-ratio: 4 / 3;
        transition: transform 0.4s ease;
    }
    .value-media:hover img {
        transform: scale(1.03);
    }
    .value-media::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 60%, rgba(8, 20, 22, 0.35) 100%);
        pointer-events: none;
        border-radius: var(--radius-lg);
    }
    .value-media .media-badge {
        position: absolute;
        left: 20px;
        bottom: 18px;
        z-index: 2;
        background: rgba(8, 20, 22, 0.75);
        backdrop-filter: blur(6px);
        border: 1px solid var(--border-neon);
        color: var(--text-title);
        font-size: 13px;
        padding: 8px 16px;
        border-radius: 999px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        box-shadow: 0 0 16px rgba(67, 230, 255, 0.2);
    }
    .media-badge .dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--primary);
        box-shadow: 0 0 8px var(--primary);
    }

    /* ===== Process Section ===== */
    .process-section {
        padding: 96px 0;
        background: var(--bg-deep);
        border-top: 1px solid var(--border-subtle);
        border-bottom: 1px solid var(--border-subtle);
        position: relative;
    }
    .process-section::before {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 600px;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--neon), transparent);
        opacity: 0.3;
    }
    .process-header {
        text-align: center;
        margin-bottom: 56px;
    }
    .process-header .section-title {
        padding-left: 0;
        display: inline-block;
    }
    .process-header .section-title::before {
        display: none;
    }
    .process-header .section-label {
        justify-content: center;
    }
    .process-header .section-desc {
        margin-left: auto;
        margin-right: auto;
    }
    .process-list {
        max-width: 900px;
        margin: 0 auto;
        position: relative;
    }
    .process-list::before {
        content: "";
        position: absolute;
        left: 28px;
        top: 0;
        bottom: 0;
        width: 2px;
        background: linear-gradient(180deg, var(--primary), var(--neon), transparent);
        opacity: 0.3;
        border-radius: 2px;
    }
    .process-item {
        position: relative;
        padding: 0 0 48px 80px;
    }
    .process-item:last-child {
        padding-bottom: 0;
    }
    .process-num {
        position: absolute;
        left: 0;
        top: 0;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: var(--bg-card);
        border: 1px solid var(--border-neon);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        font-weight: 800;
        font-family: var(--font-num);
        color: var(--neon);
        box-shadow: 0 0 18px rgba(67, 230, 255, 0.15);
        z-index: 1;
    }
    .process-item .step-card {
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: var(--radius-md);
        padding: 28px 32px;
        transition: all 0.3s ease;
    }
    .process-item .step-card:hover {
        border-color: var(--border-neon);
        background: var(--bg-card-hover);
        box-shadow: 0 0 20px rgba(67, 230, 255, 0.08);
        transform: translateY(-2px);
    }
    .process-item h3 {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-title);
        margin-bottom: 10px;
    }
    .process-item p {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.75;
    }

    /* ===== Data Section ===== */
    .data-section {
        padding: 96px 0;
        background: var(--bg-body);
    }
    .data-header {
        text-align: center;
        margin-bottom: 52px;
    }
    .data-header .section-title {
        padding-left: 0;
        display: inline-block;
    }
    .data-header .section-title::before {
        display: none;
    }
    .data-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .data-card {
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: var(--radius-lg);
        padding: 36px 32px;
        text-align: center;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
    }
    .data-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 60px;
        height: 2px;
        background: var(--gradient-brand);
        border-radius: 2px;
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    .data-card:hover {
        border-color: var(--border-neon);
        background: var(--bg-card-hover);
        box-shadow: 0 0 24px rgba(67, 230, 255, 0.08);
        transform: translateY(-4px);
    }
    .data-card:hover::before {
        opacity: 1;
    }
    .data-number {
        font-family: var(--font-num);
        font-size: 44px;
        font-weight: 800;
        line-height: 1.1;
        background: var(--gradient-brand);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        font-variant-numeric: tabular-nums;
        margin-bottom: 8px;
    }
    .data-unit {
        font-size: 16px;
        color: var(--text-muted);
        margin-left: 2px;
        background: none;
        -webkit-text-fill-color: var(--text-muted);
    }
    .data-label {
        font-size: 13px;
        color: var(--text-muted);
        letter-spacing: 0.04em;
    }
    .data-card:nth-child(2) .data-number {
        background: linear-gradient(135deg, #fff, #43E6FF);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .data-card:nth-child(4) .data-number {
        background: linear-gradient(135deg, #FF9E7A, #FF7B54);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    /* ===== CTA Section ===== */
    .cta-section {
        padding: 56px 0 96px;
        background: var(--bg-deep);
        position: relative;
    }
    .cta-card {
        background: linear-gradient(145deg, var(--bg-deep), var(--bg-card));
        border: 1px solid transparent;
        border-radius: var(--radius-lg);
        padding: 48px 56px;
        position: relative;
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
    }
    .cta-card::before {
        content: "";
        position: absolute;
        inset: 0;
        border-radius: var(--radius-lg);
        padding: 1px;
        background: linear-gradient(135deg, var(--primary), var(--neon), var(--secondary));
        -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
        -webkit-mask-composite: xor;
        mask-composite: exclude;
        pointer-events: none;
        opacity: 0.7;
    }
    .cta-card .cta-icon {
        position: absolute;
        right: -30px;
        bottom: -30px;
        width: 180px;
        height: 180px;
        opacity: 0.06;
        pointer-events: none;
    }
    .cta-text h2 {
        font-size: 26px;
        font-weight: 700;
        color: var(--text-title);
        margin-bottom: 10px;
        line-height: 1.3;
    }
    .cta-text p {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.7;
        max-width: 520px;
    }
    .cta-actions {
        display: flex;
        align-items: center;
        gap: 24px;
        flex-wrap: wrap;
        position: relative;
        z-index: 2;
    }
    .cta-phone {
        font-family: var(--font-num);
        font-size: 18px;
        font-weight: 700;
        color: var(--text-title);
        white-space: nowrap;
        letter-spacing: 0.02em;
    }
    .cta-phone span {
        display: block;
        font-size: 12px;
        font-weight: 400;
        color: var(--text-muted);
        letter-spacing: 0.08em;
        margin-bottom: 2px;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-deep);
        position: relative;
    }
    .footer-top-line {
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--neon), var(--secondary));
    }
    .footer-main {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
        gap: 48px;
        padding: 60px 0 48px;
    }
    .footer-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }
    .footer-logo .logo-text {
        font-size: 20px;
        font-weight: 800;
        color: var(--text-title);
    }
    .footer-logo .logo-text span {
        color: var(--primary);
    }
    .footer-brand p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.8;
        max-width: 280px;
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-title);
        margin-bottom: 20px;
    }
    .footer-col a,
    .footer-col span {
        display: block;
        font-size: 14px;
        color: var(--text-muted);
        line-height: 2;
        transition: color 0.25s ease;
    }
    .footer-col a:hover {
        color: var(--primary);
    }
    .footer-bottom {
        border-top: 1px solid var(--border-subtle);
        padding: 20px 0;
    }
    .footer-bottom-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 12px;
        color: var(--text-muted);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .value-grid {
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .value-media img {
            aspect-ratio: 16 / 10;
        }
        .data-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-main {
            grid-template-columns: 1fr 1fr;
            gap: 36px;
        }
        .main-nav {
            gap: 20px;
        }
    }
    @media (max-width: 768px) {
        .container {
            padding: 0 16px;
        }
        .site-header {
            height: 60px;
        }
        .nav-toggle {
            display: flex;
        }
        .main-nav {
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            flex-direction: column;
            align-items: flex-start;
            background: var(--bg-deep);
            padding: 24px;
            gap: 20px;
            border-bottom: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
            transform: translateY(-120%);
            opacity: 0;
            pointer-events: none;
            transition: all 0.35s ease;
            z-index: 999;
        }
        .main-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .main-nav .nav-link {
            font-size: 16px;
            width: 100%;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .main-nav .nav-link.active::after {
            bottom: 0;
        }
        .header-cta {
            display: none;
        }
        .page-hero {
            padding: 110px 0 56px;
        }
        .page-hero h1 {
            font-size: 32px;
        }
        .hero-desc {
            font-size: 15px;
        }
        .section {
            padding: 56px 0;
        }
        .value-section,
        .process-section,
        .data-section {
            padding: 56px 0;
        }
        .section-title {
            font-size: 26px;
        }
        .process-list::before {
            left: 20px;
        }
        .process-item {
            padding-left: 60px;
        }
        .process-num {
            width: 44px;
            height: 44px;
            font-size: 16px;
        }
        .cta-section {
            padding: 40px 0 64px;
        }
        .cta-card {
            padding: 36px 28px;
            flex-direction: column;
            align-items: flex-start;
        }
        .cta-phone {
            font-size: 16px;
        }
        .footer-main {
            grid-template-columns: 1fr;
            gap: 32px;
            padding: 40px 0 32px;
        }
    }
    @media (max-width: 480px) {
        .hero-actions {
            flex-direction: column;
            width: 100%;
        }
        .hero-actions .btn {
            width: 100%;
        }
        .data-grid {
            grid-template-columns: 1fr;
        }
        .process-item .step-card {
            padding: 20px 20px;
        }
        .cta-actions {
            width: 100%;
            flex-direction: column;
            align-items: flex-start;
        }
        .btn {
            width: 100%;
        }
    }