/* roulang page: index */
:root {
            --color-bg: #06060e;
            --color-bg-alt: #0a0a18;
            --color-surface: #0e0e22;
            --color-surface-light: #141430;
            --color-surface-hover: #1a1a3a;
            --color-primary: #00d4ff;
            --color-primary-glow: rgba(0, 212, 255, 0.35);
            --color-primary-subtle: rgba(0, 212, 255, 0.08);
            --color-accent: #b347ea;
            --color-accent-glow: rgba(179, 71, 234, 0.35);
            --color-accent-subtle: rgba(179, 71, 234, 0.08);
            --color-text: #e8e8f2;
            --color-text-heading: #f4f4ff;
            --color-text-muted: #8890b0;
            --color-text-weak: #5a6080;
            --color-border: #1c1c38;
            --color-border-light: #252545;
            --color-border-glow: rgba(0, 212, 255, 0.25);
            --color-success: #00e896;
            --color-warning: #ffb347;
            --color-danger: #ff4d6a;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50%;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
            --shadow-glow-sm: 0 0 16px var(--color-primary-glow);
            --shadow-glow-md: 0 0 32px var(--color-primary-glow), 0 0 8px rgba(0, 212, 255, 0.15);
            --shadow-glow-accent: 0 0 28px var(--color-accent-glow);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --max-width: 1240px;
            --nav-height: 68px;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }

        a:hover {
            color: #4de8ff;
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
        }

        a:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

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

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

        button:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

        h1, h2, h3, h4, h5, h6 {
            color: var(--color-text-heading);
            line-height: 1.3;
            font-weight: 700;
            margin-top: 0;
        }

        h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -0.02em; }
        h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); letter-spacing: -0.01em; }
        h3 { font-size: clamp(1.2rem, 2vw, 1.55rem); }
        h4 { font-size: 1.15rem; }

        p { margin: 0 0 1rem; }
        p:last-child { margin-bottom: 0; }

        ul, ol { padding-left: 1.5rem; margin: 0 0 1rem; }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container--narrow {
            max-width: 900px;
        }

        .section {
            padding: 70px 0;
            position: relative;
        }

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

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

        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-primary);
            margin-bottom: 10px;
            padding: 4px 14px;
            border: 1px solid var(--color-border-glow);
            border-radius: 20px;
            background: var(--color-primary-subtle);
        }

        .section__title {
            margin-bottom: 12px;
            font-weight: 800;
            color: var(--color-text-heading);
        }

        .section__subtitle {
            color: var(--color-text-muted);
            font-size: 1.05rem;
            max-width: 620px;
            margin: 0 auto 40px;
            line-height: 1.65;
        }

        .section__title--center,
        .section__subtitle--center {
            text-align: center;
        }

        .section__subtitle--center {
            margin-left: auto;
            margin-right: auto;
        }

        .gradient-text {
            background: linear-gradient(135deg, #00d4ff 0%, #8b5cf6 45%, #b347ea 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* ============ HEADER / NAVIGATION ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 10, 24, 0.85);
            backdrop-filter: blur(18px) saturate(140%);
            -webkit-backdrop-filter: blur(18px) saturate(140%);
            border-bottom: 1px solid var(--color-border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(6, 6, 16, 0.94);
            border-bottom-color: var(--color-border-glow);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            height: 100%;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text-heading);
            letter-spacing: -0.01em;
            white-space: nowrap;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .header-logo:hover {
            color: var(--color-primary);
            text-shadow: 0 0 20px var(--color-primary-glow);
        }

        .header-logo__icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, #00d4ff 0%, #8b5cf6 60%, #b347ea 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.35);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .header-nav__item {
            position: relative;
        }

        .header-nav__link {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 10px 16px;
            border-radius: var(--radius-md);
            color: var(--color-text);
            font-weight: 600;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
            background: transparent;
            border: none;
        }

        .header-nav__link:hover,
        .header-nav__link--active {
            color: var(--color-primary);
            background: var(--color-primary-subtle);
        }

        .header-nav__link--active {
            font-weight: 700;
        }

        .header-nav__link .fa-chevron-down {
            font-size: 0.65rem;
            transition: transform var(--transition-fast);
        }

        .header-nav__item--mega:hover .header-nav__link .fa-chevron-down {
            transform: rotate(180deg);
        }

        /* Mega Menu Panel */
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: rgba(14, 14, 34, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            min-width: 520px;
            display: flex;
            gap: 32px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-base);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 0 1px var(--color-border-glow);
            z-index: 999;
        }

        .header-nav__item--mega:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }

        .mega-panel__col {
            flex: 1;
            min-width: 0;
        }

        .mega-panel__title {
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--color-text-weak);
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--color-border);
        }

        .mega-panel__links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mega-panel__links a {
            display: block;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            color: var(--color-text);
            font-size: 0.9rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition-fast);
        }

        .mega-panel__links a:hover {
            background: var(--color-primary-subtle);
            color: var(--color-primary);
        }

        .mega-panel__card {
            background: var(--color-surface-light);
            border-radius: var(--radius-md);
            padding: 16px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }

        .mega-panel__card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-glow-sm);
        }

        .mega-panel__card img {
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }

        .mega-panel__card span {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-text);
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-text);
            font-size: 1.6rem;
            padding: 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast);
            line-height: 1;
        }

        .nav-toggle:hover {
            color: var(--color-primary);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(8, 8, 20, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 998;
            padding: 20px;
            flex-direction: column;
            gap: 6px;
            overflow-y: auto;
        }

        .mobile-nav.active {
            display: flex;
        }

        .mobile-nav__link {
            display: block;
            padding: 14px 18px;
            border-radius: var(--radius-md);
            color: var(--color-text);
            font-weight: 600;
            font-size: 1.05rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
        }

        .mobile-nav__link:hover,
        .mobile-nav__link--active {
            color: var(--color-primary);
            background: var(--color-primary-subtle);
            border-color: var(--color-border-glow);
        }

        .mobile-nav__link--active {
            font-weight: 700;
        }

        /* ============ HERO ============ */
        .hero {
            position: relative;
            padding: 80px 0 90px;
            background-color: var(--color-bg);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            min-height: 580px;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(6, 6, 14, 0.55) 0%, rgba(6, 6, 14, 0.82) 40%, rgba(6, 6, 14, 0.92) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background:
                radial-gradient(ellipse at 25% 30%, rgba(0, 212, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 70% 60%, rgba(179, 71, 234, 0.06) 0%, transparent 55%);
            z-index: 1;
            pointer-events: none;
        }

        .hero__content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }

        .hero__badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--color-primary);
            border: 1px solid var(--color-border-glow);
            background: var(--color-primary-subtle);
            margin-bottom: 18px;
        }

        .hero__title {
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 18px;
            color: var(--color-text-heading);
        }

        .hero__title .highlight {
            background: linear-gradient(135deg, #00d4ff 0%, #8b5cf6 50%, #b347ea 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero__desc {
            font-size: 1.1rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 540px;
        }

        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
            border: 2px solid transparent;
            letter-spacing: 0.01em;
        }

        .btn--primary {
            background: linear-gradient(135deg, #00c8f0 0%, #7c3aed 100%);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 20px rgba(0, 200, 240, 0.3);
        }

        .btn--primary:hover {
            box-shadow: 0 6px 32px rgba(0, 200, 240, 0.5), 0 0 40px rgba(124, 58, 237, 0.25);
            transform: translateY(-2px);
            color: #fff;
            text-shadow: none;
        }

        .btn--outline {
            background: transparent;
            color: var(--color-text);
            border-color: var(--color-border-light);
        }

        .btn--outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-subtle);
            box-shadow: var(--shadow-glow-sm);
            text-shadow: none;
        }

        .btn--sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        .btn--lg {
            padding: 15px 34px;
            font-size: 1.05rem;
            border-radius: var(--radius-lg);
        }

        /* ============ STATS BAR ============ */
        .stats-bar {
            padding: 32px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            position: relative;
            z-index: 3;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item__number {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 900;
            letter-spacing: -0.02em;
            color: var(--color-text-heading);
            line-height: 1;
            margin-bottom: 6px;
        }

        .stat-item__number .counter-accent {
            color: var(--color-primary);
        }

        .stat-item__label {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ============ SERVICES SECTION ============ */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .service-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-glow-sm), var(--shadow-md);
            transform: translateY(-4px);
            background: var(--color-surface-hover);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-card__icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-full);
            background: var(--color-primary-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--color-primary);
            margin: 0 auto 18px;
            transition: all var(--transition-base);
        }

        .service-card:hover .service-card__icon {
            box-shadow: var(--shadow-glow-sm);
            background: rgba(0, 212, 255, 0.15);
        }

        .service-card__title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text-heading);
        }

        .service-card__desc {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        .service-card__img {
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }

        /* ============ NEWS / CMS SECTION ============ */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            transition: all var(--transition-base);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }

        .news-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-glow-sm);
            transform: translateY(-2px);
            background: var(--color-surface-hover);
        }

        .news-card__thumb {
            width: 90px;
            height: 70px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-surface-light);
        }

        .news-card__body {
            flex: 1;
            min-width: 0;
        }

        .news-card__title {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card__title a {
            color: inherit;
            text-decoration: none;
        }

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

        .news-card__meta {
            font-size: 0.8rem;
            color: var(--color-text-weak);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-card--empty {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            grid-column: 1 / -1;
            text-align: center;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }

        /* ============ SOLUTIONS SECTION ============ */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .solution-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 30px;
            transition: all var(--transition-base);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .solution-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-glow-sm);
            transform: translateY(-3px);
            background: var(--color-surface-hover);
        }

        .solution-card__num {
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(0, 212, 255, 0.18);
            line-height: 1;
            flex-shrink: 0;
            min-width: 50px;
        }

        .solution-card__body h4 {
            margin-bottom: 6px;
            font-weight: 700;
        }

        .solution-card__body p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin: 0;
        }

        /* ============ PARTNERS ============ */
        .partners-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 36px 48px;
        }

        .partner-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
            letter-spacing: 0.03em;
            opacity: 0.55;
            filter: grayscale(40%);
        }

        .partner-logo:hover {
            color: var(--color-primary);
            opacity: 1;
            filter: grayscale(0%);
            text-shadow: var(--shadow-glow-sm);
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

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

        .faq-item__q {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: none;
            border: none;
            color: var(--color-text-heading);
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: color var(--transition-fast);
        }

        .faq-item__q:hover {
            color: var(--color-primary);
        }

        .faq-item__q i {
            transition: transform var(--transition-fast);
            font-size: 0.8rem;
            color: var(--color-text-weak);
            flex-shrink: 0;
        }

        .faq-item.open .faq-item__q i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-item__a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 22px;
            color: var(--color-text-muted);
            font-size: 0.93rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-item__a {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* ============ CTA SECTION ============ */
        .cta-section {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.04) 0%, transparent 60%);
            pointer-events: none;
            z-index: 1;
        }

        .cta-section__content {
            position: relative;
            z-index: 2;
        }

        .cta-section__title {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .cta-section__desc {
            color: var(--color-text-muted);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-bg-alt);
            border-top: 1px solid var(--color-border);
            padding: 44px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 30px;
        }

        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--color-text-heading);
            margin-bottom: 8px;
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        .footer-col h4 {
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-text-weak);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--color-text-weak);
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .mega-panel {
                min-width: 400px;
                gap: 20px;
                padding: 20px 22px;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .hero {
                padding: 50px 0 60px;
                min-height: 440px;
            }
            .hero__title {
                font-size: 1.8rem;
            }
            .hero__desc {
                font-size: 0.95rem;
            }
            .hero__actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero__actions .btn {
                width: 100%;
                justify-content: center;
            }
            .section {
                padding: 44px 0;
            }
            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .solutions-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .news-card {
                flex-direction: column;
                gap: 12px;
            }
            .news-card__thumb {
                width: 100%;
                height: 140px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section {
                padding: 32px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section__title {
                font-size: 1.4rem;
            }
            .partners-row {
                gap: 20px 28px;
            }
            .partner-logo {
                font-size: 1rem;
            }
            .mega-panel {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .hero {
                padding: 36px 0 44px;
                min-height: 380px;
            }
            .hero__title {
                font-size: 1.5rem;
            }
            .hero__badge {
                font-size: 0.72rem;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.88rem;
            }
            .service-card {
                padding: 22px 16px;
            }
            .solution-card {
                padding: 20px 16px;
                flex-direction: column;
                gap: 10px;
            }
            .solution-card__num {
                font-size: 2rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item__number {
                font-size: 1.5rem;
            }
            .section {
                padding: 34px 0;
            }
            .faq-item__q {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-item__a {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .faq-item.open .faq-item__a {
                padding: 0 16px 16px;
            }
        }

        /* Utility */
        .text-center { text-align: center; }
        .mb-0 { margin-bottom: 0; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mt-0 { margin-top: 0; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }

/* roulang page: article */
:root {
            --color-primary: #00e5ff;
            --color-primary-glow: rgba(0, 229, 255, 0.45);
            --color-primary-deep: #009faf;
            --color-accent: #b347ea;
            --color-accent-glow: rgba(179, 71, 234, 0.4);
            --color-highlight: #00ff88;
            --color-bg-dark: #060b14;
            --color-bg-panel: #0d1421;
            --color-bg-card: #111827;
            --color-bg-elevated: #161f33;
            --color-text-primary: #e8ecf2;
            --color-text-secondary: #a8b5c8;
            --color-text-muted: #6b7d95;
            --color-border: #1e2d44;
            --color-border-light: #263550;
            --color-border-glow: rgba(0, 229, 255, 0.3);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 6px 22px rgba(0, 0, 0, 0.45);
            --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.55);
            --shadow-glow: 0 0 28px rgba(0, 229, 255, 0.18);
            --shadow-glow-accent: 0 0 24px rgba(179, 71, 234, 0.16);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
            --max-width: 1260px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-body);
            background: var(--color-bg-dark);
            color: var(--color-text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
        a:hover { color: var(--color-highlight); text-decoration: none; }
        a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: 3px; }

        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; padding: 0; margin: 0; }

        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

        /* ============ HEADER & NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 16, 28, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 2px 18px rgba(0, 0, 0, 0.4);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text-primary);
            text-decoration: none;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .header-logo:hover { color: var(--color-primary); }
        .header-logo__icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary-deep), var(--color-accent));
            color: #fff;
            font-size: 1.1rem;
            box-shadow: var(--shadow-glow);
            flex-shrink: 0;
        }

        .header-nav { display: flex; align-items: center; gap: 4px; list-style: none; }
        .header-nav__item { position: relative; }
        .header-nav__link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            color: var(--color-text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .header-nav__link:hover { color: var(--color-primary); background: rgba(0, 229, 255, 0.06); }
        .header-nav__link--active { color: var(--color-primary); background: rgba(0, 229, 255, 0.08); font-weight: 600; }
        .header-nav__link i { font-size: 0.7rem; transition: transform var(--transition-fast); }
        .header-nav__item--mega:hover .header-nav__link i { transform: rotate(180deg); }

        /* Mega Panel */
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(6px);
            background: var(--color-bg-panel);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 22px 26px;
            display: flex;
            gap: 30px;
            min-width: 520px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            z-index: 999;
        }
        .header-nav__item--mega:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(2px);
        }
        .mega-panel__col { flex: 1; min-width: 0; }
        .mega-panel__title {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-primary);
            font-weight: 700;
            margin-bottom: 10px;
        }
        .mega-panel__links li { margin-bottom: 4px; }
        .mega-panel__links a {
            display: block;
            padding: 7px 10px;
            border-radius: 6px;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .mega-panel__links a:hover { color: var(--color-primary); background: rgba(0, 229, 255, 0.06); }
        .mega-panel__card {
            display: block;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-align: center;
        }
        .mega-panel__card:hover { border-color: var(--color-border-glow); box-shadow: var(--shadow-glow); }
        .mega-panel__card img { width: 100%; height: 90px; object-fit: cover; }
        .mega-panel__card span {
            display: block;
            padding: 10px;
            font-size: 0.85rem;
            color: var(--color-primary);
            font-weight: 500;
        }

        /* Mobile Nav Toggle */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-nav-toggle:hover { background: rgba(255, 255, 255, 0.06); }

        /* ============ ARTICLE HERO ============ */
        .article-hero {
            position: relative;
            padding: 60px 0 50px;
            background: linear-gradient(180deg, #0d1a2d 0%, var(--color-bg-dark) 100%);
            border-bottom: 1px solid var(--color-border);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 340px;
            height: 340px;
            background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            opacity: 0.5;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            opacity: 0.35;
        }
        .article-hero__inner {
            position: relative;
            z-index: 1;
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
            text-align: center;
        }
        .article-hero__category {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(0, 229, 255, 0.1);
            color: var(--color-primary);
            border: 1px solid var(--color-border-glow);
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .article-hero__title {
            font-family: var(--font-heading);
            font-size: 2.4rem;
            font-weight: 700;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .article-hero__meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--color-text-muted);
            font-size: 0.9rem;
        }
        .article-hero__meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero__meta i { color: var(--color-primary); font-size: 0.85rem; }

        /* ============ ARTICLE CONTENT ============ */
        .article-content-section {
            padding: 50px 0 56px;
        }
        .article-content-wrapper {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .article-body {
            background: var(--color-bg-panel);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
            line-height: 1.85;
            font-size: 1.05rem;
            color: var(--color-text-primary);
        }
        .article-body h2 {
            font-family: var(--font-heading);
            font-size: 1.55rem;
            font-weight: 700;
            color: #ffffff;
            margin: 32px 0 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-border-light);
        }
        .article-body h3 {
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--color-primary);
            margin: 22px 0 10px;
        }
        .article-body p { margin-bottom: 16px; }
        .article-body ul, .article-body ol { margin: 12px 0 16px 20px; }
        .article-body li { margin-bottom: 6px; list-style: disc; }
        .article-body ol li { list-style: decimal; }
        .article-body img { border-radius: var(--radius-md); margin: 20px 0; box-shadow: var(--shadow-sm); }
        .article-body blockquote {
            border-left: 4px solid var(--color-primary);
            background: rgba(0, 229, 255, 0.04);
            padding: 16px 22px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-secondary);
            font-style: italic;
        }
        .article-body code {
            background: var(--color-bg-elevated);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--color-highlight);
            border: 1px solid var(--color-border);
        }
        .article-body pre {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            overflow-x: auto;
            margin: 18px 0;
            font-size: 0.9rem;
        }

        .article-not-found {
            text-align: center;
            padding: 70px 30px;
            background: var(--color-bg-panel);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
        }
        .article-not-found__icon {
            font-size: 3.5rem;
            color: var(--color-text-muted);
            margin-bottom: 18px;
        }
        .article-not-found h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            color: var(--color-text-primary);
            margin-bottom: 10px;
        }
        .article-not-found p { color: var(--color-text-secondary); margin-bottom: 20px; }
        .article-not-found .btn-back {
            display: inline-block;
            padding: 11px 26px;
            border-radius: var(--radius-sm);
            background: var(--color-primary-deep);
            color: #fff;
            font-weight: 600;
            transition: all var(--transition-base);
        }
        .article-not-found .btn-back:hover {
            background: var(--color-primary);
            box-shadow: var(--shadow-glow);
            color: #fff;
        }

        /* ============ RELATED ARTICLES ============ */
        .related-section {
            padding: 50px 0 60px;
            background: var(--color-bg-panel);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .related-section__title {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            color: #ffffff;
            text-align: center;
            margin-bottom: 36px;
            letter-spacing: 0.03em;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .related-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-md), var(--shadow-glow);
            transform: translateY(-3px);
        }
        .related-card__img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card__body { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
        .related-card__tag {
            display: inline-block;
            font-size: 0.75rem;
            color: var(--color-primary);
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }
        .related-card__title {
            font-family: var(--font-heading);
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }
        .related-card:hover .related-card__title { color: var(--color-primary); }
        .related-card__desc {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.5;
            flex: 1;
        }
        .related-card__link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-top: 12px;
            color: var(--color-primary);
            transition: gap var(--transition-fast);
        }
        .related-card:hover .related-card__link { gap: 10px; color: var(--color-highlight); }

        /* ============ CTA SECTION ============ */
        .cta-section {
            padding: 56px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            background: linear-gradient(180deg, var(--color-bg-dark) 0%, #0d1a2d 100%);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            opacity: 0.3;
        }
        .cta-section__inner { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; padding: 0 24px; }
        .cta-section__title {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .cta-section__desc { color: var(--color-text-secondary); font-size: 1.05rem; margin-bottom: 26px; line-height: 1.6; }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 32px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.03em;
            background: linear-gradient(135deg, var(--color-primary-deep), var(--color-accent));
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-glow);
            text-decoration: none;
        }
        .btn-cta:hover {
            box-shadow: var(--shadow-lg), var(--shadow-glow-accent);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-cta--outline {
            background: transparent;
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
            box-shadow: none;
            margin-left: 12px;
        }
        .btn-cta--outline:hover { background: rgba(0, 229, 255, 0.08); box-shadow: var(--shadow-glow); color: var(--color-primary); }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-bg-panel);
            border-top: 1px solid var(--color-border);
            padding: 50px 0 28px;
            color: var(--color-text-secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 34px;
            margin-bottom: 36px;
        }
        .footer-brand { font-family: var(--font-heading); font-size: 1.3rem; font-weight: 700; color: #ffffff; margin-bottom: 10px; }
        .footer-desc { font-size: 0.9rem; line-height: 1.6; color: var(--color-text-muted); max-width: 280px; }
        .footer-col h4 { font-size: 0.85rem; font-weight: 700; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 14px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul a { color: var(--color-text-muted); font-size: 0.9rem; transition: color var(--transition-fast); }
        .footer-col ul a:hover { color: var(--color-primary); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            padding-top: 22px;
            border-top: 1px solid var(--color-border-light);
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }

        /* ============ SHARE BAR ============ */
        .share-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid var(--color-border-light);
        }
        .share-bar__label { font-size: 0.85rem; color: var(--color-text-muted); font-weight: 500; }
        .share-bar__btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-bg-elevated);
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
            font-size: 0.9rem;
        }
        .share-bar__btn:hover { background: var(--color-primary-deep); color: #fff; border-color: var(--color-primary); box-shadow: var(--shadow-glow); }

        /* ============ RESPONSIVE ============ */
        @media screen and (max-width: 1024px) {
            .article-hero__title { font-size: 1.9rem; }
            .related-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .mega-panel { min-width: 400px; padding: 16px 20px; gap: 18px; }
            .article-body { padding: 28px 24px; }
        }

        @media screen and (max-width: 768px) {
            :root { --header-height: 60px; }
            .header-inner { padding: 0 16px; }
            .header-logo { font-size: 1.15rem; }
            .header-logo__icon { width: 34px; height: 34px; font-size: 0.95rem; }

            .mobile-nav-toggle { display: block; }
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 16, 28, 0.97);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px;
                gap: 2px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-base);
                z-index: 999;
            }
            .header-nav--open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .header-nav__link { width: 100%; padding: 13px 16px; font-size: 1rem; }
            .mega-panel {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                min-width: auto;
                flex-direction: column;
                gap: 14px;
                padding: 12px 16px;
                margin-top: 4px;
                background: var(--color-bg-card);
                border-radius: var(--radius-md);
                display: none;
            }
            .header-nav__item--mega:hover .mega-panel,
            .header-nav__item--mega.mega-open .mega-panel { display: flex; }
            .mega-panel__card img { height: 60px; }
            .header-nav__item--mega .header-nav__link i { display: none; }

            .article-hero { padding: 40px 0 34px; }
            .article-hero__title { font-size: 1.5rem; }
            .article-hero__meta { gap: 12px; font-size: 0.82rem; }
            .article-content-section { padding: 32px 0 36px; }
            .article-body { padding: 22px 18px; font-size: 0.98rem; border-radius: var(--radius-md); }
            .article-body h2 { font-size: 1.3rem; }
            .article-body h3 { font-size: 1.1rem; }

            .related-grid { grid-template-columns: 1fr; gap: 16px; padding: 0 16px; }
            .related-section__title { font-size: 1.35rem; margin-bottom: 24px; }
            .related-card__img { height: 150px; }

            .cta-section__title { font-size: 1.4rem; }
            .btn-cta--outline { margin-left: 0; margin-top: 10px; }
            .cta-section__inner .btn-cta { display: block; width: 100%; text-align: center; }
            .cta-section__inner .btn-cta--outline { margin-left: 0; }

            .footer-grid { grid-template-columns: 1fr; gap: 22px; }
            .footer-desc { max-width: 100%; }
            .footer-bottom { flex-direction: column; text-align: center; gap: 6px; }

            .share-bar { flex-wrap: wrap; justify-content: center; }
        }

        @media screen and (max-width: 520px) {
            .container { padding: 0 14px; }
            .article-hero__title { font-size: 1.3rem; }
            .article-hero__meta { font-size: 0.78rem; gap: 8px; }
            .article-body { padding: 16px 14px; font-size: 0.93rem; }
            .article-body blockquote { padding: 12px 16px; font-size: 0.9rem; }
            .related-section { padding: 34px 0 40px; }
            .cta-section { padding: 38px 0; }
            .site-footer { padding: 34px 0 20px; }
        }

/* roulang page: category1 */
:root {
            --color-bg-deep: #060b1f;
            --color-bg-panel: #0d1335;
            --color-bg-card: #111840;
            --color-bg-card-hover: #161e52;
            --color-accent: #00e5ff;
            --color-accent-glow: rgba(0, 229, 255, 0.35);
            --color-accent-soft: rgba(0, 229, 255, 0.08);
            --color-purple: #8b5cf6;
            --color-purple-glow: rgba(139, 92, 246, 0.3);
            --color-text-primary: #f1f3f9;
            --color-text-secondary: #b0b8d0;
            --color-text-muted: #7a839e;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-light: rgba(255, 255, 255, 0.14);
            --color-white: #ffffff;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 40px rgba(0, 229, 255, 0.18), 0 4px 28px rgba(0, 0, 0, 0.45);
            --shadow-btn: 0 4px 18px rgba(0, 229, 255, 0.3);
            --shadow-btn-hover: 0 8px 32px rgba(0, 229, 255, 0.5);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text-primary);
            background-color: var(--color-bg-deep);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            margin: 0;
            color: var(--color-white);
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container--narrow {
            max-width: 960px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(6, 11, 31, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition-smooth);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
            height: 66px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-white);
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }
        .header-logo:hover {
            color: var(--color-white);
            opacity: 0.85;
        }
        .header-logo__icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
            color: var(--color-bg-deep);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-nav__item {
            position: relative;
        }
        .header-nav__link {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .header-nav__link:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.05);
        }
        .header-nav__link--active {
            color: var(--color-accent) !important;
            background: var(--color-accent-soft);
            font-weight: 600;
        }
        .header-nav__link i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }
        .header-nav__item--mega:hover .header-nav__link i {
            transform: rotate(180deg);
        }
        .header-nav__item--mega:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            pointer-events: auto;
        }
        .mega-panel {
            position: absolute;
            top: calc(100% + 12px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--color-bg-panel);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            display: flex;
            gap: 32px;
            min-width: 480px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55);
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-smooth);
            z-index: 1001;
        }
        .mega-panel__col {
            flex: 1;
        }
        .mega-panel__title {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-accent);
            margin-bottom: 12px;
            font-weight: 600;
        }
        .mega-panel__links li {
            margin-bottom: 6px;
        }
        .mega-panel__links a {
            display: block;
            padding: 7px 10px;
            border-radius: 6px;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
        }
        .mega-panel__links a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.05);
        }
        .mega-panel__card {
            display: block;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }
        .mega-panel__card:hover {
            border-color: var(--color-accent);
            box-shadow: 0 0 20px var(--color-accent-glow);
        }
        .mega-panel__card img {
            width: 100%;
            height: 80px;
            object-fit: cover;
        }
        .mega-panel__card span {
            display: block;
            padding: 10px 12px;
            font-size: 0.85rem;
            color: var(--color-accent);
            font-weight: 500;
        }
        .header-mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 6px;
            line-height: 1;
        }

        /* ========== HERO ========== */
        .page-hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 140px 24px 90px;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(6, 11, 31, 0.72) 0%, rgba(6, 11, 31, 0.88) 60%, var(--color-bg-deep) 100%);
            z-index: 1;
        }
        .page-hero__content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .page-hero__badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            background: var(--color-accent-soft);
            border: 1px solid rgba(0, 229, 255, 0.2);
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }
        .page-hero__title {
            font-size: 3rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }
        .page-hero__title span {
            background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero__desc {
            font-size: 1.15rem;
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .page-hero__actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .btn--primary {
            background: linear-gradient(135deg, var(--color-accent), #00c8e0);
            color: #060b1f;
            box-shadow: var(--shadow-btn);
        }
        .btn--primary:hover {
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
            color: #060b1f;
        }
        .btn--outline {
            background: transparent;
            color: var(--color-white);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn--outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: var(--color-accent-soft);
        }
        .btn--ghost {
            background: rgba(255, 255, 255, 0.04);
            color: var(--color-accent);
            border: 1px solid rgba(0, 229, 255, 0.25);
        }
        .btn--ghost:hover {
            background: var(--color-accent-soft);
            border-color: var(--color-accent);
            box-shadow: 0 0 18px var(--color-accent-glow);
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 80px 0;
        }
        .section--dark {
            background: var(--color-bg-deep);
        }
        .section--panel {
            background: var(--color-bg-panel);
        }
        .section__header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section__title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .section__subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* ========== SERVICE CARDS ========== */
        .service-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 28px 28px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-purple));
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .service-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-6px);
            background: var(--color-bg-card-hover);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card__icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 18px;
            flex-shrink: 0;
        }
        .service-card__icon-wrap--cyan {
            background: rgba(0, 229, 255, 0.12);
            color: var(--color-accent);
        }
        .service-card__icon-wrap--purple {
            background: rgba(139, 92, 246, 0.12);
            color: var(--color-purple);
        }
        .service-card__icon-wrap--green {
            background: rgba(34, 211, 238, 0.12);
            color: #22d3ee;
        }
        .service-card__icon-wrap--amber {
            background: rgba(251, 191, 36, 0.12);
            color: #fbbf24;
        }
        .service-card__title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 8px;
        }
        .service-card__desc {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.65;
            flex-grow: 1;
            margin-bottom: 16px;
        }
        .service-card__link {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast);
        }
        .service-card__link:hover {
            gap: 12px;
            color: #00f0ff;
        }
        .service-card__img {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 20px;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            width: 100%;
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .scenario-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            transition: all var(--transition-smooth);
        }
        .scenario-card:hover {
            border-color: var(--color-accent);
            box-shadow: 0 0 28px var(--color-accent-glow);
            transform: translateY(-4px);
        }
        .scenario-card__icon {
            font-size: 2rem;
            margin-bottom: 14px;
            display: block;
        }
        .scenario-card__title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 6px;
        }
        .scenario-card__desc {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.55;
        }

        /* ========== PROCESS / TIMELINE ========== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: 0 12px;
        }
        .process-step__num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
            color: var(--color-bg-deep);
            font-size: 1.4rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            position: relative;
            z-index: 2;
            box-shadow: 0 0 24px var(--color-purple-glow);
        }
        .process-step__title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 6px;
        }
        .process-step__desc {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.55;
        }
        .process-connector {
            position: absolute;
            top: 28px;
            left: calc(25% + 28px);
            right: calc(25% + 28px);
            height: 2px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-purple));
            opacity: 0.3;
            z-index: 1;
            display: block;
        }

        /* ========== STATS BAR ========== */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }
        .stat-item:hover {
            border-color: var(--color-accent);
            box-shadow: 0 0 20px var(--color-accent-glow);
        }
        .stat-item__value {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-accent), #fff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 8px;
        }
        .stat-item__label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-item summary {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-white);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.75rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-item[open] {
            border-color: var(--color-accent);
            box-shadow: 0 0 16px var(--color-accent-glow);
        }
        .faq-item__answer {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            position: relative;
            text-align: center;
            padding: 90px 24px;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            margin: 0 24px;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 16, 50, 0.82);
            z-index: 1;
        }
        .cta-section__inner {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-section__title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 14px;
        }
        .cta-section__desc {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-bg-panel);
            border-top: 1px solid var(--color-border);
            padding: 60px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 20px;
            border-top: 1px solid var(--color-border);
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }

        /* ========== CASE LIST (PHP CMS 区域) ========== */
        .case-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .case-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .case-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .case-card__img {
            aspect-ratio: 16 / 9;
            object-fit: cover;
            width: 100%;
        }
        .case-card__body {
            padding: 18px;
        }
        .case-card__tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 50px;
            background: var(--color-accent-soft);
            color: var(--color-accent);
            margin-bottom: 8px;
        }
        .case-card__title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 4px;
        }
        .case-card__desc {
            font-size: 0.84rem;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .header-nav__link {
                padding: 8px 12px;
                font-size: 0.88rem;
            }
            .mega-panel {
                min-width: 400px;
                gap: 20px;
                padding: 20px;
            }
            .page-hero__title {
                font-size: 2.4rem;
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 20px;
            }
            .process-connector {
                display: none;
            }
            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .case-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-section {
                margin: 0 16px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 58px;
            }
            .header-nav {
                display: none;
                position: absolute;
                top: 58px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: var(--color-bg-panel);
                border-bottom: 1px solid var(--color-border-light);
                padding: 16px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
                z-index: 999;
            }
            .header-nav--open {
                display: flex;
            }
            .header-nav__link {
                width: 100%;
                justify-content: flex-start;
                padding: 12px 14px;
                border-radius: 8px;
                font-size: 0.95rem;
            }
            .mega-panel {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                min-width: auto;
                flex-direction: column;
                gap: 16px;
                border: none;
                background: transparent;
                box-shadow: none;
                padding: 8px 0 8px 16px;
            }
            .header-nav__item--mega:hover .mega-panel {
                display: block;
            }
            .mega-panel {
                display: none;
            }
            .header-nav__item--mega.header-nav__item--open .mega-panel {
                display: flex;
            }
            .header-mobile-toggle {
                display: block;
            }
            .page-hero {
                min-height: 400px;
                padding: 110px 20px 70px;
            }
            .page-hero__title {
                font-size: 1.9rem;
            }
            .page-hero__desc {
                font-size: 1rem;
            }
            .section {
                padding: 56px 0;
            }
            .section__title {
                font-size: 1.7rem;
            }
            .scenario-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 28px 16px;
            }
            .stats-bar {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-item__value {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .case-list-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                margin: 0 12px;
                padding: 60px 18px;
                border-radius: var(--radius-lg);
            }
            .cta-section__title {
                font-size: 1.5rem;
            }
            .btn {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero__title {
                font-size: 1.55rem;
            }
            .page-hero__desc {
                font-size: 0.9rem;
            }
            .page-hero__actions {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .stats-bar {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .section__title {
                font-size: 1.45rem;
            }
            .container {
                padding: 0 14px;
            }
        }

        /* Foundation 覆盖 */
        .grid-x {
            margin: 0;
        }
        .cell {
            padding: 0;
        }

/* roulang page: category2 */
/* ==================== 设计变量 ==================== */
        :root {
            --color-primary: #0d1117;
            --color-primary-light: #161b22;
            --color-accent: #00e5ff;
            --color-accent-glow: rgba(0, 229, 255, 0.45);
            --color-accent-strong: #00b8d4;
            --color-purple: #7c4dff;
            --color-purple-glow: rgba(124, 77, 255, 0.5);
            --color-white: #ffffff;
            --color-text: #1a1a2e;
            --color-text-light: #4a4a5e;
            --color-text-muted: #6b7280;
            --color-text-on-dark: #e0e0e0;
            --color-bg: #fafbfc;
            --color-bg-alt: #f0f2f5;
            --color-border: #e2e8f0;
            --color-border-light: #eef1f4;
            --color-card-bg: #ffffff;
            --color-dark-panel: #0d1117;
            --color-dark-panel-alt: #161b22;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.25);
            --shadow-purple-glow: 0 0 30px rgba(124, 77, 255, 0.3);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
            --transition-fast: 0.18s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.5s ease;
            --header-height: 68px;
        }

        /* ==================== 基础 Reset ==================== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            min-width: 320px;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            line-height: 1.25;
            font-weight: 700;
            color: inherit;
        }
        p {
            margin: 0 0 var(--spacing-md);
        }
        p:last-child {
            margin-bottom: 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .container--narrow {
            max-width: 900px;
        }
        .section {
            padding: var(--spacing-3xl) 0;
        }
        .section--dark {
            background-color: var(--color-dark-panel);
            color: var(--color-text-on-dark);
        }
        .section--alt {
            background-color: var(--color-bg-alt);
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent-strong);
            margin-bottom: var(--spacing-sm);
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.2);
        }
        .section--dark .section__label {
            color: var(--color-accent);
            background: rgba(0, 229, 255, 0.12);
            border-color: rgba(0, 229, 255, 0.3);
        }
        .section__title {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.5px;
            color: var(--color-text);
        }
        .section--dark .section__title {
            color: var(--color-white);
        }
        .section__subtitle {
            font-size: 1.1rem;
            color: var(--color-text-muted);
            max-width: 680px;
            margin: 0 auto var(--spacing-xl);
            line-height: 1.7;
        }
        .section--dark .section__subtitle {
            color: #a0a8b8;
        }
        .text-center {
            text-align: center;
        }

        /* ==================== Header / 导航 ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-normal);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.1);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
            padding: 0 20px;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .header-logo:hover {
            color: var(--color-accent-strong);
        }
        .header-logo__icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 14px rgba(0, 229, 255, 0.35);
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .header-nav__item {
            position: relative;
        }
        .header-nav__link {
            display: flex;
            align-items: center;
            gap: 5px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-light);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .header-nav__link:hover {
            color: var(--color-accent-strong);
            background: rgba(0, 229, 255, 0.05);
        }
        .header-nav__link--active {
            color: var(--color-accent-strong) !important;
            background: rgba(0, 229, 255, 0.08);
        }
        .header-nav__link i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }
        .header-nav__item--mega:hover .header-nav__link i {
            transform: rotate(180deg);
        }
        /* Mega Panel */
        .mega-panel {
            position: absolute;
            top: calc(100% + 12px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 28px 24px;
            display: flex;
            gap: 32px;
            min-width: 560px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: all var(--transition-normal);
            border: 1px solid var(--color-border-light);
            z-index: 1010;
        }
        .header-nav__item--mega:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }
        .mega-panel__col {
            flex: 1;
            min-width: 160px;
        }
        .mega-panel__title {
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--color-text-muted);
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--color-border-light);
        }
        .mega-panel__links li {
            margin-bottom: 6px;
        }
        .mega-panel__links a {
            display: block;
            padding: 7px 10px;
            border-radius: 6px;
            font-size: 0.9rem;
            color: var(--color-text-light);
            transition: all var(--transition-fast);
        }
        .mega-panel__links a:hover {
            color: var(--color-accent-strong);
            background: rgba(0, 229, 255, 0.06);
        }
        .mega-panel__card {
            display: block;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            text-align: center;
        }
        .mega-panel__card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
        }
        .mega-panel__card img {
            width: 100%;
            height: 100px;
            object-fit: cover;
        }
        .mega-panel__card span {
            display: block;
            padding: 10px 12px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent-strong);
        }
        /* 移动端汉堡菜单 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-text);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-toggle:hover {
            background: var(--color-bg-alt);
        }

        /* ==================== Hero ==================== */
        .hero-solutions {
            position: relative;
            padding: var(--spacing-3xl) 0;
            background: var(--color-dark-panel);
            color: var(--color-white);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero-solutions__bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .hero-solutions__overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 229, 255, 0.12) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 40%, rgba(124, 77, 255, 0.1) 0%, transparent 55%),
                        linear-gradient(180deg, rgba(13, 17, 23, 0.4) 0%, var(--color-dark-panel) 100%);
            z-index: 1;
        }
        .hero-solutions__content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-solutions__badge {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--color-accent);
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.3);
            margin-bottom: var(--spacing-md);
        }
        .hero-solutions h1 {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: var(--spacing-md);
            color: #ffffff;
        }
        .hero-solutions h1 .highlight {
            background: linear-gradient(135deg, var(--color-accent), #40f0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-solutions__desc {
            font-size: 1.15rem;
            line-height: 1.8;
            color: #bcc5d0;
            max-width: 620px;
            margin-bottom: var(--spacing-lg);
        }
        .hero-solutions__actions {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            white-space: nowrap;
            letter-spacing: 0.2px;
            cursor: pointer;
            border: none;
            text-decoration: none;
        }
        .btn--primary {
            background: linear-gradient(135deg, var(--color-accent-strong), var(--color-accent));
            color: #0d1117;
            box-shadow: 0 6px 24px rgba(0, 229, 255, 0.4);
        }
        .btn--primary:hover {
            box-shadow: 0 10px 36px rgba(0, 229, 255, 0.55);
            transform: translateY(-2px);
            color: #0d1117;
        }
        .btn--outline {
            background: transparent;
            color: var(--color-white);
            border: 2px solid rgba(255, 255, 255, 0.35);
        }
        .btn--outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(0, 229, 255, 0.06);
            transform: translateY(-2px);
        }
        .btn--white {
            background: var(--color-white);
            color: var(--color-primary);
            font-weight: 700;
            box-shadow: var(--shadow-md);
        }
        .btn--white:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            color: var(--color-accent-strong);
        }
        .btn--accent-outline {
            background: transparent;
            color: var(--color-accent-strong);
            border: 2px solid var(--color-accent-strong);
            font-weight: 700;
        }
        .btn--accent-outline:hover {
            background: var(--color-accent-strong);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }

        /* ==================== 解决方案卡片网格 ==================== */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .solution-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .solution-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-purple));
            opacity: 0;
            transition: opacity var(--transition-normal);
        }
        .solution-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .solution-card:hover::before {
            opacity: 1;
        }
        .solution-card__icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: var(--spacing-md);
            flex-shrink: 0;
        }
        .solution-card__icon--cyan {
            background: rgba(0, 229, 255, 0.1);
            color: var(--color-accent-strong);
        }
        .solution-card__icon--purple {
            background: rgba(124, 77, 255, 0.1);
            color: var(--color-purple);
        }
        .solution-card__icon--green {
            background: rgba(0, 200, 120, 0.1);
            color: #00c878;
        }
        .solution-card__icon--orange {
            background: rgba(255, 140, 0, 0.1);
            color: #ff8c00;
        }
        .solution-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: var(--spacing-xs);
            color: var(--color-text);
        }
        .solution-card p {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.65;
            margin-bottom: var(--spacing-md);
            flex-grow: 1;
        }
        .solution-card__tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 16px;
            background: var(--color-bg-alt);
            color: var(--color-text-light);
            transition: all var(--transition-fast);
        }
        .tag--accent {
            background: rgba(0, 229, 255, 0.08);
            color: var(--color-accent-strong);
        }

        /* ==================== 流程模块 ==================== */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .process-flow::before {
            content: '';
            position: absolute;
            top: 56px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-purple), var(--color-accent));
            opacity: 0.4;
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 20px 14px;
        }
        .process-step__num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--color-white);
            border: 3px solid var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--color-accent-strong);
            margin: 0 auto var(--spacing-md);
            box-shadow: 0 0 0 8px rgba(0, 229, 255, 0.06);
            transition: all var(--transition-normal);
        }
        .process-step:hover .process-step__num {
            box-shadow: 0 0 0 16px rgba(0, 229, 255, 0.14), var(--shadow-glow);
            transform: scale(1.08);
            border-color: var(--color-purple);
            color: var(--color-purple);
        }
        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.55;
        }
        .section--dark .process-step__num {
            background: var(--color-dark-panel-alt);
            border-color: var(--color-accent);
            color: var(--color-accent);
        }
        .section--dark .process-step h4 {
            color: var(--color-white);
        }
        .section--dark .process-step p {
            color: #a0a8b8;
        }
        .section--dark .process-flow::before {
            opacity: 0.3;
        }

        /* ==================== 统计数据 ==================== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 28px 16px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition-normal);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .stat-card__number {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--color-accent), #40f0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            margin-bottom: 8px;
        }
        .stat-card__label {
            font-size: 0.9rem;
            font-weight: 600;
            color: #bcc5d0;
            letter-spacing: 0.3px;
        }

        /* ==================== 行业场景 ==================== */
        .industry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .industry-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
        }
        .industry-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .industry-card__img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .industry-card__body {
            padding: 22px 20px;
        }
        .industry-card__body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .industry-card__body p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* ==================== FAQ ==================== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-border-light);
            padding: 20px 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--color-border-light);
        }
        .faq-item__q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-text);
            gap: 16px;
            user-select: none;
        }
        .faq-item__q i {
            font-size: 0.85rem;
            color: var(--color-accent-strong);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.open .faq-item__q i {
            transform: rotate(180deg);
        }
        .faq-item__a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding-top 0.3s ease;
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }
        .faq-item.open .faq-item__a {
            max-height: 300px;
            padding-top: 10px;
        }
        .section--dark .faq-item {
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section--dark .faq-item__q {
            color: var(--color-white);
        }
        .section--dark .faq-item__a {
            color: #a0a8b8;
        }

        /* ==================== CTA ==================== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-dark-panel) 0%, #1a1040 50%, var(--color-dark-panel) 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
            padding: var(--spacing-3xl) 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -30%;
            width: 160%;
            height: 220%;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.08) 0%, transparent 60%);
            z-index: 0;
            animation: ctaPulse 8s ease-in-out infinite;
        }
        @keyframes ctaPulse {
            0%, 100% { opacity: 0.6; transform: scale(1); }
            50% { opacity: 1; transform: scale(1.05); }
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: #bcc5d0;
            max-width: 600px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.7;
        }

        /* ==================== Footer ==================== */
        .site-footer {
            background: var(--color-dark-panel);
            color: #bcc5d0;
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: var(--spacing-xl);
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            margin-bottom: var(--spacing-lg);
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.3px;
        }
        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #8892a0;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: #8892a0;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: #6b7280;
        }

        /* ==================== 响应式 ==================== */
        @media (max-width: 1024px) {
            .solutions-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .process-flow {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .process-flow::before {
                display: none;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .industry-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .hero-solutions h1 {
                font-size: 2.4rem;
            }
            .section__title {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-white);
                flex-direction: column;
                padding: 16px;
                box-shadow: var(--shadow-lg);
                border-bottom: 2px solid var(--color-border);
                display: none;
                gap: 4px;
                z-index: 999;
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav__link {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .mega-panel {
                position: static;
                transform: none;
                min-width: auto;
                box-shadow: none;
                border: none;
                padding: 12px 16px;
                flex-direction: column;
                gap: 16px;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                display: none;
                background: var(--color-bg-alt);
                border-radius: var(--radius-md);
                margin-top: 8px;
            }
            .header-nav__item--mega.open-mobile .mega-panel {
                display: flex;
            }
            .mega-panel__card img {
                height: 80px;
            }
            .mobile-toggle {
                display: block;
            }
            .solutions-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process-flow {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .industry-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .hero-solutions h1 {
                font-size: 2rem;
            }
            .hero-solutions__desc {
                font-size: 1rem;
            }
            .hero-solutions {
                min-height: 420px;
                padding: var(--spacing-2xl) 0;
            }
            .section__title {
                font-size: 1.7rem;
            }
            .section {
                padding: var(--spacing-2xl) 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .hero-solutions__actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-solutions__actions .btn {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .process-flow {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .stats-row {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .hero-solutions h1 {
                font-size: 1.7rem;
            }
            .section__title {
                font-size: 1.45rem;
            }
            .solution-card {
                padding: 22px 18px;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.9rem;
            }
            .stat-card__number {
                font-size: 2.2rem;
            }
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
        }