/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --primary: #0C1E3A;
        --primary-light: #162d55;
        --accent: #00B8D4;
        --accent-dark: #0098b0;
        --purple: #7C5CBF;
        --purple-light: #9b7ed4;
        --bg-deep: #070C16;
        --bg-surface: #0F1D30;
        --bg-card: rgba(255, 255, 255, 0.04);
        --text-white: #FFFFFF;
        --text-body: #D0D8E8;
        --text-muted: #8896A8;
        --text-disabled: #4A5568;
        --border-subtle: rgba(255, 255, 255, 0.06);
        --border-card: rgba(255, 255, 255, 0.07);
        --radius-md: 10px;
        --radius-lg: 16px;
        --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
        --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
        --font-en: 'Inter', -apple-system, sans-serif;
        --max-width: 1280px;
        --nav-height: 80px;
        --topbar-height: 40px;
        --transition: 0.3s ease;
    }

    /* ===== Reset & Base ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--font-cn);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-body);
        background-color: var(--bg-deep);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
    }

    a {
        color: var(--accent);
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover {
        color: var(--purple);
    }
    a:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }

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

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

    /* ===== Container ===== */
    .container {
        max-width: var(--max-width);
        padding-left: 20px;
        padding-right: 20px;
        margin-left: auto;
        margin-right: auto;
    }

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

    /* ===== Section Spacing ===== */
    .section-padding {
        padding-top: 100px;
        padding-bottom: 100px;
    }

    @media (max-width: 992px) {
        .section-padding {
            padding-top: 60px;
            padding-bottom: 60px;
        }
    }

    .section-divider {
        height: 1px;
        background: var(--border-subtle);
        margin: 0;
    }

    /* ===== Section Title ===== */
    .section-title {
        font-size: 38px;
        font-weight: 600;
        line-height: 1.3;
        color: var(--text-white);
        margin-bottom: 8px;
        letter-spacing: -0.3px;
    }

    .section-subtitle {
        font-size: 18px;
        font-weight: 400;
        color: var(--text-muted);
        margin-bottom: 0;
    }

    .title-underline {
        width: 60px;
        height: 3px;
        background: linear-gradient(135deg, var(--accent), var(--purple));
        border-radius: 2px;
        margin-bottom: 24px;
        margin-top: 12px;
    }

    /* ===== Top Bar ===== */
    .top-bar {
        height: var(--topbar-height);
        background: rgba(255, 255, 255, 0.02);
        border-bottom: 1px solid var(--border-subtle);
        display: flex;
        align-items: center;
        font-size: 13px;
        color: var(--text-muted);
    }

    .top-bar .top-bar-left {
        font-size: 13px;
        font-weight: 400;
        color: var(--text-muted);
        letter-spacing: 0.3px;
    }

    .top-bar .top-bar-right a {
        color: var(--text-muted);
        font-size: 13px;
        margin-left: 28px;
        transition: color var(--transition);
    }
    .top-bar .top-bar-right a:hover {
        color: var(--text-body);
    }

    @media (max-width: 768px) {
        .top-bar .top-bar-right a {
            margin-left: 16px;
            font-size: 12px;
        }
        .top-bar .top-bar-right a:nth-child(2),
        .top-bar .top-bar-right a:nth-child(3) {
            display: none;
        }
    }

    /* ===== Main Navigation ===== */
    .main-nav {
        height: var(--nav-height);
        background: rgba(7, 12, 22, 0.92);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        border-bottom: 1px solid var(--border-subtle);
        position: sticky;
        top: 0;
        z-index: 1050;
        transition: background var(--transition);
    }

    .main-nav .nav-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 24px;
        font-weight: 700;
        color: var(--text-white);
        letter-spacing: -0.5px;
    }
    .main-nav .nav-brand:hover {
        color: var(--text-white);
    }

    .nav-brand-icon {
        width: 28px;
        height: 28px;
        flex-shrink: 0;
    }
    .nav-brand-icon svg {
        width: 100%;
        height: 100%;
        fill: none;
        stroke: var(--accent);
        stroke-width: 2;
        stroke-linecap: round;
        stroke-linejoin: round;
    }

    .main-nav .nav-item {
        font-size: 16px;
        font-weight: 500;
        color: var(--text-body);
        padding: 0 16px;
        height: var(--nav-height);
        line-height: var(--nav-height);
        position: relative;
        transition: color var(--transition);
        white-space: nowrap;
    }
    .main-nav .nav-item:hover {
        color: var(--accent);
    }
    .main-nav .nav-item.active {
        color: var(--accent);
    }
    .main-nav .nav-item.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 24px;
        height: 2px;
        background: var(--accent);
        border-radius: 1px;
    }

    .main-nav .nav-cta {
        padding: 12px 28px;
        border-radius: var(--radius-md);
        font-size: 15px;
        font-weight: 600;
        color: var(--text-white);
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border: none;
        box-shadow: 0 0 12px rgba(0, 184, 212, 0.4);
        transition: all var(--transition);
        cursor: pointer;
        white-space: nowrap;
    }
    .main-nav .nav-cta:hover {
        box-shadow: 0 0 20px rgba(0, 184, 212, 0.6), 0 0 40px rgba(124, 92, 191, 0.2);
        color: var(--text-white);
        transform: translateY(-1px);
    }
    .main-nav .nav-cta:active {
        transform: translateY(0);
        box-shadow: 0 0 8px rgba(0, 184, 212, 0.3);
    }

    /* Mobile nav toggle */
    .navbar-toggler {
        border: none;
        background: transparent;
        padding: 8px;
        color: var(--text-body);
        font-size: 24px;
        cursor: pointer;
    }
    .navbar-toggler:focus {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }

    .navbar-collapse {
        background: rgba(7, 12, 22, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        padding: 20px 0;
    }
    .navbar-collapse .nav-item {
        height: auto;
        line-height: 1.5;
        padding: 12px 20px;
        border-bottom: 1px solid var(--border-subtle);
    }
    .navbar-collapse .nav-item.active::after {
        display: none;
    }
    .navbar-collapse .nav-cta {
        margin: 16px 20px 8px;
        text-align: center;
        display: block;
    }

    @media (max-width: 992px) {
        .main-nav .nav-brand {
            font-size: 20px;
        }
    }

    /* ===== Hero ===== */
    .hero {
        min-height: 100vh;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        position: relative;
        display: flex;
        align-items: center;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(7, 12, 22, 0.82) 0%, rgba(7, 12, 22, 0.55) 50%, rgba(0, 184, 212, 0.12) 80%, rgba(7, 12, 22, 0.3) 100%);
        z-index: 1;
    }
    .hero .hero-glow {
        position: absolute;
        top: -20%;
        right: -10%;
        width: 60%;
        height: 80%;
        background: radial-gradient(ellipse at center, rgba(0, 184, 212, 0.08), transparent 70%);
        z-index: 1;
        pointer-events: none;
    }
    .hero .hero-content {
        position: relative;
        z-index: 2;
        width: 100%;
    }
    .hero .hero-text-col {
        max-width: 55%;
        flex: 0 0 55%;
    }
    .hero .hero-deco-col {
        flex: 0 0 45%;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .hero-deco-shape {
        width: 340px;
        height: 340px;
        border-radius: 50%;
        background: radial-gradient(circle at 30% 30%, rgba(0, 184, 212, 0.15), rgba(124, 92, 191, 0.08) 60%, transparent 80%);
        position: relative;
        animation: float 6s ease-in-out infinite;
    }
    .hero-deco-shape::after {
        content: '';
        position: absolute;
        inset: 20px;
        border-radius: 50%;
        border: 1.5px solid rgba(0, 184, 212, 0.2);
        background: radial-gradient(circle at 60% 40%, rgba(124, 92, 191, 0.06), transparent 70%);
    }
    .hero-deco-shape .deco-ring {
        position: absolute;
        border-radius: 50%;
        border: 1px solid rgba(0, 184, 212, 0.1);
        background: transparent;
    }
    .hero-deco-shape .deco-ring:nth-child(1) {
        inset: 40px;
        animation: spin 20s linear infinite;
    }
    .hero-deco-shape .deco-ring:nth-child(2) {
        inset: 80px;
        animation: spin 15s linear infinite reverse;
    }

    @keyframes float {
        0%,
        100% {
            transform: translateY(0);
        }
        50% {
            transform: translateY(-20px);
        }
    }
    @keyframes spin {
        0% {
            transform: rotate(0deg);
        }
        100% {
            transform: rotate(360deg);
        }
    }

    .hero h1 {
        font-size: 56px;
        font-weight: 700;
        line-height: 1.2;
        color: var(--text-white);
        letter-spacing: -0.5px;
        margin-bottom: 16px;
    }
    .hero .hero-sub {
        font-size: 24px;
        font-weight: 400;
        color: var(--text-body);
        margin-bottom: 32px;
        line-height: 1.4;
    }
    .hero .hero-actions {
        display: flex;
        gap: 20px;
        flex-wrap: wrap;
        align-items: center;
    }
    .hero .btn-primary-custom {
        padding: 14px 36px;
        border-radius: var(--radius-md);
        font-size: 16px;
        font-weight: 600;
        color: var(--text-white);
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border: none;
        box-shadow: 0 0 12px rgba(0, 184, 212, 0.4);
        transition: all var(--transition);
        cursor: pointer;
    }
    .hero .btn-primary-custom:hover {
        box-shadow: 0 0 20px rgba(0, 184, 212, 0.6), 0 0 40px rgba(124, 92, 191, 0.2);
        color: var(--text-white);
        transform: translateY(-2px);
    }
    .hero .btn-primary-custom:active {
        transform: translateY(0);
        box-shadow: 0 0 8px rgba(0, 184, 212, 0.3);
    }
    .hero .btn-outline-custom {
        padding: 14px 32px;
        border-radius: var(--radius-md);
        font-size: 16px;
        font-weight: 500;
        color: var(--text-body);
        background: transparent;
        border: 1.5px solid rgba(255, 255, 255, 0.2);
        transition: all var(--transition);
        cursor: pointer;
    }
    .hero .btn-outline-custom:hover {
        background: rgba(0, 184, 212, 0.12);
        border-color: var(--accent);
        color: var(--accent);
    }
    .hero .btn-outline-custom:active {
        background: rgba(0, 184, 212, 0.2);
    }

    .hero .hero-stats {
        margin-top: 48px;
        display: flex;
        gap: 20px;
        flex-wrap: wrap;
    }
    .hero .stat-card {
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border-card);
        border-radius: var(--radius-lg);
        padding: 20px 28px;
        text-align: center;
        min-width: 140px;
        flex: 1;
    }
    .hero .stat-card .stat-number {
        font-size: 32px;
        font-weight: 700;
        color: var(--accent);
        line-height: 1.2;
    }
    .hero .stat-card .stat-label {
        font-size: 14px;
        color: var(--text-muted);
        margin-top: 4px;
    }

    @media (max-width: 992px) {
        .hero .hero-text-col {
            max-width: 100%;
            flex: 0 0 100%;
        }
        .hero .hero-deco-col {
            display: none;
        }
        .hero h1 {
            font-size: 42px;
        }
        .hero .hero-sub {
            font-size: 20px;
        }
        .hero .hero-stats {
            gap: 12px;
        }
        .hero .stat-card {
            padding: 16px 20px;
            min-width: 100px;
        }
        .hero .stat-card .stat-number {
            font-size: 26px;
        }
    }

    @media (max-width: 576px) {
        .hero h1 {
            font-size: 32px;
        }
        .hero .hero-sub {
            font-size: 17px;
        }
        .hero .hero-actions {
            flex-direction: column;
            gap: 12px;
        }
        .hero .btn-primary-custom,
        .hero .btn-outline-custom {
            width: 100%;
            text-align: center;
        }
        .hero .hero-stats {
            flex-direction: column;
        }
        .hero .stat-card {
            min-width: 100%;
        }
    }

    /* ===== Services / Core Capabilities ===== */
    .services-section {
        background: var(--bg-deep);
    }
    .service-card {
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border-card);
        border-radius: var(--radius-lg);
        padding: 36px;
        transition: all var(--transition);
        height: 100%;
    }
    .service-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 0 24px rgba(0, 184, 212, 0.08), 0 8px 32px rgba(0, 0, 0, 0.4);
        border-color: rgba(255, 255, 255, 0.12);
    }
    .service-card .service-icon {
        width: 48px;
        height: 48px;
        color: var(--purple);
        margin-bottom: 20px;
        font-size: 36px;
        line-height: 1;
    }
    .service-card .service-icon svg {
        width: 48px;
        height: 48px;
        fill: none;
        stroke: var(--purple);
        stroke-width: 1.5;
        stroke-linecap: round;
        stroke-linejoin: round;
    }
    .service-card h3 {
        font-size: 26px;
        font-weight: 600;
        color: var(--text-white);
        margin-bottom: 12px;
    }
    .service-card p {
        font-size: 15px;
        color: var(--text-body);
        line-height: 1.7;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 20px;
    }
    .service-card .service-link {
        font-size: 14px;
        color: var(--accent);
        font-weight: 500;
        transition: color var(--transition);
    }
    .service-card .service-link:hover {
        color: var(--purple);
    }

    @media (max-width: 992px) {
        .service-card {
            padding: 24px;
        }
        .service-card h3 {
            font-size: 22px;
        }
    }

    /* ===== Stats / Data Section ===== */
    .stats-section {
        background: var(--bg-surface);
        position: relative;
        overflow: hidden;
    }
    .stats-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
        background-size: 24px 24px;
        pointer-events: none;
    }
    .stat-item {
        text-align: center;
        padding: 20px 0;
        position: relative;
    }
    .stat-item .stat-icon {
        font-size: 12px;
        color: var(--accent);
        margin-bottom: 8px;
        opacity: 0.6;
    }
    .stat-item .stat-number {
        font-size: 56px;
        font-weight: 700;
        color: var(--accent);
        line-height: 1.2;
    }
    .stat-item .stat-label {
        font-size: 16px;
        font-weight: 400;
        color: var(--text-body);
        margin-top: 4px;
    }
    .stat-divider {
        width: 1px;
        height: 60px;
        background: var(--border-subtle);
        align-self: center;
    }

    @media (max-width: 768px) {
        .stat-item .stat-number {
            font-size: 38px;
        }
        .stat-divider {
            display: none;
        }
        .stat-item {
            padding: 16px 0;
        }
    }

    /* ===== Cases Section ===== */
    .cases-section {
        background: var(--bg-deep);
    }
    .case-card {
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border-card);
        border-radius: var(--radius-lg);
        overflow: hidden;
        transition: all var(--transition);
        height: 100%;
    }
    .case-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 0 24px rgba(0, 184, 212, 0.08), 0 8px 32px rgba(0, 0, 0, 0.4);
        border-color: rgba(255, 255, 255, 0.12);
    }
    .case-card .case-img {
        width: 100%;
        aspect-ratio: 16 / 9;
        object-fit: cover;
        background: var(--primary-light);
    }
    .case-card .case-img-sm {
        aspect-ratio: 4 / 3;
    }
    .case-card .case-body {
        padding: 24px;
    }
    .case-card .case-tag {
        display: inline-block;
        background: rgba(124, 92, 191, 0.2);
        color: var(--purple-light);
        padding: 4px 12px;
        border-radius: 4px;
        font-size: 13px;
        font-weight: 500;
        margin-bottom: 8px;
    }
    .case-card h3 {
        font-size: 22px;
        font-weight: 600;
        color: var(--text-white);
        margin-bottom: 8px;
    }
    .case-card h4 {
        font-size: 18px;
        font-weight: 600;
        color: var(--text-white);
        margin-bottom: 6px;
    }
    .case-card p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 12px;
    }
    .case-card .case-link {
        font-size: 14px;
        color: var(--accent);
        font-weight: 500;
    }
    .case-card .case-link:hover {
        color: var(--purple);
    }

    .case-featured .case-img {
        aspect-ratio: 16 / 9;
    }

    @media (max-width: 992px) {
        .case-card .case-body {
            padding: 18px;
        }
        .case-card h3 {
            font-size: 20px;
        }
    }

    /* ===== Solutions Section ===== */
    .solutions-section {
        background: var(--bg-surface);
    }
    .solution-card {
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border-card);
        border-radius: var(--radius-lg);
        padding: 32px;
        transition: all var(--transition);
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    .solution-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 0 20px rgba(0, 184, 212, 0.06);
    }
    .solution-card.glow-accent {
        border-color: rgba(0, 184, 212, 0.15);
    }
    .solution-card.glow-accent:hover {
        border-color: rgba(0, 184, 212, 0.3);
        box-shadow: 0 0 24px rgba(0, 184, 212, 0.1);
    }
    .solution-card.glow-purple {
        border-color: rgba(124, 92, 191, 0.15);
    }
    .solution-card.glow-purple:hover {
        border-color: rgba(124, 92, 191, 0.3);
        box-shadow: 0 0 24px rgba(124, 92, 191, 0.1);
    }
    .solution-card .solution-icon {
        width: 48px;
        height: 48px;
        flex-shrink: 0;
        color: var(--purple);
        font-size: 36px;
        line-height: 1;
        margin-bottom: 16px;
    }
    .solution-card h3 {
        font-size: 22px;
        font-weight: 600;
        color: var(--text-white);
        margin-bottom: 8px;
    }
    .solution-card .solution-desc {
        font-size: 15px;
        color: var(--text-body);
        line-height: 1.6;
        margin-bottom: 16px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .solution-card .solution-features {
        list-style: none;
        padding: 0;
        margin: 0 0 20px;
    }
    .solution-card .solution-features li {
        font-size: 14px;
        color: var(--text-body);
        padding: 4px 0;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .solution-card .solution-features li::before {
        content: '✓';
        color: var(--accent);
        font-weight: 700;
        font-size: 14px;
    }
    .solution-card .solution-btn {
        margin-top: auto;
        padding: 10px 24px;
        border-radius: var(--radius-md);
        font-size: 14px;
        font-weight: 500;
        color: var(--text-body);
        background: transparent;
        border: 1.5px solid rgba(255, 255, 255, 0.15);
        transition: all var(--transition);
        cursor: pointer;
        align-self: flex-start;
    }
    .solution-card .solution-btn:hover {
        background: rgba(0, 184, 212, 0.1);
        border-color: var(--accent);
        color: var(--accent);
    }

    @media (max-width: 992px) {
        .solution-card {
            padding: 24px;
        }
        .solution-card h3 {
            font-size: 20px;
        }
    }

    /* ===== Latest News / CMS Section ===== */
    .news-section {
        background: var(--bg-deep);
    }
    .news-card {
        background: var(--bg-card);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--border-card);
        border-radius: var(--radius-lg);
        overflow: hidden;
        transition: all var(--transition);
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    .news-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 0 20px rgba(0, 184, 212, 0.06);
        border-color: rgba(255, 255, 255, 0.12);
    }
    .news-card .news-image {
        width: 100%;
        aspect-ratio: 16 / 9;
        background: var(--primary-light);
        overflow: hidden;
        position: relative;
    }
    .news-card .news-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }
    .news-card:hover .news-image img {
        transform: scale(1.03);
    }
    .news-card .news-image .tag {
        position: absolute;
        top: 12px;
        left: 12px;
        background: rgba(0, 184, 212, 0.85);
        color: var(--text-white);
        font-size: 13px;
        font-weight: 500;
        padding: 4px 12px;
        border-radius: 4px;
        z-index: 2;
    }
    .news-card .news-content {
        padding: 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .news-card .news-title {
        font-size: 20px;
        font-weight: 600;
        color: var(--text-white);
        line-height: 1.4;
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card .news-excerpt {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 12px;
        flex: 1;
    }
    .news-card .news-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 14px;
        color: var(--text-muted);
    }
    .news-card .news-meta .read-more {
        color: var(--accent);
        font-weight: 500;
        font-size: 14px;
        transition: color var(--transition);
    }
    .news-card .news-meta .read-more:hover {
        color: var(--purple);
    }

    .empty-state {
        padding: 60px 20px;
        text-align: center;
        color: var(--text-muted);
        font-size: 18px;
        background: var(--bg-card);
        border-radius: var(--radius-lg);
        border: 1px dashed var(--border-subtle);
        width: 100%;
    }
    .empty-state i {
        font-size: 48px;
        color: var(--text-disabled);
        margin-bottom: 16px;
        display: block;
    }

    @media (max-width: 768px) {
        .news-card .news-title {
            font-size: 18px;
        }
        .news-card .news-content {
            padding: 16px;
        }
    }

    /* ===== FAQ Section ===== */
    .faq-section {
        background: var(--bg-surface);
    }
    .faq-item {
        border-bottom: 1px solid var(--border-subtle);
    }
    .faq-item:last-child {
        border-bottom: none;
    }
    .faq-question {
        padding: 20px 24px;
        background: rgba(255, 255, 255, 0.02);
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        transition: background var(--transition);
        user-select: none;
    }
    .faq-question:hover {
        background: rgba(255, 255, 255, 0.04);
    }
    .faq-question .q-text {
        font-size: 18px;
        font-weight: 500;
        color: var(--text-body);
        transition: color var(--transition);
    }
    .faq-question .q-icon {
        font-size: 20px;
        color: var(--text-muted);
        transition: transform 0.3s ease, color 0.3s ease;
        flex-shrink: 0;
        margin-left: 16px;
    }
    .faq-question.active .q-text {
        color: var(--accent);
    }
    .faq-question.active .q-icon {
        transform: rotate(45deg);
        color: var(--accent);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 24px;
    }
    .faq-answer.open {
        max-height: 300px;
        padding: 0 24px 24px;
    }
    .faq-answer .a-text {
        font-size: 15px;
        line-height: 1.6;
        color: var(--text-muted);
    }

    @media (max-width: 768px) {
        .faq-question {
            padding: 16px 18px;
        }
        .faq-question .q-text {
            font-size: 16px;
        }
        .faq-answer.open {
            padding: 0 18px 18px;
        }
    }

    /* ===== CTA Section ===== */
    .cta-section {
        background: var(--bg-deep);
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        top: -30%;
        left: 50%;
        transform: translateX(-50%);
        width: 80%;
        height: 80%;
        background: radial-gradient(ellipse at center, rgba(0, 184, 212, 0.04), transparent 70%);
        pointer-events: none;
    }
    .cta-section h2 {
        font-size: 38px;
        font-weight: 600;
        color: var(--text-white);
        margin-bottom: 12px;
    }
    .cta-section .cta-sub {
        font-size: 18px;
        color: var(--text-muted);
        margin-bottom: 36px;
    }
    .cta-section .btn-cta {
        padding: 18px 48px;
        border-radius: 12px;
        font-size: 18px;
        font-weight: 600;
        color: var(--text-white);
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border: none;
        box-shadow: 0 0 20px rgba(0, 184, 212, 0.4);
        transition: all var(--transition);
        cursor: pointer;
    }
    .cta-section .btn-cta:hover {
        box-shadow: 0 0 32px rgba(0, 184, 212, 0.6), 0 0 60px rgba(124, 92, 191, 0.2);
        color: var(--text-white);
        transform: translateY(-2px);
    }
    .cta-section .btn-cta:active {
        transform: translateY(0);
        box-shadow: 0 0 12px rgba(0, 184, 212, 0.3);
    }
    .cta-section .trust-badges {
        display: flex;
        justify-content: center;
        gap: 32px;
        margin-top: 36px;
        flex-wrap: wrap;
    }
    .cta-section .trust-badge {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    .cta-section .trust-badge .badge-icon {
        width: 64px;
        height: 64px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid var(--border-subtle);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 28px;
        color: var(--accent);
    }
    .cta-section .trust-badge .badge-label {
        font-size: 13px;
        color: var(--text-muted);
    }

    @media (max-width: 576px) {
        .cta-section h2 {
            font-size: 28px;
        }
        .cta-section .cta-sub {
            font-size: 16px;
        }
        .cta-section .btn-cta {
            padding: 16px 36px;
            font-size: 16px;
            width: 100%;
        }
        .cta-section .trust-badges {
            gap: 20px;
        }
        .cta-section .trust-badge .badge-icon {
            width: 52px;
            height: 52px;
            font-size: 22px;
        }
    }

    /* ===== Footer ===== */
    .site-footer {
        background: #050A12;
        padding-top: 60px;
    }
    .site-footer h5 {
        font-size: 18px;
        font-weight: 600;
        color: var(--text-white);
        margin-bottom: 16px;
    }
    .site-footer .footer-brand {
        font-size: 24px;
        font-weight: 700;
        color: var(--text-white);
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 12px;
    }
    .site-footer .footer-desc {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .site-footer .social-icons {
        display: flex;
        gap: 12px;
    }
    .site-footer .social-icons a {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid var(--border-subtle);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        font-size: 16px;
        transition: all var(--transition);
    }
    .site-footer .social-icons a:hover {
        background: rgba(0, 184, 212, 0.12);
        border-color: var(--accent);
        color: var(--accent);
    }
    .site-footer .footer-links {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .site-footer .footer-links li {
        margin-bottom: 8px;
    }
    .site-footer .footer-links a {
        font-size: 14px;
        color: var(--text-muted);
        transition: color var(--transition);
    }
    .site-footer .footer-links a:hover {
        color: var(--accent);
    }
    .site-footer .footer-contact {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.8;
    }
    .site-footer .footer-contact i {
        width: 20px;
        color: var(--accent);
        margin-right: 6px;
    }
    .site-footer .footer-bottom {
        background: rgba(255, 255, 255, 0.02);
        padding: 16px 0;
        margin-top: 40px;
        text-align: center;
        font-size: 13px;
        color: #666;
    }

    @media (max-width: 768px) {
        .site-footer {
            padding-top: 40px;
        }
        .site-footer .footer-bottom {
            font-size: 12px;
        }
    }

    /* ===== Utility Classes ===== */
    .text-accent {
        color: var(--accent);
    }
    .text-purple {
        color: var(--purple);
    }
    .text-white {
        color: var(--text-white);
    }
    .text-muted {
        color: var(--text-muted);
    }
    .bg-surface {
        background: var(--bg-surface);
    }
    .bg-deep {
        background: var(--bg-deep);
    }

    /* ===== Responsive Tweaks ===== */
    @media (max-width: 992px) {
        .section-title {
            font-size: 30px;
        }
        .section-subtitle {
            font-size: 16px;
        }
        .hero .hero-text-col {
            max-width: 100%;
            flex: 0 0 100%;
        }
        .hero .hero-deco-col {
            display: none;
        }
    }

    @media (max-width: 576px) {
        .section-title {
            font-size: 26px;
        }
        .section-subtitle {
            font-size: 15px;
        }
        .title-underline {
            width: 48px;
        }
    }

    /* Focus visible for all interactive */
    :focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }

    /* Selection */
    ::selection {
        background: rgba(0, 184, 212, 0.3);
        color: var(--text-white);
    }

    /* ===== Smooth hover for all cards ===== */
    .card-hover {
        transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }
    .card-hover:hover {
        transform: translateY(-4px);
    }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0C1E3A;
            --secondary: #00B8D4;
            --accent: #7C5CBF;
            --bg-dark: #070C16;
            --surface: #0F1D30;
            --text-white: #FFFFFF;
            --text-body: #D0D8E8;
            --text-muted: #8896A8;
            --text-disabled: #4A5568;
            --border-light: rgba(255,255,255,0.06);
            --border-card: rgba(255,255,255,0.07);
            --glass-bg: rgba(255,255,255,0.04);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
            --transition: 0.3s ease;
            --max-width: 1280px;
            --content-width: 800px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Inter', -apple-system, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-white);
            font-weight: 600;
            line-height: 1.3;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Top Bar ===== */
        .top-bar {
            height: 40px;
            background: rgba(255,255,255,0.02);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
        }
        .top-bar .domain-name {
            color: var(--text-muted);
            font-weight: 400;
        }
        .top-bar .top-links a {
            color: var(--text-muted);
            margin-left: 28px;
            transition: color var(--transition);
        }
        .top-bar .top-links a:hover {
            color: var(--text-body);
        }
        @media (max-width: 768px) {
            .top-bar .top-links a {
                margin-left: 16px;
                font-size: 12px;
            }
        }

        /* ===== Navigation ===== */
        .main-nav {
            height: 80px;
            background: rgba(7,12,22,0.92);
            backdrop-filter: blur(30px);
            -webkit-backdrop-filter: blur(30px);
            border-bottom: 1px solid rgba(255,255,255,0.05);
            position: sticky;
            top: 0;
            z-index: 1050;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            font-size: 24px;
            font-weight: 700;
            color: var(--text-white);
            gap: 8px;
            text-decoration: none;
        }
        .nav-brand:hover {
            color: var(--text-white);
        }
        .nav-brand-icon {
            width: 28px;
            height: 28px;
            color: var(--secondary);
            flex-shrink: 0;
        }
        .nav-brand-icon svg {
            width: 100%;
            height: 100%;
        }
        .nav-item {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-body);
            padding: 0 4px;
            margin-left: 32px;
            position: relative;
            text-decoration: none;
            transition: color var(--transition);
        }
        .nav-item:hover {
            color: var(--secondary);
        }
        .nav-item.active {
            color: var(--text-white);
        }
        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: -28px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--secondary);
            border-radius: 1px;
        }
        .nav-cta {
            background: linear-gradient(135deg, #0C1E3A, #00B8D4);
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 0 12px rgba(0,184,212,0.4);
        }
        .nav-cta:hover {
            box-shadow: 0 0 20px rgba(0,184,212,0.6), 0 0 30px rgba(124,92,191,0.2);
            transform: translateY(-1px);
            color: #fff;
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(0,184,212,0.4);
        }
        .navbar-toggler {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.15);
            color: var(--text-body);
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 18px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            border-color: var(--secondary);
        }
        #mobileNav {
            background: rgba(7,12,22,0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid rgba(255,255,255,0.05);
            padding: 16px 0;
        }
        #mobileNav .nav-item {
            display: block;
            margin-left: 0;
            padding: 10px 0;
            font-size: 17px;
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }
        #mobileNav .nav-item.active::after {
            display: none;
        }
        #mobileNav .nav-cta {
            margin-top: 12px;
            width: 100%;
        }
        @media (max-width: 992px) {
            .main-nav {
                height: 70px;
            }
            .nav-brand {
                font-size: 20px;
            }
            .nav-item {
                margin-left: 0;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: 24px 0 0;
        }
        .breadcrumb-custom {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            padding: 0;
            margin: 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-custom li {
            display: flex;
            align-items: center;
        }
        .breadcrumb-custom li + li::before {
            content: '>';
            margin: 0 8px;
            color: var(--text-disabled);
        }
        .breadcrumb-custom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb-custom a:hover {
            color: var(--secondary);
        }
        .breadcrumb-custom .active {
            color: var(--text-body);
        }

        /* ===== Article Header ===== */
        .article-header {
            padding: 40px 0 24px;
        }
        .article-title {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .article-meta {
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-meta .dot-sep {
            color: var(--text-disabled);
        }

        /* ===== Article Content ===== */
        .article-content-wrap {
            padding-bottom: 60px;
        }
        .article-content {
            max-width: var(--content-width);
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
        }
        .article-content h2 {
            font-size: 28px;
            margin-top: 40px;
            margin-bottom: 16px;
            color: var(--text-white);
        }
        .article-content h3 {
            font-size: 22px;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--text-white);
        }
        .article-content h4 {
            font-size: 18px;
            margin-top: 24px;
            margin-bottom: 8px;
            color: var(--text-white);
        }
        .article-content p {
            margin-bottom: 16px;
        }
        .article-content img {
            width: 100%;
            border-radius: 12px;
            margin: 24px 0;
        }
        .article-content blockquote {
            border-left: 3px solid var(--secondary);
            background: rgba(255,255,255,0.03);
            padding: 16px 20px;
            border-radius: 8px;
            margin: 24px 0;
            color: var(--text-muted);
        }
        .article-content ul, .article-content ol {
            margin-bottom: 16px;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content a {
            color: var(--secondary);
        }
        .article-content a:hover {
            color: var(--accent);
        }
        .article-content .back-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--secondary);
            margin-bottom: 24px;
            transition: color var(--transition);
        }
        .article-content .back-link:hover {
            color: var(--accent);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .related-title {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 32px;
        }
        .related-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            text-decoration: none;
            display: block;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(0,0,0,0.5);
            border-color: rgba(255,255,255,0.12);
        }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: var(--surface);
            background-image: url('/assets/images/coverpic/cover-2.webp');
            background-size: cover;
            background-position: center;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-img {
            transform: scale(1.03);
        }
        .related-card .card-body {
            padding: 16px 20px 20px;
        }
        .related-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-date {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            max-width: 500px;
            margin: 0 auto;
        }
        .not-found-box .nf-icon {
            font-size: 56px;
            color: var(--text-disabled);
            margin-bottom: 16px;
        }
        .not-found-box h2 {
            font-size: 24px;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found-box .btn-home {
            display: inline-block;
            padding: 12px 32px;
            background: linear-gradient(135deg, #0C1E3A, #00B8D4);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 0 12px rgba(0,184,212,0.3);
            text-decoration: none;
        }
        .not-found-box .btn-home:hover {
            box-shadow: 0 0 20px rgba(0,184,212,0.5);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--surface);
            position: relative;
        }
        .faq-section .section-title {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-white);
            text-align: center;
            margin-bottom: 8px;
        }
        .faq-section .title-underline {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            border-radius: 2px;
            margin: 12px auto 40px;
        }
        .faq-item {
            background: rgba(255,255,255,0.02);
            border-bottom: 1px solid rgba(255,255,255,0.05);
            border-radius: 8px;
            margin-bottom: 8px;
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 17px;
            font-weight: 500;
            color: var(--text-body);
            transition: color var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--text-white);
        }
        .faq-question .faq-icon {
            font-size: 18px;
            color: var(--secondary);
            transition: transform 0.4s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-item.active .faq-question {
            color: var(--secondary);
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            font-size: 15px;
            line-height: 1.6;
            color: var(--text-muted);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            text-align: center;
            background: var(--bg-dark);
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0,184,212,0.2), transparent);
        }
        .cta-title {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .cta-sub {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 32px;
        }
        .cta-btn {
            display: inline-block;
            padding: 18px 48px;
            background: linear-gradient(135deg, #0C1E3A, #00B8D4);
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 0 20px rgba(0,184,212,0.4);
            text-decoration: none;
            border: none;
            cursor: pointer;
        }
        .cta-btn:hover {
            box-shadow: 0 0 30px rgba(0,184,212,0.6), 0 0 40px rgba(124,92,191,0.2);
            transform: translateY(-2px);
            color: #fff;
        }
        .cta-trust {
            display: flex;
            justify-content: center;
            gap: 32px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .cta-trust .trust-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
        }
        .cta-trust .trust-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--secondary);
            border: 1px solid rgba(255,255,255,0.08);
        }
        .cta-trust .trust-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #050A12;
            padding: 60px 0 0;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .nav-brand-icon {
            width: 28px;
            height: 28px;
            color: var(--secondary);
        }
        .footer-brand .nav-brand-icon svg {
            width: 100%;
            height: 100%;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
            max-width: 280px;
        }
        .social-icons {
            display: flex;
            gap: 16px;
        }
        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 16px;
            transition: all var(--transition);
            border: 1px solid rgba(255,255,255,0.06);
        }
        .social-icons a:hover {
            background: rgba(0,184,212,0.15);
            color: var(--secondary);
            border-color: var(--secondary);
        }
        .site-footer h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            margin-top: 40px;
            padding: 16px 0;
            background: rgba(255,255,255,0.02);
            text-align: center;
            font-size: 13px;
            color: #666;
            border-top: 1px solid rgba(255,255,255,0.03);
        }

        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .article-title {
                font-size: 30px;
            }
            .related-card .card-title {
                font-size: 16px;
            }
            .cta-title {
                font-size: 28px;
            }
            .faq-section .section-title {
                font-size: 28px;
            }
        }
        @media (max-width: 768px) {
            .article-title {
                font-size: 24px;
            }
            .article-meta {
                font-size: 13px;
                gap: 10px;
            }
            .article-content {
                font-size: 15px;
            }
            .related-section {
                padding: 40px 0;
            }
            .related-title {
                font-size: 22px;
            }
            .faq-section {
                padding: 60px 0;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-title {
                font-size: 24px;
            }
            .cta-sub {
                font-size: 16px;
            }
            .cta-btn {
                padding: 14px 36px;
                font-size: 16px;
            }
            .cta-trust {
                gap: 20px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
            .footer-brand {
                font-size: 20px;
            }
        }
        @media (max-width: 576px) {
            .article-title {
                font-size: 20px;
            }
            .breadcrumb-custom {
                font-size: 12px;
            }
            .article-content h2 {
                font-size: 22px;
            }
            .article-content h3 {
                font-size: 18px;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0C1E3A;
            --primary-light: #1A2F4E;
            --secondary: #00B8D4;
            --accent: #7C5CBF;
            --bg-deep: #070C16;
            --bg-surface: #0F1D30;
            --text-white: #FFFFFF;
            --text-main: #D0D8E8;
            --text-muted: #8896A8;
            --text-disabled: #4A5568;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-card: rgba(255, 255, 255, 0.07);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --glow-secondary: rgba(0, 184, 212, 0.4);
            --glow-accent: rgba(124, 92, 191, 0.2);
            --max-width: 1280px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Inter', -apple-system, sans-serif;
            --transition: 0.3s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-family);
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Top Bar ===== */
        .top-bar {
            height: 40px;
            background: rgba(255, 255, 255, 0.02);
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
        }
        .top-bar .top-bar-left {
            font-size: 13px;
            font-weight: 400;
            color: var(--text-muted);
        }
        .top-bar .top-bar-right a {
            font-size: 13px;
            color: var(--text-muted);
            margin-left: 28px;
            transition: color var(--transition);
        }
        .top-bar .top-bar-right a:hover {
            color: var(--text-main);
        }
        @media (max-width: 576px) {
            .top-bar .top-bar-right a {
                margin-left: 16px;
                font-size: 12px;
            }
            .top-bar .top-bar-left {
                font-size: 12px;
            }
        }

        /* ===== Navigation ===== */
        .main-nav {
            height: 80px;
            background: rgba(7, 12, 22, 0.92);
            backdrop-filter: blur(30px);
            -webkit-backdrop-filter: blur(30px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            position: sticky;
            top: 0;
            z-index: 1050;
        }
        .main-nav .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--text-white);
            text-decoration: none;
        }
        .main-nav .nav-brand:hover {
            color: var(--text-white);
        }
        .main-nav .nav-brand-icon {
            width: 28px;
            height: 28px;
            color: var(--secondary);
            flex-shrink: 0;
        }
        .main-nav .nav-brand-icon svg {
            width: 100%;
            height: 100%;
        }
        .main-nav .nav-item {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            padding: 0 4px;
            margin-left: 32px;
            position: relative;
            text-decoration: none;
            transition: color var(--transition);
        }
        .main-nav .nav-item::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            border-radius: 1px;
            transition: width var(--transition);
        }
        .main-nav .nav-item:hover {
            color: var(--secondary);
        }
        .main-nav .nav-item:hover::after {
            width: 100%;
        }
        .main-nav .nav-item.active {
            color: var(--secondary);
        }
        .main-nav .nav-item.active::after {
            width: 100%;
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border: none;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-white);
            box-shadow: 0 0 12px var(--glow-secondary);
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }
        .nav-cta:hover {
            box-shadow: 0 0 20px rgba(0, 184, 212, 0.6), 0 0 30px var(--glow-accent);
            transform: translateY(-1px);
            color: var(--text-white);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 0 8px var(--glow-secondary);
        }
        .navbar-toggler {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: var(--text-main);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            font-size: 20px;
            cursor: pointer;
            transition: border-color var(--transition);
        }
        .navbar-toggler:hover {
            border-color: var(--secondary);
        }
        #mobileNav .container {
            padding-top: 16px;
            padding-bottom: 16px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            background: rgba(7, 12, 22, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
        }
        #mobileNav .nav-item {
            margin-left: 0;
            padding: 10px 0;
            font-size: 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        #mobileNav .nav-cta {
            width: 100%;
            text-align: center;
            margin-top: 8px;
        }
        @media (max-width: 991px) {
            .main-nav {
                height: auto;
                min-height: 70px;
            }
            .main-nav .nav-brand {
                font-size: 20px;
            }
        }

        /* ===== Section ===== */
        .section {
            padding: 100px 0;
        }
        .section-divider {
            height: 1px;
            background: rgba(255, 255, 255, 0.04);
            margin: 0;
        }
        .section-heading {
            text-align: center;
            margin-bottom: 60px;
        }
        .section-heading h2 {
            font-size: 38px;
            font-weight: 600;
            color: var(--text-white);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-heading .heading-line {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            border-radius: 2px;
            margin: 0 auto 24px;
        }
        .section-heading .subtitle {
            font-size: 18px;
            font-weight: 400;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
        }
        .section-heading.left-align {
            text-align: left;
        }
        .section-heading.left-align .heading-line {
            margin: 0 0 24px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .section-heading h2 {
                font-size: 28px;
            }
            .section-heading .subtitle {
                font-size: 16px;
            }
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .glass-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 255, 255, 0.12);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 24px rgba(0, 184, 212, 0.08);
        }
        .glass-card .card-icon {
            width: 48px;
            height: 48px;
            color: var(--accent);
            margin-bottom: 20px;
            font-size: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .glass-card h3 {
            font-size: 26px;
            font-weight: 600;
            color: var(--text-white);
            line-height: 1.4;
            margin-bottom: 12px;
        }
        .glass-card p {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .glass-card .card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .glass-card .card-link:hover {
            color: var(--accent);
        }
        .glass-card .card-link i {
            margin-left: 4px;
            font-size: 12px;
        }
        @media (max-width: 768px) {
            .glass-card {
                padding: 24px;
            }
            .glass-card h3 {
                font-size: 22px;
            }
        }

        /* ===== Buttons ===== */
        .btn-glow {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border: none;
            padding: 14px 32px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            box-shadow: 0 0 12px var(--glow-secondary);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .btn-glow:hover {
            box-shadow: 0 0 20px rgba(0, 184, 212, 0.6), 0 0 30px var(--glow-accent);
            transform: translateY(-2px);
            color: var(--text-white);
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 8px var(--glow-secondary);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.2);
            padding: 14px 32px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .btn-outline:hover {
            background: rgba(0, 184, 212, 0.15);
            border-color: var(--secondary);
            color: var(--secondary);
        }
        .btn-outline:active {
            background: rgba(0, 184, 212, 0.25);
        }
        .btn-large {
            padding: 18px 48px;
            font-size: 18px;
            border-radius: 12px;
        }
        @media (max-width: 576px) {
            .btn-glow,
            .btn-outline {
                padding: 12px 24px;
                font-size: 14px;
            }
            .btn-large {
                padding: 14px 32px;
                font-size: 16px;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 12, 22, 0.85) 40%, rgba(0, 184, 212, 0.12) 80%, rgba(7, 12, 22, 0.4) 100%);
            z-index: 1;
        }
        .hero-section .hero-bg-glow {
            position: absolute;
            top: -20%;
            right: -10%;
            width: 60%;
            height: 80%;
            background: radial-gradient(ellipse at center, rgba(0, 184, 212, 0.10), transparent 70%);
            z-index: 0;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-section .hero-content {
            max-width: 55%;
        }
        .hero-section h1 {
            font-size: 56px;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .hero-section .hero-sub {
            font-size: 24px;
            font-weight: 400;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .hero-section .hero-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 520px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero-section .hero-actions {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-section .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding: 20px 28px;
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            max-width: 520px;
        }
        .hero-section .hero-stats .stat-item {
            text-align: center;
        }
        .hero-section .hero-stats .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.2;
        }
        .hero-section .hero-stats .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .hero-section .hero-deco {
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 40%;
            height: 70%;
            pointer-events: none;
            z-index: 1;
        }
        .hero-section .hero-deco svg {
            width: 100%;
            height: 100%;
            opacity: 0.3;
        }

        @media (max-width: 991px) {
            .hero-section .hero-content {
                max-width: 100%;
            }
            .hero-section h1 {
                font-size: 42px;
            }
            .hero-section .hero-sub {
                font-size: 20px;
            }
            .hero-section .hero-deco {
                display: none;
            }
            .hero-section .hero-stats {
                max-width: 100%;
                gap: 24px;
                flex-wrap: wrap;
                justify-content: center;
            }
        }
        @media (max-width: 576px) {
            .hero-section h1 {
                font-size: 32px;
            }
            .hero-section .hero-sub {
                font-size: 18px;
            }
            .hero-section .hero-stats {
                padding: 16px 20px;
                gap: 16px;
            }
            .hero-section .hero-stats .stat-number {
                font-size: 26px;
            }
            .hero-section .hero-stats .stat-label {
                font-size: 12px;
            }
        }

        /* ===== Stats Bar ===== */
        .stats-bar {
            background: var(--bg-surface);
            padding: 60px 0;
            position: relative;
            background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .stats-bar .stat-item {
            text-align: center;
            position: relative;
        }
        .stats-bar .stat-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 60px;
            background: rgba(255, 255, 255, 0.08);
        }
        .stats-bar .stat-number {
            font-size: 56px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.2;
        }
        .stats-bar .stat-label {
            font-size: 16px;
            color: var(--text-main);
            margin-top: 8px;
        }
        .stats-bar .stat-icon {
            font-size: 20px;
            color: var(--accent);
            margin-bottom: 8px;
        }
        @media (max-width: 768px) {
            .stats-bar .stat-item:not(:last-child)::after {
                display: none;
            }
            .stats-bar .stat-number {
                font-size: 38px;
            }
            .stats-bar .stat-label {
                font-size: 14px;
            }
            .stats-bar {
                padding: 40px 0;
            }
        }

        /* ===== Capabilities (2 col) ===== */
        .capabilities-grid .cap-card {
            padding: 36px;
        }
        .capabilities-grid .cap-card .cap-icon {
            width: 48px;
            height: 48px;
            color: var(--accent);
            font-size: 36px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .capabilities-grid .cap-card h3 {
            font-size: 26px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .capabilities-grid .cap-card p {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .capabilities-grid .cap-card .cap-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--secondary);
            text-decoration: none;
        }
        .capabilities-grid .cap-card .cap-link:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .capabilities-grid .cap-card {
                padding: 24px;
            }
            .capabilities-grid .cap-card h3 {
                font-size: 22px;
            }
        }

        /* ===== Solutions ===== */
        .solution-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            gap: 24px;
            align-items: flex-start;
        }
        .solution-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.12);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
        }
        .solution-card .sol-icon {
            width: 48px;
            height: 48px;
            color: var(--accent);
            font-size: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .solution-card .sol-body h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .solution-card .sol-body p {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .solution-card .sol-body .sol-features {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }
        .solution-card .sol-body .sol-features li {
            font-size: 14px;
            color: var(--text-main);
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .solution-card .sol-body .sol-features li i {
            color: var(--secondary);
            font-size: 14px;
        }
        .solution-card .sol-body .sol-btn {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.2);
            padding: 10px 24px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
        }
        .solution-card .sol-body .sol-btn:hover {
            background: rgba(0, 184, 212, 0.15);
            border-color: var(--secondary);
            color: var(--secondary);
        }
        .solution-card.border-glow-1 {
            border-color: rgba(0, 184, 212, 0.2);
        }
        .solution-card.border-glow-2 {
            border-color: rgba(124, 92, 191, 0.2);
        }
        @media (max-width: 768px) {
            .solution-card {
                flex-direction: column;
                padding: 24px;
            }
            .solution-card .sol-body h3 {
                font-size: 20px;
            }
        }

        /* ===== Scenarios ===== */
        .scenario-item {
            display: flex;
            gap: 40px;
            align-items: center;
            margin-bottom: 60px;
        }
        .scenario-item.reverse {
            flex-direction: row-reverse;
        }
        .scenario-item .scenario-img {
            flex: 0 0 45%;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .scenario-item .scenario-img img {
            width: 100%;
            height: auto;
            display: block;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }
        .scenario-item .scenario-text {
            flex: 1;
        }
        .scenario-item .scenario-text h3 {
            font-size: 26px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .scenario-item .scenario-text p {
            font-size: 16px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .scenario-item .scenario-text .scenario-tag {
            display: inline-block;
            background: rgba(124, 92, 191, 0.15);
            color: var(--accent);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 12px;
        }
        @media (max-width: 991px) {
            .scenario-item {
                flex-direction: column;
                gap: 24px;
            }
            .scenario-item.reverse {
                flex-direction: column;
            }
            .scenario-item .scenario-img {
                flex: 0 0 100%;
                width: 100%;
            }
            .scenario-item .scenario-text h3 {
                font-size: 22px;
            }
        }

        /* ===== Process ===== */
        .process-step {
            text-align: center;
            padding: 24px 16px;
            position: relative;
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 auto 20px;
            box-shadow: 0 0 16px rgba(0, 184, 212, 0.25);
        }
        .process-step h4 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 240px;
            margin: 0 auto;
        }
        .process-step .step-connector {
            position: absolute;
            top: 44px;
            right: -20px;
            width: 40px;
            height: 2px;
            background: linear-gradient(90deg, var(--secondary), transparent);
        }
        @media (max-width: 768px) {
            .process-step {
                padding: 16px 8px;
            }
            .process-step .step-connector {
                display: none;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-surface);
            background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .faq-item .faq-question {
            padding: 20px 24px;
            background: rgba(255, 255, 255, 0.02);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background var(--transition);
            user-select: none;
        }
        .faq-item .faq-question:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .faq-item .faq-question span {
            font-size: 18px;
            font-weight: 500;
            color: var(--text-main);
            transition: color var(--transition);
        }
        .faq-item .faq-question .faq-icon {
            font-size: 20px;
            color: var(--text-muted);
            transition: transform var(--transition), color var(--transition);
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-item.active .faq-question span {
            color: var(--secondary);
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--secondary);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 24px;
        }
        .faq-item .faq-answer p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }
        @media (max-width: 768px) {
            .faq-item .faq-question {
                padding: 16px 16px;
            }
            .faq-item .faq-question span {
                font-size: 16px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }
            .faq-item .faq-answer {
                padding: 0 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: 100px 0;
        }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section .cta-sub {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 40px;
        }
        .cta-section .cta-badges {
            display: flex;
            justify-content: center;
            gap: 32px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .cta-section .cta-badges .badge-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }
        .cta-section .cta-badges .badge-item .badge-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--secondary);
        }
        .cta-section .cta-badges .badge-item .badge-label {
            font-size: 13px;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section .cta-sub {
                font-size: 16px;
            }
            .cta-section .cta-badges {
                gap: 20px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #050A12;
            padding-top: 60px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .nav-brand-icon {
            width: 28px;
            height: 28px;
            color: var(--secondary);
            flex-shrink: 0;
        }
        .site-footer .footer-brand .nav-brand-icon svg {
            width: 100%;
            height: 100%;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .site-footer .social-icons {
            display: flex;
            gap: 16px;
        }
        .site-footer .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: all var(--transition);
            text-decoration: none;
        }
        .site-footer .social-icons a:hover {
            background: rgba(0, 184, 212, 0.15);
            border-color: var(--secondary);
            color: var(--secondary);
        }
        .site-footer h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 20px;
        }
        .site-footer ul.footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul.footer-links li {
            margin-bottom: 10px;
        }
        .site-footer ul.footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }
        .site-footer ul.footer-links a:hover {
            color: var(--secondary);
        }
        .site-footer .footer-bottom {
            background: rgba(255, 255, 255, 0.02);
            padding: 16px 0;
            margin-top: 40px;
            text-align: center;
        }
        .site-footer .footer-bottom p {
            font-size: 13px;
            color: #666;
            margin: 0;
        }
        @media (max-width: 768px) {
            .site-footer {
                padding-top: 40px;
            }
            .site-footer .footer-brand {
                font-size: 20px;
            }
            .site-footer h5 {
                margin-top: 16px;
            }
            .site-footer .footer-bottom p {
                font-size: 12px;
            }
        }

        /* ===== Tag ===== */
        .tag-badge {
            display: inline-block;
            background: rgba(124, 92, 191, 0.15);
            color: var(--accent);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 4px;
        }

        /* ===== Empty State ===== */
        .empty-state {
            padding: 60px 20px;
            text-align: center;
        }
        .empty-state i {
            font-size: 48px;
            color: var(--text-disabled);
            margin-bottom: 16px;
        }
        .empty-state p {
            font-size: 18px;
            color: var(--text-muted);
        }

        /* ===== Responsive extras ===== */
        @media (max-width: 576px) {
            .hero-section .hero-actions {
                flex-direction: column;
                gap: 12px;
            }
            .hero-section .hero-actions .btn-glow,
            .hero-section .hero-actions .btn-outline {
                width: 100%;
                text-align: center;
            }
            .section-heading .subtitle {
                font-size: 15px;
            }
        }
        @media (min-width: 992px) {
            .capabilities-grid .col-lg-6:first-child {
                padding-right: 12px;
            }
            .capabilities-grid .col-lg-6:last-child {
                padding-left: 12px;
            }
        }
        /* focus-visible for all interactive */
        button:focus-visible,
        a:focus-visible,
        .faq-question:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }