/* roulang page: index */
/* ===== CSS Variables ===== */
        :root {
            --primary: #0A1628;
            --primary-light: #0F1E3A;
            --brand: #00D4FF;
            --secondary: #7B2FFC;
            --accent: #FF6B35;
            --success: #00E676;
            --danger: #FF5252;
            --text-primary: #FFFFFF;
            --text-secondary: #E6F0FF;
            --text-muted: #A0B4D0;
            --text-weak: #6B7F9E;
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-bg-hover: rgba(255, 255, 255, 0.08);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-border-hover: rgba(0, 212, 255, 0.4);
            --card-shadow: 0 8px 32px rgba(0, 212, 255, 0.08);
            --card-shadow-hover: 0 12px 48px rgba(0, 212, 255, 0.18);
            --glow-brand: 0 0 20px rgba(0, 212, 255, 0.4);
            --glow-secondary: 0 0 40px rgba(123, 47, 252, 0.3);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-input: 10px;
            --spacer: 1.5rem;
            --section-gap: 80px;
            --nav-height: 72px;
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--brand);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        ::selection {
            background: rgba(0, 212, 255, 0.3);
            color: #fff;
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 0.5em;
        }
        h1 {
            font-size: 2.25rem;
        }
        h2 {
            font-size: 1.75rem;
        }
        h3 {
            font-size: 1.375rem;
        }
        h4 {
            font-size: 1.125rem;
        }
        @media (max-width: 575.98px) {
            h1 {
                font-size: 1.75rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.15rem;
            }
            body {
                font-size: 15px;
            }
        }

        /* ===== Container ===== */
        .container-custom {
            width: 100%;
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 767.98px) {
            .container-custom {
                padding: 0 1rem;
            }
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: var(--section-gap) 0;
        }
        @media (max-width: 767.98px) {
            .section-padding {
                padding: 48px 0;
            }
        }

        /* ===== Navigation ===== */
        .navbar-main {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-height);
            background: rgba(10, 22, 40, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.2);
            transition: var(--transition);
        }
        .navbar-main .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .navbar-main .nav-left,
        .navbar-main .nav-right {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .navbar-main .nav-left .nav-link,
        .navbar-main .nav-right .nav-link {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-btn);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .navbar-main .nav-left .nav-link:hover,
        .navbar-main .nav-right .nav-link:hover {
            color: var(--brand);
            background: rgba(0, 212, 255, 0.06);
        }
        .navbar-main .nav-left .nav-link.active,
        .navbar-main .nav-right .nav-link.active {
            color: var(--brand);
        }
        .navbar-main .nav-left .nav-link.active::after,
        .navbar-main .nav-right .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--brand);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
            border-radius: 2px;
        }
        .navbar-main .logo-wrap {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
        }
        .navbar-main .logo-wrap .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--brand);
            letter-spacing: 1px;
            text-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
            background: linear-gradient(135deg, var(--brand), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-main .logo-wrap .logo-sub {
            font-size: 0.65rem;
            color: var(--text-muted);
            letter-spacing: 2px;
            display: block;
            margin-top: -2px;
            -webkit-text-fill-color: var(--text-muted);
        }

        /* Hamburger */
        .navbar-main .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            transition: var(--transition);
        }
        .navbar-main .hamburger:hover {
            color: var(--brand);
        }

        /* Mobile Nav */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 22, 40, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 1049;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            padding: 2rem;
            opacity: 0;
            transition: opacity 0.3s ease;
            pointer-events: none;
        }
        .mobile-nav-overlay.open {
            display: flex;
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-overlay .mobile-nav-link {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius-btn);
            transition: var(--transition);
        }
        .mobile-nav-overlay .mobile-nav-link:hover {
            color: var(--brand);
            background: rgba(0, 212, 255, 0.08);
        }
        .mobile-nav-overlay .mobile-nav-link.active {
            color: var(--brand);
        }
        .mobile-nav-overlay .close-btn {
            position: absolute;
            top: 1.5rem;
            right: 1.5rem;
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 2rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .mobile-nav-overlay .close-btn:hover {
            color: var(--brand);
        }

        @media (max-width: 991.98px) {
            .navbar-main .nav-left,
            .navbar-main .nav-right {
                display: none;
            }
            .navbar-main .hamburger {
                display: block;
            }
            .navbar-main .logo-wrap {
                position: static;
                transform: none;
            }
            .navbar-main .container-custom {
                justify-content: space-between;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.88), rgba(10, 22, 40, 0.6)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding-top: var(--nav-height);
            overflow: hidden;
            text-align: center;
        }
        @media (max-width: 767.98px) {
            .hero-section {
                min-height: 70vh;
                text-align: left;
            }
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 2;
            max-width: 880px;
            padding: 2rem 1.5rem;
        }
        .hero-section .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            border-radius: 50px;
            padding: 0.35rem 1.25rem;
            font-size: 0.8125rem;
            color: var(--brand);
            margin-bottom: 1.5rem;
            letter-spacing: 0.5px;
        }
        .hero-section .hero-badge .dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.3);
            }
        }
        .hero-section h1 {
            font-size: 2.75rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            background: linear-gradient(135deg, #FFFFFF 40%, var(--brand) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        @media (max-width: 767.98px) {
            .hero-section h1 {
                font-size: 1.85rem;
            }
        }
        .hero-section .hero-sub {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            letter-spacing: 2px;
        }
        .hero-section .hero-sub span {
            color: var(--brand);
        }
        .hero-section .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        @media (max-width: 575.98px) {
            .hero-section .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
        }
        .hero-section .hero-actions .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2.25rem;
            font-size: 1rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-btn);
            background: var(--brand);
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
            min-height: 48px;
        }
        .hero-section .hero-actions .btn-cta:hover {
            background: var(--secondary);
            box-shadow: 0 0 30px rgba(123, 47, 252, 0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .hero-section .hero-actions .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2.25rem;
            font-size: 1rem;
            font-weight: 600;
            border: 1px solid rgba(0, 212, 255, 0.6);
            border-radius: var(--radius-btn);
            background: transparent;
            color: var(--brand);
            cursor: pointer;
            transition: var(--transition);
            min-height: 48px;
        }
        .hero-section .hero-actions .btn-secondary:hover {
            background: rgba(0, 212, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
            transform: translateY(-2px);
        }
        .hero-section .scroll-indicator {
            position: absolute;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%);
            color: var(--text-muted);
            font-size: 1.25rem;
            animation: bounce-down 2s infinite;
            cursor: pointer;
        }
        @keyframes bounce-down {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        /* ===== Buttons ===== */
        .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 2rem;
            font-size: 0.9375rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-btn);
            background: var(--brand);
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
            min-height: 48px;
            text-decoration: none;
        }
        .btn-brand:hover {
            background: var(--secondary);
            box-shadow: 0 0 30px rgba(123, 47, 252, 0.35);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-brand {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 2rem;
            font-size: 0.9375rem;
            font-weight: 600;
            border: 1px solid rgba(0, 212, 255, 0.6);
            border-radius: var(--radius-btn);
            background: transparent;
            color: var(--brand);
            cursor: pointer;
            transition: var(--transition);
            min-height: 48px;
            text-decoration: none;
        }
        .btn-outline-brand:hover {
            background: rgba(0, 212, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
            transform: translateY(-2px);
            color: var(--brand);
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 2rem;
            font-size: 0.9375rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #fff;
            cursor: pointer;
            transition: var(--transition);
            min-height: 48px;
            text-decoration: none;
        }
        .btn-accent:hover {
            background: #e85a2a;
            box-shadow: 0 0 25px rgba(255, 107, 53, 0.4);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            transition: var(--transition);
            height: 100%;
        }
        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }
        .glass-card .card-icon {
            font-size: 2rem;
            color: var(--brand);
            margin-bottom: 1rem;
        }
        .glass-card h3 {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
        }
        .glass-card p {
            color: var(--text-muted);
            font-size: 0.9375rem;
            margin-bottom: 0;
        }

        /* ===== Section Headers ===== */
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header h2 {
            margin-bottom: 0.5rem;
        }
        .section-header .section-subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 640px;
            margin: 0 auto;
        }

        /* ===== Alternate Background ===== */
        .bg-alt {
            background: var(--primary-light);
        }

        /* ===== Scene Block (Two Columns) ===== */
        .scene-block {
            display: flex;
            align-items: center;
            gap: 3rem;
        }
        .scene-block .scene-image {
            flex: 0 0 48%;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }
        .scene-block .scene-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .scene-block .scene-list {
            flex: 1;
        }
        .scene-block .scene-list .scene-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .scene-block .scene-list .scene-item:last-child {
            border-bottom: none;
        }
        .scene-block .scene-list .scene-item .item-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(0, 212, 255, 0.1);
            color: var(--brand);
            font-size: 1.2rem;
        }
        .scene-block .scene-list .scene-item .item-content h4 {
            font-size: 1.05rem;
            margin-bottom: 0.2rem;
        }
        .scene-block .scene-list .scene-item .item-content p {
            color: var(--text-muted);
            font-size: 0.875rem;
            margin-bottom: 0.3rem;
        }
        .scene-block .scene-list .scene-item .item-content .btn-sm-link {
            font-size: 0.8125rem;
            color: var(--brand);
            background: none;
            border: none;
            padding: 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .scene-block .scene-list .scene-item .item-content .btn-sm-link:hover {
            color: var(--secondary);
        }
        @media (max-width: 767.98px) {
            .scene-block {
                flex-direction: column;
                gap: 2rem;
            }
            .scene-block .scene-image {
                flex: 0 0 100%;
                width: 100%;
            }
        }

        /* ===== Stats / Data Cards ===== */
        .stat-card {
            text-align: center;
            padding: 2rem 1rem;
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            transition: var(--transition);
            height: 100%;
        }
        .stat-card:hover {
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--card-shadow-hover);
        }
        .stat-card .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--brand), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .stat-label {
            color: var(--text-muted);
            font-size: 0.9375rem;
            margin-top: 0.35rem;
        }

        /* ===== Brand Logo Wall ===== */
        .brand-wall {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 2rem 3rem;
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .brand-wall .brand-item {
            color: var(--text-weak);
            font-size: 1.5rem;
            font-weight: 300;
            letter-spacing: 1px;
            transition: var(--transition);
            opacity: 0.5;
            filter: grayscale(1);
        }
        .brand-wall .brand-item:hover {
            color: var(--brand);
            opacity: 1;
            filter: grayscale(0);
        }

        /* ===== Pricing / VIP Cards ===== */
        .pricing-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            transition: var(--transition);
            text-align: center;
            height: 100%;
            position: relative;
        }
        .pricing-card.featured {
            transform: scale(1.04);
            border-color: rgba(123, 47, 252, 0.4);
            box-shadow: 0 0 40px rgba(123, 47, 252, 0.15);
            background: rgba(123, 47, 252, 0.06);
        }
        .pricing-card.featured .pricing-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--secondary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 1.25rem;
            border-radius: 50px;
            letter-spacing: 0.5px;
        }
        .pricing-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }
        .pricing-card.featured:hover {
            transform: scale(1.04) translateY(-4px);
        }
        .pricing-card .pricing-name {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 0.25rem;
        }
        .pricing-card .pricing-price {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1.25rem;
        }
        .pricing-card .pricing-price .currency {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--brand);
        }
        .pricing-card .pricing-perks {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem 0;
            text-align: left;
        }
        .pricing-card .pricing-perks li {
            padding: 0.4rem 0;
            color: var(--text-muted);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .pricing-card .pricing-perks li i {
            color: var(--success);
            font-size: 0.8rem;
            width: 18px;
        }
        .pricing-card .pricing-perks li .highlight {
            color: var(--text-primary);
            font-weight: 600;
        }
        @media (max-width: 767.98px) {
            .pricing-card.featured {
                transform: none;
            }
            .pricing-card.featured:hover {
                transform: translateY(-4px);
            }
        }

        /* ===== News / CMS List ===== */
        .news-list-item {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            padding: 1rem 1.25rem;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            transition: var(--transition);
            cursor: pointer;
            margin-bottom: 0.75rem;
        }
        .news-list-item:hover {
            background: rgba(0, 212, 255, 0.04);
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--card-shadow);
        }
        .news-list-item .news-thumb {
            flex-shrink: 0;
            width: 80px;
            height: 80px;
            border-radius: 8px;
            overflow: hidden;
            background: var(--primary-light);
        }
        .news-list-item .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-list-item .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-list-item .news-body .news-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-list-item .news-body .news-summary {
            font-size: 0.875rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.25rem;
        }
        .news-list-item .news-body .news-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8125rem;
            color: var(--text-weak);
        }
        .news-list-item .news-body .news-meta .tag {
            display: inline-block;
            padding: 0.1rem 0.6rem;
            border-radius: 4px;
            background: rgba(0, 212, 255, 0.1);
            color: var(--brand);
            font-size: 0.75rem;
        }
        @media (max-width: 575.98px) {
            .news-list-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .news-list-item .news-thumb {
                width: 100%;
                height: 140px;
            }
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 3rem 1.5rem;
            color: var(--text-weak);
        }
        .empty-state i {
            font-size: 3rem;
            margin-bottom: 1rem;
            opacity: 0.5;
        }
        .empty-state p {
            font-size: 1rem;
            color: var(--text-weak);
        }

        /* ===== FAQ Accordion ===== */
        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 1rem;
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .faq-question .faq-toggle {
            color: var(--brand);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .faq-item .faq-question .faq-toggle.open {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1rem 1.5rem;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item .faq-answer.open {
            display: block;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.9), rgba(15, 30, 58, 0.9)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            padding: 5rem 0;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 2rem auto;
        }

        /* ===== Footer ===== */
        .footer-main {
            background: #050D1A;
            padding: 4rem 0 1.5rem 0;
            border-top: 1px solid rgba(0, 212, 255, 0.15);
        }
        .footer-main .footer-logo {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--brand), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.5rem;
        }
        .footer-main .footer-desc {
            color: var(--text-weak);
            font-size: 0.9rem;
            max-width: 320px;
        }
        .footer-main .footer-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer-main .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-main .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-main .footer-links li a {
            color: var(--text-weak);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-main .footer-links li a:hover {
            color: var(--brand);
        }
        .footer-main .footer-contact p {
            color: var(--text-weak);
            font-size: 0.9rem;
            margin-bottom: 0.35rem;
        }
        .footer-main .footer-contact p i {
            width: 20px;
            color: var(--brand);
        }
        .footer-main .footer-social {
            display: flex;
            gap: 0.75rem;
            margin-top: 1rem;
        }
        .footer-main .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-main .footer-social a:hover {
            background: var(--brand);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .footer-main .footer-bottom {
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(0, 212, 255, 0.1);
            text-align: center;
            color: var(--text-weak);
            font-size: 0.85rem;
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 575.98px) {
            .section-padding {
                padding: 36px 0;
            }
            .hero-section .hero-content {
                padding: 1.5rem 1rem;
            }
            .stat-card .stat-number {
                font-size: 2rem;
            }
            .pricing-card .pricing-price {
                font-size: 2rem;
            }
            .brand-wall .brand-item {
                font-size: 1.1rem;
            }
            .footer-main {
                padding: 2.5rem 0 1rem 0;
            }
        }
        @media (min-width: 576px) and (max-width: 767.98px) {
            .hero-section h1 {
                font-size: 2.2rem;
            }
        }
        @media (min-width: 768px) and (max-width: 991.98px) {
            .hero-section h1 {
                font-size: 2.4rem;
            }
        }

        /* ===== Focus / Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 3px;
        }

        /* ===== Smooth scroll offset ===== */
        .scroll-offset {
            scroll-margin-top: calc(var(--nav-height) + 20px);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00D4FF;
            --primary-dark: #0099cc;
            --secondary: #7B2FFC;
            --accent: #FF6B35;
            --bg-deep: #0A1628;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --bg-section: #0F1E3A;
            --text-light: #E6F0FF;
            --text-muted: #A0B4D0;
            --text-dark: #0A1628;
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(0, 212, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 212, 255, 0.08), 0 0 1px rgba(0, 212, 255, 0.3) inset;
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-input: 10px;
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s ease;
            --header-height: 72px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg-deep);
            color: var(--text-light);
            line-height: 1.7;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }
        li {
            margin-bottom: 0.25rem;
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== 导航 ===== */
        .navbar-main {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--header-height);
            background: rgba(10, 22, 40, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.2);
            display: flex;
            align-items: center;
        }
        .navbar-main .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 0.25rem;
            margin: 0;
            padding: 0;
        }
        .nav-left li,
        .nav-right li {
            margin: 0;
        }
        .nav-link {
            display: inline-block;
            padding: 0.5rem 1rem;
            font-size: 0.9375rem;
            font-weight: 400;
            color: var(--text-muted);
            border-radius: 6px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--primary);
        }
        .logo-wrap {
            display: flex;
            flex-direction: column;
            align-items: center;
            line-height: 1.2;
            text-align: center;
            user-select: none;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
            transition: var(--transition);
        }
        .logo-text:hover {
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
        }
        .logo-sub {
            font-size: 0.7rem;
            color: var(--text-muted);
            letter-spacing: 2px;
            margin-top: 1px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 6px;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: rgba(0, 212, 255, 0.08);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-area {
            padding: 1.5rem 0 0.5rem;
            background: var(--bg-deep);
        }
        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.5rem;
            font-size: 0.875rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-custom li {
            margin: 0;
        }
        .breadcrumb-custom li+li::before {
            content: '›';
            margin-right: 0.5rem;
            color: var(--text-muted);
        }
        .breadcrumb-custom a {
            color: var(--text-muted);
        }
        .breadcrumb-custom a:hover {
            color: var(--primary);
        }
        .breadcrumb-custom .current {
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== 文章头部 ===== */
        .article-header {
            padding: 2rem 0 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .article-header h1 {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin: 0 0 1rem 0;
            letter-spacing: 0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem 1.5rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            align-items: center;
        }
        .article-meta i {
            margin-right: 0.35rem;
            color: var(--primary);
            opacity: 0.7;
        }
        .article-meta .category-tag {
            background: rgba(123, 47, 252, 0.2);
            color: var(--secondary);
            padding: 0.15rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8125rem;
            border: 1px solid rgba(123, 47, 252, 0.3);
        }
        .article-meta .category-tag i {
            color: var(--secondary);
            opacity: 1;
        }

        /* ===== 正文阅读区 ===== */
        .article-content-wrap {
            max-width: 820px;
            margin: 0 auto;
            padding: 2.5rem 0 3rem;
        }
        .article-body {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--text-light);
        }
        .article-body p {
            margin-bottom: 1.5rem;
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: #fff;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        .article-body h2 {
            font-size: 1.75rem;
            border-bottom: 1px solid rgba(0, 212, 255, 0.15);
            padding-bottom: 0.5rem;
        }
        .article-body h3 {
            font-size: 1.375rem;
        }
        .article-body img {
            border-radius: 12px;
            margin: 1.5rem auto;
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(0, 212, 255, 0.05);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.5rem;
        }
        .article-body ul li {
            list-style-type: disc;
            margin-bottom: 0.4rem;
        }
        .article-body ol li {
            list-style-type: decimal;
            margin-bottom: 0.4rem;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: #fff;
        }
        .article-body code {
            background: rgba(0, 212, 255, 0.08);
            color: var(--primary);
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-body pre {
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(0, 212, 255, 0.12);
            border-radius: 10px;
            padding: 1.25rem;
            overflow-x: auto;
            margin: 1.5rem 0;
        }
        .article-body pre code {
            background: none;
            padding: 0;
            color: var(--text-light);
        }

        /* ===== 空状态 ===== */
        .article-not-found {
            text-align: center;
            padding: 4rem 2rem;
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            opacity: 0.4;
            margin-bottom: 1.5rem;
        }
        .article-not-found h3 {
            font-size: 1.5rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .article-not-found .btn-back {
            display: inline-block;
            padding: 0.75rem 2rem;
            background: var(--primary);
            color: var(--text-dark);
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: var(--transition);
        }
        .article-not-found .btn-back:hover {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 0 30px rgba(123, 47, 252, 0.4);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 2.5rem 0 3rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.5rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }
        .related-card {
            display: flex;
            gap: 1rem;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 1rem;
            transition: var(--transition);
            cursor: pointer;
        }
        .related-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(0, 212, 255, 0.4);
            box-shadow: 0 8px 32px rgba(0, 212, 255, 0.06);
            transform: translateY(-2px);
        }
        .related-card .thumb {
            width: 80px;
            height: 80px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-section);
        }
        .related-card .info {
            flex: 1;
            min-width: 0;
        }
        .related-card .info .title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 0.3rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .info .time {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }
        .related-back {
            margin-top: 2rem;
            text-align: center;
        }
        .related-back a {
            color: var(--text-muted);
            font-size: 0.9375rem;
            transition: var(--transition);
        }
        .related-back a:hover {
            color: var(--primary);
        }
        .related-back a i {
            margin-right: 0.4rem;
        }

        /* ===== 页脚 ===== */
        .footer-main {
            background: #050D1A;
            border-top: 1px solid rgba(0, 212, 255, 0.08);
            padding: 3.5rem 0 0;
        }
        .footer-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
            letter-spacing: 1px;
            text-shadow: 0 0 10px rgba(0, 212, 255, 0.2);
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-title {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-contact p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }
        .footer-contact i {
            color: var(--primary);
            width: 1.5rem;
            opacity: 0.7;
        }
        .footer-social {
            display: flex;
            gap: 0.75rem;
            margin-top: 0.5rem;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 10px;
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-dark);
            border-color: var(--primary);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(0, 212, 255, 0.10);
            padding: 1.25rem 0;
            margin-top: 2.5rem;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.3);
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .navbar-main .container-custom {
                justify-content: space-between;
            }
            .logo-wrap {
                margin: 0 auto;
            }
            .mobile-nav-open .nav-left,
            .mobile-nav-open .nav-right {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 22, 40, 0.98);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                padding: 1.5rem 1.5rem 2rem;
                border-bottom: 1px solid rgba(0, 212, 255, 0.15);
                gap: 0.25rem;
                z-index: 1040;
            }
            .mobile-nav-open .nav-left {
                top: var(--header-height);
            }
            .mobile-nav-open .nav-right {
                top: calc(var(--header-height) + 180px);
            }
            .mobile-nav-open .nav-link {
                font-size: 1.1rem;
                padding: 0.75rem 1rem;
            }
            .mobile-nav-open .nav-link.active::after {
                display: none;
            }
            .article-header h1 {
                font-size: 1.75rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 767.98px) {
            .container-custom {
                padding: 0 1rem;
            }
            .article-header h1 {
                font-size: 1.5rem;
            }
            .article-body {
                font-size: 1rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-card .thumb {
                width: 64px;
                height: 64px;
            }
            .footer-main .row>div {
                margin-bottom: 1.5rem;
            }
        }

        @media (max-width: 575.98px) {
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.4rem;
            }
            .article-header h1 {
                font-size: 1.35rem;
            }
            .article-body blockquote {
                padding: 0.75rem 1rem;
            }
        }

        /* ===== 面包屑响应式微调 ===== */
        @media (max-width: 575.98px) {
            .breadcrumb-custom {
                font-size: 0.8125rem;
                gap: 0.3rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0A1628;
            --primary-light: #0F1E3A;
            --brand: #00D4FF;
            --secondary: #7B2FFC;
            --accent: #FF6B35;
            --success: #00E676;
            --danger: #FF5252;
            --text-main: #E6F0FF;
            --text-muted: #A0B4D0;
            --text-dim: #6B7F9E;
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-bg-hover: rgba(255, 255, 255, 0.08);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-border-hover: rgba(0, 212, 255, 0.4);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-input: 10px;
            --shadow-card: 0 8px 32px rgba(0, 212, 255, 0.08);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --nav-height: 72px;
            --spacer: 1.5rem;
            --container-max: 1320px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background: var(--primary);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--brand);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #66e5ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding: 0 32px;
            }
        }
        @media (min-width: 1200px) {
            .container-custom {
                padding: 0 40px;
            }
        }

        /* ===== Navigation ===== */
        .navbar-main {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(10, 22, 40, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.2);
            z-index: 1050;
            display: flex;
            align-items: center;
        }
        .navbar-main .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .nav-left,
        .nav-right {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
            margin: 0;
        }
        .nav-left .nav-link,
        .nav-right .nav-link {
            color: var(--text-muted);
            font-size: 0.9375rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .nav-left .nav-link:hover,
        .nav-right .nav-link:hover {
            color: var(--brand);
            background: rgba(0, 212, 255, 0.06);
        }
        .nav-left .nav-link.active,
        .nav-right .nav-link.active {
            color: var(--brand);
            box-shadow: inset 0 -2px 0 var(--brand);
        }
        .logo-wrap {
            display: flex;
            flex-direction: column;
            align-items: center;
            line-height: 1.2;
            text-align: center;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--brand);
            letter-spacing: 1px;
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
        }
        .logo-text:hover {
            color: var(--brand);
        }
        .logo-sub {
            font-size: 0.7rem;
            color: var(--text-muted);
            letter-spacing: 2px;
            text-transform: uppercase;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-main);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
        }
        @media (max-width: 991px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .navbar-main .container-custom {
                justify-content: space-between;
            }
            .logo-wrap {
                order: 0;
            }
            .hamburger {
                order: -1;
            }
            .nav-spacer {
                display: none;
            }
            .nav-mobile-open .nav-left,
            .nav-mobile-open .nav-right {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(10, 22, 40, 0.98);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                padding: 20px 24px;
                gap: 12px;
                border-bottom: 1px solid rgba(0, 212, 255, 0.15);
                z-index: 1049;
            }
            .nav-mobile-open .nav-left {
                top: var(--nav-height);
            }
            .nav-mobile-open .nav-right {
                top: calc(var(--nav-height) + 220px);
            }
            .nav-mobile-open .nav-left .nav-link,
            .nav-mobile-open .nav-right .nav-link {
                font-size: 1.1rem;
                padding: 12px 16px;
            }
        }
        @media (min-width: 992px) {
            .nav-left,
            .nav-right {
                display: flex !important;
            }
            .hamburger {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .category-hero {
            margin-top: var(--nav-height);
            min-height: 30vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.88), rgba(10, 22, 40, 0.6)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 60px 20px;
            border-bottom: 1px solid rgba(0, 212, 255, 0.08);
        }
        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }
        .category-hero p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 24px;
        }
        @media (max-width: 767px) {
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
        }

        /* ===== Section通用 ===== */
        .section-pad {
            padding: 72px 0;
        }
        .section-pad-sm {
            padding: 48px 0;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-sub {
            font-size: 1rem;
            color: var(--text-muted);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 40px;
        }
        .bg-alt {
            background: var(--primary-light);
        }
        .bg-darker {
            background: #050D1A;
        }

        /* ===== 卡片 ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }
        .glass-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.12);
            transform: translateY(-4px);
            background: var(--glass-bg-hover);
        }
        .glass-card .card-icon {
            font-size: 2rem;
            color: var(--brand);
            margin-bottom: 16px;
        }
        .glass-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }
        .glass-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .glass-card .card-tag {
            display: inline-block;
            background: rgba(0, 212, 255, 0.12);
            color: var(--brand);
            font-size: 0.75rem;
            padding: 2px 10px;
            border-radius: 20px;
            margin-top: 12px;
        }

        /* ===== 游戏分类卡片 ===== */
        .game-cat-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            height: 100%;
        }
        .game-cat-card:hover {
            border-color: var(--glass-border-hover);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.12);
            transform: translateY(-4px);
        }
        .game-cat-card .cat-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid rgba(0, 212, 255, 0.06);
        }
        .game-cat-card .cat-body {
            padding: 20px 20px 24px;
        }
        .game-cat-card .cat-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }
        .game-cat-card .cat-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .game-cat-card .cat-body .badge-custom {
            display: inline-block;
            background: rgba(123, 47, 252, 0.2);
            color: #c084fc;
            font-size: 0.75rem;
            padding: 2px 12px;
            border-radius: 20px;
            margin-right: 6px;
            margin-bottom: 4px;
        }

        /* ===== 数据统计 ===== */
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--brand);
            line-height: 1.2;
        }
        .stat-number .stat-unit {
            font-size: 1.2rem;
            color: var(--text-muted);
            font-weight: 400;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 特色功能列表 ===== */
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-list li .feat-icon {
            font-size: 1.4rem;
            color: var(--brand);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .feature-list li .feat-text h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }
        .feature-list li .feat-text p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 500;
            color: #fff;
            font-size: 1rem;
            background: transparent;
            transition: background 0.25s ease;
            user-select: none;
        }
        .faq-question:hover {
            background: rgba(0, 212, 255, 0.04);
        }
        .faq-question .faq-toggle {
            color: var(--brand);
            font-size: 1.2rem;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-question .faq-toggle {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 22px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            background: rgba(0, 212, 255, 0.02);
        }
        .faq-item.active .faq-answer {
            max-height: 260px;
            padding: 0 22px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(123, 47, 252, 0.06));
            border-top: 1px solid rgba(0, 212, 255, 0.1);
            border-bottom: 1px solid rgba(0, 212, 255, 0.1);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--brand);
            color: var(--primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.25);
            min-height: 48px;
            text-decoration: none;
        }
        .btn-primary-custom:hover {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 0 30px rgba(123, 47, 252, 0.4);
            transform: translateY(-2px);
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--brand);
            font-weight: 500;
            font-size: 1rem;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(0, 212, 255, 0.6);
            cursor: pointer;
            transition: all 0.25s ease;
            min-height: 48px;
            text-decoration: none;
        }
        .btn-secondary-custom:hover {
            background: rgba(0, 212, 255, 0.1);
            color: var(--brand);
            border-color: var(--brand);
        }

        /* ===== Footer ===== */
        .footer-main {
            background: #050D1A;
            padding: 60px 0 0;
            border-top: 1px solid rgba(0, 212, 255, 0.08);
        }
        .footer-logo {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--brand);
            margin-bottom: 12px;
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.2);
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-title {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.25s ease;
        }
        .footer-links li a:hover {
            color: var(--brand);
        }
        .footer-contact p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact p i {
            width: 18px;
            color: var(--brand);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: all 0.25s ease;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-social a:hover {
            background: rgba(0, 212, 255, 0.12);
            color: var(--brand);
            border-color: rgba(0, 212, 255, 0.3);
        }
        .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(0, 212, 255, 0.1);
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-dim);
            margin-bottom: 0;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 767px) {
            .section-pad {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .game-cat-card .cat-img {
                height: 140px;
            }
            .btn-primary-custom,
            .btn-secondary-custom {
                width: 100%;
                justify-content: center;
            }
            .footer-main .row>div {
                margin-bottom: 24px;
            }
        }
        @media (max-width: 575px) {
            .category-hero {
                min-height: 26vh;
                padding: 40px 16px;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .glass-card {
                padding: 20px 16px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.9rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }
        }
        @media (max-width: 991px) and (min-width: 768px) {
            .game-cat-card .cat-img {
                height: 160px;
            }
        }
        @media (min-width: 992px) {
            .game-cat-card .cat-img {
                height: 200px;
            }
        }
        /* 导航占位 */
        .nav-spacer {
            width: 40px;
            flex-shrink: 0;
        }
        @media (max-width: 991px) {
            .nav-spacer {
                display: none;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0A1628;
            --primary-light: #0F1E3A;
            --brand: #00D4FF;
            --brand-glow: rgba(0, 212, 255, 0.3);
            --secondary: #7B2FFC;
            --accent: #FF6B35;
            --success: #00E676;
            --error: #FF5252;
            --text-primary: #E6F0FF;
            --text-secondary: #A0B4D0;
            --text-muted: #6B7F9E;
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-hover: rgba(0, 212, 255, 0.06);
            --card-radius: 16px;
            --btn-radius: 8px;
            --input-radius: 10px;
            --shadow-card: 0 8px 32px rgba(0, 212, 255, 0.08);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --nav-height: 72px;
            --spacer: 1.5rem;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--brand);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--secondary);
        }

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

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

        ul,
        ol {
            list-style: none;
            padding: 0;
        }

        .container-custom {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
        }

        .section-title {
            font-size: 28px;
            margin-bottom: 12px;
            text-align: center;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        /* ===== Navbar ===== */
        .navbar-main {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-height);
            background: rgba(10, 22, 40, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.2);
            display: flex;
            align-items: center;
        }

        .navbar-main .container-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            transition: all 0.25s ease;
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--brand);
            background: rgba(0, 212, 255, 0.06);
        }

        .nav-link.active {
            color: var(--brand);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--brand-glow);
        }

        .logo-wrap {
            display: flex;
            flex-direction: column;
            align-items: center;
            line-height: 1.2;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
        }

        .logo-text:hover {
            color: var(--brand);
        }

        .logo-sub {
            font-size: 11px;
            color: var(--brand);
            letter-spacing: 2px;
            text-transform: uppercase;
            font-weight: 500;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 24px;
            padding: 8px;
            cursor: pointer;
            transition: color 0.25s;
        }

        .hamburger:hover {
            color: var(--brand);
        }

        /* ===== Hero (矮版) ===== */
        .category-hero {
            padding: 140px 0 64px;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.88), rgba(10, 22, 40, 0.6)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            min-height: 30vh;
            display: flex;
            align-items: center;
            text-align: center;
            border-bottom: 1px solid rgba(0, 212, 255, 0.08);
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff, var(--brand));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-hero p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .category-hero .hero-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--brand);
            color: var(--primary);
            font-weight: 600;
            font-size: 16px;
            padding: 14px 36px;
            border: none;
            border-radius: var(--btn-radius);
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
            min-height: 48px;
            text-decoration: none;
        }

        .btn-primary-custom:hover {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 0 40px rgba(123, 47, 252, 0.4);
            transform: translateY(-2px);
            text-decoration: none;
        }

        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--brand);
            font-weight: 600;
            font-size: 16px;
            padding: 14px 36px;
            border: 1px solid rgba(0, 212, 255, 0.6);
            border-radius: var(--btn-radius);
            cursor: pointer;
            transition: all 0.3s ease;
            min-height: 48px;
            text-decoration: none;
        }

        .btn-secondary-custom:hover {
            background: rgba(0, 212, 255, 0.1);
            color: var(--brand);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
            transform: translateY(-2px);
            text-decoration: none;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 72px 0;
        }

        .section-block-alt {
            background: var(--primary-light);
            padding: 72px 0;
        }

        /* ===== 保障卡片 ===== */
        .guarantee-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--card-radius);
            padding: 32px 24px;
            text-align: center;
            transition: all 0.3s ease;
            height: 100%;
        }

        .guarantee-card:hover {
            border-color: rgba(0, 212, 255, 0.4);
            box-shadow: 0 8px 40px rgba(0, 212, 255, 0.12);
            transform: translateY(-4px);
        }

        .guarantee-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            color: var(--brand);
            transition: all 0.3s;
        }

        .guarantee-card:hover .icon-wrap {
            background: rgba(0, 212, 255, 0.2);
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.2);
        }

        .guarantee-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .guarantee-card p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 0;
        }

        /* ===== 流程步骤 ===== */
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            margin-bottom: 32px;
        }

        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
        }

        .step-content h4 {
            font-size: 18px;
            margin-bottom: 6px;
        }

        .step-content p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 0;
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-accordion .accordion-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--glass-border);
            border-radius: 12px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-accordion .accordion-button {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            transition: background 0.25s;
        }

        .faq-accordion .accordion-button:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 212, 255, 0.06);
            color: var(--brand);
        }

        .faq-accordion .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            background: none;
            width: auto;
            height: auto;
            color: var(--brand);
            font-size: 14px;
            transition: transform 0.3s;
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }

        .faq-accordion .accordion-body {
            background: rgba(0, 212, 255, 0.02);
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            padding: 0 24px 20px;
            border-top: 1px solid rgba(0, 212, 255, 0.06);
        }

        /* ===== CTA 板块 ===== */
        .cta-block {
            padding: 80px 0;
            text-align: center;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.92), rgba(15, 30, 58, 0.88)), url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
        }

        .cta-block h2 {
            font-size: 32px;
            margin-bottom: 16px;
        }

        .cta-block p {
            color: var(--text-secondary);
            font-size: 18px;
            max-width: 520px;
            margin: 0 auto 32px;
        }

        .cta-block .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .footer-main {
            background: #050D1A;
            padding: 64px 0 0;
            border-top: 1px solid rgba(0, 212, 255, 0.15);
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--brand);
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            transition: color 0.25s;
        }

        .footer-links a:hover {
            color: var(--brand);
        }

        .footer-contact p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--brand);
            width: 16px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 18px;
            transition: all 0.3s;
        }

        .footer-social a:hover {
            background: var(--brand);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        }

        .footer-bottom {
            border-top: 1px solid rgba(0, 212, 255, 0.1);
            padding: 20px 0;
            margin-top: 48px;
            text-align: center;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 13px;
            margin-bottom: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .nav-link {
                font-size: 14px;
                padding: 6px 12px;
            }
            .logo-text {
                font-size: 20px;
            }
        }

        @media (max-width: 991.98px) {
            .navbar-main .container-custom {
                justify-content: space-between;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .hamburger {
                display: block;
                order: -1;
            }

            .logo-wrap {
                position: static;
                transform: none;
                order: 0;
            }

            .navbar-main .container-custom {
                flex-wrap: nowrap;
            }

            /* 移动端菜单通过 Bootstrap collapse 实现，这里保留结构 */
            .mobile-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 22, 40, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                padding: 24px 32px;
                border-bottom: 1px solid rgba(0, 212, 255, 0.15);
                display: none;
                z-index: 1040;
                flex-direction: column;
                gap: 12px;
            }

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

            .mobile-nav .nav-link {
                font-size: 17px;
                padding: 12px 16px;
                border-radius: 8px;
            }

            .mobile-nav .nav-link:hover {
                background: rgba(0, 212, 255, 0.08);
            }

            .mobile-nav .nav-link.active {
                background: rgba(0, 212, 255, 0.1);
            }

            .mobile-nav .nav-link.active::after {
                display: none;
            }
        }

        @media (max-width: 767.98px) {
            .container-custom {
                padding: 0 16px;
            }

            .category-hero {
                padding: 120px 0 48px;
                min-height: 25vh;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .category-hero p {
                font-size: 16px;
            }

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

            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }

            .section-block {
                padding: 48px 0;
            }
            .section-block-alt {
                padding: 48px 0;
            }

            .guarantee-card {
                padding: 24px 16px;
            }

            .guarantee-card .icon-wrap {
                width: 52px;
                height: 52px;
                font-size: 22px;
            }

            .guarantee-card h3 {
                font-size: 18px;
            }

            .step-item {
                gap: 16px;
            }

            .step-number {
                width: 40px;
                height: 40px;
                font-size: 17px;
            }

            .step-content h4 {
                font-size: 16px;
            }

            .cta-block {
                padding: 48px 24px;
            }

            .cta-block h2 {
                font-size: 26px;
            }

            .cta-block p {
                font-size: 16px;
            }

            .btn-primary-custom,
            .btn-secondary-custom {
                padding: 12px 28px;
                font-size: 15px;
                min-height: 44px;
            }

            .footer-main {
                padding: 48px 0 0;
            }

            .footer-bottom {
                margin-top: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero h1 {
                font-size: 24px;
            }

            .category-hero p {
                font-size: 15px;
            }

            .section-title {
                font-size: 22px;
            }

            .guarantee-card .icon-wrap {
                width: 48px;
                height: 48px;
                font-size: 20px;
            }

            .faq-accordion .accordion-button {
                font-size: 15px;
                padding: 16px 18px;
            }

            .faq-accordion .accordion-body {
                font-size: 14px;
                padding: 0 18px 16px;
            }

            .cta-block h2 {
                font-size: 22px;
            }
        }

        @media (min-width: 992px) {
            .mobile-nav {
                display: none !important;
            }
        }