/* roulang page: index */
:root {
            --color-primary: #0A4B7A;
            --color-primary-dark: #083B5E;
            --color-accent: #00E5FF;
            --color-accent-glow: rgba(0, 229, 255, 0.35);
            --color-bg: #0B0F1A;
            --color-bg-card: #121826;
            --color-bg-nav: #0B0F1A;
            --color-bg-section: #121826;
            --color-text: #E0E6F0;
            --color-text-secondary: #8892B0;
            --color-text-title: #FFFFFF;
            --color-border: rgba(255, 255, 255, 0.1);
            --color-border-glow: rgba(0, 229, 255, 0.4);
            --radius-card: 16px;
            --radius-btn: 24px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
            --transition-base: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Roboto', sans-serif;
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea {
            font-family: var(--font-family);
            outline: none;
        }

        .container {
            max-width: var(--container-max);
            padding-left: 15px;
            padding-right: 15px;
            margin: 0 auto;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--color-bg-nav);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            position: sticky;
            top: 0;
            z-index: 1050;
            height: 72px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text-title);
            letter-spacing: 1px;
        }
        .site-logo i {
            color: var(--color-accent);
            font-size: 28px;
            filter: drop-shadow(0 0 6px var(--color-accent-glow));
        }
        .site-logo span {
            background: linear-gradient(135deg, #E0E6F0, var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-list .nav-item {
            position: relative;
        }
        .nav-list .nav-link {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            position: relative;
        }
        .nav-list .nav-link:hover {
            color: var(--color-text-title);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-list .nav-link.active {
            color: var(--color-text-title);
            background: rgba(0, 229, 255, 0.1);
            box-shadow: inset 0 -2px 0 var(--color-accent);
        }
        .nav-list .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--color-accent);
            box-shadow: 0 0 10px var(--color-accent-glow);
            border-radius: 2px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff !important;
            padding: 8px 24px !important;
            border-radius: var(--radius-btn) !important;
            font-weight: 600 !important;
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
            transition: all var(--transition-base);
        }
        .nav-cta:hover {
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
            color: #fff !important;
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent));
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            padding: 6px 10px;
            cursor: pointer;
        }
        .navbar-toggler .toggler-icon {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-accent);
            margin: 5px 0;
            border-radius: 2px;
            transition: all var(--transition-base);
            box-shadow: 0 0 6px var(--color-accent-glow);
        }

        /* ===== Hero ===== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background: var(--color-bg);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(10, 75, 122, 0.25) 0%, rgba(11, 15, 26, 0.85) 70%);
            z-index: 1;
        }
        .hero-overlay-grid {
            position: absolute;
            inset: 0;
            z-index: 1;
            background-image:
                linear-gradient(rgba(0, 229, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
            background-size: 60px 60px;
            opacity: 0.5;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 40px 20px;
            max-width: 900px;
        }
        .hero-content h1 {
            font-size: 56px;
            font-weight: 700;
            color: var(--color-text-title);
            text-shadow: 0 0 30px rgba(0, 229, 255, 0.35);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .hero-content .hero-sub {
            font-size: 20px;
            color: var(--color-text-secondary);
            margin-bottom: 36px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .hero-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }
        .btn-cta-primary {
            display: inline-block;
            padding: 16px 44px;
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all var(--transition-base);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
            text-decoration: none;
        }
        .btn-cta-primary:hover {
            box-shadow: 0 0 40px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-cta-secondary {
            display: inline-block;
            padding: 16px 44px;
            font-size: 18px;
            font-weight: 600;
            color: var(--color-accent);
            background: transparent;
            border: 1.5px solid var(--color-accent);
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.1);
        }
        .btn-cta-secondary:hover {
            background: rgba(0, 229, 255, 0.1);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
            color: var(--color-accent);
            transform: translateY(-2px);
        }
        .hero-meta-strip {
            margin-top: 40px;
            font-size: 14px;
            color: var(--color-text-secondary);
            letter-spacing: 1px;
        }
        .hero-meta-strip i {
            color: var(--color-accent);
            margin-right: 6px;
        }

        /* ===== Sections ===== */
        .section-block {
            padding: 80px 0;
            background: var(--color-bg);
        }
        .section-block-alt {
            background: var(--color-bg-section);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text-title);
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            transition: all var(--transition-base);
            height: 100%;
        }
        .glass-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card), 0 0 30px rgba(0, 229, 255, 0.15);
            transform: translateY(-4px);
        }
        .glass-card .card-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--color-accent);
            margin-bottom: 18px;
            transition: all var(--transition-base);
        }
        .glass-card:hover .card-icon {
            transform: scale(1.1);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
        }
        .glass-card .card-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-text-title);
            margin-bottom: 10px;
        }
        .glass-card .card-desc {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* ===== Feature Cards (asymmetric) ===== */
        .feature-grid .glass-card.feature-highlight {
            background: rgba(255, 255, 255, 0.09);
            border-color: rgba(0, 229, 255, 0.25);
        }
        .feature-grid .glass-card.feature-highlight:hover {
            border-color: var(--color-accent);
        }

        /* ===== Showcase ===== */
        .showcase-section {
            padding: 80px 0;
            background: var(--color-bg-section);
        }
        .showcase-wrapper {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .showcase-text {
            flex: 0 0 45%;
        }
        .showcase-text h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 18px;
        }
        .showcase-text p {
            font-size: 16px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .showcase-image {
            flex: 0 0 55%;
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
        }
        .showcase-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .showcase-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), transparent 60%);
            pointer-events: none;
        }

        /* ===== Social Proof ===== */
        .social-proof {
            padding: 80px 0;
            background: var(--color-bg);
            position: relative;
        }
        .social-proof::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .social-proof .container {
            position: relative;
            z-index: 1;
        }
        .review-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            height: 100%;
            transition: all var(--transition-base);
        }
        .review-card:hover {
            border-color: var(--color-accent);
            box-shadow: 0 0 25px rgba(0, 229, 255, 0.1);
        }
        .review-card .avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.15);
            margin: 0 auto 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--color-accent);
            border: 2px solid rgba(0, 229, 255, 0.2);
        }
        .review-card .review-text {
            font-size: 14px;
            color: var(--color-text);
            font-style: italic;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .review-card .review-author {
            font-size: 13px;
            color: var(--color-text-secondary);
            font-weight: 500;
        }
        .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-text-title);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-top: 4px;
        }

        /* ===== News / CMS ===== */
        .news-section {
            padding: 80px 0;
            background: var(--color-bg-section);
        }
        .news-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px;
            height: 100%;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--color-accent);
            box-shadow: 0 0 25px rgba(0, 229, 255, 0.1);
            transform: translateY(-3px);
        }
        .news-card .badge-tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 500;
            color: #fff;
            background: var(--color-primary);
            border-radius: 20px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .news-card .news-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text-title);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-card .news-title a {
            color: var(--color-text-title);
            transition: color var(--transition-base);
        }
        .news-card .news-title a:hover {
            color: var(--color-accent);
        }
        .news-card .news-summary {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-text-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 14px;
        }
        .news-card .news-meta .news-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .news-card .news-meta .news-date i {
            color: var(--color-accent);
            font-size: 12px;
        }
        .news-card .read-more {
            color: var(--color-accent);
            font-weight: 500;
            transition: all var(--transition-base);
        }
        .news-card .read-more:hover {
            text-shadow: 0 0 10px var(--color-accent-glow);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--color-bg);
        }
        .faq-accordion .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--color-text-title);
            font-size: 16px;
            font-weight: 500;
            padding: 18px 0;
            box-shadow: none;
            border: none;
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E5FF'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: transform var(--transition-base);
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(-180deg);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--color-accent);
        }
        .faq-accordion .accordion-body {
            padding: 4px 0 18px;
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ===== CTA Strip ===== */
        .cta-strip-fixed {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1060;
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid rgba(0, 229, 255, 0.15);
            padding: 12px 0;
            height: 80px;
            display: flex;
            align-items: center;
        }
        .cta-strip-fixed .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .cta-strip-fixed .strip-text {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text-title);
        }
        .cta-strip-fixed .strip-text i {
            color: var(--color-accent);
            margin-right: 8px;
        }
        .cta-strip-fixed .strip-btn {
            display: inline-block;
            padding: 12px 36px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border: none;
            border-radius: var(--radius-btn);
            text-decoration: none;
            transition: all var(--transition-base);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
        }
        .cta-strip-fixed .strip-btn:hover {
            box-shadow: 0 0 35px rgba(0, 229, 255, 0.45);
            transform: translateY(-1px);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-nav);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 40px 0 100px;
        }
        .site-footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .site-footer .footer-copy {
            font-size: 14px;
            color: var(--color-text-secondary);
        }
        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer .footer-links a {
            font-size: 14px;
            color: var(--color-text-secondary);
            transition: color var(--transition-base);
        }
        .site-footer .footer-links a:hover {
            color: var(--color-accent);
        }
        .site-footer .footer-social {
            display: flex;
            gap: 12px;
        }
        .site-footer .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(--color-text-secondary);
            font-size: 18px;
            transition: all var(--transition-base);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-social a:hover {
            color: var(--color-accent);
            border-color: var(--color-accent);
            background: rgba(0, 229, 255, 0.1);
            box-shadow: 0 0 15px rgba(0, 229, 255, 0.15);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-content h1 {
                font-size: 44px;
            }
            .showcase-wrapper {
                flex-direction: column;
            }
            .showcase-text {
                flex: 0 0 100%;
                text-align: center;
            }
            .showcase-image {
                flex: 0 0 100%;
                width: 100%;
            }
            .section-title {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }
            .site-logo {
                font-size: 20px;
            }
            .site-logo i {
                font-size: 22px;
            }
            .nav-list .nav-link {
                padding: 6px 12px;
                font-size: 14px;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .hero-content .hero-sub {
                font-size: 16px;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                padding: 14px 32px;
                font-size: 16px;
            }
            .section-block {
                padding: 50px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 32px;
            }
            .glass-card {
                padding: 20px 18px;
            }
            .showcase-section {
                padding: 50px 0;
            }
            .showcase-text h2 {
                font-size: 24px;
            }
            .social-proof {
                padding: 50px 0;
            }
            .stat-number {
                font-size: 28px;
            }
            .news-section {
                padding: 50px 0;
            }
            .faq-section {
                padding: 50px 0;
            }
            .cta-strip-fixed {
                height: 60px;
                padding: 8px 0;
            }
            .cta-strip-fixed .strip-text {
                font-size: 15px;
            }
            .cta-strip-fixed .strip-btn {
                padding: 10px 24px;
                font-size: 14px;
            }
            .site-footer {
                padding: 30px 0 80px;
            }
            .site-footer .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-links {
                justify-content: center;
            }
            .site-footer .footer-social {
                justify-content: center;
            }
            .navbar-collapse {
                background: var(--color-bg-nav);
                border-radius: 0 0 var(--radius-card) var(--radius-card);
                padding: 16px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
                border: 1px solid rgba(255, 255, 255, 0.05);
            }
            .navbar-collapse .nav-list {
                flex-direction: column;
                width: 100%;
                gap: 4px;
            }
            .navbar-collapse .nav-list .nav-link {
                padding: 12px 16px;
                width: 100%;
            }
            .navbar-collapse .nav-list .nav-link.active::after {
                display: none;
            }
            .navbar-collapse .nav-list .nav-link.active {
                background: rgba(0, 229, 255, 0.12);
                border-radius: var(--radius-sm);
            }
            .navbar-collapse .nav-cta {
                margin-top: 8px;
                text-align: center;
            }
            .feature-grid .col-md-4 {
                margin-bottom: 20px;
            }
            .review-card {
                margin-bottom: 20px;
            }
            .news-card {
                margin-bottom: 20px;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 26px;
            }
            .hero-content .hero-sub {
                font-size: 14px;
            }
            .hero-btn-group {
                flex-direction: column;
                gap: 12px;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                text-align: center;
                padding: 14px 20px;
                font-size: 15px;
            }
            .section-title {
                font-size: 20px;
            }
            .glass-card .card-title {
                font-size: 18px;
            }
            .cta-strip-fixed .strip-text {
                font-size: 13px;
            }
            .cta-strip-fixed .strip-btn {
                padding: 8px 18px;
                font-size: 13px;
            }
            .stat-number {
                font-size: 24px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 229, 255, 0.25);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 229, 255, 0.4);
        }

        /* ===== Utility ===== */
        .mb-section {
            margin-bottom: 80px;
        }
        @media (max-width: 768px) {
            .mb-section {
                margin-bottom: 50px;
            }
        }
        .text-accent {
            color: var(--color-accent);
        }
        .bg-glass {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
        }
        .news-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--color-text-secondary);
            font-size: 16px;
        }
        .news-empty i {
            font-size: 40px;
            color: var(--color-text-secondary);
            opacity: 0.3;
            margin-bottom: 16px;
            display: block;
        }

/* roulang page: article */
:root {
            --color-primary: #0A4B7A;
            --color-primary-mix: #0A5C8A;
            --color-accent: #00E5FF;
            --color-bg: #0B0F1A;
            --color-bg-card: #121826;
            --color-bg-nav: #0B0F1A;
            --color-text: #E0E6F0;
            --color-text-secondary: #8892B0;
            --color-text-heading: #FFFFFF;
            --color-border: rgba(255,255,255,0.1);
            --radius-card: 16px;
            --radius-small: 8px;
            --radius-btn: 24px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
            --shadow-glow: 0 0 20px rgba(0,229,255,0.3);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Roboto', sans-serif;
            --spacing-section: 80px;
            --max-width: 1200px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--color-accent); text-decoration: none; transition: color 0.3s; }
        a:hover { color: #66f0ff; }
        img { max-width: 100%; height: auto; border-radius: var(--radius-card); }
        .container { max-width: var(--max-width); padding-left: 20px; padding-right: 20px; margin: 0 auto; }
        .container-narrow { max-width: 900px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }

        /* Header & Navigation */
        .site-header {
            background: var(--color-bg-nav);
            border-bottom: 1px solid rgba(255,255,255,0.05);
            position: sticky;
            top: 0;
            z-index: 1050;
            height: 72px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-text-heading);
            font-size: 24px;
            font-weight: 700;
            text-decoration: none;
            white-space: nowrap;
        }
        .site-logo i { color: var(--color-accent); font-size: 28px; }
        .site-logo:hover { color: var(--color-accent); }
        .navbar { flex: 1; display: flex; justify-content: flex-end; }
        .nav-list {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 8px;
            margin: 0;
            padding: 0;
        }
        .nav-list .nav-item { margin: 0; }
        .nav-list .nav-link {
            color: var(--color-text);
            font-size: 15px;
            padding: 8px 16px;
            border-radius: var(--radius-small);
            transition: all 0.3s;
            position: relative;
            white-space: nowrap;
        }
        .nav-list .nav-link:hover,
        .nav-list .nav-link.active {
            color: var(--color-accent);
            background: rgba(0,229,255,0.08);
        }
        .nav-list .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--color-accent);
            box-shadow: 0 0 8px var(--color-accent);
        }
        .nav-list .nav-link.nav-cta {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 8px 24px;
            font-weight: 600;
            margin-left: 8px;
        }
        .nav-list .nav-link.nav-cta:hover {
            box-shadow: 0 0 30px rgba(0,229,255,0.5);
            transform: translateY(-1px);
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            padding: 8px;
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .navbar-toggler:focus { outline: 2px solid var(--color-accent); outline-offset: 2px; }
        .toggler-icon {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: all 0.3s;
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 24px 0 8px;
            background: transparent;
        }
        .breadcrumb-wrap .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-wrap .breadcrumb-item { font-size: 14px; color: var(--color-text-secondary); }
        .breadcrumb-wrap .breadcrumb-item a { color: var(--color-accent); }
        .breadcrumb-wrap .breadcrumb-item.active { color: var(--color-text); }
        .breadcrumb-item + .breadcrumb-item::before { color: var(--color-text-secondary); }

        /* Article Header */
        .article-header {
            padding: 32px 0 24px;
            border-bottom: 1px solid var(--color-border);
            margin-bottom: 32px;
        }
        .article-header h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            font-size: 14px;
            color: var(--color-text-secondary);
        }
        .article-meta i { margin-right: 6px; color: var(--color-accent); }
        .article-meta .category-badge {
            background: var(--color-primary);
            color: #fff;
            padding: 2px 12px;
            border-radius: 4px;
            font-size: 13px;
        }

        /* Article Body */
        .article-body {
            font-size: 18px;
            line-height: 1.8;
            color: var(--color-text);
            padding-bottom: 40px;
        }
        .article-body p { margin-bottom: 1.8em; }
        .article-body h2, .article-body h3 {
            color: var(--color-text-heading);
            margin-top: 1.5em;
            margin-bottom: 0.6em;
        }
        .article-body h2 { font-size: 28px; }
        .article-body h3 { font-size: 22px; }
        .article-body blockquote {
            border-left: 4px solid var(--color-accent);
            background: rgba(255,255,255,0.04);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-small) var(--radius-small) 0;
            color: var(--color-text-secondary);
        }
        .article-body img {
            display: block;
            margin: 32px auto;
            border-radius: 12px;
            max-width: 100%;
        }
        .article-body a {
            color: var(--color-accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover { color: #66f0ff; }
        .article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 1.8em; }
        .article-body li { margin-bottom: 0.5em; }

        /* Related Section */
        .related-section {
            padding: 48px 0 24px;
            border-top: 1px solid var(--color-border);
            margin-top: 16px;
        }
        .related-section h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 24px;
        }
        .related-card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            transition: all 0.4s;
            height: 100%;
        }
        .related-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .related-card .badge {
            background: var(--color-primary);
            color: #fff;
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 10px;
            display: inline-block;
        }
        .related-card h3 { font-size: 16px; font-weight: 600; color: var(--color-text-heading); margin-bottom: 8px; }
        .related-card h3 a { color: var(--color-text-heading); }
        .related-card h3 a:hover { color: var(--color-accent); }
        .related-card .time { font-size: 12px; color: var(--color-text-secondary); }

        /* Not Found */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-box i { font-size: 48px; color: var(--color-text-secondary); margin-bottom: 20px; display: block; }
        .not-found-box h2 { font-size: 28px; color: var(--color-text-heading); margin-bottom: 16px; }
        .not-found-box p { color: var(--color-text-secondary); margin-bottom: 24px; }
        .not-found-box .btn-home {
            display: inline-block;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all 0.3s;
        }
        .not-found-box .btn-home:hover { box-shadow: 0 0 30px rgba(0,229,255,0.5); transform: translateY(-2px); color: #fff; }

        /* Back to Home */
        .back-home-wrap {
            text-align: center;
            padding: 40px 0 60px;
        }
        .back-home-wrap .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--color-accent);
            color: var(--color-accent);
            padding: 10px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all 0.3s;
        }
        .back-home-wrap .btn-back:hover {
            background: rgba(0,229,255,0.1);
            box-shadow: 0 0 20px rgba(0,229,255,0.3);
            color: var(--color-accent);
        }

        /* Footer */
        .site-footer {
            background: #0B0F1A;
            border-top: 1px solid rgba(255,255,255,0.05);
            padding: 40px 0 30px;
            margin-top: 60px;
        }
        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
            text-align: center;
        }
        .footer-copy {
            font-size: 14px;
            color: var(--color-text-secondary);
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px 24px;
            padding: 0;
            margin: 0;
        }
        .footer-links li a {
            color: var(--color-text-secondary);
            font-size: 14px;
            transition: color 0.3s;
        }
        .footer-links li a:hover { color: var(--color-accent); }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .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(--color-text-secondary);
            font-size: 18px;
            transition: all 0.3s;
            border: 1px solid transparent;
        }
        .footer-social a:hover {
            background: rgba(0,229,255,0.12);
            color: var(--color-accent);
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }

        /* Responsive */
        @media (max-width: 992px) {
            :root { --spacing-section: 50px; }
            .article-header h1 { font-size: 28px; }
            .article-body { font-size: 16px; }
            .nav-list .nav-link { padding: 6px 12px; font-size: 14px; }
        }
        @media (max-width: 768px) {
            .site-header { height: 64px; }
            .navbar-toggler { display: flex; }
            .navbar-collapse {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--color-bg-nav);
                border-bottom: 1px solid var(--color-border);
                padding: 12px 20px;
                z-index: 1040;
            }
            .nav-list {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                width: 100%;
            }
            .nav-list .nav-link {
                padding: 10px 16px;
                border-radius: var(--radius-small);
            }
            .nav-list .nav-link.nav-cta {
                margin-left: 0;
                text-align: center;
                margin-top: 8px;
            }
            .nav-list .nav-link.active::after { display: none; }
            .article-header h1 { font-size: 24px; }
            .article-meta { gap: 12px; font-size: 13px; }
            .related-section .row > div { margin-bottom: 16px; }
            .footer-links { gap: 12px 16px; }
        }
        @media (max-width: 520px) {
            .container { padding-left: 14px; padding-right: 14px; }
            .container-narrow { padding-left: 14px; padding-right: 14px; }
            .article-header h1 { font-size: 20px; }
            .article-body { font-size: 15px; }
            .site-logo { font-size: 20px; }
            .site-logo i { font-size: 22px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0A4B7A;
            --color-primary-deep: #083a5e;
            --color-accent: #00E5FF;
            --color-accent-glow: rgba(0, 229, 255, 0.35);
            --color-bg: #0B0F1A;
            --color-bg-card: #121826;
            --color-bg-nav: #0B0F1A;
            --color-bg-section: #121826;
            --color-text: #E0E6F0;
            --color-text-secondary: #8892B0;
            --color-text-heading: #FFFFFF;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-light: rgba(255, 255, 255, 0.12);
            --radius-card: 16px;
            --radius-btn: 24px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
            --transition: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Roboto', system-ui, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-family);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #fff;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            padding-left: 0;
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--color-text-heading);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            padding-left: 15px;
            padding-right: 15px;
            margin: 0 auto;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .site-logo i {
            color: var(--color-accent);
            font-size: 28px;
            filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.4));
        }
        .site-logo span {
            background: linear-gradient(135deg, #fff, var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            color: #fff;
        }
        .navbar {
            padding: 0;
            flex: 1;
            display: flex;
            justify-content: flex-end;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .nav-item {
            margin: 0;
        }
        .nav-link {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: width var(--transition);
            box-shadow: 0 0 10px var(--color-accent-glow);
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link:hover::after {
            width: 60%;
        }
        .nav-link.active {
            color: #fff;
        }
        .nav-link.active::after {
            width: 70%;
        }
        .nav-link.nav-cta {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            padding: 8px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.2);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .nav-link.nav-cta::after {
            display: none;
        }
        .nav-link.nav-cta:hover {
            box-shadow: 0 0 30px var(--color-accent-glow);
            transform: translateY(-1px);
            color: #fff;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            padding: 6px 10px;
            cursor: pointer;
            display: none;
            flex-direction: column;
            gap: 5px;
        }
        .toggler-icon {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: all var(--transition);
        }

        /* ===== Hero 分类横幅 ===== */
        .category-hero {
            padding: 140px 0 80px;
            background: var(--color-bg-card);
            position: relative;
            overflow: hidden;
            min-height: 50vh;
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(10, 75, 122, 0.5), transparent 70%),
                radial-gradient(ellipse at 70% 50%, rgba(0, 229, 255, 0.12), transparent 70%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 800;
            margin-bottom: 16px;
            text-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
        }
        .category-hero h1 i {
            color: var(--color-accent);
            margin-right: 10px;
        }
        .category-hero p {
            font-size: 18px;
            color: var(--color-text-secondary);
            max-width: 700px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .category-hero .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(0, 229, 255, 0.12);
            border: 1px solid rgba(0, 229, 255, 0.2);
            border-radius: var(--radius-btn);
            color: var(--color-accent);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .section-title p {
            color: var(--color-text-secondary);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .title-accent {
            display: inline-block;
            width: 50px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px;
            margin-top: 12px;
            box-shadow: 0 0 12px var(--color-accent-glow);
        }

        /* ===== 玻璃卡片 ===== */
        .glass-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            height: 100%;
        }
        .glass-card:hover {
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 20px rgba(0, 229, 255, 0.12);
            transform: translateY(-4px);
        }
        .glass-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--color-accent);
            margin-bottom: 18px;
            transition: all var(--transition);
        }
        .glass-card:hover .icon-wrap {
            background: rgba(0, 229, 255, 0.22);
            transform: scale(1.06);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.2);
        }
        .glass-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .glass-card p {
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 按钮 ===== */
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            font-size: 17px;
            transition: box-shadow var(--transition), transform var(--transition);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.18);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary-custom:hover {
            box-shadow: 0 0 36px var(--color-accent-glow);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-secondary-custom {
            background: transparent;
            border: 1px solid var(--color-accent);
            color: var(--color-accent);
            font-weight: 600;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary-custom:hover {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            border-color: transparent;
            box-shadow: 0 0 24px var(--color-accent-glow);
        }

        /* ===== 特色卖点三连 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-grid .glass-card:nth-child(2) {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== 场景展示 ===== */
        .scene-section {
            background: var(--color-bg-section);
        }
        .scene-wrap {
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .scene-text {
            flex: 0 0 42%;
        }
        .scene-text h2 {
            font-size: 32px;
            margin-bottom: 16px;
        }
        .scene-text p {
            color: var(--color-text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .scene-image {
            flex: 1;
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .scene-image img {
            width: 100%;
            display: block;
            border-radius: var(--radius-card);
        }
        .scene-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.25);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: var(--color-bg-card);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            z-index: 0;
        }
        .stats-section .container {
            position: relative;
            z-index: 1;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            transition: all var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(0, 229, 255, 0.2);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.08);
        }
        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
            margin-bottom: 4px;
            text-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
        }
        .stat-label {
            font-size: 15px;
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        /* ===== 平台支持 ===== */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .platform-item {
            text-align: center;
            padding: 28px 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            transition: all var(--transition);
        }
        .platform-item:hover {
            border-color: rgba(0, 229, 255, 0.25);
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        }
        .platform-item i {
            font-size: 36px;
            color: var(--color-accent);
            margin-bottom: 12px;
            display: block;
        }
        .platform-item h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .platform-item p {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-bg-section);
        }
        .faq-accordion .accordion-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--color-text-heading);
            font-size: 16px;
            font-weight: 600;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E5FF'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: transform var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(-180deg);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 229, 255, 0.06);
            color: var(--color-accent);
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 18px;
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(0, 229, 255, 0.2);
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: var(--color-bg-card);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--color-text-secondary);
            font-size: 18px;
            max-width: 600px;
            margin: 0 auto 32px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-bg-nav);
            padding: 40px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .footer-copy {
            color: var(--color-text-secondary);
            font-size: 14px;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .footer-links li a {
            color: var(--color-text-secondary);
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-links li a:hover {
            color: var(--color-accent);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            color: var(--color-text-secondary);
            font-size: 20px;
            transition: color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            color: var(--color-accent);
            transform: translateY(-2px);
        }

        /* ===== 固定底部条 ===== */
        .sticky-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            z-index: 1040;
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 0;
            display: none;
        }
        .sticky-bottom-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .sticky-bottom-bar .bar-text {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
        }
        .sticky-bottom-bar .bar-text i {
            color: var(--color-accent);
            margin-right: 8px;
        }
        .sticky-bottom-bar .btn-primary-custom {
            padding: 10px 28px;
            font-size: 15px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .platform-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-wrap {
                flex-direction: column;
                gap: 32px;
            }
            .scene-text {
                flex: 1;
            }
            .category-hero h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            .navbar-toggler {
                display: flex;
            }
            .navbar-collapse {
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(11, 15, 26, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                padding: 16px 20px;
            }
            .nav-list {
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-link.nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 32px;
            }
            .platform-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .category-hero {
                padding: 110px 0 60px;
                min-height: 40vh;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .section-title h2 {
                font-size: 26px;
            }
            .section-padding {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
            .footer-social {
                justify-content: center;
            }
            .sticky-bottom-bar {
                display: block;
            }
            body {
                padding-bottom: 68px;
            }
            .sticky-bottom-bar .bar-text {
                font-size: 14px;
            }
            .sticky-bottom-bar .btn-primary-custom {
                padding: 8px 20px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-number {
                font-size: 28px;
            }
            .platform-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .platform-item {
                padding: 20px 12px;
            }
            .platform-item i {
                font-size: 28px;
            }
            .btn-primary-custom {
                padding: 12px 28px;
                font-size: 15px;
            }
            .section-title h2 {
                font-size: 22px;
            }
            .scene-text h2 {
                font-size: 22px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .glass-card {
                padding: 20px 16px;
            }
        }

        /* ===== 工具类 ===== */
        .text-accent {
            color: var(--color-accent);
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .fw-600 {
            font-weight: 600;
        }

/* roulang page: category2 */
:root {
            --color-primary: #0A4B7A;
            --color-primary-deep: #083b61;
            --color-accent: #00E5FF;
            --color-accent-glow: rgba(0, 229, 255, 0.3);
            --color-bg-dark: #0B0F1A;
            --color-bg-card: #121826;
            --color-bg-nav: #0B0F1A;
            --color-bg-section: #121826;
            --color-text-main: #E0E6F0;
            --color-text-secondary: #8892B0;
            --color-text-title: #FFFFFF;
            --color-border: rgba(255, 255, 255, 0.1);
            --color-border-glow: rgba(0, 229, 255, 0.25);
            --radius-card: 16px;
            --radius-btn: 24px;
            --radius-badge: 4px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.3);
            --font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition-base: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--color-bg-dark);
            color: var(--color-text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-base);
        }
        a:hover {
            color: #66f0ff;
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 15px;
            padding-right: 15px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--color-bg-nav);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            height: 72px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1040;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text-title) !important;
            text-decoration: none;
            letter-spacing: 0.5px;
        }
        .site-logo i {
            color: var(--color-accent);
            font-size: 28px;
            filter: drop-shadow(0 0 8px var(--color-accent-glow));
        }
        .site-logo span {
            background: linear-gradient(135deg, #fff, var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-item .nav-link {
            color: var(--color-text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 8px;
            transition: all var(--transition-base);
            position: relative;
            text-decoration: none;
        }
        .nav-item .nav-link:hover {
            color: var(--color-text-title);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-item .nav-link.active {
            color: var(--color-text-title);
            background: rgba(0, 229, 255, 0.08);
        }
        .nav-item .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--color-accent-glow);
        }
        .nav-item .nav-link.nav-cta {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            padding: 8px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
            margin-left: 8px;
        }
        .nav-item .nav-link.nav-cta:hover {
            box-shadow: 0 0 30px var(--color-accent-glow);
            transform: translateY(-1px);
        }
        .nav-item .nav-link.nav-cta.active::after {
            display: none;
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            padding: 6px 10px;
            display: flex;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .navbar-toggler:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .toggler-icon {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transition: all 0.3s;
        }

        /* ===== Hero (分类页 40vh) ===== */
        .category-hero {
            min-height: 40vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, #0B0F1A 0%, #0A1A2E 50%, #0B0F1A 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero h1 {
            font-size: 52px;
            font-weight: 700;
            color: var(--color-text-title);
            text-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .category-hero h1 i {
            color: var(--color-accent);
            margin-right: 12px;
        }
        .category-hero p {
            font-size: 18px;
            color: var(--color-text-secondary);
            max-width: 640px;
            margin: 0 auto 24px;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(0, 229, 255, 0.12);
            border: 1px solid rgba(0, 229, 255, 0.2);
            color: var(--color-accent);
            padding: 6px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(8px);
        }
        .category-hero .hero-countdown {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(12px);
            padding: 10px 28px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 8px;
        }
        .category-hero .hero-countdown i {
            color: var(--color-accent);
            font-size: 18px;
        }
        .category-hero .hero-countdown .cd-item {
            text-align: center;
            min-width: 48px;
        }
        .category-hero .hero-countdown .cd-item .num {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text-title);
            line-height: 1.2;
        }
        .category-hero .hero-countdown .cd-item .label {
            font-size: 11px;
            color: var(--color-text-secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .category-hero .hero-countdown .cd-sep {
            color: var(--color-accent);
            font-size: 22px;
            font-weight: 300;
            opacity: 0.5;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block-alt {
            background: var(--color-bg-section);
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto 48px;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
            border-radius: 4px;
            margin: 0 auto 16px;
        }

        /* ===== 玻璃卡片 ===== */
        .glass-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 24px;
            transition: all var(--transition-base);
            height: 100%;
        }
        .glass-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 229, 255, 0.10);
            transform: translateY(-4px);
        }
        .glass-card .card-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            transition: all var(--transition-base);
        }
        .glass-card .card-icon i {
            font-size: 26px;
            color: var(--color-accent);
            transition: all var(--transition-base);
        }
        .glass-card:hover .card-icon {
            background: rgba(0, 229, 255, 0.20);
            transform: scale(1.05);
        }
        .glass-card:hover .card-icon i {
            transform: scale(1.1);
            filter: drop-shadow(0 0 8px var(--color-accent-glow));
        }
        .glass-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 10px;
        }
        .glass-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== 特色卡片（带图片） ===== */
        .feature-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition-base);
            height: 100%;
        }
        .feature-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 229, 255, 0.08);
            transform: translateY(-3px);
        }
        .feature-card .fc-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .feature-card .fc-body {
            padding: 24px;
        }
        .feature-card .fc-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 8px;
        }
        .feature-card .fc-body p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .feature-card .fc-tag {
            display: inline-block;
            background: var(--color-primary);
            color: #fff;
            padding: 2px 12px;
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 12px;
        }

        /* ===== 按钮 ===== */
        .btn-cta-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            font-size: 18px;
            transition: all var(--transition-base);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .btn-cta-primary:hover {
            box-shadow: 0 0 36px var(--color-accent-glow);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-cta-secondary {
            background: transparent;
            border: 1px solid var(--color-accent);
            color: var(--color-accent);
            font-weight: 600;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }
        .btn-cta-secondary:hover {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border-color: transparent;
            color: #fff;
            box-shadow: 0 0 24px var(--color-accent-glow);
        }

        /* ===== 场景板块（图文） ===== */
        .scene-block {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        .scene-block .scene-text {
            flex: 0 0 42%;
        }
        .scene-block .scene-text h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 16px;
        }
        .scene-block .scene-text p {
            font-size: 16px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .scene-block .scene-img {
            flex: 0 0 55%;
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .scene-block .scene-img img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }
        .scene-block .scene-img::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-card);
            border: 1px solid rgba(0, 229, 255, 0.08);
            pointer-events: none;
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 0 !important;
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--color-text-title);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 0;
            box-shadow: none;
            border: none;
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E5FF'%3E%3Cpath d='M8 4a.5.5 0 0 1 .5.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3A.5.5 0 0 1 8 4z'/%3E%3C/svg%3E");
            transition: transform 0.3s;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--color-accent);
        }
        .faq-accordion .accordion-body {
            padding: 0 0 20px 0;
            color: var(--color-text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-accordion .accordion-body a {
            color: var(--color-accent);
            text-decoration: underline;
        }

        /* ===== CTA 板块 ===== */
        .cta-block {
            background: linear-gradient(135deg, rgba(10, 75, 122, 0.25), rgba(0, 229, 255, 0.06));
            border: 1px solid rgba(0, 229, 255, 0.10);
            border-radius: var(--radius-card);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.04), transparent 70%);
            pointer-events: none;
        }
        .cta-block h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text-title);
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 520px;
            margin: 0 auto 32px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-bg-nav);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 32px 0;
            margin-top: 0;
        }
        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px 24px;
        }
        .footer-copy {
            color: var(--color-text-secondary);
            font-size: 14px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            margin: 0;
            padding: 0;
        }
        .footer-links li a {
            color: var(--color-text-secondary);
            font-size: 14px;
            transition: color var(--transition-base);
            text-decoration: none;
        }
        .footer-links li a:hover {
            color: var(--color-accent);
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            color: var(--color-text-secondary);
            font-size: 20px;
            transition: all var(--transition-base);
        }
        .footer-social a:hover {
            color: var(--color-accent);
            transform: scale(1.1);
        }

        /* ===== 底部固定转化条 ===== */
        .sticky-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 14px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 80px;
        }
        .sticky-cta .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .sticky-cta .sticky-text {
            color: var(--color-text-title);
            font-size: 18px;
            font-weight: 600;
        }
        .sticky-cta .sticky-text i {
            color: var(--color-accent);
            margin-right: 8px;
        }
        .sticky-cta .btn-sticky {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 10px 32px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            transition: all var(--transition-base);
            text-decoration: none;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
        }
        .sticky-cta .btn-sticky:hover {
            box-shadow: 0 0 30px var(--color-accent-glow);
            transform: translateY(-1px);
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .scene-block {
                flex-direction: column;
                gap: 32px;
            }
            .scene-block .scene-text,
            .scene-block .scene-img {
                flex: 0 0 100%;
            }
            .category-hero h1 {
                font-size: 38px;
            }
            .section-title {
                font-size: 28px;
            }
            .cta-block h2 {
                font-size: 26px;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
            .footer-social {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }
            .site-logo {
                font-size: 20px;
            }
            .site-logo i {
                font-size: 22px;
            }
            .nav-list {
                background: var(--color-bg-dark);
                padding: 12px 0;
                border-radius: 0 0 var(--radius-card) var(--radius-card);
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
            }
            .nav-item .nav-link {
                padding: 10px 20px;
                font-size: 15px;
            }
            .nav-item .nav-link.nav-cta {
                margin: 8px 20px 4px;
                text-align: center;
            }
            .category-hero {
                min-height: 32vh;
                padding: 40px 0;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .category-hero .hero-countdown {
                flex-wrap: wrap;
                justify-content: center;
                padding: 10px 18px;
            }
            .category-hero .hero-countdown .cd-item .num {
                font-size: 20px;
            }
            .category-hero .hero-countdown .cd-sep {
                font-size: 16px;
            }
            .section-block {
                padding: 50px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 32px;
            }
            .glass-card {
                padding: 24px 18px;
            }
            .glass-card h3 {
                font-size: 18px;
            }
            .scene-block .scene-text h2 {
                font-size: 24px;
            }
            .feature-card .fc-img {
                height: 160px;
            }
            .cta-block {
                padding: 40px 20px;
            }
            .cta-block h2 {
                font-size: 22px;
            }
            .btn-cta-primary {
                padding: 12px 28px;
                font-size: 16px;
            }
            .sticky-cta {
                height: 60px;
                padding: 10px 0;
            }
            .sticky-cta .sticky-text {
                font-size: 14px;
            }
            .sticky-cta .sticky-text i {
                font-size: 14px;
            }
            .sticky-cta .btn-sticky {
                padding: 8px 20px;
                font-size: 14px;
            }
            .footer-copy {
                font-size: 13px;
            }
            .footer-links li a {
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero .hero-badge {
                font-size: 12px;
                padding: 4px 14px;
            }
            .category-hero .hero-countdown .cd-item {
                min-width: 36px;
            }
            .category-hero .hero-countdown .cd-item .num {
                font-size: 16px;
            }
            .category-hero .hero-countdown .cd-item .label {
                font-size: 9px;
            }
            .section-title {
                font-size: 20px;
            }
            .glass-card {
                padding: 18px 14px;
            }
            .glass-card .card-icon {
                width: 48px;
                height: 48px;
            }
            .glass-card .card-icon i {
                font-size: 20px;
            }
            .glass-card h3 {
                font-size: 16px;
            }
            .feature-card .fc-body {
                padding: 16px;
            }
            .feature-card .fc-body h3 {
                font-size: 16px;
            }
            .cta-block h2 {
                font-size: 18px;
            }
            .btn-cta-primary {
                padding: 10px 22px;
                font-size: 14px;
            }
            .sticky-cta .sticky-text {
                font-size: 12px;
            }
            .sticky-cta .btn-sticky {
                padding: 6px 16px;
                font-size: 12px;
            }
        }