/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --neon-cyan: #00d4ff;
            --neon-pink: #ff2d95;
            --neon-purple: #7c3aed;
            --neon-glow-cyan: rgba(0, 212, 255, 0.35);
            --neon-glow-pink: rgba(255, 45, 149, 0.30);
            --dark-bg: #0a0a1a;
            --dark-bg2: #0f0f24;
            --dark-bg3: #151530;
            --dark-card: #1a1a3e;
            --dark-border: #2a2a5a;
            --text-primary: #f0f0ff;
            --text-secondary: #b0b0d0;
            --text-muted: #7a7a9a;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow-cyan: 0 0 20px rgba(0, 212, 255, 0.25);
            --shadow-glow-pink: 0 0 20px rgba(255, 45, 149, 0.20);
            --transition: all 0.3s ease;
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--dark-bg);
            color: var(--text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--neon-cyan);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--neon-pink);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ::selection {
            background: var(--neon-cyan);
            color: #000;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            padding: 0 24px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: rgba(10, 10, 26, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--dark-border);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
            padding: 0;
            min-height: 70px;
            transition: var(--transition);
        }
        .navbar-custom .navbar-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            padding: 12px 0;
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            position: relative;
        }
        .navbar-custom .navbar-brand:hover {
            background: linear-gradient(135deg, var(--neon-pink), var(--neon-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-custom .navbar-nav {
            gap: 4px;
        }
        .navbar-custom .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            padding: 22px 18px !important;
            font-size: 0.95rem;
            letter-spacing: 0.3px;
            position: relative;
            transition: var(--transition);
            border-bottom: 2px solid transparent;
        }
        .navbar-custom .nav-link:hover {
            color: var(--neon-cyan) !important;
            border-bottom-color: var(--neon-cyan);
            text-shadow: 0 0 12px var(--neon-glow-cyan);
        }
        .navbar-custom .nav-link.active {
            color: #fff !important;
            border-bottom-color: var(--neon-pink);
            text-shadow: 0 0 14px var(--neon-glow-pink);
        }
        .navbar-custom .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--neon-pink);
            box-shadow: 0 0 16px var(--neon-glow-pink);
        }
        .navbar-custom .nav-cta {
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
            color: #fff !important;
            border-radius: 50px;
            padding: 10px 28px !important;
            margin: 14px 0 14px 16px;
            font-weight: 600;
            border: none;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
            transition: var(--transition);
        }
        .navbar-custom .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(0, 212, 255, 0.45);
            color: #fff !important;
            border-bottom-color: transparent !important;
        }
        .navbar-custom .navbar-toggler {
            border: 1px solid var(--dark-border);
            padding: 8px 12px;
            color: var(--text-secondary);
            background: transparent;
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--neon-cyan);
        }
        .navbar-custom .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(176,176,208,1)' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
        }
        @media (max-width: 991px) {
            .navbar-custom {
                min-height: 60px;
            }
            .navbar-custom .navbar-nav {
                padding: 16px 0;
                gap: 0;
            }
            .navbar-custom .nav-link {
                padding: 12px 16px !important;
                border-bottom: 1px solid rgba(42, 42, 90, 0.3);
            }
            .navbar-custom .nav-link.active::after {
                display: none;
            }
            .navbar-custom .nav-link.active {
                background: rgba(0, 212, 255, 0.08);
                border-left: 3px solid var(--neon-cyan);
            }
            .navbar-custom .nav-cta {
                margin: 12px 16px;
                text-align: center;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 10, 26, 0.88) 0%, rgba(15, 15, 36, 0.78) 50%, rgba(10, 10, 26, 0.92) 100%);
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(to top, var(--dark-bg), transparent);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 900px;
            padding: 40px 24px 80px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            border-radius: 50px;
            padding: 6px 24px;
            font-size: 0.85rem;
            color: var(--neon-cyan);
            letter-spacing: 1px;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-neon {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
            color: #fff;
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-neon:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 50px rgba(0, 212, 255, 0.5);
            color: #fff;
        }
        .btn-neon-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--dark-border);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-neon-outline:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(42, 42, 90, 0.4);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-neon,
            .btn-neon-outline {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-item .num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 4px 16px;
            }
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 100px 0;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
            border-radius: 4px;
            margin: 0 auto 20px;
        }
        .bg-dark-2 {
            background: var(--dark-bg2);
        }
        .bg-dark-3 {
            background: var(--dark-bg3);
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
        }

        /* ===== 优势卡片 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-cyan), var(--neon-pink));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }
        .feature-card:hover::before {
            transform: scaleX(1);
        }
        .feature-card:hover {
            border-color: rgba(0, 212, 255, 0.3);
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .feature-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--neon-cyan);
            transition: var(--transition);
        }
        .feature-card:hover .icon-wrap {
            background: rgba(0, 212, 255, 0.16);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }
        @media (max-width: 991px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 28px 20px;
            }
        }

        /* ===== 服务/产品卡片 ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .service-card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 45, 149, 0.25);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
        }
        .service-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--dark-border);
        }
        .service-card .card-body {
            padding: 28px 24px 32px;
        }
        .service-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }
        .service-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .service-card .card-tag {
            display: inline-block;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.15);
            border-radius: 50px;
            padding: 2px 14px;
            font-size: 0.75rem;
            color: var(--neon-cyan);
            font-weight: 500;
        }
        @media (max-width: 991px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
            .service-card .card-img {
                height: 160px;
            }
        }

        /* ===== CMS 资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: rgba(0, 212, 255, 0.2);
            transform: translateY(-4px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .news-card .meta .cat {
            background: rgba(124, 58, 237, 0.15);
            color: var(--neon-purple);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
        }
        .news-card .meta .date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .news-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-card h3 a {
            color: #fff;
            transition: var(--transition);
        }
        .news-card h3 a:hover {
            color: var(--neon-cyan);
        }
        .news-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
            flex: 1;
        }
        .news-card .read-more {
            margin-top: 16px;
            color: var(--neon-cyan);
            font-weight: 600;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .read-more:hover {
            color: var(--neon-pink);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--dark-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--dark-border);
        }
        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-md);
            padding: 36px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: rgba(0, 212, 255, 0.2);
            transform: translateY(-4px);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--neon-cyan);
            margin-bottom: 16px;
        }
        .stat-card .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 8px;
        }
        @media (max-width: 991px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-card .stat-num {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--dark-card);
            border: 1px solid var(--dark-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.15);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            transition: var(--transition);
            user-select: none;
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--neon-cyan);
        }
        .faq-question .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon-cyan);
            transition: var(--transition);
            font-size: 0.8rem;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            background: rgba(255, 45, 149, 0.15);
            color: var(--neon-pink);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                font-size: 0.85rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(124, 58, 237, 0.06));
            border-top: 1px solid var(--dark-border);
            border-bottom: 1px solid var(--dark-border);
        }
        .cta-box {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }
        .cta-box .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        @media (max-width: 768px) {
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .cta-box p {
                font-size: 0.95rem;
            }
            .cta-box .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-box .cta-actions .btn-neon,
            .cta-box .cta-actions .btn-neon-outline {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark-bg);
            border-top: 1px solid var(--dark-border);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-muted);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--neon-cyan);
            padding-left: 4px;
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(42, 42, 90, 0.3);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--neon-cyan);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(42, 42, 90, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 1rem;
        }
        .footer-social a:hover {
            background: rgba(0, 212, 255, 0.12);
            color: var(--neon-cyan);
            transform: translateY(-3px);
        }
        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 额外辅助 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .glow-cyan {
            text-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
        }
        .glow-pink {
            text-shadow: 0 0 20px rgba(255, 45, 149, 0.2);
        }
        .border-gradient {
            border-image: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink)) 1;
        }
        .mt-n1 {
            margin-top: -4px;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--dark-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--dark-border);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--neon-cyan);
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .animate-in-d1 {
            animation-delay: 0.1s;
        }
        .animate-in-d2 {
            animation-delay: 0.2s;
        }
        .animate-in-d3 {
            animation-delay: 0.3s;
        }
        .animate-in-d4 {
            animation-delay: 0.4s;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00f5ff;
            --primary-dark: #00c4cc;
            --primary-glow: rgba(0, 245, 255, 0.35);
            --accent: #ff2d78;
            --accent-glow: rgba(255, 45, 120, 0.4);
            --bg-dark: #0a0e17;
            --bg-card: #111827;
            --bg-elevated: #1a2332;
            --bg-nav: rgba(10, 14, 23, 0.92);
            --text-main: #f0f4f8;
            --text-muted: #8899b0;
            --text-dim: #5a6f88;
            --border-color: rgba(0, 245, 255, 0.15);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 245, 255, 0.06);
            --shadow-glow: 0 0 40px rgba(0, 245, 255, 0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-w: 1200px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            padding-top: 76px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #fff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        ::selection {
            background: var(--primary);
            color: #000;
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 Navbar ===== */
        .navbar-custom {
            background: var(--bg-nav);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 0;
            min-height: 76px;
            transition: background var(--transition);
        }
        .navbar-custom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            padding: 12px 0;
            white-space: nowrap;
        }
        .navbar-brand:hover {
            opacity: 0.9;
        }
        .navbar-custom .navbar-nav .nav-link {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .navbar-custom .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(0, 245, 255, 0.06);
        }
        .navbar-custom .navbar-nav .nav-link.active {
            color: #fff;
            background: rgba(0, 245, 255, 0.1);
            box-shadow: inset 0 -2px 0 var(--primary);
        }
        .navbar-custom .navbar-nav .nav-link.nav-cta {
            background: linear-gradient(135deg, var(--accent), #ff6b9d);
            color: #fff;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 20px var(--accent-glow);
            margin-left: 8px;
            transition: all var(--transition);
        }
        .navbar-custom .navbar-nav .nav-link.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--accent-glow);
            background: linear-gradient(135deg, #ff3d7a, #ff7aad);
        }
        .navbar-toggler {
            border: 1px solid var(--border-color);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: transparent;
        }
        .navbar-toggler-icon {
            filter: invert(1) brightness(2);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--primary);
        }
        @media (max-width: 991px) {
            .navbar-custom .navbar-nav {
                padding: 16px 0;
                gap: 4px;
            }
            .navbar-custom .navbar-nav .nav-link {
                padding: 12px 16px;
                font-size: 1rem;
            }
            .navbar-custom .navbar-nav .nav-link.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            body {
                padding-top: 68px;
            }
            .navbar-custom {
                min-height: 68px;
            }
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 100px 0 80px;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            isolation: isolate;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.88) 0%, rgba(10, 14, 23, 0.72) 100%);
            z-index: 0;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 245, 255, 0.05) 0%, transparent 70%);
            z-index: 0;
        }
        .article-banner .container {
            position: relative;
            z-index: 1;
        }
        .article-banner .breadcrumb-custom {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .article-banner .breadcrumb-custom a {
            color: var(--text-muted);
        }
        .article-banner .breadcrumb-custom a:hover {
            color: var(--primary);
        }
        .article-banner .breadcrumb-custom span {
            color: var(--text-dim);
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 40%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            max-width: 900px;
        }
        .article-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta i {
            margin-right: 6px;
            color: var(--primary);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
        }
        @media (max-width: 768px) {
            .article-banner {
                padding: 60px 0 50px;
            }
            .article-banner h1 {
                font-size: 1.7rem;
            }
            .article-meta {
                gap: 14px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.4rem;
            }
        }

        /* ===== 文章正文区 ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-content-wrap {
            max-width: 860px;
            margin: 0 auto;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .article-content-wrap .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-main);
        }
        .article-content-wrap .article-body p {
            margin-bottom: 1.4em;
        }
        .article-content-wrap .article-body h2,
        .article-content-wrap .article-body h3,
        .article-content-wrap .article-body h4 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            font-weight: 700;
            color: #fff;
        }
        .article-content-wrap .article-body h2 {
            font-size: 1.6rem;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .article-content-wrap .article-body h3 {
            font-size: 1.25rem;
        }
        .article-content-wrap .article-body ul,
        .article-content-wrap .article-body ol {
            margin: 1em 0;
            padding-left: 1.6em;
        }
        .article-content-wrap .article-body li {
            margin-bottom: 0.5em;
        }
        .article-content-wrap .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.5em 0;
            box-shadow: var(--shadow-card);
        }
        .article-content-wrap .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content-wrap .article-body a:hover {
            color: #fff;
        }
        .article-content-wrap .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.5em 0;
            background: rgba(255, 45, 120, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-dim);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found .btn-back {
            display: inline-block;
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #000;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition);
        }
        .article-not-found .btn-back:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px var(--primary-glow);
        }
        @media (max-width: 768px) {
            .article-content-wrap {
                padding: 28px 20px;
                border-radius: var(--radius);
            }
            .article-content-wrap .article-body {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .article-content-wrap {
                padding: 20px 14px;
            }
        }

        /* ===== 相关文章 / 推荐阅读 ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: 0 12px 40px rgba(0, 245, 255, 0.08);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h3 a {
            color: #fff;
        }
        .related-card .card-body h3 a:hover {
            color: var(--primary);
        }
        .related-card .card-body p {
            color: var(--text-muted);
            font-size: 0.88rem;
            margin-bottom: 0;
        }
        .related-card .card-meta {
            font-size: 0.78rem;
            color: var(--text-dim);
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        @media (max-width: 991px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-section .section-title {
                font-size: 1.4rem;
            }
        }

        /* ===== CTA 区块 ===== */
        .article-cta {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(0, 245, 255, 0.04), rgba(255, 45, 120, 0.04));
            border-top: 1px solid var(--border-color);
            text-align: center;
        }
        .article-cta h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .article-cta h2 span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-cta p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .article-cta .btn-cta {
            display: inline-block;
            padding: 14px 40px;
            background: linear-gradient(135deg, var(--accent), #ff6b9d);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50px;
            box-shadow: 0 6px 30px var(--accent-glow);
            transition: all var(--transition);
        }
        .article-cta .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px var(--accent-glow);
        }
        @media (max-width: 768px) {
            .article-cta h2 {
                font-size: 1.4rem;
            }
            .article-cta p {
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 Footer ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            color: var(--text-dim);
            font-size: 0.82rem;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-elevated);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            font-size: 0.9rem;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #000;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 通用辅助 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }

        /* 图片备用样式 */
        .img-placeholder {
            background: var(--bg-elevated);
            border-radius: var(--radius-sm);
            min-height: 120px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-dim);
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .article-content-wrap .article-body h2 {
                font-size: 1.3rem;
                padding-left: 12px;
            }
            .article-content-wrap .article-body h3 {
                font-size: 1.1rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0b0b1a;
            --color-secondary: #131336;
            --color-card: #14143a;
            --color-card-hover: #1c1c4a;
            --color-neon-blue: #00d4ff;
            --color-neon-purple: #7c3aed;
            --color-neon-pink: #ff2d95;
            --color-neon-green: #00f5a0;
            --color-text: #e8e8f0;
            --color-text-muted: #9d9db5;
            --color-text-dark: #6b6b8a;
            --color-border: rgba(0, 212, 255, 0.15);
            --color-border-light: rgba(0, 212, 255, 0.08);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.25);
            --shadow-neon-strong: 0 0 40px rgba(0, 212, 255, 0.35);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-card-hover: 0 16px 48px rgba(0, 212, 255, 0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --spacer: 4.5rem;
            --spacer-sm: 2.8rem;
        }

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

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

        a {
            color: var(--color-neon-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--color-neon-green);
        }
        a:focus-visible {
            outline: 2px solid var(--color-neon-blue);
            outline-offset: 4px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            border: none;
            outline: none;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-neon-blue);
            outline-offset: 2px;
        }
        ul {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: rgba(10, 10, 26, 0.92) !important;
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--color-border);
            padding: 0;
            min-height: 68px;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
            transition: var(--transition);
        }
        .navbar-custom .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            padding: 12px 0;
        }
        .navbar-custom .navbar-brand:hover {
            background: linear-gradient(135deg, var(--color-neon-green), var(--color-neon-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-custom .nav-link {
            color: var(--color-text-muted) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 22px 18px !important;
            position: relative;
            transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .navbar-custom .nav-link::after {
            content: '';
            position: absolute;
            bottom: 8px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            border-radius: 3px;
            background: var(--color-neon-blue);
            box-shadow: 0 0 12px var(--color-neon-blue);
            transition: var(--transition);
        }
        .navbar-custom .nav-link:hover {
            color: #fff !important;
        }
        .navbar-custom .nav-link:hover::after {
            width: 60%;
        }
        .navbar-custom .nav-link.active {
            color: #fff !important;
        }
        .navbar-custom .nav-link.active::after {
            width: 70%;
            background: var(--color-neon-pink);
            box-shadow: 0 0 16px var(--color-neon-pink);
        }
        .navbar-custom .nav-cta {
            background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-purple));
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: 50px;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
            transition: var(--transition);
            margin-left: 10px;
        }
        .navbar-custom .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 212, 255, 0.45);
            background: linear-gradient(135deg, var(--color-neon-green), var(--color-neon-blue));
        }
        .navbar-custom .nav-cta::after {
            display: none !important;
        }
        .navbar-toggler {
            border: 1px solid var(--color-border);
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            background: transparent;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(0,212,255,0.8)' stroke-width='2' stroke-linecap='round' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.3);
        }

        /* ===== Hero 首屏 ===== */
        .hero-category {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, rgba(11, 11, 26, 0.92), rgba(20, 20, 58, 0.88)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            position: relative;
            overflow: hidden;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-category .hero-badge {
            display: inline-block;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: var(--color-neon-blue);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-category h1 {
            font-size: 3.4rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 30%, var(--color-neon-blue) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-category p.lead {
            font-size: 1.2rem;
            color: var(--color-text-muted);
            max-width: 680px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-category .btn-hero {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-purple));
            color: #fff;
            padding: 16px 38px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 8px 32px rgba(0, 212, 255, 0.35);
            transition: var(--transition);
            border: none;
        }
        .hero-category .btn-hero:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 48px rgba(0, 212, 255, 0.5);
            color: #fff;
            background: linear-gradient(135deg, var(--color-neon-green), var(--color-neon-blue));
        }
        .hero-category .btn-hero:active {
            transform: translateY(-1px);
        }
        .hero-category .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-category .hero-stats .stat-item {
            text-align: center;
        }
        .hero-category .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-category .hero-stats .stat-number span {
            color: var(--color-neon-blue);
        }
        .hero-category .hero-stats .stat-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 2px;
        }

        /* ===== 板块标题 ===== */
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.25;
            background: linear-gradient(135deg, #fff 40%, var(--color-neon-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-subtitle {
            color: var(--color-text-muted);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }
        .section-subtitle.text-center {
            text-align: center;
        }

        /* ===== 通用板块间距 ===== */
        .section-padding {
            padding: var(--spacer) 0;
        }
        .section-padding-sm {
            padding: var(--spacer-sm) 0;
        }

        /* ===== 核心优势 ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .advantage-card {
            background: var(--color-secondary);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .advantage-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-neon-blue), var(--color-neon-purple));
            opacity: 0;
            transition: var(--transition);
        }
        .advantage-card:hover {
            background: var(--color-card-hover);
            border-color: rgba(0, 212, 255, 0.25);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }
        .advantage-card:hover::before {
            opacity: 1;
        }
        .advantage-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(0, 212, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-neon-blue);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .advantage-card:hover .icon-wrap {
            background: rgba(0, 212, 255, 0.18);
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.15);
        }
        .advantage-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }
        .advantage-card p {
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 装备分类卡片 ===== */
        .category-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cat-card {
            background: var(--color-secondary);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            cursor: default;
        }
        .cat-card:hover {
            transform: translateY(-8px);
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-card-hover);
        }
        .cat-card .cat-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
            transition: var(--transition);
        }
        .cat-card:hover .cat-img {
            transform: scale(1.03);
        }
        .cat-card .cat-body {
            padding: 22px 20px 26px;
        }
        .cat-card .cat-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .cat-card .cat-body p {
            color: var(--color-text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .cat-card .cat-body .cat-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.1);
            color: var(--color-neon-blue);
            font-size: 0.78rem;
            font-weight: 500;
            border: 1px solid rgba(0, 212, 255, 0.15);
        }

        /* ===== 选购流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--color-secondary);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: var(--shadow-card-hover);
        }
        .step-item .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: #fff;
            margin: 0 auto 18px;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.25);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .step-item p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* ===== 热门推荐卡片 ===== */
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .rec-card {
            background: var(--color-secondary);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }
        .rec-card:hover {
            transform: translateY(-8px);
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-card-hover);
        }
        .rec-card .rec-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            transition: var(--transition);
        }
        .rec-card:hover .rec-img {
            transform: scale(1.03);
        }
        .rec-card .rec-body {
            padding: 22px 20px 26px;
        }
        .rec-card .rec-body .rec-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(255, 45, 149, 0.12);
            color: var(--color-neon-pink);
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
            border: 1px solid rgba(255, 45, 149, 0.2);
        }
        .rec-card .rec-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .rec-card .rec-body p {
            color: var(--color-text-muted);
            font-size: 0.88rem;
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .rec-card .rec-body .rec-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            color: var(--color-text-dark);
            font-size: 0.8rem;
        }
        .rec-card .rec-body .rec-meta i {
            margin-right: 4px;
        }

        /* ===== FAQ ===== */
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-secondary);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }
        .faq-item .faq-question {
            width: 100%;
            background: transparent;
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            border-radius: var(--radius-md);
        }
        .faq-item .faq-question:hover {
            color: var(--color-neon-blue);
        }
        .faq-item .faq-question .faq-icon {
            font-size: 1rem;
            color: var(--color-neon-blue);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item .faq-question[aria-expanded="true"] .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            border-top: 1px solid var(--color-border-light);
            margin: 0 24px;
            padding: 18px 0 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(11, 11, 26, 0.92), rgba(20, 20, 58, 0.88)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 80px 0;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.06), transparent 70%);
            pointer-events: none;
        }
        .cta-section .cta-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section .cta-text {
            color: var(--color-text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: linear-gradient(135deg, var(--color-neon-pink), var(--color-neon-purple));
            color: #fff;
            padding: 18px 44px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 8px 32px rgba(255, 45, 149, 0.35);
            transition: var(--transition);
            border: none;
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 48px rgba(255, 45, 149, 0.5);
            color: #fff;
            background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-purple));
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #08081a;
            border-top: 1px solid var(--color-border);
            padding: 60px 0 30px;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer .footer-brand .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
            margin-bottom: 12px;
        }
        .footer .footer-brand p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer .footer-col ul li a {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer .footer-col ul li a:hover {
            color: var(--color-neon-blue);
            padding-left: 4px;
        }
        .footer .footer-bottom {
            border-top: 1px solid var(--color-border-light);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer .footer-bottom span {
            color: var(--color-text-dark);
            font-size: 0.82rem;
        }
        .footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.08);
            color: var(--color-text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
            margin-left: 8px;
        }
        .footer .footer-social a:hover {
            background: rgba(0, 212, 255, 0.18);
            color: var(--color-neon-blue);
            transform: translateY(-2px);
        }

        /* ===== 响应式设计 ===== */
        @media (max-width: 991px) {
            .navbar-custom .navbar-collapse {
                background: rgba(10, 10, 26, 0.98);
                backdrop-filter: blur(20px);
                border-radius: var(--radius-md);
                padding: 16px 20px;
                margin-top: 8px;
                border: 1px solid var(--color-border);
            }
            .navbar-custom .nav-link {
                padding: 14px 12px !important;
                text-align: center;
            }
            .navbar-custom .nav-link::after {
                bottom: 2px;
            }
            .navbar-custom .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            .hero-category {
                padding: 130px 0 70px;
                min-height: auto;
            }
            .hero-category h1 {
                font-size: 2.4rem;
            }
            .hero-category p.lead {
                font-size: 1.05rem;
            }
            .hero-category .hero-stats {
                gap: 24px;
                justify-content: center;
            }
            .section-title {
                font-size: 2rem;
            }
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 18px;
            }
            .hero-category {
                padding: 110px 0 60px;
            }
            .hero-category h1 {
                font-size: 1.9rem;
            }
            .hero-category p.lead {
                font-size: 0.95rem;
            }
            .hero-category .hero-stats .stat-number {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .advantages-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-cards {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cat-card .cat-img {
                height: 160px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .recommend-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .rec-card .rec-img {
                height: 180px;
            }
            .cta-section .cta-title {
                font-size: 1.8rem;
            }
            .cta-section .btn-cta {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer .footer-social a {
                margin: 0 4px;
            }
            .faq-item .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-item .faq-answer {
                padding: 14px 0 16px;
                margin: 0 18px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 520px) {
            .hero-category h1 {
                font-size: 1.6rem;
            }
            .hero-category .hero-stats {
                gap: 16px;
                flex-direction: column;
                align-items: center;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .hero-category .btn-hero {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
            .advantage-card {
                padding: 26px 20px;
            }
            .step-item {
                padding: 24px 18px;
            }
        }

        /* ===== 辅助类 ===== */
        .text-neon {
            color: var(--color-neon-blue);
        }
        .text-gradient {
            background: linear-gradient(135deg, var(--color-neon-blue), var(--color-neon-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .bg-dark-section {
            background: #0d0d24;
        }
        .bg-darker-section {
            background: #090918;
        }
        .border-neon-light {
            border-color: var(--color-border) !important;
        }
        .mb-section {
            margin-bottom: var(--spacer);
        }

        /* ===== Bootstrap 覆盖 ===== */
        .accordion-button:not(.collapsed) {
            background: transparent;
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
        }