/* roulang page: index */
:root {
            --primary: #0f1923;
            --primary-light: #1a2a3a;
            --secondary: #f5a623;
            --secondary-hover: #e09515;
            --accent: #7c5cbf;
            --bg-dark: #0a0f16;
            --bg-section: #111a24;
            --bg-card: #162230;
            --bg-card-hover: #1e2f42;
            --text-light: #f0f4f8;
            --text-muted: #8fa3b8;
            --text-dark: #0f1923;
            --border-color: #2a3d52;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --shadow-sm: 0 4px 20px rgba(0,0,0,0.3);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.5);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary-hover); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--border-radius-sm); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-fluid { padding: 0 24px; }
        .section-padding { padding: 80px 0; }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
            color: var(--text-light);
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 3rem;
            line-height: 1.8;
        }
        .text-gold { color: var(--secondary); }
        .bg-section-alt { background: var(--bg-section); }
        .btn-gold {
            background: var(--secondary);
            color: var(--text-dark);
            border: none;
            padding: 12px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.3);
            letter-spacing: 0.3px;
        }
        .btn-gold:hover {
            background: var(--secondary-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(245, 166, 35, 0.45);
            color: var(--text-dark);
        }
        .btn-outline-gold {
            background: transparent;
            color: var(--secondary);
            border: 2px solid var(--secondary);
            padding: 10px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .btn-outline-gold:hover {
            background: var(--secondary);
            color: var(--text-dark);
            transform: translateY(-2px);
        }
        .btn-primary-custom {
            background: linear-gradient(135deg, var(--accent), #9b7bdf);
            color: #fff;
            border: none;
            padding: 12px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(124, 92, 191, 0.3);
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(124, 92, 191, 0.5);
            color: #fff;
        }
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 32px 28px;
            transition: var(--transition);
            height: 100%;
        }
        .card-custom:hover {
            background: var(--bg-card-hover);
            transform: translateY(-6px);
            border-color: var(--secondary);
            box-shadow: var(--shadow-hover);
        }
        .badge-custom {
            background: rgba(245, 166, 35, 0.15);
            color: var(--secondary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(245, 166, 35, 0.2);
        }
        .badge-accent {
            background: rgba(124, 92, 191, 0.2);
            color: #b99aef;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(124, 92, 191, 0.25);
        }
        .divider {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 16px 0 24px;
        }
        .divider-center { margin: 16px auto 24px; }

        /* Header & Nav */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(15, 25, 35, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(42, 61, 82, 0.4);
            transition: var(--transition);
        }
        .header.scrolled { background: rgba(10, 15, 22, 0.98); }
        .navbar { padding: 12px 0; }
        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-light) !important;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text-dark);
            font-weight: 800;
            flex-shrink: 0;
        }
        .navbar-nav .nav-link {
            color: var(--text-muted) !important;
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--text-light) !important;
            background: rgba(245, 166, 35, 0.08);
        }
        .navbar-nav .nav-link.active { color: var(--secondary) !important; }
        .nav-cta-btn {
            background: var(--secondary);
            color: var(--text-dark) !important;
            padding: 8px 28px !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            margin-left: 12px;
        }
        .nav-cta-btn:hover {
            background: var(--secondary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(245, 166, 35, 0.35);
        }
        .navbar-toggler {
            border: none;
            padding: 0;
            color: var(--text-light);
            font-size: 1.6rem;
            background: transparent;
        }
        .navbar-toggler:focus { box-shadow: none; outline: 2px solid var(--secondary); }

        /* Hero */
        .hero {
            padding: 140px 0 80px;
            position: relative;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #0d1a2a 50%, #111a24 100%);
            overflow: hidden;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
            mask-image: linear-gradient(to bottom, rgba(0,0,0,0.7) 0%, transparent 80%);
            -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.7) 0%, transparent 80%);
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(245,166,35,0.06) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 30%, rgba(124,92,191,0.08) 0%, transparent 50%);
            z-index: 0;
        }
        .hero-content { position: relative; z-index: 1; }
        .hero-badge {
            display: inline-block;
            background: rgba(245, 166, 35, 0.12);
            border: 1px solid rgba(245, 166, 35, 0.2);
            color: var(--secondary);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .hero h1 span { color: var(--secondary); }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 580px;
            line-height: 1.9;
            margin-bottom: 32px;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(42, 61, 82, 0.4);
        }
        .hero-stat h3 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 2px;
        }
        .hero-stat p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* Features */
        .feature-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, rgba(245,166,35,0.12), rgba(124,92,191,0.12));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--secondary);
            margin-bottom: 18px;
            border: 1px solid rgba(245,166,35,0.1);
        }
        .card-custom h5 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; color: var(--text-light); }
        .card-custom p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; margin: 0; }

        /* Game Categories */
        .game-cat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            cursor: pointer;
        }
        .game-cat-card:hover {
            transform: translateY(-6px);
            border-color: var(--secondary);
            box-shadow: var(--shadow-hover);
        }
        .game-cat-card .cat-img {
            height: 200px;
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }
        .game-cat-card .cat-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .game-cat-card:hover .cat-img img { transform: scale(1.05); }
        .game-cat-card .cat-body { padding: 22px 24px 26px; }
        .game-cat-card .cat-body h5 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; }
        .game-cat-card .cat-body p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }
        .game-cat-card .cat-tag {
            display: inline-block;
            background: rgba(245,166,35,0.1);
            color: var(--secondary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            margin-top: 12px;
        }

        /* Latest News / CMS */
        .news-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-sm);
            padding: 20px 24px;
            transition: var(--transition);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
        }
        .news-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--secondary);
            transform: translateX(4px);
        }
        .news-item .news-tag {
            background: rgba(124,92,191,0.15);
            color: #b99aef;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .news-item .news-title {
            flex: 1;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-light);
            transition: var(--transition);
        }
        .news-item:hover .news-title { color: var(--secondary); }
        .news-item .news-date {
            color: var(--text-muted);
            font-size: 0.85rem;
            flex-shrink: 0;
            white-space: nowrap;
        }
        .news-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--border-radius);
            border: 1px dashed var(--border-color);
        }

        /* Process / Steps */
        .step-card {
            text-align: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 36px 28px;
            transition: var(--transition);
            height: 100%;
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }
        .step-number {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-dark);
            margin: 0 auto 18px;
        }
        .step-card h5 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .step-card p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }

        /* Testimonials */
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 28px 30px;
            transition: var(--transition);
            height: 100%;
        }
        .testimonial-card:hover {
            border-color: var(--secondary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .testimonial-card .stars { color: var(--secondary); font-size: 1rem; margin-bottom: 12px; }
        .testimonial-card blockquote {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            font-style: italic;
            margin-bottom: 16px;
        }
        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .author .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--text-dark);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .testimonial-card .author .name { font-weight: 600; font-size: 0.95rem; color: var(--text-light); }
        .testimonial-card .author .role { font-size: 0.8rem; color: var(--text-muted); }

        /* FAQ */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-sm);
            padding: 20px 24px;
            margin-bottom: 10px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover { border-color: rgba(245,166,35,0.2); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-light);
        }
        .faq-question .faq-toggle {
            font-size: 1.3rem;
            color: var(--secondary);
            transition: var(--transition);
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-answer {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            margin-top: 14px;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active .faq-toggle { transform: rotate(45deg); }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #0d1a2a 0%, #1a2a3a 100%);
            border-radius: var(--border-radius);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section > * { position: relative; z-index: 1; }
        .cta-section h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 16px; }
        .cta-section p { color: var(--text-muted); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }

        /* Footer */
        .footer {
            background: var(--primary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 32px;
        }
        .footer-brand { font-size: 1.2rem; font-weight: 700; color: var(--text-light); margin-bottom: 8px; }
        .footer-desc { color: var(--text-muted); font-size: 0.9rem; max-width: 320px; line-height: 1.7; }
        .footer-links { list-style: none; padding: 0; margin: 0; }
        .footer-links li { margin-bottom: 8px; }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover { color: var(--secondary); padding-left: 4px; }
        .footer h6 { color: var(--text-light); font-weight: 600; font-size: 0.95rem; margin-bottom: 16px; letter-spacing: 0.5px; }
        .footer-divider { border-color: var(--border-color); margin: 28px 0 20px; }
        .footer-copy { color: var(--text-muted); font-size: 0.85rem; text-align: center; }
        .footer-copy a { color: var(--text-muted); }
        .footer-copy a:hover { color: var(--secondary); }
        .footer-social a {
            display: inline-flex;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.04);
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
            margin-left: 8px;
            border: 1px solid var(--border-color);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--text-dark);
            border-color: var(--secondary);
        }

        /* Responsive */
        @media (max-width: 991px) {
            .hero h1 { font-size: 2.6rem; }
            .hero { min-height: auto; padding: 120px 0 60px; }
            .section-padding { padding: 60px 0; }
            .section-title { font-size: 1.8rem; }
            .cta-section { padding: 48px 28px; }
            .navbar-nav .nav-link { padding: 10px 16px !important; }
            .nav-cta-btn { margin-left: 0; margin-top: 8px; display: inline-block; text-align: center; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
        }
        @media (max-width: 767px) {
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 16px; flex-direction: column; }
            .hero-stat h3 { font-size: 1.6rem; }
            .section-title { font-size: 1.6rem; }
            .section-padding { padding: 48px 0; }
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section { padding: 36px 20px; }
            .footer { padding: 32px 0 24px; }
            .news-item { flex-direction: column; align-items: flex-start; gap: 8px; }
            .navbar-brand { font-size: 1.15rem; }
            .navbar-brand .brand-icon { width: 30px; height: 30px; font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.7rem; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; text-align: center; }
            .container { padding: 0 16px; }
            .section-padding { padding: 36px 0; }
            .cta-section { border-radius: var(--border-radius-sm); padding: 28px 16px; }
            .card-custom { padding: 24px 20px; }
        }
        @media (min-width: 992px) {
            .navbar-nav .nav-link { padding: 8px 20px !important; }
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #28284e;
            --secondary: #e94560;
            --secondary-light: #ff6b7a;
            --accent: #f5a623;
            --accent-light: #ffc75f;
            --dark-bg: #0f0f1a;
            --card-bg: #1e1e36;
            --card-border: #2a2a4a;
            --text-light: #f0f0f5;
            --text-muted: #9a9abf;
            --text-dark: #111122;
            --body-bg: #0a0a14;
            --section-bg-alt: #12121f;
            --border-color: #2a2a4a;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(233,69,96,0.15);
            --font-base: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        /* ========== 基础 Reset & Base ========== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-base);
            background-color: var(--body-bg);
            color: var(--text-light);
            line-height: 1.7;
            font-size: 1rem;
            overflow-x: hidden;
        }
        a { color: var(--secondary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-light); }
        .container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
        ::selection { background: var(--secondary); color: #fff; }

        /* ========== 导航 ========== */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1050;
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(42, 42, 74, 0.4);
            transition: background var(--transition);
        }
        .header .navbar { padding: 12px 0; }
        .navbar-brand {
            font-size: 1.35rem; font-weight: 800; color: var(--text-light) !important;
            display: flex; align-items: center; gap: 10px; letter-spacing: 0.5px;
        }
        .navbar-brand .brand-icon {
            width: 36px; height: 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px; display: inline-flex; align-items: center; justify-content: center;
            font-weight: 800; font-size: 1.2rem; color: var(--text-dark);
        }
        .navbar-nav .nav-link {
            color: var(--text-muted) !important; font-weight: 500; padding: 8px 18px !important;
            border-radius: var(--radius-sm); transition: all var(--transition); font-size: 0.95rem;
        }
        .navbar-nav .nav-link:hover { color: var(--text-light) !important; background: rgba(233,69,96,0.08); }
        .navbar-nav .nav-link.active { color: var(--text-light) !important; background: rgba(233,69,96,0.12); }
        .navbar-nav .nav-cta-btn {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: #fff !important; padding: 10px 24px !important; border-radius: 50px;
            font-weight: 700; letter-spacing: 0.3px; box-shadow: 0 4px 16px rgba(233,69,96,0.3);
            transition: all var(--transition);
        }
        .navbar-nav .nav-cta-btn:hover {
            transform: translateY(-2px); box-shadow: 0 6px 24px rgba(233,69,96,0.45);
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
        }
        .navbar-toggler { border: none; color: var(--text-light); font-size: 1.5rem; padding: 4px 8px; }
        .navbar-toggler:focus { box-shadow: none; }
        .navbar-toggler .bi-list { color: var(--text-light); }

        /* ========== 文章 Hero ========== */
        .article-hero {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -30%; right: -10%;
            width: 500px; height: 500px;
            background: radial-gradient(circle, rgba(233,69,96,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -20%; left: -5%;
            width: 400px; height: 400px;
            background: radial-gradient(circle, rgba(245,166,35,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .article-meta {
            display: flex; flex-wrap: wrap; gap: 16px 24px;
            color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px;
        }
        .article-hero .article-meta i { margin-right: 6px; color: var(--secondary); }
        .article-hero .article-meta .badge-cat {
            background: rgba(233,69,96,0.2);
            color: var(--secondary-light);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .article-hero h1 {
            font-size: 2.6rem; font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            max-width: 900px;
            line-height: 1.25;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .article-hero .lead {
            font-size: 1.1rem; color: var(--text-muted);
            max-width: 700px;
        }
        @media (max-width: 768px) {
            .article-hero { padding: 110px 0 40px; min-height: 240px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero .lead { font-size: 0.95rem; }
        }

        /* ========== 文章正文 ========== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--body-bg);
        }
        .article-content {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-content .content-body {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 40px 48px;
            box-shadow: var(--shadow-md);
            line-height: 1.9;
            font-size: 1.05rem;
            color: rgba(240,240,245,0.92);
        }
        .article-content .content-body p { margin-bottom: 1.4em; }
        .article-content .content-body h2,
        .article-content .content-body h3 {
            margin-top: 1.8em; margin-bottom: 0.8em;
            color: var(--text-light);
        }
        .article-content .content-body h2 { font-size: 1.7rem; border-left: 4px solid var(--secondary); padding-left: 16px; }
        .article-content .content-body h3 { font-size: 1.3rem; }
        .article-content .content-body img {
            border-radius: var(--radius-sm);
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content .content-body ul, 
        .article-content .content-body ol { padding-left: 1.5em; margin-bottom: 1.4em; }
        .article-content .content-body li { margin-bottom: 0.5em; }
        .article-content .content-body a { color: var(--accent); text-decoration: underline; }
        .article-content .content-body a:hover { color: var(--secondary-light); }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(245,166,35,0.06);
            padding: 16px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5em 0;
            color: var(--text-muted);
            font-style: italic;
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
        }
        .article-not-found i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; display: block; }
        .article-not-found h3 { font-size: 1.6rem; margin-bottom: 12px; }
        .article-not-found p { color: var(--text-muted); margin-bottom: 24px; }
        .article-not-found .btn-back {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px; border-radius: 50px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: #fff; font-weight: 700; border: none;
            transition: all var(--transition);
        }
        .article-not-found .btn-back:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(233,69,96,0.4); }

        @media (max-width: 768px) {
            .article-content .content-body { padding: 24px 20px; font-size: 0.98rem; }
        }

        /* ========== 相关推荐 ========== */
        .article-related {
            padding: 60px 0 80px;
            background: var(--section-bg-alt);
        }
        .article-related h2 {
            font-size: 1.8rem; font-weight: 800; margin-bottom: 36px;
            text-align: center;
        }
        .article-related h2 span { color: var(--secondary); }
        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            border-color: rgba(233,69,96,0.25);
        }
        .related-card .card-img {
            height: 200px;
            background-size: cover; background-position: center;
            position: relative;
        }
        .related-card .card-img .badge-related {
            position: absolute; top: 12px; left: 12px;
            background: rgba(233,69,96,0.85);
            color: #fff; padding: 4px 14px; border-radius: 50px;
            font-size: 0.75rem; font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .related-card .card-body { padding: 20px 24px 24px; }
        .related-card .card-body h5 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
        .related-card .card-body h5 a { color: var(--text-light); transition: color var(--transition); }
        .related-card .card-body h5 a:hover { color: var(--secondary); }
        .related-card .card-body p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0; }

        /* ========== CTA ========== */
        .article-cta {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary-light), var(--dark-bg));
            text-align: center;
        }
        .article-cta h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 12px; }
        .article-cta p { color: var(--text-muted); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
        .article-cta .btn-cta {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 40px; border-radius: 50px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            color: #fff; font-weight: 700; font-size: 1.05rem;
            border: none; box-shadow: 0 4px 20px rgba(233,69,96,0.35);
            transition: all var(--transition);
        }
        .article-cta .btn-cta:hover {
            transform: translateY(-3px); box-shadow: 0 8px 32px rgba(233,69,96,0.5);
            color: #fff;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--dark-bg);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-brand { font-size: 1.2rem; font-weight: 800; color: var(--text-light); margin-bottom: 12px; }
        .footer-desc { color: var(--text-muted); font-size: 0.9rem; max-width: 320px; line-height: 1.7; }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            width: 40px; height: 40px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 50%;
            display: inline-flex; align-items: center; justify-content: center;
            color: var(--text-muted); font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary); color: #fff; border-color: var(--secondary);
            transform: translateY(-3px);
        }
        .footer h6 {
            font-size: 0.85rem; font-weight: 700; text-transform: uppercase;
            color: var(--text-light); letter-spacing: 1px; margin-bottom: 16px;
        }
        .footer-links { list-style: none; padding: 0; margin: 0; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a {
            color: var(--text-muted); font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-links a:hover { color: var(--secondary); }
        .footer-divider {
            border-color: var(--border-color);
            margin: 28px 0 20px;
            opacity: 0.5;
        }
        .footer-copy { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
        .footer-copy p { color: var(--text-muted); font-size: 0.85rem; }
        .footer-copy a { color: var(--text-muted); font-size: 0.85rem; }
        .footer-copy a:hover { color: var(--secondary); }

        /* ========== 响应式 ========== */
        @media (max-width: 992px) {
            .navbar-nav .nav-cta-btn { margin-top: 8px; margin-left: 0 !important; }
            .footer .col-md-2 { margin-top: 24px; }
        }
        @media (max-width: 768px) {
            .article-related h2 { font-size: 1.4rem; }
            .article-cta h2 { font-size: 1.4rem; }
            .footer-copy { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-content .content-body { padding: 20px 16px; }
            .related-card .card-img { height: 160px; }
        }

/* roulang page: category1 */
/* ============================================
                   :root 设计变量
                ============================================ */
        :root {
            --primary: #6c3bff;
            --primary-rgb: 108, 59, 255;
            --primary-dark: #4a1fcc;
            --primary-light: #8f6bff;
            --secondary: #ff6b35;
            --secondary-rgb: 255, 107, 53;
            --accent: #00d4aa;
            --accent-rgb: 0, 212, 170;
            --bg-dark: #0d0b1a;
            --bg-darker: #080714;
            --bg-card: #141126;
            --bg-card-hover: #1c1736;
            --bg-section-alt: #0f0c20;
            --text-light: #f0eeff;
            --text-muted: #9a94b8;
            --text-dark: #0d0b1a;
            --border-color: rgba(108, 59, 255, 0.2);
            --border-glow: rgba(108, 59, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(108, 59, 255, 0.2);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --header-height: 76px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-light);
            background-color: var(--bg-dark);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent);
        }

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

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

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-light);
            margin-bottom: 0.5em;
        }

        p {
            margin-bottom: 1rem;
            color: var(--text-muted);
        }

        /* ============================================
                   容器
                ============================================ */
        .container {
            max-width: var(--container-max);
            padding-left: 1.25rem;
            padding-right: 1.25rem;
            margin-left: auto;
            margin-right: auto;
            width: 100%;
        }

        /* ============================================
                   导航栏
                ============================================ */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(13, 11, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
            height: var(--header-height);
        }

        .header .navbar {
            padding: 0.6rem 0;
            height: 100%;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.5px;
            transition: var(--transition);
            padding: 0;
        }

        .navbar-brand:hover {
            color: var(--primary-light);
            transform: scale(1.02);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--text-dark);
            flex-shrink: 0;
            box-shadow: 0 0 20px rgba(255, 107, 53, 0.25);
        }

        .navbar .nav-link {
            color: var(--text-muted);
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            font-size: 0.95rem;
        }

        .navbar .nav-link:hover {
            color: var(--text-light);
            background: rgba(108, 59, 255, 0.1);
        }

        .navbar .nav-link.active {
            color: var(--text-light);
            background: rgba(108, 59, 255, 0.15);
        }

        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta-btn {
            background: linear-gradient(135deg, var(--secondary), var(--accent)) !important;
            color: var(--text-dark) !important;
            font-weight: 700 !important;
            padding: 0.55rem 1.5rem !important;
            border-radius: 50px !important;
            box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
            transition: var(--transition) !important;
            border: none;
        }

        .nav-cta-btn:hover {
            transform: translateY(-2px) scale(1.03);
            box-shadow: 0 8px 30px rgba(255, 107, 53, 0.45);
            color: var(--text-dark) !important;
            background: linear-gradient(135deg, var(--secondary), var(--accent)) !important;
        }

        .navbar-toggler {
            border: none;
            color: var(--text-light);
            font-size: 1.6rem;
            padding: 0;
            background: transparent;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ============================================
                   Hero 区域（分类页横幅）
                ============================================ */
        .category-hero {
            padding: 140px 0 80px;
            position: relative;
            background: var(--bg-darker);
            min-height: 420px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 11, 26, 0.92) 40%, rgba(108, 59, 255, 0.25) 100%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(108, 59, 255, 0.2);
            border: 1px solid var(--border-glow);
            color: var(--primary-light);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.35rem 1rem;
            border-radius: 50px;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 1rem;
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 0.75rem;
            letter-spacing: -1px;
        }

        .category-hero h1 .highlight {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-hero .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 1.5rem;
        }

        .category-hero .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin-top: 1.5rem;
        }

        .category-hero .hero-stats .stat-item {
            text-align: center;
        }

        .category-hero .hero-stats .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.2;
        }

        .category-hero .hero-stats .stat-num .accent {
            color: var(--accent);
        }

        .category-hero .hero-stats .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ============================================
                   通用板块
                ============================================ */
        .section {
            padding: 80px 0;
        }

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

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 0.75rem;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 2.5rem;
            text-align: center;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }

        .section-header .section-badge {
            display: inline-block;
            background: rgba(108, 59, 255, 0.15);
            border: 1px solid var(--border-color);
            color: var(--primary-light);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.3rem 1rem;
            border-radius: 50px;
            letter-spacing: 0.5px;
            margin-bottom: 0.75rem;
        }

        /* ============================================
                   卡片
                ============================================ */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .card-custom:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }

        .card-custom .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1rem;
            background: rgba(108, 59, 255, 0.15);
            color: var(--primary-light);
            transition: var(--transition);
        }

        .card-custom:hover .card-icon {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: var(--text-dark);
            transform: scale(1.05);
        }

        .card-custom h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }

        .card-custom p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .card-custom .card-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(0, 212, 170, 0.1);
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            margin-top: 0.75rem;
            border: 1px solid rgba(0, 212, 170, 0.2);
        }

        /* 图片卡片 */
        .card-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }

        .card-image:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            border-color: var(--border-glow);
        }

        .card-image .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }

        .card-image:hover .card-img-top {
            transform: scale(1.03);
        }

        .card-image .card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }

        .card-image .card-body .card-label {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(0, 212, 170, 0.1);
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            margin-bottom: 0.5rem;
            border: 1px solid rgba(0, 212, 170, 0.2);
        }

        .card-image .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }

        .card-image .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }

        .card-image .card-body .card-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        /* ============================================
                   按钮
                ============================================ */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 0.7rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary-custom {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--text-light);
            box-shadow: 0 4px 20px rgba(108, 59, 255, 0.3);
        }

        .btn-primary-custom:hover {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 59, 255, 0.45);
            color: var(--text-light);
        }

        .btn-secondary-custom {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: var(--text-dark);
            box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
        }

        .btn-secondary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(255, 107, 53, 0.45);
            color: var(--text-dark);
        }

        .btn-outline-custom {
            background: transparent;
            color: var(--text-light);
            border: 2px solid var(--border-glow);
        }

        .btn-outline-custom:hover {
            background: rgba(108, 59, 255, 0.15);
            border-color: var(--primary-light);
            color: var(--text-light);
            transform: translateY(-2px);
        }

        /* ============================================
                   流程 / 步骤
                ============================================ */
        .step-card {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
            height: 100%;
            position: relative;
        }

        .step-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }

        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: var(--text-dark);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            box-shadow: 0 0 25px rgba(255, 107, 53, 0.25);
        }

        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .step-connector {
            display: none;
        }

        @media (min-width: 768px) {
            .step-connector {
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 1.5rem;
                color: var(--primary);
                opacity: 0.4;
            }
        }

        /* ============================================
                   FAQ
                ============================================ */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            padding: 1.25rem 1.75rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-light);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--primary-light);
            transition: var(--transition);
            flex-shrink: 0;
            margin-left: 1rem;
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            padding: 0 1.75rem 1.25rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* ============================================
                   CTA 区域
                ============================================ */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-darker);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(108, 59, 255, 0.12), rgba(0, 212, 170, 0.08));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 3.5rem 3rem;
            text-align: center;
            backdrop-filter: blur(10px);
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }

        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 1.75rem;
        }

        .cta-box .btn-group-cta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }

        /* ============================================
                   页脚
                ============================================ */
        .footer {
            background: var(--bg-darker);
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-color);
        }

        .footer .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 1rem;
        }

        .footer .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 340px;
            line-height: 1.7;
        }

        .footer .footer-social {
            display: flex;
            gap: 0.75rem;
        }

        .footer .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(108, 59, 255, 0.12);
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .footer .footer-social a:hover {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: var(--text-dark);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .footer h6 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .footer .footer-links {
            padding: 0;
            margin: 0;
        }

        .footer .footer-links li {
            margin-bottom: 0.5rem;
        }

        .footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: var(--transition);
        }

        .footer .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-divider {
            border-color: var(--border-color);
            margin: 2rem 0 1.5rem;
            opacity: 0.5;
        }

        .footer-copy {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 0.75rem;
        }

        .footer-copy p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin: 0;
        }

        .footer-copy a {
            color: var(--text-muted);
        }

        .footer-copy a:hover {
            color: var(--primary-light);
        }

        /* ============================================
                   响应式断点
                ============================================ */
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(13, 11, 26, 0.98);
                backdrop-filter: blur(20px);
                padding: 1rem 1.25rem;
                border-radius: var(--radius-md);
                margin-top: 0.5rem;
                border: 1px solid var(--border-color);
            }

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

            .navbar .nav-link {
                padding: 0.6rem 1rem;
            }

            .nav-cta-btn {
                margin-top: 0.5rem;
                text-align: center;
            }

            .category-hero {
                padding: 120px 0 60px;
                min-height: auto;
            }

            .category-hero h1 {
                font-size: 2rem;
            }

            .category-hero .hero-desc {
                font-size: 1rem;
            }

            .category-hero .hero-stats {
                gap: 1.25rem;
            }

            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .cta-box {
                padding: 2.5rem 1.5rem;
            }

            .cta-box h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 767px) {
            .header .navbar {
                padding: 0.4rem 0;
            }

            .navbar-brand {
                font-size: 1.1rem;
            }

            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 0.95rem;
            }

            .category-hero h1 {
                font-size: 1.6rem;
            }

            .category-hero .hero-desc {
                font-size: 0.92rem;
            }

            .category-hero .hero-stats .stat-num {
                font-size: 1.4rem;
            }

            .category-hero .hero-stats {
                gap: 1rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .section {
                padding: 48px 0;
            }

            .cta-section {
                padding: 48px 0;
            }

            .cta-box h2 {
                font-size: 1.3rem;
            }

            .cta-box p {
                font-size: 0.92rem;
            }

            .footer .footer-brand {
                font-size: 1rem;
            }

            .footer-copy {
                flex-direction: column;
                text-align: center;
            }

            .card-image .card-img-top {
                height: 160px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .category-hero h1 {
                font-size: 1.4rem;
            }

            .category-hero .hero-stats .stat-item {
                flex: 1 1 40%;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .card-custom {
                padding: 1.25rem;
            }

            .cta-box {
                padding: 1.75rem 1rem;
            }

            .cta-box .btn-group-cta {
                flex-direction: column;
                align-items: center;
            }

            .cta-box .btn-group-cta .btn-custom {
                width: 100%;
                justify-content: center;
            }
        }

        /* ============================================
                   工具类
                ============================================ */
        .text-gradient {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .text-gradient-primary {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .mb-gap {
            margin-bottom: 2rem;
        }

        .mt-gap {
            margin-top: 2rem;
        }

        /* Bootstrap 覆盖 */
        .row.gap-y {
            --bs-gutter-y: 1.5rem;
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-darker);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }

        /* 选中高亮 */
        ::selection {
            background: rgba(108, 59, 255, 0.4);
            color: var(--text-light);
        }