/* roulang page: index */
:root {
            --brand-600: #5552e0;
            --brand-700: #4338ca;
            --accent-500: #f89c2e;
            --text-primary: #1a1a2e;
            --text-secondary: #5a5a7a;
            --text-muted: #8a8aa8;
            --border-light: #e8eaf0;
            --radius-lg: 1.25rem;
            --shadow-card: 0 4px 24px rgba(0,0,0,0.07);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            color: #1a1a2e;
            background-color: #f8f9fc;
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            transition: all var(--transition-base);
        }

        /* 悬浮胶囊导航 */
        .nav-capsule {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255,255,255,0.7);
            border-radius: 3rem;
            box-shadow: 0 4px 28px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.04);
            position: sticky;
            top: 16px;
            z-index: 1000;
            transition: all var(--transition-base);
        }

        .nav-capsule.scrolled {
            box-shadow: 0 6px 36px rgba(0,0,0,0.12);
            background: rgba(255,255,255,0.97);
        }

        .nav-capsule .nav-link {
            font-weight: 500;
            font-size: 0.95rem;
            color: #5a5a7a;
            padding: 0.55rem 1.25rem;
            border-radius: 2.5rem;
            transition: all var(--transition-base);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .nav-capsule .nav-link:hover {
            color: #4338ca;
            background: rgba(107,110,245,0.08);
        }

        .nav-capsule .nav-link.active {
            color: #ffffff;
            background: linear-gradient(135deg, #6b6ef5 0%, #4338ca 100%);
            box-shadow: 0 4px 14px rgba(67,56,202,0.3);
            font-weight: 600;
        }

        .nav-capsule .nav-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: #1a1a2e;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            border-radius: 2rem;
            overflow: hidden;
            margin-top: -80px;
            padding-top: 80px;
        }

        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,26,46,0.88) 0%, rgba(30,22,128,0.78) 40%, rgba(67,56,202,0.65) 100%);
            z-index: 1;
        }

        .hero-bg-img {
            position: absolute;
            inset: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            z-index: 0;
        }

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

        /* 卡片悬停 */
        .card-hover {
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 40px rgba(0,0,0,0.12);
        }

        /* FAQ */
        .faq-item {
            border: 1px solid #e8eaf0;
            border-radius: 1rem;
            background: #ffffff;
            transition: all var(--transition-base);
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: #c1c6ff;
            box-shadow: 0 2px 12px rgba(107,110,245,0.06);
        }
        .faq-item summary {
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 1.25rem 1.5rem;
            color: #1a1a2e;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 300;
            color: #6b6ef5;
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 1rem;
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: #5a5a7a;
            line-height: 1.8;
        }

        /* 按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #6b6ef5 0%, #4338ca 100%);
            color: #fff;
            font-weight: 600;
            padding: 0.85rem 2rem;
            border-radius: 3rem;
            border: none;
            box-shadow: 0 6px 22px rgba(67,56,202,0.3);
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
            font-size: 1rem;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(67,56,202,0.4);
            background: linear-gradient(135deg, #7b7ef8 0%, #5048d8 100%);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 14px rgba(67,56,202,0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: #ffffff;
            font-weight: 600;
            padding: 0.8rem 2rem;
            border-radius: 3rem;
            border: 2px solid rgba(255,255,255,0.7);
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
            font-size: 1rem;
            cursor: pointer;
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #ffffff;
            transform: translateY(-2px);
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #f89c2e 0%, #e07d18 100%);
            color: #fff;
            font-weight: 600;
            padding: 0.85rem 2rem;
            border-radius: 3rem;
            border: none;
            box-shadow: 0 6px 22px rgba(248,156,46,0.3);
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
            font-size: 1rem;
            cursor: pointer;
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(248,156,46,0.4);
        }

        /* 统计数字 */
        .stat-number {
            font-size: 2.75rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #6b6ef5 0%, #4338ca 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* 标签 */
        .tag-badge {
            display: inline-block;
            padding: 0.3rem 0.85rem;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        /* 移动端导航 */
        .mobile-menu {
            display: none;
        }
        .mobile-menu.open {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: #ffffff;
            border-radius: 1.5rem;
            box-shadow: 0 12px 36px rgba(0,0,0,0.14);
            padding: 1rem;
            margin-top: 0.75rem;
            z-index: 999;
        }

        @media (max-width: 768px) {
            .nav-capsule {
                border-radius: 2rem;
                top: 8px;
            }
            .nav-capsule .nav-desktop-links {
                display: none;
            }
            .nav-capsule .mobile-menu-trigger {
                display: flex;
            }
            .hero-section {
                min-height: 480px;
                border-radius: 1.25rem;
                margin-top: -60px;
                padding-top: 60px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .hero-section h1 {
                font-size: 1.8rem !important;
            }
            .hero-section p {
                font-size: 1rem !important;
            }
        }

        @media (min-width: 769px) {
            .nav-capsule .mobile-menu-trigger {
                display: none;
            }
            .nav-capsule .nav-desktop-links {
                display: flex;
            }
            .mobile-menu {
                display: none !important;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                min-height: 400px;
                border-radius: 1rem;
                margin-top: -50px;
                padding-top: 50px;
            }
            .hero-section h1 {
                font-size: 1.45rem !important;
            }
            .btn-primary, .btn-outline, .btn-accent {
                padding: 0.7rem 1.4rem;
                font-size: 0.9rem;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .nav-capsule {
                border-radius: 1.75rem;
            }
            .nav-capsule .nav-brand {
                font-size: 0.95rem;
            }
        }

/* roulang page: category1 */
:root {
            --brand-600: #2550ec;
            --brand-700: #1d3fd9;
            --accent-500: #fa7c14;
            --surface-50: #f8fafc;
            --surface-900: #0f172a;
            --shadow-soft: 0 2px 16px rgba(0, 0, 0, 0.06);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.07);
            --shadow-lift: 0 8px 32px rgba(0, 0, 0, 0.10);
            --radius-xl: 1rem;
            --radius-2xl: 1.25rem;
            --radius-3xl: 1.75rem;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            line-height: 1.65;
            color: #1e293b;
            background-color: #fafbfc;
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        button {
            font-size: inherit;
        }

        /* 导航胶囊 */
        .nav-capsule {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: 3rem;
            border: 1px solid rgba(255, 255, 255, 0.7);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.07), 0 0 0 1px rgba(0, 0, 0, 0.04);
            transition: box-shadow var(--transition-base), background var(--transition-base);
        }

        .nav-capsule:hover {
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.10), 0 0 0 1px rgba(0, 0, 0, 0.05);
        }

        .nav-brand {
            font-weight: 700;
            font-size: 1.125rem;
            letter-spacing: -0.01em;
            color: #0f172a;
            white-space: nowrap;
            transition: color var(--transition-base);
        }

        .nav-brand:hover {
            color: #2550ec;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1.05rem;
            border-radius: 2rem;
            font-size: 0.925rem;
            font-weight: 500;
            color: #475569;
            transition: all var(--transition-base);
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: #1d3fd9;
            background: rgba(37, 80, 236, 0.06);
        }

        .nav-link.active {
            color: #ffffff;
            background: #2550ec;
            font-weight: 600;
            box-shadow: 0 2px 12px rgba(37, 80, 236, 0.30);
        }

        .nav-link.active:hover {
            color: #ffffff;
            background: #1d3fd9;
            box-shadow: 0 4px 18px rgba(37, 80, 236, 0.38);
        }

        .nav-desktop-links {
            display: flex;
        }

        /* 移动端菜单 */
        .mobile-menu-trigger {
            display: none;
        }

        .mobile-menu {
            display: none;
        }

        @media (max-width: 767px) {
            .nav-desktop-links {
                display: none;
            }

            .mobile-menu-trigger {
                display: flex;
            }

            .mobile-menu {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                background: #ffffff;
                border-radius: 1.25rem;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.14);
                padding: 0.75rem 0.5rem;
                z-index: 100;
                flex-direction: column;
                gap: 0.25rem;
                border: 1px solid #e2e8f0;
            }

            .mobile-menu.open {
                display: flex;
            }

            .mobile-menu .nav-link {
                display: block;
                text-align: center;
                padding: 0.7rem 1rem;
                border-radius: 1rem;
                font-size: 0.95rem;
            }

            .nav-capsule {
                border-radius: 2rem;
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        @media (min-width: 768px) {
            .nav-desktop-links {
                display: flex;
            }

            .mobile-menu-trigger {
                display: none;
            }

            .mobile-menu {
                display: none !important;
            }
        }

        /* Hero */
        .hero-section {
            position: relative;
            overflow: hidden;
            background: linear-gradient(160deg, #0f1a3a 0%, #16204e 30%, #1a2d6b 60%, #1e3990 100%);
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
            mix-blend-mode: overlay;
            pointer-events: none;
        }

        .hero-glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59, 108, 247, 0.35) 0%, transparent 70%);
            top: -120px;
            right: -100px;
            pointer-events: none;
            animation: heroGlowPulse 6s ease-in-out infinite;
        }

        @keyframes heroGlowPulse {
            0%,
            100% {
                opacity: 0.6;
                transform: scale(1);
            }
            50% {
                opacity: 1;
                transform: scale(1.18);
            }
        }

        /* 板块通用 */
        .section-padding {
            padding: 4rem 1.5rem;
        }

        @media (min-width: 768px) {
            .section-padding {
                padding: 5rem 2rem;
            }
            .hero-section {
                min-height: 560px;
            }
        }

        @media (min-width: 1024px) {
            .section-padding {
                padding: 6rem 2rem;
            }
            .hero-section {
                min-height: 600px;
            }
        }

        /* 卡片 */
        .feature-card {
            background: #ffffff;
            border-radius: var(--radius-2xl);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-soft);
            border: 1px solid #f1f5f9;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-lift);
            transform: translateY(-3px);
            border-color: #e2e8f0;
        }

        .feature-card .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
            transition: transform var(--transition-base);
        }

        .feature-card:hover .icon-wrap {
            transform: scale(1.08);
        }

        .game-card {
            background: #ffffff;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-soft);
            border: 1px solid #f1f5f9;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .game-card:hover {
            box-shadow: var(--shadow-lift);
            transform: translateY(-4px);
            border-color: #e2e8f0;
        }

        .game-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #e2e8f0;
        }

        .game-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .game-card:hover .card-img-wrap img {
            transform: scale(1.07);
        }

        .game-card .card-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: #fa7c14;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.3rem 0.7rem;
            border-radius: 2rem;
            letter-spacing: 0.02em;
            z-index: 2;
        }

        /* 按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.8rem 2rem;
            background: #2550ec;
            color: #ffffff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 2.5rem;
            border: none;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(37, 80, 236, 0.30);
            white-space: nowrap;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: #1d3fd9;
            box-shadow: 0 6px 24px rgba(37, 80, 236, 0.42);
            transform: translateY(-1px);
            color: #ffffff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(37, 80, 236, 0.28);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.75rem 1.8rem;
            background: transparent;
            color: #ffffff;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 2.5rem;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
            color: #ffffff;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            padding: 0.8rem 2rem;
            background: #fa7c14;
            color: #ffffff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 2.5rem;
            border: none;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(250, 124, 20, 0.32);
            white-space: nowrap;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-accent:hover {
            background: #e6600a;
            box-shadow: 0 6px 24px rgba(250, 124, 20, 0.44);
            transform: translateY(-1px);
            color: #ffffff;
        }

        /* 步骤流程 */
        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1.5rem;
            background: #ffffff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-soft);
            border: 1px solid #f1f5f9;
            transition: all var(--transition-base);
        }

        .step-item:hover {
            box-shadow: var(--shadow-card);
            border-color: #e2e8f0;
        }

        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #2550ec;
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

        /* FAQ */
        .faq-item {
            background: #ffffff;
            border-radius: var(--radius-xl);
            padding: 1.5rem;
            box-shadow: var(--shadow-soft);
            border: 1px solid #f1f5f9;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card);
            border-color: #e2e8f0;
        }

        .faq-item summary {
            font-weight: 600;
            font-size: 1rem;
            color: #1e293b;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item .faq-arrow {
            flex-shrink: 0;
            transition: transform var(--transition-base);
            color: #64748b;
            font-size: 1.2rem;
        }

        .faq-item[open] .faq-arrow {
            transform: rotate(180deg);
            color: #2550ec;
        }

        .faq-item .faq-answer {
            margin-top: 0.9rem;
            color: #475569;
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* CTA区块 */
        .cta-section {
            background: linear-gradient(145deg, #1a2d6b 0%, #1e3990 50%, #1d3fd9 100%);
            border-radius: var(--radius-3xl);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        /* Footer链接 */
        footer a {
            transition: color var(--transition-base);
        }

        footer a:hover {
            color: #2550ec !important;
        }

        /* 响应式调整 */
        @media (max-width: 640px) {
            .hero-section {
                min-height: 440px;
                text-align: center;
            }
            .hero-section .btn-row {
                justify-content: center;
                flex-wrap: wrap;
            }
            .section-padding {
                padding: 3rem 1rem;
            }
            .feature-card {
                padding: 1.5rem 1.2rem;
            }
            .game-card .card-img-wrap {
                aspect-ratio: 4 / 3;
            }
            .btn-primary,
            .btn-accent {
                padding: 0.7rem 1.5rem;
                font-size: 0.9rem;
            }
            .step-item {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 480px) {
            .nav-brand {
                font-size: 0.95rem;
            }
            .hero-section {
                min-height: 380px;
            }
            .hero-section h1 {
                font-size: 1.6rem !important;
            }
            .cta-section {
                border-radius: var(--radius-2xl);
                padding: 2rem 1.2rem !important;
            }
        }

/* roulang page: article */
:root {
            --brand-500: #6366f1;
            --brand-600: #5252db;
            --brand-700: #4242bf;
            --accent-500: #f97316;
            --accent-600: #ea580c;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888a8;
            --bg-page: #f8f9fc;
            --bg-card: #ffffff;
            --border-light: #e8e8f0;
            --border-strong: #d0d0e0;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        /* ---------- 导航胶囊 ---------- */
        .nav-capsule {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(200, 200, 220, 0.35);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }

        .nav-capsule:hover {
            box-shadow: var(--shadow-lg);
            background: rgba(255, 255, 255, 0.94);
        }

        .nav-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--brand-600);
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: color 0.2s ease;
            border-radius: var(--radius-sm);
        }

        .nav-brand:hover {
            color: var(--brand-700);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand-600);
            background: rgba(99, 102, 241, 0.07);
        }

        .nav-link.active {
            color: #ffffff;
            background: var(--brand-500);
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(99, 102, 241, 0.35);
        }

        .nav-link.active:hover {
            background: var(--brand-600);
            color: #ffffff;
        }

        .nav-desktop-links {
            display: none;
            gap: 0.25rem;
        }

        @media (min-width: 768px) {
            .nav-desktop-links {
                display: flex;
            }
            .mobile-menu-trigger {
                display: none !important;
            }
        }

        /* ---------- 移动端菜单 ---------- */
        .mobile-menu-trigger {
            display: flex;
        }

        @media (min-width: 768px) {
            .mobile-menu-trigger {
                display: none;
            }
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: 16px;
            right: 16px;
            background: #ffffff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            padding: 0.75rem 0.5rem;
            z-index: 100;
            flex-direction: column;
            border: 1px solid var(--border-light);
            animation: fadeSlideIn 0.25s ease;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            display: block;
            text-align: center;
            padding: 0.85rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 1rem;
        }

        @keyframes fadeSlideIn {
            from {
                opacity: 0;
                transform: translateY(-8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ---------- 面包屑 ---------- */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            padding: 0.75rem 0;
        }

        .breadcrumb a {
            color: var(--brand-500);
            font-weight: 500;
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--brand-700);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .breadcrumb .separator {
            color: #c0c0d0;
            user-select: none;
            font-size: 0.75rem;
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        @media (max-width: 520px) {
            .breadcrumb .current {
                max-width: 140px;
            }
        }

        .breadcrumb .breadcrumb-tag {
            display: inline-block;
            padding: 0.15rem 0.65rem;
            border-radius: 9999px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(99, 102, 241, 0.08);
            color: var(--brand-600);
        }

        /* ---------- 文章 Banner ---------- */
        .article-banner {
            position: relative;
            min-height: 200px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: linear-gradient(135deg, #3b3b8a 0%, #5252c8 40%, #6366f1 100%);
            display: flex;
            align-items: flex-end;
            padding: 1.5rem 2rem;
            margin-bottom: -20px;
            z-index: 1;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }

        .article-banner .banner-overlay {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        @media (max-width: 640px) {
            .article-banner {
                min-height: 150px;
                padding: 1rem 1.25rem;
                border-radius: var(--radius-md);
                margin-bottom: -16px;
            }
        }

        /* ---------- 文章主体卡片 ---------- */
        .article-card {
            position: relative;
            z-index: 2;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 2.5rem 2.5rem 3rem;
            margin-bottom: 2rem;
            border: 1px solid var(--border-light);
        }

        @media (max-width: 640px) {
            .article-card {
                padding: 1.5rem 1.25rem 2rem;
                border-radius: var(--radius-md);
            }
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1.25rem;
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        .article-meta .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.25rem 0.8rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(249, 115, 22, 0.08);
            color: var(--accent-600);
        }

        .article-meta .meta-date {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        .article-meta .meta-date svg {
            width: 15px;
            height: 15px;
            opacity: 0.6;
        }

        .article-h1 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin: 0 0 1.5rem 0;
            letter-spacing: -0.01em;
        }

        @media (max-width: 640px) {
            .article-h1 {
                font-size: 1.5rem;
                margin-bottom: 1rem;
            }
        }

        /* ---------- 文章正文排版 ---------- */
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
            word-break: break-word;
        }

        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 2.25rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-light);
            letter-spacing: -0.005em;
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 1.75rem 0 0.75rem;
        }

        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin: 1.5rem 0 0.6rem;
        }

        .article-body p {
            margin: 0 0 1.1rem;
        }

        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 1.5rem auto;
            box-shadow: var(--shadow-sm);
        }

        .article-body figure {
            margin: 1.5rem 0;
            text-align: center;
        }

        .article-body figcaption {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.5rem;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 1.25rem;
            padding-left: 1.6rem;
        }

        .article-body li {
            margin-bottom: 0.4rem;
        }

        .article-body ul li::marker {
            color: var(--brand-500);
        }

        .article-body blockquote {
            margin: 1.5rem 0;
            padding: 1rem 1.5rem;
            border-left: 4px solid var(--brand-500);
            background: rgba(99, 102, 241, 0.03);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-body blockquote p {
            margin: 0;
        }

        .article-body code {
            font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
            font-size: 0.9em;
            background: rgba(99, 102, 241, 0.06);
            padding: 0.15em 0.4em;
            border-radius: 4px;
            color: var(--brand-700);
        }

        .article-body pre {
            background: #1a1a2e;
            color: #e0e0f0;
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.5rem 0;
        }

        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
            border-radius: 0;
            font-size: inherit;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .article-body table th,
        .article-body table td {
            padding: 0.7rem 1rem;
            border: 1px solid var(--border-light);
            text-align: left;
        }

        .article-body table th {
            background: rgba(99, 102, 241, 0.06);
            font-weight: 600;
            color: var(--text-primary);
        }

        .article-body table tr:nth-child(even) td {
            background: rgba(248, 249, 252, 0.6);
        }

        .article-body a {
            color: var(--brand-500);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-thickness: 1px;
        }

        .article-body a:hover {
            color: var(--brand-700);
        }

        .article-body iframe {
            max-width: 100%;
            border-radius: var(--radius-md);
            margin: 1.25rem 0;
        }

        .article-body hr {
            border: none;
            border-top: 1px solid var(--border-light);
            margin: 2rem 0;
        }

        /* ---------- 文章底部分隔 ---------- */
        .article-footer-bar {
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .article-footer-bar .back-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--brand-500);
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            transition: all 0.22s ease;
        }

        .article-footer-bar .back-link:hover {
            background: rgba(99, 102, 241, 0.07);
            color: var(--brand-700);
        }

        /* ---------- 无内容状态 ---------- */
        .not-found-area {
            text-align: center;
            padding: 3rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .not-found-area::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/coverpic/cover-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.06;
            pointer-events: none;
        }

        .not-found-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 1.5rem;
            background: rgba(99, 102, 241, 0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 2;
        }

        .not-found-area h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            position: relative;
            z-index: 2;
        }

        .not-found-area p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 2;
        }

        /* ---------- 页脚 ---------- */
        footer a:hover {
            color: #4242bf !important;
        }

        /* ---------- 响应式微调 ---------- */
        @media (max-width: 768px) {
            .article-body {
                font-size: 1rem;
                line-height: 1.75;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.15rem;
            }
        }

/* roulang page: category3 */
:root {
            --brand-600: #e52a15;
            --brand-700: #c11f0d;
            --brand-50: #fef3f2;
            --accent-500: #f98507;
            --accent-400: #ffa620;
            --surface-light: #fafbfc;
            --text-primary: #111827;
            --text-secondary: #4b5563;
            --text-muted: #9ca3af;
            --border-light: #e5e7eb;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 10px -4px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 40px -5px rgba(0, 0, 0, 0.1), 0 8px 16px -6px rgba(0, 0, 0, 0.06);
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            background: #fafbfc;
            color: #111827;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        button {
            outline: none;
        }

        /* 导航胶囊 */
        .nav-capsule {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: 3rem;
            border: 1px solid rgba(229, 231, 235, 0.7);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
            transition: box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .nav-capsule:hover {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1), 0 1px 4px rgba(0, 0, 0, 0.06);
            border-color: rgba(209, 213, 219, 0.9);
        }

        .nav-brand {
            font-weight: 700;
            font-size: 1.125rem;
            letter-spacing: -0.01em;
            color: #111827;
            white-space: nowrap;
            transition: color 0.2s;
            background: linear-gradient(135deg, #c11f0d 0%, #e52a15 60%, #f84430 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-brand:hover {
            opacity: 0.85;
        }

        .nav-desktop-links {
            display: flex;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.1rem;
            border-radius: 2rem;
            font-size: 0.925rem;
            font-weight: 500;
            color: #4b5563;
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: #111827;
            background: rgba(243, 244, 246, 0.8);
        }

        .nav-link.active {
            color: #ffffff;
            background: linear-gradient(135deg, #e52a15 0%, #c11f0d 100%);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(197, 31, 13, 0.3);
        }

        .nav-link.active:hover {
            background: linear-gradient(135deg, #c11f0d 0%, #a01c0f 100%);
            color: #ffffff;
        }

        /* 移动端菜单触发器 */
        .mobile-menu-trigger {
            display: none;
            border: none;
            background: #f3f4f6;
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: calc(100% + 0.75rem);
            left: 1rem;
            right: 1rem;
            background: #ffffff;
            border-radius: 1.25rem;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
            padding: 0.75rem;
            z-index: 60;
            border: 1px solid #e5e7eb;
            flex-direction: column;
            gap: 0.25rem;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            padding: 0.85rem 1.25rem;
            border-radius: 0.85rem;
            font-size: 1rem;
            text-align: center;
            width: 100%;
        }

        /* Hero */
        .hero-section {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            min-height: 520px;
            display: flex;
            align-items: center;
            isolation: isolate;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(17, 24, 39, 0.82) 0%, rgba(31, 41, 55, 0.65) 40%, rgba(0, 0, 0, 0.5) 100%);
            z-index: 1;
        }

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

        /* 特权卡片 */
        .privilege-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.35s ease;
            overflow: hidden;
        }

        .privilege-card:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-4px);
            border-color: #fecaca;
        }

        .privilege-card .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        /* 等级卡片 */
        .tier-card {
            background: #ffffff;
            border-radius: var(--radius-2xl);
            border: 2px solid #e5e7eb;
            padding: 2rem 1.5rem;
            transition: all 0.35s ease;
            position: relative;
            text-align: center;
        }

        .tier-card.featured {
            border-color: #fca5a5;
            background: linear-gradient(180deg, #fff5f5 0%, #ffffff 40%);
            box-shadow: 0 8px 30px rgba(229, 42, 21, 0.12);
            transform: scale(1.03);
        }

        .tier-card:hover {
            border-color: #f87171;
            box-shadow: var(--shadow-xl);
        }

        .tier-badge {
            display: inline-block;
            padding: 0.35rem 1rem;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        /* FAQ */
        .faq-item {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid #e5e7eb;
            padding: 1.25rem 1.5rem;
            transition: all 0.25s ease;
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: #fecaca;
            box-shadow: var(--shadow-md);
        }

        .faq-item summary {
            font-weight: 600;
            font-size: 1.05rem;
            color: #111827;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            font-size: 1.4rem;
            font-weight: 300;
            color: #9ca3af;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            content: '−';
            color: #e52a15;
        }

        .faq-item .faq-answer {
            margin-top: 0.75rem;
            color: #4b5563;
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1f2937 0%, #111827 50%, #0f172a 100%);
            border-radius: var(--radius-2xl);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(248, 68, 48, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .btn-brand {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2rem;
            border-radius: 3rem;
            font-weight: 600;
            font-size: 1rem;
            background: linear-gradient(135deg, #f84430 0%, #e52a15 100%);
            color: #ffffff;
            border: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(229, 42, 21, 0.35);
            letter-spacing: 0.01em;
        }

        .btn-brand:hover {
            background: linear-gradient(135deg, #e52a15 0%, #c11f0d 100%);
            box-shadow: 0 6px 24px rgba(197, 31, 13, 0.45);
            transform: translateY(-2px);
        }

        .btn-brand:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(197, 31, 13, 0.3);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.8rem;
            border-radius: 3rem;
            font-weight: 600;
            font-size: 0.95rem;
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all 0.3s ease;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
        }

        /* 统计数字 */
        .stat-block {
            text-align: center;
            padding: 1.5rem;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #e52a15 0%, #f84430 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        /* 步骤 */
        .step-indicator {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, #e52a15 0%, #c11f0d 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.15rem;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(197, 31, 13, 0.3);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-section {
                min-height: 420px;
            }
            .tier-card.featured {
                transform: scale(1);
            }
        }

        @media (max-width: 768px) {
            .nav-desktop-links {
                display: none;
            }
            .mobile-menu-trigger {
                display: flex;
            }
            .hero-section {
                min-height: 360px;
                text-align: center;
            }
            .hero-content {
                padding: 2rem 1rem;
            }
            .stat-number {
                font-size: 2rem;
            }
            .privilege-card {
                padding: 1.25rem;
            }
            .tier-card {
                padding: 1.5rem 1rem;
            }
            .tier-card.featured {
                transform: scale(1);
            }
            .cta-section {
                border-radius: 1rem;
                padding: 2rem 1.25rem;
            }
        }

        @media (max-width: 520px) {
            .nav-capsule {
                border-radius: 2rem;
                padding-left: 0.75rem;
                padding-right: 0.75rem;
            }
            .nav-brand {
                font-size: 0.95rem;
            }
            .hero-section {
                min-height: 300px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .btn-brand,
            .btn-outline-light {
                width: 100%;
                justify-content: center;
                padding: 0.75rem 1.5rem;
                font-size: 0.9rem;
            }
            .faq-item {
                padding: 1rem 1.15rem;
            }
            .faq-item summary {
                font-size: 0.95rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
        }

/* roulang page: category2 */
:root {
            --color-brand: #f25520;
            --color-brand-hover: #e03d0e;
            --color-brand-light: #fef3ee;
            --color-accent: #7c3aed;
            --color-accent-light: #f5f3ff;
            --color-surface-dark: #171717;
            --color-surface-mid: #525252;
            --color-surface-light: #a3a3a3;
            --color-border: #e8e8e8;
            --color-bg: #fafafa;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
            --radius-full: 9999px;
            --shadow-soft: 0 2px 16px rgba(0, 0, 0, 0.06);
            --shadow-medium: 0 4px 24px rgba(0, 0, 0, 0.09);
            --shadow-lift: 0 8px 32px rgba(0, 0, 0, 0.12);
            --transition-fast: 180ms ease;
            --transition-smooth: 280ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: #262626;
            background-color: #fafafa;
            min-height: 100vh;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(242, 85, 32, 0.5);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* 导航胶囊 */
        .nav-capsule {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(232, 232, 232, 0.7);
            border-radius: var(--radius-full);
            box-shadow: var(--shadow-soft);
            transition: box-shadow var(--transition-smooth), background var(--transition-smooth);
        }
        .nav-capsule:hover {
            box-shadow: var(--shadow-medium);
            background: rgba(255, 255, 255, 0.94);
        }
        .nav-brand {
            font-weight: 700;
            font-size: 1.15rem;
            color: #171717;
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: color var(--transition-fast);
            border-radius: var(--radius-sm);
        }
        .nav-brand:hover {
            color: var(--color-brand);
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.925rem;
            font-weight: 500;
            color: #525252;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: #171717;
            background: #f5f5f5;
        }
        .nav-link.active {
            color: #ffffff;
            background: var(--color-brand);
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(242, 85, 32, 0.3);
        }
        .nav-link.active:hover {
            background: var(--color-brand-hover);
            color: #ffffff;
        }
        .nav-desktop-links {
            display: flex;
        }

        /* 移动端菜单 */
        .mobile-menu-trigger {
            display: none;
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: 16px;
            right: 16px;
            background: #ffffff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-lift);
            padding: 8px 0;
            z-index: 60;
            flex-direction: column;
            border: 1px solid var(--color-border);
            animation: menuIn 0.22s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            display: block;
            text-align: center;
            padding: 0.75rem 1.5rem;
            border-radius: 0;
            font-size: 1rem;
            margin: 2px 8px;
            border-radius: var(--radius-md);
        }
        .mobile-menu .nav-link.active {
            border-radius: var(--radius-md);
            margin: 2px 8px;
        }

        @keyframes menuIn {
            from {
                opacity: 0;
                transform: translateY(-12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Hero区域 */
        .hero-section {
            position: relative;
            overflow: hidden;
            background: linear-gradient(160deg, #1a1a2e 0%, #16213e 40%, #0f3460 100%);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 65% 50%, rgba(242, 85, 32, 0.18) 0%, transparent 60%),
                radial-gradient(ellipse at 30% 70%, rgba(124, 58, 237, 0.12) 0%, transparent 55%);
            pointer-events: none;
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.3;
            mix-blend-mode: overlay;
            pointer-events: none;
        }

        /* 卡片 */
        .guide-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-soft);
        }
        .guide-card:hover {
            box-shadow: var(--shadow-lift);
            transform: translateY(-4px);
            border-color: #d6d6d6;
        }
        .guide-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #f5f5f5;
        }
        .guide-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .guide-card:hover .guide-card-img-wrap img {
            transform: scale(1.06);
        }

        /* 流程步骤 */
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-full);
            background: var(--color-brand);
            color: #ffffff;
            font-weight: 700;
            font-size: 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 14px rgba(242, 85, 32, 0.3);
        }
        .step-connector {
            width: 2px;
            height: 32px;
            background: linear-gradient(to bottom, #f25520, #e8e8e8);
            margin: 0 auto;
            border-radius: 1px;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            background: #ffffff;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: #d6d6d6;
            box-shadow: var(--shadow-soft);
        }
        .faq-question {
            cursor: pointer;
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            color: #171717;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            user-select: none;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-brand);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 1.5rem;
            color: #525252;
            line-height: 1.75;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem 1.5rem;
        }
        .faq-item.open .faq-question {
            color: var(--color-brand);
        }
        .faq-icon {
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            flex-shrink: 0;
            color: #a3a3a3;
            font-size: 0.85rem;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--color-brand);
        }

        /* 标签/badge */
        .badge-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.3rem 0.75rem;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .badge-hot {
            background: #fef3ee;
            color: #e03d0e;
        }
        .badge-new {
            background: #f5f3ff;
            color: #6d28d9;
        }
        .badge-popular {
            background: #f0fdf4;
            color: #15803d;
        }

        /* CTA区域 */
        .cta-section {
            background: linear-gradient(150deg, #1a1a2e 0%, #16213e 50%, #1a1a2e 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(242, 85, 32, 0.2) 0%, transparent 55%),
                radial-gradient(ellipse at 30% 70%, rgba(124, 58, 237, 0.12) 0%, transparent 50%);
            pointer-events: none;
        }

        /* 自定义滚动条 */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: #f5f5f5;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb {
            background: #d6d6d6;
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #a3a3a3;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-desktop-links {
                gap: 0;
            }
            .nav-link {
                padding: 0.4rem 0.7rem;
                font-size: 0.85rem;
            }
            .nav-brand {
                font-size: 1.05rem;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop-links {
                display: none;
            }
            .mobile-menu-trigger {
                display: flex;
            }
            .nav-capsule {
                border-radius: var(--radius-xl);
            }
            .hero-section {
                min-height: auto;
                padding: 3rem 0 2.5rem 0;
            }
            .guide-card-img-wrap {
                aspect-ratio: 16 / 9;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
            .step-connector {
                height: 20px;
            }
        }

        @media (max-width: 520px) {
            .nav-capsule {
                padding: 0.5rem 0.75rem;
            }
            .nav-brand {
                font-size: 0.95rem;
            }
            .mobile-menu-trigger {
                width: 38px;
                height: 38px;
            }
            .mobile-menu {
                left: 8px;
                right: 8px;
                border-radius: var(--radius-lg);
            }
            .guide-card {
                border-radius: var(--radius-lg);
            }
            .faq-question {
                padding: 1rem 1.25rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 1.25rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 1.25rem 1rem 1.25rem;
            }
        }