/* roulang page: index */
:root {
            --dark-navy: #0A1320;
            --dark-panel: #111D30;
            --light-bg: #F5F8FC;
            --white-top: #FFFFFF;
            --ice-blue: #00D4FF;
            --lake-blue: #1677FF;
            --gold: #F2B64C;
            --text-dark-main: #EAF2FA;
            --text-dark-body: #A8B6C6;
            --text-light-main: #10233B;
            --text-light-body: #4B5A6C;
            --text-muted: #8A99AA;
            --radius-card: 18px;
            --radius-btn: 999px;
            --card-shadow: 0 6px 20px rgba(16, 55, 92, 0.08);
            --dark-glow: 0 0 0 4px rgba(0,212,255,0.15), 0 0 24px rgba(0,212,255,0.3);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background-color: var(--light-bg);
            color: var(--text-light-body);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        
        img {
            max-width: 100%;
            display: block;
            object-fit: cover;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }
        
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 88px;
            padding-bottom: 88px;
        }

        .glass {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.12);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            padding: 0 28px;
            height: 48px;
            font-size: 15px;
            white-space: nowrap;
            outline: none;
        }

        .btn:focus-visible {
            box-shadow: 0 0 0 2px var(--ice-blue);
            outline: none;
        }

        .btn:active {
            filter: brightness(0.88);
            transform: translateY(0);
        }

        .btn-primary {
            background: linear-gradient(90deg, #1677FF, #00D4FF);
            color: #fff !important;
            box-shadow: 0 4px 14px rgba(22, 119, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 212, 255, 0.35);
        }

        .btn-ghost-dark {
            background: transparent;
            color: var(--text-dark-main);
            border: 1px solid rgba(234, 242, 250, 0.4);
        }

        .btn-ghost-dark:hover {
            border-color: var(--ice-blue);
            color: var(--ice-blue);
            background: rgba(0, 212, 255, 0.08);
        }

        .card-badge, .tag-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .tag-blue {
            background: rgba(22, 119, 255, 0.1);
            color: #1677FF;
            border: 1px solid rgba(22, 119, 255, 0.25);
        }

        .tag-gold {
            background: rgba(242, 182, 76, 0.1);
            color: #B8860B;
            border: 1px solid rgba(242, 182, 76, 0.3);
        }

        .tag-cyan {
            background: rgba(0, 212, 255, 0.08);
            color: #1596B5;
            border: 1px solid rgba(0, 212, 255, 0.25);
        }

        .hero-bg {
            background: linear-gradient(105deg, #0A1320 30%, #0D1B2D 60%, #112A40 100%);
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }

        .hero-bg::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 65%;
            height: 90%;
            background: url('/assets/images/backpic/back-1.webp') no-repeat right center / cover;
            opacity: 0.30;
            filter: blur(2px);
            -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.8), transparent 80%);
            mask-image: linear-gradient(to left, rgba(0,0,0,0.8), transparent 80%);
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -50px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(0, 173, 239, 0.15);
            filter: blur(90px);
        }

        .bg-grid {
            background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 32px 32px;
        }

        .content-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(20, 70, 110, 0.06);
            transition: all 0.35s ease;
        }

        .content-card:hover {
            border-color: rgba(0, 212, 255, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(0, 80, 180, 0.1);
        }

        .table-container {
            background: linear-gradient(145deg, rgba(13, 27, 45, 0.98), rgba(7, 16, 28, 1));
            border-radius: 22px;
            overflow: hidden;
        }

        .section-title {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-light-main);
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-title-dark {
            color: var(--text-dark-main);
        }

        .card-stat {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -0.03em;
            font-variant-numeric: tabular-nums;
        }

        .faq-item {
            border: 1px solid rgba(20, 70, 110, 0.1);
            border-radius: 16px;
            background: #fff;
            transition: border-color 0.3s ease;
            overflow: hidden;
        }

        .faq-item[data-open="true"] {
            border-color: rgba(22, 119, 255, 0.3);
            box-shadow: 0 6px 20px rgba(22, 119, 255, 0.08);
        }

        .footer-bg {
            background: #07101A;
            color: #819AAB;
        }

        .footer-title {
            color: var(--text-dark-main);
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .footer-links a {
            font-size: 14px;
            color: #748B9E;
            transition: color 0.2s ease;
        }

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

        .nav-link {
            font-weight: 500;
            color: var(--text-light-body);
            position: relative;
            padding: 8px 2px;
            transition: color 0.25s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(to right, var(--lake-blue), var(--ice-blue));
            transition: width 0.3s ease;
        }

        .nav-link:hover {
            color: var(--text-light-main);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--lake-blue);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
        }

        .mobile-drawer {
            position: relative;
            z-index: 999;
        }

        .lock-card::after {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(to bottom, rgba(255,255,255,0.02) 0%, rgba(245,248,252,0.92) 75%, #FFFFFF 100%);
            border-radius: var(--radius-card);
        }

        .compare-row-item:not(:last-child) {
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .road-bg {
            background-color: #0B1623;
            position: relative;
        }

        .road-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.08), transparent 50%),
                radial-gradient(circle at 20% 80%, rgba(22, 119, 255, 0.06), transparent 40%);
            pointer-events: none;
        }

        .cta-bg {
            background: linear-gradient(110deg, rgba(10, 19, 32, 0.95) 0%, rgba(13, 28, 46, 0.9) 100%), 
                url('/assets/images/backpic/back-2.png') no-repeat center/cover;
            box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.1);
        }

        .radius-card {
            border-radius: 18px;
        }

        .blur-text {
            filter: blur(4px);
            user-select: none;
        }

        .faq-answer {
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding-left: 24px;
            padding-right: 24px;
        }

        .locker-hint {
            position: absolute;
            top: 0; left: 24px; right: 24px;
            height: 100%;
            display: flex;
            justify-content: flex-end;
            align-items: center;
            z-index: 2;
        }

        .cover-hover-parent .cover-hover-img {
            transition: transform 0.4s ease;
        }

        .cover-hover-parent:hover .cover-hover-img {
            transform: scale(1.05);
        }

        /* 移动端自适应 */
        @media (max-width: 768px) {
            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .section-title {
                font-size: 25px;
                line-height: 1.35;
            }
            .hero-title {
                font-size: 30px;
                line-height: 1.25;
            }
            .card-stat {
                font-size: 28px;
            }
            .btn {
                min-height: 44px;
                padding: 0 18px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 22px;
            }
        }

        /* 焦点边界 */
        a:focus-visible, button:focus-visible {
            outline: none;
            box-shadow: 0 0 0 2px var(--ice-blue);
        }

        imga {
            alt: '';
        }

/* roulang page: category1 */
:root {
            --ink-deep: #0A1320;
            --ink-panel: #111D30;
            --bg-light: #F5F8FC;
            --panel-white: #FFFFFF;
            --blue-deep: #1677FF;
            --blue-ice: #00D4FF;
            --gold: #F2B64C;
            --text-primary: #10233B;
            --text-secondary: #4B5A6C;
            --text-muted: #8A99AA;
            --text-on-dark: #EAF2FA;
            --text-on-dark-muted: #A8B6C6;
            --border-light: rgba(16, 35, 59, .08);
            --shadow-soft: 0 12px 30px rgba(16, 35, 59, .06), 0 2px 8px rgba(16, 35, 59, .03);
            --shadow-lift: 0 18px 50px rgba(16, 35, 59, .12);
            --radius-lg: 18px;
            --radius-xl: 22px;
            --font-base: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-base);
            background: var(--bg-light);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4 {
            font-weight: 800;
            line-height: 1.3;
            margin: 0;
        }

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

        img {
            max-width: 100%;
            vertical-align: middle;
        }

        button, input {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1200px !important;
            margin-left: auto !important;
            margin-right: auto !important;
            padding-left: 16px !important;
            padding-right: 16px !important;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            font-weight: 700;
            line-height: 1.2;
            border: 1px solid transparent;
            cursor: pointer;
            transition: transform .22s ease, box-shadow .22s ease, background .22s ease, color .22s ease, border-color .22s ease;
            min-height: 44px;
            padding: 0 22px;
            font-size: 14px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #1677FF, #00D4FF);
            color: #fff;
            box-shadow: 0 8px 24px rgba(22, 119, 255, .24);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 0 4px rgba(0, 212, 255, .15), 0 0 24px rgba(0, 212, 255, .3), 0 10px 30px rgba(22, 119, 255, .28);
        }

        .btn-primary:active {
            filter: brightness(.9);
            transform: translateY(0);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, .08);
            border-color: rgba(255, 255, 255, .22);
            color: #fff;
            backdrop-filter: blur(6px);
        }

        .btn-ghost:hover {
            border-color: rgba(0, 212, 255, .6);
            color: #EAF2FA;
            transform: translateY(-2px);
        }

        .btn-ghost:active {
            filter: brightness(.88);
            transform: translateY(0);
        }

        a:focus-visible,
        button:focus-visible,
        .header-search:focus-within {
            outline: 2px solid var(--blue-ice);
            outline-offset: 2px;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            min-height: 44px;
            font-weight: 500;
            font-size: 14px;
            color: #4B5A6C;
            letter-spacing: .02em;
            transition: color .2s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 4px;
            height: 2px;
            background: linear-gradient(90deg, var(--blue-deep), var(--blue-ice));
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(.5);
            transition: opacity .2s ease, transform .2s ease;
        }

        .nav-link:hover {
            color: #10233B;
        }

        .nav-link.active {
            color: #10233B;
            font-weight: 800;
        }

        .nav-link.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .glass-card {
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .18);
            backdrop-filter: blur(14px);
            border-radius: 22px;
            box-shadow: 0 18px 50px rgba(0, 0, 0, .24);
        }

        .badge-gold {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-radius: 999px;
            background: rgba(242, 182, 76, .14);
            border: 1px solid rgba(242, 182, 76, .5);
            color: #F7C878;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: .08em;
            padding: 6px 14px;
        }

        .badge-blue {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-radius: 999px;
            background: rgba(22, 119, 255, .1);
            color: #1677FF;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 14px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid rgba(16, 35, 59, .07);
            border-radius: 20px;
            padding: 28px;
            box-shadow: var(--shadow-soft);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 212, 255, .45);
            box-shadow: var(--shadow-lift);
        }

        .step-card {
            background: rgba(255, 255, 255, .055);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 20px;
            padding: 22px;
            transition: border-color .25s ease, background .25s ease, transform .25s ease;
        }

        .step-card:hover {
            border-color: rgba(0, 212, 255, .55);
            background: rgba(255, 255, 255, .09);
            transform: translateY(-2px);
        }

        .dark-panel {
            background-color: var(--ink-deep);
            background-image: radial-gradient(circle at 85% 15%, rgba(22, 119, 255, .22), transparent 46%), radial-gradient(circle at 8% 90%, rgba(0, 212, 255, .1), transparent 42%);
        }

        .footer-bg {
            background-color: #081120;
            background-image: linear-gradient(180deg, rgba(10, 19, 32, 0), rgba(10, 19, 32, .6));
        }

        .footer-title {
            color: #D7E2EC;
            font-weight: 800;
            letter-spacing: .1em;
        }

        .footer-links a {
            color: #748B9E;
            font-size: 14px;
            transition: color .2s ease, padding-left .2s ease;
        }

        .footer-links a:hover {
            color: #00D4FF;
            padding-left: 4px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid rgba(16, 35, 59, .07);
            border-radius: 18px;
            padding: 20px 22px;
            box-shadow: 0 6px 20px rgba(16, 35, 59, .04);
            transition: border-color .25s ease, box-shadow .25s ease;
        }

        .faq-item.open {
            border-color: rgba(0, 212, 255, .45);
            box-shadow: 0 10px 34px rgba(16, 35, 59, .08);
        }

        .faq-answer {
            display: none;
            color: #4B5A6C;
            font-size: 14px;
            line-height: 1.85;
        }

        .faq-answer p {
            margin: 0;
        }

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

        .faq-icon {
            transition: transform .3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .cover-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }

        .cover-wrap {
            overflow: hidden;
        }

        .scene-card:hover .cover-image {
            transform: scale(1.04);
        }

        .btn[disabled] {
            opacity: .55;
            pointer-events: none;
            box-shadow: none;
        }

        @media (max-width: 767px) {
            .nav-mobile {
                padding: 12px 16px;
            }

            .nav-mobile a {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 12px 6px;
                border-radius: 10px;
                font-size: 16px;
                font-weight: 600;
                color: #10233B;
            }

            .nav-mobile a.active {
                color: #1677FF;
                background: rgba(22, 119, 255, .06);
            }
        }

/* roulang page: article */
:root {
            --bg-deep: #0A1320;
            --bg-panel: #111D30;
            --bg-soft: #F5F8FC;
            --bg-card: #FFFFFF;
            --text-head: #10233B;
            --text-body: #4B5A6C;
            --text-muted: #8A99AA;
            --brand-blue: #1677FF;
            --brand-cyan: #00D4FF;
            --brand-gold: #F2B64C;
            --border-soft: rgba(16, 35, 59, 0.1);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(15, 40, 80, 0.06);
            --shadow-glow: 0 0 24px rgba(0, 212, 255, 0.32);
            --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-main);
            background: var(--bg-soft);
            color: var(--text-body);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

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

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

        button,
        input {
            font-family: inherit;
        }

        button:focus-visible,
        input:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--brand-cyan);
            outline-offset: 3px;
            border-radius: 6px;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 16px;
            padding-right: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 20px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all 0.22s ease;
            box-shadow: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, #1677FF 0%, #00D4FF 100%);
            color: #ffffff;
            box-shadow: 0 6px 18px rgba(22, 119, 255, 0.24);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.14), 0 0 24px rgba(0, 212, 255, 0.32);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.92);
            box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.1);
        }

        .btn-primary:disabled {
            opacity: 0.55;
            transform: none;
            box-shadow: none;
            cursor: not-allowed;
        }

        .btn-outline {
            background: #ffffff;
            border: 1px solid rgba(16, 35, 59, 0.13);
            color: var(--text-head);
            box-shadow: 0 2px 10px rgba(16, 35, 59, 0.03);
        }

        .btn-outline:hover {
            border-color: rgba(22, 119, 255, 0.5);
            color: var(--brand-blue);
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(16, 35, 59, 0.07);
        }

        .btn-outline:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        .nav-link {
            position: relative;
            color: #4B5A6C;
            font-size: 14px;
            font-weight: 500;
            line-height: 1;
            padding: 8px 0;
            transition: color 0.2s ease;
            letter-spacing: 0.2px;
        }

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

        .nav-link.active {
            color: var(--brand-blue);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -4px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, #1677FF, #00D4FF);
        }

        .mobile-nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 13px 6px;
            border-radius: 12px;
            color: #10233B;
            font-size: 15px;
            font-weight: 500;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .mobile-nav-link:hover {
            background: #F1F7FE;
            color: #1677FF;
        }

        .footer-bg {
            background-color: #070F1A;
            background-image: radial-gradient(circle at 85% 10%, rgba(0, 212, 255, 0.1), transparent 30%), radial-gradient(circle at 10% 90%, rgba(22, 119, 255, 0.08), transparent 24%);
        }

        .footer-links a {
            color: rgba(168, 182, 198, 0.78);
            font-size: 13px;
            font-weight: 400;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-links a:hover {
            color: #00D4FF;
            padding-left: 4px;
        }

        .footer-safe li {
            color: rgba(201, 214, 228, 0.68);
            font-size: 12.5px;
            line-height: 1.7;
            display: flex;
            gap: 8px;
            align-items: flex-start;
        }

        .footer-safe li i {
            color: #00D4FF;
            margin-top: 3px;
            font-size: 11px;
            width: 14px;
            text-align: center;
            flex-shrink: 0;
        }

        .footer-title {
            color: #e6eef7;
            font-size: 14px;
            font-weight: 600;
        }

        .breadcrumb-wrap {
            background: rgba(255, 255, 255, 0.92);
            border-bottom: 1px solid rgba(16, 35, 59, 0.07);
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: rgba(22, 119, 255, 0.08);
            border: 1px solid rgba(22, 119, 255, 0.14);
            color: #1677FF;
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            color: #8A99AA;
            font-size: 13px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: #1677FF;
            font-size: 13px;
            width: 16px;
            text-align: center;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: #4B5A6C;
            word-break: break-word;
        }

        .article-content > *:first-child {
            margin-top: 0;
        }

        .article-content p {
            margin: 0 0 1.6em;
            font-size: 16px;
            line-height: 1.85;
            color: #4B5A6C;
        }

        .article-content h2 {
            font-size: 26px;
            line-height: 1.4;
            font-weight: 700;
            color: #10233B;
            margin: 2.2em 0 0.8em;
            letter-spacing: -0.4px;
            padding-left: 16px;
            border-left: 4px solid #1677FF;
            border-radius: 2px;
        }

        .article-content h3 {
            font-size: 20px;
            line-height: 1.5;
            font-weight: 700;
            color: #10233B;
            margin: 1.9em 0 0.7em;
            letter-spacing: -0.2px;
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 700;
            color: #10233B;
            margin: 1.6em 0 0.5em;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.6em;
            padding-left: 1.4em;
        }

        .article-content li {
            margin: 0.5em 0;
            line-height: 1.8;
        }

        .article-content ul li {
            list-style: disc;
        }

        .article-content ol li {
            list-style: decimal;
        }

        .article-content img {
            border-radius: 20px;
            margin: 2em auto;
            max-width: 100%;
            height: auto;
            box-shadow: 0 12px 34px rgba(15, 40, 80, 0.14);
        }

        .article-content blockquote {
            margin: 2em 0;
            background: #F4F9FF;
            border: 1px solid rgba(22, 119, 255, 0.12);
            border-left: 4px solid #1677FF;
            border-radius: 14px;
            padding: 18px 22px;
            color: #33455A;
            font-size: 15px;
            line-height: 1.8;
        }

        .article-content blockquote p {
            margin: 0;
            color: #33455A;
        }

        .article-content a {
            color: #1677FF;
            border-bottom: 1px solid rgba(22, 119, 255, 0.25);
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .article-content a:hover {
            color: #00B4E5;
            border-bottom-color: #00B4E5;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 2em 0;
            border-radius: 14px;
            overflow: hidden;
            font-size: 14px;
        }

        .article-content th {
            background: #F1F7FE;
            color: #10233B;
            text-align: left;
            padding: 12px 16px;
            font-weight: 600;
            border: 1px solid #E1EBF8;
        }

        .article-content td {
            padding: 12px 16px;
            border: 1px solid #E8F0FA;
            color: #4B5A6C;
        }

        .article-content hr {
            border: none;
            height: 1px;
            background: #E8F0FA;
            margin: 2.6em 0;
        }

        .empty-state-icon {
            width: 76px;
            height: 76px;
            border-radius: 50%;
            background: #F1F7FE;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #1677FF;
            font-size: 28px;
            margin: 0 auto 22px;
            border: 1px solid rgba(22, 119, 255, 0.12);
        }

        .related-card {
            background: rgba(255, 255, 255, 0.055);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            overflow: hidden;
            transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
        }

        .related-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.5);
            background: rgba(255, 255, 255, 0.08);
        }

        .related-card img {
            transition: transform 0.5s ease;
        }

        .related-card:hover img {
            transform: scale(1.04);
        }

        .related-section {
            background-color: #0A1320;
            background-image: url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .related-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 19, 32, 0.88), rgba(10, 19, 32, 0.96));
            pointer-events: none;
        }

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

        @media (max-width: 640px) {
            .article-meta {
                gap: 12px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .article-content {
                font-size: 15px;
            }
        }

/* roulang page: category2 */
:root {
            --sea: #0A1320;
            --panel: #111D30;
            --cloud: #F5F8FC;
            --ink: #10233B;
            --body: #4B5A6C;
            --mute: #8A99AA;
            --accent: #1677FF;
            --cyan: #00D4FF;
            --gold: #F2B64C;
            --line: rgba(16, 35, 59, 0.08);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--cloud);
            color: var(--ink);
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            background: transparent;
        }

        button,
        input,
        select,
        textarea {
            font: inherit;
        }

        button {
            border: none;
            cursor: pointer;
            background: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 16px;
            padding-right: 16px;
        }

        :focus-visible {
            outline: 2px solid var(--cyan);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .nav-link {
            position: relative;
            font-size: 14.5px;
            font-weight: 600;
            color: var(--ink);
            padding: 6px 2px;
            transition: color 0.2s ease;
        }

        .nav-link:hover {
            color: var(--accent);
        }

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 3px;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--accent), var(--cyan));
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 14px;
            height: 46px;
            padding: 0 24px;
            border: 1px solid transparent;
            transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, opacity 0.2s ease;
        }

        .btn:active {
            transform: translateY(1px) scale(0.98);
            opacity: 0.9;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--cyan));
            color: #fff;
            box-shadow: 0 8px 24px rgba(22, 119, 255, 0.18);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.15), 0 0 24px rgba(0, 212, 255, 0.28);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.18);
            color: #eaf2fa;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-2px);
        }

        .btn-dark {
            background: #fff;
            color: var(--ink);
            border-color: #e8eef5;
        }

        .btn-dark:hover {
            box-shadow: 0 8px 24px rgba(16, 35, 59, 0.08);
            transform: translateY(-2px);
        }

        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(22, 119, 255, 0.08);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
        }

        .utility-card {
            background: #ffffff;
            border: 1px solid #e9eef5;
            border-radius: 18px;
            transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
        }

        .utility-card:hover {
            border-color: rgba(0, 212, 255, 0.6);
            box-shadow: 0 20px 36px rgba(16, 35, 59, 0.08);
            transform: translateY(-4px);
        }

        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: 16px;
            font-size: 18px;
            color: #fff;
            flex: 0 0 auto;
        }

        .footer-bg {
            background-color: #08101d;
            background-image: radial-gradient(circle at 15% 20%, rgba(0, 212, 255, 0.06) 0%, transparent 44%);
            color: #a8b6c6;
        }

        .footer-title {
            color: #dbe7f1;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-links a {
            color: #8a99aa;
            font-size: 13.5px;
            text-decoration: none;
            transition: color 0.2s ease, transform 0.2s ease;
        }

        .footer-links a:hover {
            color: #00d4ff;
        }

        .faq-card {
            background: #fff;
            border: 1px solid #e8eef5;
            border-radius: 18px;
            overflow: hidden;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .faq-card.is-open,
        .faq-card:hover {
            border-color: rgba(0, 212, 255, 0.45);
            box-shadow: 0 12px 30px rgba(16, 35, 59, 0.05);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            background: transparent;
        }

        .faq-icon {
            flex: 0 0 auto;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #eff4fa;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--accent);
            transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
        }

        .faq-card.is-open .faq-icon {
            transform: rotate(135deg);
            background: linear-gradient(135deg, var(--accent), var(--cyan));
            color: #fff;
        }

        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--body);
            line-height: 1.9;
        }

        .faq-card.is-open .faq-answer {
            display: block;
        }

        .timeline-line {
            position: relative;
        }

        @media (min-width: 1024px) {
            .timeline-line::before {
                content: "";
                position: absolute;
                left: 0;
                right: 0;
                top: 48px;
                height: 1px;
                background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.3), rgba(22, 119, 255, 0.3), transparent);
            }
        }