/* roulang page: index */
:root {
            --primary: #1B6FD8;
            --primary-dark: #1457b0;
            --accent: #00E0FF;
            --accent-green: #33F0A0;
            --orange: #FF7A2F;
            --dark: #0B1422;
            --dark-soft: #122036;
            --bg: #F5F8FC;
            --text: #223043;
            --muted: #5B6B83;
            --border: #E3EAF2;
            --radius: 14px;
            --radius-btn: 10px;
            --shadow: 0 8px 24px rgba(23, 42, 74, .08);
            --shadow-hover: 0 12px 32px rgba(23, 42, 74, .14);
            --glow: 0 0 12px rgba(0, 224, 255, .45);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --mono: "DIN Alternate", "Roboto Mono", "SFMono-Regular", Consolas, monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        .section {
            padding: 88px 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 52px;
        }

        .section-head .eyebrow {
            display: inline-block;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-head p {
            color: var(--muted);
            font-size: 16px;
            line-height: 1.7;
        }

        /* header */
        .site-header {
            background: var(--dark);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .3);
        }

        .header-inner {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 21px;
            font-weight: 800;
            letter-spacing: .5px;
            line-height: 1.2;
        }

        .logo .logo-sub {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            border: 1px solid rgba(0, 224, 255, .5);
            border-radius: 999px;
            padding: 2px 10px;
            background: rgba(0, 224, 255, .08);
        }

        .nav-menu {
            display: flex;
            gap: 32px;
        }

        .nav-menu a {
            color: #c6d4e3;
            font-size: 15px;
            font-weight: 500;
            padding: 10px 2px;
            position: relative;
            transition: color .25s ease, text-shadow .25s ease;
        }

        .nav-menu a:hover {
            color: #fff;
        }

        .nav-menu a.active {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 224, 255, .7);
        }

        .nav-menu a.active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
            box-shadow: var(--glow);
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
        }

        .btn-orange {
            background: var(--orange);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 122, 47, .35);
        }

        .btn-orange:hover {
            background: #e96a1b;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 122, 47, .45);
        }

        .btn-orange:focus,
        .btn-blue:focus,
        .btn-ghost:focus {
            outline: 2px solid var(--orange);
            outline-offset: 2px;
        }

        .btn-blue {
            background: var(--primary);
            color: #fff;
        }

        .btn-blue:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-ghost {
            background: transparent;
            color: #eaf2fa;
            border: 1.5px solid rgba(234, 242, 250, .65);
        }

        .btn-ghost:hover {
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            width: 42px;
            height: 42px;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
        }

        /* countdown */
        .countdown-bar {
            background: rgba(11, 20, 34, .92);
            border-bottom: 1px solid rgba(0, 224, 255, .25);
            padding: 14px 0;
        }

        .countdown-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            flex-wrap: wrap;
        }

        .countdown-label {
            color: #8ba0b8;
            font-size: 14px;
        }

        .countdown-nums {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .cd-item {
            background: rgba(0, 224, 255, .1);
            border: 1px solid rgba(0, 224, 255, .4);
            border-radius: 8px;
            padding: 6px 12px;
            min-width: 56px;
            text-align: center;
        }

        .cd-num {
            font-family: var(--mono);
            font-size: 26px;
            font-weight: 700;
            color: var(--accent);
            text-shadow: 0 0 12px rgba(0, 224, 255, .65);
            line-height: 1.2;
        }

        .cd-unit {
            font-size: 12px;
            color: #8ba0b8;
            display: block;
            margin-top: 2px;
        }

        .cd-sep {
            color: var(--accent);
            font-weight: 700;
            font-size: 22px;
        }

        /* hero */
        .hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            min-height: 560px;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 20, 34, .92) 0%, rgba(11, 20, 34, .72) 55%, rgba(11, 20, 34, .45) 100%);
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 680px;
            padding: 88px 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 224, 255, .12);
            border: 1px solid rgba(0, 224, 255, .45);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            padding: 6px 18px;
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: 46px;
            line-height: 1.2;
            font-weight: 800;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: .5px;
        }

        .hero-title .highlight {
            color: var(--accent);
            text-shadow: 0 0 18px rgba(0, 224, 255, .5);
        }

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: #c6d4e3;
            max-width: 540px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* features */
        .features-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
        }

        .feature-item {
            position: relative;
            padding: 36px 28px;
            background: transparent;
            border-top: 2px solid var(--border);
            transition: background .25s ease, box-shadow .25s ease, transform .25s ease, border-color .25s ease;
        }

        .feature-item:hover {
            border-top-color: var(--orange);
            background: #fff;
            box-shadow: var(--shadow-hover);
            border-radius: 0 0 var(--radius) var(--radius);
            transform: translateY(-4px);
        }

        .feature-num {
            font-family: var(--mono);
            font-size: 44px;
            font-weight: 800;
            color: var(--border);
            line-height: 1;
            margin-bottom: 16px;
            transition: color .25s ease;
        }

        .feature-item:hover .feature-num {
            color: var(--orange);
        }

        .feature-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        .feature-item+.feature-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 40px;
            width: 1px;
            height: 80px;
            background: var(--border);
        }

        /* gallery */
        .gallery-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            grid-auto-rows: 220px;
            gap: 20px;
        }

        .gallery-item {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius);
            cursor: pointer;
        }

        .gallery-item.large {
            grid-row: span 2;
        }

        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .gallery-item:hover img {
            transform: scale(1.05);
        }

        .gallery-item::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(11, 20, 34, .75));
            opacity: 0;
            transition: opacity .3s ease;
        }

        .gallery-item:hover::after {
            opacity: 1;
        }

        .gallery-caption {
            position: absolute;
            left: 16px;
            bottom: 14px;
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            z-index: 2;
            opacity: 0;
            transform: translateY(8px);
            transition: all .3s ease;
        }

        .gallery-item:hover .gallery-caption {
            opacity: 1;
            transform: translateY(0);
        }

        /* signup form */
        .signup-card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px;
            position: relative;
            overflow: hidden;
            max-width: 860px;
            margin: 0 auto;
        }

        .signup-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--primary), var(--orange));
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group.full {
            grid-column: span 2;
        }

        .form-group label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

        .form-group input,
        .form-group select {
            height: 44px;
            border: 1.5px solid #D5E0EA;
            border-radius: 8px;
            padding: 0 14px;
            background: #f9fbfd;
            color: var(--text);
            transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
        }

        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 111, 216, .15);
            background: #fff;
        }

        .form-group select {
            appearance: auto;
        }

        .btn-submit {
            width: 100%;
            margin-top: 8px;
        }

        .privacy-note {
            font-size: 13px;
            color: #8ba0b8;
            text-align: center;
            margin-top: 16px;
            line-height: 1.6;
        }

        /* faq */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow .25s ease;
        }

        .faq-item.active {
            box-shadow: var(--shadow-hover);
        }

        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 20px 24px;
            min-height: 60px;
            font-weight: 600;
            font-size: 16px;
            position: relative;
            user-select: none;
        }

        .faq-q::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity .25s ease;
        }

        .faq-item.active .faq-q::before {
            opacity: 1;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            transition: transform .3s ease, background .25s ease, color .25s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: var(--dark);
        }

        .faq-a {
            max-height: 0;
            padding: 0 24px;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
        }

        .faq-item.active .faq-a {
            max-height: 200px;
            padding: 0 24px 20px;
        }

        .faq-a p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* news */
        .news-list {
            max-width: 880px;
            margin: 0 auto;
        }

        .news-item {
            display: flex;
            gap: 20px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            margin-bottom: 16px;
            transition: box-shadow .25s ease, transform .25s ease;
        }

        .news-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .news-thumb {
            width: 120px;
            height: 84px;
            flex-shrink: 0;
            border-radius: 10px;
            overflow: hidden;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .news-item:hover .news-thumb img {
            transform: scale(1.06);
        }

        .news-info {
            flex: 1;
            min-width: 0;
        }

        .news-info .tag {
            display: inline-block;
            background: rgba(27, 111, 216, .1);
            color: var(--primary);
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 999px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .news-info h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .news-info h3 a:hover {
            color: var(--primary);
        }

        .news-summary {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
        }

        .news-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #9aabbf;
        }

        .news-meta .read-more {
            color: var(--primary);
            font-weight: 600;
        }

        .news-meta .read-more:hover {
            text-decoration: underline;
        }

        .empty-state {
            background: #fff;
            border: 1px dashed var(--border);
            border-radius: var(--radius);
            text-align: center;
            padding: 56px 20px;
            color: var(--muted);
            font-size: 16px;
        }

        .news-more {
            text-align: center;
            margin-top: 36px;
        }

        /* cta band */
        .cta-band {
            background: var(--dark);
            padding: 64px 0;
            border-top: 1px solid rgba(0, 224, 255, .12);
        }

        .cta-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 24px;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
        }

        .cta-inner p {
            color: #8ba0b8;
            font-size: 16px;
            max-width: 560px;
            line-height: 1.7;
        }

        /* footer */
        .site-footer {
            background: var(--dark);
            border-top: 1px solid rgba(0, 224, 255, .12);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: #8ba0b8;
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            color: #8ba0b8;
            font-size: 14px;
            transition: color .25s ease;
        }

        .footer-col ul a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            color: #64788f;
            font-size: 13px;
        }

        /* responsive */
        @media (max-width: 1200px) {
            .container {
                padding: 0 20px;
            }
        }

        @media (max-width: 992px) {
            .features-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-item+.feature-item::before {
                display: none;
            }
            .gallery-grid {
                grid-template-columns: 1fr 1fr;
                grid-auto-rows: 200px;
            }
            .gallery-item.large {
                grid-row: span 2;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--dark);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                transform: translateY(-120%);
                transition: transform .3s ease;
                border-bottom: 1px solid rgba(0, 224, 255, .2);
                box-shadow: 0 16px 32px rgba(0, 0, 0, .4);
            }
            .nav-menu.open {
                transform: translateY(0);
            }
            .nav-menu a {
                padding: 14px 8px;
                border-left: 3px solid transparent;
            }
            .nav-menu a.active::after {
                display: none;
            }
            .nav-menu a.active {
                border-left-color: var(--accent);
                text-shadow: none;
            }
            .header-cta .btn {
                display: none;
            }
            .section {
                padding: 60px 0;
            }
            .section-head {
                margin-bottom: 36px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .hero {
                min-height: 480px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-inner {
                padding: 64px 0;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full {
                grid-column: span 1;
            }
            .signup-card {
                padding: 32px 24px;
            }
            .gallery-grid {
                grid-template-columns: 1fr;
                grid-auto-rows: 200px;
            }
            .gallery-item.large {
                grid-row: auto;
            }
            .news-item {
                flex-direction: column;
            }
            .news-thumb {
                width: 100%;
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }
            .hero {
                min-height: 440px;
            }
            .hero-title {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .features-wrap {
                grid-template-columns: 1fr;
            }
            .countdown-inner {
                gap: 10px;
            }
            .countdown-label {
                width: 100%;
                text-align: center;
            }
            .cd-num {
                font-size: 22px;
            }
            .cd-item {
                min-width: 48px;
                padding: 4px 8px;
            }
            .news-info h3 {
                font-size: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1B6FD8;
            --primary-dark: #1558B0;
            --primary-light: #E8F1FC;
            --accent-cyan: #00E0FF;
            --accent-green: #33F0A0;
            --accent-orange: #FF7A2F;
            --dark-bg: #0B1422;
            --dark-bg-light: #132237;
            --dark-text: #EAF2FA;
            --body-bg: #F5F8FC;
            --body-text: #223043;
            --text-muted: #5B6B83;
            --border-color: #E3EAF2;
            --card-shadow: 0 8px 24px rgba(23, 42, 74, 0.08);
            --card-shadow-hover: 0 12px 32px rgba(23, 42, 74, 0.14);
            --glow-cyan: 0 0 12px rgba(0, 224, 255, 0.45);
            --glow-orange: 0 0 16px rgba(255, 122, 47, 0.45);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --container-max: 1200px;
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--body-bg);
            color: var(--body-text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--primary-dark);
        }

        ul,
        ol {
            list-style: none;
        }

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

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: 2px solid transparent;
            text-decoration: none;
            transition: all var(--transition);
            line-height: 1.4;
            letter-spacing: 0.5px;
        }

        .btn:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--accent-orange);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 122, 47, 0.3);
        }

        .btn-primary:hover {
            background: #ff8f4d;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--glow-orange);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 8px rgba(255, 122, 47, 0.25);
        }

        .btn-secondary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(27, 111, 216, 0.25);
        }

        .btn-secondary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 111, 216, 0.35);
        }

        .btn-secondary:active {
            transform: translateY(1px);
        }

        .btn-ghost {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }

        .btn-ghost:hover {
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 12px rgba(255, 255, 255, 0.15);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: 8px;
        }

        /* ========== Header ========== */
        .site-header {
            background: var(--dark-bg);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 224, 255, 0.12);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: baseline;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            text-decoration: none;
            white-space: nowrap;
        }

        .logo:hover {
            color: #fff;
        }

        .logo .logo-sub {
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            margin-left: 6px;
            letter-spacing: 0.5px;
            text-shadow: 0 0 8px rgba(0, 224, 255, 0.4);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
            flex: 1;
            justify-content: flex-end;
        }

        .nav-menu a {
            color: #A8B8CA;
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 2px;
            position: relative;
            transition: color var(--transition);
        }

        .nav-menu a:hover {
            color: #fff;
        }

        .nav-menu a.active {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 224, 255, 0.3);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: var(--glow-cyan);
        }

        .header-cta {
            margin-left: 8px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== Page Hero ========== */
        .page-hero {
            position: relative;
            background: linear-gradient(100deg, rgba(11, 20, 34, 0.92) 0%, rgba(11, 20, 34, 0.75) 50%, rgba(11, 20, 34, 0.5) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 110px 0 110px;
            color: var(--dark-text);
            border-bottom: 1px solid rgba(0, 224, 255, 0.15);
        }

        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(0, 224, 255, 0.12);
            border: 1px solid rgba(0, 224, 255, 0.35);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-tag);
            letter-spacing: 1px;
            margin-bottom: 24px;
        }

        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            max-width: 720px;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .page-hero .hero-sub {
            font-size: 17px;
            color: #A8B8CA;
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== Value Strip ========== */
        .value-strip {
            padding: 90px 0 50px;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 5px 14px;
            border-radius: var(--radius-tag);
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--body-text);
        }

        .value-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 960px;
            margin: 0 auto;
        }

        .value-item {
            display: flex;
            align-items: center;
            gap: 32px;
            padding: 32px 0;
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }

        .value-item:last-child {
            border-bottom: none;
        }

        .value-item .value-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            font-family: "DIN Alternate", "Roboto Mono", monospace;
            min-width: 80px;
            opacity: 0.7;
            transition: all var(--transition);
        }

        .value-item:hover .value-num {
            color: var(--accent-orange);
            opacity: 1;
            transform: scale(1.05);
        }

        .value-item .value-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--body-text);
        }

        .value-item .value-body p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 560px;
        }

        /* ========== News Showcase ========== */
        .news-showcase {
            padding: 50px 0 90px;
        }

        .showcase-grid {
            display: flex;
            flex-direction: column;
            gap: 48px;
        }

        .showcase-card {
            display: flex;
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .showcase-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }

        .showcase-card .card-img {
            flex: 0 0 42%;
            position: relative;
            overflow: hidden;
            min-height: 260px;
        }

        .showcase-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .showcase-card:hover .card-img img {
            transform: scale(1.05);
        }

        .showcase-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 20, 34, 0.25) 0%, transparent 40%);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .showcase-card:hover .card-img::after {
            opacity: 1;
        }

        .showcase-card .card-body {
            flex: 1;
            padding: 40px 44px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .showcase-card .card-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            margin-bottom: 16px;
            align-self: flex-start;
        }

        .showcase-card .card-title {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--body-text);
            margin-bottom: 12px;
        }

        .showcase-card .card-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .showcase-card .card-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: auto;
        }

        .showcase-card .card-meta .read-more {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition);
        }

        .showcase-card .card-meta .read-more:hover {
            gap: 8px;
            color: var(--primary-dark);
        }

        /* ========== CTA Banner ========== */
        .cta-banner {
            background: var(--dark-bg);
            padding: 80px 0;
            position: relative;
            border-top: 1px solid rgba(0, 224, 255, 0.2);
            border-bottom: 1px solid rgba(0, 224, 255, 0.2);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 224, 255, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-banner .inner {
            position: relative;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-banner h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .cta-banner p {
            font-size: 16px;
            color: #A8B8CA;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .cta-banner .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 90px 0 70px;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: box-shadow var(--transition);
            border-left: 3px solid transparent;
        }

        .faq-item.open {
            border-left-color: var(--accent-cyan);
            box-shadow: var(--card-shadow-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 28px;
            cursor: pointer;
            min-height: 60px;
            gap: 20px;
        }

        .faq-question h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--body-text);
            line-height: 1.5;
        }

        .faq-icon {
            position: relative;
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--primary);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .faq-icon::before {
            top: 9px;
            left: 0;
            width: 20px;
            height: 2px;
        }

        .faq-icon::after {
            top: 0;
            left: 9px;
            width: 2px;
            height: 20px;
        }

        .faq-item.open .faq-icon::after {
            transform: rotate(90deg);
            opacity: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 28px 22px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }

        /* ========== Contact ========== */
        .contact-section {
            padding: 50px 0 90px;
        }

        .contact-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 40px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
            max-width: 860px;
            margin: 0 auto;
        }

        .contact-info h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--body-text);
        }

        .contact-info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .contact-info a {
            color: var(--primary);
            font-weight: 600;
        }

        .contact-info a:hover {
            color: var(--primary-dark);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--dark-bg);
            color: #A8B8CA;
            padding: 60px 0 30px;
            border-top: 1px solid rgba(0, 224, 255, 0.1);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 14px;
            display: inline-flex;
        }

        .footer-brand p {
            font-size: 14px;
            color: #8A9BB0;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #8A9BB0;
            font-size: 14px;
            text-decoration: none;
            transition: color var(--transition);
            position: relative;
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: #6A7B90;
        }

        /* ========== Responsive ========== */
        @media (max-width: 992px) {
            .showcase-card {
                flex-direction: column;
            }

            .showcase-card .card-img {
                min-height: 220px;
            }

            .showcase-card .card-body {
                padding: 28px 30px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--dark-bg);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                gap: 8px;
                border-bottom: 1px solid rgba(0, 224, 255, 0.2);
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
            }

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

            .nav-menu a {
                width: 100%;
                padding: 14px 8px;
                border-left: 3px solid transparent;
                font-size: 16px;
            }

            .nav-menu a:hover {
                border-left-color: var(--accent-cyan);
                padding-left: 16px;
            }

            .nav-menu a.active {
                border-left-color: var(--accent-cyan);
                padding-left: 16px;
            }

            .nav-menu a.active::after {
                display: none;
            }

            .header-cta {
                display: none;
            }

            .nav-menu .mobile-cta {
                display: inline-flex;
                margin-top: 12px;
                width: auto;
                border-left: none;
                padding: 10px 24px;
            }

            .page-hero {
                padding: 80px 0;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .page-hero .hero-sub {
                font-size: 15px;
            }

            .value-strip {
                padding: 60px 0 30px;
            }

            .value-item {
                flex-direction: row;
                gap: 20px;
                padding: 24px 0;
            }

            .value-item .value-num {
                font-size: 32px;
                min-width: 56px;
            }

            .news-showcase {
                padding: 30px 0 60px;
            }

            .showcase-grid {
                gap: 32px;
            }

            .cta-banner {
                padding: 60px 0;
            }

            .cta-banner h2 {
                font-size: 24px;
            }

            .faq-section {
                padding: 60px 0 40px;
            }

            .contact-section {
                padding: 30px 0 60px;
            }

            .contact-card {
                padding: 28px;
                flex-direction: column;
                gap: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

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

        @media (max-width: 576px) {
            .container {
                padding: 0 18px;
            }

            .page-hero h1 {
                font-size: 27px;
            }

            .page-hero .hero-sub {
                font-size: 14px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .value-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .value-item .value-num {
                min-width: auto;
            }

            .showcase-card .card-img {
                min-height: 180px;
            }

            .showcase-card .card-body {
                padding: 22px 20px;
            }

            .showcase-card .card-title {
                font-size: 18px;
            }

            .cta-banner .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-banner .cta-actions .btn {
                width: 100%;
            }

            .faq-question {
                padding: 18px 20px;
            }

            .faq-item.open .faq-answer {
                padding: 0 20px 18px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }

            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1B6FD8;
            --primary-dark: #1357B0;
            --primary-light: #4A90E4;
            --bg-light: #F5F8FC;
            --text-main: #223043;
            --text-sub: #5B6B83;
            --border: #E3EAF2;
            --dark: #0B1422;
            --dark-text: #EAF2FA;
            --neon: #00E0FF;
            --accent: #FF7A2F;
            --accent-hover: #FF8F4F;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(23, 42, 74, 0.08);
            --shadow-hover: 0 12px 32px rgba(23, 42, 74, 0.14);
            --shadow-neon: 0 0 12px rgba(0, 224, 255, 0.45);
            --transition: 0.25s ease;
            --container: 1200px;
            --article-width: 860px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-mono: "DIN Alternate", "Roboto Mono", "Courier New", monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        img {
            max-width: 100%;
            display: block;
            border-radius: 12px;
        }

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

        ul,
        ol {
            list-style: none;
        }

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

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

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

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.2;
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }

        .btn:active {
            transform: translateY(1px);
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 4px 16px rgba(255, 122, 47, 0.3);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(255, 122, 47, 0.45);
        }

        .btn-secondary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(27, 111, 216, 0.35);
        }

        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-ghost:hover {
            background: rgba(27, 111, 216, 0.06);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(27, 111, 216, 0.15);
        }

        .btn-light {
            background: var(--neon);
            color: var(--dark);
            border-color: var(--neon);
        }

        .btn-light:hover {
            background: #33E6FF;
            border-color: #33E6FF;
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(0, 224, 255, 0.5);
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            background: rgba(27, 111, 216, 0.08);
            color: var(--primary);
            border: 1px solid rgba(27, 111, 216, 0.15);
        }

        .tag-neon {
            background: rgba(0, 224, 255, 0.1);
            color: var(--neon);
            border-color: rgba(0, 224, 255, 0.25);
        }

        /* ===== Header 导航 ===== */
        .site-header {
            background: var(--dark);
            height: 72px;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
            border-bottom: 1px solid rgba(0, 224, 255, 0.15);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 4px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.2;
            white-space: nowrap;
        }

        .logo-sub {
            font-size: 14px;
            font-weight: 400;
            color: var(--neon);
            letter-spacing: 1px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
            margin-right: 16px;
        }

        .nav-menu a {
            position: relative;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(234, 242, 250, 0.75);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .nav-menu a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-menu a.active {
            color: var(--neon);
            text-shadow: 0 0 12px rgba(0, 224, 255, 0.4);
        }

        .nav-menu a.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--neon);
            border-radius: 3px;
            box-shadow: 0 0 8px rgba(0, 224, 255, 0.7);
        }

        .header-cta {
            padding: 10px 22px;
            font-size: 14px;
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle:hover span {
            background: var(--neon);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            padding: 18px 0;
        }

        .breadcrumb-wrap nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-sub);
        }

        .breadcrumb-wrap a {
            color: var(--primary);
            transition: color var(--transition);
        }

        .breadcrumb-wrap a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        .breadcrumb-wrap .sep {
            color: #B4C2D4;
            font-size: 13px;
        }

        .breadcrumb-wrap .current {
            color: var(--text-main);
            font-weight: 500;
            max-width: 400px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章页主体 ===== */
        .article-page {
            background: var(--bg-light);
            padding-bottom: 80px;
        }

        /* ===== 文章头部 ===== */
        .article-header-wrapper {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 56px 0 40px;
            margin-bottom: 40px;
        }

        .article-header {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .article-header .article-header-inner {
            max-width: var(--article-width);
            margin: 0 auto;
        }

        .article-header h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 24px;
        }

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

        .meta-label {
            color: #9AA8BC;
            font-size: 13px;
        }

        .meta-item a {
            color: var(--primary);
            font-weight: 500;
        }

        .meta-item a:hover {
            text-decoration: underline;
        }

        .meta-item time {
            color: var(--text-sub);
        }

        .article-summary {
            background: var(--bg-light);
            border-left: 4px solid var(--primary);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-sub);
        }

        .article-summary p {
            margin: 0;
        }

        /* ===== 正文区 ===== */
        .article-body-wrap {
            max-width: var(--article-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .article-body {
            background: #fff;
            border-radius: var(--radius);
            padding: 48px 52px;
            box-shadow: var(--shadow);
            font-size: 16px;
            line-height: 1.85;
            color: #2A394F;
        }

        .article-body h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin: 40px 0 18px;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 21px;
            font-weight: 600;
            color: var(--text-main);
            margin: 30px 0 14px;
            line-height: 1.4;
        }

        .article-body p {
            margin-bottom: 18px;
            line-height: 1.85;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body a:hover {
            color: var(--primary-dark);
        }

        .article-body blockquote {
            margin: 28px 0;
            padding: 18px 24px;
            background: var(--bg-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-sub);
            font-style: normal;
        }

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

        .article-body ul,
        .article-body ol {
            margin: 0 0 20px 24px;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: 10px;
            line-height: 1.8;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 15px;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .article-body table th,
        .article-body table td {
            padding: 14px 16px;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-body table th {
            background: var(--bg-light);
            font-weight: 600;
            color: var(--text-main);
        }

        .article-body table tr:hover td {
            background: #FAFCFF;
        }

        .article-body code {
            background: #F0F3F7;
            padding: 2px 8px;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: #C7254E;
        }

        .article-body pre {
            background: var(--dark);
            color: var(--dark-text);
            padding: 22px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 28px 0;
            line-height: 1.6;
            font-size: 14px;
        }

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

        .article-body img {
            border-radius: 12px;
            margin: 28px 0;
            box-shadow: var(--shadow);
        }

        .article-body .note-box {
            background: #FFF8F0;
            border: 1px solid #FFD9B8;
            border-radius: var(--radius-sm);
            padding: 18px 22px;
            margin: 28px 0;
            color: #7A4A1F;
            line-height: 1.7;
        }

        .article-body .note-box strong {
            color: #B45309;
        }

        /* ===== 文章底部 ===== */
        .article-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }

        .article-footer .tag-list {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        /* ===== 空态 ===== */
        .article-empty {
            max-width: var(--article-width);
            margin: 0 auto;
            padding: 80px 24px;
            text-align: center;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .article-empty h1 {
            font-size: 32px;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .article-empty p {
            color: var(--text-sub);
            margin-bottom: 24px;
        }

        /* ===== 推荐卡片 ===== */
        .related-section {
            background: var(--bg-light);
            padding: 80px 0;
        }

        .related-section .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .related-section .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .related-section .section-head p {
            color: var(--text-sub);
            font-size: 15px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(27, 111, 216, 0.1);
        }

        .related-thumb {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }

        .related-card:hover .related-thumb img {
            transform: scale(1.05);
        }

        .related-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(11, 20, 34, 0.8);
            color: var(--neon);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 500;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(0, 224, 255, 0.2);
        }

        .related-info {
            padding: 20px 22px 24px;
        }

        .related-info h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-info p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-more {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .related-more::after {
            content: "→";
            transition: transform var(--transition);
        }

        .related-card:hover .related-more::after {
            transform: translateX(4px);
        }

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

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.3;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 20, 34, 0.9) 0%, rgba(11, 20, 34, 0.75) 100%);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            color: var(--dark-text);
            max-width: 720px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .cta-inner h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
        }

        .cta-inner p {
            font-size: 16px;
            line-height: 1.7;
            margin-bottom: 32px;
            color: rgba(234, 242, 250, 0.8);
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            border-top: 1px solid rgba(0, 224, 255, 0.1);
            padding: 64px 0 0;
            color: rgba(234, 242, 250, 0.75);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 24px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(234, 242, 250, 0.6);
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col a {
            font-size: 14px;
            color: rgba(234, 242, 250, 0.65);
            transition: all var(--transition);
        }

        .footer-col a:hover {
            color: var(--neon);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .footer-col ul li:last-child {
            font-size: 14px;
            color: rgba(234, 242, 250, 0.5);
            line-height: 1.7;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(234, 242, 250, 0.45);
        }

        .footer-bottom a {
            color: rgba(234, 242, 250, 0.6);
        }

        .footer-bottom a:hover {
            color: var(--neon);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .related-card:last-child {
                grid-column: span 2;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: span 2;
            }

            .article-body {
                padding: 40px 36px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                gap: 12px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--dark);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 4px;
                margin: 0;
                border-bottom: 1px solid rgba(0, 224, 255, 0.2);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
                transform: translateY(-110%);
                transition: transform 0.35s ease;
                z-index: 99;
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-menu a {
                padding: 14px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .nav-menu a.active::after {
                left: 16px;
                right: auto;
                width: 3px;
                height: auto;
                top: 12px;
                bottom: 12px;
                border-radius: 3px;
            }

            .header-cta {
                display: none;
            }

            .article-header {
                padding: 40px 20px;
            }

            .article-header h1 {
                font-size: 28px;
                line-height: 1.35;
            }

            .article-meta {
                gap: 14px;
                font-size: 13px;
            }

            .article-body-wrap {
                padding: 0 20px;
            }

            .article-body {
                padding: 32px 24px;
                font-size: 15px;
            }

            .article-body h2 {
                font-size: 23px;
            }

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

            .article-footer {
                flex-direction: column;
                align-items: flex-start;
            }

            .related-section {
                padding: 56px 0;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .related-card:last-child {
                grid-column: auto;
            }

            .cta-section {
                padding: 56px 0;
            }

            .cta-inner h2 {
                font-size: 26px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-brand {
                grid-column: auto;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
                padding: 20px 0;
            }
        }

        @media (max-width: 576px) {
            .breadcrumb-wrap .current {
                max-width: 200px;
            }

            .article-header h1 {
                font-size: 24px;
            }

            .article-body {
                padding: 24px 18px;
                border-radius: var(--radius-sm);
            }

            .article-body pre {
                padding: 16px;
                font-size: 13px;
            }

            .article-summary {
                padding: 14px 16px;
                font-size: 14px;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .related-thumb {
                height: 160px;
            }

            .footer-bottom {
                font-size: 12px;
            }
        }

        /* ===== 动画状态 ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }