/* roulang page: index */
:root {
            --brand: #2E6FF2;
            --brand-dark: #1E5AD7;
            --sky: #7BB3FF;
            --ink: #162A48;
            --body: #3D4E6B;
            --muted: #718096;
            --line: #E1E7F0;
            --lite: #F6F8FB;
            --soft: #EDF3FF;
            --red: #C7443B;
            --radius: 18px;
            --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 12px 24px -12px rgba(30, 50, 90, .08);
            --shadow-lift: 0 18px 32px -16px rgba(40, 80, 180, .16);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: #F6F8FB;
            color: #3D4E6B;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, sans-serif;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s;
        }

        button {
            font-family: inherit;
        }

        .container-wide {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-wide {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container-wide {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        .section-pad {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }

        @media (min-width: 768px) {
            .section-pad {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255, 255, 255, .86);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid #E1E7F0;
            transition: box-shadow .25s;
        }

        .site-header.is-scrolled {
            box-shadow: 0 8px 30px -18px rgba(22, 42, 72, .2);
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: #3D4E6B;
            padding: 7px 14px;
            border-radius: 999px;
            white-space: nowrap;
            transition: color .18s, background .18s;
        }

        .nav-link:hover {
            background: #EDF3FF;
            color: #162A48;
        }

        .nav-link.active {
            background: #EDF3FF;
            color: #2E6FF2;
            font-weight: 600;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            height: 48px;
            padding: 0 1.35rem;
            border-radius: 10px;
            background: #2E6FF2;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            transition: background .2s, transform .12s, box-shadow .2s;
        }

        .btn-primary:hover {
            background: #1E5AD7;
            transform: translateY(-1px);
            box-shadow: 0 12px 24px -12px rgba(46, 111, 242, .5);
        }

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

        .btn-secondary {
            height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: 0 1.35rem;
            border-radius: 10px;
            background: #fff;
            border: 1px solid #E1E7F0;
            color: #162A48;
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            transition: border-color .2s, background .2s, transform .12s;
        }

        .btn-secondary:hover {
            border-color: #7BB3FF;
            background: #F6F8FB;
            transform: translateY(-1px);
        }

        .card-ele {
            border: 1px solid #E1E7F0;
            background: #fff;
            border-radius: 18px;
            box-shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 12px 24px -12px rgba(30, 50, 90, .08);
            transition: transform .25s, box-shadow .25s;
        }

        .card-ele:hover {
            transform: translateY(-3px);
            box-shadow: 0 18px 32px -16px rgba(40, 80, 180, .16);
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            border-radius: 999px;
            padding: 3px 11px;
            font-size: 12px;
            line-height: 1.6;
            font-weight: 500;
            background: #EDF3FF;
            color: #2E6FF2;
        }

        .red-pill {
            background: #FFF0EE;
            color: #C7443B;
        }

        .section-overline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: #2E6FF2;
            letter-spacing: .08em;
            text-transform: uppercase;
        }

        .section-overline::before {
            content: "";
            display: inline-block;
            width: 18px;
            height: 2px;
            border-radius: 99px;
            background: #7BB3FF;
        }

        .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #2E6FF2;
            font-size: 14px;
            font-weight: 600;
            transition: gap .2s;
        }

        .arrow-link:hover {
            gap: 10px;
            color: #1E5AD7;
        }

        .text-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .text-clamp-3 {
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .hero-visual-card {
            border-radius: 22px;
            border: 1px solid rgba(225, 231, 240, .8);
            box-shadow: 0 24px 48px -24px rgba(30, 50, 90, .25);
            overflow: hidden;
            background: #fff;
        }

        .soft-grid-bg {
            background-image: linear-gradient(to bottom right, rgba(46, 111, 242, .04), rgba(123, 179, 255, .07));
        }

        .faq-item[open] .faq-q {
            color: #2E6FF2;
        }

        .faq-icon {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: #F6F8FB;
            border: 1px solid #E1E7F0;
            position: relative;
            flex-shrink: 0;
            transition: background .2s, border-color .2s;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            left: 50%;
            top: 50%;
            width: 10px;
            height: 2px;
            background: #2E6FF2;
            transform: translate(-50%, -50%);
            border-radius: 2px;
        }

        .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
        }

        .faq-item[open] .faq-icon {
            background: #EDF3FF;
            border-color: #7BB3FF;
        }

        .faq-item[open] .faq-icon::after {
            transform: translate(-50%, -50%) rotate(0);
        }

        .input-base {
            width: 100%;
            border-radius: 10px;
            border: 1px solid #E1E7F0;
            background: #fff;
            padding: 0.75rem 1rem;
            color: #162A48;
            font-size: 14px;
            outline: none;
            transition: border-color .2s, box-shadow .2s;
        }

        .input-base:focus {
            border-color: #7BB3FF;
            box-shadow: 0 0 0 4px rgba(46, 111, 242, .12);
        }

        .testi-scroll {
            scrollbar-width: none;
        }

        .testi-scroll::-webkit-scrollbar {
            display: none;
        }

        .thumb-fallback {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            height: 100%;
            min-height: 88px;
            background: linear-gradient(135deg, rgba(46, 111, 242, .16), rgba(123, 179, 255, .2));
            color: #2E6FF2;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .08em;
        }

        .mobile-bottom-bar {
            position: fixed;
            bottom: 12px;
            left: 12px;
            right: 12px;
            z-index: 55;
            background: #162A48;
            color: #fff;
            border-radius: 16px;
            box-shadow: 0 16px 32px -12px rgba(22, 42, 72, .35);
            padding: 10px 14px;
            display: flex;
            align-items: center;
            gap: 12px;
            transform: translateY(130%);
            transition: transform .35s cubic-bezier(.22, .68, 0, 1);
        }

        .mobile-bottom-bar.show {
            transform: translateY(0);
        }

        @media (min-width: 1024px) {
            .mobile-bottom-bar {
                display: none;
            }
        }

        .lp-red-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #C7443B;
        }

        .line-h::after {
            content: "";
            display: block;
            width: 100%;
            height: 1px;
            background: #E1E7F0;
            margin: 2.2rem 0 1rem;
        }

        .faq-hover:hover {
            background: #F6F8FB;
        }

/* roulang page: category1 */
:root {
            --primary: #2E6FF2;
            --primary-dark: #1E5AD7;
            --primary-light: #7BB3FF;
            --surface-soft: #EDF3FF;
            --surface-page: #F6F8FB;
            --ink: #162A48;
            --body: #3D4E6B;
            --muted: #718096;
            --line: #E1E7F0;
            --footer: #12233B;
            --accent: #C7443B;
            --radius-card: 20px;
            --radius-btn: 10px;
            --shadow-card: 0 1px 2px rgba(15, 23, 42, .04), 0 12px 24px -12px rgba(30, 50, 90, .08);
            --shadow-hover: 0 18px 32px -16px rgba(40, 80, 180, .16);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--surface-page);
            color: var(--body);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, Helvetica, Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4 {
            color: var(--ink);
            line-height: 1.28;
            margin: 0;
        }

        p {
            margin: 0;
        }

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

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

        button, input, textarea {
            font: inherit;
        }

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container-wide {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 640px) {
            .container-wide {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container-wide {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        .section-md {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        @media (min-width: 768px) {
            .section-md {
                padding-top: 88px;
                padding-bottom: 88px;
            }
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            height: 72px;
            background: rgba(255, 255, 255, .86);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .25s ease, background .25s ease;
        }

        .site-header.is-scrolled {
            background: rgba(255, 255, 255, .94);
            box-shadow: 0 8px 24px -16px rgba(30, 50, 90, .14);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 15px;
            border-radius: 999px;
            font-size: 15px;
            white-space: nowrap;
            color: var(--body);
            transition: background .2s ease, color .2s ease;
        }

        .nav-link:hover {
            background: var(--surface-soft);
            color: var(--primary-dark);
        }

        .nav-link.active {
            background: var(--surface-soft);
            color: var(--primary);
            font-weight: 600;
        }

        .btn-primary,
        .btn-secondary,
        .btn-light {
            border-radius: var(--radius-btn);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 20px;
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 18px -8px rgba(46, 111, 242, .45);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 12px 22px -10px rgba(30, 90, 215, .5);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        .btn-secondary {
            background: #fff;
            border: 1px solid var(--line);
            color: var(--ink);
        }

        .btn-secondary:hover {
            border-color: var(--primary-light);
            background: #f8fbff;
            color: var(--primary-dark);
        }

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

        .btn-light {
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .16);
            color: #fff;
        }

        .btn-light:hover {
            background: rgba(255, 255, 255, .18);
            color: #fff;
            border-color: rgba(255, 255, 255, .3);
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            background: var(--surface-soft);
            color: #2857c7;
            font-size: 13px;
            font-weight: 500;
            white-space: nowrap;
        }

        .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: gap .2s ease, color .2s ease;
        }

        .arrow-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        .theme-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .theme-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .theme-media {
            overflow: hidden;
            border-radius: 0;
        }

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

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

        .feature-visual {
            border-radius: 24px;
            overflow: hidden;
            position: relative;
            isolation: isolate;
        }

        .feature-visual::after {
            content: "";
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(90deg, rgba(9, 17, 30, .78) 0%, rgba(9, 17, 30, .32) 55%, rgba(9, 17, 30, .08) 100%);
        }

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

        .timeline-wrap {
            position: relative;
        }

        .timeline-wrap::before {
            content: "";
            position: absolute;
            left: 6px;
            top: 12px;
            bottom: 12px;
            width: 1px;
            background: #dbe4f0;
        }

        .timeline-dot {
            width: 13px;
            height: 13px;
            border-radius: 999px;
            background: var(--primary);
            border: 3px solid #dce8ff;
            position: absolute;
            left: 0px;
            top: 22px;
        }

        .faq-item {
            border-bottom: 1px solid var(--line);
        }

        .faq-item:first-of-type {
            border-top: 1px solid var(--line);
        }

        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: transparent;
            border: 0;
            padding: 22px 2px;
            cursor: pointer;
            text-align: left;
            color: var(--ink);
            font-size: 16px;
            font-weight: 600;
            transition: color .2s ease;
        }

        .faq-q:hover,
        .faq-q[aria-expanded="true"] {
            color: var(--primary);
        }

        .faq-icon {
            position: relative;
            flex: 0 0 auto;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--line);
            background: #fff;
            transition: transform .25s ease, background .25s ease, border-color .25s ease;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            left: 50%;
            top: 50%;
            width: 12px;
            height: 1.5px;
            background: var(--body);
            transform: translate(-50%, -50%);
            border-radius: 1px;
        }

        .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
            transition: transform .25s ease, background .25s ease;
        }

        .faq-q[aria-expanded="true"] .faq-icon {
            border-color: var(--primary);
            background: var(--primary);
        }

        .faq-q[aria-expanded="true"] .faq-icon::before {
            background: #fff;
        }

        .faq-q[aria-expanded="true"] .faq-icon::after {
            transform: translate(-50%, -50%) rotate(0deg);
            background: #fff;
        }

        .faq-a {
            padding: 0 38px 22px 2px;
            color: var(--body);
            font-size: 15px;
            line-height: 1.85;
        }

        .faq-a p + p {
            margin-top: 8px;
        }

        .footer-link {
            color: #A6B7D0;
            display: inline-block;
            padding: 4px 0;
            font-size: 14px;
            transition: color .2s ease, padding-left .2s ease;
        }

        .footer-link:hover {
            color: #fff;
            padding-left: 4px;
        }

        .mobile-menu {
            display: none;
        }

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

        .command-panel {
            position: fixed;
            inset: 0;
            z-index: 80;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            padding: 16vh 16px 16px;
            background: rgba(22, 42, 72, .32);
            backdrop-filter: blur(2px);
        }

        .command-panel.hidden-panel {
            display: none;
        }

        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }
        }

        @media (min-width: 1024px) {
            .mobile-trigger {
                display: none;
            }
        }

/* roulang page: article */
:root {
            --primary: #2E6FF2;
            --primary-hover: #1E5AD7;
            --primary-light: #7BB3FF;
            --page-bg: #F6F8FB;
            --panel-blue: #EDF3FF;
            --heading: #162A48;
            --text: #3D4E6B;
            --muted: #718096;
            --line: #E1E7F0;
            --accent: #C7443B;
            --radius: 1rem;
            --radius-sm: .75rem;
            --shadow-card: 0 1px 2px rgba(15, 23, 42, .04), 0 12px 24px -12px rgba(30, 50, 90, .08);
            --shadow-hover: 0 18px 32px -16px rgba(40, 80, 180, .16);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, Helvetica, Arial, sans-serif;
            background: var(--page-bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

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

        @media (min-width: 640px) {
            .container-wide {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        @media (min-width: 1024px) {
            .container-wide {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 60;
            height: 72px;
            background: rgba(255, 255, 255, .86);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .3s ease;
        }

        .site-header.is-scrolled {
            box-shadow: 0 12px 28px -24px rgba(30, 50, 90, .28);
        }

        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 19px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            box-shadow: 0 8px 16px -8px rgba(46, 111, 242, .45);
        }

        .logo-name {
            color: var(--heading);
            font-size: 21px;
            font-weight: 800;
            letter-spacing: -.02em;
            white-space: nowrap;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            height: 38px;
            padding: 0 14px;
            margin: 0 2px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            outline: none;
            transition: background .2s ease, color .2s ease, box-shadow .2s ease;
        }

        .nav-link:hover {
            background: var(--panel-blue);
            color: var(--primary-hover);
        }

        .nav-link:focus-visible {
            box-shadow: 0 0 0 3px rgba(46, 111, 242, .28);
        }

        .nav-link.active {
            background: var(--panel-blue);
            color: var(--primary);
            font-weight: 700;
        }

        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 22px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: background .2s ease, border-color .2s ease, transform .12s ease, box-shadow .2s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 18px -12px rgba(46, 111, 242, .65);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 12px 22px -12px rgba(30, 90, 215, .55);
        }

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

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

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

        .btn-sm {
            height: 40px;
            padding: 0 16px;
            font-size: 14px;
        }

        .focus-ring:focus-visible,
        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .nav-link:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(46, 111, 242, .35);
        }

        .cmd-trigger {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 40px;
            width: 200px;
            padding: 0 12px;
            border-radius: 12px;
            background: #F6F8FB;
            border: 1px solid var(--line);
            color: var(--muted);
            font-size: 14px;
            cursor: pointer;
            transition: width .25s ease, border-color .25s ease, box-shadow .25s ease, background .25s ease;
        }

        .cmd-trigger:hover,
        .cmd-trigger:focus-visible {
            border-color: rgba(46, 111, 242, .5);
            box-shadow: 0 0 0 4px rgba(46, 111, 242, .12);
            background: #fff;
            color: var(--heading);
            outline: none;
        }

        .search-icon {
            width: 18px;
            height: 18px;
            color: var(--muted);
            flex-shrink: 0;
        }

        .kbd {
            font-size: 11px;
            line-height: 1;
            padding: 4px 6px;
            border-radius: 6px;
            border: 1px solid var(--line);
            background: #fff;
            color: var(--muted);
            font-family: inherit;
            margin-left: auto;
        }

        .command-overlay {
            position: fixed;
            inset: 0;
            z-index: 100;
            display: none;
            align-items: flex-start;
            justify-content: center;
            background: rgba(15, 23, 42, .42);
            padding: 12vh 16px 16px;
        }

        .command-overlay.open {
            display: flex;
        }

        .command-panel {
            width: min(640px, 100%);
            background: #fff;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 24px 60px -20px rgba(15, 23, 42, .35);
            border: 1px solid rgba(46, 111, 242, .15);
        }

        .site-menu-mobile {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            z-index: 55;
            background: rgba(255, 255, 255, .98);
            border-bottom: 1px solid var(--line);
            padding: 14px 18px 22px;
            box-shadow: 0 20px 32px -24px rgba(30, 50, 90, .3);
        }

        .site-menu-mobile.open {
            display: block;
        }

        .site-menu-mobile .nav-link {
            display: flex;
            width: 100%;
            height: 46px;
            padding: 0 14px;
            margin: 2px 0;
            border-radius: 12px;
            font-size: 16px;
            align-items: center;
        }

        .text-link {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color .2s, gap .2s;
        }

        .text-link:hover {
            color: var(--primary-hover);
            gap: 7px;
        }

        .article-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .article-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 111, 242, .18);
        }

        .breadcrumb-nav {
            font-size: 13px;
            color: var(--muted);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
        }

        .breadcrumb-nav a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--muted);
            transition: color .2s;
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
        }

        .breadcrumb-nav .sep {
            color: #B8C2D4;
        }

        .breadcrumb-nav .current {
            color: var(--text);
            font-weight: 600;
        }

        .article-heading {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--heading);
            letter-spacing: -.02em;
            margin: 14px 0 0;
        }

        @media (max-width: 768px) {
            .article-heading {
                font-size: 28px;
                line-height: 1.32;
            }
        }

        .article-meta-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px 18px;
            color: var(--muted);
            font-size: 14px;
        }

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

        .article-lead {
            background: var(--panel-blue);
            border: 1px solid rgba(46, 111, 242, .12);
            border-radius: 16px;
            padding: 18px 22px;
            color: var(--text);
            font-size: 15px;
            line-height: 1.9;
            margin: 28px 0 0;
        }

        .article-body {
            font-size: 16px;
            line-height: 1.95;
            color: var(--text);
        }

        .article-body p {
            margin: 1.05rem 0;
            line-height: 1.95;
        }

        .article-body h2 {
            font-size: 26px;
            line-height: 1.35;
            font-weight: 800;
            color: var(--heading);
            margin: 2.1rem 0 .9rem;
            letter-spacing: -.01em;
        }

        .article-body h3 {
            font-size: 20px;
            line-height: 1.45;
            font-weight: 750;
            color: var(--heading);
            margin: 1.7rem 0 .6rem;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-decoration-color: rgba(46, 111, 242, .35);
            text-underline-offset: 3px;
            transition: color .2s, text-decoration-color .2s;
        }

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

        .article-body ul,
        .article-body ol {
            padding-left: 22px;
            margin: 1.05rem 0;
        }

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

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

        .article-body li {
            margin: .4rem 0;
        }

        .article-body blockquote {
            margin: 1.5rem 0;
            padding: 18px 20px;
            border-left: 4px solid var(--primary);
            background: #F6F8FB;
            border-radius: 0 14px 14px 0;
            color: var(--text);
        }

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

        .article-body img {
            border-radius: 16px;
            margin: 1.6rem 0;
            box-shadow: var(--shadow-card);
            height: auto;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 14px;
            overflow: hidden;
            border-radius: 10px;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--line);
            padding: 12px 14px;
            text-align: left;
            vertical-align: top;
            line-height: 1.7;
        }

        .article-body th {
            background: var(--panel-blue);
            color: var(--heading);
            font-weight: 700;
        }

        .article-body table {
            display: block;
            overflow-x: auto;
            white-space: nowrap;
        }

        @media (min-width: 768px) {
            .article-body table {
                white-space: normal;
            }
        }

        .article-body code {
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
            font-size: 13px;
            background: #EEF2F8;
            color: #0F3158;
            padding: .18em .45em;
            border-radius: 8px;
        }

        .article-body pre {
            background: #1E2A3F;
            color: #E6EDFA;
            padding: 18px 20px;
            border-radius: 14px;
            overflow-x: auto;
            line-height: 1.7;
            margin: 1.5rem 0;
        }

        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .section-wrapper {
            padding-top: 56px;
            padding-bottom: 56px;
        }

        @media (min-width: 768px) {
            .section-wrapper {
                padding-top: 72px;
                padding-bottom: 72px;
            }
        }

        .section-title {
            font-size: 30px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--heading);
            letter-spacing: -.02em;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
        }

        .eyebrow {
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
            letter-spacing: .08em;
            margin-bottom: 6px;
        }

        .faq-item {
            border-bottom: 1px solid var(--line);
            transition: background .2s ease, border-radius .2s ease;
        }

        .faq-item:hover {
            background: #F9FBFD;
        }

        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 4px;
            background: transparent;
            border: 0;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--heading);
            text-align: left;
            transition: color .2s ease;
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--line);
            background: #fff;
            color: var(--text);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 500;
            flex-shrink: 0;
            transition: transform .25s ease, color .2s ease, border-color .2s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
            border-color: rgba(46, 111, 242, .35);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            opacity: 0;
            transition: max-height .32s ease, opacity .28s ease, padding .28s ease;
            color: var(--text);
            font-size: 15px;
            line-height: 1.85;
        }

        .faq-item.open .faq-a {
            max-height: 320px;
            opacity: 1;
            padding: 0 4px 22px;
        }

        .mobile-action {
            position: fixed;
            bottom: 18px;
            left: 16px;
            right: 16px;
            z-index: 58;
            display: none;
            gap: 10px;
            opacity: 0;
            transform: translateY(12px);
            transition: opacity .3s ease, transform .3s ease;
        }

        .mobile-action.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (max-width: 1023px) {
            .mobile-action {
                display: flex;
            }
            .mobile-action .btn-primary,
            .mobile-action .btn-secondary {
                flex: 1;
            }
        }

        .not-found-block {
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: category3 */
:root {
            --primary: #2E6FF2;
            --primary-dark: #1E5AD7;
            --accent-blue: #7BB3FF;
            --accent-light: #EDF3FF;
            --page-bg: #F6F8FB;
            --title-blue: #162A48;
            --body-gray: #3D4E6B;
            --muted-gray: #718096;
            --border-light: #E1E7F0;
            --brand-red: #C7443B;
            --footer-deep: #12233B;
            --footer-text: #A6B7D0;
            --card-radius: 1.25rem;
            --container-max: 1200px;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: #F6F8FB;
            color: #162A48;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        body.nav-scrolled .site-header {
            box-shadow: 0 12px 32px -16px rgba(22, 42, 72, .14);
            border-bottom-color: transparent;
        }
        .container-wide {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            height: 72px;
            background: rgba(255, 255, 255, .86);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(225, 231, 240, .9);
            transition: box-shadow .3s ease, border-color .3s ease;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            padding: .45rem .85rem;
            color: #3D4E6B;
            border-radius: 9999px;
            transition: background .2s ease, color .2s ease;
            white-space: nowrap;
            line-height: 1.4;
        }
        .nav-link:hover {
            background: #EDF3FF;
            color: #2E6FF2;
            text-decoration: none;
        }
        .nav-link.active {
            color: #2E6FF2;
            font-weight: 600;
            background: #EDF3FF;
        }
        .nav-search-toggle {
            display: flex;
            align-items: center;
            gap: .5rem;
            height: 40px;
            padding: 0 .9rem;
            border: 1px solid #E1E7F0;
            border-radius: .5rem;
            background: #F6F8FB;
            color: #718096;
            font-size: 13px;
            transition: border-color .2s, box-shadow .2s;
        }
        .nav-search-toggle:hover,
        .nav-search-toggle:focus-within {
            border-color: #7BB3FF;
            box-shadow: 0 0 0 4px rgba(46, 111, 242, .08);
        }
        .mobile-menu-panel {
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            z-index: 49;
            background: #fff;
            border-bottom: 1px solid #E1E7F0;
            padding: 1rem 1.25rem 1.4rem;
            display: none;
            box-shadow: 0 24px 48px -24px rgba(22, 42, 72, .18);
        }
        .mobile-menu-panel.open {
            display: block;
        }
        .mobile-menu-panel a {
            display: block;
            padding: .75rem .6rem;
            font-size: 16px;
            color: #3D4E6B;
            border-radius: .6rem;
            transition: background .2s;
        }
        .mobile-menu-panel a:hover {
            background: #EDF3FF;
            color: #2E6FF2;
            text-decoration: none;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 1.5rem;
            background: #2E6FF2;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border-radius: .55rem;
            transition: background .2s, transform .15s, box-shadow .2s;
            box-shadow: 0 10px 20px -10px rgba(46, 111, 242, .6);
            white-space: nowrap;
            line-height: 1;
        }
        .btn-primary:hover {
            background: #1E5AD7;
            color: #fff;
            text-decoration: none;
        }
        .btn-primary:active {
            transform: translateY(2px);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 1.5rem;
            background: #fff;
            color: #162A48;
            font-weight: 500;
            font-size: 15px;
            border: 1px solid #E1E7F0;
            border-radius: .55rem;
            transition: background .2s, border-color .2s, color .2s;
        }
        .btn-secondary:hover {
            border-color: #7BB3FF;
            background: #F1F6FF;
            color: #1E5AD7;
            text-decoration: none;
        }
        .btn-text-link {
            display: inline-flex;
            align-items: center;
            gap: .2rem;
            color: #2E6FF2;
            font-weight: 600;
            font-size: 15px;
            transition: gap .2s ease, color .2s;
        }
        .btn-text-link:hover {
            gap: .5rem;
            color: #1E5AD7;
            text-decoration: none;
        }
        .badge-cat {
            display: inline-flex;
            align-items: center;
            gap: .3rem;
            background: #EDF3FF;
            color: #2E6FF2;
            font-size: 12px;
            font-weight: 600;
            padding: .25rem .75rem;
            border-radius: 9999px;
            letter-spacing: .05em;
        }
        .icon-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 9999px;
        }
        .grid-card {
            background: #fff;
            border: 1px solid #E1E7F0;
            border-radius: 1.25rem;
            box-shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 12px 24px -12px rgba(30, 50, 90, .08);
            transition: transform .25s ease, box-shadow .25s ease;
        }
        .grid-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 18px 32px -16px rgba(40, 80, 180, .16);
        }
        .accordion-item {
            border-bottom: 1px solid #E1E7F0;
        }
        .accordion-item summary {
            list-style: none;
            cursor: pointer;
            padding: 1.4rem 0;
            font-size: 16px;
            font-weight: 600;
            color: #162A48;
            transition: color .2s;
            display: flex;
            align-items: center;
            justify-content: space-between;
            outline: none;
        }
        .accordion-item summary::-webkit-details-marker {
            display: none;
        }
        .accordion-item[open] summary {
            color: #2E6FF2;
        }
        .accordion-icon {
            position: relative;
            width: 24px;
            height: 24px;
            flex: none;
            border-radius: 9999px;
            background: #EDF3FF;
            transition: background .3s;
        }
        .accordion-icon::before,
        .accordion-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 11px;
            height: 2px;
            background: #2E6FF2;
            border-radius: 2px;
            transform: translate(-50%, -50%);
            transition: transform .3s;
        }
        .accordion-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
        }
        .accordion-item[open] .accordion-icon::after {
            transform: translate(-50%, -50%) rotate(0deg);
        }
        .accordion-answer {
            padding: 0 2rem 1.5rem 0;
            font-size: 15px;
            line-height: 1.8;
            color: #3D4E6B;
        }
        .mobile-bottom-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 45;
            transform: translateY(110%);
            transition: transform .4s ease;
            background: #fff;
            border-top: 1px solid #E1E7F0;
            padding: .8rem 1rem .9rem;
            display: none;
        }
        .mobile-bottom-cta.show {
            transform: translateY(0);
        }
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity .6s ease, transform .6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }
            .footer-main-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }
        @media (max-width: 640px) {
            .footer-main-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 767px) {
            .mobile-nav-toggle,
            .mobile-menu-panel {
                display: block;
            }
            .mobile-bottom-cta {
                display: flex;
            }
        }
        @media (min-width: 768px) {
            .mobile-nav-toggle,
            .mobile-menu-panel {
                display: none;
            }
            .mobile-bottom-cta {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
        --primary: #2E6FF2;
        --primary-dark: #1E5AD7;
        --sky: #7BB3FF;
        --page-bg: #F6F8FB;
        --card-bg: #FFFFFF;
        --soft-bg: #EDF3FF;
        --ink: #162A48;
        --body: #3D4E6B;
        --muted: #718096;
        --border: #E1E7F0;
        --accent: #C7443B;
        --radius-lg: 14px;
        --radius-2xl: 22px;
        --radius-full: 999px;
        --shadow-card: 0 1px 2px rgba(15,23,42,.04), 0 12px 24px -12px rgba(30,50,90,.08);
        --shadow-hover: 0 18px 32px -16px rgba(40,80,180,.16);
        --container: 1200px;
        --font-sans: "PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,Helvetica,Arial,sans-serif;
    }

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

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

    body {
        margin: 0;
        background: var(--page-bg);
        color: var(--body);
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.75;
    }

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

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

    button {
        font-family: inherit;
        cursor: pointer;
        border: 0;
    }

    input,
    textarea {
        font-family: inherit;
    }

    h1,
    h2,
    h3,
    h4,
    p {
        margin: 0;
    }

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

    @media (min-width: 640px) {
        .container-wide {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
    }

    @media (min-width: 1024px) {
        .container-wide {
            padding-left: 2rem;
            padding-right: 2rem;
        }
    }

    :focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 3px;
    }

    .skip-link {
        position: fixed;
        left: -999px;
        top: 0;
        z-index: 200;
        background: var(--ink);
        color: #fff;
        padding: 10px 18px;
        border-radius: 0 0 12px 0;
        transition: left .2s ease;
    }

    .skip-link:focus {
        left: 0;
        color: #fff;
    }

    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 80;
        height: 72px;
        background: rgba(255,255,255,.86);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid transparent;
        transition: box-shadow .25s ease, border-color .25s ease, background .25s ease;
    }

    .site-header.is-scrolled {
        background: rgba(255,255,255,.92);
        border-bottom-color: var(--border);
        box-shadow: 0 8px 28px -18px rgba(30,50,90,.16);
    }

    .logo-square {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 12px;
        color: #fff;
        font-size: 19px;
        font-weight: 800;
        background: linear-gradient(135deg, #2E6FF2, #7BB3FF);
        flex: none;
    }

    .nav-link {
        display: inline-flex;
        align-items: center;
        padding: 9px 15px;
        border-radius: var(--radius-full);
        font-size: 15px;
        font-weight: 600;
        color: var(--body);
        transition: color .2s ease, background .2s ease;
        white-space: nowrap;
    }

    .nav-link:hover {
        color: var(--primary);
        background: var(--soft-bg);
    }

    .nav-link.active {
        color: var(--primary);
        background: rgba(46,111,242,.1);
    }

    .cmd-search {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        height: 40px;
        padding: 0 10px 0 12px;
        border-radius: 10px;
        border: 1px solid var(--border);
        background: #F3F6FB;
        color: #8A96AD;
        font-size: 13px;
        transition: width .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
        width: 200px;
    }

    .cmd-search:hover {
        border-color: var(--sky);
        background: #fff;
    }

    .cmd-search .kbd {
        margin-left: auto;
        font-size: 12px;
        color: #8A96AD;
        border: 1px solid #DDE4EF;
        background: #fff;
        padding: 2px 7px;
        border-radius: 6px;
        flex: none;
    }

    .cmd-search:focus,
    .cmd-search:focus-visible,
    .cmd-search.is-open {
        width: 260px;
        background: #fff;
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(46,111,242,.16);
    }

    @media (max-width: 767px) {
        .cmd-search {
            width: 40px;
            justify-content: center;
            padding: 0;
            border: 0;
            background: transparent;
            color: var(--ink);
        }

        .cmd-search span,
        .cmd-search .kbd {
            display: none;
        }
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        min-height: 44px;
        padding: 0 22px;
        border-radius: 10px;
        font-size: 15px;
        font-weight: 600;
        transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease, box-shadow .25s ease;
        line-height: 1.2;
    }

    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 10px 20px -12px rgba(46,111,242,.7);
    }

    .btn-primary:hover {
        background: var(--primary-dark);
        box-shadow: 0 14px 26px -14px rgba(30,90,215,.8);
    }

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

    .btn-secondary {
        background: #fff;
        border: 1px solid #DDDDEA;
        color: var(--body);
    }

    .btn-secondary:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: #F9FBFF;
    }

    .btn-soft {
        background: rgba(255,255,255,.9);
        border: 1px solid rgba(46,111,242,.18);
        color: var(--primary);
    }

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

    .btn-sm {
        min-height: 38px;
        padding: 0 16px;
        border-radius: 9px;
        font-size: 14px;
    }

    .text-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--primary);
        font-weight: 600;
        font-size: 15px;
        transition: gap .2s ease;
    }

    .text-link:hover {
        color: var(--primary-dark);
        text-decoration: underline;
        text-underline-offset: 5px;
    }

    .text-arrow {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
        transition: color .2s ease, transform .2s ease;
    }

    .text-arrow:hover {
        color: var(--primary-dark);
    }

    .text-arrow svg {
        transition: transform .2s ease;
    }

    .text-arrow:hover svg {
        transform: translateX(3px);
    }

    .section-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 700;
        letter-spacing: .08em;
        color: var(--primary);
        background: rgba(46,111,242,.09);
        padding: 6px 14px;
        border-radius: var(--radius-full);
    }

    .section-title {
        font-size: 30px;
        line-height: 1.28;
        font-weight: 800;
        color: var(--ink);
        letter-spacing: -.01em;
    }

    @media (min-width: 768px) {
        .section-title {
            font-size: 34px;
        }
    }

    .h-display {
        font-size: 38px;
        line-height: 1.18;
        font-weight: 800;
        color: var(--ink);
        letter-spacing: -.02em;
    }

    @media (min-width: 768px) {
        .h-display {
            font-size: 46px;
            line-height: 1.16;
        }
    }

    .card-raised {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-2xl);
        box-shadow: var(--shadow-card);
        transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    }

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

    .theme-card {
        position: relative;
        padding: 26px;
        border: 1px solid var(--border);
        border-radius: var(--radius-2xl);
        background: #fff;
        transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    }

    .theme-card:hover {
        transform: translateY(-3px);
        border-color: #C4D8FE;
        box-shadow: var(--shadow-hover);
    }

    .theme-num {
        font-size: 26px;
        line-height: 1;
        font-weight: 800;
        color: #D7E2F2;
        transition: color .25s ease;
    }

    .theme-card:hover .theme-num {
        color: var(--primary);
    }

    .theme-icon {
        width: 44px;
        height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 13px;
        background: var(--soft-bg);
        color: var(--primary);
        flex: none;
    }

    .tag {
        display: inline-flex;
        align-items: center;
        height: 26px;
        padding: 0 10px;
        border-radius: var(--radius-full);
        background: rgba(46,111,242,.09);
        color: var(--primary);
        font-size: 12px;
        font-weight: 600;
    }

    .tag-rust {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        background: #FDF0EC;
        color: var(--accent);
    }

    .ts-list {
        position: relative;
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .ts-list::before {
        content: "";
        position: absolute;
        left: 22px;
        top: 10px;
        bottom: 10px;
        width: 2px;
        background: linear-gradient(to bottom, rgba(46,111,242,.35), rgba(123,179,255,.08));
        border-radius: var(--radius-full);
    }

    @media (min-width: 640px) {
        .ts-list::before {
            left: 23px;
        }
    }

    .ts-item {
        position: relative;
        padding-left: 64px;
        padding-bottom: 32px;
    }

    .ts-item:last-child {
        padding-bottom: 0;
    }

    .ts-dot {
        position: absolute;
        left: 7px;
        top: 0;
        width: 32px;
        height: 32px;
        border-radius: var(--radius-full);
        background: #fff;
        border: 1.5px solid var(--sky);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        font-size: 12px;
        font-weight: 800;
    }

    .faq-wrap {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: 18px;
        padding: 8px 18px;
    }

    @media (min-width: 768px) {
        .faq-wrap {
            padding: 8px 24px;
        }
    }

    .faq-item {
        border-bottom: 1px solid var(--border);
    }

    .faq-item:last-child {
        border-bottom: 0;
    }

    .faq-q {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        text-align: left;
        background: transparent;
        color: var(--ink);
        font-size: 16px;
        font-weight: 650;
        padding: 20px 0;
        transition: color .2s ease;
    }

    .faq-item.open .faq-q {
        color: var(--primary);
    }

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

    .faq-a {
        display: grid;
        grid-template-rows: 0fr;
        transition: grid-template-rows .3s ease;
    }

    .faq-item.open .faq-a {
        grid-template-rows: 1fr;
    }

    .faq-answer {
        overflow: hidden;
    }

    .faq-answer-inner {
        padding: 0 0 20px;
        font-size: 15px;
        line-height: 1.8;
        color: var(--body);
        max-width: 92%;
    }

    .faq-icon {
        position: relative;
        flex: none;
        width: 30px;
        height: 30px;
        border: 1px solid var(--border);
        border-radius: 50%;
        background: #F8FAFE;
        color: var(--primary);
        transition: transform .25s ease, background .25s ease, border-color .25s ease;
    }

    .faq-item.open .faq-icon {
        transform: rotate(45deg);
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
    }

    .faq-icon::before,
    .faq-icon::after {
        content: "";
        position: absolute;
        left: 50%;
        top: 50%;
        width: 11px;
        height: 1.5px;
        background: currentColor;
        transform: translate(-50%, -50%);
        border-radius: 4px;
    }

    .faq-icon::after {
        width: 1.5px;
        height: 11px;
    }

    .stat-cell {
        padding: 18px 8px;
        text-align: left;
    }

    .stat-value {
        font-size: 26px;
        font-weight: 800;
        line-height: 1.2;
        color: var(--ink);
    }

    @media (min-width: 768px) {
        .stat-value {
            font-size: 30px;
        }
    }

    .stat-label {
        margin-top: 5px;
        font-size: 13px;
        color: var(--muted);
    }

    .hero-bg-dots {
        background-image: radial-gradient(rgba(123,179,255,.16) 1px, transparent 1px);
        background-size: 20px 20px;
    }

    .hero-orbit {
        position: absolute;
        border-radius: 50%;
        pointer-events: none;
    }

    .mobile-menu-panel {
        position: fixed;
        top: 72px;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 70;
        background: #fff;
        overflow-y: auto;
        border-top: 1px solid var(--border);
    }

    .mobile-cta {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 60;
        transform: translateY(110%);
        transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s ease;
        background: #fff;
        border-top: 1px solid var(--border);
        box-shadow: 0 -12px 30px -18px rgba(30,50,90,.3);
    }

    .mobile-cta.is-visible {
        transform: translateY(0);
    }

    .cmd-backdrop {
        position: fixed;
        inset: 0;
        z-index: 90;
        background: rgba(15,23,42,.45);
        backdrop-filter: blur(2px);
    }

    .cmd-panel {
        position: fixed;
        z-index: 95;
        top: 90px;
        left: 50%;
        transform: translateX(-50%);
        width: min(560px, calc(100vw - 28px));
        background: #fff;
        border: 1px solid var(--border);
        border-radius: 18px;
        box-shadow: 0 30px 70px -32px rgba(30,50,90,.4);
        overflow: hidden;
    }

    .cmd-head {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 14px 16px;
        border-bottom: 1px solid var(--border);
        color: var(--muted);
    }

    .cmd-list {
        padding: 8px;
    }

    .cmd-group-label {
        padding: 8px 12px 4px;
        font-size: 12px;
        font-weight: 700;
        letter-spacing: .06em;
        color: #97A3B5;
    }

    .cmd-link {
        display: flex;
        align-items: center;
        gap: 12px;
        width: 100%;
        text-align: left;
        border-radius: 10px;
        padding: 10px 12px;
        color: var(--body);
        font-size: 14px;
        font-weight: 600;
        transition: background .15s ease, color .15s ease;
    }

    .cmd-link:hover {
        background: var(--soft-bg);
        color: var(--primary);
    }

    .text-shadow-river {
        text-shadow: 0 4px 24px rgba(15,23,42,.12);
    }

    .footer-link {
        color: #A6B7D0;
        transition: color .2s ease;
    }

    .footer-link:hover {
        color: #fff;
    }