/* roulang page: index */
:root {
            --ky-bg-primary: #070b12;
            --ky-bg-secondary: #0d1420;
            --ky-bg-panel: #131c2e;
            --ky-bg-footer: #0a0e16;
            --ky-primary: #19e3c2;
            --ky-secondary: #8b5cf6;
            --ky-accent: #f43f9e;
            --ky-success: #34d399;
            --ky-text-primary: #e6edf6;
            --ky-text-secondary: #93a0b4;
            --ky-text-muted: #5c6b83;
            --ky-border: rgba(255, 255, 255, 0.07);
            --ky-radius-lg: 16px;
            --ky-radius-md: 12px;
            --ky-radius-sm: 8px;
            --ky-shadow-base: 0 2px 8px rgba(0, 0, 0, 0.4);
            --ky-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(25, 227, 194, 0.1);
            --ky-font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --ky-font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
            --ky-nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--ky-font-sans);
            background: var(--ky-bg-primary);
            color: var(--ky-text-primary);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--ky-radius-md);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .ky-section {
            padding: 96px 0;
            position: relative;
        }

        .ky-section-head {
            text-align: center;
            margin-bottom: 56px;
        }

        .ky-section-head .ky-section-sub {
            color: var(--ky-text-secondary);
            font-size: 16px;
            max-width: 640px;
            margin: 8px auto 0;
        }

        .ky-section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            position: relative;
            display: inline-block;
            margin: 0;
        }

        .ky-section-title::before {
            content: "";
            display: inline-block;
            width: 4px;
            height: 22px;
            background: var(--ky-primary);
            border-radius: 4px;
            margin-right: 14px;
            vertical-align: -2px;
            box-shadow: 0 0 12px rgba(25, 227, 194, 0.5);
        }

        .ky-btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--ky-radius-sm);
            background: var(--ky-primary);
            color: #041018;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 0 20px rgba(25, 227, 194, 0.35);
        }

        .ky-btn-primary:hover {
            background: #35f0d2;
            color: #041018;
            box-shadow: 0 0 30px rgba(25, 227, 194, 0.55);
            transform: translateY(-1px);
        }

        .ky-btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(25, 227, 194, 0.3);
        }

        .ky-btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--ky-radius-sm);
            background: transparent;
            color: var(--ky-text-primary);
            font-size: 15px;
            font-weight: 500;
            border: 1px solid #2a3a52;
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .ky-btn-outline:hover {
            border-color: var(--ky-primary);
            color: var(--ky-primary);
            background: rgba(25, 227, 194, 0.06);
        }

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

        .ky-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(139, 92, 246, 0.15);
            color: #a78bfa;
            font-size: 12px;
            font-weight: 500;
            line-height: 1.5;
        }

        .ky-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--ky-nav-height);
            background: rgba(7, 11, 18, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ky-border);
            z-index: 1000;
        }

        .ky-header::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--ky-primary), var(--ky-secondary));
            opacity: 0.8;
        }

        .ky-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
        }

        .ky-logo {
            display: flex;
            flex-direction: column;
            justify-content: center;
            line-height: 1.2;
            flex-shrink: 0;
        }

        .ky-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
        }

        .ky-logo-text span {
            color: var(--ky-primary);
        }

        .ky-logo-sub {
            font-size: 11px;
            letter-spacing: 0.2em;
            color: var(--ky-text-muted);
            text-transform: uppercase;
            margin-top: 2px;
        }

        .ky-nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .ky-nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            font-size: 15px;
            color: var(--ky-text-secondary);
            border-radius: var(--ky-radius-sm);
            position: relative;
            transition: color 0.25s ease, text-shadow 0.25s ease;
            background: none;
            border: none;
            cursor: pointer;
        }

        .ky-nav-link:hover {
            color: #fff;
            text-shadow: 0 0 12px rgba(25, 227, 194, 0.5);
        }

        .ky-nav-link.active {
            color: #fff;
            text-shadow: 0 0 12px rgba(25, 227, 194, 0.4);
        }

        .ky-nav-link.active::after {
            content: "";
            position: absolute;
            bottom: -4px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--ky-primary);
            box-shadow: 0 0 12px rgba(25, 227, 194, 0.7);
            border-radius: 2px;
        }

        .ky-nav-new {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ky-accent);
            margin-left: 6px;
            box-shadow: 0 0 8px rgba(244, 63, 158, 0.6);
        }

        .ky-nav-cta {
            margin-left: 8px;
            flex-shrink: 0;
        }

        .ky-nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-sm);
            background: transparent;
            color: var(--ky-text-primary);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all 0.25s ease;
        }

        .ky-nav-toggle:hover {
            border-color: var(--ky-primary);
            color: var(--ky-primary);
        }

        .ky-mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 100%;
            height: 100vh;
            background: var(--ky-bg-secondary);
            z-index: 1100;
            transition: right 0.35s ease;
            display: flex;
            flex-direction: column;
            padding: 24px;
        }

        .ky-mobile-drawer.open {
            right: 0;
        }

        .ky-drawer-close {
            align-self: flex-end;
            width: 40px;
            height: 40px;
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-sm);
            background: transparent;
            color: rgba(255, 255, 255, 0.4);
            font-size: 18px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .ky-drawer-close:hover {
            color: var(--ky-primary);
            border-color: var(--ky-primary);
        }

        .ky-drawer-nav {
            list-style: none;
            padding: 40px 0 0;
            margin: 0;
            flex: 1;
        }

        .ky-drawer-nav li {
            border-bottom: 1px solid var(--ky-border);
        }

        .ky-drawer-nav a {
            display: block;
            padding: 18px 12px;
            font-size: 18px;
            font-weight: 600;
            color: var(--ky-text-secondary);
            position: relative;
        }

        .ky-drawer-nav a:hover,
        .ky-drawer-nav a.active {
            color: var(--ky-primary);
        }

        .ky-drawer-nav a.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 12px;
            bottom: 12px;
            width: 3px;
            background: var(--ky-primary);
            border-radius: 3px;
        }

        .ky-hero {
            position: relative;
            padding: 160px 0 96px;
            overflow: hidden;
            background: var(--ky-bg-primary);
        }

        .ky-hero::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -120px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.18), transparent 70%);
            pointer-events: none;
        }

        .ky-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            opacity: 0.5;
            pointer-events: none;
        }

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

        .ky-hero-content {
            padding-right: 20px;
        }

        .ky-hero-h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin: 0 0 20px;
        }

        .ky-hero-h1 .ky-highlight {
            color: var(--ky-primary);
        }

        .ky-hero-sub {
            font-size: 17px;
            color: var(--ky-text-secondary);
            line-height: 1.9;
            margin-bottom: 36px;
            max-width: 520px;
        }

        .ky-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .ky-hero-trust {
            font-size: 14px;
            color: var(--ky-text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .ky-hero-trust::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--ky-success);
            box-shadow: 0 0 8px rgba(52, 211, 153, 0.6);
            flex-shrink: 0;
        }

        .ky-hero-visual {
            position: relative;
            border-radius: var(--ky-radius-lg);
            overflow: hidden;
            height: 420px;
            background-size: cover;
            background-position: center;
            border: 1px solid rgba(25, 227, 194, 0.15);
            box-shadow: 0 0 40px rgba(139, 92, 246, 0.15);
        }

        .ky-hero-visual::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 11, 18, 0.2), rgba(7, 11, 18, 0.65));
        }

        .ky-hero-visual-inner {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 28px;
            z-index: 2;
        }

        .ky-hero-visual-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .ky-hero-visual-text {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        .ky-pain-card {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-md);
            padding: 32px;
            height: 100%;
            position: relative;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }

        .ky-pain-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ky-shadow-hover);
            border-color: rgba(25, 227, 194, 0.2);
        }

        .ky-pain-num {
            font-family: var(--ky-font-mono);
            font-size: 16px;
            color: var(--ky-primary);
            font-weight: 600;
            margin-bottom: 20px;
            display: block;
        }

        .ky-pain-title {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .ky-pain-text {
            font-size: 15px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .ky-pain-card::after {
            content: "";
            position: absolute;
            bottom: 20px;
            left: 32px;
            right: 32px;
            border-bottom: 1px dashed rgba(255, 255, 255, 0.12);
        }

        .ky-advantage-card {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-lg);
            overflow: hidden;
            height: 100%;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

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

        .ky-advantage-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }

        .ky-advantage-card-content {
            padding: 28px;
        }

        .ky-advantage-card-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .ky-advantage-card-content p {
            font-size: 15px;
            color: var(--ky-text-secondary);
            margin: 0;
            line-height: 1.8;
        }

        .ky-solution-card {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-lg);
            padding: 32px;
            height: 100%;
            position: relative;
            overflow: hidden;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            border-top: 3px solid var(--ky-primary);
        }

        .ky-solution-card::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.12), transparent 70%);
            pointer-events: none;
        }

        .ky-solution-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ky-shadow-hover);
            border-top-color: var(--ky-secondary);
        }

        .ky-solution-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--ky-radius-md);
            background: rgba(25, 227, 194, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--ky-primary);
            margin-bottom: 20px;
            border: 1px solid rgba(25, 227, 194, 0.15);
        }

        .ky-solution-card:hover .ky-solution-icon {
            background: rgba(139, 92, 246, 0.1);
            border-color: rgba(139, 92, 246, 0.3);
            color: var(--ky-secondary);
        }

        .ky-solution-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .ky-solution-text {
            font-size: 15px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .ky-solution-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ky-primary);
            transition: gap 0.25s ease;
        }

        .ky-solution-link:hover {
            gap: 12px;
            color: #35f0d2;
        }

        .ky-solution-badge {
            position: absolute;
            top: 20px;
            right: 20px;
        }

        .ky-stats {
            background: var(--ky-bg-secondary);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .ky-stats::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--ky-primary), var(--ky-secondary));
            opacity: 0.8;
        }

        .ky-stats::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.04;
            pointer-events: none;
        }

        .ky-stats .container {
            position: relative;
            z-index: 1;
        }

        .ky-stat-item {
            text-align: center;
            padding: 24px 16px;
            position: relative;
        }

        .ky-stat-item:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 25%;
            height: 50%;
            width: 1px;
            background: var(--ky-border);
        }

        .ky-stat-num {
            font-family: var(--ky-font-mono);
            font-size: 40px;
            font-weight: 700;
            color: var(--ky-primary);
            line-height: 1.2;
            text-shadow: 0 0 20px rgba(25, 227, 194, 0.3);
        }

        .ky-stat-label {
            font-size: 14px;
            color: var(--ky-text-secondary);
            margin-top: 8px;
        }

        .ky-stat-line {
            width: 48px;
            height: 2px;
            background: linear-gradient(90deg, var(--ky-primary), var(--ky-secondary));
            margin: 16px auto 0;
            border-radius: 2px;
        }

        .ky-news-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .ky-news-item {
            display: flex;
            align-items: flex-start;
            padding: 24px 20px;
            border-bottom: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-sm);
            transition: background 0.25s ease;
            gap: 20px;
        }

        .ky-news-item:hover {
            background: var(--ky-bg-secondary);
        }

        .ky-news-date {
            font-family: var(--ky-font-mono);
            font-size: 14px;
            color: var(--ky-primary);
            white-space: nowrap;
            padding-top: 4px;
            flex-shrink: 0;
        }

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

        .ky-news-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            display: block;
            line-height: 1.5;
            transition: color 0.25s ease;
        }

        .ky-news-item:hover .ky-news-title {
            color: var(--ky-primary);
        }

        .ky-news-summary {
            font-size: 14px;
            color: var(--ky-text-secondary);
            display: block;
            margin-top: 4px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .ky-news-category {
            display: inline-flex;
            align-items: center;
            padding: 3px 14px;
            border-radius: 999px;
            background: rgba(139, 92, 246, 0.12);
            color: #a78bfa;
            font-size: 12px;
            white-space: nowrap;
        }

        .ky-news-empty {
            border: 1px dashed var(--ky-border);
            border-radius: var(--ky-radius-md);
            padding: 48px 24px;
            text-align: center;
            color: var(--ky-text-muted);
            font-size: 15px;
            margin: 24px 0;
            min-height: 120px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .ky-news-empty i {
            font-size: 28px;
            color: var(--ky-text-muted);
            opacity: 0.5;
        }

        .ky-cta-section {
            padding: 64px 0 32px;
        }

        .ky-cta-banner {
            border-radius: var(--ky-radius-lg);
            border: 1px solid transparent;
            background: linear-gradient(var(--ky-bg-secondary), var(--ky-bg-secondary)) padding-box,
                linear-gradient(135deg, rgba(25, 227, 194, 0.5), rgba(139, 92, 246, 0.5)) border-box;
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .ky-cta-banner::before {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.15), transparent 70%);
            pointer-events: none;
        }

        .ky-cta-title {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .ky-cta-text {
            font-size: 15px;
            color: var(--ky-text-secondary);
            margin: 0;
        }

        .ky-privacy {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 20px 0 0;
            font-size: 14px;
            color: var(--ky-text-muted);
            text-align: center;
        }

        .ky-privacy i {
            color: var(--ky-success);
            font-size: 14px;
        }

        .ky-faq-section {
            padding: 64px 0 96px;
        }

        .ky-faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .ky-faq-item {
            padding: 28px 0;
            border-bottom: 1px solid var(--ky-border);
        }

        .ky-faq-item:first-child {
            padding-top: 0;
        }

        .ky-faq-q {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .ky-faq-q::before {
            content: "Q.";
            color: var(--ky-primary);
            font-weight: 700;
            margin-right: 8px;
            font-family: var(--ky-font-mono);
        }

        .ky-faq-a {
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 1.9;
            padding-left: 28px;
            margin: 0;
        }

        .ky-faq-a::before {
            content: "A.";
            color: var(--ky-text-muted);
            font-weight: 600;
            margin-right: 8px;
            font-family: var(--ky-font-mono);
            display: inline-block;
            width: 20px;
            margin-left: -28px;
        }

        .ky-footer {
            background: var(--ky-bg-footer);
            border-top: 1px solid var(--ky-border);
            padding: 64px 0 0;
        }

        .ky-footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .ky-footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .ky-footer-brand span {
            color: var(--ky-primary);
        }

        .ky-footer-desc {
            font-size: 13px;
            color: var(--ky-text-muted);
            line-height: 1.8;
            margin: 0;
            max-width: 280px;
        }

        .ky-footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .ky-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ky-footer-links li {
            margin-bottom: 10px;
        }

        .ky-footer-links a {
            font-size: 14px;
            color: var(--ky-text-secondary);
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

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

        .ky-footer-contact {
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 2;
        }

        .ky-footer-contact i {
            color: var(--ky-primary);
            width: 20px;
            margin-right: 6px;
        }

        .ky-footer-copyright {
            border-top: 1px solid var(--ky-border);
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: var(--ky-text-muted);
        }

        .ky-modal .modal-dialog {
            max-width: 520px;
        }

        .ky-modal .modal-content {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-lg);
            overflow: hidden;
            position: relative;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
        }

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

        .ky-modal-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 28px 0;
        }

        .ky-modal-head h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin: 0;
        }

        .ky-modal-head .btn-close {
            filter: invert(1) grayscale(1) opacity(0.4);
            transition: filter 0.25s ease;
        }

        .ky-modal-head .btn-close:hover {
            filter: invert(1) grayscale(1) opacity(0.8);
        }

        .ky-modal-body {
            padding: 16px 28px 32px;
        }

        .ky-modal-sub {
            font-size: 14px;
            color: var(--ky-text-secondary);
            margin-bottom: 24px;
        }

        .ky-form-label {
            font-size: 13px;
            color: var(--ky-text-secondary);
            margin-bottom: 6px;
            display: block;
        }

        .ky-form-control {
            width: 100%;
            height: 44px;
            padding: 0 16px;
            border-radius: 10px;
            background: var(--ky-bg-panel);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--ky-text-primary);
            font-size: 14px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .ky-form-control:focus {
            outline: none;
            border-color: var(--ky-primary);
            box-shadow: 0 0 0 3px rgba(25, 227, 194, 0.15);
        }

        textarea.ky-form-control {
            height: auto;
            padding: 12px 16px;
            resize: vertical;
            min-height: 80px;
        }

        .ky-form-control::placeholder {
            color: rgba(92, 107, 131, 0.7);
        }

        .ky-modal-backdrop {
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(4px);
        }

        .modal.fade .modal-dialog {
            transform: translateY(12px);
            opacity: 0;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .modal.show .modal-dialog {
            transform: translateY(0);
            opacity: 1;
        }

        ::-webkit-scrollbar {
            width: 6px;
            background: var(--ky-bg-primary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--ky-primary);
            border-radius: 6px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: #35f0d2;
        }

        @media (max-width: 992px) {
            .ky-section {
                padding: 72px 0;
            }

            .ky-hero {
                padding: 140px 0 72px;
            }

            .ky-hero-h1 {
                font-size: 34px;
            }

            .ky-hero-visual {
                height: 340px;
                margin-top: 40px;
            }

            .ky-nav-menu,
            .ky-nav-cta {
                display: none;
            }

            .ky-nav-toggle {
                display: flex;
            }

            .ky-stat-item:not(:last-child)::after {
                display: none;
            }

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

            .ky-cta-banner {
                padding: 40px 32px;
            }
        }

        @media (max-width: 768px) {
            .ky-section {
                padding: 56px 0;
            }

            .ky-section-title {
                font-size: 26px;
            }

            .ky-hero {
                padding: 120px 0 56px;
            }

            .ky-hero-h1 {
                font-size: 30px;
            }

            .ky-hero-sub {
                font-size: 16px;
            }

            .ky-hero-actions .ky-btn-primary,
            .ky-hero-actions .ky-btn-outline {
                width: 100%;
            }

            .ky-stat-num {
                font-size: 32px;
            }

            .ky-cta-banner {
                flex-direction: column;
                text-align: center;
                align-items: center;
                padding: 36px 24px;
            }

            .ky-cta-title {
                font-size: 24px;
            }

            .ky-news-item {
                flex-direction: column;
                gap: 10px;
                padding: 20px 16px;
            }

            .ky-news-date {
                white-space: normal;
            }

            .ky-news-category {
                align-self: flex-start;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .ky-hero-h1 {
                font-size: 28px;
            }

            .ky-hero-visual {
                height: 260px;
            }

            .ky-section-title {
                font-size: 22px;
            }

            .ky-footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .ky-footer-contact {
                font-size: 13px;
            }

            .ky-modal .modal-content {
                margin: 0 16px;
            }

            .ky-privacy {
                font-size: 13px;
            }
        }

        @media (max-width: 400px) {
            .ky-modal .modal-dialog {
                margin: 0;
            }

            .ky-modal .modal-content {
                margin: 0;
                border-radius: 16px 16px 0 0;
                min-height: 60vh;
            }

            .ky-modal-body {
                padding: 12px 16px 24px;
            }

            .ky-modal-head {
                padding: 20px 16px 0;
            }
        }

/* roulang page: category1 */
:root {
            --ky-bg: #070B12;
            --ky-bg-secondary: #0D1420;
            --ky-bg-panel: #131C2E;
            --ky-primary: #19E3C2;
            --ky-secondary: #8B5CF6;
            --ky-accent: #F43F9E;
            --ky-text: #E6EDF6;
            --ky-text-secondary: #93A0B4;
            --ky-text-muted: #5C6B83;
            --ky-border: rgba(255, 255, 255, 0.07);
            --ky-border-light: rgba(255, 255, 255, 0.12);
            --ky-radius-lg: 16px;
            --ky-radius-md: 12px;
            --ky-radius-sm: 8px;
            --ky-font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --ky-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
            --ky-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
            --ky-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(25, 227, 194, 0.1);
            --ky-glow: 0 0 20px rgba(25, 227, 194, 0.35);
            --ky-section-padding: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--ky-font);
            background: var(--ky-bg);
            color: var(--ky-text);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: var(--ky-primary);
            transition: color 0.25s ease;
        }

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

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

        .ky-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(7, 11, 18, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ky-border);
        }

        .ky-header::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 2px;
            background: linear-gradient(90deg, var(--ky-primary), var(--ky-secondary));
            opacity: 0.8;
        }

        .ky-header-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            position: relative;
        }

        .ky-logo {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            flex-shrink: 0;
        }

        .ky-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
        }

        .ky-logo-text span {
            color: var(--ky-primary);
        }

        .ky-logo-sub {
            font-size: 11px;
            color: var(--ky-text-muted);
            letter-spacing: 0.2em;
            text-transform: uppercase;
        }

        .ky-nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            margin: 0;
            padding: 0;
        }

        .ky-nav-link {
            font-size: 15px;
            color: var(--ky-text-secondary);
            padding: 8px 2px;
            position: relative;
            transition: color 0.25s ease;
            display: inline-block;
        }

        .ky-nav-link:hover {
            color: #fff;
        }

        .ky-nav-link.active {
            color: #fff;
            text-shadow: 0 0 12px rgba(25, 227, 194, 0.35);
        }

        .ky-nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -4px;
            height: 2px;
            background: var(--ky-primary);
            box-shadow: 0 0 12px rgba(25, 227, 194, 0.6);
        }

        .ky-nav-new {
            display: inline-block;
            width: 10px;
            height: 10px;
            background: var(--ky-accent);
            border-radius: 50%;
            margin-left: 4px;
            box-shadow: 0 0 8px rgba(244, 63, 158, 0.6);
            vertical-align: 1px;
        }

        .ky-btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            background: var(--ky-primary);
            color: #041018;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--ky-radius-sm);
            box-shadow: var(--ky-glow);
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .ky-btn-primary:hover {
            background: #2bf0d0;
            color: #041018;
            transform: translateY(-1px);
            box-shadow: 0 0 30px rgba(25, 227, 194, 0.5);
        }

        .ky-btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(25, 227, 194, 0.3);
        }

        .ky-nav-toggle {
            display: none;
            font-size: 22px;
            color: var(--ky-text);
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--ky-border);
            border-radius: 8px;
            background: var(--ky-bg-panel);
            transition: border-color 0.25s ease;
        }

        .ky-nav-toggle:hover {
            border-color: var(--ky-primary);
        }

        .ky-category-hero {
            position: relative;
            padding: 140px 0 64px;
            background: var(--ky-bg-secondary);
            border-bottom: 1px solid var(--ky-border);
            overflow: hidden;
        }

        .ky-category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 40px 40px;
            opacity: 0.5;
            pointer-events: none;
        }

        .ky-category-hero::after {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.3), transparent 70%);
            pointer-events: none;
        }

        .ky-breadcrumb {
            font-size: 14px;
            color: var(--ky-text-muted);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .ky-breadcrumb a {
            color: var(--ky-text-secondary);
        }

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

        .ky-breadcrumb .sep {
            margin: 0 10px;
            color: var(--ky-text-muted);
        }

        .ky-breadcrumb .current {
            color: var(--ky-text);
        }

        .ky-category-hero h1 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            position: relative;
            z-index: 1;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .ky-category-hero .lead {
            font-size: 15px;
            color: var(--ky-text-secondary);
            max-width: 680px;
            position: relative;
            z-index: 1;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .ky-section {
            padding: var(--ky-section-padding) 0;
        }

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

        .ky-section-head {
            margin-bottom: 48px;
            max-width: 760px;
        }

        .ky-section-head.centered {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .ky-section-head.centered h2 {
            padding-left: 0;
        }

        .ky-section-head.centered h2::before {
            display: none;
        }

        .ky-kicker {
            font-size: 14px;
            color: var(--ky-primary);
            font-family: var(--ky-mono);
            margin-bottom: 8px;
            letter-spacing: 0.1em;
        }

        .ky-section-head h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 12px;
            position: relative;
            padding-left: 16px;
        }

        .ky-section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            background: linear-gradient(180deg, var(--ky-primary), var(--ky-secondary));
            border-radius: 2px;
        }

        .ky-section-head p {
            font-size: 16px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .ky-feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .ky-feature-card {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-md);
            padding: 32px 28px;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
            position: relative;
            height: 100%;
        }

        .ky-feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ky-shadow-hover);
            border-color: rgba(25, 227, 194, 0.3);
        }

        .ky-feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(25, 227, 194, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--ky-primary);
            margin-bottom: 20px;
        }

        .ky-feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }

        .ky-feature-card p {
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .ky-alternate-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

        .ky-alternate-block:last-child {
            margin-bottom: 0;
        }

        .ky-alternate-block.reverse .ky-alt-image {
            order: 2;
        }

        .ky-alternate-block.reverse .ky-alt-content {
            order: 1;
        }

        .ky-alt-image {
            position: relative;
            border-radius: var(--ky-radius-lg);
            overflow: hidden;
            border: 1px solid var(--ky-border);
            box-shadow: var(--ky-shadow);
        }

        .ky-alt-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(25, 227, 194, 0.08), rgba(139, 92, 246, 0.08));
            border-radius: var(--ky-radius-lg);
            pointer-events: none;
        }

        .ky-alt-image img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            border-radius: var(--ky-radius-lg);
        }

        .ky-alt-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--ky-secondary);
            background: rgba(139, 92, 246, 0.15);
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .ky-alt-content h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .ky-alt-content p {
            font-size: 15px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .ky-alt-content ul {
            list-style: none;
            padding: 0;
            margin-bottom: 16px;
        }

        .ky-alt-content ul li {
            font-size: 14px;
            color: var(--ky-text-secondary);
            padding-left: 20px;
            position: relative;
            margin-bottom: 8px;
        }

        .ky-alt-content ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 9px;
            width: 6px;
            height: 6px;
            background: var(--ky-primary);
            border-radius: 1px;
        }

        .ky-reading-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .ky-reading-card {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-md);
            overflow: hidden;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
            display: block;
            height: 100%;
        }

        .ky-reading-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ky-shadow-hover);
            border-color: rgba(25, 227, 194, 0.25);
        }

        .ky-reading-cover {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--ky-border);
        }

        .ky-reading-body {
            padding: 24px;
        }

        .ky-reading-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .ky-reading-body p {
            font-size: 13px;
            color: var(--ky-text-secondary);
            margin-bottom: 12px;
            line-height: 1.7;
        }

        .ky-reading-date {
            font-size: 12px;
            color: var(--ky-text-muted);
            font-family: var(--ky-mono);
        }

        .ky-faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .ky-faq-item {
            border-bottom: 1px solid var(--ky-border);
            padding: 28px 0;
        }

        .ky-faq-item:first-child {
            padding-top: 0;
        }

        .ky-faq-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .ky-faq-question {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            display: flex;
            gap: 12px;
            align-items: baseline;
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .ky-faq-question .q-mark {
            color: var(--ky-primary);
            font-family: var(--ky-mono);
            font-weight: 700;
            flex-shrink: 0;
        }

        .ky-faq-answer {
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            padding-left: 28px;
        }

        .ky-faq-answer .a-mark {
            color: var(--ky-text-muted);
            font-family: var(--ky-mono);
            font-weight: 600;
            margin-right: 8px;
        }

        .ky-cta-banner {
            position: relative;
            background: linear-gradient(#0D1420, #0D1420) padding-box,
                linear-gradient(135deg, var(--ky-primary), var(--ky-secondary), var(--ky-accent)) border-box;
            border: 1px solid transparent;
            border-radius: var(--ky-radius-lg);
            padding: 56px 48px;
            text-align: center;
            overflow: hidden;
        }

        .ky-cta-banner h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .ky-cta-banner p {
            font-size: 15px;
            color: var(--ky-text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .ky-footer {
            background: #0A0E16;
            border-top: 1px solid var(--ky-border);
            padding: 64px 0 0;
        }

        .ky-footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .ky-footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .ky-footer-desc {
            font-size: 13px;
            color: var(--ky-text-muted);
            line-height: 1.7;
            max-width: 300px;
            margin-bottom: 0;
        }

        .ky-footer-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .ky-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .ky-footer-links li {
            margin-bottom: 10px;
        }

        .ky-footer-links a {
            font-size: 14px;
            color: var(--ky-text-secondary);
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

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

        .ky-footer-contact {
            font-size: 14px;
            color: var(--ky-text-secondary);
        }

        .ky-footer-contact div {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .ky-footer-contact i {
            color: var(--ky-primary);
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }

        .ky-footer-copyright {
            border-top: 1px solid var(--ky-border);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: var(--ky-text-muted);
            margin-bottom: 0;
        }

        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

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

        ::-webkit-scrollbar-thumb {
            background: rgba(25, 227, 194, 0.4);
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(25, 227, 194, 0.6);
        }

        @media (max-width: 992px) {
            :root {
                --ky-section-padding: 72px;
            }

            .ky-feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .ky-reading-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .ky-alternate-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .ky-alternate-block.reverse .ky-alt-image {
                order: 1;
            }

            .ky-alternate-block.reverse .ky-alt-content {
                order: 2;
            }

            .ky-footer-inner {
                grid-template-columns: 1fr 1fr;
            }
        }

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

            .ky-nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                bottom: 0;
                background: #0D1420;
                flex-direction: column;
                padding: 32px 24px;
                gap: 0;
                border-bottom: 1px solid var(--ky-border);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                z-index: 999;
                overflow-y: auto;
                height: calc(100vh - 72px);
            }

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

            .ky-nav-menu li {
                margin-bottom: 4px;
            }

            .ky-nav-link {
                display: block;
                padding: 14px 8px;
                font-size: 17px;
                border-bottom: 1px solid var(--ky-border);
            }

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

            .ky-nav-link.active {
                color: var(--ky-primary);
                padding-left: 12px;
                border-left: 3px solid var(--ky-primary);
                text-shadow: none;
            }

            .ky-nav-cta {
                display: none;
            }

            .ky-category-hero {
                padding: 120px 0 48px;
            }

            .ky-category-hero h1 {
                font-size: 26px;
            }

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

            :root {
                --ky-section-padding: 56px;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }

            .ky-header-inner {
                padding: 0 16px;
            }

            .ky-feature-grid {
                grid-template-columns: 1fr;
            }

            .ky-reading-grid {
                grid-template-columns: 1fr;
            }

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

            .ky-cta-banner {
                padding: 40px 24px;
            }

            .ky-cta-banner h2 {
                font-size: 22px;
            }

            .ky-alternate-block {
                gap: 24px;
            }

            .ky-alt-image img {
                height: 220px;
            }

            .ky-alt-content h3 {
                font-size: 20px;
            }
        }

/* roulang page: article */
:root {
  --ky-bg: #070B12;
  --ky-bg-secondary: #0D1420;
  --ky-bg-panel: #131C2E;
  --ky-primary: #19E3C2;
  --ky-primary-dark: #041018;
  --ky-purple: #8B5CF6;
  --ky-magenta: #F43F9E;
  --ky-success: #34D399;
  --ky-text: #E6EDF6;
  --ky-text-secondary: #93A0B4;
  --ky-text-muted: #5C6B83;
  --ky-border: rgba(255, 255, 255, 0.07);
  --ky-border-light: rgba(255, 255, 255, 0.08);
  --ky-radius-lg: 16px;
  --ky-radius-md: 12px;
  --ky-radius-sm: 8px;
  --ky-radius-input: 10px;
  --ky-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  --ky-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(25, 227, 194, 0.1);
  --ky-glow: 0 0 20px rgba(25, 227, 194, 0.35);
  --ky-transition: 0.25s ease;
  --ky-container: 1200px;
  --ky-font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --ky-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--ky-font-family);
  background-color: var(--ky-bg);
  color: var(--ky-text);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--ky-primary);
  text-decoration: none;
}
a:hover {
  color: #5befd5;
}
button,
input,
select,
textarea {
  font-family: inherit;
}
.container {
  max-width: var(--ky-container);
  margin: 0 auto;
  padding: 0 24px;
}
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--ky-bg);
}
::-webkit-scrollbar-thumb {
  background: rgba(25, 227, 194, 0.3);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(25, 227, 194, 0.5);
}

/* ---------- 按钮 ---------- */
.ky-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--ky-radius-sm);
  background: var(--ky-primary);
  color: var(--ky-primary-dark);
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 0 20px rgba(25, 227, 194, 0.35);
  transition: box-shadow var(--ky-transition), transform var(--ky-transition), background-color var(--ky-transition);
}
.ky-btn-primary:hover {
  background: #22f0cf;
  color: var(--ky-primary-dark);
  box-shadow: 0 0 30px rgba(25, 227, 194, 0.5);
  transform: translateY(-1px);
}
.ky-btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 12px rgba(25, 227, 194, 0.3);
}
.ky-btn-primary:focus-visible,
.ky-btn-secondary:focus-visible {
  outline: 2px solid var(--ky-primary);
  outline-offset: 2px;
}
.ky-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--ky-radius-sm);
  background: transparent;
  color: var(--ky-text-secondary);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid #2A3A52;
  cursor: pointer;
  text-decoration: none;
  transition: border-color var(--ky-transition), color var(--ky-transition), box-shadow var(--ky-transition);
}
.ky-btn-secondary:hover {
  border-color: var(--ky-primary);
  color: var(--ky-primary);
}
.ky-btn-secondary:active {
  transform: translateY(1px);
}

/* ---------- 顶部导航 ---------- */
.ky-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(7, 11, 18, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--ky-border);
}
.ky-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, rgba(25, 227, 194, 0.7), rgba(139, 92, 246, 0.7));
  pointer-events: none;
  z-index: 1;
}
.ky-header-inner {
  max-width: var(--ky-container);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: relative;
}
.ky-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
  line-height: 1;
  flex-shrink: 0;
}
.ky-logo-text {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  font-family: var(--ky-font-family);
  letter-spacing: 0;
}
.ky-logo-text span {
  color: var(--ky-primary);
}
.ky-logo-sub {
  font-size: 11px;
  color: var(--ky-text-secondary);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-top: 4px;
}
.ky-nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 4px;
}
.ky-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ky-text-secondary);
  font-size: 15px;
  font-weight: 400;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 6px;
  position: relative;
  transition: color 0.2s ease;
}
.ky-nav-link:hover {
  color: #fff;
}
.ky-nav-link.active {
  color: #fff;
  text-shadow: 0 0 12px rgba(25, 227, 194, 0.6);
}
.ky-nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -2px;
  height: 2px;
  background: var(--ky-primary);
  box-shadow: 0 0 8px rgba(25, 227, 194, 0.6);
  border-radius: 2px;
}
.ky-nav-new {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--ky-magenta);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(244, 63, 158, 0.6);
  vertical-align: middle;
  margin-left: 2px;
}
.ky-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  padding: 8px 10px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.ky-nav-toggle:hover {
  color: var(--ky-primary);
  background: rgba(255, 255, 255, 0.05);
}
.ky-nav-toggle:focus-visible {
  outline: 2px solid var(--ky-primary);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.ky-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ky-text-muted);
  margin-bottom: 24px;
}
.ky-breadcrumb a {
  color: var(--ky-text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.ky-breadcrumb a:hover {
  color: var(--ky-primary);
}
.ky-breadcrumb .ky-breadcrumb-sep {
  color: var(--ky-text-muted);
  opacity: 0.6;
}
.ky-breadcrumb span:last-child {
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 400px;
}

/* ---------- 文章头部 ---------- */
.ky-article-hero {
  position: relative;
  padding: 128px 0 56px;
  background:
    linear-gradient(135deg, rgba(13, 20, 32, 0.94) 0%, rgba(7, 11, 18, 0.88) 100%),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border-bottom: 1px solid var(--ky-border);
}
.ky-article-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.ky-article-hero h1 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin: 0 0 16px;
  max-width: 860px;
  letter-spacing: 0.01em;
}
.ky-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}
.ky-article-cat {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(139, 92, 246, 0.15);
  color: var(--ky-purple);
}
.ky-article-time {
  font-family: var(--ky-mono);
  font-size: 14px;
  color: var(--ky-text-secondary);
}

/* ---------- 文章正文区 ---------- */
.ky-article-section {
  padding: 56px 0 64px;
}
.ky-article-content {
  max-width: 780px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.9;
  color: #B8C2D0;
}
.ky-article-content p {
  margin-bottom: 28px;
}
.ky-article-content h2 {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--ky-primary);
  line-height: 1.4;
}
.ky-article-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin: 32px 0 12px;
  line-height: 1.5;
}
.ky-article-content a {
  color: var(--ky-primary);
  text-decoration: underline dashed;
  text-underline-offset: 4px;
  transition: text-decoration 0.2s;
}
.ky-article-content a:hover {
  text-decoration: underline solid;
  color: #5befd5;
}
.ky-article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--ky-radius-md);
  margin: 24px 0;
}
.ky-article-content blockquote {
  margin: 24px 0;
  padding: 20px 24px;
  background: var(--ky-bg-secondary);
  border-left: 3px solid var(--ky-primary);
  border-radius: 0 12px 12px 0;
  color: var(--ky-text-secondary);
}
.ky-article-content ul,
.ky-article-content ol {
  margin-bottom: 28px;
}
.ky-article-content ul {
  list-style: none;
  padding-left: 0;
}
.ky-article-content ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
}
.ky-article-content ul li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 13px;
  width: 6px;
  height: 6px;
  background: var(--ky-primary);
  box-shadow: 0 0 6px rgba(25, 227, 194, 0.4);
}
.ky-article-content ol {
  padding-left: 24px;
}
.ky-article-content ol li {
  padding-left: 6px;
  margin-bottom: 8px;
}
.ky-article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}
.ky-article-content table th {
  background: var(--ky-bg-panel);
  color: #fff;
  font-weight: 600;
  padding: 12px 16px;
  border: 1px solid var(--ky-border);
  text-align: left;
}
.ky-article-content table td {
  padding: 12px 16px;
  border: 1px solid var(--ky-border);
}
.ky-article-content table tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}
.ky-article-content .wp-caption,
.ky-article-content figure {
  margin: 24px 0;
}
.ky-article-content .wp-caption-text,
.ky-article-content figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--ky-text-muted);
  padding-top: 8px;
}
.ky-article-content hr {
  border: none;
  height: 1px;
  background: var(--ky-border);
  margin: 40px 0;
}
.ky-article-content code {
  background: var(--ky-bg-panel);
  border: 1px solid var(--ky-border);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--ky-mono);
  font-size: 14px;
  color: var(--ky-primary);
}

/* ---------- 空态 ---------- */
.ky-article-empty {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
  padding: 80px 24px;
}
.ky-article-empty .ky-article-empty-icon {
  font-size: 48px;
  color: var(--ky-text-muted);
  margin-bottom: 16px;
}
.ky-article-empty p {
  font-size: 18px;
  color: var(--ky-text-secondary);
  margin-bottom: 24px;
}

/* ---------- 标签与上下篇 ---------- */
.ky-article-footer-area {
  padding: 0 0 56px;
  border-bottom: 1px solid var(--ky-border);
}
.ky-article-bottom-inner {
  max-width: 780px;
  margin: 0 auto;
}
.ky-article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
  align-items: center;
}
.ky-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--ky-text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: border-color 0.2s, color 0.2s;
}
.ky-tag:hover {
  border-color: var(--ky-primary);
  color: var(--ky-primary);
}
.ky-article-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.ky-pagination-prev,
.ky-pagination-next {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  padding: 20px 24px;
  border-radius: var(--ky-radius-md);
  background: var(--ky-bg-secondary);
  border: 1px solid transparent;
  transition: border-color var(--ky-transition), box-shadow var(--ky-transition), transform var(--ky-transition);
}
.ky-pagination-prev:hover,
.ky-pagination-next:hover {
  border-color: rgba(25, 227, 194, 0.3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  transform: translateY(-2px);
}
.ky-pagination-label {
  font-size: 13px;
  color: var(--ky-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.ky-pagination-next .ky-pagination-label {
  justify-content: flex-end;
}
.ky-pagination-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  transition: color 0.2s;
  line-height: 1.5;
}
.ky-pagination-prev:hover .ky-pagination-title,
.ky-pagination-next:hover .ky-pagination-title {
  color: var(--ky-primary);
}

/* ---------- 相关阅读 ---------- */
.ky-related-section {
  padding: 72px 0 64px;
  background: var(--ky-bg);
}
.ky-related-section .section-title {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  position: relative;
  padding-left: 16px;
  line-height: 1.3;
}
.ky-related-section .section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  border-radius: 2px;
  background: var(--ky-primary);
  box-shadow: 0 0 12px rgba(25, 227, 194, 0.5);
}
.ky-related-subtitle {
  font-size: 15px;
  color: var(--ky-text-secondary);
  margin-bottom: 40px;
  padding-left: 16px;
}
.ky-related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.ky-related-card {
  background: var(--ky-bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--ky-radius-lg);
  overflow: hidden;
  text-decoration: none;
  transition: transform var(--ky-transition), box-shadow var(--ky-transition), border-color var(--ky-transition);
  display: flex;
  flex-direction: column;
}
.ky-related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ky-shadow-hover);
  border-color: rgba(25, 227, 194, 0.3);
}
.ky-related-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--ky-bg-panel);
}
.ky-related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.ky-related-card:hover .ky-related-thumb img {
  transform: scale(1.04);
}
.ky-related-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.ky-related-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  line-height: 1.5;
  transition: color 0.2s;
  margin: 0;
}
.ky-related-card:hover .ky-related-title {
  color: var(--ky-primary);
}
.ky-related-excerpt {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ky-text-secondary);
  margin: 0;
  flex: 1;
}
.ky-related-date {
  font-family: var(--ky-mono);
  font-size: 12px;
  color: var(--ky-text-muted);
}
.ky-back-list {
  text-align: center;
  margin-top: 48px;
}

/* ---------- CTA 通栏 ---------- */
.ky-article-cta {
  padding: 40px 0 56px;
}
.ky-article-cta-inner {
  max-width: 900px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(13, 20, 32, 0.95), rgba(19, 28, 46, 0.85));
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--ky-radius-lg);
  padding: 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.ky-article-cta-inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ky-primary), var(--ky-purple));
}
.ky-article-cta-inner h3 {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.ky-article-cta-inner p {
  font-size: 15px;
  color: var(--ky-text-secondary);
  margin-bottom: 24px;
}

/* ---------- 页脚 ---------- */
.ky-footer {
  background: #0A0E16;
  border-top: 1px solid var(--ky-border);
  padding-top: 64px;
}
.ky-footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 40px;
}
.ky-footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.ky-footer-desc {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ky-text-muted);
  max-width: 280px;
}
.ky-footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.ky-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ky-footer-links a {
  font-size: 14px;
  color: var(--ky-text-secondary);
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s;
}
.ky-footer-links a:hover {
  color: var(--ky-primary);
  padding-left: 4px;
}
.ky-footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--ky-text-secondary);
}
.ky-footer-contact div {
  display: flex;
  align-items: center;
  gap: 8px;
}
.ky-footer-contact i {
  color: var(--ky-primary);
  font-size: 16px;
  width: 18px;
}
.ky-footer-copyright {
  border-top: 1px solid var(--ky-border);
  padding: 20px 0;
  text-align: center;
  color: var(--ky-text-muted);
  font-size: 13px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .ky-footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .ky-related-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .ky-header-inner {
    padding: 0 20px;
  }
  .container {
    padding: 0 20px;
  }
}
@media (max-width: 768px) {
  .ky-nav-toggle {
    display: block;
  }
  .ky-nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--ky-bg-secondary);
    flex-direction: column;
    align-items: stretch;
    padding: 32px 24px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
    margin: 0;
    overflow-y: auto;
  }
  .ky-nav-menu.open {
    transform: translateX(0);
  }
  .ky-nav-link {
    font-size: 18px;
    font-weight: 600;
    padding: 14px 16px;
    width: 100%;
    border-radius: 10px;
  }
  .ky-nav-link.active {
    background: rgba(25, 227, 194, 0.06);
    border-left: 3px solid var(--ky-primary);
    padding-left: 14px;
  }
  .ky-nav-link.active::after {
    display: none;
  }
  .ky-nav-cta {
    display: none;
  }
  .ky-article-hero {
    padding: 104px 0 40px;
  }
  .ky-article-hero h1 {
    font-size: 26px;
  }
  .ky-article-section {
    padding: 40px 0;
  }
  .ky-article-pagination {
    grid-template-columns: 1fr;
  }
  .ky-related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .ky-footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .ky-article-cta-inner {
    padding: 28px 20px;
  }
  .ky-article-cta-inner h3 {
    font-size: 20px;
  }
  .ky-breadcrumb span:last-child {
    max-width: 220px;
  }
}
@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }
  .ky-header-inner {
    padding: 0 16px;
  }
  .ky-article-hero h1 {
    font-size: 22px;
  }
  .ky-article-content {
    font-size: 15px;
  }
  .ky-article-content h2 {
    font-size: 19px;
  }
  .ky-article-content h3 {
    font-size: 17px;
  }
  .ky-related-section {
    padding: 48px 0;
  }
  .ky-related-section .section-title {
    font-size: 24px;
  }
  .ky-footer {
    padding-top: 48px;
  }
  .ky-footer-inner {
    padding-bottom: 0;
  }
  .ky-footer-copyright {
    font-size: 12px;
  }
  .ky-breadcrumb {
    font-size: 13px;
    gap: 6px;
  }
  .ky-breadcrumb span:last-child {
    max-width: 150px;
  }
}

/* ---------- 页面细节 ---------- */
main {
  min-height: 70vh;
}
.ky-article-content:has(.ky-article-empty) {
  padding: 0;
}
a:focus-visible {
  outline: 2px solid var(--ky-primary);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

/* roulang page: category3 */
:root {
            --ky-primary: #19E3C2;
            --ky-secondary: #8B5CF6;
            --ky-accent: #F43F9E;
            --ky-bg: #070B12;
            --ky-bg-secondary: #0D1420;
            --ky-bg-panel: #131C2E;
            --ky-text: #E6EDF6;
            --ky-text-secondary: #93A0B4;
            --ky-text-muted: #5C6B83;
            --ky-border: rgba(255, 255, 255, 0.07);
            --ky-radius-lg: 16px;
            --ky-radius-md: 12px;
            --ky-radius-sm: 8px;
            --ky-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
            --ky-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(25, 227, 194, 0.1);
            --ky-font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --ky-font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
            --ky-space-sec: 96px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--ky-font-sans);
            background-color: var(--ky-bg);
            color: var(--ky-text);
            line-height: 1.8;
            font-size: 16px;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--ky-radius-md);
        }
        a {
            color: var(--ky-primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #4ef0d4;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--ky-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--ky-primary);
            border-radius: 8px;
        }

        /* ========== Header ========== */
        .ky-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(7, 11, 18, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ky-border);
        }
        .ky-header::after {
            content: "";
            display: block;
            height: 2px;
            background: linear-gradient(90deg, var(--ky-primary) 0%, var(--ky-secondary) 100%);
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
        }
        .ky-header-inner {
            max-width: 1440px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .ky-logo {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
            text-decoration: none;
            flex-shrink: 0;
        }
        .ky-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
        }
        .ky-logo-text span {
            color: var(--ky-primary);
        }
        .ky-logo-sub {
            font-size: 11px;
            color: var(--ky-text-muted);
            letter-spacing: 0.2em;
            text-transform: uppercase;
        }
        .ky-nav-menu {
            display: flex;
            list-style: none;
            gap: 34px;
            margin: 0;
            padding: 0;
        }
        .ky-nav-menu .ky-nav-link {
            font-size: 15px;
            color: var(--ky-text-secondary);
            text-decoration: none;
            padding: 8px 0;
            position: relative;
            transition: color 0.25s ease;
            font-weight: 400;
            background: none;
            border: none;
        }
        .ky-nav-menu .ky-nav-link:hover {
            color: #fff;
        }
        .ky-nav-menu .ky-nav-link.active {
            color: #fff;
            font-weight: 500;
            text-shadow: 0 0 12px rgba(25, 227, 194, 0.35);
        }
        .ky-nav-menu .ky-nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--ky-primary);
            box-shadow: 0 0 12px rgba(25, 227, 194, 0.6);
            border-radius: 2px;
        }
        .ky-nav-new {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ky-accent);
            margin-left: 4px;
            vertical-align: super;
            box-shadow: 0 0 6px rgba(244, 63, 158, 0.7);
        }
        .ky-nav-cta {
            margin-left: auto;
            flex-shrink: 0;
        }
        .ky-btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--ky-primary);
            color: #041018;
            font-size: 15px;
            font-weight: 600;
            height: 44px;
            padding: 0 28px;
            border: none;
            border-radius: var(--ky-radius-sm);
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 0 20px rgba(25, 227, 194, 0.25);
            font-family: var(--ky-font-sans);
            line-height: 1;
        }
        .ky-btn-primary:hover {
            background: #4ef0d4;
            color: #041018;
            box-shadow: 0 0 30px rgba(25, 227, 194, 0.5);
            transform: translateY(-1px);
        }
        .ky-btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .ky-btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--ky-text-secondary);
            font-size: 15px;
            font-weight: 500;
            height: 44px;
            padding: 0 28px;
            border: 1px solid #2A3A52;
            border-radius: var(--ky-radius-sm);
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s ease;
            font-family: var(--ky-font-sans);
        }
        .ky-btn-outline:hover {
            border-color: var(--ky-primary);
            color: var(--ky-primary);
            background: rgba(25, 227, 194, 0.05);
        }
        .ky-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .ky-nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* Mobile nav drawer */
        .ky-mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 100%;
            height: 100vh;
            background: var(--ky-bg-secondary);
            z-index: 2000;
            transition: right 0.35s ease;
            display: flex;
            flex-direction: column;
            padding: 24px;
        }
        .ky-mobile-drawer.open {
            right: 0;
        }
        .ky-drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--ky-border);
        }
        .ky-drawer-close {
            background: none;
            border: none;
            color: rgba(255, 255, 255, 0.6);
            font-size: 22px;
            cursor: pointer;
            padding: 6px;
            transition: color 0.2s;
        }
        .ky-drawer-close:hover {
            color: #fff;
        }
        .ky-drawer-menu {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .ky-drawer-menu a {
            display: block;
            color: var(--ky-text-secondary);
            font-size: 18px;
            font-weight: 500;
            padding: 14px 16px;
            border-radius: 10px;
            text-decoration: none;
            transition: all 0.2s ease;
        }
        .ky-drawer-menu a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }
        .ky-drawer-menu a.active {
            color: var(--ky-primary);
            background: rgba(25, 227, 194, 0.08);
            border-left: 3px solid var(--ky-primary);
        }
        .ky-drawer-cta {
            margin-top: auto;
            padding-top: 24px;
        }

        /* ========== Page Hero ========== */
        .ky-cat-hero {
            padding: 160px 0 72px;
            background: linear-gradient(135deg, #0d1420 0%, #070b12 60%, rgba(139, 92, 246, 0.15) 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--ky-border);
        }
        .ky-cat-hero::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ky-cat-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 44px 44px;
            pointer-events: none;
        }
        .ky-cat-hero .container {
            position: relative;
            z-index: 2;
        }
        .ky-breadcrumb {
            font-size: 14px;
            color: var(--ky-text-muted);
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .ky-breadcrumb a {
            color: var(--ky-text-muted);
            text-decoration: none;
            transition: color 0.2s;
        }
        .ky-breadcrumb a:hover {
            color: var(--ky-primary);
        }
        .ky-breadcrumb .sep {
            color: var(--ky-text-muted);
            margin: 0 2px;
        }
        .ky-breadcrumb .current {
            color: #fff;
        }
        .ky-cat-hero h1 {
            font-size: 40px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 20px;
            position: relative;
            padding-left: 18px;
        }
        .ky-cat-hero h1::before {
            content: "";
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 4px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--ky-primary), var(--ky-secondary));
        }
        .ky-cat-hero .lead {
            font-size: 16px;
            color: var(--ky-text-secondary);
            max-width: 680px;
            line-height: 1.9;
            margin-bottom: 32px;
        }
        .ky-cat-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== Features Section ========== */
        .ky-section {
            padding: var(--ky-space-sec) 0;
        }
        .ky-section-tight {
            padding: 56px 0;
        }
        .ky-section-head {
            margin-bottom: 48px;
        }
        .ky-section-head h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.3;
            position: relative;
            display: inline-block;
            padding-left: 18px;
        }
        .ky-section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 4px;
            border-radius: 4px;
            background: var(--ky-primary);
        }
        .ky-section-head p {
            font-size: 15px;
            color: var(--ky-text-secondary);
            max-width: 640px;
        }
        .ky-features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .ky-feature-card {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-lg);
            padding: 36px 28px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .ky-feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--ky-primary), transparent);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .ky-feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ky-shadow-hover);
            border-color: rgba(25, 227, 194, 0.2);
        }
        .ky-feature-card:hover::before {
            opacity: 1;
        }
        .ky-feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(25, 227, 194, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 20px;
            color: var(--ky-primary);
        }
        .ky-feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .ky-feature-card p {
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ========== Alternate Section ========== */
        .ky-alternate {
            background: var(--ky-bg-secondary);
            border-top: 1px solid var(--ky-border);
            border-bottom: 1px solid var(--ky-border);
            padding: var(--ky-space-sec) 0;
        }
        .ky-alternate-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 72px;
        }
        .ky-alternate-row:last-child {
            margin-bottom: 0;
        }
        .ky-alternate-img {
            border-radius: var(--ky-radius-lg);
            overflow: hidden;
            position: relative;
            box-shadow: var(--ky-shadow);
        }
        .ky-alternate-img img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            display: block;
            border-radius: var(--ky-radius-lg);
        }
        .ky-alternate-img::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: var(--ky-radius-lg);
            border: 1px solid rgba(25, 227, 194, 0.15);
            pointer-events: none;
        }
        .ky-alternate-content h3 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .ky-alternate-content p {
            font-size: 15px;
            color: var(--ky-text-secondary);
            line-height: 1.9;
            margin-bottom: 20px;
        }
        .ky-alternate-content ul {
            list-style: none;
            padding: 0;
            margin-bottom: 24px;
        }
        .ky-alternate-content ul li {
            font-size: 14px;
            color: var(--ky-text-secondary);
            padding: 6px 0;
            padding-left: 24px;
            position: relative;
            line-height: 1.7;
        }
        .ky-alternate-content ul li::before {
            content: "";
            position: absolute;
            left: 4px;
            top: 12px;
            width: 8px;
            height: 8px;
            background: var(--ky-primary);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(25, 227, 194, 0.4);
        }
        .ky-tag-badge {
            display: inline-block;
            background: rgba(139, 92, 246, 0.15);
            color: var(--ky-secondary);
            font-size: 12px;
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 14px;
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        /* ========== Trust Strip ========== */
        .ky-trust {
            background: var(--ky-bg);
            padding: 60px 0;
            border-bottom: 1px solid var(--ky-border);
        }
        .ky-trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .ky-trust-item {
            text-align: center;
            padding: 28px 20px;
            background: var(--ky-bg-secondary);
            border-radius: var(--ky-radius-md);
            border: 1px solid var(--ky-border);
            transition: all 0.3s ease;
        }
        .ky-trust-item:hover {
            border-color: rgba(25, 227, 194, 0.3);
            box-shadow: var(--ky-shadow-hover);
        }
        .ky-trust-num {
            font-family: var(--ky-font-mono);
            font-size: 40px;
            font-weight: 700;
            color: var(--ky-primary);
            line-height: 1.2;
            display: block;
            margin-bottom: 8px;
        }
        .ky-trust-label {
            font-size: 14px;
            color: var(--ky-text-secondary);
        }

        /* ========== CTA Banner ========== */
        .ky-cta-banner {
            padding: var(--ky-space-sec) 0;
        }
        .ky-cta-card {
            background: linear-gradient(135deg, var(--ky-bg-panel) 0%, var(--ky-bg-secondary) 100%);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-lg);
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .ky-cta-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--ky-primary), var(--ky-secondary), var(--ky-accent));
        }
        .ky-cta-card::after {
            content: "";
            position: absolute;
            bottom: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .ky-cta-card h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .ky-cta-card p {
            font-size: 16px;
            color: var(--ky-text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .ky-cta-card .ky-btn-primary {
            min-width: 180px;
        }
        .ky-cta-note {
            margin-top: 16px;
            font-size: 13px;
            color: var(--ky-text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .ky-cta-note i {
            color: #34D399;
            font-size: 14px;
        }

        /* ========== Related Cards ========== */
        .ky-related {
            background: var(--ky-bg);
            padding: var(--ky-space-sec) 0;
            border-top: 1px solid var(--ky-border);
        }
        .ky-related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .ky-related-card {
            background: var(--ky-bg-secondary);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }
        .ky-related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ky-shadow-hover);
            border-color: rgba(25, 227, 194, 0.2);
        }
        .ky-related-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .ky-related-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .ky-related-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.5;
            transition: color 0.2s ease;
        }
        .ky-related-card h3 a {
            color: #fff;
            text-decoration: none;
        }
        .ky-related-card h3 a:hover {
            color: var(--ky-primary);
        }
        .ky-related-card p {
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            flex: 1;
        }
        .ky-related-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--ky-text-muted);
            border-top: 1px solid var(--ky-border);
            padding-top: 14px;
        }
        .ky-related-link {
            font-size: 13px;
            color: var(--ky-primary);
            text-decoration: none;
            font-weight: 500;
        }
        .ky-related-link:hover {
            text-decoration: underline;
        }

        /* ========== FAQ ========== */
        .ky-faq {
            padding: var(--ky-space-sec) 0;
            background: var(--ky-bg-secondary);
            border-top: 1px solid var(--ky-border);
        }
        .ky-faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .ky-faq-item {
            padding: 28px 32px;
            border-bottom: 1px solid var(--ky-border);
            background: var(--ky-bg);
            border-radius: 0;
            transition: background 0.25s ease;
        }
        .ky-faq-item:first-child {
            border-top-left-radius: var(--ky-radius-md);
            border-top-right-radius: var(--ky-radius-md);
        }
        .ky-faq-item:last-child {
            border-bottom-left-radius: var(--ky-radius-md);
            border-bottom-right-radius: var(--ky-radius-md);
        }
        .ky-faq-item:hover {
            background: var(--ky-bg-panel);
        }
        .ky-faq-q {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.6;
        }
        .ky-faq-q .q-mark {
            color: var(--ky-primary);
            font-family: var(--ky-font-mono);
            font-weight: 700;
            margin-right: 8px;
        }
        .ky-faq-a {
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 1.9;
            padding-left: 32px;
        }
        .ky-faq-a .a-mark {
            color: var(--ky-text-muted);
            font-family: var(--ky-font-mono);
            font-weight: 600;
            margin-right: 8px;
        }

        /* ========== Footer ========== */
        .ky-footer {
            background: #0A0E16;
            border-top: 1px solid var(--ky-border);
            padding: 64px 0 32px;
        }
        .ky-footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .ky-footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .ky-footer-desc {
            font-size: 13px;
            color: var(--ky-text-muted);
            line-height: 1.8;
            max-width: 280px;
            margin-bottom: 0;
        }
        .ky-footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .ky-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ky-footer-links li {
            margin-bottom: 10px;
        }
        .ky-footer-links a {
            font-size: 14px;
            color: var(--ky-text-secondary);
            text-decoration: none;
            transition: color 0.2s, padding-left 0.2s;
        }
        .ky-footer-links a:hover {
            color: var(--ky-primary);
            padding-left: 4px;
        }
        .ky-footer-contact div {
            font-size: 14px;
            color: var(--ky-text-secondary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ky-footer-contact i {
            color: var(--ky-primary);
            width: 16px;
            text-align: center;
        }
        .ky-footer-copyright {
            border-top: 1px solid var(--ky-border);
            padding-top: 28px;
            text-align: center;
            font-size: 13px;
            color: var(--ky-text-muted);
        }

        /* ========== Focus visible ========== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--ky-primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1199px) {
            .container {
                max-width: 96%;
            }
            .ky-features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .ky-related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 991px) {
            :root {
                --ky-space-sec: 72px;
            }
            .ky-nav-menu {
                display: none;
            }
            .ky-nav-cta {
                display: none;
            }
            .ky-nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .ky-alternate-row {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .ky-alternate-row:nth-child(2) .ky-alternate-img {
                order: -1;
            }
            .ky-trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .ky-cat-hero h1 {
                font-size: 36px;
            }
        }
        @media (max-width: 767px) {
            :root {
                --ky-space-sec: 56px;
            }
            .ky-header-inner {
                padding: 0 16px;
            }
            .ky-logo-text {
                font-size: 18px;
            }
            .ky-cat-hero {
                padding: 120px 0 48px;
            }
            .ky-cat-hero h1 {
                font-size: 30px;
                padding-left: 14px;
            }
            .ky-cat-hero .lead {
                font-size: 15px;
            }
            .ky-section-head h2 {
                font-size: 26px;
            }
            .ky-features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .ky-alternate {
                padding: 56px 0;
            }
            .ky-alternate-img img {
                height: 240px;
            }
            .ky-alternate-content h3 {
                font-size: 22px;
            }
            .ky-trust-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .ky-trust-item {
                padding: 18px 12px;
            }
            .ky-trust-num {
                font-size: 30px;
            }
            .ky-related-grid {
                grid-template-columns: 1fr;
            }
            .ky-cta-card {
                padding: 40px 24px;
            }
            .ky-cta-card h2 {
                font-size: 24px;
            }
            .ky-faq-item {
                padding: 22px 18px;
            }
            .ky-faq-a {
                padding-left: 24px;
            }
            .ky-footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .ky-cat-hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .ky-cat-hero-actions .ky-btn-primary,
            .ky-cat-hero-actions .ky-btn-outline {
                width: 100%;
            }
        }
        @media (max-width: 520px) {
            .ky-header-inner {
                padding: 0 14px;
            }
            .ky-logo-sub {
                display: none;
            }
            .ky-footer-inner {
                grid-template-columns: 1fr;
            }
            .ky-trust-grid {
                grid-template-columns: 1fr 1fr;
            }
            .ky-trust-num {
                font-size: 26px;
            }
            .ky-trust-label {
                font-size: 13px;
            }
            .ky-breadcrumb {
                font-size: 13px;
                flex-wrap: wrap;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
                scroll-behavior: auto;
            }
        }

/* roulang page: category2 */
:root {
            --ky-primary: #19E3C2;
            --ky-primary-dark: #0EA88F;
            --ky-secondary: #8B5CF6;
            --ky-magenta: #F43F9E;
            --ky-bg: #070B12;
            --ky-bg-deep: #0A0E16;
            --ky-bg-card: #0D1420;
            --ky-bg-panel: #131C2E;
            --ky-text: #E6EDF6;
            --ky-text-secondary: #93A0B4;
            --ky-text-muted: #5C6B83;
            --ky-success: #34D399;
            --ky-border: rgba(255, 255, 255, 0.07);
            --ky-border-light: rgba(255, 255, 255, 0.12);
            --ky-radius-lg: 16px;
            --ky-radius-md: 12px;
            --ky-radius-sm: 8px;
            --ky-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
            --ky-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(25, 227, 194, 0.1);
            --ky-center-glow: 0 0 20px rgba(25, 227, 194, 0.35);
            --ky-transition: 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--ky-text);
            background-color: var(--ky-bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--ky-primary);
            text-decoration: none;
            transition: color var(--ky-transition);
        }
        a:hover {
            color: var(--ky-primary);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ::selection {
            background: rgba(25, 227, 194, 0.25);
            color: #fff;
        }
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--ky-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--ky-primary);
            border-radius: 6px;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            margin: 0 auto;
        }

        /* Header */
        .ky-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(7, 11, 18, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--ky-border);
        }
        .ky-header::after {
            content: "";
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--ky-primary), var(--ky-secondary));
            opacity: 0.8;
        }
        .ky-header-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
        }
        .ky-logo {
            display: inline-flex;
            flex-direction: column;
            line-height: 1.2;
            flex-shrink: 0;
        }
        .ky-logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .ky-logo-text span {
            color: var(--ky-primary);
        }
        .ky-logo-sub {
            font-size: 11px;
            font-weight: 400;
            color: var(--ky-text-muted);
            letter-spacing: 0.2em;
            text-transform: uppercase;
        }
        .ky-nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .ky-nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 400;
            color: var(--ky-text-secondary);
            padding: 8px 2px;
            transition: color var(--ky-transition);
        }
        .ky-nav-link:hover {
            color: #fff;
        }
        .ky-nav-link.active {
            color: #fff;
            font-weight: 500;
        }
        .ky-nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--ky-primary);
            box-shadow: 0 0 8px rgba(25, 227, 194, 0.7);
        }
        .ky-nav-new {
            display: inline-block;
            width: 10px;
            height: 10px;
            background: var(--ky-magenta);
            border-radius: 50%;
            margin-left: 4px;
            vertical-align: 4px;
            box-shadow: 0 0 6px rgba(244, 63, 158, 0.6);
        }
        .ky-nav-cta {
            flex-shrink: 0;
        }
        .ky-btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: 8px;
            background: var(--ky-primary);
            color: #041018;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(25, 227, 194, 0.25);
            transition: all var(--ky-transition);
        }
        .ky-btn-primary:hover {
            background: #2df0d0;
            color: #041018;
            box-shadow: 0 0 30px rgba(25, 227, 194, 0.5);
        }
        .ky-btn-primary:active {
            transform: translateY(1px);
        }
        .ky-nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border: 1px solid var(--ky-border);
            border-radius: 8px;
            background: transparent;
            color: var(--ky-text);
            font-size: 16px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }
        .ky-nav-toggle:hover {
            border-color: var(--ky-primary);
            color: var(--ky-primary);
        }

        /* Category Hero */
        .ky-cat-hero {
            background: linear-gradient(135deg, rgba(7, 11, 18, 0.93) 0%, rgba(19, 28, 46, 0.82) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 160px 0 72px;
            margin-top: 72px;
            border-bottom: 1px solid var(--ky-border);
        }
        .ky-cat-hero .ky-cat-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(139, 92, 246, 0.15);
            border: 1px solid rgba(139, 92, 246, 0.3);
            border-radius: 999px;
            padding: 4px 16px;
            font-size: 13px;
            color: var(--ky-secondary);
            margin-bottom: 20px;
        }
        .ky-cat-hero h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin: 0 0 16px;
        }
        .ky-cat-hero-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--ky-text-secondary);
            max-width: 720px;
        }
        .ky-cat-hero-meta {
            margin-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            font-size: 13px;
            color: var(--ky-text-muted);
        }
        .ky-cat-hero-meta i {
            color: var(--ky-primary);
            margin-right: 6px;
        }

        /* Section */
        .ky-section {
            padding: 96px 0;
        }
        .ky-section-alt {
            background: var(--ky-bg-card);
            border-top: 1px solid var(--ky-border);
            border-bottom: 1px solid var(--ky-border);
        }
        .ky-section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ky-primary);
            margin-bottom: 12px;
            letter-spacing: 0.04em;
        }
        .ky-section-label::before {
            content: "#";
            font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
        }
        .ky-section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin: 0 0 16px;
        }
        .ky-section-subtitle {
            font-size: 15px;
            color: var(--ky-text-secondary);
            max-width: 640px;
            margin-bottom: 48px;
        }

        /* Features */
        .ky-features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .ky-feature-card {
            background: var(--ky-bg-card);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-md);
            padding: 32px 28px;
            transition: all var(--ky-transition);
            position: relative;
            overflow: hidden;
        }
        .ky-feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--ky-primary), transparent);
            opacity: 0;
            transition: opacity var(--ky-transition);
        }
        .ky-feature-card:hover {
            box-shadow: var(--ky-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(25, 227, 194, 0.25);
        }
        .ky-feature-card:hover::before {
            opacity: 1;
        }
        .ky-feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(25, 227, 194, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ky-primary);
            font-size: 18px;
            margin-bottom: 20px;
        }
        .ky-feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 10px;
        }
        .ky-feature-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--ky-text-secondary);
            margin: 0;
        }

        /* Alternate rows */
        .ky-alt-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 96px;
        }
        .ky-alt-row:last-child {
            margin-bottom: 0;
        }
        .ky-alt-img {
            border-radius: var(--ky-radius-lg);
            overflow: hidden;
            border: 1px solid var(--ky-border);
            position: relative;
        }
        .ky-alt-img img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
        }
        .ky-alt-img:hover img {
            transform: scale(1.02);
        }
        .ky-alt-img::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: var(--ky-radius-lg);
            box-shadow: inset 0 0 40px rgba(7, 11, 18, 0.25);
            pointer-events: none;
        }
        .ky-alt-content h3 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            line-height: 1.4;
            margin: 0 0 20px;
        }
        .ky-alt-content h3::before {
            content: "";
            display: block;
            width: 4px;
            height: 22px;
            background: var(--ky-primary);
            border-radius: 4px;
            margin-bottom: 12px;
        }
        .ky-alt-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ky-alt-list li {
            position: relative;
            padding-left: 28px;
            font-size: 15px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }
        .ky-alt-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 12px;
            width: 12px;
            height: 12px;
            background: var(--ky-primary);
            border-radius: 2px;
            opacity: 0.85;
        }
        .ky-alt-tag {
            display: inline-block;
            background: rgba(139, 92, 246, 0.15);
            color: var(--ky-secondary);
            border-radius: 999px;
            padding: 2px 12px;
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 16px;
        }

        /* CTA */
        .ky-cta-banner {
            background: linear-gradient(135deg, rgba(13, 20, 32, 0.95), rgba(19, 28, 46, 0.9)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            border-radius: var(--ky-radius-lg);
            border: 1px solid var(--ky-border);
            padding: 64px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .ky-cta-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(25, 227, 194, 0.18), transparent 70%);
            pointer-events: none;
        }
        .ky-cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            position: relative;
        }
        .ky-cta-banner p {
            font-size: 15px;
            color: var(--ky-text-secondary);
            max-width: 520px;
            margin: 0 auto 32px;
            position: relative;
        }
        .ky-cta-banner .ky-btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 28px;
            border-radius: 8px;
            background: transparent;
            color: var(--ky-primary);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid rgba(25, 227, 194, 0.5);
            transition: all var(--ky-transition);
            position: relative;
        }
        .ky-cta-banner .ky-btn-secondary:hover {
            background: rgba(25, 227, 194, 0.1);
            border-color: var(--ky-primary);
            box-shadow: var(--ky-center-glow);
        }

        /* FAQ */
        .ky-faq-inner {
            max-width: 800px;
            margin: 0 auto;
        }
        .ky-faq-item {
            border-bottom: 1px solid var(--ky-border);
            padding: 28px 0;
        }
        .ky-faq-item:first-child {
            padding-top: 0;
        }
        .ky-faq-q {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .ky-faq-q::before {
            content: "Q.";
            font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
            color: var(--ky-primary);
            font-weight: 700;
            flex-shrink: 0;
        }
        .ky-faq-a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--ky-text-secondary);
            line-height: 1.8;
        }
        .ky-faq-a::before {
            content: "A.";
            font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
            color: var(--ky-text-muted);
            font-weight: 700;
            flex-shrink: 0;
        }

        /* Related */
        .ky-related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .ky-related-card {
            display: block;
            background: var(--ky-bg-card);
            border: 1px solid var(--ky-border);
            border-radius: var(--ky-radius-md);
            overflow: hidden;
            transition: all var(--ky-transition);
            height: 100%;
        }
        .ky-related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--ky-shadow-hover);
            border-color: rgba(25, 227, 194, 0.25);
        }
        .ky-related-img {
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--ky-bg-panel);
        }
        .ky-related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
        }
        .ky-related-card:hover .ky-related-img img {
            transform: scale(1.04);
        }
        .ky-related-body {
            padding: 24px;
        }
        .ky-related-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            line-height: 1.5;
            margin: 0 0 10px;
            transition: color var(--ky-transition);
        }
        .ky-related-card:hover .ky-related-body h3 {
            color: var(--ky-primary);
        }
        .ky-related-body p {
            font-size: 13px;
            color: var(--ky-text-secondary);
            line-height: 1.7;
            margin: 0 0 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .ky-related-meta {
            font-family: "JetBrains Mono", "SF Mono", Consolas, monospace;
            font-size: 12px;
            color: var(--ky-text-muted);
        }

        /* Footer */
        .ky-footer {
            background: var(--ky-bg-deep);
            border-top: 1px solid var(--ky-border);
            padding: 64px 0 24px;
            margin-top: 96px;
        }
        .ky-footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .ky-footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .ky-footer-desc {
            font-size: 13px;
            color: var(--ky-text-muted);
            line-height: 1.7;
            max-width: 280px;
            margin: 0;
        }
        .ky-footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .ky-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .ky-footer-links li {
            margin-bottom: 10px;
        }
        .ky-footer-links a {
            font-size: 14px;
            color: var(--ky-text-secondary);
            transition: all var(--ky-transition);
        }
        .ky-footer-links a:hover {
            color: var(--ky-primary);
            padding-left: 4px;
        }
        .ky-footer-contact div {
            font-size: 14px;
            color: var(--ky-text-secondary);
            margin-bottom: 10px;
        }
        .ky-footer-contact i {
            color: var(--ky-primary);
            width: 20px;
            margin-right: 6px;
        }
        .ky-footer-copyright {
            border-top: 1px solid var(--ky-border);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: var(--ky-text-muted);
        }

        /* Responsive */
        @media (max-width: 1199px) {
            .container {
                max-width: 96%;
            }
            .ky-nav-menu {
                gap: 20px;
            }
        }
        @media (max-width: 991px) {
            .ky-nav-toggle {
                display: flex;
            }
            .ky-nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 100%;
                height: 100vh;
                background: var(--ky-bg-card);
                flex-direction: column;
                gap: 0;
                padding: 80px 40px 40px;
                transition: right 0.3s ease;
                z-index: 999;
                overflow-y: auto;
            }
            .ky-nav-menu.open {
                right: 0;
            }
            .ky-nav-menu li {
                width: 100%;
            }
            .ky-nav-link {
                display: block;
                font-size: 18px;
                font-weight: 600;
                padding: 16px 0;
                border-bottom: 1px solid var(--ky-border);
            }
            .ky-nav-link.active::after {
                left: -16px;
                right: auto;
                top: 0;
                bottom: 0;
                width: 3px;
                height: auto;
                box-shadow: none;
            }
            .ky-nav-cta {
                display: none;
            }
            .ky-features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .ky-alt-row {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .ky-alt-img img {
                height: 280px;
            }
            .ky-related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .ky-footer-inner {
                grid-template-columns: 1fr 1fr;
            }
            .ky-cat-hero {
                padding: 140px 0 56px;
            }
            .ky-cat-hero h1 {
                font-size: 30px;
            }
        }
        @media (max-width: 767px) {
            .ky-section {
                padding: 56px 0;
            }
            .ky-section-title {
                font-size: 22px;
            }
            .ky-cat-hero {
                padding: 120px 0 48px;
            }
            .ky-cat-hero h1 {
                font-size: 28px;
            }
            .ky-cat-hero-desc {
                font-size: 14px;
            }
            .ky-features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .ky-related-grid {
                grid-template-columns: 1fr;
            }
            .ky-footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .ky-cta-banner {
                padding: 40px 24px;
            }
            .ky-cta-banner h2 {
                font-size: 22px;
            }
            .ky-alt-content h3 {
                font-size: 20px;
            }
            .ky-alt-img img {
                height: 220px;
            }
            .ky-faq-q {
                font-size: 15px;
            }
            .ky-faq-a {
                font-size: 14px;
            }
            .ky-nav-menu {
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        @media (max-width: 400px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .ky-logo-sub {
                letter-spacing: 0.1em;
            }
            .ky-cta-banner .ky-btn-secondary {
                width: 100%;
            }
        }