/* roulang page: index */
:root {
            --primary: #2B6FE3;
            --primary-hover: #16408F;
            --primary-active: #0E2B66;
            --amber: #FF9E00;
            --amber-hover: #E08A00;
            --bg: #0A111F;
            --panel: #101B30;
            --glass: rgba(255, 255, 255, 0.06);
            --glass-border: rgba(255, 255, 255, 0.12);
            --text: #E6EDF6;
            --text-secondary: #9AACC3;
            --text-placeholder: #5B6B82;
            --success: #2AC769;
            --error: #E54D42;
            --warning: #FFB020;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 6px;
            --radius-badge: 999px;
            --font-mono: 'Roboto Mono', 'DIN Alternate', 'SF Mono', Consolas, monospace;
            --sidebar-width: 260px;
            --transition: 200ms ease;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25);
            --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.35);
            --shadow-amber: 0 0 22px rgba(255, 158, 0, 0.35);
        }

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

        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg);
            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;
            color: var(--text);
            line-height: 1.75;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
        }

        .grid-container {
            max-width: 1280px;
            padding-left: 40px;
            padding-right: 40px;
        }

        .grid-x {
            margin-left: -12px;
            margin-right: -12px;
        }

        .cell {
            padding-left: 12px;
            padding-right: 12px;
        }

        .site-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: #0E1729;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
        }

        .brand-area {
            height: 84px;
            display: flex;
            align-items: center;
            padding: 0 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }

        .brand-logo {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 2px solid var(--amber);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--amber);
            margin-right: 12px;
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.3;
        }

        .brand-text strong {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-text span {
            font-size: 12px;
            color: var(--text-secondary);
            letter-spacing: 1px;
        }

        .side-nav {
            flex: 1;
            padding: 20px 0;
        }

        .nav-group-title {
            font-size: 11px;
            font-weight: 600;
            color: var(--text-placeholder);
            text-transform: uppercase;
            letter-spacing: 2px;
            padding: 10px 24px 6px;
        }

        .side-nav a {
            display: block;
            padding: 10px 24px 10px 28px;
            font-size: 14px;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition);
            line-height: 1.4;
        }

        .side-nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.03);
        }

        .side-nav a.active {
            color: var(--text);
            border-left-color: var(--amber);
            background: rgba(255, 158, 0, 0.05);
        }

        .side-contact {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 12px;
            color: var(--text-placeholder);
            line-height: 1.8;
            flex-shrink: 0;
        }

        .side-contact i {
            width: 16px;
            color: var(--amber);
            margin-right: 4px;
        }

        .site-main {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(14, 23, 41, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 999;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-brand {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
        }

        .mobile-brand span {
            color: var(--amber);
            font-family: var(--font-mono);
            font-size: 16px;
        }

        .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-btn);
        }

        .hamburger span {
            width: 20px;
            height: 2px;
            background: var(--text);
            transition: all 0.3s;
            display: block;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 17, 31, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 998;
            padding-top: 84px;
            overflow-y: auto;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .mobile-drawer.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-drawer .drawer-nav {
            padding: 20px 0;
        }

        .mobile-drawer .drawer-nav a {
            display: block;
            padding: 14px 32px;
            font-size: 16px;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
        }

        .mobile-drawer .drawer-nav a:hover,
        .mobile-drawer .drawer-nav a.active {
            color: var(--text);
            border-left-color: var(--amber);
            background: rgba(255, 158, 0, 0.05);
        }

        .mobile-drawer .drawer-title {
            font-size: 12px;
            color: var(--text-placeholder);
            padding: 12px 32px 6px;
            text-transform: uppercase;
            letter-spacing: 2px;
        }

        .mobile-drawer .drawer-contact {
            padding: 24px 32px;
            font-size: 13px;
            color: var(--text-placeholder);
            line-height: 2;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .hero {
            position: relative;
            min-height: 100vh;
            min-height: 720px;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(90deg, rgba(10, 17, 31, 0.96) 0%, rgba(10, 17, 31, 0.72) 45%, rgba(10, 17, 31, 0.35) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 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;
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 80px 48px 80px 56px;
            max-width: 760px;
        }

        .hero-kicker {
            font-size: 14px;
            color: var(--amber);
            letter-spacing: 3px;
            font-weight: 600;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero h1 em {
            font-style: normal;
            color: var(--amber);
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 560px;
        }

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

        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all var(--transition);
            line-height: 1;
        }

        .btn-primary {
            background: linear-gradient(135deg, #FFB020, var(--amber));
            color: #0A111F;
            box-shadow: var(--shadow-amber);
        }

        .btn-primary:hover {
            filter: brightness(1.08);
            box-shadow: 0 0 30px rgba(255, 158, 0, 0.5);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            box-shadow: 0 0 18px rgba(43, 111, 227, 0.2);
            transform: translateY(-2px);
            color: var(--text);
        }

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

        .hero-stats {
            position: relative;
            z-index: 3;
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 24px 56px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            padding: 12px 0;
        }

        .stat-number {
            font-family: var(--font-mono);
            font-size: 38px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.1;
            letter-spacing: -1px;
        }

        .stat-number span {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-secondary);
            margin-left: 4px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        .section {
            padding: 96px 48px;
            position: relative;
        }

        .section-head {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            margin-bottom: 48px;
        }

        .section-num {
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--amber);
            background: rgba(255, 158, 0, 0.1);
            border: 1px solid rgba(255, 158, 0, 0.25);
            border-radius: 6px;
            padding: 4px 10px;
            letter-spacing: 1px;
            flex-shrink: 0;
            margin-top: 4px;
        }

        .section-title-wrap {
            flex: 1;
        }

        .section-title-wrap h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 6px;
        }

        .section-title-wrap p {
            font-size: 15px;
            color: var(--text-secondary);
        }

        .section-line {
            width: 40px;
            height: 2px;
            background: var(--amber);
            flex-shrink: 0;
            margin-top: 20px;
        }

        .services {
            background: rgba(16, 27, 48, 0.5);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .services-grid .row+.row {
            margin-top: 24px;
        }

        .service-card {
            background: var(--glass);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 32px;
            height: 100%;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .service-card:hover {
            border-color: rgba(255, 158, 0, 0.5);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .service-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(43, 111, 227, 0.15);
            border: 1px solid rgba(43, 111, 227, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-card:hover .card-icon {
            background: rgba(255, 158, 0, 0.1);
            border-color: rgba(255, 158, 0, 0.4);
            color: var(--amber);
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .service-card .card-link {
            margin-top: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--amber);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .service-card .card-link:hover {
            color: var(--amber-hover);
        }

        .service-card .card-img {
            margin: -32px -32px 24px;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            max-height: 160px;
            overflow: hidden;
        }

        .service-card .card-img img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .service-card:hover .card-img img {
            transform: scale(1.03);
        }

        .compare {
            background: var(--bg);
        }

        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            position: relative;
        }

        .compare-grid::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            border-left: 2px dashed rgba(255, 255, 255, 0.1);
        }

        .compare-panel {
            padding: 32px;
        }

        .compare-panel:first-child {
            padding-right: 40px;
        }

        .compare-panel:last-child {
            padding-left: 40px;
        }

        .compare-panel h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .compare-panel.traditional h3 {
            color: var(--text-secondary);
        }

        .compare-panel.mk h3 {
            color: var(--text);
        }

        .compare-panel.mk {
            border-top: 3px solid var(--amber);
            background: rgba(255, 158, 0, 0.03);
            border-radius: var(--radius-card);
        }

        .compare-item {
            display: flex;
            align-items: center;
            min-height: 56px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .compare-item-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            margin-right: 14px;
            flex-shrink: 0;
        }

        .compare-item.traditional .compare-item-icon {
            background: rgba(229, 77, 66, 0.1);
            color: var(--error);
        }

        .compare-item.mk .compare-item-icon {
            background: rgba(42, 199, 105, 0.1);
            color: var(--success);
        }

        .compare-item-text {
            font-size: 14px;
            line-height: 1.5;
        }

        .compare-item-text strong {
            font-weight: 600;
            color: var(--text);
        }

        .compare-item-text span {
            color: var(--text-secondary);
        }

        .news {
            background: rgba(16, 27, 48, 0.5);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .news-grid {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 32px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-card {
            display: flex;
            align-items: stretch;
            background: var(--glass);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition);
            border-left: 3px solid transparent;
        }

        .news-card:hover {
            border-left-color: var(--amber);
            border-color: rgba(255, 158, 0, 0.25);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .news-thumb {
            width: 96px;
            min-height: 72px;
            flex-shrink: 0;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 72px;
        }

        .news-body {
            padding: 14px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 6px;
        }

        .news-meta .badge {
            font-size: 12px;
            color: var(--warning);
            background: rgba(255, 158, 0, 0.12);
            border: 1px solid rgba(255, 158, 0, 0.3);
            border-radius: var(--radius-badge);
            padding: 2px 10px;
            line-height: 1.4;
        }

        .news-date {
            font-size: 12px;
            color: var(--text-placeholder);
            font-family: var(--font-mono);
        }

        .news-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .news-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-more {
            margin-top: 6px;
            font-size: 13px;
            color: var(--amber);
            font-weight: 600;
        }

        .news-empty {
            min-height: 320px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: var(--glass);
            border: 1px dashed var(--glass-border);
            border-radius: var(--radius-card);
            color: var(--text-placeholder);
        }

        .news-empty .empty-icon {
            font-size: 36px;
            margin-bottom: 12px;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .sidebar-block {
            background: var(--glass);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 20px;
        }

        .sidebar-block h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .tag-list .tag {
            font-size: 12px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-badge);
            padding: 4px 14px;
            transition: all var(--transition);
            cursor: default;
        }

        .tag-list .tag:hover {
            color: var(--amber);
            border-color: rgba(255, 158, 0, 0.4);
        }

        .notice-block {
            background: rgba(255, 158, 0, 0.06);
            border: 1px solid rgba(255, 158, 0, 0.2);
            border-radius: var(--radius-card);
            padding: 16px;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .notice-block strong {
            color: var(--amber);
            font-size: 14px;
            display: block;
            margin-bottom: 4px;
        }

        .faq {
            background: var(--bg);
        }

        .faq-wrap {
            display: grid;
            grid-template-columns: 320px 1fr;
            gap: 48px;
        }

        .faq-intro h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .faq-intro p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .accordion {
            list-style: none;
        }

        .accordion-item {
            background: var(--glass);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .accordion-item:hover {
            border-color: rgba(255, 158, 0, 0.3);
        }

        .accordion-item.is-active {
            border-color: rgba(255, 158, 0, 0.4);
        }

        .accordion-title {
            display: flex !important;
            align-items: center;
            justify-content: space-between;
            min-height: 48px;
            padding: 14px 20px !important;
            font-size: 15px !important;
            font-weight: 600 !important;
            color: var(--text) !important;
            position: relative;
        }

        .accordion-title::after {
            content: '+';
            font-size: 22px;
            color: var(--amber);
            transition: transform 0.3s ease;
            font-weight: 400;
            flex-shrink: 0;
            margin-left: 16px;
        }

        .accordion-item.is-active .accordion-title::after {
            transform: rotate(45deg);
        }

        .accordion-content {
            padding: 4px 20px 16px !important;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
            border-top: none !important;
            background: transparent !important;
        }

        .contact {
            background: rgba(16, 27, 48, 0.5);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .contact-card {
            position: relative;
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 16px;
            padding: 48px;
            overflow: hidden;
        }

        .contact-card::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(255, 158, 0, 0.18) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }

        .contact-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            position: relative;
            z-index: 1;
        }

        .contact-info h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .contact-info p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .contact-phone {
            display: flex;
            align-items: center;
            gap: 12px;
            font-family: var(--font-mono);
            font-size: 20px;
            color: var(--text);
            margin-top: 16px;
        }

        .contact-phone i {
            color: var(--amber);
        }

        .contact-note {
            font-size: 13px;
            color: var(--text-placeholder);
            margin-top: 8px;
        }

        .contact-form .form-row {
            margin-bottom: 20px;
        }

        .contact-form label {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 6px;
            font-weight: 500;
        }

        .contact-form input,
        .contact-form textarea {
            width: 100%;
            height: 44px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-input);
            color: var(--text);
            font-size: 15px;
            padding: 0 14px;
            transition: all var(--transition);
        }

        .contact-form textarea {
            height: 120px;
            padding: 12px 14px;
            resize: vertical;
        }

        .contact-form input:focus,
        .contact-form textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43, 111, 227, 0.25);
        }

        .contact-form input::placeholder,
        .contact-form textarea::placeholder {
            color: var(--text-placeholder);
        }

        .contact-form .btn-primary {
            width: 100%;
            height: 48px;
        }

        .site-footer {
            background: rgba(10, 17, 31, 0.95);
            border-top: 1px solid rgba(255, 158, 0, 0.15);
            padding: 48px 48px 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            max-width: 1280px;
            margin: 0 auto;
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand .footer-logo .brand-logo {
            width: 36px;
            height: 36px;
            font-size: 12px;
        }

        .footer-brand .footer-logo strong {
            font-size: 16px;
            color: var(--text);
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 2;
            transition: all var(--transition);
        }

        .footer-col a:hover {
            color: var(--amber);
            padding-left: 4px;
        }

        .footer-col .contact-item {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 2;
        }

        .footer-col .contact-item i {
            width: 18px;
            color: var(--amber);
            margin-right: 4px;
        }

        .footer-copyright {
            text-align: center;
            font-size: 12px;
            color: var(--text-placeholder);
            padding: 24px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: 40px;
        }

        .footer-copyright a {
            color: var(--text-secondary);
        }

        .footer-copyright a:hover {
            color: var(--amber);
        }

        @media (min-width: 1025px) {
            .site-sidebar {
                display: flex;
            }
            .mobile-header,
            .mobile-drawer {
                display: none;
            }
        }

        @media (max-width: 1200px) {
            .hero-stats {
                padding: 20px 32px;
            }
            .stat-number {
                font-size: 30px;
            }
            .section {
                padding: 72px 32px;
            }
            .hero-content {
                padding-left: 40px;
            }
        }

        @media (max-width: 1024px) {
            .site-sidebar {
                display: none;
            }
            .site-main {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .mobile-drawer {
                display: block;
            }
            .hero {
                min-height: 620px;
                padding-top: 64px;
            }
            .hero-content {
                padding: 48px 32px;
            }
            .hero h1 {
                font-size: 34px;
            }
            .hero-stats {
                grid-template-columns: repeat(4, 1fr);
                padding: 16px 24px;
            }
            .stat-number {
                font-size: 24px;
            }
            .section {
                padding: 64px 24px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .faq-wrap {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .contact-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .services-grid .columns {
                padding-left: 8px;
                padding-right: 8px;
            }
            .services-grid .row+.row {
                margin-top: 16px;
            }
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 0;
            }
            .hero-content {
                padding: 64px 20px 48px;
                min-height: 520px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr;
                padding: 16px 20px;
                gap: 16px;
            }
            .hero-cta {
                flex-direction: column;
                gap: 12px;
            }
            .hero-cta .btn-primary,
            .hero-cta .btn-secondary {
                width: 100%;
            }
            .section {
                padding: 48px 16px;
            }
            .section-head {
                gap: 12px;
            }
            .section-title-wrap h2 {
                font-size: 24px;
            }
            .section-line {
                display: none;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .compare-grid::before {
                display: none;
            }
            .compare-panel:first-child {
                padding-right: 16px;
            }
            .compare-panel:last-child {
                padding-left: 16px;
                margin-top: 16px;
            }
            .news-card {
                flex-direction: column;
            }
            .news-thumb {
                width: 100%;
                height: 120px;
            }
            .contact-card {
                padding: 24px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .site-footer {
                padding: 40px 20px 20px;
            }
            .services-grid .columns {
                padding-left: 6px;
                padding-right: 6px;
            }
            .service-card {
                padding: 20px;
            }
            .service-card .card-img {
                margin: -20px -20px 16px;
            }
            .service-card .card-img img {
                height: 120px;
            }
        }

        @media (max-width: 480px) {
            .hero-content {
                padding: 48px 16px 40px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 20px;
            }
            .section {
                padding: 40px 12px;
            }
            .section-head {
                margin-bottom: 24px;
            }
            .section-num {
                font-size: 12px;
                padding: 3px 8px;
            }
            .section-title-wrap h2 {
                font-size: 20px;
            }
            .section-title-wrap p {
                font-size: 13px;
            }
            .service-card {
                padding: 16px;
            }
            .service-card .card-img {
                margin: -16px -16px 12px;
            }
            .compare-panel {
                padding: 20px 12px;
            }
            .news-thumb {
                height: 100px;
            }
            .news-body {
                padding: 12px 14px;
            }
            .footer-brand .footer-logo strong {
                font-size: 14px;
            }
            .btn-primary,
            .btn-secondary {
                height: 44px;
                padding: 0 20px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-stats {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
                padding: 12px 16px;
            }
            .stat-label {
                font-size: 12px;
            }
            .news-sidebar {
                display: none;
            }
        }

        @media (min-width: 481px) and (max-width: 768px) {
            .hero-stats {
                grid-template-columns: repeat(4, 1fr);
            }
        }

/* roulang page: article */
:root {
  --primary: #2B6FE3;
  --primary-hover: #16408F;
  --primary-active: #0E2B66;
  --amber: #FF9E00;
  --amber-hover: #E08A00;
  --bg: #0A111F;
  --panel: #101B30;
  --surface: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --text: #E6EDF6;
  --text-secondary: #9AACC3;
  --text-muted: #5B6B82;
  --success: #2AC769;
  --error: #E54D42;
  --warning: #FFB020;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.35);
  --sidebar-width: 260px;
  --content-max: 1280px;
  --mono: "DIN Alternate", "Roboto Mono", "SF Mono", Consolas, monospace;
  --zh: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--zh);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  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: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

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

a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

a:hover {
  color: var(--amber);
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.3;
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
}

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

.grid-container {
  max-width: var(--content-max);
  padding-left: 40px;
  padding-right: 40px;
}

.row {
  max-width: none;
}

.column, .columns {
  padding-left: 12px;
  padding-right: 12px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  background: linear-gradient(135deg, var(--amber) 0%, #FFB020 100%);
  color: #0A111F;
  font-weight: 600;
  font-size: 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 0 22px rgba(255, 158, 0, 0.35);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background: #FFB020;
  color: #0A111F;
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(255, 158, 0, 0.5);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 12px rgba(255, 158, 0, 0.2);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
  font-size: 15px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 0 18px rgba(43, 111, 227, 0.25);
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(43, 111, 227, 0.4);
  outline-offset: 2px;
}

.badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 400;
  color: #FFB020;
  background: rgba(255, 158, 0, 0.12);
  border: 1px solid rgba(255, 158, 0, 0.3);
  margin: 0 8px 8px 0;
}

/* ===== Sidebar 导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: #0E1729;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 1000;
  transition: transform 0.3s ease;
}

.brand-area {
  height: 84px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 800;
  color: var(--amber);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  min-width: 0;
}

.brand-text strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}

.brand-text span {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
  font-size: 18px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

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

.nav-menu {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  padding-bottom: 16px;
}

.nav-group-title {
  font-size: 12px;
  color: var(--text-muted);
  padding: 24px 20px 8px;
  letter-spacing: 1px;
  font-weight: 600;
}

.side-nav a {
  display: block;
  padding: 10px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
}

.side-nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border-left-color: rgba(255, 158, 0, 0.5);
}

.side-nav a.active {
  color: var(--text);
  border-left-color: var(--amber);
  background: rgba(255, 158, 0, 0.06);
}

.nav-contact {
  margin-top: auto;
  padding: 24px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}

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

.contact-item i {
  width: 16px;
  color: var(--text-muted);
  font-size: 13px;
}

/* ===== Main 布局 ===== */
.site-main {
  margin-left: var(--sidebar-width);
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 文章页 ===== */
.article-page {
  padding: 56px 0 32px;
  flex: 1;
}

.article-wrap {
  max-width: 840px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

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

.breadcrumb .current {
  max-width: 400px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--text-muted);
}

.article-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.meta-item i {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== 正文 ===== */
.article-body {
  font-size: 16px;
  line-height: 1.8;
}

.article-body p {
  margin-bottom: 28px;
  color: var(--text);
}

.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin: 48px 0 24px;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 40px 0 16px;
}

.article-body ul,
.article-body ol {
  margin-bottom: 28px;
  padding-left: 1.5em;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.article-body blockquote {
  margin: 32px 0;
  padding: 20px 24px;
  background: rgba(255, 158, 0, 0.06);
  border-left: 4px solid var(--amber);
  border-radius: 0 12px 12px 0;
  color: var(--text-secondary);
  font-style: normal;
}

.article-body img {
  border-radius: 8px;
  margin: 32px auto;
  box-shadow: var(--shadow-card);
}

.article-body table {
  width: 100%;
  margin: 32px 0;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.article-body th {
  background: var(--panel);
  color: var(--text);
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  font-weight: 600;
}

.article-body td {
  padding: 14px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 14px;
  color: var(--text-secondary);
}

.article-body tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.02);
}

.article-body tr:hover td {
  background: rgba(43, 111, 227, 0.1);
}

.article-body pre {
  background: var(--panel);
  padding: 20px;
  border-radius: 12px;
  overflow-x: auto;
  margin-bottom: 28px;
}

.article-body pre,
.article-body code {
  font-family: var(--mono);
  font-size: 14px;
}

.article-body a {
  color: var(--amber);
  text-decoration: underline;
}

.article-body a:hover {
  color: #FFB020;
}

.article-foot {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.article-prevnext {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 16px;
}

.link-with-icon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.link-with-icon:hover {
  color: var(--amber);
}

/* ===== 内容未找到 ===== */
.not-found-box {
  text-align: center;
  padding: 96px 24px;
}

.not-found-box i {
  font-size: 64px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.not-found-box h3 {
  font-size: 28px;
  margin-bottom: 8px;
}

.not-found-box p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.not-found-box .btn-primary,
.not-found-box .btn-secondary {
  margin: 0 6px 12px;
}

/* ===== 相关推荐 ===== */
.related-posts {
  padding: 80px 0;
  background: rgba(16, 27, 48, 0.4);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.related-head {
  margin-bottom: 32px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
}

.section-subtitle {
  color: var(--text-secondary);
  margin-top: 8px;
  font-size: 15px;
}

.related-row {
  margin-left: -12px;
  margin-right: -12px;
}

.related-row .column {
  margin-bottom: 24px;
}

.related-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--amber);
  color: var(--text);
  box-shadow: var(--shadow-hover);
}

.related-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.related-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin: 16px 16px 8px;
}

.related-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.65;
  margin: 0 16px 16px;
  flex: 1;
}

.related-date {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 13px;
  margin: 0 16px 16px;
}

.related-bottom {
  text-align: center;
  margin-top: 32px;
}

/* ===== 底部 CTA ===== */
.cta-section {
  padding: 64px 0 40px;
}

.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -50px;
  left: -50px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(255, 158, 0, 0.2), transparent 70%);
  pointer-events: none;
}

.cta-info h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

.cta-info p {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 0;
  max-width: 520px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #0D1626;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 56px 40px 24px;
  margin-top: auto;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-logo .brand-logo {
  width: 40px;
  height: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  max-width: 420px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--amber);
}

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

.footer-copyright {
  max-width: 1200px;
  margin: 40px auto 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-copyright a {
  color: var(--text-muted);
}

.footer-copyright a:hover {
  color: var(--amber);
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .article-title {
    font-size: 36px;
  }
}

@media (max-width: 1024px) {
  .side-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    flex-direction: row;
    align-items: center;
    overflow: visible;
    background: rgba(10, 17, 31, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .brand-area {
    height: 64px;
    width: 100%;
    padding: 0 20px;
    border-bottom: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    overflow-y: auto;
    background: rgba(14, 23, 41, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: none;
    flex-direction: column;
    padding: 16px 0 32px;
  }

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

  .nav-group-title {
    padding: 20px 24px 8px;
  }

  .side-nav a {
    padding: 12px 24px;
    font-size: 15px;
  }

  .nav-contact {
    margin-top: 16px;
    padding: 20px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-main {
    margin-left: 0;
    padding-top: 64px;
  }

  .article-page {
    padding: 40px 0 32px;
  }
}

@media (max-width: 768px) {
  .grid-container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .article-title {
    font-size: 30px;
  }

  .article-body {
    font-size: 15px;
    line-height: 1.8;
  }

  .article-body h2 {
    font-size: 22px;
    margin-top: 36px;
  }

  .article-body h3 {
    font-size: 19px;
  }

  .related-posts {
    padding: 48px 0;
  }

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

  .cta-section {
    padding: 48px 0 32px;
  }

  .cta-box {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
    gap: 24px;
  }

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

  .site-footer {
    padding: 40px 16px 24px;
  }

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

@media (max-width: 520px) {
  .article-page {
    padding: 28px 0 24px;
  }

  .article-title {
    font-size: 26px;
  }

  .article-meta {
    gap: 12px;
    font-size: 12px;
  }

  .breadcrumb {
    font-size: 12px;
  }

  .breadcrumb .current {
    max-width: 160px;
  }

  .related-row .column {
    padding-left: 8px;
    padding-right: 8px;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding: 0 20px;
  }

  .article-prevnext {
    flex-direction: column;
    gap: 12px;
  }

  .footer-copyright {
    font-size: 12px;
    line-height: 1.6;
  }
}

/* roulang page: category1 */
:root {
  --primary: #2B6FE3;
  --primary-hover: #16408F;
  --primary-active: #0E2B66;
  --amber: #FF9E00;
  --amber-hover: #E08A00;
  --bg: #0A111F;
  --panel: #101B30;
  --glass: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --text-main: #E6EDF6;
  --text-sub: #9AACC3;
  --text-muted: #5B6B82;
  --success: #2AC769;
  --danger: #E54D42;
  --warning: #FFB020;
  --radius: 12px;
  --radius-btn: 8px;
  --radius-input: 6px;
  --shadow: 0 10px 30px rgba(0,0,0,0.25);
  --shadow-hover: 0 14px 40px rgba(0,0,0,0.35);
  --glow: 0 0 22px rgba(255,158,0,0.35);
  --nav-w: 260px;
  --section-space: 96px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  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: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

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

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

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

ul, ol {
  list-style: none;
}

/* ===== Container ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  z-index: 1;
}

/* ===== Side Nav ===== */
.side-nav {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--nav-w);
  background: #0E1729;
  border-right: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  z-index: 1000;
}

.brand-area {
  height: 84px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--amber);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--amber);
  font-weight: 800;
  font-size: 16px;
  font-family: "DIN Alternate", "Roboto Mono", "SF Mono", monospace;
  background: rgba(255,158,0,0.08);
  flex-shrink: 0;
}

.brand-text strong {
  display: block;
  color: var(--text-main);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.brand-text span {
  display: block;
  color: var(--text-sub);
  font-size: 12px;
  margin-top: 2px;
}

.nav-links {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}

.nav-links::-webkit-scrollbar {
  width: 4px;
}

.nav-links::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: 4px;
}

.nav-group-title {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 16px 20px 8px;
  font-weight: 600;
}

.nav-links > a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--text-sub);
  border-left: 3px solid transparent;
  transition: all .2s ease;
}

.nav-links > a:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.04);
}

.nav-links > a.active {
  color: #fff;
  border-left-color: var(--amber);
  background: linear-gradient(90deg, rgba(255,158,0,0.12), transparent);
}

.nav-contact {
  padding: 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px;
  color: var(--text-sub);
  flex-shrink: 0;
}

.nav-contact .contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  line-height: 1.5;
}

.nav-contact .contact-item i {
  color: var(--amber);
  width: 14px;
  font-size: 13px;
  text-align: center;
}

/* ===== Site Main ===== */
.site-main {
  margin-left: var(--nav-w);
  position: relative;
  z-index: 1;
}

/* ===== Mobile Topbar ===== */
.mobile-topbar {
  display: none;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s ease;
  line-height: 1;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #FFB020, #FF9E00);
  color: #0A111F;
  box-shadow: var(--glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #FFC24D, #FF9E00);
  box-shadow: 0 0 30px rgba(255,158,0,0.5);
  transform: translateY(-3px);
  color: #0A111F;
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.2), 0 0 12px rgba(255,158,0,0.2);
}

.btn-primary:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.btn-ghost {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.24);
  color: var(--text-main);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 0 18px rgba(43,111,227,0.25);
  transform: translateY(-3px);
}

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

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

.btn-lg {
  height: 54px;
  padding: 0 36px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* ===== Hero ===== */
.page-hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,17,31,0.96) 0%, rgba(10,17,31,0.78) 48%, rgba(10,17,31,0.45) 100%);
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  padding-top: 80px;
  padding-bottom: 80px;
  width: 100%;
}

.hero-left {
  flex: 1.2;
}

.hero-right {
  flex: 0.8;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--amber);
  background: rgba(255,158,0,0.12);
  border: 1px solid rgba(255,158,0,0.3);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 20px;
}

.page-hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #fff;
}

.hero-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-sub);
  max-width: 560px;
  margin-bottom: 32px;
}

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

.info-panel {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 24px;
  position: relative;
}

.info-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 72px;
  height: 4px;
  background: linear-gradient(90deg, var(--amber), transparent);
  border-radius: 4px 4px 0 0;
}

.info-panel-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 16px;
}

.panel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 10px rgba(255,158,0,0.6);
}

.info-panel-body .info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 14px;
  gap: 12px;
}

.info-panel-body .info-row:last-child {
  border-bottom: none;
}

.info-panel-body .info-row span {
  color: var(--text-sub);
  font-size: 13px;
  flex-shrink: 0;
}

.info-panel-body .info-row strong {
  color: var(--text-main);
  font-weight: 600;
  font-size: 13px;
  text-align: right;
}

/* ===== Section ===== */
.section-block {
  padding: var(--section-space) 0;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.section-block-alt {
  background: rgba(16,27,48,0.4);
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 18px;
}

.section-no {
  font-family: "DIN Alternate", "Roboto Mono", monospace;
  font-size: 20px;
  font-weight: 800;
  color: var(--amber);
  line-height: 1.4;
  flex-shrink: 0;
  margin-top: 4px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin: 0;
}

.section-line {
  display: block;
  width: 40px;
  height: 2px;
  background: var(--amber);
  margin-top: 22px;
  flex-shrink: 0;
}

.section-desc {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 0 32px 52px;
}

/* ===== Matrix Grid ===== */
.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.matrix-card {
  position: relative;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all .2s ease;
  overflow: hidden;
  min-height: 220px;
  display: flex;
  flex-direction: column;
}

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

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

.matrix-card-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,17,31,0.25) 0%, rgba(10,17,31,0.92) 100%);
  z-index: 1;
}

.matrix-card-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.matrix-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(43,111,227,0.18);
  border: 1px solid rgba(43,111,227,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 16px;
}

.card-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 13px;
  font-weight: 600;
  color: #FFB020;
  background: rgba(255,158,0,0.12);
  border: 1px solid rgba(255,158,0,0.3);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 12px;
}

.matrix-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.matrix-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 16px;
}

.card-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--amber);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-link:hover {
  color: var(--amber-hover);
}

.matrix-card-lg {
  grid-column: span 2;
  min-height: 240px;
}

.matrix-card-sm {
  grid-column: span 1;
}

/* ===== Process ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-left: 52px;
}

.process-step {
  position: relative;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all .2s ease;
}

.process-step:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.step-no {
  font-family: "DIN Alternate", "Roboto Mono", monospace;
  font-size: 42px;
  font-weight: 800;
  color: rgba(43,111,227,0.35);
  line-height: 1;
  margin-bottom: 14px;
}

.process-step h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.process-step p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ===== Compare Section ===== */
.compare-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  margin-left: 52px;
}

.filter-panel {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  align-self: flex-start;
}

.filter-panel h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}

.filter-group {
  margin-bottom: 20px;
}

.filter-group label {
  display: block;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 6px;
}

.filter-group select {
  width: 100%;
  height: 44px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-input);
  padding: 0 12px;
  color: var(--text-main);
  font-size: 14px;
  transition: all .2s ease;
}

.filter-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43,111,227,0.25);
}

.filter-panel .btn {
  margin-top: 8px;
}

.table-wrap {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow-x: auto;
}

.mk-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.mk-table thead {
  background: #101B30;
}

.mk-table th {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  text-align: left;
  padding: 15px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.mk-table td {
  padding: 15px 16px;
  font-size: 14px;
  color: var(--text-main);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.mk-table tbody tr:nth-child(even) {
  background: rgba(255,255,255,0.02);
}

.mk-table tbody tr:hover {
  background: rgba(43,111,227,0.12);
}

.mk-table tbody tr:last-child td {
  border-bottom: none;
}

.table-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: #FFB020;
  background: rgba(255,158,0,0.12);
  border: 1px solid rgba(255,158,0,0.3);
  border-radius: 999px;
  padding: 2px 10px;
}

/* ===== Scene Section ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-left: 52px;
}

.scene-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all .2s ease;
}

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

.scene-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(43,111,227,0.15);
  border: 1px solid rgba(43,111,227,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  margin-bottom: 16px;
}

.scene-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.scene-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
}

.scene-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.scene-tags span {
  font-size: 12px;
  color: var(--text-sub);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 999px;
  padding: 3px 10px;
}

/* ===== FAQ ===== */
.faq-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  margin-left: 52px;
}

.faq-side h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.faq-side p {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 20px;
}

.accordion.mk-faq {
  background: transparent;
  margin: 0;
  list-style: none;
}

.accordion.mk-faq .accordion-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  margin-bottom: 16px;
  transition: border-color .2s ease;
}

.accordion.mk-faq .accordion-item:hover {
  border-color: rgba(255,158,0,0.35);
}

.accordion.mk-faq .accordion-item.is-active {
  border-color: rgba(255,158,0,0.45);
}

.accordion.mk-faq .accordion-title {
  background: transparent;
  border: none;
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 14px 48px 14px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  position: relative;
  line-height: 1.4;
}

.accordion.mk-faq .accordion-title:hover {
  background: rgba(255,255,255,0.03);
  color: #fff;
}

.accordion.mk-faq .accordion-title::before,
.accordion.mk-faq .accordion-title::after {
  content: "" !important;
  width: 14px;
  height: 2px;
  background: var(--amber);
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  transition: all .3s ease;
}

.accordion.mk-faq .accordion-title::after {
  transform: translateY(-50%) rotate(90deg);
}

.accordion.mk-faq .accordion-item.is-active > .accordion-title::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.accordion.mk-faq .accordion-content {
  background: transparent;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 16px 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-sub);
}

/* ===== CTA ===== */
.cta-section {
  padding: 60px 0 96px;
}

.cta-card {
  position: relative;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 48px;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  overflow: hidden;
}

.cta-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 120px;
  height: 100%;
  background: radial-gradient(circle at left top, rgba(255,158,0,0.18), transparent 70%);
  pointer-events: none;
}

.cta-left {
  position: relative;
  z-index: 1;
}

.cta-left h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.cta-left p {
  font-size: 15px;
  color: var(--text-sub);
}

.cta-right {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.cta-phone {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.cta-phone i {
  color: var(--amber);
}

/* ===== Footer ===== */
.site-footer {
  background: #0C1524;
  border-top: 1px solid rgba(255,158,0,0.25);
  padding: 60px 40px 24px;
  position: relative;
  z-index: 1;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,158,0,0.4), transparent);
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.footer-brand .footer-logo strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 10px;
}

.footer-col a:hover {
  color: var(--amber);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 10px;
}

.contact-item i {
  color: var(--amber);
  width: 16px;
  text-align: center;
}

.footer-copyright {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 13px;
  color: var(--text-muted);
}

.footer-copyright p {
  margin: 0;
}

.footer-copyright a {
  color: var(--text-sub);
}

.footer-copyright a:hover {
  color: var(--amber);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .site-main {
    margin-left: var(--nav-w);
  }

  .matrix-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 1024px) {
  .site-main {
    margin-left: 0;
  }

  .side-nav {
    transform: translateX(-100%);
    transition: transform .3s ease;
    width: 280px;
    box-shadow: 0 0 40px rgba(0,0,0,0.5);
  }

  body.menu-open .side-nav {
    transform: translateX(0);
  }

  body.menu-open::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: 999;
    backdrop-filter: blur(2px);
  }

  .mobile-topbar {
    display: flex;
    position: sticky;
    top: 0;
    z-index: 1002;
    height: 64px;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    background: rgba(14,23,41,0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  .mobile-topbar .mobile-brand {
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .hamburger {
    background: none;
    border: 1px solid rgba(255,255,255,0.16);
    width: 42px;
    height: 42px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    transition: border-color .2s ease;
  }

  .hamburger:hover {
    border-color: var(--amber);
  }

  .hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
  }

  .container {
    padding: 0 24px;
  }

  .page-hero {
    min-height: 480px;
  }

  .hero-inner {
    flex-direction: column;
    gap: 32px;
  }

  .hero-left, .hero-right {
    flex: none;
    width: 100%;
  }

  .info-panel {
    max-width: 560px;
  }

  .section-block {
    --section-space: 64px;
    padding: var(--section-space) 0;
  }

  .process-grid,
  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
    margin-left: 0;
  }

  .compare-layout {
    grid-template-columns: 1fr;
    margin-left: 0;
  }

  .filter-panel {
    max-width: none;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    margin-left: 0;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .page-hero h1 {
    font-size: 32px;
  }

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

  .section-desc {
    margin-left: 0;
  }

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

  .matrix-card-lg {
    grid-column: span 1;
  }

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

  .cta-card {
    flex-direction: column;
    padding: 32px 24px;
    text-align: left;
  }

  .cta-right {
    width: 100%;
  }

  .site-footer {
    padding: 40px 24px 20px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .page-hero {
    min-height: auto;
  }

  .hero-inner {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .process-grid,
  .scene-grid {
    grid-template-columns: 1fr;
    margin-left: 0;
  }

  .section-block {
    --section-space: 48px;
  }

  .info-panel {
    padding: 18px;
  }

  .info-panel-body .info-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .matrix-card {
    padding: 18px;
  }

  .filter-panel {
    padding: 18px;
  }

  .cta-card {
    padding: 28px 18px;
  }

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

  .faq-layout {
    margin-left: 0;
  }

  .footer-copyright p {
    font-size: 12px;
  }
}