/* roulang page: index */
:root {
            --primary: #112A38;
            --primary-dark: #0B1924;
            --primary-light: #1D3B4E;
            --accent: #E67E22;
            --accent-hover: #D35400;
            --accent-light: #FDEBD0;
            --success: #2ECC71;
            --info: #2980B9;
            --danger: #E74C3C;
            --bg-page: #F8FAFB;
            --bg-card: #FFFFFF;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(17, 42, 56, 0.04);
            --shadow-md: 0 8px 24px -4px rgba(17, 42, 56, 0.08);
            --shadow-lg: 0 16px 36px -6px rgba(17, 42, 56, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --container-max: 1200px;
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部工具条 */
        .utility-bar {
            height: 38px;
            background-color: #0D222E;
            color: #94A3B8;
            font-size: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
        }

        .utility-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .utility-badges {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .dot-online {
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: var(--success);
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px var(--success);
        }

        .utility-contact {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .utility-contact a:hover {
            color: #FFFFFF;
        }

        /* 主导航栏 */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            box-shadow: 0 4px 10px rgba(17, 42, 56, 0.2);
        }

        .brand-icon svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 28px;
        }

        .nav-item a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 0;
            position: relative;
        }

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

        .nav-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            transition: var(--transition);
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            text-align: center;
            gap: 8px;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(230, 126, 34, 0.35);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(230, 126, 34, 0.45);
        }

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

        .btn-outline:hover {
            border-color: var(--primary);
            background-color: rgba(17, 42, 56, 0.04);
        }

        .btn-outline-white {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.3);
        }

        .btn-outline-white:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: #FFFFFF;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--primary);
        }

        .hamburger svg {
            width: 26px;
            height: 26px;
            fill: currentColor;
        }

        /* 移动端菜单抽屉 */
        .mobile-drawer {
            position: fixed;
            top: 110px;
            left: 0;
            width: 100%;
            background: #FFFFFF;
            padding: 24px;
            box-shadow: var(--shadow-lg);
            border-bottom: 1px solid var(--border-color);
            display: none;
            flex-direction: column;
            gap: 16px;
            z-index: 999;
        }

        .mobile-drawer.active {
            display: flex;
        }

        .mobile-drawer a {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-title);
            padding: 10px 0;
            border-bottom: 1px solid #F1F5F9;
        }

        /* 通用区块排版 */
        .section-block {
            padding: 88px 0;
            position: relative;
        }

        .section-block-alt {
            background-color: #F1F5F9;
        }

        .section-block-dark {
            background-color: var(--primary-dark);
            color: #E2E8F0;
        }

        .section-header {
            max-width: 780px;
            margin: 0 auto 56px auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
            background: rgba(230, 126, 34, 0.1);
            padding: 4px 12px;
            border-radius: 20px;
        }

        .section-block-dark .section-tag {
            background: rgba(230, 126, 34, 0.2);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .section-block-dark .section-title {
            color: #FFFFFF;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .section-block-dark .section-desc {
            color: #94A3B8;
        }

        /* 板块 01: Hero 门户双栏 */
        .hero-section {
            padding: 72px 0 96px 0;
            background: linear-gradient(135deg, rgba(17, 42, 56, 0.03) 0%, rgba(248, 250, 251, 1) 100%),
                        url('/assets/images/081bd51178dafc0b.webp') center/cover no-repeat;
            position: relative;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(248, 250, 251, 0.94) 0%, rgba(248, 250, 251, 0.98) 100%);
        }

        .hero-container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.25;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }

        .hero-desc {
            font-size: 17px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 40px;
        }

        .protocol-strip {
            display: flex;
            align-items: center;
            gap: 20px;
            border-top: 1px solid rgba(17, 42, 56, 0.1);
            padding-top: 24px;
        }

        .protocol-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .protocol-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .protocol-pill {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background-color: #FFFFFF;
            border: 1px solid #CBD5E1;
            padding: 4px 10px;
            border-radius: 4px;
        }

        /* Hero 右侧快捷入口与控制台 */
        .gateway-mockup {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .mockup-header {
            background-color: var(--primary);
            color: #FFFFFF;
            padding: 16px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .mockup-title {
            font-size: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mockup-status {
            font-size: 12px;
            background: rgba(46, 204, 113, 0.2);
            color: #2ECC71;
            padding: 3px 8px;
            border-radius: 4px;
            border: 1px solid rgba(46, 204, 113, 0.4);
        }

        .mockup-body {
            padding: 24px;
        }

        .system-metrics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 24px;
            background: #F8FAFC;
            padding: 14px;
            border-radius: var(--radius-sm);
            border: 1px solid #EEF2F6;
        }

        .metric-cell {
            text-align: center;
        }

        .metric-cell-val {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
        }

        .metric-cell-lbl {
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .quick-actions-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .quick-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .quick-tile {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 14px;
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            transition: var(--transition);
        }

        .quick-tile:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .tile-icon {
            width: 34px;
            height: 34px;
            background: rgba(17, 42, 56, 0.05);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }

        .quick-tile:hover .tile-icon {
            background: var(--accent);
            color: #FFFFFF;
        }

        .tile-text h4 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-title);
        }

        .tile-text p {
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* 板块 02: 互联痛点洞察 */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .pain-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 32px 24px;
            border: 1px solid var(--border-color);
            border-top: 4px solid var(--danger);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

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

        .pain-index {
            font-size: 12px;
            font-weight: 700;
            color: var(--danger);
            background: rgba(231, 76, 60, 0.1);
            display: inline-block;
            padding: 2px 8px;
            border-radius: 4px;
            margin-bottom: 16px;
        }

        .pain-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 12px;
        }

        .pain-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 板块 03: 核心架构与产品介绍 */
        .arch-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .arch-visual-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-md);
        }

        .arch-img-box {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 20px;
            position: relative;
        }

        .arch-img-box img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

        .arch-chips {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
        }

        .arch-chip-item {
            background: #F8FAFC;
            border: 1px solid #EEF2F6;
            padding: 12px;
            border-radius: var(--radius-sm);
            text-align: center;
        }

        .arch-chip-item strong {
            display: block;
            font-size: 15px;
            color: var(--primary);
        }

        .arch-chip-item span {
            font-size: 11px;
            color: var(--text-muted);
        }

        .arch-info-header h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .arch-info-header p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .feature-check-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .feature-check-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--text-body);
        }

        .check-badge {
            width: 20px;
            height: 20px;
            background: rgba(46, 204, 113, 0.15);
            color: var(--success);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
            font-size: 12px;
            font-weight: 700;
        }

        /* 板块 04: 技术优势六宫格 */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .matrix-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .matrix-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }

        .matrix-icon {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, rgba(17, 42, 56, 0.08), rgba(230, 126, 34, 0.1));
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 22px;
        }

        .matrix-card:hover .matrix-icon {
            background: var(--primary);
            color: #FFFFFF;
        }

        .matrix-icon svg {
            width: 26px;
            height: 26px;
            fill: currentColor;
        }

        .matrix-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 12px;
        }

        .matrix-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 板块 05: 场景方案 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scenario-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

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

        .scenario-thumb {
            height: 210px;
            overflow: hidden;
            position: relative;
        }

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

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

        .scenario-category {
            position: absolute;
            bottom: 14px;
            left: 14px;
            background: rgba(17, 42, 56, 0.85);
            color: #FFFFFF;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 4px;
            backdrop-filter: blur(4px);
        }

        .scenario-content {
            padding: 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .scenario-content h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 12px;
        }

        .scenario-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
            flex: 1;
        }

        .hardware-list {
            background: #F8FAFC;
            border: 1px solid #EEF2F6;
            border-radius: var(--radius-sm);
            padding: 12px 14px;
            font-size: 12px;
            color: var(--text-body);
        }

        .hardware-list strong {
            display: block;
            color: var(--primary);
            margin-bottom: 4px;
        }

        /* 板块 06: 系统接入四步骤 */
        .steps-pipeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .step-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .step-item:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .step-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 16px;
            opacity: 0.9;
        }

        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 板块 07: 工业级安全底座 */
        .security-topo-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .sec-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
        }

        .sec-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
            transform: translateY(-4px);
        }

        .sec-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px auto;
            background: rgba(230, 126, 34, 0.15);
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .sec-icon svg {
            width: 28px;
            height: 28px;
            fill: currentColor;
        }

        .sec`.section-heading {\n            font-size: 2.5rem;\n            margin-bottom: 1rem;\n        }\n\n        .section-content {\n            margin-bottom: 2rem;\n        }\n\n        footer {\n            background-color: #f0f0f0;\n            padding: 1rem 0;\n            text-align: center;\n            font-size: 0.8rem;\n        }\n