/* roulang page: index */
:root {
            --bg-primary: #0D1117;
            --bg-body: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-card-alt: #F1F5F9;
            --text-primary: #0F172A;
            --text-secondary: #334155;
            --text-muted: #64748B;
            --accent-kinetic: #0284C7;
            --accent-kinetic-hover: #0369A1;
            --accent-pulse: #10B981;
            --accent-warn: #F59E0B;
            --border-subtle: #E2E8F0;
            --border-dark: #1E293B;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 14px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 24px -4px rgba(0,0,0,0.08);
            --transition-base: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

        /* 基础重置与排版规范 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--accent-kinetic);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover, a:focus {
            color: var(--accent-kinetic-hover);
        }

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

        .site-container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部状态栏与主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-subtle);
        }

        .top-bar-ticker {
            background-color: var(--bg-primary);
            color: #94A3B8;
            font-size: 12px;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .system-status-indicator {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            background-color: var(--accent-pulse);
            border-radius: 50%;
            display: inline-block;
            box-shadow: 0 0 8px var(--accent-pulse);
        }

        .main-navbar {
            padding: 14px 0;
        }

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

        .brand-logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .brand-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-kinetic), #0369A1);
            color: #FFFFFF;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 24px;
            align-items: center;
            margin: 0;
        }

        .nav-menu li a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 2px;
            position: relative;
        }

        .nav-menu li a:hover,
        .nav-menu li a.active {
            color: var(--accent-kinetic);
        }

        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--accent-kinetic);
            border-radius: 2px;
        }

        .btn-primary-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: var(--accent-kinetic);
            color: #FFFFFF !important;
            padding: 9px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid transparent;
            box-shadow: 0 2px 4px rgba(2, 132, 199, 0.2);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-primary-action:hover {
            background-color: var(--accent-kinetic-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
        }

        .btn-secondary-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: transparent;
            color: var(--text-primary);
            padding: 9px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--border-subtle);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-secondary-action:hover {
            border-color: var(--accent-kinetic);
            color: var(--accent-kinetic);
            background-color: #F0F9FF;
        }

        /* 全局通用板块布局 */
        .page-section {
            padding: 72px 0;
            position: relative;
        }

        .section-alt {
            background-color: #FFFFFF;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-dark {
            background-color: var(--bg-primary);
            color: #F8FAFC;
        }

        .section-header {
            max-width: 800px;
            margin: 0 auto 48px auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent-kinetic);
            background-color: rgba(2, 132, 199, 0.1);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-dark .section-tag {
            background-color: rgba(2, 132, 199, 0.2);
            color: #38BDF8;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

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

        .section-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }

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

        /* 板块一：Hero 资源下载与检索风格 */
        .hero-section {
            padding: 88px 0 72px 0;
            background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-subtle);
        }

        .hero-bg-media {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.06;
            object-fit: cover;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #E0F2FE;
            color: var(--accent-kinetic);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 20px;
            border: 1px solid rgba(2, 132, 199, 0.2);
        }

        .hero-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-lead-text {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 36px;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-search-box {
            display: flex;
            align-items: center;
            max-width: 640px;
            margin: 0 auto 24px auto;
            background: #FFFFFF;
            border: 2px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 6px 8px 6px 16px;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05);
            transition: var(--transition-base);
        }

        .hero-search-box:focus-within {
            border-color: var(--accent-kinetic);
            box-shadow: 0 12px 30px -5px rgba(2, 132, 199, 0.15);
        }

        .hero-search-input {
            border: none !important;
            box-shadow: none !important;
            margin: 0 !important;
            height: 44px !important;
            font-size: 15px;
            background: transparent;
            color: var(--text-primary);
            flex: 1;
        }

        .hero-search-input:focus {
            outline: none;
        }

        .quick-tags-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 36px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .tag-pill {
            background-color: #FFFFFF;
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            padding: 4px 12px;
            border-radius: 16px;
            transition: var(--transition-base);
        }

        .tag-pill:hover {
            border-color: var(--accent-kinetic);
            color: var(--accent-kinetic);
        }

        .hero-metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            max-width: 820px;
            margin: 0 auto;
            background: #FFFFFF;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow-md);
        }

        .metric-cell {
            text-align: left;
            border-right: 1px solid var(--border-subtle);
            padding-right: 14px;
        }

        .metric-cell:last-child {
            border-right: none;
            padding-right: 0;
        }

        .metric-value {
            font-size: 22px;
            font-weight: 800;
            color: var(--accent-kinetic);
            font-family: Consolas, Monaco, monospace;
        }

        .metric-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 栅格与卡片组件规范 */
        .grid-matrix-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: center;
        }

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

        .grid-matrix-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .card-custom:hover {
            border-color: var(--accent-kinetic);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background-color: #E0F2FE;
            color: var(--accent-kinetic);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
        }

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

        .card-body-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 16px;
        }

        .card-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: var(--accent-pulse);
            background-color: rgba(16, 185, 129, 0.1);
            padding: 3px 8px;
            border-radius: 4px;
            align-self: flex-start;
        }

        /* 规格表格卡片 */
        .spec-list-wrap {
            background: #FFFFFF;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .spec-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 14px;
        }

        .spec-row:last-child {
            border-bottom: none;
        }

        .spec-label {
            color: var(--text-secondary);
            font-weight: 500;
        }

        .spec-value {
            color: var(--text-primary);
            font-weight: 600;
            font-family: Consolas, Monaco, monospace;
        }

        /* 深色架构板块连线 */
        .arch-flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .arch-node {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }

        .arch-node::after {
            content: '→';
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent-kinetic);
            font-size: 20px;
            font-weight: bold;
        }

        .arch-node:last-child::after {
            display: none;
        }

        .arch-step-num {
            font-size: 12px;
            font-weight: 700;
            color: #38BDF8;
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        .arch-title {
            font-size: 16px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .arch-text {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.6;
            margin: 0;
        }

        /* 实施流程步进器 */
        .step-timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-timeline-card {
            background: #FFFFFF;
            border-top: 3px solid var(--accent-kinetic);
            border-radius: var(--radius-sm);
            padding: 24px 20px;
            border-left: 1px solid var(--border-subtle);
            border-right: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .step-index-badge {
            font-size: 20px;
            font-weight: 800;
            color: var(--accent-kinetic);
            margin-bottom: 12px;
        }

        /* 标杆案例大图卡片 */
        .case-card {
            background: #FFFFFF;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition-base);
        }

        .case-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--accent-kinetic);
        }

        .case-img-wrap {
            height: 200px;
            overflow: hidden;
            background: #E2E8F0;
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: var(--transition-base);
        }

        .case-card:hover .case-img-wrap img {
            transform: scale(1.04);
        }

        .case-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .case-metrics-bar {
            display: flex;
            gap: 16px;
            margin: 16px 0;
            padding: 12px;
            background: var(--bg-card-alt);
            border-radius: var(--radius-sm);
        }

        .case-metric-item {
            flex: 1;
        }

        .case-metric-digit {
            font-size: 16px;
            font-weight: 700;
            color: var(--accent-kinetic);
        }

        .case-metric-label {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* 遥测计数条 */
        .telemetry-strip {
            background: #0F172A;
            padding: 40px 0;
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
        }

        .telemetry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .telemetry-num {
            font-size: 36px;
            font-weight: 800;
            color: #38BDF8;
            font-family: Consolas, Monaco, monospace;
            margin-bottom: 4px;
        }

        .telemetry-title {
            font-size: 13px;
            color: #94A3B8;
        }

        /* 常见疑问 Foundation 手风琴现代定制 */
        .accordion-wrapper {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion {
            background: transparent !important;
            border: none !important;
            margin: 0 !important;
        }

        .accordion-item {
            background: #FFFFFF !important;
            border: 1px solid var(--border-subtle) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .accordion-title {
            padding: 18px 24px !important;
            font-size: 16px !important;
            font-weight: 600 !important;
            color: var(--text-primary) !important;
            background: #FFFFFF !important;
            border: none !important;
            transition: var(--transition-base);
        }

        .accordion-title:hover {
            background: #F8FAFC !important;
            color: var(--accent-kinetic) !important;
        }

        .accordion-content {
            padding: 20px 24px !important;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            background: #FFFFFF !important;
            border-top: 1px solid var(--border-subtle) !important;
        }

        /* 试用申请询盘表单 */
        .inquiry-card {
            max-width: 760px;
            margin: 0 auto;
            background: #FFFFFF;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: var(--shadow-lg);
        }

        .form-row-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .form-input, .form-select {
            width: 100%;
            height: 44px;
            padding: 10px 14px;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-primary);
            background: #FFFFFF;
            box-shadow: none !important;
            transition: var(--transition-base);
        }

        .form-input:focus, .form-select:focus {
            border-color: var(--accent-kinetic);
            outline: none;
            box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1) !important;
        }

        /* 页脚区域规范 */
        .site-footer {
            background-color: var(--bg-primary);
            color: #94A3B8;
            padding-top: 64px;
            font-size: 14px;
            border-top: 1px solid var(--border-dark);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-col-title {
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: -0.2px;
        }

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

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

        .footer-list a {
            color: #94A3B8;
        }

        .footer-list a:hover {
            color: #38BDF8;
        }

        .sub-footer-strip {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: #64748B;
        }

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        /* 响应式断点适配 */
        @media screen and (max-width: 1024px) {
            .hero-title { font-size: 34px; }
            .grid-matrix-4, .arch-flow-grid, .step-timeline-grid, .telemetry-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .arch-node::after { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media screen and (max-width: 768px) {
            .nav-menu { display: none; }
            .hero-title { font-size: 28px; }
            .grid-matrix-2, .grid-matrix-3, .form-row-2 { grid-template-columns: 1fr; }
            .hero-metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .metric-cell:nth-child(2) { border-right: none; }
            .sub-footer-strip { flex-direction: column; gap: 12px; text-align: center; }
            .footer-grid { grid-template-columns: 1fr; }
        }

        @media screen and (max-width: 520px) {
            .page-section { padding: 48px 0; }
            .section-title { font-size: 24px; }
            .hero-metrics-grid, .grid-matrix-4, .step-timeline-grid, .telemetry-grid { grid-template-columns: 1fr; }
            .metric-cell { border-right: none; border-bottom: 1px solid var(--border-subtle); padding-bottom: 10px; }
            .metric-cell:last-child { border-bottom: none; }
            .inquiry-card { padding: 20px; }
        }