/* roulang page: index */
:root {
            --bg-page: #F6F8F9;
            --bg-card: #FFFFFF;
            --color-dark: #11161B;
            --color-title: #0D1117;
            --color-body: #343A40;
            --color-muted: #6C757D;
            --color-accent: #00C48C;
            --color-accent-hover: #00a876;
            --color-alert: #FF6B35;
            --border-color: #E5E7EB;
            --border-dark: #21262D;
            --radius-sm: 4px;
            --radius-md: 6px;
            --shadow-subtle: 0 10px 30px rgba(0, 0, 0, 0.04);
            --transition: all 180ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: var(--color-body);
        }

        body {
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* 顶部功能与主导航条 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
        }

        .top-utility-bar {
            background-color: #0D1117;
            color: #ADB5BD;
            font-size: 12px;
            padding: 6px 0;
            border-bottom: 1px solid var(--border-dark);
        }

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

        .top-utility-meta span {
            margin-right: 18px;
        }

        .top-utility-meta span b {
            color: #FFFFFF;
            font-weight: 500;
        }

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

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

        .brand-logo-badge {
            background: var(--color-dark);
            color: var(--color-accent);
            padding: 3px 8px;
            font-size: 11px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            text-transform: uppercase;
        }

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

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-body);
        }

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

        .header-action {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: var(--transition);
            min-height: 44px;
            border: 1px solid transparent;
        }

        .btn-primary {
            background-color: var(--color-dark);
            color: #FFFFFF;
            border-color: var(--color-dark);
        }

        .btn-primary:hover {
            background-color: #242c35;
            border-color: #242c35;
        }

        .btn-accent {
            background-color: var(--color-accent);
            color: #062319;
            font-weight: 700;
        }

        .btn-accent:hover {
            background-color: var(--color-accent-hover);
        }

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

        .btn-outline:hover {
            border-color: var(--color-dark);
            background-color: #FFFFFF;
        }

        .btn-outline-white {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.25);
        }

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

        /* 移动端汉堡按钮 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-dark);
            margin: 4px 0;
            transition: var(--transition);
        }

        /* 区块统一间距 */
        .page-section {
            padding: 100px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            margin-bottom: 50px;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--color-muted);
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 700;
            color: var(--color-title);
            line-height: 1.25;
            letter-spacing: -0.5px;
        }

        .section-desc {
            margin-top: 14px;
            font-size: 16px;
            color: var(--color-muted);
            max-width: 820px;
            line-height: 1.7;
        }

        /* 板块1：Hero 首屏（工业参数与双动作） */
        .hero-section {
            padding: 80px 0 100px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badge-group {
            display: flex;
            gap: 8px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .hero-badge {
            font-size: 12px;
            font-weight: 600;
            background: #EFF2F5;
            color: #2D3748;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            border: 1px solid #E2E8F0;
        }

        .hero-title {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.18;
            color: var(--color-title);
            letter-spacing: -1px;
            margin-bottom: 22px;
        }

        .hero-lead {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-body);
            margin-bottom: 34px;
        }

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

        .hero-visual-card {
            background: #0D1117;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .visual-window-bar {
            background: #161B22;
            padding: 10px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid var(--border-dark);
            font-size: 12px;
            color: #8B949E;
        }

        .visual-dot-group {
            display: flex;
            gap: 6px;
        }

        .visual-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #30363D;
        }

        .visual-scan-stage {
            position: relative;
            height: 380px;
            background-size: cover;
            background-position: center;
        }

        .scan-overlay-grid {
            position: absolute;
            inset: 0;
            background: linear-gradient(rgba(0, 196, 140, 0.08) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(0, 196, 140, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 20px;
        }

        .scan-crosshair {
            border: 1px solid var(--color-accent);
            width: 90px;
            height: 90px;
            position: absolute;
            top: 28%;
            left: 36%;
            border-radius: 2px;
        }

        .scan-crosshair::after {
            content: "DEFECT_PINHOLE_0.24mm [99.4%]";
            position: absolute;
            top: -22px;
            left: 0;
            background: var(--color-accent);
            color: #05261B;
            font-size: 10px;
            font-weight: 700;
            padding: 2px 6px;
            white-space: nowrap;
        }

        .scan-telemetry-hud {
            background: rgba(13, 17, 23, 0.88);
            border: 1px solid #30363D;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: #C9D1D9;
            font-family: monospace;
            font-size: 11px;
            line-height: 1.5;
            align-self: flex-start;
        }

        /* 参数速览数据条 */
        .spec-strip {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-top: 50px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            divide-x: 1px solid var(--border-color);
        }

        .spec-item {
            padding: 20px 24px;
        }

        .spec-label {
            font-size: 12px;
            color: var(--color-muted);
            text-transform: uppercase;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .spec-value {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-title);
        }

        .spec-sub {
            font-size: 11px;
            color: var(--color-muted);
            margin-top: 2px;
        }

        /* 板块2：问题陈述（传统汽车质检痛点） */
        .painpoint-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .painpoint-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: var(--radius-md);
            position: relative;
        }

        .painpoint-num {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-alert);
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .painpoint-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-title);
            margin-bottom: 12px;
        }

        .painpoint-text {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.7;
        }

        /* 板块3：技术架构穿透 */
        .arch-stack {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .arch-layer {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 30px;
            display: grid;
            grid-template-columns: 220px 1fr 240px;
            align-items: center;
            gap: 30px;
            transition: var(--transition);
        }

        .arch-layer:hover {
            border-color: #CBD5E1;
            box-shadow: var(--shadow-subtle);
        }

        .arch-layer-index {
            font-size: 11px;
            font-weight: 700;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }

        .arch-layer-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-title);
        }

        .arch-layer-desc {
            font-size: 14px;
            color: var(--color-body);
        }

        .arch-layer-tech {
            font-family: monospace;
            font-size: 12px;
            color: #4A5568;
            background: #F1F5F9;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            text-align: right;
        }

        /* 板块4：核心能力网格（6卡片） */
        .capabilities-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .cap-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .cap-card:hover {
            transform: translateY(-2px);
            border-color: #CBD5E1;
            box-shadow: var(--shadow-subtle);
        }

        .cap-thumb {
            height: 190px;
            background-color: #E2E8F0;
            overflow: hidden;
        }

        .cap-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .cap-body {
            padding: 24px;
        }

        .cap-code {
            font-size: 11px;
            font-weight: 700;
            color: var(--color-muted);
            letter-spacing: 1px;
            margin-bottom: 6px;
        }

        .cap-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-title);
            margin-bottom: 10px;
        }

        .cap-card-desc {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .cap-specs {
            border-top: 1px solid #F1F5F9;
            padding-top: 12px;
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: #64748B;
        }

        /* 板块5：操作演示 / 全流程执行路径 */
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .timeline-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            position: relative;
        }

        .timeline-step {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background: var(--color-dark);
            color: var(--color-accent);
            font-weight: 700;
            font-size: 13px;
            margin-bottom: 18px;
        }

        .timeline-time {
            font-size: 11px;
            color: var(--color-alert);
            font-weight: 600;
            margin-bottom: 6px;
            font-family: monospace;
        }

        .timeline-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-title);
            margin-bottom: 10px;
        }

        .timeline-desc {
            font-size: 13px;
            color: var(--color-body);
            line-height: 1.6;
        }

        /* 板块6：深色工业视觉与理念展示区 */
        .dark-philosophy-section {
            background-color: #0D1117;
            color: #C9D1D9;
            padding: 110px 0;
            border-bottom: 1px solid var(--border-dark);
        }

        .dark-philosophy-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .dark-lead-title {
            font-size: 38px;
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1.25;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .dark-lead-text {
            font-size: 16px;
            line-height: 1.8;
            color: #8B949E;
            margin-bottom: 30px;
        }

        .dark-metrics-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            border-top: 1px solid #21262D;
            padding-top: 24px;
        }

        .dark-metric-val {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-accent);
            font-family: monospace;
        }

        .dark-metric-lbl {
            font-size: 12px;
            color: #8B949E;
            margin-top: 4px;
        }

        .dark-preview-frame {
            border: 1px solid #30363D;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #161B22;
        }

        /* 板块7：横向视差/工业检测模型轨道 */
        .rail-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .rail-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .rail-media {
            height: 220px;
            position: relative;
            background-color: #1A202C;
        }

        .rail-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .rail-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(13, 17, 23, 0.85);
            color: #FFFFFF;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: var(--radius-sm);
        }

        .rail-info {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .rail-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-title);
            margin-bottom: 10px;
        }

        .rail-desc {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.65;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .rail-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid #F1F5F9;
            padding-top: 14px;
        }

        /* 板块8：实证案例墙与降本ROI数据 */
        .cases-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .case-block {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 34px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .case-header-bar {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 20px;
        }

        .case-cat {
            font-size: 12px;
            font-weight: 700;
            color: var(--color-muted);
            letter-spacing: 0.5px;
        }

        .case-roi-badge {
            background: #E6FBF5;
            color: #00875A;
            border: 1px solid #B3F5E3;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
        }

        .case-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-title);
            margin-bottom: 14px;
        }

        .case-desc {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .case-data-table {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            background: #F8FAFC;
            padding: 16px;
            border-radius: var(--radius-sm);
            border: 1px solid #EDF2F7;
        }

        .case-data-col span {
            display: block;
            font-size: 11px;
            color: var(--color-muted);
        }

        .case-data-col strong {
            font-size: 16px;
            color: var(--color-title);
            font-weight: 700;
        }

        /* 板块9：严苛工业质检关键数据统计条 */
        .metrics-banner {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .metric-cell {
            position: relative;
        }

        .metric-cell:not(:last-child)::after {
            content: "";
            position: absolute;
            right: -15px;
            top: 20%;
            height: 60%;
            width: 1px;
            background-color: var(--border-color);
        }

        .metric-digit {
            font-size: 40px;
            font-weight: 700;
            color: var(--color-title);
            letter-spacing: -1px;
            line-height: 1;
            margin-bottom: 8px;
        }

        .metric-unit {
            font-size: 18px;
            color: var(--color-accent);
            font-weight: 600;
            margin-left: 2px;
        }

        .metric-label {
            font-size: 14px;
            color: var(--color-body);
            font-weight: 500;
        }

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

        /* 板块10：品控工程专家真实反馈 */
        .stories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .story-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .story-quote {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.75;
            margin-bottom: 24px;
            position: relative;
        }

        .story-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid #F1F5F9;
            padding-top: 16px;
        }

        .story-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--color-dark);
            font-size: 14px;
            border: 1px solid var(--border-color);
        }

        .story-meta-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-title);
        }

        .story-meta-role {
            font-size: 12px;
            color: var(--color-muted);
        }

        /* 板块11：行业动态与算法白皮书摘要 */
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .insight-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 26px;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .insight-card:hover {
            border-color: #CBD5E1;
            box-shadow: var(--shadow-subtle);
        }

        .insight-date {
            font-size: 12px;
            color: var(--color-muted);
            margin-bottom: 8px;
            font-family: monospace;
        }

        .insight-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-title);
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .insight-summary {
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.65;
            margin-bottom: 18px;
            flex-grow: 1;
        }

        .insight-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-dark);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .insight-link:hover {
            color: var(--color-accent);
        }

        /* 板块12：手风琴 FAQ */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            background: none;
            border: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-title);
        }

        .faq-icon {
            font-size: 18px;
            color: var(--color-muted);
            transition: var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 250ms ease-out;
            padding: 0 24px;
            color: var(--color-body);
            font-size: 14px;
            line-height: 1.75;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--color-accent);
        }

        /* 板块13：部署接入线索表单区 */
        .cta-box-section {
            background: #0D1117;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-dark);
            padding: 60px;
            color: #FFFFFF;
        }

        .cta-box-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .cta-box-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-box-desc {
            font-size: 15px;
            color: #8B949E;
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
            background: #161B22;
            padding: 28px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-dark);
        }

        .form-group-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .form-input, .form-select {
            width: 100%;
            padding: 12px 14px;
            background: #0D1117;
            border: 1px solid #30363D;
            color: #FFFFFF;
            border-radius: var(--radius-sm);
            font-size: 14px;
            outline: none;
        }

        .form-input:focus, .form-select:focus {
            border-color: var(--color-accent);
        }

        .cta-form-btn {
            background: var(--color-accent);
            color: #05261B;
            font-weight: 700;
            font-size: 15px;
            padding: 14px;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }

        .cta-form-btn:hover {
            background: var(--color-accent-hover);
        }

        .form-privacy-note {
            font-size: 11px;
            color: #6E7681;
            text-align: center;
            margin-top: 6px;
        }

        /* 页脚系统 */
        .site-footer {
            background: #090D11;
            color: #8B949E;
            padding: 70px 0 30px;
            border-top: 1px solid var(--border-dark);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand-title {
            color: #FFFFFF;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .footer-brand-desc {
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .footer-heading {
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 13px;
        }

        .footer-links a:hover {
            color: var(--color-accent);
        }

        .footer-bottom {
            border-top: 1px solid #161B22;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #6E7681;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 响应式样式适配 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .capabilities-grid, .rail-container, .stories-grid, .insights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .painpoint-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .spec-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .spec-item:nth-child(2)::after {
                display: none;
            }
            .dark-philosophy-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .timeline-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-box-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-utility-bar {
                display: none;
            }
            .main-navbar {
                height: 60px;
            }
            .nav-links, .header-cta {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu-open .nav-links {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 61px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }
            .page-section {
                padding: 60px 0;
            }
            .hero-section {
                padding: 50px 0 60px;
            }
            .hero-title {
                font-size: 32px;
            }
            .section-title {
                font-size: 26px;
            }
            .capabilities-grid, .rail-container, .stories-grid, .insights-grid, .painpoint-grid, .cases-grid {
                grid-template-columns: 1fr;
            }
            .spec-strip {
                grid-template-columns: 1fr;
            }
            .timeline-grid {
                grid-template-columns: 1fr;
            }
            .arch-layer {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .arch-layer-tech {
                text-align: left;
            }
            .metrics-banner {
                grid-template-columns: 1fr 1fr;
                padding: 24px;
            }
            .metric-cell:not(:last-child)::after {
                display: none;
            }
            .cta-box-section {
                padding: 30px 20px;
            }
            .form-group-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }