/* roulang page: index */
:root {
            --primary: #0F172A;
            --primary-dark: #0B0F19;
            --primary-light: #1E293B;
            --accent: #E2A336;
            --accent-hover: #F59E0B;
            --accent-soft: rgba(226, 163, 54, 0.12);
            --bg-body: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --text-light: #94A3B8;
            --border-color: #E2E8F0;
            --border-dark: rgba(255, 255, 255, 0.1);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-float: 0 12px 32px -4px rgba(15, 23, 42, 0.12);
            --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            --font-family: system-ui, -apple-system, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: 1rem;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 顶部通栏 */
        .top-bar {
            background-color: var(--primary-dark);
            color: var(--text-light);
            font-size: 0.8125rem;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-dark);
        }

        .top-bar-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .top-bar-info {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .node-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #10B981;
        }

        .node-status::before {
            content: '';
            width: 8px;
            height: 8px;
            background-color: #10B981;
            border-radius: 50%;
            box-shadow: 0 0 8px #10B981;
        }

        /* 主导航条 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-smooth);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--primary);
            letter-spacing: -0.02em;
        }

        .brand-badge {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent) 0%, #B45309 100%);
            color: #FFFFFF;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.125rem;
            font-weight: 900;
            box-shadow: 0 4px 12px rgba(226, 163, 54, 0.3);
        }

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

        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 8px 0;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--accent);
        }

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

        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 0.9375rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition-smooth);
            text-align: center;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #0F172A;
            box-shadow: 0 4px 14px rgba(226, 163, 54, 0.25);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(226, 163, 54, 0.4);
        }

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

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

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

        .btn-dark:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 32px;
            height: 32px;
            position: relative;
        }

        .menu-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: var(--primary);
            position: absolute;
            left: 0;
            transition: var(--transition-smooth);
        }

        .menu-toggle span:nth-child(1) { top: 8px; }
        .menu-toggle span:nth-child(2) { top: 15px; }
        .menu-toggle span:nth-child(3) { top: 22px; }

        .menu-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* 基础 Section 布局 */
        .section {
            padding: 88px 0;
            position: relative;
        }

        .section-alt {
            background-color: #FFFFFF;
        }

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

        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 54px;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent);
            background-color: var(--accent-soft);
            padding: 4px 12px;
            border-radius: 9999px;
            margin-bottom: 14px;
        }

        .section-dark .section-tag {
            background-color: rgba(226, 163, 54, 0.2);
            color: #FBBF24;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--text-main);
            margin-bottom: 18px;
        }

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

        .section-subtitle {
            font-size: 1.0625rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .section-dark .section-subtitle {
            color: var(--text-light);
        }

        /* 1. HERO 产品截图舞台 */
        .hero-stage {
            padding: 80px 0 100px;
            background: radial-gradient(circle at 50% 20%, rgba(226, 163, 54, 0.08) 0%, transparent 60%),
                        linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .hero-intro {
            text-align: center;
            max-width: 860px;
            margin: 0 auto 40px;
        }

        .hero-headline {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -0.03em;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .hero-headline span {
            background: linear-gradient(135deg, var(--accent) 0%, #B45309 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.125rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            margin-bottom: 54px;
        }

        .stage-container {
            display: grid;
            grid-template-columns: 240px 1fr 240px;
            align-items: center;
            gap: 28px;
            position: relative;
        }

        .stage-side-card {
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-subtle);
            backdrop-filter: blur(8px);
            transition: var(--transition-smooth);
        }

        .stage-side-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
        }

        .stage-side-title {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .stage-side-title::before {
            content: '';
            width: 6px;
            height: 14px;
            background-color: var(--accent);
            border-radius: 2px;
        }

        .stage-side-desc {
            font-size: 0.84375rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .stage-screen-wrap {
            position: relative;
            background: #0F172A;
            border-radius: var(--radius-xl);
            padding: 12px;
            box-shadow: 0 24px 60px -12px rgba(15, 23, 42, 0.25);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .stage-screen-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 12px 14px;
        }

        .stage-dots {
            display: flex;
            gap: 6px;
        }

        .stage-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: #334155;
        }

        .stage-dots span:nth-child(1) { background-color: #EF4444; }
        .stage-dots span:nth-child(2) { background-color: #F59E0B; }
        .stage-dots span:nth-child(3) { background-color: #10B981; }

        .stage-screen-url {
            font-size: 0.75rem;
            color: #64748B;
            background: #1E293B;
            padding: 4px 16px;
            border-radius: 4px;
            letter-spacing: 0.05em;
        }

        .stage-screen-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* 2. 问题陈述与传统卡点 */
        .painpoint-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .painpoint-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            box-shadow: var(--shadow-subtle);
            border-top: 4px solid #CBD5E1;
            transition: var(--transition-smooth);
        }

        .painpoint-card:hover {
            border-top-color: #EF4444;
            transform: translateY(-4px);
            box-shadow: var(--shadow-float);
        }

        .painpoint-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: #94A3B8;
            margin-bottom: 12px;
        }

        .painpoint-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .painpoint-text {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 3. 指标看板 */
        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: linear-gradient(145deg, #FFFFFF 0%, #F8FAFC 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 24px;
            text-align: center;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .metric-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
        }

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

        .metric-val {
            font-size: 2.75rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .metric-val span {
            color: var(--accent);
        }

        .metric-label {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .metric-desc {
            font-size: 0.84375rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 4. 底层架构概览 */
        .arch-wrapper {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .arch-image-wrap {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-float);
            border: 1px solid var(--border-color);
        }

        .arch-image {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        .arch-spec-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .arch-spec-item {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
        }

        .arch-spec-item:hover {
            border-color: var(--accent);
            transform: translateX(4px);
        }

        .arch-spec-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .arch-spec-badge {
            font-size: 0.75rem;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
        }

        .arch-spec-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 5. 核心优势服务矩阵 (6卡片) */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
            position: relative;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-float);
            border-color: rgba(226, 163, 54, 0.5);
        }

        .feature-icon-box {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background-color: var(--accent-soft);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.375rem;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .feature-title {
            font-size: 1.1875rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .feature-text {
            font-size: 0.90625rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 6. 发行套件展台 (3卡片) */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-float);
            border-color: var(--accent);
        }

        .solution-img-box {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

        .solution-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

        .solution-content {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .solution-tag {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 10px;
        }

        .solution-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .solution-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 20px;
            flex: 1;
        }

        .solution-points {
            list-style: none;
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .solution-points li {
            font-size: 0.8125rem;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .solution-points li::before {
            content: '✓';
            color: #10B981;
            font-weight: bold;
        }

        /* 7. 深色模式对比看板 */
        .dark-comparison-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-dark);
            background: rgba(15, 23, 42, 0.6);
        }

        .dark-comparison-table th,
        .dark-comparison-table td {
            padding: 20px 24px;
            text-align: left;
            border-bottom: 1px solid var(--border-dark);
            font-size: 0.9375rem;
        }

        .dark-comparison-table th {
            background-color: rgba(30, 41, 59, 0.8);
            font-weight: 700;
            color: #FFFFFF;
        }

        .dark-comparison-table th.col-highlight {
            background-color: rgba(226, 163, 54, 0.15);
            color: #FBBF24;
            border-top: 3px solid var(--accent);
        }

        .dark-comparison-table td.col-highlight {
            background-color: rgba(226, 163, 54, 0.05);
            font-weight: 600;
            color: #FFFFFF;
        }

        .dark-comparison-table tr:last-child td {
            border-bottom: none;
        }

        .dark-comparison-table .dim-text {
            color: #94A3B8;
        }

        /* 8. 交付里程碑与链路 */
        .milestone-stepper {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .milestone-stepper::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 5%;
            width: 90%;
            height: 2px;
            background: var(--border-color);
            z-index: 1;
        }

        .milestone-step {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .milestone-circle {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background-color: #FFFFFF;
            border: 2px solid var(--border-color);
            color: var(--primary);
            font-size: 1.25rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            transition: var(--transition-smooth);
            box-shadow: var(--shadow-subtle);
        }

        .milestone-step:hover .milestone-circle {
            border-color: var(--accent);
            background-color: var(--accent);
            color: #0F172A;
            transform: scale(1.1);
        }

        .milestone-title {
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .milestone-desc {
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.6;
            padding: 0 8px;
        }

        /* 9. 深度实战案例场景 */
        .case-showcase {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
            display: grid;
            grid-template-columns: 1fr 1fr;
        }

        .case-media {
            position: relative;
            min-height: 380px;
        }

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

        .case-body {
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .case-tag {
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .case-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .case-text {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .case-stat-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
        }

        .case-stat-item h4 {
            font-size: 1.375rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .case-stat-item p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 10. 用户评价背书 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            box-shadow: var(--shadow-subtle);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testimonial-quote {
            font-size: 0.9375rem;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 24px;
            position: relative;
        }

        .testimonial-stars {
            color: #F59E0B;
            font-size: 0.9375rem;
            margin-bottom: 14px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--border-color);
            padding-top: 18px;
        }

        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
        }

        .testimonial-name {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--primary);
        }

        .testimonial-role {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 11. 研发资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

        .news-img-wrap {
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .news-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .news-card:hover .news-img {
            transform: scale(1.06);
        }

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

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .news-category {
            color: var(--accent);
            font-weight: 700;
        }

        .news-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .news-excerpt {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 16px;
            flex: 1;
        }

        .news-more-btn {
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

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

        /* 12. 安全保障体系 (4块防御) */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .security-box {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: var(--transition-smooth);
        }

        .security-box:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            background: rgba(30, 41, 59, 0.95);
        }

        .security-icon {
            font-size: 1.75rem;
            margin-bottom: 16px;
            display: inline-block;
        }

        .security-title {
            font-size: 1.125rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .security-desc {
            font-size: 0.84375rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* 13. FAQ 手风琴系统 */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

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

        .faq-item[open] {
            border-color: var(--accent);
            box-shadow: var(--shadow-subtle);
        }

        .faq-summary {
            padding: 22px 24px;
            font-size: 1.0625rem;
            font-weight: 700;
            color: var(--primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
        }

        .faq-summary::-webkit-details-marker {
            display: none;
        }

        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--bg-body);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.125rem;
            color: var(--text-muted);
            transition: var(--transition-smooth);
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            background-color: var(--accent);
            color: #0F172A;
        }

        .faq-content {
            padding: 0 24px 22px;
            font-size: 0.90625rem;
            color: var(--text-muted);
            line-height: 1.7;
            border-top: 1px solid #F1F5F9;
            margin-top: -6px;
            padding-top: 16px;
        }

        /* 14. 转化咨询表单收口 */
        .contact-layout {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 48px;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 54px;
            box-shadow: var(--shadow-float);
        }

        .contact-info-col h3 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .contact-info-col p {
            font-size: 0.9375rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .contact-sla-badge {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-bottom: 36px;
        }

        .sla-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .sla-dot {
            width: 8px;
            height: 8px;
            background-color: var(--accent);
            border-radius: 50%;
            margin-top: 8px;
        }

        .sla-text h5 {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 2px;
        }

        .sla-text span {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-label {
            font-size: 0.875rem;
            font-weight: 700;
            color: var(--primary);
        }

        .form-control {
            height: 48px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 0 16px;
            background-color: #F8FAFC;
            color: var(--text-main);
            transition: var(--transition-smooth);
        }

        textarea.form-control {
            height: 110px;
            padding: 14px 16px;
            resize: vertical;
        }

        .form-control:focus {
            background-color: #FFFFFF;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-soft);
        }

        /* 页脚统一规范 */
        .site-footer {
            background-color: var(--primary-dark);
            color: #94A3B8;
            border-top: 1px solid var(--border-dark);
            padding: 72px 0 32px;
            font-size: 0.875rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 54px;
        }

        .footer-brand h4 {
            font-size: 1.25rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand p {
            line-height: 1.7;
            margin-bottom: 20px;
            color: #64748B;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .footer-tech-specs {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 0.8125rem;
            color: #64748B;
        }

        .footer-tech-specs li {
            display: flex;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            padding-bottom: 6px;
        }

        .footer-tech-specs span {
            color: #E2E8F0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-dark);
            padding-top: 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            color: #64748B;
            font-size: 0.8125rem;
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-headline { font-size: 2.5rem; }
            .stage-container {
                grid-template-columns: 1fr;
            }
            .stage-side-card { display: none; }
            .painpoint-grid,
            .metric-grid,
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid,
            .solution-grid,
            .testimonial-grid,
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .arch-wrapper {
                grid-template-columns: 1fr;
            }
            .milestone-stepper {
                grid-template-columns: repeat(3, 1fr);
            }
            .milestone-stepper::before { display: none; }
            .case-showcase {
                grid-template-columns: 1fr;
            }
            .contact-layout {
                grid-template-columns: 1fr;
                padding: 36px 24px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-bar { display: none; }
            .nav-menu {
                position: fixed;
                top: 76px;
                left: 0;
                width: 100%;
                background-color: #FFFFFF;
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-float);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition-smooth);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .menu-toggle { display: block; }
            .section { padding: 60px 0; }
            .section-title { font-size: 1.875rem; }
            .hero-headline { font-size: 2rem; }
            .painpoint-grid,
            .metric-grid,
            .security-grid,
            .feature-grid,
            .solution-grid,
            .testimonial-grid,
            .news-grid,
            .milestone-stepper {
                grid-template-columns: 1fr;
            }
            .form-row { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .dark-comparison-table {
                display: block;
                overflow-x: auto;
            }
        }

        @media (max-width: 480px) {
            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }
            .hero-cta-group .btn {
                width: 100%;
            }
            .case-body { padding: 24px; }
            .case-stat-row { grid-template-columns: 1fr; }
        }