/* roulang page: index */
:root {
            --primary: #0F172A;
            --primary-accent: #10B981;
            --primary-accent-hover: #059669;
            --secondary: #1E293B;
            --muted-slate: #64748B;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-light: #94A3B8;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #0B0F19;
            --bg-card: #FFFFFF;
            --border-light: rgba(226, 232, 240, 0.8);
            --border-dark: rgba(51, 65, 85, 0.6);
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 基础重置 */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        button, input, textarea, select {
            font: inherit;
            border: none;
            outline: none;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* 标签与徽章 */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            font-size: 0.8125rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary-accent);
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .badge-dark {
            background: rgba(255, 255, 255, 0.08);
            color: #34D399;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: var(--transition);
            min-height: 46px;
        }

        .btn-primary {
            background-color: var(--primary-accent);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
        }

        .btn-primary:hover {
            background-color: var(--primary-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-dark);
            border: 1px solid var(--border-light);
            background-color: #FFFFFF;
        }

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

        .btn-dark {
            background: #FFFFFF;
            color: var(--primary);
            font-weight: 700;
        }

        .btn-dark:hover {
            background: #E2E8F0;
            transform: translateY(-2px);
        }

        /* 板块公用 */
        .section {
            padding: 90px 0;
            position: relative;
        }

        .section-header {
            max-width: 780px;
            margin: 0 auto 50px auto;
            text-align: center;
        }

        .section-title {
            font-size: 2.125rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-top: 12px;
            margin-bottom: 16px;
            line-height: 1.35;
            letter-spacing: -0.02em;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--muted-slate);
            line-height: 1.75;
        }

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

        .section-dark {
            background-color: var(--bg-dark);
            color: #F1F5F9;
        }

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

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

        /* 顶部公告条与主导航 */
        .top-bar {
            background-color: #070B13;
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: #10B981;
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px #10B981;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
        }

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

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.01em;
        }

        .brand-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #10B981 0%, #059669 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 1.1rem;
        }

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

        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-body);
            position: relative;
            padding: 6px 0;
        }

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

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

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

        .header-cta {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            background: none;
            color: var(--text-dark);
            cursor: pointer;
        }

        /* 板块一：Hero 区域 (选型高亮结构) */
        .hero-section {
            padding: 80px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(15, 23, 42, 0.04) 0%, transparent 40%),
                        #F8FAFC;
            position: relative;
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 40px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.75rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text-dark);
            margin: 18px 0 20px 0;
            letter-spacing: -0.03em;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--muted-slate);
            line-height: 1.8;
            margin-bottom: 30px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 36px;
        }

        .hero-tag-item {
            font-size: 0.875rem;
            padding: 6px 14px;
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-weight: 500;
        }

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

        /* 推荐选型高亮卡片 */
        .hero-pricing-card {
            background: #FFFFFF;
            border: 2px solid var(--primary-accent);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .card-recommend-badge {
            position: absolute;
            top: -14px;
            right: 28px;
            background: var(--primary-accent);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .card-plan-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .card-plan-desc {
            font-size: 0.875rem;
            color: var(--muted-slate);
            margin-bottom: 20px;
        }

        .card-specs-list {
            list-style: none;
            margin-bottom: 28px;
        }

        .card-specs-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9375rem;
            color: var(--text-body);
            padding: 8px 0;
            border-bottom: 1px dashed #F1F5F9;
        }

        .card-specs-list li i {
            color: var(--primary-accent);
            font-size: 0.9rem;
        }

        /* 板块二：卖点三连 */
        .feature-trio-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(16, 185, 129, 0.4);
            box-shadow: var(--shadow-md);
        }

        .feature-icon-wrapper {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 0.9375rem;
            color: var(--muted-slate);
            line-height: 1.7;
        }

        /* 板块三：产品介绍与全链路拆解 */
        .split-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .split-image-box {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            position: relative;
        }

        .split-image-box img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .split-image-box:hover img {
            transform: scale(1.03);
        }

        .split-content h3 {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 18px;
            line-height: 1.35;
        }

        .split-content p {
            font-size: 1rem;
            color: var(--muted-slate);
            margin-bottom: 24px;
            line-height: 1.75;
        }

        .protocol-pill-list {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .protocol-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #F1F5F9;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-dark);
        }

        /* 板块四：技术优势 6 卡网格 */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .adv-card {
            background: #FFFFFF;
            padding: 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

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

        .adv-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 14px 0 10px 0;
        }

        .adv-card p {
            font-size: 0.875rem;
            color: var(--muted-slate);
            line-height: 1.65;
        }

        /* 板块五：深色架构图解 */
        .architecture-wrapper {
            background: #111827;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 44px;
            margin-top: 20px;
        }

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

        .arch-node {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }

        .arch-node-icon {
            font-size: 1.8rem;
            color: #34D399;
            margin-bottom: 12px;
        }

        .arch-node h5 {
            font-size: 1.05rem;
            color: #FFFFFF;
            margin-bottom: 8px;
        }

        .arch-node p {
            font-size: 0.8125rem;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* 板块六：场景矩阵 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

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

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

        .scenario-img {
            height: 160px;
            width: 100%;
            object-fit: cover;
        }

        .scenario-body {
            padding: 20px;
        }

        .scenario-body h4 {
            font-size: 1.1rem;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .scenario-body p {
            font-size: 0.875rem;
            color: var(--muted-slate);
            line-height: 1.6;
        }

        /* 板块七：前后对比 Before/After */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .compare-col {
            padding: 36px;
            border-radius: var(--radius-lg);
        }

        .compare-traditional {
            background: #F1F5F9;
            border: 1px solid #E2E8F0;
        }

        .compare-modern {
            background: #ECFDF5;
            border: 2px solid #10B981;
            position: relative;
        }

        .compare-badge-modern {
            position: absolute;
            top: 20px;
            right: 20px;
            background: #10B981;
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-full);
        }

        .compare-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .compare-list {
            list-style: none;
        }

        .compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 16px;
            font-size: 0.9375rem;
        }

        /* 板块八：数据指标条 */
        .metrics-banner {
            background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
            padding: 60px 0;
            color: #FFFFFF;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .metric-item-val {
            font-size: 2.75rem;
            font-weight: 800;
            color: #34D399;
            line-height: 1.1;
            font-variant-numeric: tabular-nums;
            margin-bottom: 8px;
        }

        .metric-item-label {
            font-size: 0.9375rem;
            color: #94A3B8;
        }

        /* 板块九：行业客户评价背书 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 30px;
            box-shadow: var(--shadow-sm);
        }

        .testimonial-text {
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 20px;
            font-style: italic;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .user-meta h5 {
            font-size: 0.9375rem;
            color: var(--text-dark);
            margin: 0;
        }

        .user-meta span {
            font-size: 0.8125rem;
            color: var(--muted-slate);
        }

        /* 板块十：行业资讯动态 */
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .insight-img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }

        .insight-content {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .insight-date {
            font-size: 0.75rem;
            color: var(--muted-slate);
            margin-bottom: 8px;
        }

        .insight-content h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .insight-content p {
            font-size: 0.875rem;
            color: var(--muted-slate);
            line-height: 1.6;
        }

        /* 板块十一：FAQ 手风琴 */
        .faq-wrapper {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-question i {
            color: var(--muted-slate);
            transition: transform 0.3s ease;
        }

        .faq-answer {
            padding: 0 24px 20px 24px;
            font-size: 0.9375rem;
            color: var(--text-body);
            line-height: 1.7;
            display: none;
            border-top: 1px solid #F8FAFC;
        }

        .faq-item.active {
            border-color: var(--primary-accent);
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary-accent);
        }

        /* 板块十二：保障条 + CTA 线索投递区 */
        .guarantee-bar {
            background: #F1F5F9;
            padding: 30px 0;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

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

        .guarantee-item {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-dark);
        }

        .guarantee-item i {
            font-size: 1.25rem;
            color: var(--primary-accent);
        }

        .cta-box {
            background: linear-gradient(135deg, #0F172A 0%, #070B13 100%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            color: #FFFFFF;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .cta-form {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 32px;
            color: var(--text-dark);
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-dark);
        }

        .form-control {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #CBD5E1;
            border-radius: var(--radius-sm);
            font-size: 0.9375rem;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary-accent);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
        }

        /* 页脚规范 */
        .site-footer {
            background-color: #070B13;
            color: #94A3B8;
            padding: 80px 0 30px 0;
            font-size: 0.875rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-brand h4 {
            color: #FFFFFF;
            font-size: 1.25rem;
            margin-bottom: 16px;
        }

        .footer-col h5 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
        }

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

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

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8125rem;
        }

        /* 移动端浮动转化条 */
        .mobile-sticky-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(10px);
            padding: 12px 20px;
            z-index: 999;
            box-shadow: 0 -4px 15px rgba(0,0,0,0.1);
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid, .split-box, .compare-grid, .cta-box {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .feature-trio-grid, .advantages-grid, .testimonials-grid, .insights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenarios-grid, .arch-nodes-grid, .guarantee-items {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .site-header {
                height: 64px;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 24px 20px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                gap: 16px;
            }
            .nav-menu.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .header-cta .btn {
                display: none;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .feature-trio-grid, .advantages-grid, .testimonials-grid, .insights-grid, .scenarios-grid, .arch-nodes-grid, .metrics-grid, .guarantee-items {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 30px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .mobile-sticky-bar {
                display: block;
            }
        }