/* roulang page: index */
:root {
            --primary: #10B981;
            --primary-glow: #00F5A0;
            --accent-orange: #FF5722;
            --bg-dark: #0D1117;
            --bg-darker: #090D12;
            --bg-card: #161B22;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --text-pure: #F0F6FC;
            --text-muted: #94A3B8;
            --text-dark: #0F172A;
            --text-dark-muted: #475569;
            --border-dim: rgba(255, 255, 255, 0.08);
            --border-light: #E2E8F0;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-subtle: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 100px;
            font-family: var(--font-stack);
            background-color: var(--bg-dark);
            color: var(--text-pure);
        }

        body {
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }

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

        .tabular {
            font-variant-numeric: tabular-nums;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通栏工具条 */
        .top-utility-bar {
            background: rgba(9, 13, 18, 0.85);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-dim);
            height: 38px;
            display: flex;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
            position: relative;
            z-index: 101;
        }

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

        .top-contact-info span {
            margin-right: 20px;
        }

        .top-contact-info a:hover {
            color: var(--primary-glow);
        }

        .top-status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            background: var(--primary-glow);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--primary-glow);
        }

        /* 主导航条 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dim);
            height: 72px;
            display: flex;
            align-items: center;
        }

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

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

        .brand-logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-glow));
            border-radius: 8px;
            display: grid;
            place-items: center;
            color: var(--bg-dark);
            font-weight: 900;
            font-size: 18px;
        }

        .nav-links {
            display: flex;
            gap: 24px;
            list-style: none;
        }

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

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-pure);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-glow);
            transition: width 0.25s ease;
        }

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

        .nav-cta {
            background: var(--accent-orange);
            color: #fff;
            padding: 10px 20px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px rgba(255, 87, 34, 0.35);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 87, 34, 0.45);
        }

        .nav-cta:active {
            transform: scale(0.98);
        }

        /* 移动端菜单切换 */
        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-pure);
            margin: 5px 0;
            transition: 0.3s;
        }

        /* 通用板块与排版 */
        .section-padding {
            padding: 90px 0;
            position: relative;
        }

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

        .section-tag {
            display: inline-block;
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 12px;
            padding: 4px 12px;
            background: rgba(16, 185, 129, 0.1);
            border-radius: 4px;
            border: 1px solid rgba(16, 185, 129, 0.25);
        }

        .section-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.5px;
            color: inherit;
        }

        .section-intro {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 780px;
            margin: 16px auto 0;
        }

        /* 浅色板块主题 */
        .theme-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
        }

        .theme-light .section-intro {
            color: var(--text-dark-muted);
        }

        .theme-light .card {
            background: var(--bg-white);
            border-color: var(--border-light);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
        }

        .theme-light .card-title {
            color: var(--text-dark);
        }

        .theme-light .card-desc {
            color: var(--text-dark-muted);
        }

        /* 基础卡片 */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

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

        /* 板块 1: Hero 获客提问式首屏 */
        .hero-section {
            padding: 90px 0 110px;
            background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.12) 0%, rgba(13, 17, 23, 0) 70%),
                        linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
            border-bottom: 1px solid var(--border-dim);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 60px;
            align-items: center;
        }

        .hero-title {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 24px;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--text-pure) 30%, var(--primary-glow) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-badges-row {
            display: flex;
            gap: 16px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }

        .hero-badge-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-dim);
            padding: 10px 16px;
            border-radius: var(--radius-md);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-badge-item strong {
            color: var(--primary-glow);
            font-size: 18px;
        }

        .hero-form-card {
            background: var(--bg-card);
            border: 1px solid rgba(16, 185, 129, 0.3);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            position: relative;
        }

        .hero-form-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20%;
            right: 20%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
        }

        .hero-form-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .hero-form-subtitle {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

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

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

        .form-control {
            width: 100%;
            height: 44px;
            background: rgba(9, 13, 18, 0.8);
            border: 1px solid var(--border-dim);
            border-radius: 8px;
            padding: 0 14px;
            color: var(--text-pure);
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
        }

        .btn-submit {
            width: 100%;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-orange), #E64A19);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            box-shadow: 0 8px 20px rgba(255, 87, 34, 0.35);
            transition: all 0.2s;
            margin-top: 10px;
        }

        .btn-submit:hover {
            opacity: 0.95;
            transform: translateY(-1px);
        }

        .btn-submit:active {
            transform: scale(0.99);
        }

        /* 板块 2: 系统架构概览 */
        .arch-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .arch-media img {
            border: 1px solid var(--border-dim);
            box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
        }

        .arch-points {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 24px;
        }

        .arch-point-item {
            display: flex;
            gap: 16px;
        }

        .arch-icon {
            width: 42px;
            height: 42px;
            border-radius: 8px;
            background: rgba(16, 185, 129, 0.1);
            border: 1px solid rgba(16, 185, 129, 0.3);
            display: grid;
            place-items: center;
            color: var(--primary-glow);
            font-weight: bold;
            flex-shrink: 0;
        }

        /* 板块 3: 监测指标网格 (6卡片) */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            overflow: hidden;
        }

        .feature-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .feature-badge {
            width: 36px;
            height: 36px;
            background: rgba(16, 185, 129, 0.15);
            color: var(--primary-glow);
            border-radius: 8px;
            display: grid;
            place-items: center;
            font-weight: 700;
            font-size: 15px;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 600;
        }

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

        /* 板块 4: 硬件与终端产品区 */
        .hardware-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .hw-card {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .hw-media {
            height: 210px;
            overflow: hidden;
            background: #f1f5f9;
        }

        .hw-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.35s ease;
        }

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

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

        .hw-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .hw-specs {
            margin: 16px 0;
            border-top: 1px dashed var(--border-light);
            border-bottom: 1px dashed var(--border-light);
            padding: 12px 0;
            list-style: none;
            font-size: 13px;
            color: var(--text-dark-muted);
        }

        .hw-specs li {
            display: flex;
            justify-content: space-between;
            margin-bottom: 6px;
        }

        .hw-specs li:last-child {
            margin-bottom: 0;
        }

        .hw-btn {
            margin-top: auto;
            display: inline-block;
            text-align: center;
            padding: 10px;
            border-radius: 6px;
            background: #0f172a;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
        }

        .hw-btn:hover {
            background: var(--primary);
        }

        /* 板块 5: 核心算法与高能理念 (深邃碳黑) */
        .dark-tech-section {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-dim);
            border-bottom: 1px solid var(--border-dim);
            position: relative;
        }

        .dark-tech-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(16, 185, 129, 0.05) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }

        .tech-steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            z-index: 1;
        }

        .tech-step-item {
            background: rgba(22, 27, 34, 0.7);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(4px);
        }

        .tech-step-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 12px;
            opacity: 0.8;
        }

        .tech-step-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .tech-step-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 板块 6: 场景案例网格 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .case-media {
            height: 190px;
            overflow: hidden;
        }

        .case-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

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

        .case-tag {
            color: var(--primary-glow);
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: block;
        }

        .case-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

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

        /* 板块 7: 效能指标统计横条 */
        .metric-bar-section {
            background: linear-gradient(90deg, #10B981 0%, #059669 100%);
            color: #fff;
            padding: 50px 0;
        }

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

        .metric-num {
            font-size: 44px;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 15px;
            font-weight: 500;
            opacity: 0.9;
        }

        /* 板块 8: 专家教练评价墙 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testi-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testi-quote {
            font-size: 14px;
            color: #cbd5e1;
            line-height: 1.75;
            margin-bottom: 20px;
            position: relative;
        }

        .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-dim);
            padding-top: 16px;
        }

        .testi-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #334155;
            display: grid;
            place-items: center;
            font-weight: 700;
            color: var(--primary-glow);
        }

        .testi-meta h4 {
            font-size: 15px;
            font-weight: 600;
        }

        .testi-meta p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 板块 9: 行业资讯与科研摘要 */
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .insight-media {
            height: 180px;
            overflow: hidden;
        }

        .insight-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        .insight-body {
            padding: 24px;
            flex: 1;
        }

        .insight-date {
            font-size: 12px;
            color: var(--text-dark-muted);
            margin-bottom: 6px;
            display: block;
        }

        .insight-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .insight-desc {
            font-size: 14px;
            color: var(--text-dark-muted);
            line-height: 1.6;
        }

        /* 板块 10: FAQ 手风琴 */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

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

        .faq-icon {
            fontsize: 20px;
            transition: transform 0.3s ease;
            color: var(--primary-glow);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            background: rgba(9, 13, 18, 0.4);
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 24px 20px;
        }

        /* 板块 11: 部署与服务保障条 */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .trust-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }

        .trust-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary-glow);
            display: grid;
            place-items: center;
            font-size: 20px;
            font-weight: 700;
        }

        .trust-item h4 {
            font-size: 16px;
            margin-bottom: 8px;
        }

        .trust-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 板块 12: 底部转换与方案表单区 */
        .conversion-section {
            background: radial-gradient(circle at 50% 100%, rgba(16, 185, 129, 0.15) 0%, rgba(13, 17, 23, 0) 80%),
                        var(--bg-darker);
            border-top: 1px solid var(--border-dim);
        }

        .conversion-box {
            max-width: 860px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid rgba(16, 185, 129, 0.35);
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
        }

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

        /* 页脚规范与合规信标 */
        .site-footer {
            background: #06090D;
            border-top: 1px solid var(--border-dim);
            padding: 70px 0 30px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-col h5 {
            color: var(--text-pure);
            font-size: 16px;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a:hover {
            color: var(--primary-glow);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-dim);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }

        .footer-bottom a:hover {
            color: var(--text-pure);
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-grid,
            .arch-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .features-grid,
            .hardware-grid,
            .cases-grid,
            .insights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .tech-steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-utility-bar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #0D1117;
                border-bottom: 1px solid var(--border-dim);
                flex-direction: column;
                padding: 20px 24px;
                gap: 16px;
                display: none;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .hero-title {
                font-size: 32px;
            }
            .section-title {
                font-size: 26px;
            }
            .features-grid,
            .hardware-grid,
            .cases-grid,
            .insights-grid,
            .testimonials-grid,
            .trust-grid {
                grid-template-columns: 1fr;
            }
            .tech-steps-grid {
                grid-template-columns: 1fr;
            }
            .metrics-wrapper {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .form-row-2 {
                grid-template-columns: 1fr;
            }
            .conversion-box {
                padding: 28px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 28px;
            }
            .metric-num {
                font-size: 34px;
            }
        }