/* roulang page: index */
:root {
            --brand-green-start: #0F5B46;
            --brand-green-end: #1B7F63;
            --brand-dark: #0B2520;
            --brand-orange: #F07842;
            --brand-orange-hover: #D9622E;
            --bg-light: #F8F9FA;
            --bg-card: #FFFFFF;
            --text-main: #2C3E50;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --shadow-subtle: 0 4px 20px -2px rgba(15, 91, 70, 0.06);
            --shadow-float: 0 12px 30px -4px rgba(15, 91, 70, 0.12);
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
        }

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

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

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

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部通知与服务栏 */
        .top-utility-bar {
            background-color: var(--brand-dark);
            color: #94A3B8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .top-utility-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-service-time {
            display: flex;
            gap: 16px;
        }
        .top-service-link {
            color: #CBD5E1;
        }
        .top-service-link:hover {
            color: #FFFFFF;
        }

        /* 主导航条 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--brand-green-start);
            letter-spacing: -0.5px;
        }
        .brand-logo svg {
            width: 32px;
            height: 32px;
            fill: var(--brand-green-start);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: #475569;
            padding: 6px 4px;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--brand-green-start);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-orange-hover) 100%);
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(240, 120, 66, 0.3);
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(240, 120, 66, 0.4);
        }

        /* 徽章与通用小组件 */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
        }
        .badge-green {
            background-color: #ECFDF5;
            color: #065F46;
            border: 1px solid #A7F3D0;
        }
        .badge-orange {
            background-color: #FFF7ED;
            color: #C2410C;
            border: 1px solid #FFEDD5;
        }
        .badge-dark {
            background-color: rgba(255, 255, 255, 0.12);
            color: #34D399;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* 工业参数首屏 Hero */
        .hero-section {
            padding: 40px 0 60px;
            background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F3 100%);
            border-bottom: 1px solid #E2E8F0;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 40px;
            align-items: center;
        }
        .hero-title {
            font-size: 40px;
            line-height: 1.25;
            font-weight: 800;
            color: #0F172A;
            margin: 16px 0 20px;
            letter-spacing: -0.5px;
        }
        .hero-lead {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 36px;
            align-items: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--brand-green-start) 0%, var(--brand-green-end) 100%);
            color: #FFFFFF;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(15, 91, 70, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(15, 91, 70, 0.35);
        }
        .btn-secondary {
            background-color: #FFFFFF;
            border: 1px solid #CBD5E1;
            color: #334155;
            padding: 14px 26px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
        }
        .btn-secondary:hover {
            background-color: #F8FAFC;
            border-color: #94A3B8;
        }
        /* 工业核心参数带 */
        .hero-param-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            background: #FFFFFF;
            padding: 16px;
            border-radius: var(--radius-lg);
            border: 1px solid #E2E8F0;
            box-shadow: var(--shadow-subtle);
        }
        .param-item {
            border-right: 1px solid #F1F5F9;
            padding: 4px 12px;
        }
        .param-item:last-child {
            border-right: none;
        }
        .param-val {
            font-size: 22px;
            font-weight: 800;
            color: var(--brand-green-start);
            line-height: 1.2;
        }
        .param-label {
            font-size: 12px;
            color: #64748B;
            margin-top: 4px;
        }
        .hero-media-wrapper {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(15, 91, 70, 0.15);
            border: 4px solid #FFFFFF;
            background: #000;
        }
        .hero-media-wrapper img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
        }
        .hero-floating-card {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            padding: 16px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }

        /* 通用板块头部 */
        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 48px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: #0F172A;
            margin: 12px 0 16px;
            letter-spacing: -0.5px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 统一 Section 间距 */
        .content-section {
            padding: 72px 0;
            border-bottom: 1px solid #ECEFF2;
        }
        .bg-white { background-color: #FFFFFF; }
        .bg-muted { background-color: #F8F9FA; }
        .bg-dark-mesh {
            background-color: var(--brand-dark);
            color: #FFFFFF;
        }

        /* 板块二：品类入口 */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .category-card {
            background: #FFFFFF;
            padding: 28px 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .category-card:hover {
            transform: translateY(-4px);
            border-color: var(--brand-green-end);
            box-shadow: var(--shadow-float);
        }
        .cat-icon-box {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: #ECFDF5;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            color: var(--brand-green-start);
            font-size: 22px;
            font-weight: bold;
        }
        .category-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: #0F172A;
            margin-bottom: 8px;
        }
        .category-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .category-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-green-start);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 板块三：系统核心矩阵 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-subtle);
            transition: all 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-float);
            border-color: #99F6E4;
        }
        .feature-top {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: #1E293B;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 板块四：附近宿集推荐实操展示 */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .showcase-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }
        .showcase-card:hover {
            box-shadow: var(--shadow-float);
        }
        .showcase-img-box {
            height: 200px;
            position: relative;
            overflow: hidden;
        }
        .showcase-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .showcase-card:hover .showcase-img-box img {
            transform: scale(1.05);
        }
        .showcase-body {
            padding: 24px;
        }
        .showcase-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--brand-orange);
            margin-bottom: 6px;
            display: block;
        }
        .showcase-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .showcase-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .showcase-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid #F1F5F9;
            padding-top: 12px;
            font-size: 13px;
            color: #64748B;
        }

        /* 板块五：口碑榜（多维用户评测） */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: #FFFFFF;
            padding: 28px;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-subtle);
        }
        .testimonial-stars {
            color: #F59E0B;
            font-size: 16px;
            margin-bottom: 12px;
        }
        .testimonial-text {
            font-size: 14px;
            color: #334155;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--brand-green-start);
            font-size: 16px;
        }
        .author-info h4 {
            font-size: 14px;
            font-weight: 700;
            color: #0F172A;
        }
        .author-info span {
            font-size: 12px;
            color: #64748B;
        }

        /* 板块六：底层技术架构区 (深色) */
        .bg-dark-mesh .section-header h2 {
            color: #FFFFFF;
        }
        .bg-dark-mesh .section-header p {
            color: #94A3B8;
        }
        .tech-arch-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .arch-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 24px;
        }
        .arch-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: #34D399;
            margin-bottom: 10px;
        }
        .arch-card p {
            font-size: 13px;
            color: #CBD5E1;
            line-height: 1.6;
        }

        /* 板块七：保障承诺条 */
        .guarantee-bar-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .guarantee-item {
            text-align: center;
            padding: 24px 16px;
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .guarantee-icon {
            font-size: 28px;
            margin-bottom: 12px;
            color: var(--brand-green-start);
        }
        .guarantee-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .guarantee-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 板块八：上线与到店实施流程 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .step-card {
            background: #FFFFFF;
            padding: 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            position: relative;
        }
        .step-number {
            font-size: 32px;
            font-weight: 800;
            color: #CBD5E1;
            line-height: 1;
            margin-bottom: 12px;
        }
        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #1E293B;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 板块九：行业资讯与经营干货 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .news-img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        .news-body {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .news-meta-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #94A3B8;
            margin-bottom: 10px;
        }
        .news-body h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.45;
            color: #0F172A;
            margin-bottom: 8px;
        }
        .news-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        /* 板块十：常见问答手风琴 */
        .faq-accordion-box {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 700;
            color: #1E293B;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--brand-green-start);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 板块十一：版本对比矩阵 */
        .edition-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .edition-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            padding: 36px 28px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
        }
        .edition-featured {
            border: 2px solid var(--brand-green-start);
            box-shadow: 0 16px 36px rgba(15, 91, 70, 0.12);
            transform: scale(1.02);
        }
        .popular-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--brand-orange);
            color: #FFFFFF;
            padding: 4px 16px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
        }
        .edition-card h3 {
            font-size: 20px;
            font-weight: 800;
            color: #0F172A;
            margin-bottom: 6px;
        }
        .edition-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .edition-list {
            list-style: none;
            margin-bottom: 28px;
        }
        .edition-list li {
            font-size: 14px;
            color: #334155;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .edition-list li::before {
            content: "✓";
            color: var(--brand-green-start);
            font-weight: 900;
        }

        /* 板块十二：预约演示与转化收口 (全页唯一收口) */
        .cta-box {
            background: linear-gradient(135deg, var(--brand-green-start) 0%, var(--brand-dark) 100%);
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            color: #FFFFFF;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }
        .cta-content h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .cta-content p {
            font-size: 15px;
            color: #CBD5E1;
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .cta-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .cta-form-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 28px;
            color: var(--text-main);
            box-shadow: 0 10px 30px rgba(0,0,0,0.25);
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: #334155;
            margin-bottom: 6px;
        }
        .form-input {
            width: 100%;
            padding: 12px 14px;
            border-radius: 8px;
            border: 1px solid #CBD5E1;
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s ease;
        }
        .form-input:focus {
            border-color: var(--brand-green-start);
            box-shadow: 0 0 0 3px rgba(15, 91, 70, 0.1);
        }
        .btn-submit {
            width: 100%;
            background: linear-gradient(135deg, var(--brand-orange) 0%, var(--brand-orange-hover) 100%);
            color: #FFFFFF;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(240, 120, 66, 0.35);
        }
        .btn-submit:hover {
            opacity: 0.95;
            transform: translateY(-1px);
        }

        /* 统一页脚 */
        .site-footer {
            background-color: #071915;
            color: #94A3B8;
            padding: 64px 0 24px;
            font-size: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
            display: inline-block;
        }
        .footer-brief {
            line-height: 1.7;
            margin-bottom: 16px;
            color: #64748B;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #F8FAFC;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: #34D399;
        }
        .footer-contact-item {
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #475569;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-bottom a {
            color: #64748B;
        }
        .footer-bottom a:hover {
            color: #CBD5E1;
        }

        /* 移动端汉堡与响应式适配 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: #0F172A;
        }

        @media (max-width: 1024px) {
            .category-grid, .guarantee-bar-grid, .process-flow, .tech-arch-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .hero-param-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .edition-card.edition-featured {
                transform: none;
            }
        }

        @media (max-width: 768px) {
            .top-utility-bar {
                display: none;
            }
            .main-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .feature-grid, .showcase-grid, .testimonial-grid, .news-grid, .edition-grid {
                grid-template-columns: 1fr;
            }
            .category-grid, .guarantee-bar-grid, .process-flow, .tech-arch-grid {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 28px;
            }
            .cta-box {
                grid-template-columns: 1fr;
                padding: 32px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }