/* roulang page: index */
:root {
            --c-primary: #1D3A2F;
            --c-primary-deep: #0D241C;
            --c-accent: #5EEAD4;
            --c-catalyst: #E29578;
            --c-text-main: #1E293B;
            --c-text-muted: #64748B;
            --c-bg-light: #F7F9F8;
            --c-bg-card: #FFFFFF;
            --c-border: rgba(29, 58, 47, 0.12);
            --c-border-subtle: #E2E8F0;
            --shadow-subtle: 0 4px 20px -2px rgba(13, 36, 28, 0.05);
            --shadow-hover: 0 10px 25px -4px rgba(13, 36, 28, 0.12);
            --radius-sm: 4px;
            --radius-md: 6px;
            --trans-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
        }

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

        body {
            font-family: var(--font-family);
            background-color: var(--c-bg-light);
            color: var(--c-text-main);
            line-height: 1.7;
            overflow-x: hidden;
        }

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

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通栏与主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--c-border);
        }

        .top-bar {
            background-color: var(--c-primary-deep);
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

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

        .top-bar-meta {
            display: flex;
            gap: 24px;
        }

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

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

        .brand-logo-badge {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 900;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 32px;
            align-items: center;
        }

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

        .nav-item a:hover {
            color: var(--c-primary);
        }

        .nav-item a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--c-primary);
            transition: var(--trans-smooth);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 24px;
            font-size: 0.9375rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--trans-smooth);
            border: 1px solid transparent;
            min-height: 44px;
        }

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

        .btn-primary:hover {
            background-color: var(--c-primary-deep);
            box-shadow: 0 4px 12px rgba(29, 58, 47, 0.25);
            transform: translateY(-1px);
        }

        .btn-accent {
            background-color: var(--c-accent);
            color: var(--c-primary-deep);
        }

        .btn-accent:hover {
            background-color: #4cd4bf;
            box-shadow: 0 4px 12px rgba(94, 234, 212, 0.3);
            transform: translateY(-1px);
        }

        .btn-outline {
            border-color: rgba(255, 255, 255, 0.4);
            color: #FFFFFF;
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-outline:hover {
            border-color: #FFFFFF;
            background: rgba(255, 255, 255, 0.15);
        }

        /* 结构化板块共通 */
        section {
            padding: 96px 0;
            position: relative;
        }

        .section-header {
            margin-bottom: 56px;
            max-width: 760px;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: var(--c-primary);
            text-transform: uppercase;
            margin-bottom: 12px;
            padding: 4px 10px;
            background: rgba(29, 58, 47, 0.06);
            border-radius: 2px;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--c-primary-deep);
            line-height: 1.25;
            letter-spacing: -0.015em;
            margin-bottom: 16px;
        }

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

        /* 板块一：首屏 Hero */
        .hero-section {
            background: linear-gradient(rgba(13, 36, 28, 0.88), rgba(13, 36, 28, 0.92)), url('/assets/images/6ccf0f6db79631c0.jpg') center/cover no-repeat;
            color: #FFFFFF;
            padding: 120px 0 110px 0;
            position: relative;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 56px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 3.25rem;
            font-weight: 800;
            line-height: 1.18;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        .hero-lead {
            font-size: 1.125rem;
            line-height: 1.8;
            color: #E2E8F0;
            margin-bottom: 36px;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
        }

        .hero-metrics-strip {
            display: flex;
            gap: 36px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .hero-stat-item .num {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--c-accent);
            display: block;
            line-height: 1.1;
        }

        .hero-stat-item .label {
            font-size: 0.8125rem;
            color: #94A3B8;
        }

        .hero-board-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(16px);
            padding: 32px;
            border-radius: var(--radius-md);
        }

        .board-tag {
            font-size: 0.75rem;
            background: rgba(94, 234, 212, 0.15);
            color: var(--c-accent);
            padding: 4px 8px;
            border-radius: 2px;
            display: inline-block;
            margin-bottom: 16px;
        }

        .board-item {
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .board-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .board-item h4 {
            font-size: 1rem;
            color: #FFFFFF;
            margin-bottom: 6px;
        }

        .board-item p {
            font-size: 0.875rem;
            color: #CBD5E1;
        }

        /* 板块二：核心痛点与转化卖点 */
        .pain-points-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .pain-card {
            background: var(--c-bg-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 36px 30px;
            transition: var(--trans-smooth);
            position: relative;
        }

        .pain-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--c-primary);
        }

        .pain-card .idx {
            font-size: 1.75rem;
            font-weight: 800;
            color: rgba(29, 58, 47, 0.2);
            margin-bottom: 16px;
            display: block;
        }

        .pain-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--c-primary-deep);
            margin-bottom: 12px;
        }

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

        /* 板块三：转化场景 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scenario-item {
            background: var(--c-bg-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--trans-smooth);
        }

        .scenario-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

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

        .scenario-body {
            padding: 24px;
        }

        .scenario-body h4 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--c-primary-deep);
            margin-bottom: 10px;
        }

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

        /* 板块四：转化管线 */
        .process-bg {
            background-color: #FFFFFF;
            border-top: 1px solid var(--c-border-subtle);
            border-bottom: 1px solid var(--c-border-subtle);
        }

        .process-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            margin-top: 40px;
        }

        .process-timeline::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 5%;
            width: 90%;
            height: 2px;
            background: var(--c-border-subtle);
            z-index: 1;
        }

        .step-node {
            position: relative;
            z-index: 2;
            background: #FFFFFF;
            padding: 0 12px;
        }

        .step-marker {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--c-bg-light);
            border: 2px solid var(--c-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--c-primary);
            margin-bottom: 20px;
        }

        .step-node h4 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--c-primary-deep);
            margin-bottom: 8px;
        }

        .step-badge {
            display: inline-block;
            font-size: 0.75rem;
            color: var(--c-primary);
            background: rgba(29, 58, 47, 0.08);
            padding: 2px 8px;
            border-radius: 2px;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .step-node p {
            font-size: 0.875rem;
            color: var(--c-text-muted);
            line-height: 1.6;
        }

        /* 板块五：核心技术服务网格 3x2 */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .adv-card {
            background: var(--c-bg-card);
            border: 1px solid var(--c-border);
            padding: 32px;
            border-radius: var(--radius-md);
            transition: var(--trans-smooth);
        }

        .adv-card:hover {
            border-color: var(--c-primary);
            box-shadow: var(--shadow-hover);
        }

        .adv-card h4 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--c-primary-deep);
            margin-bottom: 12px;
        }

        .adv-card p {
            font-size: 0.9375rem;
            color: var(--c-text-muted);
        }

        /* 板块六：精选高价值项目专区 */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .project-card {
            background: #FFFFFF;
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .proj-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
        }

        .proj-trl {
            background: var(--c-primary-deep);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 8px;
            border-radius: 2px;
        }

        .project-card h4 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--c-primary-deep);
            margin-bottom: 12px;
        }

        .project-card p {
            font-size: 0.9375rem;
            color: var(--c-text-muted);
            margin-bottom: 20px;
        }

        .proj-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            border-top: 1px solid var(--c-border-subtle);
            padding-top: 16px;
        }

        .proj-tag-item {
            font-size: 0.8125rem;
            background: var(--c-bg-light);
            color: var(--c-text-main);
            padding: 4px 10px;
            border-radius: 2px;
        }

        /* 板块七：深色理念区 */
        .vision-dark-section {
            background-color: var(--c-primary-deep);
            color: #FFFFFF;
            padding: 110px 0;
        }

        .vision-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .vision-text h2 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
        }

        .vision-text p {
            font-size: 1.0625rem;
            color: #CBD5E1;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .poc-framework-box {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 36px;
            border-radius: var(--radius-md);
        }

        .poc-framework-box h4 {
            font-size: 1.25rem;
            color: var(--c-accent);
            margin-bottom: 16px;
        }

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

        .poc-list li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 14px;
            font-size: 0.9375rem;
            color: #E2E8F0;
        }

        .poc-list li::before {
            content: "•";
            position: absolute;
            left: 0;
            color: var(--c-accent);
            font-size: 1.2rem;
            line-height: 1;
        }

        /* 板块八：故事案例 */
        .story-wrapper {
            background: #FFFFFF;
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1.2fr;
        }

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

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

        .story-content h3 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--c-primary-deep);
            margin-bottom: 16px;
            line-height: 1.3;
        }

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

        .story-stats {
            display: flex;
            gap: 40px;
            border-top: 1px solid var(--c-border-subtle);
            padding-top: 24px;
        }

        .story-stat-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--c-primary);
        }

        .story-stat-lbl {
            font-size: 0.8125rem;
            color: var(--c-text-muted);
        }

        /* 板块九：关键数据效能条 */
        .metrics-bar-section {
            background: #FFFFFF;
            border-top: 1px solid var(--c-border-subtle);
            border-bottom: 1px solid var(--c-border-subtle);
            padding: 64px 0;
        }

        .metrics-strip-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .metric-unit-val {
            font-size: 2.75rem;
            font-weight: 800;
            color: var(--c-primary-deep);
            line-height: 1.1;
            margin-bottom: 8px;
            font-family: inherit;
        }

        .metric-unit-val span {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--c-catalyst);
            margin-left: 4px;
        }

        .metric-desc-txt {
            font-size: 0.875rem;
            color: var(--c-text-muted);
        }

        /* 板块十：多方评价 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .review-card {
            background: #FFFFFF;
            border: 1px solid var(--c-border);
            padding: 32px;
            border-radius: var(--radius-md);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-card blockquote {
            font-size: 0.9375rem;
            color: var(--c-text-main);
            margin-bottom: 24px;
            line-height: 1.7;
            font-style: normal;
        }

        .reviewer-info {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--c-border-subtle);
            padding-top: 16px;
        }

        .reviewer-role h5 {
            font-size: 0.9375rem;
            color: var(--c-primary-deep);
        }

        .reviewer-role p {
            font-size: 0.8125rem;
            color: var(--c-text-muted);
        }

        /* 板块十一：动态资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

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

        .news-body h4 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--c-primary-deep);
            margin-bottom: 10px;
        }

        .news-body p {
            font-size: 0.875rem;
            color: var(--c-text-muted);
            margin-bottom: 16px;
        }

        .news-date {
            font-size: 0.75rem;
            color: var(--c-text-muted);
        }

        /* 板块十二：FAQ */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--c-border);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 1.0625rem;
            font-weight: 600;
            color: var(--c-primary-deep);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-icon {
            font-weight: 400;
            font-size: 1.25rem;
            color: var(--c-primary);
            transition: var(--trans-smooth);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
            padding: 0 24px;
            background: #FCFDFD;
            color: var(--c-text-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            padding-bottom: 24px;
        }

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

        /* 板块十三：底线保障与终极登记收口 */
        .guarantee-box {
            background: var(--c-primary-deep);
            color: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 56px 48px;
        }

        .guarantee-bar {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            padding-bottom: 48px;
            margin-bottom: 48px;
        }

        .g-item h4 {
            font-size: 1.125rem;
            color: var(--c-accent);
            margin-bottom: 10px;
        }

        .g-item p {
            font-size: 0.875rem;
            color: #CBD5E1;
        }

        .docking-form-wrapper {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .docking-form-wrapper h3 {
            font-size: 1.75rem;
            margin-bottom: 12px;
        }

        .docking-form-wrapper p {
            color: #CBD5E1;
            font-size: 0.9375rem;
            margin-bottom: 32px;
        }

        .dual-channel-form {
            display: grid;
            grid-template-columns: repeat(2, 1fr) 1.2fr auto;
            gap: 16px;
            text-align: left;
        }

        .form-input, .form-select {
            width: 100%;
            height: 48px;
            padding: 0 16px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-sm);
            color: #FFFFFF;
            font-size: 0.9375rem;
            outline: none;
            transition: var(--trans-smooth);
        }

        .form-input:focus, .form-select:focus {
            border-color: var(--c-accent);
            background: rgba(255, 255, 255, 0.14);
        }

        .form-select option {
            background-color: var(--c-primary-deep);
            color: #FFFFFF;
        }

        /* 移动端浮动操作条 */
        .mobile-fixed-action-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 12px 16px;
            border-top: 1px solid var(--c-border);
            z-index: 999;
            box-shadow: 0 -4px 16px rgba(0,0,0,0.06);
        }

        .mobile-action-btns {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        /* 页脚 */
        .site-footer {
            background-color: #071510;
            color: #94A3B8;
            font-size: 0.875rem;
            padding: 72px 0 32px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 56px;
        }

        .footer-brand-title {
            color: #FFFFFF;
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-col h5 {
            color: #FFFFFF;
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8125rem;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .projects-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .vision-grid {
                grid-template-columns: 1fr;
            }
            .dual-channel-form {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .nav-menu {
                display: none;
            }
            .mobile-fixed-action-bar {
                display: block;
            }
            body {
                padding-bottom: 68px;
            }
            .hero-content h1 {
                font-size: 2.25rem;
            }
            .pain-points-grid, .projects-grid, .advantage-grid, .reviews-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .process-timeline {
                grid-template-columns: 1fr;
            }
            .process-timeline::before {
                display: none;
            }
            .story-wrapper {
                grid-template-columns: 1fr;
            }
            .metrics-strip-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-bar {
                grid-template-columns: 1fr;
            }
            .dual-channel-form {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }