/* roulang page: index */
:root {
            --bg-clean: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #0B0F17;
            --bg-dark-card: #131A26;
            --primary: #0284C7;
            --primary-hover: #0369A1;
            --accent-amber: #D97706;
            --accent-cyan: #00D2B4;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: rgba(226, 232, 240, 0.9);
            --border-dark: rgba(255, 255, 255, 0.08);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.03);
            --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 36px -4px rgba(15, 23, 42, 0.1);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-full: 9999px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

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

        body {
            font-family: var(--font-family);
            background-color: var(--bg-clean);
            color: var(--text-body);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.2s ease;
        }

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

        button, input, select, textarea {
            font-family: inherit;
        }

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

        /* 顶部公告与体系认证条 */
        .topbar {
            background-color: var(--bg-dark);
            color: #94A3B8;
            font-size: 12px;
            border-bottom: 1px solid var(--border-dark);
            padding: 8px 0;
        }
        .topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .topbar-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--accent-cyan);
            box-shadow: 0 0 8px var(--accent-cyan);
        }
        .topbar-info {
            display: flex;
            gap: 20px;
        }

        /* 主粘性导航 */
        .navbar {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .navbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.01em;
        }
        .brand-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 15px;
            font-weight: 900;
        }
        .nav-menu {
            display: flex;
            gap: 28px;
            list-style: none;
            align-items: center;
        }
        .nav-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-body);
            position: relative;
            padding: 8px 0;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            text-align: center;
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFF;
            box-shadow: 0 2px 8px rgba(2, 132, 199, 0.24);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-1px);
        }
        .btn-outline {
            background-color: transparent;
            border-color: #CBD5E1;
            color: var(--text-heading);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: #F0F9FF;
        }
        .btn-amber {
            background-color: var(--accent-amber);
            color: #FFF;
        }
        .btn-amber:hover {
            background-color: #B45309;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-heading);
        }

        /* 基础板块设定 */
        section {
            padding: 96px 0;
            position: relative;
            scroll-margin-top: 72px;
        }
        .section-header {
            max-width: 780px;
            margin: 0 auto 64px auto;
            text-align: center;
        }
        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: #E0F2FE;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-heading);
            letter-spacing: -0.02em;
            line-height: 1.28;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 板块 1: Hero 全宽视频/工业展台背景 */
        .hero-section {
            background: linear-gradient(180deg, #070B12 0%, #0F172A 100%);
            color: #FFF;
            padding: 110px 0 90px 0;
            position: relative;
            overflow: hidden;
        }
        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/af4b1916aba940f6.png');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
            mix-blend-mode: luminosity;
        }
        .hero-glow {
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translateX(-50%);
            width: 800px;
            height: 380px;
            background: radial-gradient(circle, rgba(2, 132, 199, 0.25) 0%, rgba(0, 210, 180, 0.05) 50%, transparent 70%);
            filter: blur(50px);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }
        .hero-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            color: var(--accent-cyan);
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.025em;
            margin-bottom: 24px;
            color: #F8FAFC;
        }
        .hero-subtitle {
            font-size: 17px;
            line-height: 1.75;
            color: #CBD5E1;
            margin-bottom: 36px;
            max-width: 820px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 56px;
            flex-wrap: wrap;
        }
        .hero-video-trigger {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #FFF;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .hero-video-trigger:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .play-icon-ring {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
        }
        .hero-proof-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: left;
        }
        .proof-item-title {
            font-size: 12px;
            color: #94A3B8;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 4px;
        }
        .proof-item-val {
            font-size: 17px;
            font-weight: 700;
            color: #FFF;
        }

        /* 板块 2: 问题陈述与行业制造瓶颈 */
        .challenges-section {
            background-color: #FFFFFF;
        }
        .challenges-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .challenge-card {
            background: #F8FAFC;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            position: relative;
            transition: all 0.25s ease;
        }
        .challenge-card:hover {
            border-color: #CBD5E1;
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .challenge-number {
            font-size: 12px;
            font-weight: 700;
            color: var(--accent-amber);
            background: rgba(217, 119, 6, 0.1);
            padding: 3px 8px;
            border-radius: var(--radius-sm);
            display: inline-block;
            margin-bottom: 16px;
        }
        .challenge-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .challenge-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* 板块 3: 操作演示与洁净室制造流向 */
        .demo-section {
            background-color: #F1F5F9;
        }
        .demo-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .demo-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
        }
        .demo-visual img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }
        .demo-overlay-tag {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(8px);
            padding: 16px;
            border-radius: var(--radius-sm);
            color: #FFF;
            font-size: 13px;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .timeline-steps {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .timeline-step {
            display: flex;
            gap: 16px;
            background: #FFF;
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
        }
        .step-index {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            background: #E0F2FE;
            color: var(--primary);
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
        }
        .step-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 6px;
        }
        .step-info p {
            font-size: 13.5px;
            color: var(--text-body);
            line-height: 1.6;
        }

        /* 板块 4: 全栈解决方案 */
        .solutions-section {
            background-color: #FFFFFF;
        }
        .solutions-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }
        .solutions-specs-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 28px;
        }
        .spec-item {
            background: #F8FAFC;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 16px;
        }
        .spec-item-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .spec-item-val {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-heading);
        }

        /* 板块 5: 结果预览与制程规格矩阵 */
        .results-section {
            background-color: #F8FAFC;
        }
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .product-card {
            background: #FFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
        }
        .product-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: #CBD5E1;
        }
        .product-card-img {
            height: 190px;
            width: 100%;
            object-fit: cover;
            border-bottom: 1px solid var(--border-light);
        }
        .product-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .product-node-badge {
            align-self: flex-start;
            font-size: 11px;
            font-weight: 700;
            color: var(--primary);
            background: #E0F2FE;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
        }
        .product-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .product-desc {
            font-size: 13.5px;
            color: var(--text-body);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .product-spec-kv {
            list-style: none;
            font-size: 12.5px;
            border-top: 1px dashed var(--border-light);
            padding-top: 14px;
            margin-top: auto;
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .product-spec-kv li {
            display: flex;
            justify-content: space-between;
            color: var(--text-muted);
        }
        .product-spec-kv li span {
            color: var(--text-heading);
            font-weight: 600;
        }

        /* 板块 6: 制造优势六维矩阵 */
        .advantages-section {
            background-color: #FFFFFF;
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .advantage-bento-card {
            border: 1px solid var(--border-light);
            background: #FFF;
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            transition: all 0.25s ease;
        }
        .advantage-bento-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .adv-index {
            font-size: 13px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.05em;
            margin-bottom: 12px;
        }
        .adv-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
        }
        .adv-desc {
            font-size: 13.5px;
            color: var(--text-body);
            line-height: 1.65;
        }

        /* 板块 7: 常见卡住点与工艺瓶颈攻坚 */
        .bottlenecks-section {
            background-color: #F8FAFC;
        }
        .bottlenecks-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .bottleneck-box {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
        }
        .bottleneck-pill {
            font-size: 11px;
            font-weight: 700;
            color: #DC2626;
            background: #FEE2E2;
            padding: 3px 8px;
            border-radius: var(--radius-sm);
            display: inline-block;
            margin-bottom: 12px;
        }
        .bottleneck-heading {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
        }
        .bottleneck-desc {
            font-size: 13.5px;
            color: var(--text-body);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .solution-tag-link {
            font-size: 12px;
            color: var(--primary);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* 板块 8: 极端制造理念深色对比区 */
        .dark-concept-section {
            background-color: var(--bg-dark);
            color: #FFF;
            padding: 96px 0;
            position: relative;
        }
        .dark-concept-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .dark-card-panel {
            background: var(--bg-dark-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 32px;
        }
        .dark-metric-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 24px;
        }
        .dark-metric-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding-bottom: 14px;
        }
        .dark-metric-name {
            font-size: 14px;
            color: #94A3B8;
        }
        .dark-metric-val {
            font-size: 16px;
            font-weight: 700;
            color: var(--accent-cyan);
        }

        /* 板块 9: 典型场景实录与成功路径 */
        .stories-section {
            background-color: #FFFFFF;
        }
        .stories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .story-card {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            background: #FFF;
            transition: all 0.25s ease;
        }
        .story-card:hover {
            box-shadow: var(--shadow-md);
            border-color: #CBD5E1;
        }
        .story-category {
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .story-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .story-body {
            font-size: 13.5px;
            color: var(--text-body);
            line-height: 1.65;
            margin-bottom: 16px;
        }
        .story-outcome {
            background: #F8FAFC;
            border-left: 3px solid var(--accent-cyan);
            padding: 10px 12px;
            font-size: 12.5px;
            color: var(--text-heading);
            font-weight: 600;
        }

        /* 板块 10: 成果数据指标条 */
        .metrics-section {
            background-color: #0F172A;
            color: #FFF;
            padding: 64px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .metric-card-stat {
            padding: 16px;
        }
        .metric-big-num {
            font-size: 40px;
            font-weight: 800;
            color: #F8FAFC;
            letter-spacing: -0.03em;
            margin-bottom: 6px;
            line-height: 1.1;
        }
        .metric-big-num span {
            color: var(--primary);
            font-size: 26px;
        }
        .metric-stat-label {
            font-size: 14px;
            color: #94A3B8;
        }

        /* 板块 11: 客户证言与评价墙 */
        .testimonials-section {
            background-color: #F8FAFC;
        }
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: #FFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .testimonial-quote {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 20px;
            position: relative;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }
        .author-avatar-ph {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--text-heading);
            font-size: 14px;
        }
        .author-meta-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-heading);
        }
        .author-meta-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 板块 12: 资讯与工艺研报摘要 */
        .news-section {
            background-color: #FFFFFF;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #FFF;
            transition: all 0.25s ease;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
        }
        .news-card-thumb {
            height: 160px;
            width: 100%;
            object-fit: cover;
        }
        .news-content-box {
            padding: 20px;
        }
        .news-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            justify-content: space-between;
        }
        .news-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-excerpt {
            font-size: 13px;
            color: var(--text-body);
            line-height: 1.6;
            margin-bottom: 14px;
        }Focusing on extending the CSS, the next element to style appears to be `.news-excerpt`. Considering appropriate font size, color, and line height is essential for readability and visual appeal within the news section. The goal is a consistent and user-friendly presentation.


    <style>
        .news-excerpt {
            font-size: 14px;
            color: #333;
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .news-excerpt a {
            color: #007bff;
            text-decoration: none;
        }
        .news-excerpt a:hover {
            text-decoration: underline;
        }

.news-excerpt {
            font-size: 14px;
            color: #333;
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .news-excerpt a {
            color: #007bff;
            text-decoration: none;
        }
        .news-excerpt a:hover {
            text-decoration: underline;
        }