/* roulang page: index */
:root {
            --primary: #1A1A1A;
            --accent: #FF5E1E;
            --secondary: #635BFF;
            --surface-light: #F7F8FA;
            --card-surface: #FFFFFF;
            --surface-dark: #0F1115;
            --border-light: #E5E7EB;
            --border-dark: #22272E;
            --text-heading: #0B0F19;
            --text-body: #475569;
            --text-muted: #94A3B8;
            --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --radius-btn: 6px;
            --radius-card: 10px;
            --shadow-subtle: 0 1px 2px rgba(0,0,0,0.05), 0 8px 24px -4px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 32px -6px rgba(0,0,0,0.12);
            --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

        * { box-sizing: border-box; }
        body {
            font-family: var(--font-family);
            background-color: var(--surface-light);
            color: var(--text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-heading);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

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

        /* 顶部公告条 */
        .top-notice-bar {
            background: linear-gradient(90deg, #121316 0%, #201a18 50%, #121316 100%);
            border-bottom: 1px solid rgba(255, 94, 30, 0.3);
            height: 38px;
            line-height: 38px;
            font-size: 0.8125rem;
            color: #d1d5db;
        }
        .notice-badge {
            background-color: var(--accent);
            color: #fff;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            margin-right: 8px;
        }
        .notice-link {
            color: #ffaa80;
            text-decoration: underline;
            margin-left: 10px;
        }

        /* 主导航栏 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 8px rgba(0,0,0,0.03);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: 75rem;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -0.03em;
        }
        .brand-logo i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 1.5rem;
        }
        .nav-menu a {
            font-size: 0.9375rem;
            font-weight: 600;
            color: #334155;
            position: relative;
            padding: 6px 0;
        }
        .nav-menu a:hover {
            color: var(--accent);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .search-pseudo-box {
            display: flex;
            align-items: center;
            background: #edf0f5;
            border-radius: var(--radius-btn);
            padding: 6px 12px;
            font-size: 0.8125rem;
            color: var(--text-muted);
            border: 1px solid transparent;
        }
        .btn-brand-primary {
            background-color: var(--accent);
            color: #fff;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.875rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(255, 94, 30, 0.3);
        }
        .btn-brand-primary:hover {
            background-color: #e54e12;
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-brand-secondary {
            background-color: #fff;
            color: var(--primary);
            border: 1px solid var(--border-light);
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.875rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-brand-secondary:hover {
            background-color: #f1f5f9;
            color: var(--primary);
        }

        /* 移动端菜单按钮 */
        .mobile-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--primary);
            background: none;
            border: none;
            cursor: pointer;
        }

        /* Section 标准容器与间距 */
        .section-wrap {
            padding: 5.5rem 0;
            position: relative;
        }
        .section-wrap-dark {
            background-color: var(--surface-dark);
            color: #cbd5e1;
            padding: 6rem 0;
        }
        .section-header {
            max-width: 48rem;
            margin: 0 auto 3.5rem auto;
            text-align: center;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent);
            background: rgba(255, 94, 30, 0.08);
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 0.875rem;
        }
        .section-tag-dark {
            background: rgba(255, 94, 30, 0.2);
            color: #ff8855;
        }
        .section-title {
            font-size: 2.25rem;
            margin-bottom: 1rem;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Section 1: Hero Banner 斜切底色与大字号 */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, #101216 0%, #1c202a 60%, #151821 100%);
            color: #fff;
            padding: 5rem 0 6.5rem 0;
            clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
            overflow: hidden;
        }
        .hero-backdrop {
            position: absolute;
            inset: 0;
            opacity: 0.15;
            background-image: url('/assets/images/6550d3bb89811898.jpg');
            background-size: cover;
            background-position: center;
            mix-blend-mode: overlay;
        }
        .hero-content-col {
            position: relative;
            z-index: 2;
        }
        .hero-h1 {
            color: #fff;
            font-size: 3.25rem;
            font-weight: 900;
            margin-bottom: 1.25rem;
            letter-spacing: -0.03em;
            line-height: 1.18;
        }
        .hero-h1 span {
            color: var(--accent);
        }
        .hero-lead-text {
            font-size: 1.125rem;
            color: #94a3b8;
            line-height: 1.8;
            margin-bottom: 2rem;
            max-width: 38rem;
        }
        .hero-stats-badge-row {
            display: flex;
            gap: 1.5rem;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat-item strong {
            display: block;
            font-size: 1.75rem;
            font-weight: 800;
            color: #fff;
        }
        .hero-stat-item span {
            font-size: 0.8125rem;
            color: #64748b;
        }
        .hero-visual-card {
            background: #171b24;
            border: 1px solid #2d3748;
            border-radius: var(--radius-card);
            padding: 1rem;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            position: relative;
            z-index: 2;
        }
        .hero-visual-img {
            border-radius: 6px;
            width: 100%;
            height: auto;
            display: block;
        }
        .hero-floating-pill {
            position: absolute;
            bottom: 1.5rem;
            left: 2rem;
            background: rgba(15, 17, 21, 0.9);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 94, 30, 0.4);
            padding: 8px 16px;
            border-radius: 30px;
            color: #fff;
            font-size: 0.8125rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* Section 2: 行业痛点区 */
        .pain-card {
            background: var(--card-surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 2.25rem 1.75rem;
            height: 100%;
            transition: var(--transition-smooth);
            position: relative;
        }
        .pain-card:hover {
            transform: translateY(-4px);
            border-color: #cbd5e1;
            box-shadow: var(--shadow-hover);
        }
        .pain-tag {
            color: #dc2626;
            background: #fef2f2;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 8px;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 1rem;
        }
        .pain-card h3 {
            font-size: 1.25rem;
            margin-bottom: 0.75rem;
        }

        /* Section 3: 核心解决方案分栏 */
        .spec-list {
            list-style: none;
            padding: 0;
            margin: 1.5rem 0;
        }
        .spec-list li {
            position: relative;
            padding-left: 1.75rem;
            margin-bottom: 0.75rem;
            font-size: 0.95rem;
        }
        .spec-list li i {
            position: absolute;
            left: 0;
            top: 4px;
            color: var(--accent);
        }
        .tech-arch-box {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            box-shadow: var(--shadow-subtle);
        }

        /* Section 4: 6宫格核心优势矩阵 */
        .feature-grid-card {
            background: var(--card-surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 2rem 1.75rem;
            height: 100%;
            position: relative;
            transition: var(--transition-smooth);
        }
        .feature-grid-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
        }
        .feature-num {
            font-family: monospace;
            font-size: 1.125rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 0.5rem;
        }
        .feature-tag-chip {
            background: #eff6ff;
            color: #2563eb;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 2px 6px;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 1rem;
        }

        /* Section 5: 热门工具组件区 */
        .product-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            height: 100%;
            transition: var(--transition-smooth);
        }
        .product-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .product-thumb {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .product-body {
            padding: 1.75rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .product-body h3 {
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
        }

        /* Section 6: 深色工业管线区 */
        .pipeline-step-box {
            background: #171b22;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card);
            padding: 1.75rem;
            margin-bottom: 1.25rem;
        }
        .pipeline-step-box h4 {
            color: #f1f5f9;
            font-size: 1.125rem;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .pipeline-step-box h4 span {
            color: var(--secondary);
            font-size: 0.875rem;
        }

        /* Section 7: 标杆项目与用户故事 */
        .story-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 2rem;
            height: 100%;
            position: relative;
        }
        .story-author {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 1.5rem;
            padding-top: 1.25rem;
            border-top: 1px solid #f1f5f9;
        }
        .studio-badge {
            font-size: 0.75rem;
            color: #64748b;
            background: #f1f5f9;
            padding: 3px 8px;
            border-radius: 4px;
        }

        /* Section 8: 核心效能数据指标条 */
        .metrics-banner {
            background: #15181e;
            border-top: 1px solid #2d3748;
            border-bottom: 1px solid #2d3748;
            padding: 3.5rem 0;
            color: #fff;
        }
        .metric-cell {
            text-align: center;
            padding: 1rem;
        }
        .metric-big-num {
            font-size: 3.25rem;
            font-weight: 900;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .metric-label {
            font-size: 0.9375rem;
            color: #94a3b8;
            font-weight: 600;
        }

        /* Section 9: 适用场景 */
        .audience-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 1.75rem;
            height: 100%;
        }
        .audience-card h3 {
            font-size: 1.2rem;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .audience-card h3 i {
            color: var(--secondary);
        }

        /* Section 10: 资讯内嵌区 */
        .news-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 1.75rem;
            height: 100%;
            transition: var(--transition-smooth);
        }
        .news-card:hover {
            border-color: #cbd5e1;
            box-shadow: var(--shadow-subtle);
        }
        .news-date {
            font-size: 0.8125rem;
            color: #64748b;
            margin-bottom: 0.5rem;
            display: block;
        }

        /* Section 11: FAQ 手风琴 */
        .accordion-title {
            font-weight: 700;
            color: var(--primary) !important;
            font-size: 1.05rem;
            padding: 1.25rem;
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            margin-bottom: 0.5rem;
            transition: var(--transition-smooth);
        }
        .accordion-title:hover {
            background: #fafafa;
        }
        .accordion-content {
            border: 1px solid var(--border-light);
            border-top: none;
            background: #fff;
            padding: 1.25rem;
            border-bottom-left-radius: var(--radius-card);
            border-bottom-right-radius: var(--radius-card);
            margin-top: -0.5rem;
            margin-bottom: 0.75rem;
        }

        /* Section 12: 转化底线 CTA */
        .cta-box-panel {
            background: linear-gradient(135deg, #181b22 0%, #111317 100%);
            border: 1px solid #2d3748;
            border-radius: 12px;
            padding: 4rem 3rem;
            color: #fff;
            box-shadow: 0 20px 40px rgba(0,0,0,0.3);
        }
        .cta-form-input {
            height: 48px;
            background: #222733;
            border: 1px solid #3b4252;
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 0 16px;
            font-size: 0.95rem;
        }
        .cta-form-input:focus {
            background: #252b38;
            border-color: var(--accent);
            box-shadow: none;
            outline: none;
        }

        /* 页脚统一规范 */
        .site-footer {
            background-color: #0b0d11;
            color: #94a3b8;
            padding: 5rem 0 2.5rem 0;
            border-top: 1px solid #1e2430;
            font-size: 0.875rem;
        }
        .footer-logo {
            font-size: 1.35rem;
            color: #fff;
            font-weight: 800;
            margin-bottom: 1rem;
            display: inline-block;
        }
        .footer-title {
            color: #f1f5f9;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .compliance-bar {
            margin-top: 3.5rem;
            padding-top: 1.75rem;
            border-top: 1px solid #1a1f2c;
            font-size: 0.8125rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }

        /* 响应式调整 */
        @media screen and (max-width: 1024px) {
            .hero-h1 { font-size: 2.5rem; }
            .nav-menu { display: none; }
            .mobile-toggle { display: block; }
        }
        @media screen and (max-width: 640px) {
            .hero-h1 { font-size: 2rem; }
            .section-wrap { padding: 3.5rem 0; }
            .section-title { font-size: 1.75rem; }
            .cta-box-panel { padding: 2rem 1.5rem; }
            .hero-stats-badge-row { flex-direction: column; gap: 1rem; }
        }