/* roulang page: index */
:root {
            --primary: #0F3A66;
            --primary-dark: #0A2540;
            --primary-light: #1E5B99;
            --secondary: #0EA5E9;
            --accent: #10B981;
            --gold: #D97706;
            --gold-light: #FDE68A;
            --gold-dark: #B45309;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #0A192F;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --border-gold: rgba(217, 119, 6, 0.35);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-subtle: 0 4px 6px -1px rgba(15, 23, 42, 0.05);
            --shadow-card: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.04);
            --shadow-hover: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
            --transition-smooth: all 0.25s ease-in-out;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        /* 顶部通告与全局导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }

        .top-bar {
            background-color: var(--primary-dark);
            color: #94A3B8;
            font-size: 13px;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .top-bar-left span {
            margin-right: 20px;
        }

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

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-badge {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-weight: 800;
            font-size: 18px;
            box-shadow: 0 2px 8px rgba(14, 165, 233, 0.4);
        }

        .logo-text-box h2 {
            font-size: 20px;
            color: var(--primary);
            font-weight: 800;
            line-height: 1.2;
        }

        .logo-text-box span {
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .main-nav {
            display: flex;
            gap: 28px;
            align-items: center;
        }

        .main-nav a {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            padding: 6px 0;
            position: relative;
        }

        .main-nav a:hover, .main-nav a.active {
            color: var(--primary);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--secondary);
        }

        .header-action .btn-nav {
            background-color: var(--primary);
            color: #FFFFFF;
            padding: 9px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            display: inline-block;
        }

        .header-action .btn-nav:hover {
            background-color: var(--primary-light);
            box-shadow: 0 4px 12px rgba(15, 58, 102, 0.25);
        }

        /* 统一 Section 标准 */
        section {
            padding: 72px 0;
            position: relative;
        }

        .section-alt {
            background-color: #FFFFFF;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-dark {
            background-color: var(--bg-dark);
            color: #E2E8F0;
        }

        .section-header {
            text-align: center;
            max-width: 820px;
            margin: 0 auto 52px;
        }

        .section-header .tag-badge {
            display: inline-block;
            background: rgba(14, 165, 233, 0.12);
            color: var(--secondary);
            font-size: 13px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-dark .section-header .tag-badge {
            background: rgba(217, 119, 6, 0.2);
            color: var(--gold-light);
        }

        .section-header h2 {
            font-size: 32px;
            color: var(--text-main);
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .section-dark .section-header h2 {
            color: #FFFFFF;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        .section-dark .section-header p {
            color: #94A3B8;
        }

        /* 板块1：Hero 黑金会员俱乐部感 */
        .hero-vip {
            background: radial-gradient(circle at 85% 15%, #1e293b 0%, #0a1120 100%), url('/assets/images/2dc07bac49d778fd.jpg');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: #FFFFFF;
            padding: 96px 0 84px;
            border-bottom: 1px solid rgba(217, 119, 6, 0.25);
            position: relative;
        }

        .hero-vip::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, rgba(10, 17, 32, 0.94) 30%, rgba(10, 17, 32, 0.75) 100%);
        }

        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.25fr 0.95fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 38px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 60%, var(--gold-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-content .hero-desc {
            font-size: 16px;
            color: #CBD5E1;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .hero-btn-group {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .btn-gold {
            background: linear-gradient(135deg, #D97706 0%, #F59E0B 100%);
            color: #0F172A;
            font-weight: 700;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.4);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-gold:hover {
            background: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #FFFFFF;
            padding: 13px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #FFFFFF;
        }

        .vip-portal-card {
            background: linear-gradient(180deg, rgba(30, 41, 59, 0.85) 0%, rgba(15, 23, 42, 0.95) 100%);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(12px);
        }

        .vip-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 18px;
            margin-bottom: 20px;
        }

        .vip-level-badge {
            background: #B45309;
            color: #FEF3C7;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .vip-tier-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-bottom: 24px;
        }

        .vip-tier-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: #E2E8F0;
        }

        .vip-check-icon {
            color: var(--gold-light);
            font-size: 16px;
            line-height: 1;
        }

        /* 板块2：秒杀闪购与限时申报倒计时 */
        .section-flash-sale {
            background: #FFFBEB;
            border-bottom: 2px solid #FDE68A;
            padding: 48px 0;
        }

        .flash-bar-wrap {
            display: grid;
            grid-template-columns: auto 1fr auto;
            gap: 32px;
            align-items: center;
            background: #FFFFFF;
            border: 1px solid #FCD34D;
            border-radius: var(--radius-md);
            padding: 24px 32px;
            box-shadow: 0 8px 16px rgba(217, 119, 6, 0.08);
        }

        .flash-title-col h3 {
            font-size: 20px;
            color: #92400E;
            font-weight: 800;
            margin-bottom: 4px;
        }

        .flash-title-col p {
            font-size: 13px;
            color: #B45309;
        }

        .flash-timer-box {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .time-node {
            background: #78350F;
            color: #FFFFFF;
            font-size: 20px;
            font-weight: 800;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            min-width: 44px;
            text-align: center;
        }

        .time-sep {
            font-weight: 800;
            color: #92400E;
        }

        .flash-action-col .stock-warning {
            font-size: 13px;
            color: #DC2626;
            font-weight: 700;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* 板块3：活动亮点墙 */
        .grid-highlights {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .highlight-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
        }

        .highlight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--secondary);
        }

        .highlight-card .icon-chip {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(14, 165, 233, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 18px;
        }

        .highlight-card h3 {
            font-size: 19px;
            color: var(--text-main);
            margin-bottom: 10px;
            font-weight: 700;
        }

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

        /* 板块4：研发礼包与合作权益 */
        .grid-benefits {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .benefit-card {
            background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow-subtle);
        }

        .benefit-val {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .benefit-card h4 {
            font-size: 16px;
            color: var(--text-main);
            margin-bottom: 8px;
        }

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

        /* 板块5：技术攻关玩法与流程步骤 */
        .step-timeline-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .step-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            position: relative;
        }

        .step-number {
            font-size: 32px;
            font-weight: 900;
            color: rgba(14, 165, 233, 0.2);
            line-height: 1;
            margin-bottom: 12px;
        }

        .step-item h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 10px;
            font-weight: 700;
        }

        .step-item p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 板块6：阶段交付与奖励成果预览 */
        .preview-bento {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 32px;
            align-items: center;
        }

        .preview-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
        }

        .preview-img-wrap img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        .preview-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .preview-spec-card {
            background: #FFFFFF;
            border-left: 4px solid var(--secondary);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            box-shadow: var(--shadow-subtle);
        }

        .preview-spec-card h4 {
            font-size: 16px;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .preview-spec-card p {
            font-size: 13.5px;
            color: var(--text-muted);
        }

        /* 板块7：科研成果数据对比条 */
        .stats-stripe {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #FFFFFF;
            padding: 60px 0;
        }

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

        .stat-box .num {
            font-size: 40px;
            font-weight: 900;
            color: var(--secondary);
            line-height: 1.1;
            margin-bottom: 8px;
            font-feature-settings: "tnum";
        }

        .stat-box .label {
            font-size: 15px;
            color: #E2E8F0;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .stat-box .desc {
            font-size: 12.5px;
            color: #94A3B8;
        }

        /* 板块8：前沿学术与研发动态资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

        .news-card-img {
            height: 180px;
            overflow: hidden;
        }

        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-smooth);
        }

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

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

        .news-meta {
            font-size: 12px;
            color: var(--secondary);
            font-weight: 700;
            margin-bottom: 8px;
        }

        .news-body h3 {
            font-size: 18px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .news-body p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        /* 板块9：前后改造成效对比 */
        .comparison-table-wrap {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .table-row {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
            align-items: center;
        }

        .table-row:last-child {
            border-bottom: none;
        }

        .table-row.header {
            background: #F1F5F9;
            font-weight: 700;
            color: var(--text-main);
            font-size: 15px;
        }

        .table-cell-highlight {
            color: var(--accent);
            font-weight: 700;
        }

        /* 板块10：产业客户验证口碑 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testi-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-subtle);
            position: relative;
        }

        .testi-quote {
            font-size: 14.5px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 20px;
            font-style: italic;
        }

        .testi-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(--primary);
        }

        .author-info h4 {
            font-size: 15px;
            color: var(--text-main);
        }

        .author-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 板块11：常见工程异议解答 FAQ */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 16px;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #FFFFFF;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            border-top: 1px solid #F1F5F9;
            padding-top: 16px;
        }

        /* 板块12：攻关入驻报名入口与转化表单 */
        .section-registration {
            background: linear-gradient(135deg, #0A192F 0%, #0F3A66 100%);
            color: #FFFFFF;
            padding: 80px 0;
        }

        .form-panel-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .form-info h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .form-info p {
            font-size: 15px;
            color: #CBD5E1;
            margin-bottom: 24px;
            line-height: 1.75;
        }

        .reg-form-card {
            background: #FFFFFF;
            color: var(--text-main);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
        }

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

        .form-group label {
            display: block;
            font-size: 13.5px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 11px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-main);
            background-color: #F8FAFC;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--secondary);
            background-color: #FFFFFF;
        }

        .btn-submit {
            width: 100%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 15px;
            padding: 13px;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(15, 58, 102, 0.25);
            transition: var(--transition-smooth);
        }

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

        /* 统一页脚 */
        .site-footer {
            background-color: #050C16;
            color: #94A3B8;
            padding: 64px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-col h4 {
            font-size: 16px;
            color: #FFFFFF;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

        .footer-links a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
        }

        .footer-bottom a {
            color: #94A3B8;
        }

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

        /* 移动端汉堡切换及响应式 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-main);
            cursor: pointer;
        }

        @media (max-width: 1024px) {
            .grid-highlights, .news-grid, .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-benefits, .step-timeline-flow, .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .preview-bento {
                grid-template-columns: 1fr;
            }
            .form-panel-grid {
                grid-template-columns: 1fr;
            }
            .flash-bar-wrap {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 20px;
            }
            .flash-timer-box {
                justify-content: center;
            }
            .flash-action-col {
                display: flex;
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .main-nav {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .grid-highlights, .news-grid, .testimonials-grid, .grid-benefits, .step-timeline-flow, .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .table-row {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .table-row.header {
                display: none;
            }
        }