/* roulang page: index */
:root {
            --primary: #0F172A;
            --primary-light: #1E293B;
            --signal-green: #059669;
            --signal-green-light: #10B981;
            --signal-blue: #2563EB;
            --signal-amber: #F59E0B;
            --bg-page: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #0B0F17;
            --bg-dark-card: #131A26;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --border-dark: #26334D;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 12px 24px -8px rgba(15, 23, 42, 0.09);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-page);
            color: var(--text-body);
            line-height: 1.6;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        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;
        }

        /* Top Bar */
        .top-bar {
            background-color: #F1F5F9;
            height: 36px;
            font-size: 12px;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
        }

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

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
        }

        .status-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: var(--signal-green-light);
            box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
        }

        .top-bar-links {
            display: flex;
            gap: 16px;
        }

        .top-bar-links a:hover {
            color: var(--signal-blue);
        }

        /* Main Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-light);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo-box {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .logo-symbol {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--signal-green), var(--signal-blue));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            font-weight: 900;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-menu a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            position: relative;
            padding: 6px 0;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--signal-blue);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--signal-blue);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* Buttons & Badges */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.2s ease;
            border: 1px solid transparent;
            min-height: 44px;
            min-width: 44px;
        }

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

        .btn-primary:hover {
            background-color: #047857;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
        }

        .btn-secondary {
            background-color: #FFFFFF;
            border-color: var(--border-light);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            border-color: var(--signal-blue);
            color: var(--signal-blue);
            background-color: #F8FAFC;
        }

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

        .btn-dark:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 20px;
            background-color: rgba(5, 150, 105, 0.1);
            color: var(--signal-green);
            margin-bottom: 14px;
            border: 1px solid rgba(5, 150, 105, 0.2);
        }

        .badge-pill.blue {
            background-color: rgba(37, 99, 235, 0.1);
            color: var(--signal-blue);
            border-color: rgba(37, 99, 235, 0.2);
        }

        /* Section Layout Common */
        .section-block {
            padding: 88px 0;
            position: relative;
        }

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

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

        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 56px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .section-block.bg-dark .section-title {
            color: #FFFFFF;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .section-block.bg-dark .section-subtitle {
            color: #94A3B8;
        }

        /* Block 1: Hero Banner (Fission & Live Stream) */
        .hero-section {
            padding: 70px 0 80px;
            background: linear-gradient(180deg, #F1F5F9 0%, #F8FAFC 100%);
            border-bottom: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.22;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-desc {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.75;
            margin-bottom: 28px;
        }

        /* 裂变首屏奖励说明与进度条 */
        .invite-reward-panel {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            margin-bottom: 28px;
            box-shadow: var(--shadow-sm);
        }

        .reward-info-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .reward-info-bar span {
            color: var(--signal-green);
        }

        .progress-track {
            height: 8px;
            background-color: #E2E8F0;
            border-radius: 4px;
            overflow: hidden;
            margin-bottom: 10px;
        }

        .progress-fill {
            width: 78%;
            height: 100%;
            background: linear-gradient(90deg, var(--signal-green), var(--signal-blue));
            border-radius: 4px;
        }

        .reward-desc-text {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            align-items: center;
        }

        .hero-console {
            background: #0B0F17;
            border: 1px solid #1E293B;
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.4);
            position: relative;
        }

        .console-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid #1E293B;
            padding-bottom: 12px;
            margin-bottom: 16px;
        }

        .console-dots {
            display: flex;
            gap: 6px;
        }

        .console-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: #334155;
        }

        .console-dots span:nth-child(1) { background-color: #EF4444; }
        .console-dots span:nth-child(2) { background-color: #F59E0B; }
        .console-dots span:nth-child(3) { background-color: #10B981; }

        .console-title {
            font-family: monospace;
            font-size: 12px;
            color: #94A3B8;
        }

        .live-score-pill {
            background: rgba(16, 185, 129, 0.15);
            color: #34D399;
            padding: 3px 8px;
            font-size: 11px;
            border-radius: 4px;
            font-weight: 600;
        }

        .console-code {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 12px;
            line-height: 1.6;
            color: #CBD5E1;
            overflow-x: auto;
        }

        .code-key { color: #38BDF8; }
        .code-val { color: #A7F3D0; }
        .code-num { color: #FCD34D; }
        .code-comment { color: #64748B; font-style: italic; }

        /* Block 2: Architecture & Hard Specs */
        .arch-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .arch-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
        }

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

        .arch-specs-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .spec-item {
            display: flex;
            gap: 16px;
        }

        .spec-icon-box {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background-color: rgba(37, 99, 235, 0.1);
            color: var(--signal-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .spec-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .spec-item p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.6;
        }

        /* Block 3: 6-Grid Dimensions */
        .grid-6 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .dim-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
        }

        .dim-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.4);
        }

        .dim-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background-color: #F1F5F9;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 20px;
        }

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

        .dim-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* Block 4: 3 Core Product APIs */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .product-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
            position: relative;
        }

        .product-card.featured {
            border: 2px solid var(--signal-blue);
            box-shadow: 0 8px 24px -6px rgba(37, 99, 235, 0.15);
        }

        .card-top-tag {
            position: absolute;
            top: 14px;
            right: 14px;
            background: var(--signal-blue);
            color: #FFFFFF;
            padding: 4px 10px;
            font-size: 11px;
            font-weight: 700;
            border-radius: 4px;
        }

        .product-card-img {
            height: 190px;
            overflow: hidden;
            background-color: #E2E8F0;
        }

        .product-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .product-card:hover .product-card-img img {
            transform: scale(1.04);
        }

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

        .product-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .product-body p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.65;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .schema-preview {
            background-color: #F8FAFC;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-family: monospace;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        /* Block 5: Interactive Product Demo */
        .demo-box {
            background-color: #0F172A;
            border-radius: var(--radius-lg);
            border: 1px solid #1E293B;
            overflow: hidden;
            box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.5);
        }

        .demo-nav {
            display: flex;
            background-color: #090D14;
            border-bottom: 1px solid #1E293B;
            padding: 0 16px;
        }

        .demo-tab {
            padding: 14px 20px;
            background: transparent;
            border: none;
            color: #94A3B8;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            border-bottom: 2px solid transparent;
            transition: all 0.2s ease;
        }

        .demo-tab.active {
            color: #FFFFFF;
            border-bottom-color: var(--signal-green);
            background-color: rgba(255,255,255,0.03);
        }

        .demo-panel-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            min-height: 380px;
        }

        .demo-visual-side {
            padding: 30px;
            border-right: 1px solid #1E293B;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .visual-match-card {
            background: #1A2234;
            border: 1px solid #2A364F;
            border-radius: var(--radius-md);
            padding: 20px;
        }

        .match-league {
            font-size: 12px;
            color: #94A3B8;
            text-transform: uppercase;
            display: flex;
            justify-content: space-between;
            margin-bottom: 16px;
        }

        .match-teams {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .team-unit {
            text-align: center;
            width: 40%;
        }

        .team-name {
            font-size: 16px;
            font-weight: 700;
            color: #FFFFFF;
            margin-top: 6px;
        }

        .match-score {
            font-size: 32px;
            font-weight: 900;
            color: #34D399;
            letter-spacing: 2px;
        }

        .match-timeline-sample {
            border-top: 1px solid #2A364F;
            padding-top: 14px;
            font-size: 12px;
            color: #94A3B8;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .demo-code-side {
            padding: 24px;
            background-color: #080C13;
            overflow-x: auto;
        }

        /* Block 6: Deep Tech Dark Hub */
        .topology-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
            position: relative;
        }

        .topo-step {
            background: var(--bg-dark-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
        }

        .step-num {
            font-size: 12px;
            font-weight: 800;
            color: var(--signal-green-light);
            background: rgba(16, 185, 129, 0.1);
            display: inline-block;
            padding: 2px 8px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        .topo-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
        }

        .topo-step p {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* Block 7: Solutions & Scenarios */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scenario-item {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
        }

        .scenario-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-thumb {
            height: 160px;
            background-color: #E2E8F0;
        }

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

        .scenario-info {
            padding: 20px;
        }

        .scenario-info h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

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

        /* Block 8: Key SLA Stats Bar */
        .sla-bar-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1E293B 100%);
            padding: 60px 0;
            color: #FFFFFF;
            border-top: 1px solid #334155;
            border-bottom: 1px solid #334155;
        }

        .sla-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .sla-item {
            padding: 0 16px;
            border-right: 1px solid rgba(255, 255, 255, 0.1);
        }

        .sla-item:last-child {
            border-right: none;
        }

        .sla-val {
            font-size: 40px;
            font-weight: 900;
            color: #38BDF8;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.sla-desc {
    font-size: 14px;
    color: #94A3B8;
    margin-top: 8px;
}

/* Footer */
.site-footer {
    background-color: var(--bg-dark);
    color: #94A3B8;
    padding: 80px 0 40px;
    border-top: 1px solid #1E293B;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 48px;
}

.footer-brand h2 {
    color: #FFFFFF;
    font-size: 18px;
    margin-bottom: 16px;
}

.footer-links h4 {
    color: #FFFFFF;
    font-size: 15px;
    margin-bottom: 20px;
}

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

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

.footer-links a:hover {
    color: var(--signal-green-light);
}

.footer-bottom {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid #1E293B;
    text-align: center;
    font-size: 13px;
}

@media (max-width: 1024px) {
    .container { padding: 0 20px; }
    .grid-6 { grid-template-columns: repeat(2, 1fr); }
    .products-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .hero-grid { grid-template-columns: 1fr; }
    .arch-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}