/* roulang page: index */
:root {
      --bg-dark: #06090f;
      --bg-navy: #0b101b;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --card-border: #e2e8f0;
      --card-dark-border: rgba(255, 255, 255, 0.08);
      --primary: #635bff;
      --primary-hover: #4e44e0;
      --accent: #00d4b2;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #94a3b8;
      --text-white: #ffffff;
      --metric-green: #10b981;
      --alert-orange: #f59e0b;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 10px 15px -5px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 20px 25px -5px rgba(99, 91, 255, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --container-width: 1200px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.65;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font-family: inherit; }
    .container { width: 100%; max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }
    
    /* Top Bar & Header */
    .topbar { background: #0b121e; color: var(--text-light); font-size: 13px; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
    .topbar .container { display: flex; justify-content: space-between; align-items: center; }
    .topbar-info span { margin-right: 20px; }
    .topbar-badge { background: rgba(99, 91, 255, 0.25); color: #8da4ff; padding: 2px 8px; border-radius: 4px; font-weight: 500; }

    header {
      position: sticky; top: 0; z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--card-border);
    }
    .nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
    .brand-logo { font-size: 20px; font-weight: 800; color: #0b101b; display: flex; align-items: center; gap: 8px; letter-spacing: -0.5px; }
    .brand-logo svg { width: 28px; height: 28px; fill: var(--primary); }
    .nav-links { display: flex; list-style: none; gap: 28px; align-items: center; }
    .nav-links a { color: var(--text-muted); font-size: 14px; font-weight: 600; }
    .nav-links a:hover, .nav-links a.active { color: var(--primary); }
    .nav-cta { display: flex; align-items: center; gap: 12px; }
    .btn-outline { border: 1px solid #cbd5e1; padding: 8px 18px; border-radius: var(--radius-sm); font-weight: 600; font-size: 13px; color: var(--text-main); background: #fff; cursor: pointer; }
    .btn-outline:hover { border-color: var(--primary); color: var(--primary); }
    .btn-primary { background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%); color: #fff; padding: 9px 20px; border-radius: var(--radius-sm); font-weight: 600; font-size: 13px; border: none; cursor: pointer; box-shadow: 0 4px 12px rgba(99, 91, 255, 0.25); }
    .btn-primary:hover { opacity: 0.95; transform: translateY(-1px); }

    /* Sections Shared */
    section { padding: 90px 0; }
    .section-head { text-align: center; max-width: 780px; margin: 0 auto 56px; }
    .section-head.left-aligned { text-align: left; margin: 0 0 48px; max-width: 640px; }
    .section-tag { display: inline-block; padding: 4px 12px; background: rgba(99, 91, 255, 0.08); color: var(--primary); border-radius: 30px; font-size: 13px; font-weight: 700; margin-bottom: 14px; text-transform: uppercase; letter-spacing: 0.5px; }
    .section-tag.light { background: rgba(0, 212, 178, 0.12); color: var(--accent); }
    .section-title { font-size: 34px; font-weight: 800; color: var(--text-main); line-height: 1.3; margin-bottom: 16px; letter-spacing: -0.5px; }
    .section-desc { font-size: 15px; color: var(--text-muted); line-height: 1.7; }

    /* 1. Hero Live Broadcast Section */
    .hero-section {
      background: #090e18 url('/assets/images/0ab4eeb70d7c2671.webp') no-repeat center center / cover;
      position: relative;
      padding: 100px 0 120px;
      color: #fff;
    }
    .hero-section::before {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(180deg, rgba(6, 9, 15, 0.88) 0%, rgba(9, 14, 24, 0.95) 100%);
    }
    .hero-content { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
    .hero-badge { 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 14px; border-radius: 20px; font-size: 13px; color: #a5b4fc; margin-bottom: 24px; }
    .hero-badge-pulse { width: 8px; height: 8px; border-radius: 50%; background: #ef4444; animation: pulse 1.6s infinite; }
    @keyframes pulse { 0% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(1.3); } 100% { opacity: 1; transform: scale(1); } }
    .hero-h1 { font-size: 46px; font-weight: 800; line-height: 1.25; margin-bottom: 22px; color: #ffffff; letter-spacing: -0.8px; }
    .hero-intro { font-size: 16px; color: #cbd5e1; line-height: 1.75; margin-bottom: 32px; }
    .hero-actions { display: flex; gap: 16px; align-items: center; }
    .hero-btn-primary { background: linear-gradient(135deg, #635bff 0%, #00d4b2 100%); color: #fff; padding: 14px 28px; border-radius: 8px; font-weight: 700; font-size: 15px; border: none; cursor: pointer; box-shadow: 0 8px 24px rgba(99, 91, 255, 0.35); }
    .hero-btn-primary:hover { opacity: 0.92; }
    .hero-btn-secondary { background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.2); color: #fff; padding: 14px 24px; border-radius: 8px; font-weight: 600; font-size: 14px; cursor: pointer; }
    .hero-btn-secondary:hover { background: rgba(255, 255, 255, 0.15); }
    
    .broadcast-card {
      background: rgba(15, 23, 42, 0.75);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 32px;
      backdrop-filter: blur(16px);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }
    .broadcast-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.08); padding-bottom: 16px; }
    .broadcast-status { font-size: 12px; font-weight: 700; color: #38bdf8; letter-spacing: 0.5px; text-transform: uppercase; }
    .countdown-timer { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 24px; }
    .timer-box { background: rgba(0, 0, 0, 0.35); border: 1px solid rgba(255, 255, 255, 0.08); padding: 12px 6px; text-align: center; border-radius: 8px; }
    .timer-num { font-size: 24px; font-weight: 800; color: #fff; line-height: 1.1; }
    .timer-label { font-size: 11px; color: #94a3b8; margin-top: 4px; }
    .broadcast-topic { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
    .broadcast-desc { font-size: 13px; color: #94a3b8; margin-bottom: 20px; line-height: 1.5; }
    .subscribe-box { display: flex; gap: 8px; }
    .subscribe-input { flex: 1; background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.18); border-radius: 6px; padding: 10px 14px; font-size: 13px; color: #fff; }
    .subscribe-input:focus { outline: none; border-color: var(--primary); }
    .subscribe-btn { background: var(--primary); border: none; color: #fff; padding: 10px 18px; border-radius: 6px; font-size: 13px; font-weight: 600; cursor: pointer; white-space: nowrap; }

    /* 2. Industry Challenges */
    .bg-light-sec { background: var(--bg-light); }
    .challenges-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
    .challenge-card { background: #fff; padding: 30px 24px; border-radius: var(--radius-md); border: 1px solid var(--card-border); box-shadow: var(--shadow-sm); transition: transform 0.25s ease; }
    .challenge-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .challenge-tag { font-size: 12px; font-weight: 700; color: #ef4444; background: #fef2f2; padding: 3px 8px; border-radius: 4px; display: inline-block; margin-bottom: 14px; }
    .challenge-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--text-main); }
    .challenge-card p { font-size: 13.5px; color: var(--text-muted); line-height: 1.6; }

    /* 3. Product Architecture Overview */
    .overview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
    .spec-table-list { list-style: none; margin: 24px 0 32px; display: flex; flex-direction: column; gap: 14px; }
    .spec-item { display: flex; align-items: flex-start; gap: 14px; }
    .spec-icon { width: 22px; height: 22px; background: rgba(99, 91, 255, 0.12); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 800; flex-shrink: 0; margin-top: 2px; }
    .spec-text h4 { font-size: 15px; font-weight: 700; color: var(--text-main); }
    .spec-text p { font-size: 13px; color: var(--text-muted); margin-top: 2px; }
    .overview-visual { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.15); border: 1px solid #e2e8f0; }

    /* 4. Core Features Matrix */
    .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .feature-card { background: #fff; border-radius: var(--radius-md); padding: 32px 26px; border: 1px solid var(--card-border); position: relative; transition: all 0.25s ease; }
    .feature-card:hover { border-color: #a5b4fc; box-shadow: var(--shadow-hover); transform: translateY(-3px); }
    .feature-metric-badge { position: absolute; top: 28px; right: 26px; font-size: 11px; font-weight: 700; color: var(--metric-green); background: #ecfdf5; padding: 2px 8px; border-radius: 12px; }
    .feature-icon-bar { width: 44px; height: 44px; border-radius: 10px; background: linear-gradient(135deg, rgba(99,91,255,0.1) 0%, rgba(0,212,178,0.1) 100%); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; color: var(--primary); font-size: 20px; font-weight: 800; }
    .feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
    .feature-card p { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; margin-bottom: 16px; }
    .feature-subpoints { list-style: none; display: flex; flex-direction: column; gap: 6px; border-top: 1px dashed #e2e8f0; padding-top: 14px; }
    .feature-subpoints li { font-size: 12.5px; color: #64748b; display: flex; align-items: center; gap: 6px; }
    .feature-subpoints li::before { content: "•"; color: var(--primary); font-weight: bold; }

    /* 5. Solution Scenarios */
    .solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .sol-card { background: #fff; border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--card-border); display: flex; flex-direction: column; }
    .sol-img-wrapper { position: relative; height: 190px; overflow: hidden; }
    .sol-img-wrapper img { width: 100%; height: 100%; object-fit: cover; }
    .sol-badge { position: absolute; bottom: 12px; left: 14px; background: rgba(15, 23, 42, 0.85); color: #fff; font-size: 11px; padding: 3px 10px; border-radius: 4px; backdrop-filter: blur(4px); font-weight: 600; }
    .sol-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
    .sol-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
    .sol-body p { font-size: 13.5px; color: var(--text-muted); margin-bottom: 18px; flex: 1; line-height: 1.6; }
    .sol-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
    .sol-tags span { font-size: 11px; color: var(--text-muted); background: #f1f5f9; padding: 2px 8px; border-radius: 4px; }
    .sol-link-btn { font-size: 13px; font-weight: 700; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; }

    /* 6. Deep Dark Concept Section */
    .concept-section {
      background: var(--bg-navy) url('/assets/images/735d6f5d0e1097b4.jpg') no-repeat center center / cover;
      position: relative;
      color: #fff;
      padding: 100px 0;
    }
    .concept-section::before {
      content: ""; position: absolute; inset: 0;
      background: rgba(6, 9, 15, 0.94);
    }
    .concept-inner { position: relative; z-index: 2; }
    .concept-head { text-align: center; max-width: 800px; margin: 0 auto 56px; }
    .concept-head h2 { font-size: 34px; font-weight: 800; color: #fff; margin-bottom: 16px; }
    .concept-head p { font-size: 15px; color: var(--text-light); line-height: 1.7; }
    .pipeline-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .pipeline-step { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--card-dark-border); border-radius: var(--radius-md); padding: 24px 20px; position: relative; }
    .step-num { font-size: 12px; font-weight: 800; color: var(--accent); letter-spacing: 1px; margin-bottom: 10px; display: block; }
    .pipeline-step h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
    .pipeline-step p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

    /* 7. Client Success Stories */
    .stories-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
    .story-card { background: #fff; border-radius: var(--radius-md); padding: 32px; border: 1px solid var(--card-border); box-shadow: var(--shadow-sm); }
    .story-company { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
    .story-type { font-size: 12px; font-weight: 700; color: var(--primary); background: #e0e7ff; padding: 2px 8px; border-radius: 4px; }
    .story-title { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
    .story-quote { font-size: 13.5px; color: var(--text-muted); line-height: 1.7; margin-bottom: 24px; }
    .story-metrics-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; background: var(--bg-light); padding: 16px; border-radius: 8px; }
    .story-metric-item h5 { font-size: 22px; font-weight: 800; color: var(--primary); }
    .story-metric-item span { font-size: 12px; color: var(--text-muted); }

    /* 8. Hard Metrics Bar */
    .metrics-bar-section { background: #0f172a; color: #fff; padding: 60px 0; border-top: 1px solid rgba(255,255,255,0.06); border-bottom: 1px solid rgba(255,255,255,0.06); }
    .metrics-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
    .metric-col h3 { font-size: 42px; font-weight: 800; color: #ffffff; letter-spacing: -1px; margin-bottom: 6px; }
    .metric-col h3 span { color: var(--accent); }
    .metric-col p { font-size: 14px; color: #94a3b8; font-weight: 500; }

    /* 9. Testimonials */
    .testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .testi-card { background: #fff; border-radius: var(--radius-md); padding: 28px; border: 1px solid var(--card-border); box-shadow: var(--shadow-sm); display: flex; flex-direction: column; justify-content: space-between; }
    .testi-stars { color: #f59e0b; font-size: 14px; margin-bottom: 12px; }
    .testi-text { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; margin-bottom: 20px; }
    .testi-author { display: flex; align-items: center; gap: 12px; }
    .testi-avatar { width: 42px; height: 42px; border-radius: 50%; background: #e2e8f0; display: flex; align-items: center; justify-content: center; font-weight: 700; color: #475569; font-size: 14px; }
    .testi-name { font-size: 14px; font-weight: 700; color: var(--text-main); }
    .testi-role { font-size: 12px; color: #64748b; }

    /* 10. Industry Insights */
    .insights-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
    .insight-card { background: #fff; border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--card-border); display: flex; flex-direction: column; }
    .insight-img { height: 180px; overflow: hidden; }
    .insight-img img { width: 100%; height: 100%; object-fit: cover; }
    .insight-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
    .insight-date { font-size: 12px; color: #94a3b8; margin-bottom: 8px; font-weight: 500; }
    .insight-title { font-size: 16px; font-weight: 700; margin-bottom: 10px; line-height: 1.45; }
    .insight-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; flex: 1; }
    .insight-meta { font-size: 12px; color: var(--primary); font-weight: 600; }

    /* 11. FAQ Accordion */
    .faq-wrapper { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
    .faq-item { background: #fff; border: 1px solid var(--card-border); border-radius: 8px; overflow: hidden; transition: all 0.2s ease; }
    .faq-item.active { border-color: var(--primary); box-shadow: 0 4px 12px rgba(99,91,255,0.06); }
    .faq-trigger { padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; user-select: none; font-size: 16px; font-weight: 700; color: var(--text-main); }
    .faq-icon { font-size: 18px; color: var(--text-light); transition: transform 0.25s ease; }
    .faq-item.active .faq-icon { transform: rotate(180deg); color: var(--primary); }
    .faq-body { display: none; padding: 0 24px 20px; font-size: 14px; color: var(--text-muted); line-height: 1.7; border-top: 1px solid #f1f5f9; padding-top: 14px; }
    .faq-item.active .faq-body { display: block; }

    /* 12. Bottom Conversion CTA & Form */
    .cta-banner-section {
      background: linear-gradient(135deg, #090e18 0%, #171d31 100%);
      color: #fff;
      padding: 90px 0;
      position: relative;
    }
    .cta-container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
    .cta-info h2 { font-size: 34px; font-weight: 800; line-height: 1.3; margin-bottom: 18px; }
    .cta-info p { font-size: 15px; color: #cbd5e1; line-height: 1.7; margin-bottom: 24px; }
    .cta-feature-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .cta-feature-list li { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: #94a3b8; }
    .cta-feature-list li::before { content: "✓"; color: var(--accent); font-weight: bold; }
    
    .cta-form-card { background: #fff; border-radius: var(--radius-md); padding: 36px 32px; box-shadow: 0 20px 40px rgba(0,0,0,0.3); color: var(--text-main); }
    .cta-form-card h3 { font-size: 20px; font-weight: 800; margin-bottom: 6px; }
    .cta-form-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; }
    .form-group { margin-bottom: 16px; }
    .form-group label { display: block; font-size: 12px; font-weight: 700; margin-bottom: 6px; color: #334155; }
    .form-control { width: 100%; border: 1px solid #cbd5e1; border-radius: 6px; padding: 10px 12px; font-size: 13.5px; }
    .form-control:focus { outline: none; border-color: var(--primary); }
    .form-submit-btn { width: 100%; background: linear-gradient(135deg, var(--primary) 0%, #4338ca 100%); color: #fff; border: none; padding: 13px; font-size: 14px; font-weight: 700; border-radius: 6px; cursor: pointer; margin-top: 8px; }
    .form-submit-btn:hover { opacity: 0.95; }
    .form-privacy { font-size: 11px; color: #94a3b8; text-align: center; margin-top: 12px; }

    /* Footer */
    footer { background: #06090f; color: #94a3b8; padding: 70px 0 30px; border-top: 1px solid rgba(255,255,255,0.06); font-size: 13px; }
    .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 50px; }
    .footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px; }
    .footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .footer-links a:hover { color: #fff; }
    .footer-brand-p { font-size: 13px; line-height: 1.7; margin: 16px 0 20px; color: #64748b; }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 28px; display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: #64748b; }
    
    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-content, .overview-grid, .cta-container { grid-template-columns: 1fr; gap: 40px; }
      .challenges-grid, .pipeline-grid { grid-template-columns: repeat(2, 1fr); }
      .features-grid, .solutions-grid, .testimonials-grid, .insights-grid { grid-template-columns: repeat(2, 1fr); }
      .metrics-row { grid-template-columns: repeat(2, 1fr); gap: 32px; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links, .topbar { display: none; }
      .hero-h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .challenges-grid, .features-grid, .solutions-grid, .stories-grid, .testimonials-grid, .insights-grid, .pipeline-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
      .countdown-timer { grid-template-columns: repeat(4, 1fr); }
    }