/* roulang page: index */
:root {
      --primary: #00A86B;
      --primary-hover: #008F5B;
      --secondary: #1E293B;
      --accent: #38BDF8;
      --bg-light: #F8FAFC;
      --card-white: #FFFFFF;
      --dark-section: #0F172A;
      --text-dark: #0F172A;
      --text-main: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-pill: 9999px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 12px 24px -4px rgba(0, 168, 107, 0.12), 0 6px 10px -4px rgba(15, 23, 42, 0.06);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    a:hover {
      color: var(--primary-hover);
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-dark);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 0.75rem;
    }

    p {
      margin-bottom: 1rem;
    }

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

    /* Container Utility */
    .custom-container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* Top Header & Two-tier Navigation */
    .site-header {
      background: #FFFFFF;
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    }
    .header-top {
      border-bottom: 1px solid var(--border-color);
      padding: 12px 0;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--secondary);
    }
    .brand-logo i {
      color: var(--primary);
      font-size: 1.6rem;
    }
    .header-actions {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 20px;
    }
    .hotline {
      font-size: 0.875rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hotline strong {
      color: var(--secondary);
      font-weight: 700;
    }
    .btn-nav-cta {
      background-color: var(--primary);
      color: #fff !important;
      padding: 8px 18px;
      border-radius: var(--radius-pill);
      font-size: 0.875rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: background-color 0.2s, transform 0.2s;
    }
    .btn-nav-cta:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }

    /* Channel Tabs Navigation */
    .header-tabs-bar {
      background: #FFFFFF;
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
      padding: 8px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .header-tabs-bar::-webkit-scrollbar {
      height: 3px;
    }
    .header-tabs-bar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .pill-nav-list {
      display: flex;
      gap: 10px;
      padding: 0 4px;
    }
    .pill-tab {
      display: inline-block;
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text-main);
      background-color: #F1F5F9;
      transition: all 0.2s ease;
    }
    .pill-tab:hover {
      color: var(--primary);
      background-color: #E2E8F0;
    }
    .pill-tab.active {
      background-color: var(--primary);
      color: #FFFFFF !important;
    }

    /* Section Global Styles */
    .content-section {
      padding: 72px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--dark-section);
      color: #E2E8F0;
    }
    .section-dark h2, .section-dark h3, .section-dark h4 {
      color: #FFFFFF;
    }
    .section-dark p {
      color: #94A3B8;
    }
    .section-white {
      background-color: var(--card-white);
    }
    .section-title-wrap {
      margin-bottom: 44px;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      background-color: rgba(0, 168, 107, 0.1);
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
    }
    .section-dark .section-badge {
      background-color: rgba(56, 189, 248, 0.15);
      color: var(--accent);
    }
    .section-title {
      font-size: 1.85rem;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.7;
    }

    /* Buttons */
    .btn-main {
      background-color: var(--primary);
      color: #FFFFFF !important;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-main:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(0, 168, 107, 0.25);
    }
    .btn-secondary {
      background-color: transparent;
      color: var(--secondary) !important;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid var(--border-color);
      transition: all 0.2s ease;
    }
    .btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }
    .btn-outline-white {
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: #FFFFFF !important;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline-white:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
    }

    /* Section 1: Hero Video / Modern Overlay */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 41, 59, 0.82)), url('/assets/images/82ff2674565f48c7.jpg') center/cover no-repeat;
      padding: 96px 0 88px 0;
      color: #FFFFFF;
      overflow: hidden;
    }
    .hero-content h1 {
      color: #FFFFFF;
      font-size: 2.5rem;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-intro {
      font-size: 1.1rem;
      color: #E2E8F0;
      line-height: 1.8;
      margin-bottom: 32px;
      max-width: 760px;
    }
    .hero-btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .hero-status-strip {
      display: flex;
      gap: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 24px;
      flex-wrap: wrap;
    }
    .status-item span {
      display: block;
      font-size: 0.85rem;
      color: #94A3B8;
    }
    .status-item strong {
      font-size: 1.15rem;
      color: var(--accent);
    }
    .hero-preview-frame {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 16px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
      backdrop-filter: blur(8px);
    }
    .hero-preview-frame img {
      border-radius: var(--radius-sm);
      width: 100%;
    }

    /* Cards */
    .modern-card {
      background: var(--card-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .modern-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(0, 168, 107, 0.3);
    }
    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      background-color: rgba(0, 168, 107, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
    }

    /* Section 2: Architecture */
    .arch-spec-list {
      list-style: none;
      padding: 0;
    }
    .arch-spec-list li {
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      justify-content: space-between;
      font-size: 0.95rem;
    }
    .arch-spec-list li strong {
      color: var(--text-dark);
    }

    /* Section 4: Scenarios */
    .scenario-tab-content {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .scenario-box {
      padding: 32px;
    }

    /* Section 5: Console Showcase */
    .console-stage {
      background: #0B1120;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 24px;
      position: relative;
    }
    .console-stage img {
      border-radius: var(--radius-sm);
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .metric-bubble {
      background: rgba(30, 41, 59, 0.9);
      border: 1px solid rgba(56, 189, 248, 0.3);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      margin-top: 16px;
    }
    .metric-bubble h4 {
      font-size: 0.95rem;
      color: var(--accent);
      margin-bottom: 4px;
    }
    .metric-bubble p {
      font-size: 0.85rem;
      color: #CBD5E1;
      margin-bottom: 0;
    }

    /* Section 8: Metrics Counter Bar */
    .metrics-bar {
      background: linear-gradient(90deg, #008F5B 0%, #00A86B 50%, #0D9488 100%);
      color: #FFFFFF;
      padding: 48px 0;
    }
    .metric-item {
      text-align: center;
      padding: 10px;
    }
    .metric-item .count {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.1;
      margin-bottom: 6px;
      letter-spacing: -1px;
    }
    .metric-item .label {
      font-size: 0.95rem;
      opacity: 0.9;
    }

    /* Section 9: Testimonials */
    .quote-box {
      position: relative;
      padding-top: 10px;
    }
    .quote-box i.fa-quote-left {
      color: rgba(0, 168, 107, 0.2);
      font-size: 2rem;
      margin-bottom: 12px;
      display: block;
    }
    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 20px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-muted);
      font-size: 1.1rem;
    }

    /* Section 10: News Feed */
    .news-card-img {
      height: 180px;
      object-fit: cover;
      width: 100%;
      border-top-left-radius: var(--radius-md);
      border-top-right-radius: var(--radius-md);
    }
    .news-card-body {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-card-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    /* Section 11: Accordion FAQ */
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .accordion-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
      padding: 16px 20px;
      background: #FFFFFF;
      display: block;
      border: none;
    }
    .accordion-title:hover {
      background: #F8FAFC;
    }
    .accordion-content {
      padding: 18px 20px;
      color: var(--text-main);
      font-size: 0.95rem;
      line-height: 1.7;
      border-top: 1px solid var(--border-color);
      background: #FAFAFA;
    }

    /* Section 12: CTA Box */
    .cta-container {
      background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
      border-radius: var(--radius-md);
      padding: 56px 40px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .cta-form {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      padding: 24px;
    }
    .cta-form input, .cta-form select, .cta-form textarea {
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      height: 42px;
      font-size: 0.9rem;
    }
    .cta-form textarea {
      height: 80px;
    }

    /* Footer */
    .site-footer {
      background: #090E17;
      color: #94A3B8;
      padding: 60px 0 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .site-footer h5 {
      color: #FFFFFF;
      font-size: 1.1rem;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94A3B8;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      margin-top: 40px;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 1.85rem;
      }
      .section-title {
        font-size: 1.5rem;
      }
      .cta-container {
        padding: 32px 20px;
      }
      .header-actions .hotline {
        display: none;
      }
      .metrics-bar .count {
        font-size: 2rem;
      }
    }