/* roulang page: index */
:root {
      --primary: #00E575;
      --primary-hover: #00c765;
      --graphite: #12161A;
      --card-bg: #1F2429;
      --border-dark: #2C343C;
      --bg-light: #F5F7F9;
      --bg-deep: #0F1215;
      --text-dark: #0B1015;
      --text-muted: #4A5568;
      --text-light: #E2E8F0;
      --text-sub: #94A3B8;
      --radius-sm: 4px;
      --radius-md: 6px;
      --shadow-subtle: 0 4px 16px rgba(0, 0, 0, 0.05);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-dark);
      background-color: #ffffff;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }
    a:hover, a:focus {
      color: var(--primary);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    h1, h2, h3, h4, h5 {
      font-weight: 700;
      line-height: 1.35;
      letter-spacing: -0.02em;
      color: inherit;
      margin: 0 0 1rem;
    }
    p {
      margin-bottom: 1.25rem;
    }
    .grid-container {
      max-width: 1240px;
    }
    .btn-action-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary);
      color: #050b07;
      font-weight: 700;
      font-size: 15px;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--primary);
      cursor: pointer;
      min-height: 44px;
      min-width: 44px;
      transition: all 0.2s ease;
    }
    .btn-action-primary:hover {
      background: var(--graphite);
      color: var(--primary);
      border-color: var(--primary);
      box-shadow: 0 0 12px rgba(0, 229, 117, 0.3);
    }
    .btn-action-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      color: #ffffff;
      font-weight: 600;
      font-size: 15px;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.25);
      cursor: pointer;
      min-height: 44px;
      min-width: 44px;
      transition: all 0.2s ease;
    }
    .btn-action-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(0, 229, 117, 0.05);
    }
    .site-masthead {
      border-bottom: 1px solid var(--border-dark);
      background: #090c0e;
      color: #fff;
    }
    .masthead-top {
      padding: 14px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
    }
    .brand-mark {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.05em;
      color: #ffffff;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-mark span {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: var(--primary);
      border-radius: 50%;
    }
    .masthead-stats {
      display: flex;
      gap: 20px;
      color: var(--text-sub);
      justify-content: flex-end;
      align-items: center;
    }
    .masthead-channel-bar {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(15, 18, 21, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .channel-nav {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .channel-nav li {
      display: inline-flex;
      align-items: center;
    }
    .channel-nav li a {
      color: #cbd5e1;
      padding: 14px 18px;
      font-size: 14px;
      font-weight: 600;
      letter-spacing: 0.02em;
    }
    .channel-nav li a:hover {
      color: var(--primary);
    }
    .channel-nav .nav-pipe {
      color: rgba(255, 255, 255, 0.2);
      font-size: 12px;
      user-select: none;
    }
    .section-wrap {
      padding: 96px 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-light);
      color: var(--text-dark);
      border-bottom: 1px solid #e2e8f0;
    }
    .section-white {
      background-color: #ffffff;
      color: var(--text-dark);
      border-bottom: 1px solid #edf2f7;
    }
    .section-deep {
      background-color: var(--bg-deep);
      color: #ffffff;
      border-bottom: 1px solid var(--border-dark);
    }
    .section-title-wrap {
      margin-bottom: 48px;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      color: var(--primary);
      margin-bottom: 8px;
      background: rgba(0, 229, 117, 0.1);
      padding: 3px 10px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(0, 229, 117, 0.2);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.75;
      margin-bottom: 0;
    }
    .section-deep .section-desc {
      color: var(--text-sub);
    }
    #hero {
      position: relative;
      background: linear-gradient(180deg, rgba(15,18,21,0.92) 0%, rgba(9,12,14,0.96) 100%), url('/assets/images/352f111714577d12.jpg') center/cover no-repeat;
      color: #ffffff;
      padding: 100px 0 120px;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 1.5rem;
      letter-spacing: -0.03em;
    }
    .hero-h1 span {
      color: var(--primary);
    }
    .hero-lead {
      font-size: 17px;
      color: #94a3b8;
      line-height: 1.85;
      margin-bottom: 2rem;
      max-width: 780px;
    }
    .fissure-progress-box {
      background: rgba(31, 36, 41, 0.85);
      border: 1px solid var(--border-dark);
      padding: 24px;
      border-radius: var(--radius-md);
      margin-bottom: 2rem;
      backdrop-filter: blur(4px);
    }
    .progress-bar-container {
      background: #090c0e;
      height: 8px;
      border-radius: 4px;
      overflow: hidden;
      margin: 10px 0 6px;
    }
    .progress-bar-inner {
      width: 76%;
      height: 100%;
      background: var(--primary);
      border-radius: 4px;
      box-shadow: 0 0 10px var(--primary);
    }
    .hero-btn-row {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .card-matrix {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-md);
      padding: 30px;
      height: 100%;
      transition: all 0.25s ease;
      box-shadow: var(--shadow-subtle);
    }
    .card-matrix:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    }
    .matrix-icon-badge {
      display: inline-block;
      width: 44px;
      height: 44px;
      line-height: 44px;
      text-align: center;
      background: #f0fdf4;
      color: #059669;
      font-weight: 800;
      border-radius: var(--radius-sm);
      margin-bottom: 18px;
      border: 1px solid #bbf7d0;
    }
    .product-card {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-subtle);
      transition: transform 0.2s ease, border-color 0.2s ease;
    }
    .product-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
    }
    .product-card-body {
      padding: 26px;
    }
    .tech-specs-table {
      width: 100%;
      margin: 16px 0 20px;
      font-size: 13px;
      border-collapse: collapse;
    }
    .tech-specs-table td {
      padding: 8px 6px;
      border-bottom: 1px dashed #e2e8f0;
      color: #64748b;
    }
    .tech-specs-table td:last-child {
      text-align: right;
      font-weight: 600;
      color: #1e293b;
    }
    .flow-pipeline-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }
    .flow-step-item {
      background: var(--card-bg);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-number {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 12px;
    }
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-data-val {
      font-size: 44px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    }
    .story-card-box {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-subtle);
    }
    .story-content {
      padding: 32px;
    }
    .badge-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      padding: 2px 8px;
      background: #f1f5f9;
      color: #475569;
      border-radius: var(--radius-sm);
      margin-right: 6px;
      margin-bottom: 12px;
    }
    .accordion-item {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .accordion-header {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
    }
    .accordion-header:hover {
      background: #f8fafc;
      color: #059669;
    }
    .accordion-body {
      padding: 0 24px 20px;
      color: #475569;
      font-size: 14.5px;
      line-height: 1.8;
      border-top: 1px solid #f1f5f9;
      margin-top: 8px;
      padding-top: 14px;
    }
    .cta-banner-box {
      background: linear-gradient(135deg, #12161A 0%, #1a2228 100%);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 56px 40px;
      color: #ffffff;
    }
    .cta-form-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
    }
    .cta-input-control {
      flex: 1 1 240px;
      min-height: 44px;
      padding: 10px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-dark);
      background: #0b0e11;
      color: #ffffff;
      font-size: 14px;
    }
    .cta-input-control:focus {
      outline: none;
      border-color: var(--primary);
    }
    .footer-primary {
      background: #090c0e;
      color: #94a3b8;
      border-top: 1px solid var(--border-dark);
      padding: 64px 0 32px;
      font-size: 14px;
    }
    .footer-head-title {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
      letter-spacing: 0.05em;
    }
    .footer-links-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list a {
      color: #94a3b8;
    }
    .footer-links-list a:hover {
      color: var(--primary);
    }
    .footer-bottom-line {
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      text-align: center;
      font-size: 13px;
    }
    @media (max-width: 1024px) {
      .metrics-bar-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .section-wrap {
        padding: 56px 0;
      }
      .hero-h1 {
        font-size: 2.1rem;
      }
      .metrics-bar-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .channel-nav li a {
        padding: 10px 12px;
        font-size: 13px;
      }
      .cta-banner-box {
        padding: 32px 20px;
      }
    }