/* roulang page: index */
:root {
      --bg-light: #F5F7FA;
      --card-light: #FFFFFF;
      --card-muted: #EEF2F6;
      --bg-dark: #0D1117;
      --card-dark: #161B22;
      --brand-green: #00C48C;
      --brand-blue: #0072FF;
      --brand-coral: #FF5238;
      --text-dark: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-light: #F8FAFC;
      --border-light: rgba(15, 23, 42, 0.08);
      --border-dark: rgba(255, 255, 255, 0.1);
      --gradient-brand: linear-gradient(135deg, #00C48C 0%, #0072FF 100%);
      --gradient-warning: linear-gradient(135deg, #FF5238 0%, #FF8A00 100%);
      --gradient-dark: linear-gradient(160deg, #1A222D 0%, #0D1117 100%);
      --radius-xl: 24px;
      --radius-md: 16px;
      --radius-sm: 8px;
      --radius-pill: 999px;
      --shadow-soft: 0 16px 40px -12px rgba(15, 23, 42, 0.08);
      --font-mono: "JetBrains Mono", "DIN Alternate", "Roboto Mono", monospace;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.75;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .num-mono {
      font-family: var(--font-mono);
      font-variant-numeric: tabular-nums;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .top-telemetry-bar {
      background-color: #080C10;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .telemetry-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .status-pulse {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #E2E8F0;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--brand-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--brand-green);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { opacity: 0.4; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.15); }
      100% { opacity: 0.4; transform: scale(0.9); }
    }
    .telemetry-contacts {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .main-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    }
    .nav-container {
      height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }
    .brand-icon {
      width: 40px;
      height: 40px;
      background: var(--gradient-brand);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-size: 20px;
      box-shadow: 0 6px 16px rgba(0, 196, 140, 0.35);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-body);
      transition: color 0.2s ease;
      position: relative;
    }
    .nav-links a:hover {
      color: var(--brand-blue);
    }
    .btn-gradient {
      background: var(--gradient-brand);
      color: #FFF;
      font-size: 15px;
      font-weight: 600;
      padding: 12px 24px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 24px rgba(0, 114, 255, 0.25);
      transition: all 0.25s ease;
    }
    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 114, 255, 0.35);
      color: #FFF;
    }
    .btn-outline {
      background: transparent;
      color: var(--text-dark);
      font-size: 15px;
      font-weight: 600;
      padding: 12px 24px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(15, 23, 42, 0.16);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .btn-outline:hover {
      background: var(--card-muted);
      border-color: var(--brand-blue);
      color: var(--brand-blue);
    }
    .data-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 600;
      background: rgba(0, 196, 140, 0.12);
      color: #00875A;
      border: 1px solid rgba(0, 196, 140, 0.2);
    }
    .data-badge.warning {
      background: rgba(255, 82, 56, 0.12);
      color: #D9381E;
      border-color: rgba(255, 82, 56, 0.2);
    }
    .data-badge.blue {
      background: rgba(0, 114, 255, 0.1);
      color: var(--brand-blue);
      border-color: rgba(0, 114, 255, 0.2);
    }
    .data-badge.dark {
      background: rgba(255, 255, 255, 0.1);
      color: #38EF7D;
      border-color: rgba(255, 255, 255, 0.15);
    }
    .section-wrap {
      padding: 96px 0;
      position: relative;
    }
    .section-wrap.dark {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }
    .section-wrap.alt-light {
      background-color: #ECF0F5;
    }
    .section-head {
      margin-bottom: 56px;
      max-width: 780px;
    }
    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      margin: 16px 0 14px;
      letter-spacing: -0.5px;
    }
    .section-wrap.dark .section-title {
      color: #FFF;
    }
    .section-wrap:not(.dark) .section-title {
      color: var(--text-dark);
    }
    .section-desc {
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-muted);
    }
    .section-wrap.dark .section-desc {
      color: #94A3B8;
    }
    .rounded-card {
      background: var(--card-light);
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-soft);
      padding: 36px;
      transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
      position: relative;
    }
    .rounded-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 24px 48px -12px rgba(15, 23, 42, 0.12);
      border-color: rgba(0, 196, 140, 0.4);
    }
    .rounded-card.dark {
      background: var(--card-dark);
      border: 1px solid var(--border-dark);
      color: var(--text-light);
    }
    .rounded-card.dark:hover {
      border-color: rgba(0, 196, 140, 0.5);
      box-shadow: 0 24px 48px -12px rgba(0,0,0,0.5);
    }
    .hero-banner {
      position: relative;
      background: url('/assets/images/98119b7074a26e58.jpg') center center / cover no-repeat;
      padding: 100px 0 120px;
      color: #FFF;
      overflow: hidden;
    }
    .hero-banner::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(13, 17, 23, 0.94) 0%, rgba(13, 17, 23, 0.82) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-search-bar {
      display: flex;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-pill);
      padding: 6px;
      margin: 28px 0 20px;
      backdrop-filter: blur(8px);
    }
    .hero-search-bar input {
      flex: 1;
      background: transparent;
      border: none;
      padding: 12px 20px;
      color: #FFF;
      font-size: 15px;
      outline: none;
    }
    .hero-search-bar input::placeholder {
      color: #CBD5E1;
    }
    .quick-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 13px;
      align-items: center;
      color: #94A3B8;
    }
    .quick-tag-item {
      background: rgba(255, 255, 255, 0.1);
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      color: #FFF;
      border: 1px solid rgba(255, 255, 255, 0.15);
      transition: all 0.2s;
    }
    .quick-tag-item:hover {
      background: var(--brand-green);
      border-color: var(--brand-green);
    }
    .dashboard-preview {
      background: var(--gradient-dark);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: 0 32px 64px rgba(0,0,0,0.4);
    }
    .dash-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 20px;
    }
    .dash-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 18px;
      border-radius: var(--radius-md);
    }
    .dash-val {
      font-size: 28px;
      font-weight: 700;
      color: var(--brand-green);
      margin: 6px 0;
    }
    .bento-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .bento-col-2 {
      grid-column: span 2;
    }
    .matrix-layout {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 36px;
    }
    .matrix-nav-item {
      padding: 18px 24px;
      border-radius: var(--radius-md);
      background: #FFF;
      border: 1px solid var(--border-light);
      margin-bottom: 12px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      transition: all 0.25s;
    }
    .matrix-nav-item.active, .matrix-nav-item:hover {
      border-color: var(--brand-blue);
      background: var(--gradient-brand);
      color: #FFF;
      box-shadow: 0 8px 20px rgba(0, 114, 255, 0.2);
    }
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .metric-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 14px 0;
      border-bottom: 1px dashed rgba(15, 23, 42, 0.12);
    }
    .timeline-container {
      position: relative;
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .timeline-node {
      position: relative;
      padding-top: 36px;
    }
    .timeline-node::before {
      content: "";
      position: absolute;
      top: 10px;
      left: 0;
      width: 100%;
      height: 3px;
      background: rgba(255,255,255,0.15);
      z-index: 1;
    }
    .timeline-node::after {
      content: "";
      position: absolute;
      top: 4px;
      left: 0;
      width: 15px;
      height: 15px;
      border-radius: 50%;
      background: var(--brand-green);
      box-shadow: 0 0 10px var(--brand-green);
      z-index: 2;
    }
    .faq-accordion-item {
      background: #FFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    }
    .faq-header {
      padding: 22px 28px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 17px;
      color: var(--text-dark);
      background: #FFF;
    }
    .faq-header:hover {
      color: var(--brand-blue);
    }
    .faq-body {
      padding: 0 28px 24px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.8;
      display: none;
    }
    .faq-accordion-item.active .faq-body {
      display: block;
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }
    .faq-accordion-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--brand-coral);
    }
    .contact-card-wrap {
      background: var(--gradient-dark);
      border-radius: var(--radius-xl);
      border: 1px solid rgba(255,255,255,0.12);
      padding: 60px 48px;
      color: #FFF;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      box-shadow: 0 32px 64px rgba(0,0,0,0.5);
    }
    .form-input {
      width: 100%;
      padding: 14px 18px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-sm);
      color: #FFF;
      font-size: 15px;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-input:focus {
      border-color: var(--brand-green);
      background: rgba(255, 255, 255, 0.1);
    }
    .site-footer {
      background-color: #080C10;
      color: #94A3B8;
      padding: 80px 0 40px;
      border-top: 1px solid rgba(255,255,255,0.08);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 48px;
      margin-bottom: 60px;
    }
    .footer-title {
      color: #FFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 24px;
    }
    .footer-list {
      list-style: none;
    }
    .footer-list li {
      margin-bottom: 12px;
    }
    .footer-list a:hover {
      color: var(--brand-green);
    }
    .copyright-bar {
      padding-top: 36px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }
    @media (max-width: 1024px) {
      .hero-content, .matrix-layout, .compare-table, .contact-card-wrap {
        grid-template-columns: 1fr;
      }
      .bento-grid {
        grid-template-columns: 1fr 1fr;
      }
      .bento-col-2 {
        grid-column: span 1;
      }
      .timeline-container {
        grid-template-columns: 1fr;
      }
      .timeline-node::before {
        display: none;
      }
      .timeline-node {
        padding-top: 0;
        padding-left: 28px;
      }
      .timeline-node::after {
        left: 0;
        top: 6px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .section-wrap {
        padding: 60px 0;
      }
      .section-title {
        font-size: 26px;
      }
      .nav-links {
        display: none;
      }
      .bento-grid {
        grid-template-columns: 1fr;
      }
      .dash-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .telemetry-contacts {
        display: none;
      }
      .copyright-bar {
        flex-direction: column;
        align-items: flex-start;
      }
    }