/* roulang page: index */
:root {
      --bg-dark: #0A0D14;
      --bg-card: #121824;
      --bg-card-alt: #162030;
      --primary: #00FF9D;
      --primary-hover: #00e58c;
      --secondary: #7B61FF;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --text-dim: #475569;
      --border-color: rgba(0, 255, 157, 0.15);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-mono: "SF Mono", "Consolas", monospace;
      --max-width: 1280px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-sans);
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-muted);
      line-height: 1.6;
      font-size: 0.95rem;
      overflow-x: hidden;
      background-image: radial-gradient(circle at 50% 0%, rgba(123, 97, 255, 0.08) 0%, transparent 60%),
                        radial-gradient(circle at 100% 50%, rgba(0, 255, 157, 0.04) 0%, transparent 40%);
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 6px;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 32px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(12px);
      background-color: rgba(10, 13, 20, 0.88);
      border-bottom: 1px solid var(--border-subtle);
    }

    .top-bar {
      height: 36px;
      background-color: #06080d;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.8rem;
      display: flex;
      align-items: center;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--text-muted);
    }

    .status-dot {
      width: 7px;
      height: 7px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 0.6; }
      50% { opacity: 1; }
      100% { opacity: 0.6; }
    }

    .top-links {
      display: flex;
      gap: 16px;
      color: var(--text-dim);
    }

    .top-links a:hover {
      color: var(--text-main);
    }

    .main-nav {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-logo-mark {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0A0D14;
      font-weight: 900;
      font-size: 1rem;
    }

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

    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 24px;
      border-radius: 6px;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid transparent;
      min-height: 44px;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #0A0D14;
      box-shadow: 0 0 16px rgba(0, 255, 157, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 0 24px rgba(0, 255, 157, 0.45);
      transform: translateY(-1px);
    }

    .btn-outline {
      background-color: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }

    .btn-outline:hover {
      background-color: rgba(0, 255, 157, 0.05);
      border-color: var(--primary);
      color: var(--primary);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-main);
      font-size: 1.5rem;
      cursor: pointer;
    }

    section {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: rgba(18, 24, 36, 0.4);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 8px;
      font-family: var(--font-mono);
    }

    .section-title {
      font-size: clamp(1.75rem, 3.5vw, 2.5rem);
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 12px;
    }

    .section-desc {
      max-width: 760px;
      color: var(--text-muted);
      font-size: 1rem;
      line-height: 1.6;
    }

    .hero-section {
      padding: 100px 0 80px;
      position: relative;
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--border-subtle);
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 13, 20, 0.85) 0%, rgba(10, 13, 20, 0.98) 100%);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }

    .hero-h1 {
      font-size: clamp(2.2rem, 5vw, 3.6rem);
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.15;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1 span {
      background: linear-gradient(120deg, var(--primary) 0%, #a855f7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.1rem;
      color: #cbd5e1;
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-checks {
      display: flex;
      flex-wrap: wrap;
      gap: 16px 28px;
      margin-bottom: 36px;
      padding: 16px 20px;
      background: rgba(18, 24, 36, 0.6);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      width: fit-content;
    }

    .hero-check-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      color: var(--text-main);
      font-weight: 500;
    }

    .hero-check-item svg {
      width: 16px;
      height: 16px;
      color: var(--primary);
    }

    .hero-cta {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .metric-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      padding: 24px;
      position: relative;
      overflow: hidden;
    }

    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--primary);
    }

    .metric-value {
      font-family: var(--font-mono);
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }

    .metric-unit {
      font-size: 0.9rem;
      color: var(--primary);
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .metric-trend {
      font-size: 0.75rem;
      font-family: var(--font-mono);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: rgba(0, 255, 157, 0.1);
      padding: 2px 6px;
      border-radius: 3px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .insights-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      padding: 28px;
      margin-bottom: 16px;
    }

    .insights-title {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .insights-desc {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .compliance-box {
      margin-top: 24px;
      padding: 16px 20px;
      background: rgba(123, 97, 255, 0.08);
      border: 1px solid rgba(123, 97, 255, 0.2);
      border-radius: 6px;
      font-size: 0.85rem;
      color: #cbd5e1;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      padding: 28px;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
    }

    .feature-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: 0 0 20px rgba(0, 255, 157, 0.12);
    }

    .feature-icon {
      width: 44px;
      height: 44px;
      border-radius: 6px;
      background: rgba(0, 255, 157, 0.1);
      border: 1px solid rgba(0, 255, 157, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 18px;
      font-size: 1.25rem;
    }

    .feature-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .solution-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }

    .solution-card:hover {
      border-color: var(--primary);
      box-shadow: 0 0 20px rgba(0, 255, 157, 0.1);
    }

    .solution-header {
      padding: 24px;
      border-bottom: 1px solid var(--border-subtle);
      background: var(--bg-card-alt);
    }

    .solution-body {
      padding: 24px;
      flex: 1;
    }

    .solution-meta {
      font-family: var(--font-mono);
      font-size: 0.8rem;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .solution-title {
      font-size: 1.25rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .solution-points {
      list-style: none;
      margin: 16px 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .solution-points li {
      font-size: 0.9rem;
      color: var(--text-muted);
      display: flex;
      align-items: flex-start;
      gap: 8px;
    }

    .solution-points li svg {
      width: 14px;
      height: 14px;
      color: var(--primary);
      flex-shrink: 0;
      margin-top: 4px;
    }

    .pipeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 36px;
    }

    .pipeline-step {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      padding: 24px;
      position: relative;
    }

    .pipeline-step-num {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--secondary);
      font-weight: 700;
      margin-bottom: 12px;
      display: block;
    }

    .pipeline-step-title {
      font-size: 1.05rem;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .pipeline-step-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 24px;
      background: var(--bg-card);
      border-radius: 6px;
      overflow: hidden;
      border: 1px solid var(--border-subtle);
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      text-align: left;
      font-size: 0.9rem;
      border-bottom: 1px solid var(--border-subtle);
    }

    .compare-table th {
      background-color: var(--bg-card-alt);
      color: var(--text-main);
      font-weight: 600;
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table .highlight {
      color: var(--primary);
      font-weight: 600;
    }

    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testimonial-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 0.92rem;
      color: #cbd5e1;
      margin-bottom: 20px;
      font-style: normal;
      line-height: 1.6;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
    }

    .author-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--bg-card-alt);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      font-size: 0.85rem;
    }

    .author-meta {
      font-size: 0.85rem;
    }

    .author-name {
      color: var(--text-main);
      font-weight: 600;
    }

    .author-title {
      color: var(--text-dim);
      font-size: 0.75rem;
    }

    .persona-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .persona-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      padding: 24px;
    }

    .persona-role {
      font-size: 1.05rem;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .persona-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 14px;
    }

    .persona-tag {
      font-size: 0.7rem;
      padding: 2px 8px;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 3px;
      color: var(--text-muted);
    }

    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .news-img {
      height: 180px;
      overflow: hidden;
    }

    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

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

    .news-content {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .news-date {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .news-title {
      font-size: 1.05rem;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .news-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .accordion-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 900px;
      margin: 0 auto;
    }

    .accordion-item {
      background-color: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      overflow: hidden;
    }

    .accordion-header {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      font-weight: 600;
      color: var(--text-main);
      font-size: 1rem;
      transition: color 0.2s ease;
    }

    .accordion-header:hover {
      color: var(--primary);
    }

    .accordion-arrow {
      transition: transform 0.3s ease;
      color: var(--text-muted);
    }

    .accordion-item.open .accordion-arrow {
      transform: rotate(180deg);
      color: var(--primary);
    }

    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .accordion-item.open .accordion-content {
      max-height: 300px;
      padding-bottom: 20px;
      transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
    }

    .cta-box {
      background: linear-gradient(135deg, rgba(18, 24, 36, 0.95) 0%, rgba(10, 13, 20, 0.95) 100%);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 60px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: 0 0 40px rgba(0, 255, 157, 0.06);
    }

    .cta-box::before {
      content: "";
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, rgba(0, 255, 157, 0.08) 0%, transparent 60%);
      pointer-events: none;
    }

    .site-footer {
      background-color: #06080d;
      border-top: 1px solid var(--border-subtle);
      padding: 64px 0 32px;
      font-size: 0.85rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-col-title {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 8px;
      color: var(--text-muted);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      color: var(--text-dim);
    }

    @media (max-width: 1024px) {
      .metrics-bar-grid,
      .pipeline-grid,
      .persona-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3,
      .testimonials-grid,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: var(--bg-dark);
        border-bottom: 1px solid var(--border-subtle);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
      }
      .nav-links.active {
        display: flex;
      }
      .grid-2,
      .grid-3,
      .metrics-bar-grid,
      .pipeline-grid,
      .testimonials-grid,
      .persona-grid,
      .news-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      section {
        padding: 48px 0;
      }
      .cta-box {
        padding: 36px 20px;
      }
    }