/* roulang page: index */
:root {
      --bg-dark: #0B0F14;
      --bg-surface: #111827;
      --bg-card: #16202E;
      --bg-light: #F5F7FA;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #E2E8F0;
      --text-light-muted: #94A3B8;
      --primary: #1A2332;
      --accent: #FF5E1E;
      --accent-hover: #E04E15;
      --cyan: #00D2B4;
      --border-dark: #1E293B;
      --border-light: #E2E8F0;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 30px -10px rgba(0,0,0,0.08);
      --shadow-lg: 0 20px 40px -15px rgba(0,0,0,0.25);
      --font-mono: "JetBrains Mono", "Roboto Mono", Consolas, monospace;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .section-pad {
      padding-top: 88px;
      padding-bottom: 88px;
    }

    .section-title-wrap {
      margin-bottom: 56px;
    }

    .section-title-wrap.center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-kicker {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--accent);
      margin-bottom: 12px;
    }

    .section-kicker.cyan {
      color: var(--cyan);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 26px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      gap: 8px;
    }

    .btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 94, 30, 0.35);
    }

    .btn-primary:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
    }

    .btn-outline:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.08);
    }

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

    .btn-outline-dark:hover {
      border-color: var(--text-main);
      background: var(--bg-light);
    }

    /* Meta Bar */
    .top-meta-bar {
      background: #0B0E14;
      border-bottom: 1px solid rgba(255,255,255,0.06);
      font-size: 12px;
      color: #8C9BAE;
      padding: 8px 0;
    }

    .meta-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .meta-left, .meta-right {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .meta-tag {
      background: rgba(0, 210, 180, 0.12);
      color: var(--cyan);
      padding: 2px 8px;
      border-radius: 2px;
      font-family: var(--font-mono);
      font-size: 11px;
    }

    /* Main Nav */
    .main-nav-wrapper {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.3px;
    }

    .brand-symbol {
      width: 32px;
      height: 32px;
      background: var(--primary);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 18px;
      font-weight: 900;
      border: 1px solid rgba(255, 94, 30, 0.3);
    }

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

    .nav-link {
      font-size: 14px;
      font-weight: 600;
      color: #334155;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--accent);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* Hero */
    .hero-section {
      position: relative;
      background-color: var(--bg-dark);
      background-image: linear-gradient(rgba(11, 15, 20, 0.82), rgba(11, 15, 20, 0.88)), url('/assets/images/a1967fd2cbe46116.webp');
      background-size: cover;
      background-position: center;
      padding: 100px 0 110px;
      color: #FFFFFF;
      border-bottom: 1px solid var(--border-dark);
    }

    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: 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);
      border-radius: 20px;
      padding: 6px 16px;
      font-size: 13px;
      margin-bottom: 24px;
      color: var(--cyan);
      font-family: var(--font-mono);
    }

    .hero-badge span {
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--cyan);
      box-shadow: 0 0 8px var(--cyan);
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 24px;
      letter-spacing: -0.8px;
      color: #FFFFFF;
    }

    .hero-desc {
      font-size: 17px;
      line-height: 1.8;
      color: #B3C2D4;
      margin-bottom: 36px;
    }

    .hero-search-box {
      background: rgba(26, 35, 50, 0.75);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 8px;
      display: flex;
      align-items: center;
      max-width: 620px;
      margin: 0 auto 28px;
      backdrop-filter: blur(8px);
      box-shadow: var(--shadow-lg);
    }

    .hero-search-box input {
      flex: 1;
      background: transparent;
      border: none;
      padding: 12px 18px;
      color: #FFFFFF;
      font-size: 15px;
      outline: none;
    }

    .hero-search-box input::placeholder {
      color: #7A8CA3;
    }

    .hero-tags-bar {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: #94A3B8;
    }

    .hero-tags-bar span {
      color: #64748B;
    }

    .hero-tags-bar a {
      background: rgba(255,255,255,0.06);
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.08);
      color: #CBD5E1;
    }

    .hero-tags-bar a:hover {
      border-color: var(--accent);
      color: #FFFFFF;
    }

    /* Painpoints */
    .painpoints-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
      border-top: 3px solid #CBD5E1;
      transition: all 0.3s ease;
    }

    .pain-card:hover {
      transform: translateY(-4px);
      border-top-color: var(--accent);
      box-shadow: var(--shadow-md);
    }

    .pain-index {
      font-family: var(--font-mono);
      font-size: 14px;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 12px;
    }

    .pain-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--primary);
    }

    .pain-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* About Section */
    .about-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .about-media {
      position: relative;
    }

    .about-media img {
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-light);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .about-spec-badge {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: var(--bg-dark);
      border: 1px solid var(--border-dark);
      border-left: 3px solid var(--cyan);
      color: #FFFFFF;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      box-shadow: var(--shadow-md);
    }

    .about-text-content p {
      margin-bottom: 20px;
      font-size: 15px;
      color: #475569;
      line-height: 1.75;
    }

    .compliance-pill-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .compliance-pill {
      background: var(--bg-light);
      border: 1px solid var(--border-light);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* Features Grid (6) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-box {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .feature-box:hover {
      border-color: #94A3B8;
      box-shadow: var(--shadow-md);
    }

    .feature-icon-code {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--accent);
      background: rgba(255, 94, 30, 0.08);
      display: inline-block;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 18px;
      font-weight: 700;
    }

    .feature-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Products Matrix */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }

    .product-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }

    .product-thumb {
      height: 220px;
      overflow: hidden;
      position: relative;
      background: #E2E8F0;
    }

    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .product-card:hover .product-thumb img {
      transform: scale(1.05);
    }

    .product-model-chip {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(11, 15, 20, 0.85);
      color: #FFFFFF;
      font-family: var(--font-mono);
      font-size: 12px;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--accent);
    }

    .product-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .product-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .product-intro {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .product-specs {
      background: var(--bg-light);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      margin-bottom: 20px;
      font-size: 13px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .spec-item {
      display: flex;
      flex-direction: column;
    }

    .spec-k {
      font-size: 11px;
      color: var(--text-muted);
    }

    .spec-v {
      font-family: var(--font-mono);
      font-weight: 700;
      color: var(--primary);
    }

    .product-action {
      margin-top: auto;
    }

    /* Deep Tech Section (Dark) */
    .deep-tech-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }

    .deep-tech-layout {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 56px;
      align-items: center;
    }

    .tech-step-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 32px;
    }

    .tech-step-item {
      display: flex;
      gap: 16px;
      background: var(--bg-surface);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 18px 20px;
    }

    .tech-step-num {
      font-family: var(--font-mono);
      font-size: 18px;
      font-weight: 800;
      color: var(--cyan);
    }

    .tech-step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #F8FAFC;
    }

    .tech-step-text {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }

    .tech-visual-board {
      background: var(--bg-surface);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .board-header {
      background: #1A2332;
      padding: 12px 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-family: var(--font-mono);
      font-size: 12px;
      color: #94A3B8;
      border-bottom: 1px solid var(--border-dark);
    }

    .board-status {
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--cyan);
    }

    .board-status-dot {
      width: 8px;
      height: 8px;
      background: var(--cyan);
      border-radius: 50%;
    }

    /* Cases */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-media {
      height: 200px;
      background: #CBD5E1;
      overflow: hidden;
    }

    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-body {
      padding: 24px;
    }

    .case-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 8px;
    }

    .case-heading {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--primary);
    }

    .case-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .case-stat-badge {
      border-top: 1px solid var(--border-light);
      padding-top: 14px;
      display: flex;
      justify-content: space-between;
      font-size: 13px;
    }

    .case-stat-badge span:first-child {
      color: var(--text-muted);
    }

    .case-stat-badge span:last-child {
      font-weight: 700;
      color: var(--primary);
      font-family: var(--font-mono);
    }

    /* Metrics Bar */
    .metrics-section {
      background: #111827;
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .metric-value {
      font-family: var(--font-mono);
      font-size: 40px;
      font-weight: 900;
      color: var(--cyan);
      margin-bottom: 6px;
      letter-spacing: -1px;
    }

    .metric-label {
      font-size: 14px;
      font-weight: 600;
      color: #CBD5E1;
      margin-bottom: 4px;
    }

    .metric-sub {
      font-size: 12px;
      color: #64748B;
    }

    /* Testimonials */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .quote-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .quote-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 24px;
      position: relative;
    }

    .client-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-light);
      padding-top: 16px;
    }

    .client-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--primary);
      border: 1px solid var(--border-light);
      font-size: 14px;
    }

    .client-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--primary);
    }

    .client-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* News */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--accent);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .news-excerpt {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      flex: 1;
    }

    .news-link-btn {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .news-link-btn:hover {
      color: var(--accent);
    }

    /* FAQ Handled by Native Details */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      background: #FFFFFF;
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-item summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.2s ease;
    }

    .faq-item[open] summary::after {
      transform: rotate(45deg);
      color: var(--accent);
    }

    .faq-content {
      padding: 0 24px 22px;
      font-size: 14px;
      color: #475569;
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
    }

    /* CTA Section */
    .cta-banner {
      background: linear-gradient(135deg, #111827 0%, #0B0F14 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      border: 1px solid var(--border-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 40px;
    }

    .cta-left {
      max-width: 600px;
    }

    .cta-left h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 14px;
      color: #FFFFFF;
    }

    .cta-left p {
      font-size: 15px;
      color: #94A3B8;
      line-height: 1.7;
    }

    .cta-actions {
      display: flex;
      flex-direction: column;
      gap: 12px;
      min-width: 260px;
    }

    /* Footer */
    .site-footer {
      background: #0B0F14;
      color: #8C9BAE;
      padding-top: 72px;
      border-top: 1px solid var(--border-dark);
      font-size: 13px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: -0.2px;
    }

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

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

    .footer-desc {
      line-height: 1.7;
      margin-top: 14px;
      color: #64748B;
    }

    .footer-contact-item {
      display: flex;
      gap: 10px;
      margin-bottom: 12px;
    }

    .footer-contact-item strong {
      color: #CBD5E1;
      min-width: 70px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 24px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .painpoints-grid, .features-grid, .product-grid, .cases-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
      }
      .about-split, .deep-tech-layout {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .cta-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 768px) {
      .top-meta-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .hero-title {
        font-size: 32px;
      }
      .painpoints-grid, .features-grid, .product-grid, .cases-grid, .testimonial-grid, .news-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .hero-search-box {
        flex-direction: column;
      }
      .hero-search-box button {
        width: 100%;
        margin-top: 8px;
      }
    }