/* roulang page: index */
:root {
      --primary-color: #00D084;
      --primary-hover: #00b371;
      --accent-blue: #3B82F6;
      --dark-slate: #0F141C;
      --darker-slate: #090D14;
      --card-bg-dark: #161F2C;
      --text-main-light: #F8FAFC;
      --text-sub-light: #94A3B8;
      --text-main-dark: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --bg-light-1: #F8FAFC;
      --bg-light-2: #FFFFFF;
      --border-color: rgba(148, 163, 184, 0.18);
      --box-shadow-soft: 0 10px 30px -5px rgba(15, 23, 42, 0.08);
      --box-shadow-hover: 0 16px 36px -4px rgba(15, 23, 42, 0.14);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-light-1);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* Command Bar Nav */
    .top-system-bar {
      background-color: var(--darker-slate);
      color: var(--text-sub-light);
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 6px 0;
    }
    .status-pulse {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--primary-color);
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 8px var(--primary-color);
    }
    .main-command-nav {
      background: rgba(15, 20, 28, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      position: sticky;
      top: 0;
      z-index: 1030;
      padding: 12px 0;
    }
    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--text-main-light);
      letter-spacing: -0.5px;
    }
    .brand-logo-wrap svg {
      width: 28px;
      height: 28px;
      fill: var(--primary-color);
    }
    .nav-command-links .nav-link {
      color: #CBD5E1;
      font-size: 0.9375rem;
      font-weight: 500;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
    }
    .nav-command-links .nav-link:hover,
    .nav-command-links .nav-link.active {
      color: var(--primary-color);
      background-color: rgba(255, 255, 255, 0.04);
    }
    .command-search-btn {
      background-color: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: var(--text-sub-light);
      border-radius: 8px;
      padding: 6px 12px;
      font-size: 0.8125rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .command-key-tag {
      background: rgba(255, 255, 255, 0.12);
      border-radius: 4px;
      padding: 2px 6px;
      font-size: 0.7rem;
      color: #E2E8F0;
    }
    .btn-main-pulse {
      background-color: var(--primary-color);
      color: #052115;
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
    }
    .btn-main-pulse:hover {
      background-color: var(--primary-hover);
      color: #02140c;
      transform: translateY(-1px);
    }
    .btn-secondary-outline {
      background-color: transparent;
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: var(--text-main-light);
      font-weight: 500;
      font-size: 0.9375rem;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      min-height: 42px;
      display: inline-flex;
      align-items: center;
    }
    .btn-secondary-outline:hover {
      background-color: rgba(255, 255, 255, 0.08);
      border-color: #CBD5E1;
      color: #FFFFFF;
    }
    /* Section Common Styles */
    .content-section {
      padding: 72px 0;
      position: relative;
    }
    .section-title-wrap {
      margin-bottom: 48px;
    }
    .section-tag-badge {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 208, 132, 0.12);
      color: #008753;
      border-radius: 20px;
      font-size: 0.8125rem;
      font-weight: 600;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-tag-badge.dark-mode {
      background: rgba(0, 208, 132, 0.15);
      color: var(--primary-color);
    }
    .section-h2 {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main-dark);
      letter-spacing: -0.5px;
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-h2.dark-mode {
      color: var(--text-main-light);
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 760px;
      line-height: 1.8;
      margin: 0 auto;
    }
    .section-desc.dark-mode {
      color: var(--text-sub-light);
    }
    /* Hero Carousel */
    .hero-carousel-wrap {
      background-color: var(--dark-slate);
      color: var(--text-main-light);
      position: relative;
      overflow: hidden;
    }
    .hero-slide-item {
      min-height: 600px;
      padding: 90px 0;
      display: flex;
      align-items: center;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-overlay-mask {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(9, 13, 20, 0.94) 20%, rgba(15, 20, 28, 0.84) 60%, rgba(15, 20, 28, 0.92) 100%);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }
    .hero-h1 span {
      color: var(--primary-color);
    }
    .hero-intro {
      font-size: 1.0625rem;
      color: #94A3B8;
      line-height: 1.85;
      margin-bottom: 32px;
      max-width: 680px;
    }
    .hero-metrics-pill {
      display: inline-flex;
      align-items: center;
      gap: 16px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.875rem;
      color: #CBD5E1;
      margin-top: 24px;
    }
    /* Section 2: Pain Points */
    .pain-metric-box {
      border-left: 3px solid var(--primary-color);
      padding-left: 16px;
      margin-top: 24px;
      background: rgba(0, 208, 132, 0.04);
      padding-top: 10px;
      padding-bottom: 10px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }
    .pain-point-list {
      list-style: none;
      padding: 0;
      margin: 20px 0;
    }
    .pain-point-list li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 12px;
      font-size: 0.95rem;
      color: var(--text-body);
    }
    .pain-point-list li::before {
      content: "✕";
      position: absolute;
      left: 0;
      top: 0;
      color: #EF4444;
      font-weight: bold;
    }
    /* Section 3: Tech Grid */
    .feature-card-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      height: 100%;
      box-shadow: var(--box-shadow-soft);
      transition: all 0.25s ease;
    }
    .feature-card-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--box-shadow-hover);
      border-color: rgba(0, 208, 132, 0.4);
    }
    .feature-icon-badge {
      width: 48px;
      height: 48px;
      background: rgba(0, 208, 132, 0.12);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #008753;
      margin-bottom: 20px;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .feature-card-title {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main-dark);
      margin-bottom: 10px;
    }
    .feature-card-text {
      font-size: 0.9125rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    /* Section 4: Products */
    .product-tier-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      height: 100%;
      position: relative;
      display: flex;
      flex-direction: column;
      box-shadow: var(--box-shadow-soft);
      transition: all 0.3s ease;
    }
    .product-tier-card.highlight-card {
      border: 2px solid var(--primary-color);
      box-shadow: 0 16px 40px -6px rgba(0, 208, 132, 0.18);
      transform: scale(1.02);
    }
    .product-top-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary-color);
      color: #052115;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 20px;
    }
    .product-feature-ul {
      list-style: none;
      padding: 0;
      margin: 24px 0;
      flex-grow: 1;
    }
    .product-feature-ul li {
      padding-left: 24px;
      position: relative;
      margin-bottom: 10px;
      font-size: 0.925rem;
      color: var(--text-body);
    }
    .product-feature-ul li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: #008753;
      font-weight: bold;
    }
    /* Section 5: Workflow */
    .workflow-section {
      background-color: var(--dark-slate);
      color: var(--text-main-light);
    }
    .workflow-step-node {
      background: var(--card-bg-dark);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      position: relative;
      height: 100%;
    }
    .step-num-digit {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1;
      margin-bottom: 12px;
      opacity: 0.9;
    }
    /* Section 6: Audiences */
    .audience-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      height: 100%;
      transition: all 0.25s ease;
    }
    .audience-card:hover {
      border-color: var(--accent-blue);
      box-shadow: var(--box-shadow-hover);
    }
    /* Section 7: Case Study */
    .case-narrative-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--box-shadow-soft);
    }
    /* Section 8: Stat Bar */
    .stats-metric-strip {
      background: linear-gradient(135deg, var(--darker-slate) 0%, var(--dark-slate) 100%);
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .stat-metric-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1.1;
      margin-bottom: 6px;
      letter-spacing: -1px;
    }
    .stat-metric-label {
      font-size: 0.9375rem;
      color: var(--text-sub-light);
    }
    /* Section 9: Testimonials */
    .quote-box-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      height: 100%;
      box-shadow: var(--box-shadow-soft);
    }
    .quote-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 12px;
    }
    /* Section 10: News */
    .insight-news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 100%;
      box-shadow: var(--box-shadow-soft);
      display: flex;
      flex-direction: column;
    }
    .insight-news-card .card-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    /* Section 11: FAQ */
    .faq-accordion .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm) !important;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-accordion .accordion-button {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main-dark);
      padding: 18px 24px;
      background: #FFFFFF;
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      color: #008753;
      background: rgba(0, 208, 132, 0.05);
      box-shadow: none;
    }
    .faq-accordion .accordion-body {
      padding: 20px 24px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.8;
      background: #FFFFFF;
    }
    /* Section 12: CTA */
    .cta-card-wrapper {
      background: linear-gradient(135deg, var(--dark-slate) 0%, #151e2b 100%);
      border: 1px solid rgba(0, 208, 132, 0.25);
      border-radius: var(--radius-lg);
      padding: 56px 40px;
      color: #FFFFFF;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    }
    .cta-inline-form {
      max-width: 540px;
      margin: 28px auto 0;
      display: flex;
      gap: 12px;
    }
    .cta-input-control {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFFFFF;
      padding: 10px 18px;
      border-radius: var(--radius-sm);
      flex-grow: 1;
      font-size: 0.9375rem;
    }
    .cta-input-control:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 2px rgba(0, 208, 132, 0.25);
    }
    /* Footer */
    .site-footer-dark {
      background-color: var(--darker-slate);
      color: #94A3B8;
      font-size: 0.875rem;
      padding-top: 64px;
      padding-bottom: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-col-title {
      font-size: 0.9375rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
    }
    .footer-links-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list a:hover {
      color: var(--primary-color);
    }
    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      margin-top: 48px;
      font-size: 0.8125rem;
      color: #64748B;
    }
    @media (max-width: 767.98px) {
      .hero-slide-item {
        min-height: 520px;
        padding: 60px 0;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .section-h2 {
        font-size: 1.65rem;
      }
      .cta-inline-form {
        flex-direction: column;
      }
      .stat-metric-number {
        font-size: 2.2rem;
      }
    }