/* roulang page: index */
:root {
      --primary-dark: #0A4D40;
      --primary: #007A64;
      --primary-light: #10B981;
      --dark-obsidian: #0A1118;
      --dark-surface: #0F1720;
      --bg-light: #F7F9FB;
      --bg-white: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-heading: #0F172A;
      --border-color: #E2E8F0;
      --radius: 6px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.04);
      --shadow-hover: 0 14px 28px rgba(0,122,100,0.12);
    }

    * { box-sizing: border-box; }
    body {
      margin: 0;
      padding: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5 {
      color: var(--text-heading);
      font-weight: 700;
      line-height: 1.25;
      margin-top: 0;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.2s ease;
    }
    a:hover { color: var(--primary-light); }

    /* Top Utility Bar */
    .utility-bar {
      background: var(--dark-obsidian);
      color: #94A3B8;
      font-size: 12px;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .utility-bar .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: var(--primary-light);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary-light);
    }

    /* Main Navigation */
    .site-header {
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-container {
      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(--dark-obsidian);
      letter-spacing: -0.5px;
    }
    .brand-logo-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 16px;
    }
    .main-nav ul {
      display: flex;
      margin: 0;
      list-style: none;
      gap: 28px;
    }
    .main-nav a {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      position: relative;
      padding: 6px 0;
    }
    .main-nav a:hover {
      color: var(--primary);
    }
    .btn-nav-cta {
      background: var(--primary);
      color: #fff !important;
      padding: 10px 22px;
      border-radius: var(--radius);
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(0, 122, 100, 0.25);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .btn-nav-cta:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 122, 100, 0.35);
    }

    /* Section Global */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center { text-align: center; }
    .section-eyebrow {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--primary);
      background: rgba(0, 122, 100, 0.08);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      color: var(--text-heading);
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* Hero Section */
    .hero-section {
      background: linear-gradient(rgba(10, 17, 24, 0.88), rgba(10, 17, 24, 0.94)), url('/assets/images/f40b1617e796821e.png') center/cover no-repeat;
      color: #fff;
      padding: 110px 0 90px;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 24px;
      line-height: 1.2;
    }
    .hero-intro {
      font-size: 16px;
      color: #CBD5E1;
      max-width: 780px;
      margin-bottom: 36px;
      line-height: 1.75;
    }
    .hero-btns {
      display: flex;
      gap: 16px;
      margin-bottom: 44px;
      flex-wrap: wrap;
    }
    .btn-solid {
      background: var(--primary-light);
      color: var(--dark-obsidian) !important;
      font-weight: 700;
      padding: 14px 30px;
      border-radius: var(--radius);
      transition: all 0.2s;
    }
    .btn-solid:hover {
      background: #059669;
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid rgba(255,255,255,0.25);
      color: #fff !important;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: var(--radius);
      transition: all 0.2s;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.08);
      border-color: #fff;
    }
    .hero-countdown-strip {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius);
      padding: 16px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      max-width: 860px;
    }
    .countdown-item span {
      display: block;
      font-size: 11px;
      color: #94A3B8;
      text-transform: uppercase;
    }
    .countdown-item strong {
      font-size: 18px;
      color: #fff;
      font-family: monospace;
    }

    /* Cards & Grids */
    .pain-card, .adv-card, .prod-card, .story-card, .review-card, .insight-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      height: 100%;
    }
    .pain-card:hover, .adv-card:hover, .prod-card:hover, .story-card:hover, .insight-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .card-tag {
      font-size: 11px;
      font-weight: 700;
      color: #D97706;
      background: #FEF3C7;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .card-tag.safe {
      color: var(--primary);
      background: #D1FAE5;
    }

    /* Section Highlights */
    .bg-light-stripe { background-color: var(--bg-light); }
    .bg-dark-obsidian {
      background-color: var(--dark-obsidian);
      color: #CBD5E1;
    }
    .bg-dark-obsidian h2, .bg-dark-obsidian h3, .bg-dark-obsidian strong {
      color: #fff;
    }
    .bg-dark-obsidian .section-desc { color: #94A3B8; }

    /* Architecture Box */
    .arch-box {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .arch-box img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* Workflow Pipeline */
    .workflow-step {
      position: relative;
      background: var(--bg-white);
      padding: 24px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      height: 100%;
    }
    .step-number {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary-light);
      margin-bottom: 8px;
      line-height: 1;
    }

    /* Comparison Table / Benchmarks */
    .compare-container {
      background: var(--dark-surface);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius);
      padding: 32px;
    }
    .metric-badge {
      display: inline-block;
      padding: 4px 10px;
      background: rgba(16, 185, 129, 0.15);
      color: var(--primary-light);
      font-weight: 700;
      border-radius: 4px;
      font-size: 12px;
    }

    /* Product Grid Accent */
    .prod-card.featured {
      border: 2px solid var(--primary);
      position: relative;
      box-shadow: var(--shadow-hover);
    }
    .prod-ribbon {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--primary);
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 2px 10px;
      border-radius: 12px;
    }

    /* Metrics Strip */
    .metrics-bar-section {
      background: var(--primary-dark);
      color: #fff;
      padding: 48px 0;
    }
    .metric-item {
      text-align: center;
    }
    .metric-num {
      font-size: 38px;
      font-weight: 900;
      letter-spacing: -1px;
      color: #34D399;
      line-height: 1.1;
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 13px;
      color: #A7F3D0;
      font-weight: 500;
    }

    /* FAQ Accordion Manual Custom */
    .faq-item {
      border-bottom: 1px solid var(--border-color);
      padding: 20px 0;
    }
    .faq-item:first-child { border-top: 1px solid var(--border-color); }
    .faq-question {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-heading);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      margin-top: 10px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Contact Form CTA */
    .cta-box {
      background: linear-gradient(135deg, #0A4D40 0%, #064E3B 100%);
      border-radius: var(--radius);
      padding: 50px 40px;
      color: #fff;
      box-shadow: var(--shadow-md);
    }
    .cta-input {
      background: #FFFFFF !important;
      border: 1px solid #CBD5E1 !important;
      border-radius: var(--radius) !important;
      padding: 12px !important;
      font-size: 14px !important;
      height: 46px !important;
      margin-bottom: 16px !important;
    }
    .cta-submit {
      background: var(--primary-light) !important;
      color: var(--dark-obsidian) !important;
      font-weight: 700 !important;
      border-radius: var(--radius) !important;
      height: 46px !important;
      width: 100%;
      cursor: pointer;
      border: none !important;
      transition: all 0.2s;
    }
    .cta-submit:hover {
      background: #059669 !important;
    }

    /* Footer */
    .site-footer {
      background: #060A0E;
      color: #64748B;
      padding: 60px 0 30px;
      font-size: 13px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-col h5 {
      color: #F8FAFC;
      font-size: 14px;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .footer-col ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-col li { margin-bottom: 8px; }
    .footer-col a { color: #94A3B8; }
    .footer-col a:hover { color: #34D399; }
    .footer-bottom {
      margin-top: 40px;
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.06);
      text-align: center;
      font-size: 12px;
    }

    @media screen and (max-width: 1024px) {
      .hero-h1 { font-size: 34px; }
      .main-nav { display: none; }
    }
    @media screen and (max-width: 640px) {
      .hero-h1 { font-size: 28px; }
      .section-title { font-size: 24px; }
      .hero-countdown-strip { flex-direction: column; align-items: flex-start; }
      .cta-box { padding: 30px 20px; }
    }