/* roulang page: index */
:root {
      --primary: #1A1A2E;
      --accent-gold: #D4AF37;
      --accent-gold-hover: #B8962E;
      --soft-white: #E8E3D9;
      --bg-ivory: #F5F3EF;
      --text-body: #2C2C2C;
      --text-muted: #6B6B6B;
      --border-light: #D9D4CC;
      --success-green: #2E5A3B;
      --white: #FFFFFF;
      --card-radius: 12px;
      --btn-radius: 8px;
      --tag-radius: 4px;
      --shadow-sm: 0 2px 16px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 32px rgba(0,0,0,0.08);
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      --font-sans: 'Noto Sans SC', 'Inter', -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-ivory);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
      font-family: var(--font-sans);
      color: var(--primary);
    }
    h1 {
      font-weight: 700;
      font-size: clamp(2.8rem, 5vw, 4.2rem);
      letter-spacing: -0.02em;
      line-height: 1.15;
      margin-bottom: 1.5rem;
    }
    h2 {
      font-weight: 600;
      font-size: clamp(2rem, 3.5vw, 2.8rem);
      letter-spacing: -0.01em;
      margin-bottom: 3rem;
      text-align: center;
    }
    h3 {
      font-weight: 600;
      font-size: 1.35rem;
      color: var(--primary);
    }
    h4 {
      font-weight: 500;
      font-size: 1.1rem;
      color: var(--primary);
    }
    p {
      color: var(--text-body);
      margin-bottom: 1.2rem;
      max-width: 680px;
      font-weight: 400;
      font-size: 1rem;
    }
    .section-padding {
      padding: 6rem 0;
    }
    @media (max-width: 767px) {
      .section-padding {
        padding: 4rem 0;
      }
      h2 {
        margin-bottom: 2rem;
      }
    }
    .bg-ivory {
      background-color: var(--bg-ivory);
    }
    .bg-white {
      background-color: var(--white);
    }
    .bg-dark {
      background-color: var(--primary);
    }
    .text-gold {
      color: var(--accent-gold);
    }
    .text-muted {
      color: var(--text-muted) !important;
    }
    .btn {
      border-radius: var(--btn-radius);
      font-weight: 600;
      font-size: 0.95rem;
      letter-spacing: 0.04em;
      text-transform: none;
      transition: var(--transition-smooth);
      padding: 0.8rem 2.2rem;
      border: none;
    }
    .btn-primary {
      background-color: var(--accent-gold);
      color: var(--primary);
      border: none;
    }
    .btn-primary:hover, .btn-primary:focus-visible {
      background-color: var(--accent-gold-hover);
      color: var(--primary);
      box-shadow: 0 4px 18px rgba(212,175,55,0.35);
      outline: none;
    }
    .btn-outline-primary {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
    }
    .btn-outline-primary:hover {
      background-color: var(--primary);
      color: var(--bg-ivory);
      border-color: var(--primary);
    }
    .btn-light-ghost {
      background: transparent;
      border: 1px solid var(--border-light);
      color: var(--primary);
    }
    .btn-light-ghost:hover {
      background: var(--primary);
      color: var(--white);
      border-color: var(--primary);
    }
    .text-link {
      color: var(--primary);
      font-weight: 500;
      text-decoration: underline;
      text-decoration-color: var(--accent-gold);
      text-underline-offset: 4px;
      transition: var(--transition-smooth);
    }
    .text-link:hover {
      text-decoration-thickness: 2px;
      color: var(--primary);
    }
    .card {
      border-radius: var(--card-radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition-smooth);
      background: var(--white);
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .navbar-custom {
      background: var(--white);
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
      margin: 1.5rem auto;
      max-width: 1200px;
      padding: 0.8rem 1.5rem;
    }
    .nav-brand {
      font-weight: 700;
      font-size: 1.3rem;
      color: var(--primary);
      text-decoration: none;
    }
    .nav-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: transparent;
      border-radius: 8px;
      padding: 0.5rem 1rem;
      font-weight: 500;
      color: var(--primary);
      transition: var(--transition-smooth);
      text-decoration: none;
      font-size: 0.95rem;
    }
    .nav-pill:hover {
      background: var(--soft-white);
      color: var(--primary);
    }
    @media (max-width: 991px) {
      .navbar-custom {
        flex-wrap: wrap;
        justify-content: center;
        padding: 1rem;
      }
      .nav-actions {
        width: 100%;
        justify-content: center;
        margin-top: 0.8rem;
      }
    }
    .hero-bg {
      background-color: var(--bg-ivory);
      background-image: radial-gradient(circle at 20% 30%, rgba(212,175,55,0.03) 0%, transparent 40%);
      position: relative;
    }
    .hero-image {
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .badge-accent {
      background: rgba(212,175,55,0.08);
      color: var(--accent-gold);
      border-radius: 20px;
      padding: 0.25rem 1rem;
      font-weight: 500;
      display: inline-block;
    }
    .pain-card {
      background: var(--white);
      border-left: 3px solid var(--accent-gold);
      transition: var(--transition-smooth);
    }
    .pain-card:hover {
      transform: translateY(-4px);
    }
    .solution-icon-strip {
      background: var(--soft-white);
      height: 80px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--card-radius) var(--card-radius) 0 0;
    }
    .data-number {
      font-family: 'Inter', sans-serif;
      font-weight: 700;
      font-size: 2.4rem;
      color: var(--accent-gold);
      display: block;
      line-height: 1.2;
    }
    .data-underline {
      width: 40px;
      height: 2px;
      background: var(--accent-gold);
      margin: 0.5rem auto;
    }
    .testimonial-card .bi-quote {
      color: var(--accent-gold);
      font-size: 2rem;
    }
    .accordion-button {
      font-weight: 500;
      color: var(--primary);
      background: var(--white);
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: var(--white);
      color: var(--primary);
      box-shadow: 0 0 0 2px var(--accent-gold);
    }
    .accordion-button:focus {
      box-shadow: 0 0 0 2px var(--accent-gold);
      border-color: transparent;
    }
    .accordion-button::after {
      filter: brightness(0) saturate(0%) invert(55%) sepia(98%) saturate(488%) hue-rotate(9deg) brightness(94%) contrast(86%);
    }
    .accordion-body {
      background: var(--bg-ivory);
      color: var(--text-body);
    }
    .footer {
      background: var(--primary);
      color: #D9D4CC;
    }
    .footer a {
      color: #D9D4CC;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer a:hover {
      color: var(--accent-gold);
    }
    .footer-brand {
      color: var(--accent-gold);
      font-weight: 700;
    }
    .footer-border {
      border-top: 1px solid rgba(217,212,204,0.2);
      padding-top: 1.5rem;
    }
    @media (max-width: 575px) {
      .btn {
        width: 100%;
        text-align: center;
      }
      .hero-cta-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
      }
    }
    .fade-in-up {
      animation: fadeInUp 0.7s ease forwards;
      opacity: 0;
      transform: translateY(18px);
    }
    @keyframes fadeInUp {
      to { opacity: 1; transform: translateY(0); }
    }
    .count-up {
      font-variant-numeric: tabular-nums;
    }
    .scale-hover:hover {
      transform: scale(1.03);
      transition: transform 0.25s ease;
    }