/* roulang page: index */
:root {
      --primary: #F15A24;
      --primary-hover: #D94A1A;
      --dark: #1E1E1E;
      --light: #F9F9F9;
      --purple: #3D2B56;
      --text-muted: #6B6B6B;
      --border-light: #E0E0E0;
      --success: #0E8C3A;
      --danger: #C0392B;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-number: "DIN Alternate", "Roboto", "Helvetica Neue", sans-serif;
      --radius-xl: 16px;
      --radius-lg: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.12);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--light);
      color: var(--dark);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    h1 {
      font-size: 3rem;
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: 2.2rem;
    }
    h3 {
      font-size: 1.5rem;
      font-weight: 600;
    }
    .number-font {
      font-family: var(--font-number);
    }
    .text-muted-custom {
      color: var(--text-muted);
    }
    .bg-dark-custom {
      background-color: var(--dark);
    }
    .bg-light-custom {
      background-color: var(--light);
    }
    .btn-primary-custom {
      background-color: var(--primary);
      border: none;
      color: white;
      border-radius: 40px;
      padding: 14px 36px;
      font-weight: 600;
      transition: all 0.3s ease;
      box-shadow: 0 4px 12px rgba(241,90,36,0.3);
    }
    .btn-primary-custom:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 8px 20px rgba(241,90,36,0.5);
      transform: translateY(-2px);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: 40px;
      padding: 12px 32px;
      font-weight: 600;
      transition: all 0.3s ease;
    }
    .btn-outline-custom:hover {
      background-color: var(--primary);
      color: white;
      border-color: var(--primary);
    }
    .nav-capsule {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 90vw;
      background: rgba(30,30,30,0.85);
      backdrop-filter: blur(12px);
      border-radius: 50px;
      padding: 8px 28px;
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    }
    .nav-brand {
      color: var(--primary);
      font-weight: 700;
      font-size: 1.4rem;
      text-decoration: none;
      letter-spacing: 0.5px;
    }
    .nav-link-custom {
      color: rgba(255,255,255,0.85);
      margin: 0 10px;
      font-weight: 500;
      text-decoration: none;
      transition: 0.2s;
      font-size: 0.95rem;
    }
    .nav-link-custom:hover {
      color: var(--primary);
    }
    .nav-link-custom.active {
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
      padding-bottom: 4px;
    }
    .hero-section {
      min-height: 100vh;
      background-color: var(--dark);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    .hero-bg-lines {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(15deg, rgba(241,90,36,0.08) 0%, transparent 40%);
      pointer-events: none;
    }
    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      animation: bounce 2s infinite;
      color: var(--primary);
      font-size: 1.8rem;
    }
    @keyframes bounce {
      0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
      40% { transform: translateX(-50%) translateY(-10px); }
      60% { transform: translateX(-50%) translateY(-4px); }
    }
    .card-pain {
      background: white;
      border-radius: var(--radius-sm);
      padding: 24px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s;
    }
    .card-pain:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .asymmetric-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.9fr 0.9fr;
      gap: 24px;
    }
    .solution-img {
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-light);
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .results-dashboard {
      background: linear-gradient(135deg, var(--purple) 0%, var(--dark) 100%);
      border-radius: var(--radius-xl);
      padding: 60px 40px;
    }
    .testimonial-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 20px;
      scrollbar-width: thin;
    }
    .testimonial-card {
      min-width: 300px;
      background: white;
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--primary);
      transition: 0.3s;
    }
    .accordion-custom .accordion-button {
      background-color: white;
      box-shadow: none;
      font-weight: 600;
      border-radius: var(--radius-sm) !important;
      color: var(--dark);
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary);
      background-color: white;
      box-shadow: none;
    }
    .accordion-custom .accordion-item {
      border: none;
      margin-bottom: 12px;
    }
    .footer-link {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      transition: 0.2s;
    }
    .footer-link:hover {
      color: var(--primary);
    }
    @media (max-width: 992px) {
      h1 { font-size: 2.4rem; }
      h2 { font-size: 1.9rem; }
      .asymmetric-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-capsule {
        width: 94%;
        padding: 8px 16px;
      }
      .nav-link-custom {
        margin: 0 6px;
        font-size: 0.85rem;
      }
    }
    @media (max-width: 768px) {
      .asymmetric-grid {
        grid-template-columns: 1fr;
      }
      .nav-capsule {
        flex-wrap: wrap;
        justify-content: center;
      }
      .testimonial-scroll {
        flex-direction: column;
      }
    }