/* roulang page: index */
:root {
      --primary-start: #FF4D2D;
      --primary-end: #FF7A45;
      --navy-dark: #0B132B;
      --navy-light: #1C2541;
      --text-main: #0F172A;
      --text-muted: #475569;
      --bg-soft: #F8FAFC;
      --bg-alt: #F1F5F9;
      --card-radius: 16px;
      --card-radius-lg: 24px;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-soft);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      overflow-x: hidden;
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(11, 19, 43, 0.92) 0%, rgba(28, 37, 65, 0.88) 100%);
    }
    .brand-gradient-btn {
      background: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .brand-gradient-btn:hover {
      box-shadow: 0 10px 25px rgba(255, 77, 45, 0.35);
      transform: translateY(-2px);
    }
    .card-elevated {
      border: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
      transition: all 0.3s ease;
    }
    .card-elevated:hover {
      transform: translateY(-4px);
      box-shadow: 0 14px 30px rgba(255, 77, 45, 0.12);
      border-color: rgba(255, 122, 69, 0.3);
    }
    .dark-card-elevated {
      background: rgba(28, 37, 65, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(12px);
      transition: all 0.3s ease;
    }
    .dark-card-elevated:hover {
      border-color: rgba(255, 77, 45, 0.5);
      box-shadow: 0 10px 30px rgba(255, 77, 45, 0.2);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-item.active .faq-answer {
      max-height: 240px;
    }
    .faq-item.active .faq-chevron {
      transform: rotate(180deg);
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    }