/* roulang page: index */
/* Custom CSS variables & base */
    :root {
      --color-primary: #1B3A2D;
      --color-primary-light: #2C5A42;
      --color-accent: #F15A24;
      --color-bg: #F7F5F0;
      --color-bg-alt: #E8EDE9;
      --color-text: #2D3A30;
      --color-text-light: #5A6B5E;
      --color-bamboo: #7BA686;
      --color-footer: #0F231B;
      --font-heading: 'Noto Sans SC', sans-serif;
      --font-body: 'Noto Sans SC', sans-serif;
      --font-number: 'Inter', sans-serif;
      --radius-card: 16px;
      --radius-btn: 12px;
      --shadow-card: 0 4px 20px rgba(27, 58, 45, 0.08);
      --shadow-hover: 0 8px 30px rgba(27, 58, 45, 0.15);
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--color-bg);
      color: var(--color-text);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    
    @media (max-width: 768px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
    }
    
    /* Navigation active style */
    .nav-link.active {
      color: var(--color-accent);
      border-bottom: 2px solid var(--color-accent);
    }
    
    /* Animation for scroll reveal */
    .reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    
    /* FAQ accordion */
    .faq-item .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
    }
    .faq-item .faq-icon {
      transition: transform 0.3s ease;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    
    /* masonry fallback for cases */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    @media (max-width: 1024px) {
      .masonry-grid {
        column-count: 2;
      }
    }
    @media (max-width: 640px) {
      .masonry-grid {
        column-count: 1;
      }
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
    }
    
    /* decorative bamboo lines */
    .bg-pattern {
      background-image: radial-gradient(circle at 20% 30%, rgba(123,166,134,0.08) 2px, transparent 2px);
      background-size: 40px 40px;
    }