/* roulang page: index */
:root {
      --primary: #0F766E;
      --primary-dark: #115E59;
      --accent: #D97706;
      --obsidian: #0F172A;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-soft: 0 10px 25px -5px rgba(15, 118, 110, 0.08), 0 8px 10px -6px rgba(15, 118, 110, 0.05);
      --shadow-hover: 0 20px 30px -10px rgba(15, 23, 42, 0.12), 0 10px 15px -5px rgba(15, 118, 110, 0.08);
    }
    body {
      color: #334155;
      background-color: #F8FAFC;
      line-height: 1.7;
    }
    .custom-section {
      padding-top: 5.5rem;
      padding-bottom: 5.5rem;
    }
    .card-elevated {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-soft);
      transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-elevated:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .badge-chip {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.75rem;
      border-radius: 9999px;
      font-size: 0.8125rem;
      font-weight: 600;
    }
    /* Short Video Style Mockup Frame */
    .vertical-screen-box {
      aspect-ratio: 9/16;
      border-radius: 32px;
      overflow: hidden;
      box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.35);
      border: 6px solid #1E293B;
      position: relative;
    }
    details summary::-webkit-details-marker {
      display: none;
    }