:root{
    --bg: #f7f8fa;
    --card: #ffffff;
    --accent: #2563eb;
    --muted: #6b7280;
    --radius: 12px;
    --shadow: 0 6px 18px rgba(16,24,40,0.08);
    --duration: 360ms;
  }

  .accordion{
    width: 100%;
    margin: 0 auto;
    background: var(--card);
    border-radius: var(--radius);
    /* box-shadow: var(--shadow); */
    overflow: hidden;
  }

  .accordion h1{
    font-size: 1.4rem;
    margin: 0 0 18px;
    letter-spacing: -0.02em;
  }

  .accordion-item + .accordion-item { border-top: 1px solid #eef2ff; }

  .accordion-item-header {
    display:flex;
    align-items:center;
    justify-content: space-between;
    gap: 12px;
    width:100%;
    padding: 6px 12px;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: 1.2rem;
    color: #071133;
    border-radius: 0;
    border-bottom: 1px solid #ddd;
  }

  .accordion-item-title {
    display:flex;
    flex-direction:column;
    gap:4px;
  }
  .accordion-item-title .accordion-title-main{
    font-size: 1.2rem;
}
  .accordion-item-title .accordion-title-sub{ font-size: 0.86rem; color: var(--muted); }

  .accordion-chev{
    width: 36px;
    height: 36px;
    display:inline-grid;
    place-items:center;
    border-radius: 10px;
    transition: transform var(--duration) cubic-bezier(.2,.9,.2,1);
    flex: 0 0 36px;
  }
  .accordion-chev svg{ 
    transform-origin: center;
    transition: transform var(--duration) cubic-bezier(.2,.9,.2,1);
  }

  .accordion-panel {
    overflow: hidden;
    transition: max-height var(--duration) cubic-bezier(.2,.9,.2,1), padding var(--duration) cubic-bezier(.2,.9,.2,1);
    max-height: 0;
    padding: 0 12px;
  }

  .accordion-panel-inner{
    padding: 14px 0 18px;
    border-radius: 8px;
    background: linear-gradient(180deg, rgba(245,247,255,0.6), transparent);
  }

  .accordion-item[aria-expanded="true"] .accordion-panel{
    padding: 0 12px;
  }
  .accordion-item[aria-expanded="true"] .accordion-chev svg{
    transform: rotate(180deg);
  }

  .accordion-panel p{ margin: 0 0 12px; color:#24324a; font-size:1.1rem; }
  .accordion-panel ul{ margin:0 0 12px 18px; color: var(--muted); }
  .accordion-panel a{ color: var(--accent); text-decoration: none; }

  @media (prefers-reduced-motion: reduce){
    .accordion-panel, .accordion-chev svg { transition: none; }
  }

  @media (max-width:520px){
    .accordion-item-header{ padding: 12px; }
    .accordion-chev{ width:34px; height:34px; }
  }