/* roulang page: index */
:root {
      --color-primary: #0A5C5A;
      --color-accent: #FF6B4A;
      --color-deep: #0A131A;
      --color-bg: #F8FAF9;
      --color-text: #1A2421;
      --color-muted: #596561;
      --color-border: #E2E8E5;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-card: 0 4px 20px -2px rgba(10, 92, 90, 0.05);
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      background-color: var(--color-bg);
      color: var(--color-text);
      line-height: 1.75;
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .custom-container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 640px) { .custom-container { padding-left: 1.5rem; padding-right: 1.5rem; } }
    @media (min-width: 1024px) { .custom-container { padding-left: 2rem; padding-right: 2rem; } }
    
    .section-spacing {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (max-width: 768px) {
      .section-spacing {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
      }
    }
    .card-transition {
      transition: all 0.25s ease-in-out;
    }
    .card-transition:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -4px rgba(10, 92, 90, 0.12);
    }
    .btn-action {
      transition: all 0.25s ease-in-out;
    }
    .btn-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 16px -2px rgba(255, 107, 74, 0.3);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }
    /* 进度条动效 */
    .progress-fill {
      transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }