/* ====== Layout 基本設定 ====== */
body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  }
  
  /* ====== Header ====== */
  .site-header {
    background-color: #111827;          /* 深色背景 */
    color: #ffffff;
  }
  
  .site-header__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  /* Logo */
  .site-header__logo {
    font-weight: 700;
    font-size: 20px;
    color: #ffffff;
    text-decoration: none;
  }
  
  /* Nav */
  .site-header__nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 16px;
  }
  
  .site-header__nav-link {
    color: #e5e7eb;
    text-decoration: none;
    font-size: 14px;
    padding: 4px 0;
  }
  
  .site-header__nav-link:hover,
  .site-header__nav-link:focus {
    color: #ffffff;
    border-bottom: 2px solid #3b82f6;
  }
  
  /* 手機簡單排法（可再優化成 burger menu） */
  @media (max-width: 768px) {
    .site-header__inner {
      flex-direction: column;
      align-items: flex-start;
    }
  
    .site-header__nav-list {
      margin-top: 8px;
      gap: 12px;
      flex-wrap: wrap;
    }
  }

  /* ====== Footer ====== */
.site-footer {
    background-color: #020617;        /* 比 header 再深少少 */
    color: #9ca3af;
    margin-top: 40px;
  }
  
  .site-footer__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    font-size: 13px;
  }
  
  .site-footer__links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 16px;
  }
  
  .site-footer__links a {
    color: #e5e7eb;
    text-decoration: none;
  }
  
  .site-footer__links a:hover,
  .site-footer__links a:focus {
    color: #ffffff;
    text-decoration: underline;
  }
  
  /* 手機斷行 */
  @media (max-width: 768px) {
    .site-footer__inner {
      flex-direction: column;
      align-items: flex-start;
    }
  }