:root { --ink:#1a1a1a; --muted:#5b6470; --line:#e3e6ea; --bg:#ffffff; --accent:#0b5cad; }
  * { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; }
  body {
    margin: 0; background: var(--bg); color: var(--ink);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 17px; line-height: 1.75;
    display: flex; flex-direction: column; min-height: 100vh;
  }

  /* ---------- header ---------- */
  .site-header {
    border-bottom: 1px solid var(--line);
    padding: 0.8rem 1.25rem;
    display: flex; flex-wrap: wrap; gap: 0.3rem 1.1rem; align-items: baseline;
  }
  .site-header .inner {
    max-width: 42rem; margin: 0 auto; width: 100%;
    display: flex; flex-wrap: wrap; gap: 0.3rem 1.1rem; align-items: baseline;
  }
  .site-header .brand {
    font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em;
    text-decoration: none; color: var(--ink); margin-right: 0.3rem;
  }
  .site-header nav { display: flex; flex-wrap: wrap; gap: 0.3rem 1.05rem; }
  .site-header nav a { color: var(--accent); text-decoration: none; font-size: 0.95rem; }
  .site-header nav a:hover, .site-header nav a:focus { text-decoration: underline; }
  .site-header nav a[aria-current="page"] { color: var(--ink); font-weight: 600; text-decoration: none; }

  /* ---------- main ---------- */
  /* column flex 的 line 交叉尺寸由最宽 item 内容决定，宽表格会把整页撑开。
     min-width:0 不够，必须显式锁 width:100% 让 item 退回容器宽度。 */
  .site-header, .site-footer, main { width: 100%; }
  .site-header > .inner, .site-footer > .inner, main { min-width: 0; }
  main { flex: 1 0 auto; }
  .wrap { max-width: 42rem; margin: 0 auto; padding: 1.5rem 1.25rem 3.5rem; }
  h1 { font-size: 1.85rem; line-height: 1.25; letter-spacing: -0.02em; margin: 0.5rem 0 1.25rem; }
  h2 { font-size: 1.32rem; line-height: 1.35; margin: 2.75rem 0 0.9rem; letter-spacing: -0.01em; }
  p { margin: 0 0 1.15rem; }
  strong { font-weight: 650; }
  a { color: var(--accent); }
  .lede p:first-of-type { font-size: 1.06rem; }
  ul, ol { padding-left: 1.15rem; margin: 0 0 1.15rem; }
  li { margin-bottom: 0.7rem; }
  .verified { font-size: 0.92rem; color: var(--muted); font-style: italic; margin: -0.4rem 0 1.4rem; }
  .updated { font-size: 0.9rem; color: var(--muted); margin: -0.6rem 0 1.6rem; }
  .tablewrap { overflow-x: auto; margin: 1.5rem 0 1.75rem; -webkit-overflow-scrolling: touch; }
  table { border-collapse: collapse; width: 100%; min-width: 34rem; font-size: 0.94rem; line-height: 1.5; }
  caption { text-align: left; font-size: 0.92rem; color: var(--muted); padding-bottom: 0.5rem; }
  th, td { border: 1px solid var(--line); padding: 0.6rem 0.7rem; text-align: left; vertical-align: top; }
  thead th { background: #f5f7f9; font-weight: 650; }
  tbody th { background: #fafbfc; font-weight: 600; width: 9rem; }
  .note {
    border-left: 3px solid var(--line); padding: 0.15rem 0 0.15rem 1rem;
    color: var(--muted); font-size: 0.94rem; margin: 0 0 1.4rem;
  }
  address { font-style: normal; }

  /* ---------- footer ---------- */
  .site-footer {
    flex-shrink: 0;
    border-top: 1px solid var(--line);
    background: #fafbfc;
    padding: 1.75rem 1.25rem 2.25rem;
  }
  .site-footer .inner { max-width: 42rem; margin: 0 auto; }
  .site-footer nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; margin-bottom: 0.85rem; }
  .site-footer nav a { color: var(--accent); text-decoration: none; font-size: 0.94rem; }
  .site-footer nav a:hover, .site-footer nav a:focus { text-decoration: underline; }
  .site-footer p { margin: 0; font-size: 0.88rem; color: var(--muted); }
  /* FTC 要求联盟披露清晰可见，别做成最小号灰字 */
  .site-footer .aff-disclosure { font-size: 0.95rem; margin-bottom: 0.5rem; }
  .aff-note { font-size: 0.95rem; color: var(--muted); margin: -0.55rem 0 1.4rem; }
  .eligibility-figure { margin: 1.5rem 0 2rem; }
  .eligibility-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 14px; }
  .eligibility-figure figcaption { color: var(--muted); font-size: 0.9rem; margin-top: 0.5rem; }

  @media (max-width: 480px) {
    body { font-size: 16.5px; }
    h1 { font-size: 1.6rem; }
    h2 { font-size: 1.22rem; }
    .wrap { padding: 1.15rem 1rem 2.75rem; }
    tbody th { width: 7.5rem; }
    .site-header { padding: 0.7rem 1rem; }
    .site-footer { padding: 1.4rem 1rem 1.9rem; }
  }