:root {
  --ink: #171713;
  --muted: #615e54;
  --cream: #fffaf0;
  --paper: #fff;
  --soy: #f5bb22;
  --soy-deep: #9b5c00;
  --safe: #1f6d4d;
  --danger: #a6342b;
  --line: #e2d9c6;
  --shadow: 0 18px 46px rgba(38, 29, 8, .11);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 86% 4%, rgba(245, 187, 34, .32), transparent 23rem),
    linear-gradient(180deg, #fffdf7 0, #f7f2e8 100%);
  font-family: "Noto Serif TC", "Songti TC", "Microsoft JhengHei", serif;
  line-height: 1.8;
}
a { color: #754600; text-underline-offset: .18em; }
a:hover { color: #2e1c00; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; max-width: 1080px; margin: auto; padding: 1.1rem 1.25rem; }
.brand { color: var(--ink); font-weight: 900; letter-spacing: .08em; text-decoration: none; }
.site-header nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .85rem; font-size: .92rem; }
.hero { position: relative; overflow: hidden; max-width: 1080px; margin: 0 auto; padding: 4.8rem 1.25rem 3.4rem; }
.hero::after { content: "5"; position: absolute; right: 2%; top: -.2em; color: rgba(245,187,34,.12); font: 900 clamp(15rem, 34vw, 28rem)/1 sans-serif; pointer-events: none; }
.eyebrow { position: relative; z-index: 1; margin: 0 0 .8rem; color: var(--soy-deep); font-weight: 900; letter-spacing: .16em; }
h1 { position: relative; z-index: 1; max-width: 13ch; margin: 0; font-size: clamp(2.5rem, 7vw, 5.3rem); line-height: 1.08; letter-spacing: -.045em; }
.hero-answer { position: relative; z-index: 1; max-width: 780px; margin: 1.6rem 0 0; padding: 1.25rem 1.4rem; border-left: .48rem solid var(--soy); background: rgba(255,255,255,.84); box-shadow: var(--shadow); font-size: clamp(1.05rem, 2vw, 1.25rem); }
main { max-width: 900px; margin: 0 auto; padding: 0 1.25rem 5rem; }
.scope-note, .security-note { margin: 0 0 2.6rem; padding: 1.1rem 1.25rem; border-radius: 1rem; background: var(--paper); box-shadow: 0 8px 26px rgba(38,29,8,.06); }
.scope-note { border: 1px solid var(--line); color: var(--muted); }
.security-note { border: 2px solid var(--safe); }
.security-note strong { color: var(--safe); }
section { margin: 4rem 0; scroll-margin-top: 1rem; }
h2 { margin: 0 0 1rem; font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 1.3; }
h3 { margin: 0 0 .35rem; font-size: 1.28rem; }
.lede { color: #403c34; font-size: 1.08rem; }
.steps { display: grid; gap: 1rem; margin: 1.5rem 0; padding: 0; list-style: none; counter-reset: step; }
.steps li { position: relative; min-height: 7rem; padding: 1.3rem 1.3rem 1.3rem 5rem; border: 1px solid var(--line); border-radius: 1.15rem; background: var(--paper); box-shadow: 0 10px 30px rgba(38,29,8,.07); }
.steps li::before { counter-increment: step; content: "0" counter(step); position: absolute; left: 1.15rem; top: 1.15rem; display: grid; place-items: center; width: 2.8rem; height: 2.8rem; border-radius: .8rem; background: var(--soy); font: 900 1rem/1 sans-serif; }
.steps p { margin: .35rem 0 0; color: var(--muted); }
.check-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.check-card { padding: 1.25rem; border-radius: 1rem; background: var(--paper); border: 1px solid var(--line); }
.check-card.safe { border-top: .42rem solid var(--safe); }
.check-card.stop { border-top: .42rem solid var(--danger); }
.check-card ul { margin-bottom: 0; padding-left: 1.25rem; }
.trouble { padding: 1.35rem; border-radius: 1rem; background: #fff3c9; }
.faq { display: grid; gap: .8rem; }
details { padding: 1rem 1.15rem; border: 1px solid var(--line); border-radius: .9rem; background: var(--paper); }
summary { cursor: pointer; font-weight: 900; }
.sources { padding: 1.2rem 1.4rem; border-radius: 1rem; background: #eae4d8; }
.cta { padding: 2rem; border-radius: 1.2rem; color: #fff9e7; background: #171713; }
.cta a.button { display: inline-block; margin-top: .6rem; padding: .8rem 1rem; border-radius: .7rem; color: #18140b; background: var(--soy); font-weight: 900; text-decoration: none; }
footer { border-top: 1px solid var(--line); background: #ece5d8; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; max-width: 900px; margin: auto; padding: 1.5rem 1.25rem; color: var(--muted); font-size: .9rem; }
.footer-inner nav { display: flex; gap: 1rem; }

@media (max-width: 680px) {
  .site-header { align-items: flex-start; }
  .hero { padding-top: 3rem; }
  .steps li { padding-left: 1.3rem; padding-top: 4.8rem; }
  .check-grid { grid-template-columns: 1fr; }
}