:root {
  --paper: #f5f0e6;
  --ink: #14213d;
  --muted: #5c6675;
  --red: #a34535;
  --line: rgba(20, 33, 61, 0.17);
  --white: #fffdf8;
  --body-size: 22px;
  --serif: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  --sans: "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0, rgba(163, 69, 53, .12), transparent 34rem),
    var(--paper);
  font-family: var(--sans);
}
a { color: inherit; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 5vw;
  color: var(--white);
  background: rgba(20, 33, 61, .97);
}
.brand { font-family: var(--serif); font-size: 21px; font-weight: 700; text-decoration: none; }
.brand span { margin-left: 8px; color: rgba(255,255,255,.55); font-family: var(--sans); font-size: 13px; }
.topbar nav { display: flex; gap: 24px; }
.topbar nav a { color: rgba(255,255,255,.76); font-size: 14px; text-decoration: none; }
.topbar nav a:hover, .topbar nav a:focus-visible { color: #fff; }

main { overflow: hidden; }
.hero {
  width: min(1120px, 90vw);
  margin: 0 auto;
  padding: clamp(70px, 10vw, 126px) 0 clamp(60px, 8vw, 96px);
}
.eyebrow { margin: 0 0 18px; color: var(--red); font-size: 14px; font-weight: 800; letter-spacing: .16em; }
.hero h1 { margin: 0; font-family: var(--serif); font-size: clamp(50px, 7.3vw, 92px); line-height: 1.08; letter-spacing: -.035em; }
.hero h1 em { color: var(--red); font-style: normal; }
.dek { max-width: 900px; margin: 32px 0 0; font-family: var(--serif); font-size: var(--body-size); line-height: 1.85; }
.case-card {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 52px 0 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
}
.case-card div { padding: 20px 20px 22px 0; }
.case-card dt { color: var(--muted); font-size: 13px; }
.case-card dd { margin: 8px 0 0; font-family: var(--serif); font-size: 18px; font-weight: 700; }

.oral-copy {
  width: min(840px, 90vw);
  margin: 0 auto;
  padding: clamp(68px, 9vw, 110px) 0;
}
.document-head { display: flex; justify-content: space-between; gap: 20px; padding-bottom: 12px; border-bottom: 2px solid var(--ink); color: var(--red); font-size: 13px; letter-spacing: .08em; }
.oral-copy h2, .three-lines h2, .source-note h2 { font-family: var(--serif); }
.oral-copy h2 { margin: 42px 0 46px; font-size: clamp(36px, 5vw, 54px); line-height: 1.25; }
.oral-copy p, .oral-copy blockquote, .three-lines li, .source-note p {
  font-family: var(--serif);
  font-size: var(--body-size);
  line-height: 2;
}
.oral-copy p { margin: 0 0 1.4em; }
.oral-copy blockquote {
  margin: 36px 0;
  padding: 28px 32px;
  border-left: 5px solid var(--red);
  background: var(--white);
}
.key-question {
  margin: 42px -32px !important;
  padding: 30px 32px;
  color: var(--white);
  background: var(--ink);
}
.request { padding-top: 26px; border-top: 2px solid var(--ink); font-weight: 700; }

.three-lines {
  width: min(980px, 92vw);
  margin: 0 auto 90px;
  padding: clamp(52px, 7vw, 80px);
  color: var(--white);
  background: var(--ink);
}
.three-lines .eyebrow { color: #e6a18f; }
.three-lines h2 { max-width: 760px; margin: 0; font-size: clamp(34px, 5vw, 54px); line-height: 1.28; }
.three-lines ol { margin: 46px 0 0; padding: 0; list-style: none; counter-reset: lines; }
.three-lines li { position: relative; padding: 28px 0 28px 72px; border-top: 1px solid rgba(255,255,255,.2); counter-increment: lines; }
.three-lines li::before { content: "0" counter(lines); position: absolute; left: 0; top: 30px; color: #e6a18f; font-family: var(--sans); font-size: 15px; font-weight: 800; }

.source-note {
  width: min(840px, 90vw);
  margin: 0 auto 96px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.source-note h2 { margin: 0 0 14px; font-size: 28px; }
.source-note p { margin: 0; color: var(--muted); }

footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 36px 5vw;
  color: rgba(255,255,255,.72);
  background: var(--ink);
}
footer p { max-width: 940px; margin: 0; font-family: var(--serif); font-size: var(--body-size); line-height: 1.8; }
footer a { align-self: flex-start; color: #fff; font-size: 14px; white-space: nowrap; }

@media (max-width: 760px) {
  .topbar { padding: 0 18px; }
  .topbar nav a:not(:first-child) { display: none; }
  .hero { width: 90vw; padding-top: 58px; }
  .case-card { grid-template-columns: 1fr 1fr; }
  .case-card div { border-bottom: 1px solid var(--line); }
  .document-head { align-items: flex-start; flex-direction: column; }
  .key-question { margin-inline: -5vw !important; padding-inline: 5vw; }
  .oral-copy blockquote { margin-inline: 0; padding: 24px 20px; }
  .three-lines { width: 100%; margin-bottom: 70px; padding-inline: 5vw; }
  .three-lines li { padding-left: 54px; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }