:root {
  --navy: #102442;
  --navy2: #163050;
  --gold: #d9a441;
  --ink: #1c2430;
  --grey: #5c6775;
  --bg: #f7f8fa;
  --card: #ffffff;
  --line: #e3e7ed;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Serif TC", "Songti TC", "Hiragino Mincho ProN", serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

/* Header */
header {
  background: var(--navy);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 2px solid var(--gold);
}
.header-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.brand { font-size: 1.15rem; font-weight: 700; letter-spacing: .04em; }
.brand a { color: #fff; text-decoration: none; }
.brand .sub { color: var(--gold); font-size: .78rem; display: block; font-weight: 400; }
nav a {
  color: #e8ecf2;
  text-decoration: none;
  font-size: .9rem;
  margin-left: 18px;
}
nav a:hover { color: var(--gold); }

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy2) 100%);
  color: #fff;
  text-align: center;
  padding: 72px 20px 64px;
}
.hero h1 { font-size: 1.9rem; letter-spacing: .06em; line-height: 1.6; }
.hero h1 .gold { color: var(--gold); }
.hero p.lead { margin-top: 18px; color: #c9d3e0; font-size: 1rem; }
.hero .cta {
  display: inline-block;
  margin-top: 30px;
  background: var(--gold);
  color: var(--navy);
  font-weight: 700;
  padding: 12px 34px;
  border-radius: 999px;
  text-decoration: none;
  letter-spacing: .08em;
}
.hero .cta:hover { opacity: .9; }

/* Layout */
main { max-width: 980px; margin: 0 auto; padding: 48px 20px 80px; }
.section-title {
  font-size: 1.3rem;
  color: var(--navy);
  border-left: 5px solid var(--gold);
  padding-left: 12px;
  margin: 44px 0 22px;
  letter-spacing: .05em;
}
.section-title:first-child { margin-top: 0; }

/* Article cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 22px 18px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: 0 6px 20px rgba(16,36,66,.12); transform: translateY(-2px); }
.card .cat {
  font-size: .72rem;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 8px;
}
.card h3 { font-size: 1.02rem; line-height: 1.6; color: var(--navy); }
.card p { font-size: .85rem; color: var(--grey); margin-top: 10px; flex: 1; }
.card .date { font-size: .75rem; color: #9aa4b0; margin-top: 12px; }

/* Article page */
article.post { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 44px 46px; }
article.post .cat { color: var(--gold); font-weight: 700; font-size: .8rem; letter-spacing: .1em; }
article.post h1 { font-size: 1.55rem; color: var(--navy); line-height: 1.6; margin: 10px 0 6px; }
article.post .date { color: #9aa4b0; font-size: .82rem; margin-bottom: 28px; }
article.post h2 {
  font-size: 1.12rem;
  color: var(--navy);
  margin: 34px 0 14px;
  padding-left: 10px;
  border-left: 4px solid var(--gold);
}
article.post p { margin: 14px 0; }
article.post ul, article.post ol { margin: 14px 0 14px 1.6em; }
article.post li { margin: 6px 0; }
article.post blockquote {
  background: #f2f5f9;
  border-left: 4px solid var(--navy);
  padding: 14px 18px;
  margin: 18px 0;
  border-radius: 0 8px 8px 0;
  color: #333;
}
.case-box {
  background: #fdf8ee;
  border: 1px solid #ecd9ad;
  border-radius: 10px;
  padding: 16px 20px;
  margin: 20px 0;
  font-size: .92rem;
}
.case-box .label { color: #a07820; font-weight: 700; font-size: .8rem; letter-spacing: .08em; }
.post-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: .9rem;
  color: var(--grey);
}
.back { display: inline-block; margin-top: 26px; color: var(--navy); font-size: .9rem; }

/* About */
.profile { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 40px 44px; }
.profile h2 { color: var(--navy); font-size: 1.2rem; margin: 26px 0 12px; }
.profile h2:first-child { margin-top: 0; }
.profile table { border-collapse: collapse; width: 100%; font-size: .92rem; margin-top: 8px; }
.profile td { padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.profile td:first-child { color: var(--grey); white-space: nowrap; width: 9em; }

/* Contact */
.contact-box {
  background: var(--navy);
  color: #fff;
  border-radius: 14px;
  padding: 44px 30px;
  text-align: center;
  margin-top: 56px;
}
.contact-box h2 { font-size: 1.3rem; letter-spacing: .06em; }
.contact-box p { color: #c9d3e0; margin-top: 12px; font-size: .95rem; }
.contact-box a.mail {
  display: inline-block;
  margin-top: 22px;
  background: var(--gold);
  color: var(--navy);
  font-weight: 700;
  padding: 12px 36px;
  border-radius: 999px;
  text-decoration: none;
}
.contact-box .note { font-size: .8rem; color: #9db0c8; margin-top: 16px; }

/* Footer */
footer {
  background: var(--navy);
  color: #9db0c8;
  text-align: center;
  padding: 28px 20px;
  font-size: .8rem;
}
footer a { color: #c9d3e0; text-decoration: none; margin: 0 8px; }
footer a:hover { color: var(--gold); }

/* Disclaimer */
.disclaimer { font-size: .78rem; color: #9aa4b0; margin-top: 30px; }

/* Japanese version section */
hr.ja-sep { border: none; border-top: 2px solid var(--gold); margin: 44px 0 34px; }
.ja-version { font-size: .95em; }

@media (max-width: 640px) {
  .hero h1 { font-size: 1.4rem; }
  article.post { padding: 30px 22px; }
  .profile { padding: 28px 22px; }
  nav a { margin-left: 12px; font-size: .82rem; }
}