:root {
  --ink: #111827;
  --muted: #667085;
  --line: #e5e7eb;
  --soft: #f6f8fb;
  --accent: #0f766e;
  --accent-2: #b45309;
  --paper: #ffffff;
  --white: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.8;
  overflow-x: hidden;
}
h1, h2, h3, p, a, td, th, .meta, .note, .cta, .sidebar {
  overflow-wrap: anywhere;
  word-break: normal;
  line-break: anywhere;
}
a { color: var(--accent); }
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px clamp(16px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { color: var(--ink); font-size: 20px; font-weight: 800; text-decoration: none; }
nav { display: flex; gap: 14px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 700; }
nav a:hover, .brand:hover { color: var(--accent); }
.hero, .wrap, .content-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(26px, 5vw, 58px) clamp(16px, 4vw, 32px);
}
.hero {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}
.hero-inner {
  max-width: 760px;
}
.hero h1 {
  max-width: 760px;
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
  margin: 0 0 18px;
}
.hero p { max-width: 720px; color: var(--muted); font-size: 17px; margin: 0; }
.content-shell {
  display: grid;
  grid-template-columns: minmax(210px, 260px) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 44px);
  align-items: start;
}
.sidebar {
  position: sticky;
  top: 84px;
  border-right: 1px solid var(--line);
  padding-right: 20px;
}
.sidebar h2, .sidebar h3 {
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0;
  line-height: 1.35;
  margin: 0 0 10px;
}
.side-block { margin: 0 0 28px; }
.side-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.side-list a {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
  font-size: 14px;
}
.side-list span { color: var(--muted); }
.keyword-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.keyword-list a {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  padding: 5px 10px;
  text-decoration: none;
}
.main-stack { display: grid; gap: clamp(32px, 6vw, 64px); }
.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}
.section-head h2, .wrap > h1 {
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.2;
  letter-spacing: 0;
  margin: 0;
}
.section-head p, .lead { color: var(--muted); margin: 8px 0 0; max-width: 620px; }
.grid, .feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.category-sections { display: grid; gap: 30px; }
.category-band {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.category-band .grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.article-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto 1fr;
}
.article-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--soft);
}
.article-card div { padding: 16px; }
.article-card h2 { font-size: 18px; line-height: 1.45; margin: 0 0 8px; }
.article-card p, .meta, .note { color: var(--muted); font-size: 14px; margin: 0; }
.article-card a { color: var(--ink); text-decoration: none; }
.article-card .readmore {
  color: var(--accent);
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  margin-top: 12px;
}
.article {
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 54px) clamp(16px, 4vw, 28px);
}
.article h1 { font-size: clamp(28px, 5vw, 48px); line-height: 1.22; letter-spacing: 0; margin: 0 0 16px; }
.article img.hero-image {
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: contain;
  display: block;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  margin: 18px 0;
}
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin: 18px 0;
}
.stat {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 12px;
}
.stat b { display: block; font-size: 20px; }
.disclosure {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  padding: 14px;
  margin: 18px 0;
  color: var(--muted);
}
.cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  padding: 12px 16px;
  font-weight: 800;
  margin: 16px 0;
}
.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px clamp(16px, 4vw, 44px);
  color: var(--muted);
  background: var(--white);
  font-size: 13px;
}
@media (max-width: 880px) {
  .content-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; border-right: 0; border-bottom: 1px solid var(--line); padding: 0 0 22px; }
}
@media (max-width: 720px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  nav { row-gap: 8px; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .hero h1 { font-size: 32px; line-height: 1.18; }
  .article h1 { font-size: 30px; line-height: 1.28; }
  .hero h1,
  .hero p,
  .article h1,
  .article h2,
  .article p,
  .disclosure,
  .article-card h2,
  .article-card p {
    word-break: break-all;
  }
}