:root {
  --ink: #1c2430;
  --sub: #5b6573;
  --line: #e3e6ea;
  --bg: #ffffff;
  --soft: #f5f6f8;
  --accent: #1f3a5f;
  --accent-soft: #e8eef5;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.9;
  letter-spacing: .03em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
img { max-width: 100%; }
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

/* header */
header.site { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 10; }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.logo { font-weight: 700; font-size: 19px; letter-spacing: .08em; color: var(--ink); text-decoration: none; white-space: nowrap; }
.logo span { color: var(--accent); }
nav.gnav ul { display: flex; gap: 26px; list-style: none; font-size: 14px; }
nav.gnav a { color: var(--sub); text-decoration: none; }
nav.gnav a:hover { color: var(--accent); }
nav.gnav a.btn-s { color: #fff; background: var(--accent); padding: 8px 16px; border-radius: 4px; }

/* hero */
.hero { padding: 112px 0 104px; }
.hero .en { font-size: 13px; letter-spacing: .3em; color: var(--accent); font-weight: 700; margin-bottom: 18px; }
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.45; font-weight: 700; letter-spacing: .06em; }
.hero .catch { font-size: clamp(18px, 2.6vw, 24px); font-weight: 700; margin-top: 18px; letter-spacing: .06em; }
.hero .lead { margin-top: 26px; color: var(--sub); font-size: 16px; max-width: 640px; }

.page-hero { padding: 72px 0 56px; background: var(--soft); }
.page-hero .en { font-size: 12px; letter-spacing: .3em; color: var(--accent); font-weight: 700; }
.page-hero h1 { font-size: clamp(26px, 4vw, 36px); line-height: 1.5; margin-top: 8px; letter-spacing: .05em; }
.page-hero p { color: var(--sub); margin-top: 16px; max-width: 680px; }

/* sections */
section.block { padding: 96px 0; }
section.block.soft { background: var(--soft); }
.label { font-size: 12px; letter-spacing: .3em; color: var(--accent); font-weight: 700; }
h2.sec { font-size: 26px; font-weight: 700; margin: 8px 0 40px; letter-spacing: .08em; line-height: 1.6; }
.intro { color: var(--sub); max-width: 720px; margin: -16px 0 40px; }
p + p { margin-top: 1em; }

.cards { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.card { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 34px 30px; }
.card .num { font-size: 13px; color: var(--accent); font-weight: 700; letter-spacing: .15em; }
.card h3 { font-size: 20px; margin: 8px 0 14px; letter-spacing: .05em; line-height: 1.5; }
.card p { color: var(--sub); font-size: 15px; }
.card ul { margin-top: 14px; padding-left: 1.2em; color: var(--sub); font-size: 15px; }
.card .more { display: inline-block; margin-top: 18px; font-size: 14px; font-weight: 700; text-decoration: none; }

.message { display: grid; grid-template-columns: 220px 1fr; gap: 48px; align-items: start; }
.message .sign { font-weight: 700; margin-top: 28px; }
.message .sign small { display: block; font-weight: 400; color: var(--sub); font-size: 13px; }
.message .name-box { border-left: 3px solid var(--accent); padding-left: 18px; }
.message .name-box p.role { font-size: 13px; color: var(--sub); }
.message .name-box p.nm { font-size: 22px; font-weight: 700; letter-spacing: .1em; margin-top: 0; }

table.company { width: 100%; border-collapse: collapse; font-size: 15px; }
table.company th, table.company td { text-align: left; padding: 22px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.company tr:first-child th, table.company tr:first-child td { border-top: 1px solid var(--line); }
table.company th { width: 180px; font-weight: 700; }

/* column list */
.posts { list-style: none; border-top: 1px solid var(--line); }
.posts li { border-bottom: 1px solid var(--line); }
.posts a { display: block; padding: 22px 4px; text-decoration: none; color: var(--ink); }
.posts a:hover h3 { color: var(--accent); }
.posts .meta { font-size: 12px; color: var(--sub); letter-spacing: .1em; }
.posts .cat { display: inline-block; background: var(--accent-soft); color: var(--accent); padding: 0 10px; border-radius: 3px; margin-right: 10px; font-weight: 700; }
.posts h3 { font-size: 17px; margin-top: 6px; line-height: 1.6; }
.posts p { font-size: 14px; color: var(--sub); margin-top: 6px; }

/* lists */
.checks { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 32px; }
.checks li { padding-left: 30px; position: relative; }
.checks li::before { content: ""; position: absolute; left: 0; top: 7px; width: 18px; height: 18px; border-radius: 50%; background: var(--accent); }
.checks li::after { content: ""; position: absolute; left: 6px; top: 11px; width: 6px; height: 9px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }

.steps { list-style: none; counter-reset: s; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.steps li { counter-increment: s; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 26px 22px; font-size: 14px; color: var(--sub); }
.steps li::before { content: "STEP " counter(s); display: block; font-size: 12px; color: var(--accent); font-weight: 700; letter-spacing: .15em; }
.steps li strong { display: block; color: var(--ink); font-size: 17px; margin: 4px 0 8px; }

.faq dt { font-weight: 700; padding: 22px 0 6px 34px; position: relative; border-top: 1px solid var(--line); }
.faq dt::before { content: "Q"; position: absolute; left: 0; color: var(--accent); font-size: 18px; top: 19px; }
.faq dd { padding: 0 0 22px 34px; color: var(--sub); position: relative; }
.faq dd::before { content: "A"; position: absolute; left: 0; color: var(--sub); font-weight: 700; font-size: 18px; top: -3px; }
.faq { border-bottom: 1px solid var(--line); }

/* cta */
.cta { background: var(--accent); color: #fff; border-radius: 10px; padding: 52px 40px; text-align: center; }
.cta h2 { font-size: 24px; letter-spacing: .06em; line-height: 1.6; }
.cta p { opacity: .85; margin-top: 12px; }
.cta a.btn { display: inline-block; margin-top: 26px; background: #fff; color: var(--accent); font-weight: 700; padding: 14px 36px; border-radius: 4px; text-decoration: none; }

/* article */
.crumbs { font-size: 12px; color: var(--sub); padding: 18px 0 0; }
.crumbs a { color: var(--sub); }
article.post { padding: 40px 0 80px; }
article.post .meta { font-size: 13px; color: var(--sub); }
article.post h1 { font-size: clamp(24px, 3.6vw, 32px); line-height: 1.55; margin: 10px 0 28px; letter-spacing: .04em; }
article.post .lead { background: var(--soft); border-radius: 8px; padding: 22px 26px; color: var(--ink); }
article.post .toc { border: 1px solid var(--line); border-radius: 8px; padding: 20px 26px; margin: 32px 0; font-size: 14px; }
article.post .toc p { font-weight: 700; }
article.post .toc ol { padding-left: 1.4em; margin-top: 6px; }
article.post .toc a { text-decoration: none; }
article.post h2 { font-size: 22px; margin: 56px 0 18px; padding-bottom: 10px; border-bottom: 2px solid var(--ink); line-height: 1.55; letter-spacing: .04em; }
article.post h3 { font-size: 18px; margin: 34px 0 12px; padding-left: 12px; border-left: 4px solid var(--accent); line-height: 1.55; }
article.post p { margin-top: 1em; }
article.post ul, article.post ol { margin: 1em 0 0 1.4em; }
article.post li + li { margin-top: .4em; }
article.post .point { background: var(--accent-soft); border-radius: 8px; padding: 18px 22px; margin-top: 1.4em; }
article.post .point strong { color: var(--accent); }
article.post .example { border: 1px dashed #b8c2cf; border-radius: 8px; padding: 18px 22px; margin-top: 1.2em; font-size: 15px; }
.author { display: flex; gap: 20px; border: 1px solid var(--line); border-radius: 8px; padding: 24px; margin-top: 56px; }
.author .ic { flex: 0 0 56px; height: 56px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 20px; }
.author .who { font-weight: 700; }
.author .who small { color: var(--sub); font-weight: 400; margin-left: 8px; }
.author p { font-size: 14px; color: var(--sub); margin-top: 6px; }
.related { margin-top: 48px; }
.related h2 { border: 0; font-size: 18px; margin: 0 0 8px; padding: 0; }

footer.site { border-top: 1px solid var(--line); padding: 44px 0 36px; font-size: 13px; color: var(--sub); }
footer.site .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
footer.site ul { list-style: none; display: flex; gap: 20px; flex-wrap: wrap; }
footer.site a { color: var(--sub); text-decoration: none; }

@media (max-width: 760px) {
  .wrap { padding: 0 16px; }
  header.site .wrap { height: auto; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
  nav.gnav ul { gap: 14px; font-size: 13px; flex-wrap: wrap; }
  nav.gnav a.btn-s { padding: 4px 10px; }
  .hero { padding: 72px 0 64px; }
  section.block { padding: 64px 0; }
  .cards, .cards.three, .checks { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .message { grid-template-columns: 1fr; gap: 20px; }
  table.company th, table.company td { display: block; width: 100%; padding: 0; border: 0; }
  table.company th { padding-top: 18px; font-size: 13px; color: var(--sub); }
  table.company td { padding: 4px 0 18px; border-bottom: 1px solid var(--line); }
  table.company tr:first-child th { border-top: 1px solid var(--line); }
  table.company tr:first-child td { border-top: 0; }
  .cta { padding: 40px 22px; }
  .author { flex-direction: column; }
}

.badge { display: inline-block; background: #b42318; color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .1em; padding: 3px 12px; border-radius: 3px; margin-bottom: 10px; }
.cta .badge { background: #fff; color: #b42318; }
.badge-inline { display: inline-block; vertical-align: middle; background: #b42318; color: #fff; font-size: 12px; font-weight: 700; letter-spacing: .08em; padding: 1px 8px; border-radius: 3px; margin-left: 6px; }