:root {
  --ink: #17212b;
  --soft: #52606c;
  --line: #dbe3e8;
  --mist: #f4f7f8;
  --paper: #ffffff;
  --aqua: #087fa9;
  --green: #14785f;
  --yellow: #f6c945;
  --warn: #9c5b10;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.9;
}
a { color: var(--aqua); }
.inner { width: min(900px, calc(100% - 48px)); margin: 0 auto; }

header.site {
  border-top: 4px solid var(--ink);
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-logo { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; flex-shrink: 0; }
.site-logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: #fff;
  background: #4ec3f5;
  border-radius: 8px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
}
.site-logo-copy { display: block; }
.site-name { display: block; color: var(--ink); font-family: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: 1.15rem; font-weight: 700; line-height: 1.2; }
.site-name-sub { display: block; margin-top: 2px; color: var(--soft); font-size: .65rem; font-weight: 700; line-height: 1.2; letter-spacing: 0; }
nav.site-nav { display: flex; flex-wrap: wrap; gap: 18px; }
nav.site-nav a { color: var(--soft); text-decoration: none; font-size: .88rem; }

main { padding: 52px 0 82px; }
.breadcrumb { margin: 0 0 28px; color: var(--soft); font-size: .82rem; }
.category { color: var(--aqua); font-size: .76rem; font-weight: 850; }
h1 {
  max-width: 860px;
  margin: 8px 0 14px;
  font-size: clamp(1.8rem, 5vw, 2.75rem);
  line-height: 1.35;
  letter-spacing: 0;
}
.meta { margin: 0; color: var(--soft); font-size: .84rem; }
.lead {
  margin: 30px 0;
  padding: 23px 25px;
  background: var(--mist);
  border-left: 5px solid var(--aqua);
}
.lead p:last-child { margin-bottom: 0; }
p { margin: 0 0 18px; }
h2 {
  margin: 54px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  font-size: 1.42rem;
  line-height: 1.5;
  letter-spacing: 0;
}
h3 { margin: 30px 0 9px; font-size: 1.12rem; line-height: 1.55; }
ul, ol { padding-left: 1.35em; }
li { margin: 7px 0; }

.toc { padding: 21px 23px; border: 1px solid var(--line); }
.toc strong { display: block; margin-bottom: 7px; }
.toc ol { margin: 0; }

.summary-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 28px 0 8px;
  border: 1px solid var(--line);
}
.summary-item { min-height: 150px; padding: 20px; border-right: 1px solid var(--line); }
.summary-item:last-child { border-right: 0; }
.summary-item .name { display: block; margin-bottom: 7px; font-weight: 850; }
.summary-item .role { display: inline-block; margin-bottom: 8px; color: var(--green); font-size: .74rem; font-weight: 850; }
.summary-item p { margin: 0; color: var(--soft); font-size: .9rem; line-height: 1.7; }

.table-wrap { margin: 22px 0; overflow-x: auto; border: 1px solid var(--line); }
.compare-table { width: 100%; min-width: 720px; border-collapse: collapse; font-size: .9rem; }
.compare-table th, .compare-table td {
  padding: 13px 14px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.compare-table th:last-child, .compare-table td:last-child { border-right: 0; }
.compare-table tr:last-child td { border-bottom: 0; }
.compare-table thead th { color: #fff; background: var(--ink); font-size: .82rem; }
.compare-table tbody th { width: 160px; background: var(--mist); }
.compare-table .service { min-width: 150px; font-weight: 800; }

.service-block { margin: 24px 0; padding: 22px 24px; border-left: 4px solid var(--aqua); background: #fff; box-shadow: inset 0 0 0 1px var(--line); }
.service-block h3 { margin-top: 0; }
.facts { display: grid; grid-template-columns: 150px 1fr; margin: 14px 0 0; border-top: 1px solid var(--line); }
.facts dt, .facts dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--line); }
.facts dt { padding-right: 14px; color: var(--soft); font-size: .84rem; font-weight: 750; }
.facts dd { font-size: .92rem; }

.workflow { counter-reset: flow; list-style: none; padding: 0; }
.workflow li {
  position: relative;
  min-height: 50px;
  margin: 0;
  padding: 12px 12px 14px 54px;
  border-bottom: 1px solid var(--line);
}
.workflow li::before {
  counter-increment: flow;
  content: counter(flow);
  position: absolute;
  top: 10px;
  left: 4px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  font-weight: 850;
}

.note, .warning, .method-box { margin: 25px 0; padding: 18px 20px; }
.note { background: #eef8f5; border-left: 4px solid var(--green); }
.warning { background: #fff9ed; border-left: 4px solid var(--warn); }
.method-box { background: var(--mist); border-left: 4px solid var(--yellow); }
.note p:last-child, .warning p:last-child, .method-box p:last-child { margin-bottom: 0; }

.source-status {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  color: var(--green);
  background: #e8f5f0;
  font-size: .7rem;
  font-weight: 800;
}
.sources { padding: 21px 23px; background: var(--mist); }
.sources ul { margin: 0; }
.sources li { margin: 9px 0; }
.sources small { display: block; color: var(--soft); }
.related { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line); }
.related strong { display: block; margin-bottom: 8px; }
.related a { display: inline-block; margin: 4px 14px 4px 0; }

footer { padding: 30px 0; color: #d8e0e6; background: var(--ink); font-size: .85rem; }
footer a { color: #fff; }

@media (max-width: 700px) {
  .inner { width: min(100% - 32px, 900px); }
  .header-inner { align-items: flex-start; flex-direction: column; padding: 16px 0; }
  main { padding-top: 40px; }
  .summary-strip { grid-template-columns: 1fr; }
  .summary-item { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .summary-item:last-child { border-bottom: 0; }
  .facts { grid-template-columns: 1fr; }
  .facts dt { padding-bottom: 0; border-bottom: 0; }
  .facts dd { padding-top: 2px; }
}