/* One-Sto Plus サービス紹介の下層ページ共通（トップページ index.html と同じ色・書体） */
:root { --navy: #274690; --navy-d: #1b3270; --teal: #2fb4a8; --teal-d: #1f9d92; --teal-l: #e8f7f5; --amber: #f59e0b; --ink: #1f2937; --muted: #6b7280; --body: #4b5563; --line: #e5e7eb; --bg: #fbfbf9; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: 'Noto Sans JP', 'Yu Gothic UI', 'Meiryo', sans-serif; -webkit-font-smoothing: antialiased; line-height: 1.6; }
a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--navy-d); }
img { max-width: 100%; height: auto; }
.wrap { width: min(1160px, 100% - 40px); margin: 0 auto; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 52px; padding: 0 28px; border-radius: 8px; font-weight: 700; font-size: 16px; border: 1.5px solid transparent; cursor: pointer; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-d); color: #fff; }
.btn-ghost { background: #fff; color: var(--navy); border-color: #cbd5e1; }
.btn-ghost:hover { border-color: var(--navy); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; letter-spacing: 0.14em; color: var(--teal); }
.eyebrow .tag { background: var(--navy); color: #fff; border-radius: 4px; padding: 2px 8px; font-size: 12px; letter-spacing: 0.08em; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 12px; }

/* ナビ（トップページと同じ） */
header { position: sticky; top: 0; z-index: 10; background: rgba(251,251,249,0.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.nav img { height: 44px; width: auto; }
.nav nav { display: flex; align-items: center; gap: 26px; font-size: 15px; font-weight: 500; }
.nav .btn { height: 40px; padding: 0 18px; font-size: 14px; }
.nav .menu-toggle { display: none; }

/* ページ冒頭 */
.phero { background: #fff; border-bottom: 1px solid var(--line); padding: 44px 0 40px; }
.crumb { font-size: 13px; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--navy); }
.phero h1 { font-size: clamp(26px, 3.2vw, 40px); font-weight: 900; line-height: 1.35; margin: 10px 0 0; }
.phero h1 span { color: var(--navy); }
.phero .lead { font-size: 17px; line-height: 1.95; color: var(--body); margin: 18px 0 0; max-width: 860px; }
.phero .actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }

/* 本文 */
.article { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; padding: 56px 0 72px; align-items: start; }
.article .body { max-width: 780px; }
.body h2 { font-size: clamp(21px, 2.2vw, 27px); font-weight: 900; line-height: 1.4; margin: 48px 0 16px; padding-left: 14px; border-left: 5px solid var(--teal); }
.body h2:first-child { margin-top: 0; }
.body h3 { font-size: 18px; font-weight: 700; margin: 30px 0 10px; }
.body p { font-size: 16px; line-height: 2; color: var(--body); margin: 0 0 16px; }
.body ul, .body ol { font-size: 16px; line-height: 2; color: var(--body); margin: 0 0 16px; padding-left: 1.4em; }
.body li { margin: 2px 0; }
.body strong { color: var(--ink); }
.body figure { margin: 24px 0; }
.body figure img { display: block; width: 100%; border: 1px solid var(--line); border-radius: 10px; }
.body figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; }
.body table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 15px; margin: 20px 0 24px; box-shadow: 0 0 0 1px var(--line); border-radius: 10px; overflow: hidden; }
.body th, .body td { padding: 12px 14px; text-align: left; vertical-align: top; line-height: 1.7; box-shadow: inset 0 -1px 0 var(--line); }
.body th { background: #f3f6fb; font-weight: 700; color: var(--ink); }
.body tr:last-child th, .body tr:last-child td { box-shadow: none; }
.callout { background: var(--teal-l); border: 1px solid #bfe6e1; border-radius: 12px; padding: 20px 24px; margin: 24px 0; }
.callout b { display: block; color: var(--navy); margin-bottom: 6px; }
.callout p { margin: 0; }
.steps { display: flex; flex-direction: column; gap: 12px; margin: 20px 0 28px; }
.step { padding: 18px 20px; display: flex; gap: 16px; align-items: flex-start; }
.step .no { flex-shrink: 0; width: 36px; height: 36px; border-radius: 10px; background: var(--navy); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; }
.step b { display: block; font-size: 16px; }
.step small { font-size: 14px; color: var(--muted); line-height: 1.7; }
.ba { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; padding: 16px 20px; margin: 10px 0; }
.ba b { display: block; font-size: 15px; }
.ba small { font-size: 13px; color: var(--muted); }
.ba .after b { color: var(--navy); }

/* 右側 */
.side { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 16px; }
.side .box { padding: 22px; }
.side .box b { display: block; font-size: 16px; margin-bottom: 8px; }
.side .box p { font-size: 14px; color: var(--body); line-height: 1.8; margin: 0 0 14px; }
.side .box .btn { width: 100%; height: 46px; font-size: 15px; }
.side .links { display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.side .links a { display: flex; gap: 8px; align-items: center; }
.side .links a::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--teal); flex-shrink: 0; }

/* よくある質問 */
.faq-group { margin: 0 0 40px; }
.faq { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin: 0 0 12px; overflow: hidden; }
.faq summary { list-style: none; cursor: pointer; padding: 18px 22px; font-weight: 700; font-size: 16px; display: flex; gap: 12px; align-items: flex-start; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; color: var(--teal); font-weight: 900; flex-shrink: 0; }
.faq[open] summary { border-bottom: 1px solid var(--line); background: #f8fafc; }
.faq .a { padding: 16px 22px 20px 46px; }
.faq .a p { margin: 0 0 10px; }
.faq .a p:last-child { margin: 0; }

/* 誘導 */
.cta { background: var(--teal-l); border-top: 1px solid #d5efec; border-bottom: 1px solid #d5efec; padding: 56px 0; }
.cta .in { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta h2 { font-size: clamp(20px, 2.2vw, 28px); font-weight: 900; line-height: 1.4; margin: 8px 0 0; }
.cta p { color: var(--body); margin: 10px 0 0; line-height: 1.9; }
.related { padding: 56px 0 72px; }
.related h2 { font-size: 20px; font-weight: 900; margin: 0 0 18px; }
.rgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.rgrid a { padding: 20px 22px; display: block; }
.rgrid a b { display: block; font-size: 16px; margin-bottom: 6px; }
.rgrid a small { font-size: 13px; color: var(--muted); line-height: 1.7; }
.rgrid a:hover { border-color: var(--navy); }

/* フッター（トップページと同じ） */
footer { background: var(--ink); color: #d1d5db; padding: 40px 0; }
.fgrid2 { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.fgrid2 img { height: 40px; width: auto; }
.fgrid2 nav { display: flex; align-items: center; gap: 24px; font-size: 13px; flex-wrap: wrap; }
.fgrid2 nav a { color: #d1d5db; }
.copy { margin-top: 20px; font-size: 12px; color: #9ca3af; }

@media (max-width: 960px) {
  .article { grid-template-columns: 1fr; gap: 32px; }
  .side { position: static; }
  .rgrid { grid-template-columns: 1fr; }
  .nav nav { display: none; }
  .nav .menu-toggle { display: inline-flex; }
  .nav nav.open { display: flex; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: #fff; border-bottom: 1px solid var(--line); padding: 12px 20px 16px; gap: 14px; }
}
@media (max-width: 600px) {
  .wrap { width: min(1160px, 100% - 32px); }
  .ba { grid-template-columns: 1fr; }
  .ba svg { transform: rotate(90deg); }
  .body table { font-size: 14px; }
  .body th, .body td { padding: 10px; }
}