/* winchesterhouse.jp */
:root {
  --rail: #16324a;
  --railText: #e9eef2;
  --railMuted: #a9b8c4;
  --ink: #23282f;
  --inkSub: #5d6670;
  --paper: #ffffff;
  --mist: #eef2f5;
  --line: #dde3e8;
  --link: #1d5a7a;
  --gold: #a88a46;
  --goldSoft: #d9c79c;
  --serif: "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Noto Serif JP", "BIZ UDPMincho", serif;
  --sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 2;
  font-feature-settings: "palt" 0;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: #133f57; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.visuallyHidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 枠組み ---------- */
.pageFrame { min-height: 100vh; }

.siteRail {
  background: var(--rail);
  color: var(--railText);
  font-family: var(--sans);
}
.railToggle { position: absolute; opacity: 0; width: 1px; height: 1px; }
.railHead { padding: 14px 16px; display: flex; align-items: center; gap: 12px; }
.railBrand {
  color: #fff; text-decoration: none; font-family: var(--serif);
  font-size: 16px; line-height: 1.5; letter-spacing: .02em; flex: 1;
}
.railBrand:hover { color: var(--goldSoft); }
.railCatch { display: none; }
.railMenuBtn {
  flex: none; cursor: pointer; font-size: 12px; letter-spacing: .1em;
  border: 1px solid rgba(217, 199, 156, .6); color: var(--goldSoft);
  padding: 4px 12px; border-radius: 4px; line-height: 1.6;
}
.railToggle:focus-visible ~ .railHead .railMenuBtn { outline: 2px solid var(--goldSoft); outline-offset: 2px; }
.railNav { display: none; padding: 0 16px 20px; }
.railToggle:checked ~ .railNav { display: block; }
.railLabel {
  margin: 0 0 6px; font-size: 11px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--gold); border-top: 1px solid rgba(255, 255, 255, .12); padding-top: 14px;
}
.railList { list-style: none; margin: 0; padding: 0; }
.railList li { border-bottom: 1px solid rgba(255, 255, 255, .08); }
.railList a, .railPolicy {
  display: block; color: var(--railText); text-decoration: none;
  font-size: 13px; line-height: 1.7; padding: 10px 0;
}
.railList a:hover, .railPolicy:hover { color: var(--goldSoft); }
.railList a[aria-current="page"], .railPolicy[aria-current="page"] { color: var(--goldSoft); }
.railPolicy { margin-top: 10px; font-size: 12px; color: var(--railMuted); }

.mainColumn { padding: 24px 16px 0; }
.mainArea { max-width: 700px; margin: 0 auto; }

@media (min-width: 960px) {
  .pageFrame { display: grid; grid-template-columns: 260px minmax(0, 1fr); }
  .siteRail {
    position: sticky; top: 0; height: 100vh; overflow-y: auto;
    padding: 40px 28px 32px;
  }
  .railHead { display: block; padding: 0 0 28px; }
  .railBrand { display: block; font-size: 19px; line-height: 1.6; }
  .railCatch {
    display: block; margin: 16px 0 0; font-size: 12px; line-height: 1.9; color: var(--railMuted);
    padding-left: 12px; border-left: 2px solid var(--gold);
  }
  .railMenuBtn { display: none; }
  .railNav { display: block; padding: 0; }
  .mainColumn { padding: 56px 48px 0; }
}

/* ---------- 共通部品 ---------- */
.metaLine { margin: 0; font-family: var(--sans); font-size: 12px; letter-spacing: .06em; color: var(--inkSub); }
.metaKey { margin-right: .8em; color: var(--gold); }

.crumbTrail { font-family: var(--sans); font-size: 12px; color: var(--inkSub); margin-bottom: 20px; }
.crumbTrail ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; }
.crumbTrail li { line-height: 1.7; }
.crumbTrail li + li::before { content: "»"; margin: 0 .6em; color: var(--gold); }
.crumbTrail a { color: var(--inkSub); }

/* ---------- TOP ---------- */
.indexIntro { padding-bottom: 28px; margin-bottom: 36px; border-bottom: 1px solid var(--line); }
.indexTitle { margin: 0; font-weight: 600; line-height: 1.5; }
.indexTitleMain { display: block; font-size: clamp(24px, 4.6vw, 32px); letter-spacing: .03em; }
.indexTitleSub { display: block; margin-top: 4px; font-size: 15px; font-weight: 400; color: var(--inkSub); letter-spacing: .12em; }
.indexCatch { margin: 18px 0 0; font-size: 15px; color: var(--gold); letter-spacing: .06em; }

.indexFeature { background: var(--mist); border-radius: 4px; overflow: hidden; margin-bottom: 12px; }
.featureVisual { display: block; max-width: 640px; margin: 0 auto; }
.featureImg { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.featureText { padding: 20px 20px 24px; }
.featureTitle { margin: 0 0 8px; font-size: 22px; line-height: 1.6; font-weight: 600; }
.featureTitle a, .itemTitle a { color: var(--ink); text-decoration: none; }
.featureTitle a:hover, .itemTitle a:hover { color: var(--link); text-decoration: underline; }
.featureExcerpt { margin: 12px 0 0; font-size: 15px; line-height: 1.9; color: var(--inkSub); }

.indexList { list-style: none; margin: 0; padding: 0; }
.indexItem {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 24px 0; border-bottom: 1px solid var(--line);
}
.itemText { flex: 1; min-width: 0; }
.itemTitle { margin: 0 0 6px; font-size: 18px; line-height: 1.6; font-weight: 600; }
.itemExcerpt {
  margin: 8px 0 0; font-size: 14px; line-height: 1.8; color: var(--inkSub);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.itemThumb { flex: none; width: 160px; }
.thumbImg { width: 160px; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 4px; }

@media (max-width: 560px) {
  .indexItem { gap: 14px; }
  .itemThumb, .thumbImg { width: 104px; }
  .itemTitle { font-size: 16px; }
  .itemExcerpt { display: none; }
  .featureTitle { font-size: 19px; }
}

/* ---------- 記事 ---------- */
.storyTitle { margin: 0 0 24px; font-size: clamp(22px, 4.2vw, 30px); line-height: 1.55; font-weight: 600; letter-spacing: .02em; }
.storyVisual { margin: 0 auto; max-width: 640px; }
.storyImg { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 4px; }
.storyDate { margin: 14px 0 32px; text-align: right; }

.storyToc { background: var(--mist); border-radius: 4px; padding: 20px 24px 18px; margin: 0 0 44px; }
.tocLabel { margin: 0 0 8px; font-family: var(--sans); font-size: 13px; letter-spacing: .3em; color: var(--rail); font-weight: 600; }
.tocList { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.tocList li { counter-increment: toc; display: flex; gap: .7em; font-size: 14px; line-height: 1.7; padding: 5px 0; }
.tocList li::before {
  content: counter(toc, decimal-leading-zero); flex: none;
  font-family: var(--sans); font-size: 12px; color: var(--gold); padding-top: 2px; letter-spacing: .04em;
}
.tocList a { color: var(--ink); text-decoration: none; }
.tocList a:hover { color: var(--link); text-decoration: underline; }
@media (min-width: 720px) {
  .tocList { display: grid; grid-template-columns: 1fr 1fr; column-gap: 28px; }
}

.storyBody h2 {
  margin: 56px 0 20px; font-size: 22px; line-height: 1.6; font-weight: 600; letter-spacing: .02em;
}
.storyBody h2::after { content: ""; display: block; width: 48px; height: 2px; background: var(--gold); margin-top: 12px; }
.storyBody h3 {
  margin: 36px 0 12px; font-size: 18px; line-height: 1.6; font-weight: 600;
  padding-left: 12px; border-left: 2px solid var(--gold);
}
.storyBody p { margin: 0 0 1.4em; }
.storyBody a { word-break: break-all; }
.policyDate { text-align: right; font-size: 14px; color: var(--inkSub); }

.relatedBlock { margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--line); }
.relatedHeading { margin: 0 0 12px; font-size: 18px; font-weight: 600; letter-spacing: .08em; }
.relatedList { list-style: none; margin: 0; padding: 0; }
.relatedList li { border-bottom: 1px solid var(--line); }
.relatedList a { display: flex; flex-wrap: wrap; gap: 2px 1em; align-items: baseline; padding: 14px 0 14px 1.6em; text-decoration: none; position: relative; color: var(--ink); }
.relatedList a::before { content: "→"; position: absolute; left: 0; color: var(--gold); font-family: var(--sans); }
.relatedList a:hover .relatedTitle { color: var(--link); text-decoration: underline; }
.relatedTitle { font-size: 15px; line-height: 1.7; }
.relatedDate { font-family: var(--sans); font-size: 12px; color: var(--inkSub); }

/* ---------- 404 ---------- */
.missTitle { margin: 8px 0 16px; font-size: clamp(21px, 4vw, 26px); line-height: 1.6; font-weight: 600; }
.missText { margin: 0 0 24px; color: var(--inkSub); }
.missList { margin: 0 0 24px; padding-left: 1.4em; }
.missList li { margin-bottom: 8px; line-height: 1.7; }
.missBack { font-size: 15px; }

/* ---------- フッター ---------- */
.siteFoot { max-width: 700px; margin: 72px auto 0; padding: 24px 0 32px; border-top: 1px solid var(--line); }
.footNote { margin: 0 0 10px; font-size: 12px; line-height: 1.9; color: var(--inkSub); }
.footMark { margin: 0; font-family: var(--sans); font-size: 11px; letter-spacing: .14em; color: var(--inkSub); }