:root {
  --bg: #f4f1ec;
  --ink: #2b2a27;
  --ink-soft: #6b6862;
  --line: #d8d3ca;
  --accent: #7a4a5a;
  --accent-wash: rgba(122, 74, 90, .07);
  --paper: rgba(255, 255, 255, .34);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Songti SC", "Noto Serif SC", Georgia, serif;
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
.page {
  max-width: 620px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}
.home-page { max-width: 660px; }
a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line); transition: border-color .2s, color .2s; }
a:hover { border-color: var(--accent); color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 2px; }

.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 64px; gap: 12px; }
.now {
  display: inline-block;
  font-size: 13px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 14px;
  letter-spacing: .02em;
}
.now span { color: var(--ink); }
.lang {
  font-size: 13px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 3px 10px;
  color: var(--ink-soft);
  white-space: nowrap;
}
.lang { border-bottom: 1px solid var(--line); }
.lang:hover { color: var(--accent); }

h1 { font-size: 20px; font-weight: 600; letter-spacing: .08em; margin-bottom: 24px; }
.intro .identity { margin-bottom: 22px; color: var(--accent); font-size: 13px; letter-spacing: .12em; }
.intro .thesis { max-width: 590px; margin-bottom: 18px; font-size: 21px; font-weight: 600; line-height: 1.7; letter-spacing: -.01em; }
.intro .bridge { max-width: 610px; color: var(--ink-soft); font-size: 15px; line-height: 1.95; }
.intro .location { margin-top: 9px; color: var(--ink-soft); font-size: 12px; letter-spacing: .04em; }

.direction-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 30px; padding: 15px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.direction-nav a { border: none; color: var(--ink-soft); font-size: 13px; letter-spacing: .04em; }
.direction-nav a:hover { color: var(--accent); }
.direction-nav span { margin-right: 3px; color: var(--accent); font-family: Arial, sans-serif; font-size: 10px; letter-spacing: .08em; }

.social { margin-top: 20px; font-size: 14px; color: var(--ink-soft); }
.social a { margin-right: 4px; }
.social .dot { margin: 0 8px; color: var(--line); }

.divider { border: none; border-top: 1px solid var(--line); margin: 72px 0 0; }

section { margin-bottom: 72px; }
.label {
  font-size: 12px;
  letter-spacing: .25em;
  color: var(--ink-soft);
  margin-bottom: 28px;
}
.home-page .label { margin-bottom: 16px; }
.direction { margin: 0; padding: 72px 0; }
.direction + .direction { border-top: 1px solid var(--line); }
.direction-head h2, .method h2 { margin: 0; font-size: 29px; font-weight: 600; line-height: 1.35; letter-spacing: -.03em; }
.direction-kicker { margin-top: 6px; color: var(--accent); font-size: 15px; }
.direction-intro { max-width: 610px; margin-top: 18px; color: var(--ink-soft); font-size: 15px; line-height: 1.95; }
.project-list { margin-top: 38px; }
.project-list.compact-list { margin-top: 24px; }
.item { margin-bottom: 30px; }
.item:last-child { margin-bottom: 0; }
.item-top { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.item .t { margin: 0; font-size: 16px; font-weight: 600; line-height: 1.6; }
.item .d { margin-top: 5px; color: var(--ink-soft); font-size: 15px; line-height: 1.85; }
.item .meta { margin-top: 10px; color: var(--accent); font-size: 11px; letter-spacing: .08em; }
.status { flex: 0 0 auto; padding: 2px 9px; border: 1px solid rgba(122, 74, 90, .24); border-radius: 999px; background: var(--accent-wash); color: var(--accent); font-size: 10px; letter-spacing: .06em; line-height: 1.65; white-space: nowrap; }
.featured-project { padding: 21px 22px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); }
.featured-project .t a::after { content: " →"; color: var(--accent); }
.unlinked-feature { border-style: dashed; }

.growing-note { margin-top: 34px; padding: 15px 18px 16px; border-left: 2px solid var(--accent); background: var(--accent-wash); }
.growing-label { margin-bottom: 5px; color: var(--accent); font-size: 10px; letter-spacing: .16em; }
.growing-note h3 { font-size: 16px; font-weight: 600; }
.growing-note p { margin-top: 4px; color: var(--ink-soft); font-size: 14px; line-height: 1.8; }

.method { margin: 0; padding: 72px 0; border-top: 1px solid var(--line); }
.method-card { padding: 23px 24px 8px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); }
.method-intro { margin-top: 12px; color: var(--ink-soft); font-size: 15px; line-height: 1.85; }
.method-lines { margin-top: 22px; border-top: 1px dashed var(--line); }
.method-line { display: grid; grid-template-columns: 100px 1fr; gap: 18px; padding: 13px 0; border-bottom: 1px dashed var(--line); font-size: 13px; line-height: 1.7; }
.method-line:last-child { border-bottom: none; }
.method-line strong { font-weight: 600; }
.method-line span { color: var(--ink-soft); }

.contact { margin: 0; padding-top: 72px; border-top: 1px solid var(--line); }
.contact p { margin-bottom: 8px; font-size: 15px; }
.contact .mail { font-size: 15px; }

footer { margin-top: 96px; font-size: 12px; color: var(--ink-soft); }

body.en {
  font-family: Georgia, "Times New Roman", serif;
}

.case-page { max-width: 840px; }
.case-nav { display: flex; justify-content: space-between; align-items: center; margin-bottom: 72px; font-size: 13px; }
.case-nav a { color: var(--ink-soft); }
.case-kicker { margin-bottom: 18px; color: var(--accent); font-family: Arial, sans-serif; font-size: 12px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.case-title { max-width: 720px; margin: 0; font-size: clamp(38px, 7vw, 68px); font-weight: 600; line-height: 1.12; letter-spacing: -.045em; }
.case-lead { max-width: 700px; margin-top: 30px; color: var(--ink-soft); font-size: 19px; line-height: 1.75; }
.case-date { margin-top: 22px; color: var(--ink-soft); font-size: 12px; }
.case-metrics { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin: 52px 0 18px; }
.case-metric { padding: 18px 12px; border: 1px solid var(--line); border-radius: 9px; background: rgba(255,255,255,.38); }
.case-metric strong { display: block; color: var(--accent); font-family: Arial, sans-serif; font-size: 28px; letter-spacing: -.04em; }
.case-metric span { display: block; margin-top: 5px; color: var(--ink-soft); font-size: 11px; line-height: 1.45; }
.case-caption { color: var(--ink-soft); font-size: 12px; line-height: 1.6; }
.case-section { margin-top: 82px; margin-bottom: 0; }
.case-section h2 { margin: 0 0 22px; font-size: 24px; letter-spacing: -.02em; }
.case-section p { margin-bottom: 16px; }
.case-section .muted { color: var(--ink-soft); }
.case-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-top: 30px; }
.case-flow div { position: relative; min-height: 96px; padding: 14px 12px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.35); color: var(--ink-soft); font-size: 12px; line-height: 1.55; }
.case-flow div:not(:last-child)::after { content: "→"; position: absolute; top: 36px; right: -9px; z-index: 1; color: var(--accent); }
.capabilities { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.capability { padding: 20px; border-top: 2px solid var(--accent); background: rgba(255,255,255,.28); }
.capability strong { display: block; margin-bottom: 8px; }
.capability p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.evidence-line { margin-top: 26px; padding: 20px 22px; border-left: 3px solid var(--accent); background: rgba(122,74,90,.06); }
.evidence-line strong { display: block; margin-bottom: 5px; }
.privacy-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 28px; }
.privacy-card { padding: 22px; border: 1px solid var(--line); border-radius: 9px; }
.privacy-card.safe { border-top: 3px solid #5a8a76; }
.privacy-card.blocked { border-top: 3px solid #a65767; }
.privacy-card h3 { margin: 0 0 12px; font-size: 16px; }
.privacy-card ul { margin: 0; padding-left: 18px; color: var(--ink-soft); font-size: 14px; }
.privacy-card li { margin: 8px 0; }
.case-next { margin-top: 72px; padding-top: 32px; border-top: 1px solid var(--line); }
.case-next h2 { margin-bottom: 14px; }
.case-footer { display: flex; justify-content: space-between; gap: 20px; margin-top: 88px; color: var(--ink-soft); font-size: 12px; }

@media (max-width: 720px) {
  .home-page { padding: 32px 20px 72px; }
  .home-page .topbar { align-items: flex-start; margin-bottom: 52px; }
  .home-page .now { padding: 4px 11px; font-size: 11px; line-height: 1.7; }
  .intro .identity { margin-bottom: 18px; font-size: 12px; letter-spacing: .09em; }
  .intro .thesis { font-size: 19px; line-height: 1.75; }
  .intro .bridge, .direction-intro { font-size: 14px; line-height: 1.9; }
  .direction-nav { gap: 7px 16px; }
  .direction-nav a { font-size: 12px; }
  .social { font-size: 13px; }
  .social .dot { margin: 0 5px; }
  .divider { margin-top: 60px; }
  .direction, .method { padding: 60px 0; }
  .direction-head h2, .method h2 { font-size: 26px; }
  .direction-kicker { font-size: 14px; }
  .project-list { margin-top: 32px; }
  .item-top { align-items: flex-start; flex-direction: column; gap: 6px; }
  .item .d { font-size: 14px; }
  .featured-project { padding: 18px; }
  .growing-note { margin-top: 30px; }
  .method-card { padding: 20px 18px 6px; }
  .method-intro { font-size: 14px; }
  .method-line { grid-template-columns: 1fr; gap: 2px; }
  .contact { padding-top: 60px; }
  .contact p { font-size: 14px; }
  footer { margin-top: 72px; }

  .case-metrics { grid-template-columns: 1fr 1fr; }
  .case-metric:last-child { grid-column: 1 / -1; }
  .case-flow { grid-template-columns: 1fr; }
  .case-flow div { min-height: 0; }
  .case-flow div:not(:last-child)::after { content: "↓"; top: auto; right: 14px; bottom: -13px; }
  .capabilities, .privacy-pair { grid-template-columns: 1fr; }
  .case-footer { display: block; }
}