/* ============================================================
   Tech-st v2 Variant B — "Tricolore Editoriale"
   イタリア三色のみで構成する洗練案（ミラノ・エディトリアル調）
   思想: 白＝紙面そのもの（トリコロールの白）。
         緑と赤は「2本の細い糸」として罫線・線画でのみ走る。
   規律: 塗りは緑のみ・赤は1画面1点・あとは白と黒。
   ============================================================ */

:root {
  --bianco: #fbfaf5;        /* 白＝紙面 */
  --carta: #f3f0e7;         /* 生成りがかった白（交互セクション） */
  --nero: #1a1f1c;          /* 緑がかった黒＝本文 */
  --verde: #12603f;         /* 緑＝主役の糸・ボタン */
  --verde-scuro: #0c3327;   /* 深緑＝ダークセクション */
  --verde-chiaro: #8fbfa4;  /* 淡緑＝ダーク上のラベル */
  --rosso: #be2b33;         /* 赤＝アクセントの糸（1画面1点） */
  --muted: #5f6661;
  --hairline: rgba(26, 31, 28, 0.16);

  --f-serif-ja: "Shippori Mincho", "Noto Serif JP", serif;
  --f-sans-ja: "Noto Sans JP", sans-serif;
  --f-serif-en: "Fraunces", Georgia, serif;
  --f-mono-en: "Space Grotesk", monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --header-h: 76px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* アクセシビリティ：キーボードフォーカスの可視化 */
a:focus-visible, button:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--verde);
  outline-offset: 3px;
}
/* スキップリンク：フォーカス時のみ画面内に表示 */
.visually-hidden:focus {
  left: 12px; top: 12px; z-index: 200;
  background: var(--verde); color: var(--bianco);
  padding: 10px 18px; font-size: 13px;
}
body {
  font-family: var(--f-sans-ja);
  background: var(--bianco);
  color: var(--nero);
  line-height: 2.0;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: min(1200px, 90vw); margin-inline: auto; }
.visually-hidden { position: absolute; left: -9999px; }

/* ---------- トリコロールの罫（署名モチーフ） ----------
   緑・白（=地）・赤 の3本を極細の罫で表現 */
.tricolore {
  display: block; border: 0;
  height: 7px;
  background:
    linear-gradient(var(--verde), var(--verde)) top left / 100% 1.5px no-repeat,
    linear-gradient(var(--rosso), var(--rosso)) bottom left / 100% 1.5px no-repeat;
}
.tricolore--short { width: 64px; }

/* ---------- タイポ ---------- */
.h1-ja {
  font-family: var(--f-serif-ja);
  font-weight: 600;
  font-size: clamp(34px, 5.4vw, 72px);
  line-height: 1.5;
  letter-spacing: 0.08em;
}
.h2-ja {
  font-family: var(--f-serif-ja);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1.65;
  letter-spacing: 0.07em;
}
.h3-ja {
  font-family: var(--f-serif-ja);
  font-weight: 600;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.8;
  letter-spacing: 0.05em;
}
em.filo { font-style: normal; color: var(--rosso); }

.label {
  font-family: var(--f-mono-en);
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--verde);
}
.lead { color: var(--muted); max-width: 42em; font-size: 15px; }
.en-serif { font-family: var(--f-serif-en); font-style: italic; font-weight: 500; color: var(--verde); }
.small { font-size: 12px; color: var(--muted); }
.mono { font-family: var(--f-mono-en); letter-spacing: 0.08em; }

/* 節番号（欄外のエディトリアル番号）
   -webkit-text-stroke 非対応環境（Firefox等）でも読めるよう淡色フォールバック */
.sec-num {
  font-family: var(--f-serif-en);
  font-size: clamp(40px, 4.5vw, 64px);
  font-weight: 500;
  line-height: 1;
  color: rgba(26, 31, 28, 0.12);
  -webkit-text-stroke: 1px var(--hairline);
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 15px 30px;
  font-size: 13.5px; letter-spacing: 0.12em;
  border-radius: 0;
  transition: all 0.35s var(--ease);
}
.btn .arrow { width: 17px; }
.btn--verde { background: var(--verde); color: var(--bianco); }
.btn--verde:hover { background: var(--verde-scuro); transform: translateY(-2px); }
.btn--linea { border: 1px solid var(--nero); color: var(--nero); }
.btn--linea:hover { border-color: var(--verde); color: var(--verde); transform: translateY(-2px); }
.btn--bianco { background: var(--bianco); color: var(--verde-scuro); }
.btn--bianco:hover { transform: translateY(-2px); }
.btn--linea-bianca { border: 1px solid rgba(251, 250, 245, 0.55); color: var(--bianco); }
.btn--linea-bianca:hover { border-color: var(--bianco); transform: translateY(-2px); }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bianco) 92%, transparent);
  backdrop-filter: blur(10px);
}
.site-header::after {
  content: ""; display: block; height: 1px;
  background: var(--hairline);
  transform: scaleY(0); transition: transform 0.3s;
}
.site-header.is-scrolled::after { transform: scaleY(1); }
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
}
.logo {
  font-family: var(--f-mono-en);
  font-weight: 700; font-size: 20px; letter-spacing: 0.02em;
  display: inline-block; line-height: 1.2;
}
.logo .dot { color: var(--rosso); }
.logo small {
  display: block;
  font-family: var(--f-mono-en); font-weight: 400;
  font-size: 8.5px; letter-spacing: 0.3em; color: var(--muted);
  text-transform: uppercase;
}
.nav { display: flex; align-items: center; gap: 34px; }
.nav a {
  font-family: var(--f-mono-en);
  font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase;
  position: relative; padding: 6px 0;
}
.nav a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--verde);
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.35s var(--ease);
}
.nav a:not(.btn):hover::after,
.nav a:not(.btn)[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.nav a:not(.btn)[aria-current="page"] { color: var(--verde); }
.nav .btn { padding: 10px 22px; }
.nav-toggle { display: none; }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: flex; align-items: center;
  overflow: hidden;
  padding: 6vh 0 14vh;
}
.hero__threads { position: absolute; inset: 0; pointer-events: none; }
.hero__threads svg { width: 100%; height: 100%; }
.hero__threads path {
  fill: none;
  stroke-dasharray: 2200; stroke-dashoffset: 2200;
  animation: filo-draw 3s var(--ease) forwards;
}
.hero__threads path:nth-child(1) { stroke: var(--verde); stroke-width: 1.6; opacity: 0.5; }
.hero__threads path:nth-child(2) { stroke: var(--rosso); stroke-width: 1.6; opacity: 0.5; animation-delay: 0.4s; }
@keyframes filo-draw { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) {
  .hero__threads path { animation: none; stroke-dashoffset: 0; }
}
.hero__inner { position: relative; }
.hero__label-row { display: flex; align-items: center; gap: 20px; margin-bottom: 40px; }
.hero__title { max-width: 15em; }
.hero__foot {
  margin-top: 52px;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 40px;
  align-items: end;
}
.hero__en { margin-top: 26px; font-size: 16px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
.hero__scroll {
  margin-top: clamp(48px, 7vh, 84px);
  font-family: var(--f-mono-en); font-size: 10px; letter-spacing: 0.34em;
  color: var(--muted); text-transform: uppercase;
  display: flex; align-items: center; gap: 12px;
}
.hero__scroll::after { content: ""; width: 48px; height: 1px; background: var(--nero); opacity: 0.4; }

/* ---------- セクション共通 ---------- */
.section { padding: clamp(80px, 11vw, 150px) 0; position: relative; }
.section--carta { background: var(--carta); }
/* page-head直後は最初のコンテンツまでの距離を詰める */
.page-head + .section { padding-top: clamp(48px, 6vw, 80px); }
.section__head { margin-bottom: clamp(44px, 6vw, 76px); }
.section__head-row {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 24px;
  padding-bottom: 26px; margin-bottom: 34px;
  border-bottom: 1px solid var(--hairline);
}
.section__head .h2-ja { max-width: 22em; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 02 WHY（深緑・航路） ---------- */
.why {
  background: var(--verde-scuro);
  color: #e9efe7;
  position: relative; overflow: hidden;
  padding: clamp(90px, 12vw, 160px) 0;
}
.why .label { color: var(--verde-chiaro); }
.why .lead { color: #b9cbbd; }
.why__grid {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}
.why__figure svg { width: 100%; height: auto; }
.why__figure .grid-line { stroke: rgba(233, 239, 231, 0.12); stroke-width: 1; }
.why__figure .route {
  stroke: var(--rosso); stroke-width: 1.8; fill: none;
  stroke-dasharray: 5 9;
  animation: route-flow 2.6s linear infinite;
}
.why__figure .route--sub {
  stroke: var(--verde-chiaro); stroke-width: 1; opacity: 0.6;
  stroke-dasharray: 2 10; animation-duration: 4s;
}
@keyframes route-flow { to { stroke-dashoffset: -56; } }
.why__figure .node { fill: #e9efe7; }
.why__figure .node-ring { fill: none; stroke: var(--rosso); stroke-width: 1; }
.why__figure .map-label {
  font-family: var(--f-mono-en); font-size: 11.5px; letter-spacing: 2.5px;
  fill: var(--verde-chiaro);
}
.why__stats {
  display: flex; gap: 0; margin-top: 44px;
  border-top: 1px solid rgba(233, 239, 231, 0.2);
}
.why__stats > div { flex: 1; padding: 24px 20px 0 0; }
.why__stats > div + div { padding-left: 24px; border-left: 1px solid rgba(233, 239, 231, 0.2); }
.why__stats b {
  display: block;
  font-family: var(--f-serif-en); font-weight: 500;
  font-size: clamp(30px, 3.2vw, 42px); color: #fff; line-height: 1.15;
}
.why__stats span {
  display: block; margin-top: 6px;
  font-family: var(--f-mono-en); font-size: 10px; letter-spacing: 0.16em;
  color: var(--verde-chiaro); text-transform: uppercase;
}
.why .source { margin-top: 30px; font-size: 11px; color: #7d978a; }

/* ---------- 03 サービス（罫線3列・カードレス） ---------- */
.servizi { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.servizio {
  padding: 12px 36px 0 0;
  display: flex; flex-direction: column;
  position: relative;
}
.servizio + .servizio { padding-left: 36px; border-left: 1px solid var(--hairline); }
.servizio__num {
  font-family: var(--f-serif-en); font-weight: 500;
  font-size: 40px; line-height: 1; color: var(--verde);
  margin-bottom: 26px;
}
.servizio__title { margin-bottom: 4px; }
.servizio__for {
  font-family: var(--f-mono-en); font-size: 11px; letter-spacing: 0.16em;
  color: var(--muted); text-transform: uppercase; margin-bottom: 18px;
}
.servizio__body { color: var(--muted); font-size: 14px; flex: 1; }
.servizio__list { margin: 22px 0 26px; border-top: 1px solid var(--hairline); }
.servizio__list li {
  font-size: 13px; padding: 9px 0;
  border-bottom: 1px solid var(--hairline);
  display: flex; gap: 12px; align-items: baseline;
}
.servizio__list li::before {
  content: ""; flex: none;
  width: 10px; height: 1px; background: var(--verde);
  transform: translateY(-4px);
}
.servizio__cta a {
  font-family: var(--f-mono-en); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--verde);
  display: inline-flex; align-items: center; gap: 10px;
  padding-bottom: 4px; border-bottom: 1px solid var(--verde);
  transition: gap 0.3s var(--ease);
}
.servizio__cta a:hover { gap: 16px; }

/* ---------- 04 方法論 ---------- */
.metodo { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(36px, 6vw, 90px); }
.metodo__items { border-top: 1px solid var(--hairline); }
.metodo__item {
  display: grid; grid-template-columns: 110px 1fr; gap: 24px;
  padding: 30px 0; border-bottom: 1px solid var(--hairline);
}
.metodo__num { font-family: var(--f-serif-en); font-size: 15px; color: var(--verde); padding-top: 6px; }
.metodo__item h3 { font-family: var(--f-serif-ja); font-weight: 600; font-size: 17px; letter-spacing: 0.05em; margin-bottom: 6px; }
.metodo__item p { color: var(--muted); font-size: 13.5px; }

/* ---------- 05 EVIDENCE ---------- */
.numeri {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--nero); border-bottom: 1px solid var(--hairline);
}
.numeri > div { padding: 34px 24px 30px 0; }
.numeri > div + div { padding-left: 28px; border-left: 1px solid var(--hairline); }
.numeri b {
  display: block;
  font-family: var(--f-serif-en); font-weight: 500;
  font-size: clamp(30px, 3.4vw, 46px); color: var(--nero); line-height: 1.15;
}
.numeri span { display: block; margin-top: 8px; font-size: 11.5px; color: var(--muted); letter-spacing: 0.05em; }

.casi { margin-top: 10px; }
.caso {
  display: grid; grid-template-columns: 140px 1fr auto; gap: 28px; align-items: baseline;
  padding: 26px 0; border-bottom: 1px solid var(--hairline);
}
.caso .anno { font-family: var(--f-serif-en); font-size: 14px; color: var(--verde); letter-spacing: 0.06em; }
.caso h3 { font-family: var(--f-serif-ja); font-weight: 600; font-size: 17.5px; letter-spacing: 0.04em; margin-bottom: 6px; }
.caso p { color: var(--muted); font-size: 13.5px; max-width: 46em; }

/* ---------- 06 textus ---------- */
.marchio { text-align: center; }
.marchio__inner { max-width: 40em; margin-inline: auto; }
.marchio .tricolore--short { margin: 0 auto 36px; }
.marchio .lead { margin-inline: auto; }

/* ---------- 07 CTA ---------- */
.finale {
  background: var(--verde-scuro); color: var(--bianco);
  text-align: center;
  padding: clamp(90px, 11vw, 150px) 0;
  position: relative; overflow: hidden;
}
.finale__threads { position: absolute; inset: 0; pointer-events: none; opacity: 0.5; }
.finale__threads svg { width: 100%; height: 100%; }
.finale .lead { color: #b9cbbd; margin: 22px auto 40px; }
.finale__btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; }
.finale .h2-ja { position: relative; }

/* ---------- フッター ---------- */
.site-footer { background: var(--nero); color: #e6e8e5; padding: 76px 0 40px; }
.site-footer .tricolore { margin-bottom: 56px; }
.site-footer__tagline {
  font-family: var(--f-serif-ja); font-weight: 600;
  font-size: clamp(20px, 2.8vw, 30px); letter-spacing: 0.07em; line-height: 1.7;
  margin-bottom: 56px;
}
.site-footer__grid {
  display: grid; grid-template-columns: minmax(0, 5fr) repeat(3, minmax(0, 2fr));
  gap: 36px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(230, 232, 229, 0.14);
}
.site-footer .logo small { color: #8b928d; }
.site-footer__tag { margin-top: 18px; font-size: 13px; color: #b5bab6; }
.site-footer__list-title {
  font-family: var(--f-mono-en); font-size: 10.5px; letter-spacing: 0.26em;
  color: #8b928d; margin-bottom: 16px; text-transform: uppercase;
}
.site-footer__list li { margin-bottom: 10px; }
.site-footer__list a { font-size: 13px; color: #d4d8d4; }
.site-footer__list a:hover { color: #fff; }
.site-footer__bottom {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding-top: 30px;
  font-family: var(--f-mono-en); font-size: 11px; letter-spacing: 0.1em;
  color: #8b928d; text-transform: uppercase;
}

/* ---------- 下層ページ共通：ページヘッド ---------- */
.page-head {
  padding: clamp(64px, 9vw, 120px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--hairline);
}
.page-head__label-row { display: flex; align-items: center; gap: 20px; margin-bottom: 32px; }
.page-head__breadcrumb {
  font-family: var(--f-mono-en); font-size: 11px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 18px;
}
.page-head__breadcrumb a { color: var(--verde); }
.page-head .lead { margin-top: 26px; }

/* ---------- 定義リスト（会社概要など） ---------- */
.dl { border-top: 1px solid var(--hairline); }
.dl__row {
  display: grid; grid-template-columns: 180px 1fr; gap: 24px;
  padding: 20px 0; border-bottom: 1px solid var(--hairline);
}
.dl__row dt {
  font-family: var(--f-mono-en); font-size: 11.5px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--verde); padding-top: 4px;
}
.dl__row dd { font-size: 14px; }

/* ---------- ステップ（進め方） ---------- */
.passi { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-top: 1px solid var(--hairline); }
.passo { padding: 26px 22px 8px 0; }
.passo + .passo { padding-left: 26px; border-left: 1px solid var(--hairline); }
.passo__num { font-family: var(--f-serif-en); font-size: 14px; color: var(--verde); display: block; margin-bottom: 12px; }
.passo h3 { font-family: var(--f-serif-ja); font-weight: 600; font-size: 15.5px; letter-spacing: 0.04em; margin-bottom: 8px; }
.passo p { color: var(--muted); font-size: 12.5px; line-height: 1.85; }

/* ---------- 2カラム汎用 ---------- */
.due-col { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(36px, 6vw, 90px); align-items: start; }

/* ---------- ロゴウォール（対応スタック等） ---------- */
.logo-wall { display: flex; flex-wrap: wrap; gap: 10px; }
.logo-wall__item {
  font-family: var(--f-mono-en); font-size: 12.5px; letter-spacing: 0.08em;
  border: 1px solid var(--hairline); padding: 10px 18px;
}

/* ---------- フォーム ---------- */
.form { display: grid; gap: 26px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.form__field { display: grid; gap: 8px; }
.form__field label {
  font-size: 13px; letter-spacing: 0.06em;
  display: flex; align-items: center; gap: 10px;
}
.form__field .req, .form__field .opt {
  font-family: var(--f-mono-en); font-size: 10px; letter-spacing: 0.14em;
  padding: 2px 8px;
}
.form__field .req { color: var(--rosso); border: 1px solid color-mix(in srgb, var(--rosso) 45%, transparent); }
.form__field .opt { color: var(--muted); border: 1px solid var(--hairline); }
.form__field input, .form__field select, .form__field textarea {
  font-family: var(--f-sans-ja); font-size: 14px; color: var(--nero);
  background: #fff; border: 1px solid var(--hairline); border-radius: 0;
  padding: 13px 16px;
  transition: border-color 0.3s;
}
.form__field textarea { resize: vertical; line-height: 1.8; }
.form__field input:focus, .form__field select:focus, .form__field textarea:focus {
  outline: none; border-color: var(--verde);
}
.form__footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.form__check { max-width: 30em; }

/* ---------- 記事（コラム本文） ---------- */
.article { max-width: 46em; margin-inline: auto; }
.article__meta {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-family: var(--f-mono-en); font-size: 12px; letter-spacing: 0.1em;
  color: var(--muted);
  padding-bottom: 22px; margin-bottom: 36px;
  border-bottom: 1px solid var(--hairline);
}
.article__meta .tag {
  border: 1px solid var(--hairline); color: var(--verde);
  padding: 3px 12px; font-size: 11px;
}
.article p { margin-bottom: 1.6em; font-size: 15px; }
.article strong { font-weight: 700; color: var(--nero); }
.article h2 {
  font-family: var(--f-serif-ja); font-weight: 600;
  font-size: clamp(20px, 2.4vw, 26px); letter-spacing: 0.05em; line-height: 1.7;
  margin: 2.4em 0 0.9em;
  padding-top: 1.2em;
  border-top: 1px solid var(--hairline);
}
.article h3 {
  font-family: var(--f-serif-ja); font-weight: 600;
  font-size: 17px; letter-spacing: 0.04em;
  margin: 1.8em 0 0.7em; color: var(--verde);
}
.article ul { margin: 0 0 1.6em; padding-left: 0; }
.article ul li {
  position: relative; padding: 6px 0 6px 24px; font-size: 14.5px;
  border-bottom: 1px dashed var(--hairline);
}
.article ul li::before {
  content: ""; position: absolute; left: 2px; top: 1.1em;
  width: 11px; height: 1px; background: var(--verde);
}
.article blockquote {
  margin: 2em 0; padding: 4px 0 4px 26px;
  border-left: 2px solid var(--rosso);
  font-family: var(--f-serif-ja); font-size: 16.5px; letter-spacing: 0.04em;
  color: var(--nero);
}
.article hr { border: 0; height: 1px; background: var(--hairline); margin: 2.6em 0; }
.article a { color: var(--verde); border-bottom: 1px solid color-mix(in srgb, var(--verde) 45%, transparent); }
.article a:hover { border-bottom-color: var(--verde); }
.article__back {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-mono-en); font-size: 12px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--verde) !important;
  border-bottom: 1px solid var(--verde) !important; padding-bottom: 4px;
}

/* ---------- 404 ---------- */
.pagina-404 { padding: clamp(100px, 14vw, 180px) 0; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 980px) {
  .passi { grid-template-columns: 1fr; }
  .passo { padding-right: 0; }
  .passo + .passo { padding-left: 0; border-left: 0; border-top: 1px solid var(--hairline); padding-top: 26px; margin-top: 4px; }
  .due-col { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .dl__row { grid-template-columns: 130px 1fr; }
  .servizi { grid-template-columns: 1fr; }
  .servizio { padding-right: 0; }
  .servizio + .servizio { padding-left: 0; border-left: 0; border-top: 1px solid var(--hairline); padding-top: 36px; margin-top: 36px; }
  .why__grid, .metodo { grid-template-columns: 1fr; }
  .numeri { grid-template-columns: repeat(2, 1fr); }
  .numeri > div:nth-child(odd) { padding-left: 0; border-left: 0; }
  .numeri > div:nth-child(n+3) { border-top: 1px solid var(--hairline); }
  .hero__foot { grid-template-columns: 1fr; }
  .hero__cta { justify-content: flex-start; }
  .caso { grid-template-columns: 1fr; gap: 6px; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    background: var(--bianco);
    flex-direction: column; align-items: stretch;
    padding: 16px 5vw 28px; gap: 0;
    border-bottom: 1px solid var(--hairline);
    transform: translateY(-130%);
    transition: transform 0.45s var(--ease);
    box-shadow: 0 24px 48px rgba(26, 31, 28, 0.10);
  }
  /* タップターゲットを44px級に拡大し、行罫線で区切る */
  .nav a:not(.btn) { padding: 14px 4px; font-size: 13px; border-bottom: 1px solid var(--hairline); }
  .nav .btn { margin-top: 18px; justify-content: center; }
  /* 開いている間は背面スクロールを固定 */
  body.nav-open { overflow: hidden; }
  body.nav-open .nav { transform: none; }
  .nav-toggle {
    display: flex; flex-direction: column; gap: 5px;
    background: none; border: 0; padding: 8px; cursor: pointer;
  }
  .nav-toggle span { width: 22px; height: 1.5px; background: var(--nero); transition: transform 0.3s var(--ease), opacity 0.3s; }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
  .hero { min-height: auto; padding: 9vh 0 13vh; }
  /* 糸の線画が本文に重ならないよう淡くする */
  .hero__threads { opacity: 0.4; }
  .metodo__item { grid-template-columns: 72px 1fr; }
  .site-footer__grid { grid-template-columns: 1fr; }
  /* 統計3列は縦積みに（数字と説明を1行ずつ） */
  .why__stats { flex-direction: column; }
  .why__stats > div { display: flex; align-items: baseline; gap: 16px; padding: 16px 0; }
  .why__stats > div + div { padding-left: 0; border-left: 0; border-top: 1px solid rgba(233, 239, 231, 0.2); }
  .why__stats b { min-width: 110px; }
}

/* ---------- モーション配慮 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero__threads path { animation: none; stroke-dashoffset: 0; }
  .why__figure .route, .why__figure .route--sub { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn { transition: none; }
}

/* 関連記事セクション（2026-07-06 SEO内部リンク強化） */
.related-posts{border-top:1px solid rgba(0,0,0,.08)}
.related-posts__list{list-style:none;margin:18px 0 0;padding:0}
.related-posts__list li{margin:0 0 12px;padding-left:1.2em;position:relative}
.related-posts__list li::before{content:"→";position:absolute;left:0;color:#0F7B4D}
.related-posts__list a{text-decoration:underline;text-underline-offset:3px}
.related-posts__cta{margin-top:22px;font-weight:700}
.related-posts__cta a{color:#0F7B4D}