/* ============================================================
   デザイントークン — ロゴの黒・金・紙白から採取
   ============================================================ */
:root{
  --paper:      #F7F5F0;
  --paper-sunk: #EFEAE0;
  --ink:        #16130E;
  --ink-70:     #4E483D;
  --ink-40:     #8D8677;
  --rule:       #DDD6C6;
  --gold:       #A98A4B;
  --gold-lit:   #C6AA71;
  --gold-pale:  #E7DCC4;

  --latin: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Times New Roman", serif;
  --jp-serif: "Yu Mincho", YuMincho, "Hiragino Mincho ProN", "Noto Serif JP", "MS PMincho", serif;
  --jp-sans:  "Yu Gothic", YuGothic, "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Meiryo", sans-serif;

  --gutter: clamp(20px, 5vw, 80px);
  --sec-y:  clamp(72px, 9.5vw, 140px);
}

/* ============================================================
   ベース
   ============================================================ */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--jp-sans);
  font-size:15px;
  line-height:2.05;
  letter-spacing:.04em;
  font-feature-settings:"palt" 1;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,p,dl,dd,dt,figure{ margin:0; padding:0; }
ul,ol{ list-style:none; margin:0; padding:0; }
:focus-visible{ outline:2px solid var(--gold); outline-offset:3px; }

.wrap{ width:100%; max-width:1080px; margin-inline:auto; padding-inline:var(--gutter); }
.wrap--narrow{ max-width:800px; }
.section{ padding-block:var(--sec-y); }
.section--sunk{ background:var(--paper-sunk); }

/* ============================================================
   欧文ロゴタイプ（スモールキャップ＋広い字送り）
   ============================================================ */
.wordmark{ display:inline-flex; align-items:baseline; gap:.6em; }
.wordmark__n{
  font-family:var(--latin);
  font-variant-caps:all-small-caps;
  font-size:19px; letter-spacing:.16em; line-height:1;
}
.wordmark__s{
  font-family:var(--latin);
  font-variant-caps:all-small-caps;
  font-size:11px; letter-spacing:.3em; color:var(--gold); line-height:1;
}

/* ============================================================
   ヘッダー
   ============================================================ */
.hdr{
  position:fixed; inset:0 0 auto 0; z-index:60;
  background:color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter:saturate(1.15) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .35s ease;
}
.hdr.is-scrolled{ border-bottom-color:var(--rule); }
.hdr__in{ display:flex; align-items:center; justify-content:space-between; gap:24px; height:70px; }

.nav{ display:flex; gap:clamp(18px,3vw,42px); }
.nav__link{
  position:relative; font-size:13px; letter-spacing:.1em;
  color:var(--ink-70); padding-block:7px; transition:color .28s ease;
}
.nav__link::after{
  content:""; position:absolute; left:0; bottom:0; width:100%; height:1px;
  background:var(--gold); transform:scaleX(0); transform-origin:right;
  transition:transform .38s cubic-bezier(.2,.7,.3,1);
}
.nav__link:hover{ color:var(--ink); }
.nav__link:hover::after,
.nav__link.is-active::after{ transform:scaleX(1); transform-origin:left; }
.nav__link.is-active{ color:var(--ink); }

.menu-btn{ display:none; width:40px; height:40px; margin-right:-8px; background:none; border:0; padding:0; cursor:pointer; }
.menu-btn span{ display:block; width:20px; height:1px; background:var(--ink); margin:5px auto; transition:transform .3s ease, opacity .3s ease; }
.menu-btn.is-open span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.menu-btn.is-open span:nth-child(2){ opacity:0; }
.menu-btn.is-open span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

@media (max-width:780px){
  .menu-btn{ display:block; }
  .nav{
    position:fixed; inset:70px 0 auto 0; flex-direction:column; gap:0;
    background:var(--paper); border-bottom:1px solid var(--rule);
    padding:8px var(--gutter) 22px;
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:opacity .25s ease, transform .25s ease;
  }
  .nav.is-open{ transform:none; opacity:1; pointer-events:auto; }
  .nav__link{ padding-block:14px; border-bottom:1px solid var(--rule); font-size:14px; }
  .nav__link::after{ display:none; }
  .nav__link.is-active{ color:var(--gold); }
}

/* ============================================================
   ページ切り替え
   ============================================================ */
main{ padding-top:70px; }
.page{ display:block; }
@keyframes pageIn{ from{ opacity:0; transform:translateY(10px);} to{ opacity:1; transform:none;} }

/* ============================================================
   ヒーロー
   ============================================================ */
.hero{
  min-height:clamp(560px, 84vh, 820px);
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center; padding-block:clamp(48px,8vh,80px);
}
/* ロゴマーク＋社名（社名は文字で組み、拡大しても崩れないようにする） */
.lockup{
  display:flex; flex-direction:column; align-items:center;
  width:min(440px, 78vw); margin:0; font-weight:400;
}
.lockup__emblem{
  width:100%;
  opacity:0; transform:translateY(14px) scale(.985);
  animation:heroIn 1.2s cubic-bezier(.2,.7,.3,1) .15s both;
}
@keyframes heroIn{ to{ opacity:1; transform:none; } }

.lockup__name{
  font-family:var(--latin); font-variant-caps:all-small-caps;
  font-size:clamp(28px, 6.6vw, 55px); letter-spacing:.1em; line-height:1;
  margin-top:.34em; white-space:nowrap;
  opacity:0; animation:fadeUp .9s ease .75s both;
}
.lockup__ltd{
  display:flex; align-items:center; width:100%; gap:.9em;
  margin-top:.5em; color:var(--gold);
  opacity:0; animation:fadeUp .9s ease .95s both;
}
.lockup__ltd::before,.lockup__ltd::after{
  content:""; height:1px; flex:1;
  background:linear-gradient(to right, transparent, var(--gold-lit));
}
.lockup__ltd::after{ background:linear-gradient(to left, transparent, var(--gold-lit)); }
.lockup__ltd-t{
  font-family:var(--latin); font-variant-caps:all-small-caps;
  font-size:clamp(13px, 2.2vw, 19px); letter-spacing:.42em;
  line-height:1; text-indent:.42em;
}

.hero__rule{
  width:1px; height:clamp(40px,7vh,72px);
  background:linear-gradient(to bottom, var(--gold-pale), var(--gold));
  margin-block:clamp(28px,5vh,48px);
  transform-origin:top; transform:scaleY(0);
  animation:ruleIn .9s cubic-bezier(.6,0,.2,1) .85s both;
}
@keyframes ruleIn{ to{ transform:scaleY(1); } }

.hero__catch{
  font-family:var(--jp-serif); font-weight:600;
  font-size:clamp(21px, 3.6vw, 38px);
  line-height:1.85; letter-spacing:.14em;
  opacity:0; animation:fadeUp .9s ease 1.15s both;
}
.hero__desc{
  margin-top:clamp(22px,3.4vh,34px);
  max-width:30em; font-size:14px; line-height:2.3; color:var(--ink-70);
  opacity:0; animation:fadeUp .9s ease 1.4s both;
}
@keyframes fadeUp{ from{ opacity:0; transform:translateY(12px);} to{ opacity:1; transform:none;} }

/* ============================================================
   装飾 — 台座の雷文をそのまま罫の中央に置く
   ============================================================ */
.orn{
  display:flex; align-items:center; justify-content:center; gap:10px;
  color:var(--gold);
}
.orn::before,.orn::after{
  content:""; height:1px; flex:1; max-width:220px;
  background:linear-gradient(to right, transparent, var(--gold-lit));
}
.orn::after{ background:linear-gradient(to left, transparent, var(--gold-lit)); }
.orn__key{ width:17px; height:17px; flex:none; }
.orn__key--flip{ transform:scaleX(-1); }

/* ============================================================
   セクション見出し（軸対称）
   ============================================================ */
.head{ text-align:center; }
.head__eb{
  display:block; font-family:var(--latin); font-variant-caps:all-small-caps;
  font-size:12px; letter-spacing:.3em; color:var(--gold); line-height:1; margin-bottom:20px;
}
.head__t{
  font-family:var(--jp-serif); font-weight:600;
  font-size:clamp(23px, 3.2vw, 34px); line-height:1.7; letter-spacing:.1em;
}
.head__d{
  margin:26px auto 0; max-width:32em;
  font-family:var(--jp-serif); font-size:clamp(15px,1.8vw,17px);
  line-height:2.4; letter-spacing:.08em; color:var(--ink-70);
}

/* ============================================================
   事業
   ============================================================ */
.cols{
  display:grid; grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--rule); margin-top:clamp(48px,7vw,76px);
}
.col{ padding:38px clamp(16px,2.4vw,30px) 42px 0; border-bottom:1px solid var(--rule); }
.col + .col{ border-left:1px solid var(--rule); padding-left:clamp(20px,2.8vw,34px); }
.col__eb{
  display:block; font-family:var(--latin); font-variant-caps:all-small-caps;
  font-size:11px; letter-spacing:.24em; color:var(--gold); margin-bottom:16px; line-height:1;
}
.col__t{ font-family:var(--jp-serif); font-size:19px; font-weight:600; letter-spacing:.08em; line-height:1.7; margin-bottom:14px; }
.col__d{ font-size:13.5px; line-height:2.1; color:var(--ink-70); }
@media (max-width:780px){
  .cols{ grid-template-columns:1fr; }
  .col{ padding:30px 0 32px; }
  .col + .col{ border-left:0; padding-left:0; }
}

/* ============================================================
   テキストリンク
   ============================================================ */
.tlink{
  display:inline-flex; align-items:center; gap:12px;
  font-family:var(--latin); font-variant-caps:all-small-caps;
  font-size:14px; letter-spacing:.18em; color:var(--gold);
  border-bottom:1px solid var(--gold-pale); padding-bottom:7px;
  transition:border-color .3s ease, gap .3s ease;
}
.tlink:hover{ border-bottom-color:var(--gold); gap:19px; }
.tlink__jp{ font-family:var(--jp-sans); font-variant-caps:normal; font-size:13px; letter-spacing:.1em; }
.center-act{ text-align:center; margin-top:clamp(40px,6vw,60px); }

/* ============================================================
   会社概要
   ============================================================ */
.dl{ border-top:1px solid var(--rule); margin-top:clamp(44px,6vw,66px); }
.dl__row{
  display:grid; grid-template-columns:minmax(130px,190px) 1fr;
  gap:clamp(14px,4vw,44px); padding-block:22px; border-bottom:1px solid var(--rule);
}
.dl__k{ font-size:12.5px; letter-spacing:.14em; color:var(--ink-40); line-height:2.1; }
.dl__v{ font-size:14.5px; line-height:2.15; }
.dl__v .num{ font-family:var(--latin); font-size:15.5px; letter-spacing:.06em; }
@media (max-width:620px){ .dl__row{ grid-template-columns:1fr; gap:2px; padding-block:18px; } }

/* 沿革 */
.hist{ border-top:1px solid var(--rule); margin-top:clamp(44px,6vw,66px); }
.hist__row{
  display:grid; grid-template-columns:minmax(92px,132px) 1fr;
  gap:clamp(14px,4vw,44px); padding-block:20px; border-bottom:1px solid var(--rule);
}
.hist__y{ font-family:var(--latin); font-size:15px; letter-spacing:.1em; color:var(--gold); line-height:2.1; }
.hist__t{ font-size:14px; line-height:2.1; color:var(--ink-70); }
@media (max-width:620px){ .hist__row{ grid-template-columns:1fr; gap:0; } }

/* ============================================================
   コンセプト
   ============================================================ */
.story{ text-align:center; max-width:40em; margin-inline:auto; }
.story__t{
  font-family:var(--jp-serif); font-weight:600;
  font-size:clamp(20px,2.8vw,29px); line-height:1.8; letter-spacing:.12em;
  margin-bottom:28px;
}
.story__p{
  font-family:var(--jp-serif); font-size:clamp(15px,1.75vw,16.5px);
  line-height:2.5; letter-spacing:.09em; color:var(--ink-70);
}
.story__p + .story__p{ margin-top:24px; }

.beliefs{ margin-top:clamp(52px,7vw,80px); }
.belief{
  border-top:1px solid var(--rule);
  padding-block:clamp(30px,4.6vw,52px);
  display:grid; grid-template-columns:minmax(0,5fr) minmax(0,6fr);
  gap:clamp(18px,5vw,60px);
}
.belief:last-child{ border-bottom:1px solid var(--rule); }
.belief__t{ font-family:var(--jp-serif); font-weight:600; font-size:clamp(19px,2.4vw,26px); line-height:1.8; letter-spacing:.1em; }
.belief__d{ font-size:14.5px; line-height:2.3; color:var(--ink-70); }
@media (max-width:860px){ .belief{ grid-template-columns:1fr; } }

/* 進め方（実際に順序があるので番号を使う） */
.flow{ display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid var(--rule); margin-top:clamp(48px,7vw,72px); }
.flow__s{ padding:34px clamp(14px,2vw,26px) 38px 0; border-bottom:1px solid var(--rule); }
.flow__s + .flow__s{ border-left:1px solid var(--rule); padding-left:clamp(18px,2.4vw,28px); }
.flow__n{ display:block; font-family:var(--latin); font-size:15px; letter-spacing:.2em; color:var(--gold); margin-bottom:16px; }
.flow__t{ font-family:var(--jp-serif); font-size:18px; font-weight:600; letter-spacing:.09em; margin-bottom:12px; }
.flow__d{ font-size:13px; line-height:2; color:var(--ink-70); }
@media (max-width:860px){ .flow{ grid-template-columns:1fr 1fr; } .flow__s:nth-child(3){ border-left:0; padding-left:0; } }
@media (max-width:540px){ .flow{ grid-template-columns:1fr; } .flow__s{ padding:26px 0 28px; } .flow__s + .flow__s{ border-left:0; padding-left:0; } }

/* ============================================================
   問い合わせ
   ============================================================ */
.contact{
  display:grid; grid-template-columns:minmax(0,4fr) minmax(0,7fr);
  gap:clamp(34px,6vw,84px); align-items:start;
  margin-top:clamp(48px,7vw,76px);
}
@media (max-width:880px){ .contact{ grid-template-columns:1fr; } }

.direct{ border-top:1px solid var(--rule); }
.direct__row{ padding-block:18px; border-bottom:1px solid var(--rule); }
.direct__k{
  display:block; font-family:var(--latin); font-variant-caps:all-small-caps;
  font-size:11px; letter-spacing:.26em; color:var(--gold); margin-bottom:5px; line-height:1;
}
.direct__v{ font-size:15px; letter-spacing:.05em; }
.direct__v a{ border-bottom:1px solid var(--rule); padding-bottom:2px; transition:border-color .3s; }
.direct__v a:hover{ border-bottom-color:var(--gold); }

.field{ margin-bottom:28px; }
.field__l{ display:flex; align-items:center; gap:10px; font-size:12.5px; letter-spacing:.13em; color:var(--ink-70); margin-bottom:10px; }
.req{ font-family:var(--latin); font-variant-caps:all-small-caps; font-size:11px; letter-spacing:.14em; color:var(--gold); border:1px solid var(--gold-pale); padding:2px 7px; line-height:1.5; }
.opt{ font-family:var(--latin); font-variant-caps:all-small-caps; font-size:11px; letter-spacing:.14em; color:var(--ink-40); border:1px solid var(--rule); padding:2px 7px; line-height:1.5; }

.input,.select,.textarea{
  width:100%; font-family:inherit; font-size:15px; color:var(--ink);
  background:transparent; border:0; border-bottom:1px solid var(--rule);
  padding:10px 2px; line-height:1.9; letter-spacing:.04em;
  border-radius:0; -webkit-appearance:none; appearance:none;
  transition:border-color .3s ease;
}
.textarea{ min-height:150px; resize:vertical; }
.select{
  background-image:linear-gradient(45deg,transparent 50%,var(--gold) 50%),
                   linear-gradient(135deg,var(--gold) 50%,transparent 50%);
  background-position:calc(100% - 12px) 21px, calc(100% - 7px) 21px;
  background-size:5px 5px, 5px 5px; background-repeat:no-repeat; cursor:pointer;
}
.input:focus,.select:focus,.textarea:focus{ outline:none; border-bottom-color:var(--gold); }
.input.is-error,.select.is-error,.textarea.is-error{ border-bottom-color:#9C3B2C; }
.err{ display:none; font-size:12px; color:#9C3B2C; letter-spacing:.06em; margin-top:8px; line-height:1.8; }
.err.is-shown{ display:block; }

.check{ display:flex; gap:12px; align-items:flex-start; font-size:13px; line-height:2; color:var(--ink-70); cursor:pointer; }
.check input{
  appearance:none; -webkit-appearance:none; width:16px; height:16px; margin:8px 0 0;
  flex:none; border:1px solid var(--ink-40); background:transparent; cursor:pointer;
  transition:background .2s, border-color .2s;
}
.check input:checked{ background:var(--gold); border-color:var(--gold); }
.check input:checked::after{
  content:""; display:block; width:4px; height:8px;
  border:solid var(--paper); border-width:0 1.5px 1.5px 0;
  transform:rotate(45deg); margin:2px auto 0;
}

.btn{
  font-family:var(--jp-sans); font-size:13.5px; letter-spacing:.18em; color:var(--paper);
  background:var(--ink); border:1px solid var(--ink);
  padding:18px 54px; margin-top:38px; cursor:pointer; border-radius:0;
  transition:background .3s ease, border-color .3s ease, color .3s ease;
}
.btn:hover{ background:var(--gold); border-color:var(--gold); }
.note{ font-size:12.5px; line-height:2; color:var(--ink-40); margin-top:18px; max-width:34em; }

.sent{ border-top:1px solid var(--gold-pale); border-bottom:1px solid var(--gold-pale); padding:44px 0; display:none; }
.sent.is-shown{ display:block; animation:pageIn .5s ease both; }
.sent__t{ font-family:var(--jp-serif); font-size:22px; font-weight:600; letter-spacing:.1em; margin-bottom:14px; }
.sent__d{ font-size:14px; line-height:2.2; color:var(--ink-70); }
.sent__mail{ margin-top:18px; }
.sent__mail a{
  font-family:var(--latin); font-size:19px; letter-spacing:.05em; color:var(--gold);
  border-bottom:1px solid var(--gold-pale); padding-bottom:4px;
  transition:border-color .3s ease;
}
.sent__mail a:hover{ border-bottom-color:var(--gold); }
.sent__acts{ display:flex; flex-wrap:wrap; gap:12px 32px; margin-top:30px; }

/* ============================================================
   下部の呼びかけ — 金のアーチ
   ============================================================ */
.cta{ border-top:1px solid var(--rule); padding-block:clamp(64px,9vw,120px); text-align:center; }
.cta__arch{ width:min(320px,60vw); height:auto; color:var(--gold-lit); margin:0 auto clamp(24px,4vw,38px); display:block; }
.cta__arch path{ stroke-dasharray:640; stroke-dashoffset:640; }
.cta.is-in .cta__arch path{ animation:draw 1.6s cubic-bezier(.4,0,.2,1) .1s both; }
@keyframes draw{ to{ stroke-dashoffset:0; } }
.cta__t{ font-family:var(--jp-serif); font-weight:600; font-size:clamp(21px,3vw,32px); letter-spacing:.11em; line-height:1.75; }
.cta__d{ font-size:14px; color:var(--ink-70); margin-top:20px; }

/* ============================================================
   フッター
   ============================================================ */
.ftr{ background:var(--ink); color:var(--paper); padding-block:clamp(44px,6vw,64px); }
.ftr__in{ display:flex; justify-content:space-between; align-items:flex-end; gap:28px; flex-wrap:wrap; }
.ftr .wordmark__n{ font-size:20px; }
.ftr .wordmark__s{ color:var(--gold-lit); }
.ftr__a{ font-size:12.5px; line-height:2; color:#A69E8E; margin-top:16px; }
.ftr__c{ font-family:var(--latin); font-variant-caps:all-small-caps; font-size:12px; letter-spacing:.2em; color:#7C7566; }

/* ============================================================
   スクロール表示
   ============================================================ */
.rise{ opacity:0; transform:translateY(16px); transition:opacity .85s ease, transform .85s cubic-bezier(.2,.7,.3,1); }
.rise.is-in{ opacity:1; transform:none; }

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{ animation-duration:.001ms !important; animation-delay:0ms !important; transition-duration:.001ms !important; }
  html{ scroll-behavior:auto; }
  .rise{ opacity:1; transform:none; }
  .lockup__emblem,.lockup__name,.lockup__ltd,.hero__catch,.hero__desc{ opacity:1; transform:none; }
  .hero__rule{ transform:none; }
  .cta__arch path{ stroke-dashoffset:0; }
}