/* ============ tokens ============ */
:root{
  --ink:#1a1917;
  --sumi:#4b4740;
  --mist:#8b857a;
  --washi:#faf8f4;
  --paper:#fff;
  --line:#e7e1d6;
  --accent:#e3913a;
  --accent-deep:#c2762b;
  --navy:#2e5075;
  --mincho:"Hiragino Mincho ProN","ヒラギノ明朝 ProN","Yu Mincho",YuMincho,"游明朝","Noto Serif JP","Noto Serif CJK JP","Songti SC",serif;
  --gothic:"Hiragino Kaku Gothic ProN","ヒラギノ角ゴ ProN","Yu Gothic",YuGothic,"Noto Sans JP","Noto Sans CJK JP",Meiryo,system-ui,sans-serif;
  --wrap:1140px;
  --pad:clamp(20px,5vw,48px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--sumi);
  font-family:var(--gothic);font-size:16px;line-height:2;
  letter-spacing:.04em;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.mincho{font-family:var(--mincho)}

/* ============ header ============ */
.hd{
  position:fixed;inset:0 0 auto 0;z-index:60;
  transition:background .45s ease, box-shadow .45s ease, padding .45s ease;
  padding:18px 0;
}
.hd-in{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.brand img.mark{height:30px;width:auto;transition:height .45s ease,opacity .3s ease}
.brand img.evo{height:26px;width:auto;opacity:.85;transition:opacity .3s ease}
.brand .mk-d{display:none}
.hd.scrolled{background:rgba(250,248,244,.92);backdrop-filter:saturate(1.6) blur(14px);
  -webkit-backdrop-filter:saturate(1.6) blur(14px);box-shadow:0 1px 0 var(--line);padding:12px 0}
.hd.scrolled .brand img.mark{height:26px}
.hd.scrolled .mk-l{display:none}
.hd.scrolled .mk-d{display:block}

.nav{display:flex;align-items:center;gap:clamp(14px,2.2vw,30px)}
.nav a{font-size:13px;letter-spacing:.12em;color:#fff;opacity:.9;position:relative;padding:6px 0;
  transition:opacity .25s,color .25s}
.hd.scrolled .nav a{color:var(--ink);opacity:.72}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:1px;
  background:var(--accent);transition:right .35s cubic-bezier(.2,.7,.3,1)}
.nav a:hover{opacity:1}
.nav a:hover::after{right:0}
.btn-mail{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.12em;
  border:1px solid rgba(255,255,255,.5);color:#fff;padding:9px 18px;border-radius:999px;
  transition:.3s;white-space:nowrap;
}
.btn-mail:hover{background:#fff;color:var(--ink);border-color:#fff}
.hd.scrolled .btn-mail{border-color:var(--ink);color:var(--ink)}
.hd.scrolled .btn-mail:hover{background:var(--ink);color:#fff}

.burger{display:none;width:44px;height:36px;border:0;background:transparent;padding:0;cursor:pointer;position:relative}
.burger span{position:absolute;left:9px;right:9px;height:1.5px;background:#fff;transition:.35s}
.hd.scrolled .burger span{background:var(--ink)}
.burger span:nth-child(1){top:12px}
.burger span:nth-child(2){top:18px}
.burger span:nth-child(3){top:24px}
body.menu-open .burger span{background:var(--ink)}
body.menu-open .hd .mk-l{display:none}
body.menu-open .hd .mk-d{display:block}
body.menu-open .burger span:nth-child(1){transform:translateY(6px) rotate(45deg)}
body.menu-open .burger span:nth-child(2){opacity:0}
body.menu-open .burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.drawer{
  position:fixed;inset:0;z-index:55;background:var(--washi);
  display:flex;flex-direction:column;justify-content:center;gap:6px;
  padding:0 var(--pad);opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:.4s cubic-bezier(.2,.7,.3,1);
}
body.menu-open .drawer{opacity:1;visibility:visible;transform:none}
.drawer a{font-family:var(--mincho);font-size:clamp(20px,5.5vw,26px);color:var(--ink);
  padding:14px 0;border-bottom:1px solid var(--line);letter-spacing:.08em}
.drawer a small{display:block;font-family:var(--gothic);font-size:11px;letter-spacing:.22em;
  color:var(--accent-deep);margin-top:2px}

/* ============ hero ============ */
.hero{position:relative;min-height:560px;height:clamp(560px,92vh,860px);overflow:hidden;background:#151412}
.mosaic{position:absolute;inset:0;display:grid;gap:3px;filter:saturate(.82) contrast(1.02)}
.cell{position:relative;overflow:hidden;background:#222}
.cell i{position:absolute;inset:0;background-size:cover;background-position:center;
  transition:opacity 1.4s ease}
.cell i.out{opacity:0}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(96deg, rgba(10,9,8,.90) 0%, rgba(10,9,8,.78) 34%, rgba(10,9,8,.44) 62%, rgba(10,9,8,.34) 100%),
    linear-gradient(180deg, rgba(10,9,8,.58) 0%, rgba(10,9,8,.10) 24%, rgba(10,9,8,.18) 66%, rgba(10,9,8,.72) 100%);
}
.hero-in{position:relative;z-index:3;height:100%;display:flex;flex-direction:column;
  justify-content:center;max-width:var(--wrap);margin-inline:auto;padding:110px var(--pad) 96px}
.eyebrow{font-size:12px;letter-spacing:.28em;color:rgba(255,255,255,.72);margin:0 0 22px;line-height:2.2}
.eyebrow b{font-weight:400;color:var(--accent)}
.hero h1{
  font-family:var(--mincho);color:#fff;margin:0;
  font-size:clamp(34px,7.4vw,74px);line-height:1.34;letter-spacing:.06em;font-weight:400;
  text-shadow:0 2px 30px rgba(0,0,0,.35);
}
.brushline{display:block;width:min(420px,72%);margin:18px 0 26px;opacity:.95}
.hero p.lead{color:rgba(255,255,255,.88);max-width:34em;margin:0 0 38px;
  font-size:clamp(13.5px,1.5vw,16px);line-height:2.15;letter-spacing:.05em}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:999px;
  font-size:13px;letter-spacing:.14em;transition:.3s}
.btn-solid{background:var(--accent);color:#fff}
.btn-solid:hover{background:var(--accent-deep);transform:translateY(-2px)}
.btn-ghost{border:1px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.scrollcue{position:absolute;right:max(24px,calc((100vw - var(--wrap))/2 + 8px));bottom:26px;z-index:4;
  writing-mode:vertical-rl;font-size:11px;letter-spacing:.3em;color:rgba(255,255,255,.65);
  display:flex;align-items:center;gap:12px}
.scrollcue::after{content:"";width:1px;height:52px;background:linear-gradient(rgba(255,255,255,.7),rgba(255,255,255,0));
  animation:cue 2.6s ease-in-out infinite}
@keyframes cue{0%{transform:scaleY(.25);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}
50.1%{transform-origin:bottom}100%{transform:scaleY(.25);transform-origin:bottom}}

/* ============ sections ============ */
section{padding:clamp(72px,10vw,132px) 0}
.sec-washi{background:var(--washi)}
.sec-ink{background:var(--ink);color:rgba(255,255,255,.78)}
.shead{margin:0 0 clamp(36px,5vw,60px)}
.shead .en{display:block;font-size:11px;letter-spacing:.34em;color:var(--accent-deep);margin-bottom:14px}
.shead h2{font-family:var(--mincho);font-weight:400;color:var(--ink);margin:0;
  font-size:clamp(24px,3.6vw,38px);line-height:1.6;letter-spacing:.08em}
.sec-ink .shead h2{color:#fff}
.shead .rule{width:44px;height:2px;background:var(--accent);margin-top:22px;border-radius:2px}

/* concept */
.concept{display:grid;grid-template-columns:1.02fr 1fr;gap:clamp(32px,6vw,84px);align-items:start}
.concept .big{font-family:var(--mincho);font-size:clamp(21px,2.9vw,32px);line-height:2.0;
  color:var(--ink);letter-spacing:.07em;margin:0}
.concept p{margin:0 0 1.4em;font-size:15px;line-height:2.3}
.evo-note{margin-top:38px;padding-top:26px;border-top:1px solid var(--line);display:flex;gap:18px;align-items:center}
.evo-note img{height:40px;width:auto;opacity:.9}
.evo-note span{font-size:12.5px;letter-spacing:.08em;color:var(--mist);line-height:1.9}

/* services */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(16px,2.2vw,28px)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:3px;padding:clamp(26px,3vw,38px);
  transition:.4s cubic-bezier(.2,.7,.3,1);position:relative;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .5s cubic-bezier(.2,.7,.3,1)}
.card:hover{transform:translateY(-4px);box-shadow:0 18px 40px -24px rgba(26,25,23,.32)}
.card:hover::before{transform:scaleX(1)}
.card .no{font-family:var(--mincho);font-size:13px;letter-spacing:.2em;color:var(--accent-deep);display:block;margin-bottom:16px}
.card h3{font-family:var(--mincho);font-weight:400;font-size:20px;color:var(--ink);margin:0 0 16px;letter-spacing:.1em}
.card ul{margin:0;padding:0;list-style:none}
.card li{position:relative;padding-left:16px;font-size:13.5px;line-height:2.05;color:var(--sumi)}
.card li::before{content:"";position:absolute;left:0;top:.95em;width:5px;height:1px;background:var(--accent)}

/* works */
.works{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(18px,3vw,40px)}
.work{display:block;group:none}
.work .ph{position:relative;overflow:hidden;border-radius:2px;background:#eee;aspect-ratio:3/2}
.work .ph img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s cubic-bezier(.2,.7,.3,1)}
.work:hover .ph img{transform:scale(1.05)}
.work .tag{position:absolute;left:0;top:0;background:rgba(26,25,23,.78);color:#fff;
  font-size:12px;letter-spacing:.16em;padding:7px 14px}
.work h3{font-family:var(--mincho);font-weight:400;color:var(--ink);font-size:clamp(15px,1.8vw,19px);
  margin:20px 0 8px;line-height:1.75;letter-spacing:.06em}
.work .meta{font-size:12px;color:var(--mist);letter-spacing:.08em;line-height:1.9;margin:0}
.more{margin-top:clamp(38px,5vw,58px);text-align:center}
.link-arrow{display:inline-flex;align-items:center;gap:12px;font-size:13px;letter-spacing:.14em;
  color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:10px;transition:.3s}
.link-arrow:hover{color:var(--accent-deep);border-color:var(--accent)}
.link-arrow::after{content:"→";transition:transform .35s}
.link-arrow:hover::after{transform:translateX(6px)}

/* flow */
.flow{position:relative;max-width:860px;padding-left:clamp(30px,5vw,56px)}
.flow::before{content:"";position:absolute;left:clamp(7px,1.2vw,13px);top:10px;bottom:10px;width:1px;
  background:linear-gradient(var(--accent),rgba(227,145,58,.18))}
.step{position:relative;padding:0 0 clamp(30px,4vw,46px)}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:calc(clamp(30px,5vw,56px) * -1 + clamp(3px,.9vw,9px));top:11px;
  width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--washi)}
.step .no{font-size:11px;letter-spacing:.24em;color:var(--accent-deep);display:block;margin-bottom:4px}
.step h3{font-family:var(--mincho);font-weight:400;font-size:clamp(17px,2.2vw,21px);color:var(--ink);
  margin:0 0 8px;letter-spacing:.1em}
.step p{margin:0;font-size:13.5px;line-height:2.1;color:var(--sumi)}

/* company */
.dl{border-top:1px solid var(--line)}
.dl .row{display:grid;grid-template-columns:200px 1fr;gap:24px;padding:22px 4px;border-bottom:1px solid var(--line)}
.dl dt{font-family:var(--mincho);color:var(--ink);font-size:14.5px;letter-spacing:.1em;margin:0}
.dl dd{margin:0;font-size:14px;line-height:2.1}
.dl dd small{color:var(--mist);font-size:12.5px}

/* cta */
.cta{text-align:center}
.cta h2{font-family:var(--mincho);font-weight:400;color:#fff;font-size:clamp(23px,3.6vw,38px);
  line-height:1.7;letter-spacing:.1em;margin:0 0 14px}
.cta p{margin:0 0 40px;font-size:13.5px;color:rgba(255,255,255,.6);letter-spacing:.08em}
.cta .btn-solid{font-size:14px;padding:17px 40px}
.foot{border-top:1px solid rgba(255,255,255,.12);margin-top:clamp(60px,8vw,96px);padding-top:38px;
  display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.foot img{height:26px;width:auto;opacity:.9}
.foot small{font-size:11.5px;letter-spacing:.1em;color:rgba(255,255,255,.42)}

/* reveal */
.rv{opacity:0;transform:translateY(24px);transition:opacity .9s cubic-bezier(.2,.7,.3,1),transform .9s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}

/* ============ responsive ============ */
@media (max-width:900px){
  .concept{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .works{grid-template-columns:1fr}
  .dl .row{grid-template-columns:1fr;gap:6px;padding:18px 2px}
}
@media (max-width:780px){
  .nav{display:none}
  .burger{display:block}
  body{font-size:15px}
  .hero{height:auto;min-height:0}
  .hero-in{padding:132px var(--pad) 96px;min-height:88vh}
  .brand img.mark{height:24px}
  .brand img.evo{height:20px}
  .hd{padding:14px 0}
  .scrollcue{display:none}
  .hero p.lead{margin-bottom:30px}
  .btn{padding:14px 24px;font-size:12.5px}
  .hero::after{background:
    linear-gradient(180deg, rgba(10,9,8,.80) 0%, rgba(10,9,8,.60) 30%, rgba(10,9,8,.58) 70%, rgba(10,9,8,.82) 100%),
    linear-gradient(90deg, rgba(10,9,8,.42) 0%, rgba(10,9,8,.20) 100%)}
  .eyebrow{letter-spacing:.14em;font-size:12px;margin-bottom:18px}
  .brushline{width:min(300px,86%)}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto}
  .rv{opacity:1;transform:none}
}
/* ============================================================
   下層ページ共通（業務実績一覧など）
   ============================================================ */
.page-head{
  position:relative;background:var(--ink);color:#fff;
  padding:clamp(130px,16vw,190px) 0 clamp(52px,7vw,76px);overflow:hidden;
}
.page-head::before{
  content:"";position:absolute;inset:0;opacity:.20;
  background:url("img/collage/t07.jpg") center/cover no-repeat;
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(10,9,8,.94) 0%,rgba(10,9,8,.80) 55%,rgba(10,9,8,.62) 100%);
}
.page-head .wrap{position:relative;z-index:2}
.page-head .en{display:block;font-size:11px;letter-spacing:.34em;color:var(--accent);margin-bottom:14px}
.page-head h1{font-family:var(--mincho);font-weight:400;margin:0;
  font-size:clamp(26px,4.2vw,42px);letter-spacing:.1em;line-height:1.5}
.page-head p{margin:16px 0 0;font-size:14px;color:rgba(255,255,255,.7);letter-spacing:.06em}
.crumbs{margin:0 0 2px;font-size:12px;letter-spacing:.1em;color:rgba(255,255,255,.6)}
.crumbs a{display:inline-block;padding:5px 3px}
.crumbs a:hover{color:var(--accent)}
.crumbs span{margin:0 8px;opacity:.5}

/* 実績一覧 ── 写真は元素材が200px前後なので、拡大せず原寸で見せる横並び */
.wlist{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(16px,2vw,26px)}
.witem{
  display:flex;background:var(--paper);border:1px solid var(--line);border-radius:3px;
  overflow:hidden;transition:box-shadow .4s cubic-bezier(.2,.7,.3,1),transform .4s cubic-bezier(.2,.7,.3,1);
}
.witem:hover{transform:translateY(-3px);box-shadow:0 16px 34px -22px rgba(26,25,23,.34)}
.witem .ph{position:relative;flex:0 0 200px;width:200px;min-height:134px;background:#efece6;overflow:hidden}
.witem .ph img{width:100%;height:100%;object-fit:cover;display:block}
.witem .bd{padding:16px 20px 16px 18px;display:flex;flex-direction:column;flex:1;min-width:0}
.witem h2{font-family:var(--mincho);font-weight:400;color:var(--ink);
  font-size:14.5px;line-height:1.75;letter-spacing:.03em;margin:0 0 8px}
.witem .desc{font-size:12.5px;line-height:1.95;color:var(--sumi);margin:0 0 12px;flex:1}
.witem .term{font-size:12px;letter-spacing:.04em;color:var(--mist);margin:0;
  padding-top:10px;border-top:1px solid var(--line)}
.witem .term b{font-weight:400;color:var(--accent-deep);margin:0 6px}
.wcount{margin:0 0 clamp(24px,3.2vw,36px);font-size:12.5px;letter-spacing:.1em;color:var(--mist)}
.wcount b{font-family:var(--mincho);font-weight:400;color:var(--ink);font-size:19px;margin:0 5px}

/* 下層ページのヘッダーは最初から白背景 */
.hd.solid{background:rgba(250,248,244,.92);backdrop-filter:saturate(1.6) blur(14px);
  -webkit-backdrop-filter:saturate(1.6) blur(14px);box-shadow:0 1px 0 var(--line)}

.page-head + section{padding-top:clamp(48px,6vw,84px)}
.backhome{text-align:center;margin-top:clamp(48px,6vw,72px)}

@media (max-width:980px){
  .wlist{grid-template-columns:1fr}
}
@media (max-width:560px){
  .witem .ph{flex:0 0 130px;width:130px;min-height:112px}
  .witem .term span{display:block}
  .witem .term b{display:none}
  .witem .bd{padding:14px 15px}
  .witem h2{font-size:14px;line-height:1.75}
  .witem .desc{font-size:12px;margin-bottom:10px}
  .witem .term{font-size:12px;padding-top:9px}
}

/* 転送ページ */
.redir{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:22px;padding:40px 24px;text-align:center;background:var(--washi)}
.redir img{width:min(300px,80%);height:auto}
.redir p{margin:0;font-size:13.5px;color:var(--sumi);line-height:2}

/* 言語切替リンク */
.lang-sw{letter-spacing:.1em !important}
.lang-sw::before{content:"";display:inline-block;width:1px;height:11px;background:currentColor;
  opacity:.3;margin-right:clamp(14px,2.2vw,30px);vertical-align:-1px}

/* ============================================================
   英語ページ
   ============================================================ */
.lang-en{
  --mincho:"Palatino Linotype",Palatino,"Book Antiqua",Georgia,"Times New Roman",serif;
  --gothic:"Helvetica Neue",Helvetica,Arial,"Segoe UI",system-ui,sans-serif;
}
.lang-en body,.lang-en{letter-spacing:.01em}
.lang-en p,.lang-en li,.lang-en dd{line-height:1.85}
.lang-en .hero h1{font-size:clamp(38px,6.6vw,72px);line-height:1.16;letter-spacing:.005em}
.lang-en .shead h2{letter-spacing:.02em;line-height:1.3}
.lang-en .concept .big{font-size:clamp(23px,3.1vw,34px);line-height:1.45;letter-spacing:.005em}
.lang-en .card h3,.lang-en .step h3,.lang-en .work h3,.lang-en .cta h2{letter-spacing:.015em}
.lang-en .cta h2{line-height:1.3}
.lang-en .eyebrow{letter-spacing:.16em}
.lang-en .dl .row{grid-template-columns:210px 1fr}
.lang-en .dl dt{letter-spacing:.02em}
.lang-en .nav a,.lang-en .btn,.lang-en .btn-mail{letter-spacing:.08em}
.lang-en .drawer a{letter-spacing:.01em}
.lang-en .work .meta,.lang-en .card li,.lang-en .step p{line-height:1.8}
.lang-en .jpname{display:block;font-family:var(--gothic);font-size:12px;color:var(--mist);
  margin-top:6px;letter-spacing:.02em}

/* 英語は1行が長くなるので、画面の高さが足りないときはヒーローを伸ばす
   （日本語ページの高さは変えない）                                  */
.lang-en .hero h1{font-size:clamp(34px,5.4vw,64px)}
@media (min-width:781px){
  .lang-en .hero{height:auto;min-height:clamp(560px,92vh,860px)}
  .lang-en .hero-in{height:auto;min-height:clamp(560px,92vh,860px)}
}

/* 英語の実績一覧 */
.wnote{margin:-14px 0 clamp(28px,3.6vw,42px);font-size:12.5px;line-height:1.85;color:var(--mist);max-width:62em}
.wnote em{font-style:italic;color:var(--sumi)}
.witem .wtag{display:inline-block;align-self:flex-start;font-size:11px;letter-spacing:.1em;color:var(--accent-deep);
  border:1px solid rgba(227,145,58,.45);border-radius:2px;padding:2px 8px;margin-bottom:9px}
.lang-en .witem h2{font-size:15px;line-height:1.5}
.lang-en .witem .jpname{margin:0 0 9px;font-size:12px}
.lang-en .witem .desc{font-size:12.5px;line-height:1.7}
.lang-en .witem .term{font-size:12px}
.lang-en .witem .ph{min-height:180px}
@media (max-width:560px){
  .lang-en .witem .ph{min-height:130px}
  .wnote{font-size:12px}
}