:root{
  --paper:#F5F2EC;
  --paper-2:#EEEAE1;
  --paper-line:#E2DCCF;
  --ink:#1A1815;
  --sub:#6B6557;
  --muted:#9A9286;
  --accent:#2B3340;       /* sumi-indigo */
  --accent-soft:#3A4452;
  --rule:#D9D2C3;
  --serif:"Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans:"Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --mono:"JetBrains Mono", ui-monospace, monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
html,body{margin:0;padding:0;overflow-x:hidden}
body{position:relative}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  font-feature-settings:"palt";
}
::selection{background:var(--accent);color:var(--paper)}

/* layout */
.wrap{max-width:1180px;margin:0 auto;padding:0 40px}
.narrow{max-width:880px;margin:0 auto;padding:0 40px}
@media (max-width:720px){
  .wrap, .narrow{padding:0 24px}
}

/* type */
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;letter-spacing:.02em;color:var(--ink);margin:0;line-height:1.4}
p{margin:0}
.ja-mincho{font-family:var(--serif)}
.mono{font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase;font-size:11px;color:var(--sub);font-weight:500}
.num{font-family:var(--mono);font-weight:500;letter-spacing:.04em}
.lede{font-family:var(--serif);font-size:20px;line-height:2;color:var(--ink);font-weight:400}
.body{font-size:16px;line-height:2.1;color:var(--ink);font-weight:400}
.sub{color:var(--sub)}

/* header */
.mdx-header{
  position:fixed;top:0;left:0;
  width:100%;z-index:200;
  padding:0 48px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
  transition:background .3s, border-color .3s;
  border-bottom:1px solid transparent;
}
.mdx-header.scrolled{
  background:rgba(245,242,236,.94);
  backdrop-filter:blur(10px);
  border-bottom-color:var(--rule);
}
.mdx-logo{
  font-size:15px;font-weight:700;
  letter-spacing:0.18em;
  color:var(--ink);
  text-decoration:none;
  transition:color .3s;
}
.mdx-nav-links{display:flex;gap:32px;align-items:center;margin-left:auto;margin-right:32px}
.mdx-nav-links a{color:var(--ink);text-decoration:none;font-size:13px;letter-spacing:.04em;transition:color .2s}
.mdx-nav-links a:hover{color:var(--accent)}
@media (max-width:900px){.mdx-nav-links{display:none}}

.mdx-header-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 28px;
  border-radius:100px;
  border:1px solid rgba(26,24,21,0.35);
  color:var(--ink);
  font-size:12px;letter-spacing:0.14em;
  text-decoration:none;
  transition:background .25s, border-color .25s, color .25s;
}
.mdx-header-cta:hover{
  background:var(--ink);
  color:var(--paper);
  border-color:var(--ink);
}
@media (max-width:720px){
  .mdx-header{padding:0 24px}
}

/* hero */
.hero{padding:144px 0 32px;position:relative}
.hero-meta{display:flex;gap:24px;align-items:baseline;margin-bottom:60px}
.hero-meta .rule{flex:0 0 64px;height:1px;background:var(--ink);transform:translateY(-4px)}
.hero h1{
  font-size:clamp(34px, 5.6vw, 68px);
  line-height:1.45;
  letter-spacing:.04em;
  font-weight:500;
  margin-bottom:48px;
}
.hero h1 .accent{color:var(--accent)}
.hero-sub{
  font-family:var(--serif);
  font-size:17px;
  line-height:2.1;
  color:var(--ink);
  margin-bottom:0;
}
.hero-sub + .hero-sub{margin-top:12px;margin-bottom:64px}
.hero-tags{display:flex;flex-wrap:wrap;gap:24px 40px;margin-top:48px}
.hero-tag{
  display:flex;align-items:center;gap:12px;
  padding:6px 0 6px 14px;
  border-left:2px solid var(--ink);
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--sub);
}
.hero-tag .idx{color:var(--accent);font-weight:600}
@media (max-width:720px){
  .hero{padding:48px 0 72px}
  .hero h1{margin-bottom:32px}
  .hero-sub{margin-bottom:40px}
  .hero-tags{gap:16px 24px}
}

/* hero image */
.hero-image{margin-top:56px}
.placeholder{
  position:relative;
  width:100%;
  background:
    repeating-linear-gradient(135deg, #EAE3D2 0 8px, #E2DBC8 8px 16px);
  border:1px solid var(--rule);
  overflow:hidden;
}
.placeholder::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg, transparent 60%, rgba(245,242,236,.4));
  pointer-events:none;
}
.ph-caption{
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;
  color:var(--muted);
  margin-top:12px;
  text-align:right;
}
.ph-caption .arrow{color:var(--accent);margin-right:8px}
.ratio-21{aspect-ratio:21/9}
.ratio-43{aspect-ratio:4/3}
.ratio-11{aspect-ratio:1/1}
.ratio-32{aspect-ratio:3/2}
.ratio-54{aspect-ratio:5/4}

/* section base */
section{padding:80px 0;position:relative;scroll-margin-top:64px}
@media (max-width:720px){section{padding:64px 0}}

.sec-head{display:flex;gap:32px;align-items:center;margin-bottom:72px}
.sec-head .label{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--accent);font-weight:500;flex:0 0 auto}
.sec-head h2{font-size:clamp(26px, 3.4vw, 40px);line-height:1.55;flex:1;font-weight:500}
.sec-rule{height:1px;background:var(--rule);margin:0 0 72px}
@media (max-width:720px){
  .sec-head{flex-direction:column;gap:16px;margin-bottom:48px}
  .sec-head .label{padding-top:0}
}

/* SECTION 01 — concerns */
.concerns{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.concern{
  background:var(--paper);
  padding:48px 40px;
  display:flex;flex-direction:column;gap:20px;
  min-height:280px;
  border-radius:4px;
}
.concern .n{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--accent);font-weight:500}
.concern h3{font-size:24px;line-height:1.6;font-weight:500;letter-spacing:.02em}
.concern p{font-size:15px;line-height:1.9;color:var(--ink)}
@media (max-width:720px){
  .concerns{grid-template-columns:1fr}
  .concern{padding:36px 24px;min-height:0}
}

/* SECTION 02 — steps */
.lede-block{margin:0 0 96px}
.steps{display:grid;grid-template-columns:repeat(3, 1fr);gap:48px;position:relative}
.step{display:flex;flex-direction:column;gap:24px}
.step-img{margin-bottom:8px}
.step-num{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--accent);font-weight:500;display:flex;align-items:center;gap:12px}
.step-num::after{content:"";flex:1;height:1px;background:var(--rule)}
.step h3{font-size:21px;line-height:1.65;font-weight:500}
.step p{font-size:15px;line-height:2;color:var(--sub)}
@media (max-width:900px){
  .steps{grid-template-columns:1fr;gap:64px}
}

/* SECTION 03 — 4 DX columns */
.dx-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--ink)}
.dx{padding:48px 28px 56px 0;border-bottom:1px solid var(--rule);position:relative}
.dx + .dx{padding-left:28px}
.dx .kanji{
  font-family:var(--serif);
  font-size:46px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--ink);
  line-height:1.1;
  margin-bottom:8px;
}
.dx .kanji .small{font-size:14px;font-family:var(--mono);color:var(--accent);letter-spacing:.18em;vertical-align:top;margin-left:10px;font-weight:500}
.dx .en{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--accent);text-transform:uppercase;margin-bottom:32px}
.dx p{font-size:15px;line-height:2.05;color:var(--sub)}
.dx p + p{margin-top:14px}
@media (max-width:900px){
  .dx-grid{grid-template-columns:1fr 1fr}
  .dx, .dx + .dx{padding:36px 20px 40px 20px;border-right:1px solid var(--rule)}
  .dx:nth-child(2n){border-right:none}
}
@media (max-width:520px){
  .dx-grid{grid-template-columns:1fr}
  .dx, .dx + .dx{padding:32px 0 36px;border-right:none}
}

/* SECTION 04 — case study */
.case{display:grid;grid-template-columns:1.05fr 1fr;gap:80px;align-items:start}
.case-meta{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--accent);margin-bottom:24px;text-transform:uppercase}
.case h2{font-size:clamp(24px, 2.8vw, 34px);line-height:1.55;margin-bottom:48px;font-weight:500}
.case-body{font-size:16px;line-height:2.15;color:var(--ink)}
.case-body + .case-body{margin-top:28px}
.case-list{margin:32px 0;padding:24px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.case-list span{font-family:var(--serif);font-size:19px;color:var(--ink);text-align:center;letter-spacing:.08em}
.case-pr-link{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:32px;
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--accent);text-decoration:none;
  border-bottom:1px solid currentColor;
  padding-bottom:2px;
  transition:opacity .2s;
}
.case-pr-link:hover{opacity:.6}
.case-figures{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.case-figures .placeholder:first-child{grid-column:1 / -1}
@media (max-width:900px){
  .case{grid-template-columns:1fr;gap:48px}
}
@media (max-width:720px){
  .case-list{display:none}
}

/* SECTION 05 — comparison */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--rule);border-radius:8px;overflow:hidden}
.compare > div{padding:48px 40px}
.compare-old{border-right:1px solid var(--rule);background:var(--paper)}
.compare-new{background:var(--paper-2)}
.compare h3{font-size:20px;font-weight:500;margin-bottom:8px;letter-spacing:.04em}
.compare .tag{font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--sub);margin-bottom:32px;display:block}
.compare-new .tag{color:var(--accent)}
.compare ul{list-style:none;margin:0;padding:0}
.compare li{
  padding:18px 0;
  border-bottom:1px solid var(--rule);
  font-size:16px;
  display:flex;align-items:center;gap:16px;
  color:var(--ink);
}
.compare li:last-child{border-bottom:none}
.compare-old li .mark{color:var(--muted);font-family:var(--mono);font-size:11px;letter-spacing:.1em}
.compare-new li .mark{color:var(--accent);font-family:var(--mono);font-size:11px;letter-spacing:.1em}
@media (max-width:720px){
  .compare{grid-template-columns:1fr}
  .compare > div{padding:36px 24px}
  .compare-old{border-right:none;border-bottom:1px solid var(--rule)}
}

/* SECTION 06 — consult */
.consult{display:grid;grid-template-columns:1fr 1.4fr;gap:64px;align-items:start}
.consult h2{font-size:clamp(24px,2.8vw,34px);line-height:1.55;font-weight:500}
.consult-body p{font-size:16px;line-height:2.15;margin-bottom:24px}
.consult-quote{
  font-family:var(--serif);
  font-size:24px;line-height:1.8;
  padding:32px 0 32px 32px;
  border-left:1px solid var(--accent);
  margin:32px 0;
  color:var(--ink);
}
@media (max-width:900px){
  .consult{grid-template-columns:1fr;gap:32px}
}

/* FAQ */
.faq{border-top:1px solid var(--ink)}
.faq details{
  border-bottom:1px solid var(--rule);
  padding:0;
}
.faq summary{
  list-style:none;
  cursor:pointer;
  padding:32px 0;
  display:grid;
  grid-template-columns:48px 1fr 32px;
  gap:24px;
  align-items:baseline;
  font-family:var(--serif);
  font-size:20px;
  line-height:1.7;
  color:var(--ink);
  transition:color .2s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary .q{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.18em;font-weight:500}
.faq summary .plus{
  font-family:var(--mono);font-size:18px;color:var(--sub);text-align:right;
  transition:transform .3s;font-weight:300;
}
.faq details[open] summary .plus{transform:rotate(45deg);color:var(--accent)}
.faq summary:hover{color:var(--accent)}
.faq .answer{
  padding:0 64px 36px 72px;
  display:grid;
  grid-template-columns:24px 1fr;
  gap:24px;
  align-items:start;
}
.faq .answer .a{font-family:var(--mono);font-size:11px;color:var(--sub);letter-spacing:.18em;font-weight:500;padding-top:4px}
.faq .answer p{font-size:16px;line-height:2.1;color:var(--sub)}
.faq .answer p + p{margin-top:14px}
@media (max-width:720px){
  .faq summary{grid-template-columns:36px 1fr 24px;font-size:16px;padding:24px 0;gap:16px}
  .faq .answer{padding:0 0 28px 52px;gap:16px}
}

/* CTA */
.cta{background:var(--paper);color:var(--ink);padding:140px 0 96px}
.cta .wrap{max-width:1400px}
.cta-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:start}
.cta h2{color:var(--ink);font-size:clamp(24px,3.2vw,40px);line-height:1.5;font-weight:400;margin-bottom:32px;letter-spacing:.04em}
.cta-sub{font-family:var(--serif);font-size:16px;line-height:2;color:var(--ink);margin-bottom:24px}
.cta-quote{font-family:var(--serif);font-size:16px;color:var(--sub);margin-bottom:0}
.cta-form-wrap{background:var(--paper-2);border:1px solid var(--rule);padding:40px;border-radius:12px}
.cta-form{display:flex;flex-direction:column;gap:16px}
.cta-form-group{display:flex;flex-direction:column}
.cta-form-input{
  width:100%;
  background:var(--paper);
  border:1px solid var(--rule);
  border-radius:6px;
  padding:14px 16px;
  font-size:15px;
  font-family:var(--sans);
  color:var(--ink);
  outline:none;
  transition:border-color .2s;
  resize:none;
}
.cta-form-input:focus{border-color:var(--ink)}
.cta-form-input::placeholder{color:var(--muted)}
.cta-form-privacy{flex-direction:row;align-items:center}
.cta-privacy-label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--sub);cursor:pointer}
.cta-privacy-label a{color:var(--ink)}
.cta-form-submit{
  background:var(--ink);
  color:var(--paper);
  border:none;
  border-radius:6px;
  padding:16px;
  font-size:15px;
  font-family:var(--serif);
  font-weight:500;
  letter-spacing:.1em;
  cursor:pointer;
  transition:background .2s;
  margin-top:4px;
}
.cta-form-submit:hover{background:var(--accent)}
.cta-form-submit:disabled{opacity:.6;cursor:default}
.cta-form-note{margin-top:12px;font-family:var(--mono);font-size:11px;color:var(--muted);text-align:center;letter-spacing:.1em}
.cta-meta{
  padding-top:32px;
  border-top:1px solid var(--rule);
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--muted);
  text-transform:uppercase;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
@media (max-width:900px){
  .cta-inner{grid-template-columns:1fr;gap:48px}
}
@media (max-width:720px){
  .cta{padding:88px 0}
  .cta-form-wrap{padding:28px 24px}
  .back-top{bottom:72px}
}

/* /lp bridge */
.lp-bridge{background:var(--paper-2);padding:96px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.lp-bridge-inner{display:flex;gap:64px;align-items:center}
.lp-bridge h3{font-family:var(--serif);font-size:clamp(24px,3vw,38px);line-height:1.6;font-weight:500}
.lp-bridge-btn{
  display:inline-flex;align-items:center;gap:20px;
  padding:24px 48px;
  border:1px solid var(--ink);
  border-radius:8px;
  color:var(--ink);text-decoration:none;
  font-family:var(--serif);font-size:18px;letter-spacing:.08em;
  white-space:nowrap;
  transition:background .25s, color .25s;
}
.lp-bridge-btn:hover{background:var(--ink);color:var(--paper)}
.lp-bridge-btn .arr{font-family:var(--mono)}
@media (max-width:720px){
  .lp-bridge-inner{flex-direction:column;align-items:flex-start;gap:24px}
  .lp-bridge{padding:64px 0}
}

/* footer */
.foot-min{
  padding:24px 0;
  border-top:1px solid var(--rule);
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;
}
.foot-min-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* back to top */
.back-top{
  position:fixed;left:50%;bottom:32px;transform:translateX(-50%);z-index:100;
  width:44px;height:44px;
  border-radius:50%;
  border:1px solid var(--ink);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;
  transition:opacity .3s, background .2s, color .2s;
}
.back-top.visible{opacity:1;pointer-events:auto}
.back-top:hover{background:var(--ink);color:var(--paper)}

/* subtle fade-in on scroll */
.fade{opacity:0;transform:translateY(12px);transition:opacity .9s ease, transform .9s ease}
.fade.in{opacity:1;transform:none}

/* confirmation overlay */
.mdx-confirm-overlay{
  display:none;position:fixed;inset:0;z-index:500;
  background:rgba(26,24,21,0.6);
  backdrop-filter:blur(4px);
  align-items:center;justify-content:center;
  padding:24px;
}
.mdx-confirm-overlay.active{display:flex}
.mdx-confirm-modal{
  background:var(--paper);
  border:1px solid var(--rule);
  border-radius:12px;
  padding:48px;
  max-width:520px;width:100%;
}
.mdx-confirm-label{
  font-family:var(--mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--accent);margin-bottom:16px;
}
.mdx-confirm-heading{
  font-size:clamp(18px,2.5vw,24px);font-weight:500;
  line-height:1.5;margin-bottom:32px;
}
.mdx-confirm-table{
  border-top:1px solid var(--rule);margin-bottom:32px;
  display:grid;grid-template-columns:auto 1fr;
}
.mdx-confirm-table dt{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--sub);
  padding:16px 24px 16px 0;border-bottom:1px solid var(--rule);
  white-space:nowrap;
}
.mdx-confirm-table dd{
  font-size:15px;color:var(--ink);line-height:1.7;
  padding:16px 0;border-bottom:1px solid var(--rule);
  word-break:break-all;
}
.mdx-confirm-actions{display:flex;gap:12px;flex-wrap:wrap}
.mdx-confirm-btn-back{
  flex:0 0 auto;
  padding:14px 24px;border:1px solid var(--rule);
  border-radius:6px;background:transparent;
  font-size:14px;color:var(--sub);cursor:pointer;
  font-family:var(--sans);letter-spacing:.04em;
  transition:border-color .2s,color .2s;
}
.mdx-confirm-btn-back:hover{border-color:var(--ink);color:var(--ink)}
.mdx-confirm-btn-send{
  flex:1;
  padding:14px 24px;
  background:var(--ink);color:var(--paper);
  border:none;border-radius:6px;
  font-size:14px;font-family:var(--serif);letter-spacing:.06em;
  cursor:pointer;transition:background .2s;
}
.mdx-confirm-btn-send:hover{background:var(--accent)}
.mdx-confirm-btn-send:disabled{opacity:.6;cursor:default}
@media (max-width:520px){
  .mdx-confirm-modal{padding:32px 24px}
  .mdx-confirm-actions{flex-direction:column}
}

/* large hero number */
.hero-stamp{
  position:absolute;right:40px;top:80px;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;
  color:var(--sub);text-align:right;line-height:2;
}
.hero-stamp .accent{color:var(--accent)}
@media (max-width:900px){.hero-stamp{display:none}}