:root{
  --concrete:#2F3330;
  --chalk:#E8EBE6;
  --chlorophyll:#6FBF4B;
  --soil-iron:#4A3F35;
  --white:#FFFFFF;
  --ink:#2F3330;
  --muted:#5C635C;
  --line:rgba(47,51,48,.18);
  --line-strong:rgba(47,51,48,.35);
  --font-display:"Archivo Black","Zen Old Mincho",serif;
  --font-jp:"Zen Old Mincho","Noto Sans JP",serif;
  --font-body:"IBM Plex Sans JP","Noto Sans JP","IBM Plex Sans",sans-serif;
  --ease:cubic-bezier(.2,.8,.2,1);
  --max:1120px;
  --gutter:clamp(1.25rem,4vw,3rem);
  --nav-h:64px;
  --concrete-grid:
    linear-gradient(rgba(47,51,48,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(47,51,48,.045) 1px,transparent 1px);
  --concrete-size:28px 28px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scrollbar-width:none;-ms-overflow-style:none}
html::-webkit-scrollbar{display:none;width:0;height:0}
html,body{margin:0;padding:0}
body.ch{
  margin:0;padding:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--chalk);
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.ch::-webkit-scrollbar{display:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3{margin:0 0 .4em;line-height:1.2;font-weight:700}
p{margin:0 0 1em}
address{font-style:normal}

.ch-display{
  font-family:var(--font-jp);
  font-weight:700;
  font-size:clamp(1.65rem,3.4vw,2.55rem);
  letter-spacing:.02em;
}
.ch-brand-type{
  font-family:var(--font-display);
  font-weight:400;
  letter-spacing:.02em;
  text-transform:lowercase;
}

.ch-skip{
  position:absolute;top:0;left:-9999px;z-index:200;
  background:var(--concrete);color:var(--white);padding:.7rem 1rem;
}
.ch-skip:focus{left:0}

/* NAV — sharp concrete bar */
.ch-nav{
  position:fixed;inset:0 0 auto;z-index:100;
  display:flex;align-items:center;gap:1rem;
  min-height:var(--nav-h);
  padding:.75rem var(--gutter);
  background:rgba(232,235,230,.92);
  border-bottom:1px solid var(--line);
  transition:background .25s,border-color .25s,box-shadow .25s;
}
.ch-nav::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--chlorophyll);transform:scaleX(0);transform-origin:left;
  transition:transform .45s var(--ease);
}
.ch-nav.is-solid::after,.ch-nav.is-open::after{transform:scaleX(1)}
.ch-nav.is-solid,.ch-nav.is-open{
  background:rgba(232,235,230,.98);
  border-bottom-color:transparent;
}
.ch-nav__logo{
  font-family:var(--font-display);
  font-size:1.55rem;line-height:1;color:var(--concrete);flex-shrink:0;
}
.ch-nav__links{margin-left:auto;display:flex;align-items:center;gap:1.35rem}
.ch-nav__links a{font-weight:600;font-size:.9rem;color:var(--muted);letter-spacing:.04em}
.ch-nav__links a.is-on,.ch-nav__links a:hover{color:var(--concrete)}
.ch-nav__links a.is-on{box-shadow:inset 0 -2px 0 var(--chlorophyll)}
.ch-nav__cta{flex-shrink:0}

.ch-btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.85rem 1.4rem;
  border:0;border-radius:0;
  font-family:var(--font-body);font-weight:700;font-size:.92rem;
  letter-spacing:.06em;cursor:pointer;
  background:var(--chlorophyll);color:var(--concrete);
  transition:background .2s,color .2s,transform .2s var(--ease);
  -webkit-tap-highlight-color:transparent;
}
.ch-btn:hover{background:#5eae3f;transform:translateY(-2px)}
.ch-btn:active{transform:scale(.98)}
.ch-btn--ghost{
  background:transparent;color:var(--white);
  border:1.5px solid var(--white);
}
.ch-btn--ghost:hover{background:var(--white);color:var(--concrete)}
.ch-btn--dark{background:var(--concrete);color:var(--chalk)}
.ch-btn--dark:hover{background:#1f2321;color:var(--white)}

.ch-burger{
  display:none;margin-left:auto;width:44px;height:44px;padding:0;
  background:var(--concrete);border:0;color:var(--chalk);cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;gap:6px;flex-shrink:0;
}
.ch-burger i{display:block;width:18px;height:2px;background:currentColor;transition:transform .3s var(--ease),opacity .3s}
.ch-burger[aria-expanded="true"] i:nth-child(1){transform:translateY(8px) rotate(45deg)}
.ch-burger[aria-expanded="true"] i:nth-child(2){opacity:0}
.ch-burger[aria-expanded="true"] i:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

body.is-nav-open{overflow:hidden;touch-action:none}
.ch-drawer-backdrop{
  display:none;position:fixed;inset:0;z-index:90;
  background:rgba(47,51,48,.55);opacity:0;transition:opacity .3s var(--ease);
}
.ch-drawer-backdrop.is-open{display:block;opacity:1}
.ch-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,88vw);z-index:95;
  background:var(--concrete);color:var(--chalk);
  padding:max(5.5rem,calc(env(safe-area-inset-top) + 4.5rem)) 1.25rem max(1.5rem,env(safe-area-inset-bottom));
  display:flex;flex-direction:column;gap:1rem;
  transform:translateX(105%);transition:transform .4s var(--ease);
  overflow-y:auto;-webkit-overflow-scrolling:touch;
}
.ch-drawer.is-open{transform:translateX(0)}
.ch-drawer__head{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-bottom:.75rem;border-bottom:1px solid rgba(232,235,230,.2)}
.ch-drawer__head strong{font-family:var(--font-display);font-size:1.4rem}
.ch-drawer__close{width:40px;height:40px;border:0;background:rgba(232,235,230,.1);color:var(--chalk);font-size:1.5rem;cursor:pointer}
.ch-drawer__nav{display:grid;gap:.1rem}
.ch-drawer__nav a{min-height:48px;display:flex;align-items:center;font-weight:700;font-size:1.1rem;padding:.35rem .5rem}
.ch-drawer__nav a.is-on{color:var(--chlorophyll)}
.ch-drawer__cta{margin-top:.5rem;justify-content:center!important;background:var(--chlorophyll)!important;color:var(--concrete)!important;min-height:48px}

#ch-main{margin:0;padding:0}

/* HERO — full bleed */
.ch-hero{
  position:relative;margin:0;padding:0;
  min-height:100vh;min-height:100dvh;
  display:grid;align-items:end;color:var(--white);overflow:hidden;
}
.ch-hero--page{min-height:56vh;min-height:56dvh}
.ch-hero__media,.ch-hero__media img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;object-position:center;
}
.ch-hero__veil{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(47,51,48,.18) 0%,rgba(47,51,48,.78) 100%),
    linear-gradient(90deg,rgba(47,51,48,.62) 0%,rgba(47,51,48,.18) 52%,transparent 100%);
}
.ch-hero__copy{
  position:relative;z-index:2;
  padding:0 var(--gutter) clamp(3rem,8vh,5rem);
  max-width:820px;
}
.ch-hero__brand{
  font-family:var(--font-display);
  font-size:clamp(3.6rem,12vw,7.4rem);
  line-height:.88;margin:0 0 .55rem;letter-spacing:.01em;
}
.ch-hero--page .ch-hero__brand{font-size:clamp(2.4rem,7vw,4rem);margin-bottom:.2rem}
.ch-hero h1{
  font-family:var(--font-jp);
  font-size:clamp(1.35rem,2.8vw,2rem);
  font-weight:700;max-width:16ch;margin:0 0 .65rem;
}
.ch-hero__lead{max-width:36ch;opacity:.92;font-size:1.02rem}
.ch-hero__actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.4rem}

/* Layout blocks */
.ch-wrap{width:min(var(--max),calc(100% - 2 * var(--gutter)));margin-inline:auto}
.ch-sec{padding:clamp(3.5rem,7vw,5.5rem) 0;position:relative}
.ch-sec--chalk{background:var(--chalk)}
.ch-sec--white{background:var(--white)}
.ch-sec--concrete{
  background:
    var(--concrete-grid),
    linear-gradient(180deg,#2F3330,#242826);
  background-size:var(--concrete-size),auto;
  color:var(--chalk);
}
.ch-sec--concrete .ch-k{color:var(--chlorophyll)}
.ch-sec--concrete p,.ch-sec--concrete .ch-muted{color:rgba(232,235,230,.78)}
.ch-sec--concrete .ch-steps p,.ch-sec--concrete .ch-row p{color:rgba(232,235,230,.72)}
.ch-sec--concrete .ch-steps li,.ch-sec--concrete .ch-rows,.ch-sec--concrete .ch-row{
  border-color:rgba(232,235,230,.16);
}
.ch-sec--soil{background:var(--soil-iron);color:var(--chalk)}
.ch-sec--soil .ch-k{color:var(--chlorophyll)}
.ch-sec--soil p{color:rgba(232,235,230,.8)}
.ch-sec--soil .ch-block{background:rgba(232,235,230,.06);color:var(--chalk)}
.ch-sec--soil .ch-block p{color:rgba(232,235,230,.78)}
.ch-sec--soil .ch-blocks{background:rgba(232,235,230,.12)}

.ch-k{
  display:inline-block;
  font-family:var(--font-display);
  font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--chlorophyll);margin-bottom:.55rem;
}
.ch-center{text-align:center;max-width:620px;margin:0 auto 2.4rem}
.ch-center p,.ch-muted{color:var(--muted)}

/* Line-draw section divider */
.ch-divider{
  display:block;width:100%;height:2px;margin:0;border:0;
  background:transparent;position:relative;overflow:hidden;
}
.ch-divider::after{
  content:"";position:absolute;inset:0 auto 0 0;width:100%;height:100%;
  background:linear-gradient(90deg,var(--concrete) 0%,var(--chlorophyll) 45%,var(--concrete) 100%);
  transform:scaleX(0);transform-origin:left center;
  transition:transform 1.15s var(--ease);
}
.ch-divider.is-drawn::after{transform:scaleX(1)}

/* Split: concrete block + organic mask */
.ch-split{
  display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(1.5rem,4vw,3rem);align-items:center;
}
.ch-split--flip>*:first-child{order:2}
.ch-split__text{padding:clamp(1rem,2vw,1.5rem) 0}
.ch-mask{
  position:relative;overflow:hidden;
  clip-path:ellipse(38% 44% at 50% 50%);
  aspect-ratio:1;background:var(--concrete);
  transition:clip-path 1.25s var(--ease);
}
.ch-mask.is-open{clip-path:ellipse(82% 76% at 50% 50%)}
.ch-mask img{width:100%;height:100%;object-fit:cover}
.ch-mask::after{
  content:"";position:absolute;inset:0;
  border:1px solid rgba(111,191,75,.35);pointer-events:none;
  clip-path:inherit;
}

/* Season strip — typographic calendar, horizontal drift */
.ch-season{
  overflow:hidden;border-block:1px solid var(--line);
  background:var(--white);
}
.ch-season__track{
  display:flex;gap:0;width:max-content;
  animation:ch-drift 42s linear infinite;
}
.ch-season__item{
  display:grid;grid-template-columns:auto 1fr;gap:.85rem;align-items:baseline;
  padding:1.35rem 2.5rem;min-width:280px;
  border-right:1px solid var(--line);
  white-space:nowrap;
}
.ch-season__code{
  font-family:var(--font-display);
  font-size:clamp(1.6rem,3vw,2.2rem);line-height:1;color:var(--concrete);
}
.ch-season__jp{font-family:var(--font-jp);font-weight:700;font-size:1.1rem;margin-right:.45rem}
.ch-season__work{display:inline;font-size:.85rem;color:var(--muted);letter-spacing:.08em}
@keyframes ch-drift{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}

/* Service rows — rectilinear, no bento */
.ch-rows{display:grid;gap:0;border-top:1px solid var(--line)}
.ch-row{
  display:grid;grid-template-columns:88px 1.4fr auto;
  gap:1.25rem;align-items:center;
  padding:1.5rem 0;border-bottom:1px solid var(--line);
}
.ch-row__num{
  font-family:var(--font-display);font-size:1.5rem;color:var(--chlorophyll);
}
.ch-row h3{margin:0 0 .25rem;font-family:var(--font-jp);font-size:1.2rem}
.ch-row p{margin:0;color:var(--muted);font-size:.95rem}
.ch-row__meta{
  font-family:var(--font-display);font-size:.72rem;letter-spacing:.12em;
  color:var(--soil-iron);text-align:right;white-space:nowrap;
}

/* Stacked service features */
.ch-feature{
  display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(1.5rem,4vw,3rem);align-items:center;
  padding:clamp(2rem,4vw,3rem) 0;border-bottom:1px solid var(--line);
}
.ch-feature:last-child{border-bottom:0}
.ch-feature--rev>*:first-child{order:2}
.ch-feature__media{overflow:hidden;aspect-ratio:5/4;background:var(--concrete)}
.ch-feature__media img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s var(--ease)}
.ch-feature:hover .ch-feature__media img{transform:scale(1.03)}
.ch-feature__body .meta{font-family:var(--font-display);font-size:.75rem;letter-spacing:.14em;color:var(--chlorophyll)}

/* Process / grow list */
.ch-steps{display:grid;gap:0}
.ch-steps li{
  display:grid;grid-template-columns:88px 1fr;gap:1rem;
  padding:1.15rem 0;border-bottom:1px solid var(--line);
}
.ch-steps b{
  font-family:var(--font-display);font-size:1.35rem;color:var(--chlorophyll);line-height:1.2;
}
.ch-steps h3{margin:0 0 .2rem;font-family:var(--font-jp);font-size:1.1rem}
.ch-steps p{margin:0;color:var(--muted)}

/* Gallery — sharp rects */
.ch-gallery{
  display:grid;grid-template-columns:repeat(3,1fr);gap:.65rem;
}
.ch-gallery figure{
  margin:0;position:relative;overflow:hidden;aspect-ratio:4/5;background:var(--concrete);
}
.ch-gallery img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.ch-gallery figure:hover img{transform:scale(1.04)}
.ch-gallery figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:.65rem .8rem;font-size:.78rem;letter-spacing:.12em;
  background:linear-gradient(transparent,rgba(47,51,48,.75));color:var(--chalk);
}

/* Pricing / area / guarantee — hard blocks, not soft cards */
.ch-blocks{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}
.ch-blocks--4{grid-template-columns:repeat(4,1fr)}
.ch-block{
  background:var(--white);padding:0 0 1.6rem;overflow:hidden;
}
.ch-sec--concrete .ch-block{background:rgba(232,235,230,.06);color:var(--chalk)}
.ch-sec--concrete .ch-block p{color:rgba(232,235,230,.75)}
.ch-sec--concrete .ch-blocks{background:rgba(232,235,230,.14)}
.ch-sec--soil .ch-block{background:rgba(232,235,230,.08);color:var(--chalk)}
.ch-sec--soil .ch-block p{color:rgba(232,235,230,.8)}
.ch-sec--soil .ch-blocks{background:rgba(232,235,230,.18)}
.ch-block h3,.ch-block .ch-price,.ch-block > p{
  padding-left:1.35rem;padding-right:1.35rem;
}
.ch-block h3{font-family:var(--font-jp);font-size:1.15rem;margin:.9rem 0 .4rem}
.ch-block:not(:has(img)){padding:1.6rem 1.35rem}
.ch-block:not(:has(img)) h3,.ch-block:not(:has(img)) .ch-price,.ch-block:not(:has(img)) > p{padding-left:0;padding-right:0}
.ch-block:not(:has(img)) h3{margin:0 0 .4rem}
.ch-price{
  font-family:var(--font-display);font-size:1.55rem;color:var(--chlorophyll);margin:.35rem 0;
}
.ch-block img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block}

/* Team */
.ch-team{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}
.ch-team article{background:var(--white)}
.ch-team img{width:100%;aspect-ratio:4/5;object-fit:cover}
.ch-team .body{padding:1.15rem 1.2rem 1.4rem}
.ch-team .meta{font-family:var(--font-display);font-size:.68rem;letter-spacing:.14em;color:var(--chlorophyll);margin:.2rem 0 .5rem}

/* Quotes */
.ch-quote{
  margin:0 0 1.25rem;padding:1.4rem 1.5rem;
  border-left:3px solid var(--chlorophyll);
  background:var(--white);
}
.ch-sec--concrete .ch-quote{background:rgba(232,235,230,.06)}
.ch-quote p{margin:0 0 .7rem;font-family:var(--font-jp);font-size:1.05rem}
.ch-quote cite{font-style:normal;font-size:.85rem;color:var(--muted);letter-spacing:.04em}

/* Blog list */
.ch-posts{display:grid;gap:0;border-top:1px solid var(--line)}
.ch-post{
  display:grid;grid-template-columns:220px 1fr;gap:1.5rem;align-items:center;
  padding:1.5rem 0;border-bottom:1px solid var(--line);
}
.ch-post img{width:100%;aspect-ratio:4/3;object-fit:cover}
.ch-post .tag{
  font-family:var(--font-display);font-size:.68rem;letter-spacing:.16em;
  color:var(--chlorophyll);display:inline-block;margin-bottom:.35rem;
}
.ch-post h3{font-family:var(--font-jp);font-size:1.25rem;margin:0 0 .35rem}
.ch-post p{margin:0;color:var(--muted)}
.ch-post .date{font-size:.82rem;color:var(--muted);letter-spacing:.08em}

/* FAQ */
.ch-faq{display:grid;gap:0;border-top:1px solid var(--line);max-width:760px;margin:0 auto}
.ch-faq--flush{max-width:none;margin:1.25rem 0 0}
.ch-faq details{border-bottom:1px solid var(--line);padding:.2rem 0}
.ch-faq summary{
  cursor:pointer;list-style:none;font-weight:700;font-family:var(--font-jp);
  padding:1.1rem 0;display:flex;justify-content:space-between;gap:1rem;
}
.ch-faq summary::-webkit-details-marker{display:none}
.ch-faq summary::after{content:"+";font-family:var(--font-display);color:var(--chlorophyll)}
.ch-faq details[open] summary::after{content:"–"}
.ch-faq details p{margin:0 0 1.1rem;color:var(--muted)}

/* Form */
.ch-form{
  display:grid;gap:1rem;max-width:560px;margin:0 auto;
  padding:2rem;background:var(--white);border:1px solid var(--line);
}
.ch-form label{display:grid;gap:.4rem;font-weight:600;font-size:.92rem}
.ch-form input,.ch-form textarea{
  width:100%;padding:.9rem 1rem;border:1px solid var(--line-strong);
  border-radius:0;background:var(--chalk);font:inherit;color:var(--ink);
}
.ch-form input:focus,.ch-form textarea:focus{
  outline:2px solid var(--chlorophyll);outline-offset:0;border-color:var(--chlorophyll);
}
.ch-form textarea{min-height:140px;resize:vertical}
.ch-form .err{color:#a33;font-size:.85rem;font-weight:500}
.ch-form button{justify-self:start;margin-top:.35rem}

.ch-map{aspect-ratio:16/11;overflow:hidden;border:1px solid var(--line);background:var(--concrete)}
.ch-map iframe{width:100%;height:100%;border:0;display:block;filter:grayscale(.4) contrast(1.06)}

/* CTA band */
.ch-cta{
  position:relative;min-height:360px;display:grid;place-items:center;
  color:var(--white);overflow:hidden;text-align:center;
}
.ch-cta__bg,.ch-cta__bg img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.ch-cta__veil{position:absolute;inset:0;background:rgba(47,51,48,.74)}
.ch-cta__in{position:relative;z-index:2;padding:3rem var(--gutter);max-width:640px}
.ch-cta__in p{color:rgba(232,235,230,.85)}

/* Footer */
.ch-foot{
  background:var(--concrete);color:var(--chalk);
  padding:3.5rem var(--gutter) 2rem;
  background-image:
    var(--concrete-grid),
    linear-gradient(180deg,#2F3330,#262A27);
  background-size:var(--concrete-size),auto;
}
.ch-foot__grid{
  width:min(var(--max),100%);margin:0 auto 2rem;
  display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:2rem;
}
.ch-foot__brand{font-family:var(--font-display);font-size:1.8rem;display:block;margin-bottom:.6rem}
.ch-foot h3{
  font-family:var(--font-display);font-size:.72rem;letter-spacing:.18em;
  color:var(--chlorophyll);margin:0 0 1rem;text-transform:uppercase;
}
.ch-foot p,.ch-foot li{font-size:.92rem;color:rgba(232,235,230,.78)}
.ch-foot a:hover{color:var(--chlorophyll)}
.ch-foot ul{display:grid;gap:.45rem}
.ch-foot__copy{
  text-align:center;opacity:.55;font-size:.82rem;margin:0;
  padding-top:1.5rem;border-top:1px solid rgba(232,235,230,.12);
}

/* Reveal */
.js [data-rise]{
  opacity:0;transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  transition-delay:calc(var(--d,0) * 70ms);
}
.js [data-rise].in{opacity:1;transform:none}

/* Responsive */
@media (max-width:960px){
  .ch-nav__links,.ch-nav__cta{display:none}
  .ch-burger{display:flex}
  .ch-split,.ch-feature,.ch-feature--rev,.ch-split--flip{grid-template-columns:1fr}
  .ch-split--flip>*:first-child,.ch-feature--rev>*:first-child{order:0}
  .ch-row{grid-template-columns:64px 1fr;gap:.75rem}
  .ch-row__meta{grid-column:2;text-align:left}
  .ch-gallery{grid-template-columns:repeat(2,1fr)}
  .ch-blocks,.ch-blocks--4,.ch-team{grid-template-columns:1fr 1fr}
  .ch-post{grid-template-columns:140px 1fr;gap:1rem}
  .ch-foot__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .ch-blocks,.ch-blocks--4,.ch-team,.ch-gallery{grid-template-columns:1fr}
  .ch-post{grid-template-columns:1fr}
  .ch-foot__grid{grid-template-columns:1fr}
  .ch-hero__actions{flex-direction:column;align-items:stretch}
  .ch-btn{width:100%}
  .ch-season__item{min-width:240px;padding:1.1rem 1.5rem}
  .ch-hero__brand{font-size:clamp(3.2rem,16vw,5rem)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .ch-season__track{animation:none!important}
  .ch-divider::after{transform:none!important}
  .ch-mask{clip-path:ellipse(70% 65% at 50% 50%)!important;transition:none!important}
  .js [data-rise]{opacity:1!important;transform:none!important;transition:none!important}
  .ch-btn,.ch-feature__media img,.ch-gallery img,.ch-nav::after{transition:none!important}
}