:root{--ink:#171815;--paper:#f7f6f2;--white:#fff;--line:#d8d7d1;--muted:#696a64;--sage:#777d68}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Helvetica Neue",sans-serif}a{color:inherit;text-decoration:none}.site-header{height:104px;padding:0 4.5vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--paper) 94%,transparent);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.wordmark{display:flex;flex-direction:column;font-size:15px;font-weight:700;letter-spacing:.14em;line-height:1.05}nav{display:flex;gap:clamp(22px,3.5vw,56px);font-size:11px;letter-spacing:.18em}nav a,.text-link,.contact-link{transition:opacity .2s}nav a:hover,.text-link:hover,.contact-link:hover{opacity:.55}.hero{min-height:calc(100vh - 104px);padding:clamp(80px,10vw,150px) 4.5vw 6vw;display:flex;flex-direction:column;justify-content:space-between}.eyebrow{margin:0;font-size:10px;font-weight:700;letter-spacing:.24em}.hero h1{margin:10vh 0;max-width:1100px;font-family:"Times New Roman","Yu Mincho",serif;font-size:clamp(44px,7.5vw,116px);font-weight:400;letter-spacing:-.04em;line-height:1.1}.hero-footer{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;border-top:1px solid var(--line);padding-top:24px}.hero-footer p{margin:0;color:var(--muted);font-size:clamp(13px,1.1vw,16px);line-height:1.9}.text-link{display:inline-flex;gap:32px;align-items:center;font-size:10px;font-weight:700;letter-spacing:.18em}.text-link span{font-size:16px}.method-section,.work-section{padding:clamp(88px,11vw,170px) 4.5vw}.method-section{background:var(--white)}.section-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:48px}.section-note{margin:0;color:var(--muted);font-family:"Times New Roman","Yu Mincho",serif;font-size:17px}.mandala{width:min(100%,1180px);margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}.mandala-cell{aspect-ratio:1/1;min-width:0;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);padding:clamp(18px,2.2vw,34px);display:flex;flex-direction:column;justify-content:space-between;position:relative;transition:background .3s,color .3s}.mandala-cell:not(.center-cell):hover{background:var(--sage);color:var(--white)}.cell-number{font-family:"Times New Roman",serif;font-size:13px}.mandala-cell h3{margin:0 0 12px;font-size:clamp(14px,1.45vw,21px);letter-spacing:.03em;font-weight:500}.mandala-cell p{margin:0;max-width:230px;color:var(--muted);font-size:clamp(11px,.95vw,14px);line-height:1.75}.mandala-cell:not(.center-cell):hover p{color:#f3f1e8}.mandala-cell>span:last-child{position:absolute;right:clamp(18px,2.2vw,34px);top:clamp(18px,2.2vw,34px);font-size:16px;opacity:.55}.center-cell{background:var(--ink);color:var(--white);justify-content:center;align-items:center;text-align:center}.center-cell p{color:var(--white);font-family:"Times New Roman",serif;font-size:clamp(29px,4vw,58px);letter-spacing:-.04em;line-height:.9}.center-cell>span{margin:8px 0;font-size:9px;letter-spacing:.3em}.center-cell small{position:absolute;bottom:10%;font-size:11px;letter-spacing:.13em}.work-heading h2{margin:18px 0 0;font-family:"Times New Roman",serif;font-size:clamp(52px,8vw,120px);font-weight:400;letter-spacing:-.045em;line-height:.9}.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,3vw,52px)}.case-image-wrap{position:relative;aspect-ratio:4/5;overflow:hidden;background:#deddd6}.case-image{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(.88);transition:transform .8s,filter .4s}.case-card:hover .case-image{transform:scale(1.035);filter:grayscale(.25) contrast(.94)}.case-number{position:absolute;top:20px;left:20px;width:40px;height:40px;display:grid;place-items:center;background:var(--paper);border-radius:50%;font-family:"Times New Roman",serif;font-size:12px}.case-category{margin:24px 0 12px;font-size:9px;font-weight:700;letter-spacing:.19em}.case-card h3{margin:0;font-family:"Times New Roman","Yu Mincho",serif;font-size:clamp(24px,2.2vw,36px);font-weight:400;line-height:1.35}.case-copy{min-height:60px;margin:16px 0 26px;color:var(--muted);font-size:13px;line-height:1.85}.contact-section{min-height:76vh;padding:10vw 4.5vw;background:var(--ink);color:var(--white);display:flex;flex-direction:column;justify-content:center}.contact-section h2{margin:8vh 0;font-family:"Times New Roman","Yu Mincho",serif;font-size:clamp(48px,8vw,118px);font-weight:400;letter-spacing:-.04em;line-height:1.08}.contact-link{width:fit-content;display:flex;gap:48px;padding-bottom:9px;border-bottom:1px solid #85867f;font-size:12px;letter-spacing:.2em}footer{min-height:110px;padding:36px 4.5vw;background:var(--ink);color:#999a94;border-top:1px solid #343530;display:grid;grid-template-columns:1fr 1fr auto;align-items:end;gap:24px;font-size:9px;letter-spacing:.17em}
@media(max-width:720px){.site-header{height:82px;padding:0 20px}nav a:not(:last-child){display:none}.hero{min-height:calc(100svh - 82px);padding:64px 20px 28px}.hero h1{margin:12vh 0;font-size:clamp(42px,13vw,68px)}.hero-footer{align-items:start;flex-direction:column;gap:28px}.method-section,.work-section{padding:88px 20px}.section-heading{align-items:start;flex-direction:column;gap:18px;margin-bottom:32px}.mandala-cell{padding:12px}.mandala-cell h3{margin:0;font-size:clamp(10px,3.15vw,15px);overflow-wrap:anywhere}.mandala-cell p{display:none}.cell-number{font-size:10px}.mandala-cell>span:last-child{display:none}.center-cell p{display:block;font-size:clamp(17px,6vw,30px)}.center-cell>span{display:block;margin:5px 0;font-size:6px}.center-cell small{bottom:8%;font-size:7px;letter-spacing:.04em}.work-heading h2{font-size:18vw}.cases{grid-template-columns:1fr;gap:72px}.case-image-wrap{aspect-ratio:4/4.6}.case-copy{min-height:auto}.contact-section{min-height:70svh;padding:100px 20px}footer{padding:30px 20px;grid-template-columns:1fr auto}footer p:nth-child(2){display:none}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition-duration:.01ms!important}}
.mandala-cell{cursor:pointer}
.process-page{background:var(--white)}.process-detail{min-height:calc(100vh - 104px);padding:clamp(48px,7vw,100px) 4.5vw;display:grid;grid-template-columns:minmax(100px,22vw) 1fr;grid-template-rows:auto 1fr auto;gap:40px 7vw}.back-link{grid-column:1/-1;width:fit-content;font-size:10px;font-weight:700;letter-spacing:.18em}.process-number{font-family:"Times New Roman",serif;font-size:clamp(100px,20vw,310px);line-height:.8;color:#e7e6e0;letter-spacing:-.07em}.process-copy{align-self:center;max-width:760px}.process-copy h1{margin:25px 0 30px;font-family:"Times New Roman",serif;font-size:clamp(60px,9vw,140px);font-weight:400;line-height:.85;letter-spacing:-.05em}.process-lead{margin:0 0 42px;font-family:"Times New Roman","Yu Mincho",serif;font-size:clamp(23px,3vw,42px);line-height:1.45}.process-body{padding-top:28px;border-top:1px solid var(--line);color:var(--muted);font-size:15px;line-height:2}.process-pager{grid-column:1/-1;padding-top:30px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:24px}.process-pager a{font-size:10px;font-weight:700;letter-spacing:.13em}
@media(max-width:720px){.process-detail{min-height:calc(100svh - 82px);padding:42px 20px;grid-template-columns:1fr;grid-template-rows:auto auto auto auto;gap:36px}.back-link{grid-column:auto}.process-number{font-size:38vw}.process-copy h1{font-size:18vw}.process-pager{grid-column:auto}.process-pager a{max-width:44%;line-height:1.5}.process-pager a:last-child{text-align:right}}
/* 試作版：工程の視認性と2件の事例表示 */
.cell-number{font-size:clamp(30px,4vw,58px);line-height:1}.cell-ja{display:block;margin:0 0 10px;font-size:clamp(13px,1.1vw,17px);font-weight:500}.center-cell h2{margin:0 0 20px;font-family:"Times New Roman","Yu Mincho",serif;font-size:clamp(23px,2.9vw,43px);font-weight:400;line-height:1.1}.center-cell p{max-width:none;font-family:Arial,"Helvetica Neue",sans-serif;font-size:clamp(12px,1.25vw,18px);letter-spacing:0;line-height:1.6}.center-cell small{position:static;margin-top:20px;font-size:clamp(8px,.8vw,11px);letter-spacing:.08em}.cases{grid-template-columns:repeat(2,minmax(0,1fr));max-width:1000px;margin:0 auto}.has-image{background-image:linear-gradient(rgba(0,0,0,.42),rgba(0,0,0,.42)),var(--cell-image);background-size:cover;background-position:center;color:#fff}.has-image p{color:#fff}
@media(max-width:720px){.cell-number{font-size:clamp(21px,7vw,34px)}.cell-ja{margin:6px 0 0;font-size:clamp(9px,2.7vw,12px)}.center-cell h2{margin:0 0 6px;font-size:clamp(13px,4vw,21px)}.center-cell p{display:block;font-size:clamp(7px,2vw,10px);line-height:1.4}.center-cell small{margin-top:6px;font-size:6px;letter-spacing:0}.cases{grid-template-columns:1fr}}