:root{--ink: #101820;--blue: #304971;--accent: #243ec9;--cyan: #9ee8ef;--paper: #f7f7f4}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Noto Sans JP,Yu Gothic,sans-serif;font-size:14px;line-height:1.8}img{display:block;max-width:100%;height:auto}a{color:inherit}.skip-link{position:fixed;left:1rem;top:-4rem;z-index:99;background:#fff;padding:.7rem}.skip-link:focus{top:1rem}.site-header{position:sticky;top:0;z-index:20;min-height:76px;padding:0 2.4vw;display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid #ddd}.brand{text-decoration:none;font-weight:800;font-size:1.25rem}.nav-menu>label,.nav-toggle{display:none}.nav-menu>nav{display:flex}.site-header nav{display:flex;gap:2.5rem;font-size:.82rem}.site-header nav a{text-decoration:none}.site-header nav a:focus-visible,.site-header nav a:hover{color:var(--accent)}.nav-group{position:relative}.sub-menu{position:absolute;top:100%;left:50%;display:grid;min-width:13rem;padding:.75rem;visibility:hidden;opacity:0;transform:translate(-50%,.5rem);background:#fff;border:1px solid #ddd;box-shadow:0 .75rem 1.5rem #0002;transition:opacity .15s ease,transform .15s ease,visibility .15s ease}.sub-menu a{padding:.35rem .5rem;white-space:nowrap}.nav-group:hover .sub-menu,.nav-group:focus-within .sub-menu{visibility:visible;opacity:1;transform:translate(-50%)}.hero{position:relative;isolation:isolate;min-height:calc(100svh - 76px);display:grid;place-items:center;padding:6vw;overflow:hidden;background:#304971;color:#fff;text-align:center}.hero:before,.hero:after{position:absolute;inset:0;z-index:-1;content:"";background-position:center;background-size:cover}.hero:before{background-image:linear-gradient(#07111a66,#07111a66),url(/images/hero-tower-inspection.jpg)}.hero:after{background-image:linear-gradient(#07111a66,#07111a66),url(/images/tower-line-inspection.jpg);animation:hero-crossfade 12s ease-in-out infinite}.rotating-word{position:relative;display:inline-block;min-width:2.2em}.rotating-word>span:last-child{position:absolute;inset:0;animation:word-crossfade 8s step-end infinite}.rotating-word>span:first-child{animation:word-crossfade 8s step-end infinite reverse}@keyframes hero-crossfade{0%,42%{opacity:0}50%,92%{opacity:1}to{opacity:0}}@keyframes word-crossfade{0%,49%{visibility:hidden}50%,to{visibility:visible}}@media(prefers-reduced-motion:reduce){.hero:after,.rotating-word>span{animation:none}.hero:after,.rotating-word>span:last-child{display:none}}.hero h1{margin:.4rem 0;font-size:clamp(2.8rem,5.2vw,5.2rem);line-height:1.2;letter-spacing:.04em}.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.2em}.section{padding:7rem max(6vw,1.5rem)}.section h2,.page-hero h1{font-size:clamp(2.4rem,5vw,4.8rem);line-height:1.1;margin:.4rem 0 2rem}.split{display:grid;grid-template-columns:1fr 1fr;gap:7vw;align-items:center}.split p{max-width:42rem}.services article{display:grid;grid-template-columns:1fr 1fr;max-width:1150px;margin:3rem auto;background:#fff}.services article:nth-of-type(2n) div{order:2}.services article>div{padding:clamp(2rem,5vw,4rem);align-self:center}.services article span{font-size:3rem;color:var(--accent);font-weight:800}.services h3{font-size:clamp(1.5rem,3vw,2.5rem)}.services img{width:100%;height:100%;object-fit:cover}.projects{text-align:center}.culture{display:grid;grid-template-columns:1fr 1.15fr;background:var(--blue);color:#fff}.culture>div{padding:7vw;align-self:center}.culture h2{font-size:clamp(2.5rem,5vw,5rem);line-height:1.1}.culture img{width:100%;height:100%;object-fit:cover}.cards{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;max-width:1000px;margin:3rem auto}.cards a{display:flex;flex-direction:column;gap:1rem;min-height:220px;padding:3rem;background:#e3e5ec;text-decoration:none;border-top:6px solid var(--accent)}.cards a:nth-child(2){background:#d9f2f4;border-color:#42aeb9}.cards strong{font-size:2.3rem}.contact{padding:4rem max(6vw,1.5rem);display:flex;align-items:center;justify-content:space-between;gap:2rem;background:var(--cyan)}.contact h2{margin:0;font-size:clamp(1.5rem,3vw,2.5rem)}.button{display:inline-block;padding:1rem 1.5rem;background:var(--ink);color:#fff;text-decoration:none;font-weight:700}.company dl,.job-page dl{max-width:920px;margin:3rem auto 0;border-top:2px solid}.company dl div,.job-page dl div{display:grid;grid-template-columns:220px 1fr;padding:1.2rem .7rem;border-bottom:1px solid #bbb}.company dd,.job-page dd{margin:0}.page-hero{padding:7rem max(6vw,1.5rem);background:var(--blue);color:#fff}.page-hero .lead{max-width:760px;font-size:1.15rem}.content-shell{max-width:1050px;margin:0 auto;padding:5rem 1.5rem}.content-shell section{margin-bottom:4rem}.content-shell h2{font-size:2rem}.prose{max-width:850px}.center{text-align:center;margin:3rem}.site-footer{padding:3rem 6vw;display:flex;flex-wrap:wrap;gap:2rem;justify-content:space-between;background:var(--ink);color:#fff;font-size:.85rem}.site-footer a{color:#fff}@media(max-width:1140px){.site-header{min-height:75px;padding:0 30px}.nav-menu>label{display:grid;width:36px;height:36px;cursor:pointer;list-style:none;place-items:center}.menu-icon,.menu-icon:before,.menu-icon:after{display:block;width:25px;height:3px;background:var(--ink);content:"";transition:transform .2s ease}.menu-icon:before{transform:translateY(-8px)}.menu-icon:after{transform:translateY(5px)}.nav-toggle:checked+label .menu-icon{background:transparent}.nav-toggle:checked+label .menu-icon:before{transform:translateY(0) rotate(45deg)}.nav-toggle:checked+label .menu-icon:after{transform:translateY(-3px) rotate(-45deg)}.nav-menu>nav{display:none}.nav-toggle:checked~nav{display:flex;position:absolute;top:75px;right:0;left:0;flex-direction:column;gap:0;padding:1rem 30px;background:#fff;border-top:1px solid #eee;box-shadow:0 .75rem 1.5rem #0002}.site-header nav>a,.site-header nav>.nav-group>a{display:block;padding:.65rem 0}.sub-menu{left:0;transform:translateY(.5rem)}.nav-group:hover .sub-menu,.nav-group:focus-within .sub-menu{transform:translate(0)}}@media(max-width:820px){.hero h1{font-size:clamp(2.25rem,9vw,3rem)}.section{padding:5rem 1.5rem}.split,.services article,.culture,.cards{grid-template-columns:1fr}.services article:nth-of-type(2n) div{order:0}.services article img{max-height:420px}.culture img{max-height:480px}.contact{align-items:flex-start;flex-direction:column}.company dl div,.job-page dl div{grid-template-columns:1fr;gap:.4rem}.site-footer{flex-direction:column}}.cards small{font-size:.95rem;line-height:1.9}.cards b{margin-top:auto}.recruit-message{max-width:760px;margin:0 auto 2rem;text-align:center}.services ul{padding-left:1.2rem}.services li+li{margin-top:.35rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
