:root{
  --navy:#22405f; --navy-d:#162b42; --gold:#e9b949; --gold-d:#c9982a;
  --ink:#2a2f36; --sub:#5d6670; --line:#e3e6ea; --bg:#f6f7f9; --white:#fff;
  --serif:"Noto Serif JP","Yu Mincho","YuMincho",serif;
  --sans:"Noto Sans JP","Hiragino Sans","Yu Gothic","Meiryo",sans-serif;
  --w:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);color:var(--ink);line-height:1.9;font-size:16px;background:var(--white)}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy)}
.wrap{max-width:var(--w);margin:0 auto;padding:0 24px}

/* header */
.hd{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.hd .wrap{display:flex;align-items:center;justify-content:space-between;height:72px;max-width:1280px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo img{height:44px;width:auto}
.logo span{font-family:var(--serif);font-weight:600;font-size:17px;letter-spacing:.06em}
.gnav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0;align-items:center}
.gnav a{display:block;padding:8px 12px;text-decoration:none;color:var(--ink);font-size:14px;letter-spacing:.04em;border-radius:4px}
.gnav a:hover,.gnav a[aria-current]{color:var(--navy);background:var(--bg)}
.gnav .cta a{background:var(--navy);color:#fff;padding:9px 18px}
.gnav .cta a:hover{background:var(--navy-d);color:#fff}
.menu-btn{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer}
.menu-btn span{display:block;width:24px;height:2px;background:var(--ink);margin:5px auto;transition:.2s}
@media (max-width:1020px){
  .menu-btn{display:block}
  .gnav{position:fixed;inset:72px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);display:none;max-height:calc(100vh - 72px);overflow:auto}
  .gnav.open{display:block}
  .gnav ul{flex-direction:column;align-items:stretch;padding:8px 16px 20px}
  .gnav a{padding:14px 8px;border-bottom:1px solid var(--line);border-radius:0;font-size:15px}
  .gnav .cta a{text-align:center;margin-top:12px;border-radius:4px}
  .logo span{font-size:15px}
}

/* hero */
.hero{position:relative;min-height:min(86vh,760px);display:grid;place-items:center;text-align:center;color:#fff;background:#3b5672;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:url(images/hero.jpg) center/cover no-repeat}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,43,66,.15),rgba(22,43,66,.45))}
.hero .in{position:relative;z-index:1;padding:80px 24px}
.hero .brand{font-family:var(--serif);font-size:clamp(30px,5vw,52px);letter-spacing:.2em;margin:0 0 18px;font-weight:500}
.hero .line{width:min(320px,60vw);height:1px;background:rgba(255,255,255,.8);margin:0 auto 26px}
.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(22px,3.2vw,34px);letter-spacing:.12em;line-height:1.7;margin:0 0 22px}
.hero p{font-size:clamp(13px,1.6vw,16px);letter-spacing:.08em;margin:0;opacity:.95}
.hero .scroll{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);z-index:1;font-size:11px;letter-spacing:.3em;opacity:.85}

/* page head */
.ph{position:relative;color:#fff;text-align:center;padding:90px 24px 80px;background:#3b5672 url(images/hero.jpg) center/cover}
.ph::after{content:"";position:absolute;inset:0;background:rgba(22,43,66,.55)}
.ph > *{position:relative;z-index:1}
.ph .en{font-family:var(--serif);letter-spacing:.3em;font-size:13px;color:var(--gold);text-transform:uppercase;margin:0 0 6px}
.ph h1{font-family:var(--serif);font-weight:500;font-size:clamp(26px,4vw,38px);letter-spacing:.12em;margin:0}
.ph.energy{background-image:url(images/energy.jpg)} .ph.paint{background-image:url(images/paint.jpg)}
.ph.alliance{background-image:url(images/alliance.jpg)} .ph.maintenance{background-image:url(images/maintenance.jpg)}
.crumb{font-size:12px;color:var(--sub);padding:14px 0}
.crumb a{color:var(--sub);text-decoration:none}

/* sections */
.sec{padding:96px 0}
.sec.gray{background:var(--bg)}
.sec.navy{background:var(--navy);color:#fff}
.ttl{text-align:center;margin:0 0 52px}
.ttl .en{display:block;font-family:var(--serif);letter-spacing:.32em;font-size:13px;color:var(--gold-d);text-transform:uppercase;margin-bottom:6px}
.navy .ttl .en{color:var(--gold)}
.ttl h2{font-family:var(--serif);font-weight:500;font-size:clamp(24px,3.2vw,32px);letter-spacing:.1em;margin:0;line-height:1.5}
.ttl h2::after{content:"";display:block;width:40px;height:2px;background:var(--gold);margin:18px auto 0}
.lead{max-width:760px;margin:0 auto;text-align:center;font-size:16px;color:var(--sub)}
.navy .lead{color:#dfe7ef}
h3{font-family:var(--serif);font-weight:600;letter-spacing:.05em;line-height:1.6}
.btn{display:inline-block;padding:14px 34px;border:1px solid var(--navy);color:var(--navy);text-decoration:none;letter-spacing:.08em;font-size:15px;transition:.2s;background:#fff}
.btn:hover{background:var(--navy);color:#fff}
.btn.fill{background:var(--navy);color:#fff}
.btn.fill:hover{background:var(--navy-d)}
.btn.gold{background:var(--gold);border-color:var(--gold);color:var(--navy-d);font-weight:700}
.btn.gold:hover{background:var(--gold-d);border-color:var(--gold-d)}
.center{text-align:center}
.mt{margin-top:40px}

/* about split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split > img{width:100%;aspect-ratio:1/1;object-fit:cover}
.split .tx p{margin:0 0 1.2em}
.badges{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin-top:26px}
.badges img{height:72px;width:auto;max-width:46%;object-fit:contain}
@media (max-width:820px){.split{grid-template-columns:1fr;gap:32px}}

/* reasons */
.reasons{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.reason{background:#fff;padding:38px 30px;border-top:3px solid var(--gold);box-shadow:0 2px 14px rgba(22,43,66,.06)}
.reason .no{font-family:var(--serif);font-size:38px;color:var(--gold);line-height:1;margin-bottom:12px}
.reason h3{font-size:19px;margin:0 0 10px;color:var(--navy)}
.reason p{margin:0;font-size:15px;color:var(--sub)}
@media (max-width:820px){.reasons{grid-template-columns:1fr}}

/* business cards */
.biz{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.bcard{display:block;text-decoration:none;color:inherit;background:#fff;overflow:hidden;box-shadow:0 2px 14px rgba(22,43,66,.07);transition:.25s}
.bcard:hover{transform:translateY(-3px);box-shadow:0 8px 28px rgba(22,43,66,.12)}
.bcard .im{aspect-ratio:16/9;overflow:hidden}
.bcard .im img{width:100%;height:100%;object-fit:cover;transition:.5s}
.bcard:hover .im img{transform:scale(1.04)}
.bcard .bd{padding:26px 28px 30px}
.bcard .num{font-family:var(--serif);font-size:12px;letter-spacing:.25em;color:var(--gold-d)}
.bcard h3{font-size:21px;margin:4px 0 8px;color:var(--navy)}
.bcard p{margin:0 0 14px;color:var(--sub);font-size:15px}
.bcard .more{font-size:13px;letter-spacing:.1em;color:var(--navy);font-weight:700}
@media (max-width:820px){.biz{grid-template-columns:1fr}}

/* news */
.news-list{list-style:none;margin:0 auto;padding:0;max-width:880px;border-top:1px solid var(--line)}
.news-list li{border-bottom:1px solid var(--line)}
.news-list a,.news-list .row{display:flex;gap:20px;align-items:baseline;padding:20px 8px;text-decoration:none;color:inherit;flex-wrap:wrap}
.news-list a:hover{background:var(--bg)}
.news-list time{font-family:var(--serif);color:var(--sub);min-width:92px;font-size:15px}
.tag{display:inline-block;font-size:12px;padding:2px 10px;border:1px solid var(--navy);color:var(--navy);min-width:96px;text-align:center;line-height:1.8}
.news-list .t{flex:1;min-width:240px}
.news-item{max-width:880px;margin:0 auto 28px;padding:0 0 28px;border-bottom:1px solid var(--line);scroll-margin-top:96px}
.news-item .meta{display:flex;gap:16px;align-items:center;margin-bottom:6px}
.news-item h2{font-family:var(--serif);font-weight:600;font-size:21px;margin:0 0 10px;line-height:1.6}
.news-item p{margin:0;color:var(--sub);white-space:pre-line}

/* greeting */
.greet{max-width:820px;margin:0 auto}
.greet p{margin:0 0 1.4em}
.sign{text-align:right;font-family:var(--serif);margin-top:36px}
.sign small{display:block;color:var(--sub);font-size:14px}
.sign strong{font-size:24px;font-weight:500;letter-spacing:.2em}
.greet-short{max-width:820px;margin:0 auto;text-align:center}

/* timeline */
.tl{max-width:860px;margin:0 auto;list-style:none;padding:0;position:relative}
.tl::before{content:"";position:absolute;left:120px;top:8px;bottom:8px;width:1px;background:var(--line)}
.tl li{display:grid;grid-template-columns:120px 1fr;gap:36px;padding:14px 0;position:relative}
.tl li::before{content:"";position:absolute;left:115px;top:26px;width:11px;height:11px;border-radius:50%;background:var(--gold)}
.tl .y{font-family:var(--serif);color:var(--navy);font-weight:600;text-align:right;padding-right:8px}
.tl .d{color:var(--ink)}
@media (max-width:640px){.tl::before{left:6px}.tl li{grid-template-columns:1fr;gap:0;padding-left:30px}.tl li::before{left:1px}.tl .y{text-align:left}}

/* tables */
.tbl{width:100%;border-collapse:collapse;max-width:920px;margin:0 auto;background:#fff}
.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:20px 18px;text-align:left;vertical-align:top}
.tbl th{width:200px;font-weight:600;color:var(--navy);background:var(--bg)}
@media (max-width:640px){.tbl th,.tbl td{display:block;width:100%}.tbl th{padding:12px 14px}.tbl td{padding:14px 14px 22px}}
.branches{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px;max-width:920px;margin:0 auto}
.branch{background:#fff;border:1px solid var(--line);padding:22px}
.branch .area{font-size:12px;color:var(--gold-d);letter-spacing:.15em}
.branch h3{margin:2px 0 6px;font-size:18px;color:var(--navy)}
.branch p{margin:0;font-size:14px;color:var(--sub);line-height:1.8}
.makers{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:920px;margin:0 auto;padding:0;list-style:none}
.makers li{background:#fff;border:1px solid var(--line);padding:8px 16px;font-size:14px}

/* business detail */
.intro{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center}
.intro > img{width:100%;aspect-ratio:4/3;object-fit:cover}
.intro .catch{font-family:var(--serif);font-size:clamp(20px,2.6vw,26px);color:var(--navy);line-height:1.7;margin:0 0 20px;font-weight:600}
@media (max-width:820px){.intro{grid-template-columns:1fr;gap:28px}}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px}
.card{background:#fff;padding:26px 24px;border:1px solid var(--line)}
.card h3{margin:0 0 6px;font-size:17px;color:var(--navy)}
.card p{margin:0;font-size:14px;color:var(--sub);line-height:1.8}
.checks{list-style:none;padding:0;margin:0 auto;max-width:760px;display:grid;gap:12px}
.checks li{background:#fff;padding:16px 20px 16px 52px;position:relative;border:1px solid var(--line)}
.checks li::before{content:"";position:absolute;left:20px;top:50%;width:16px;height:9px;border-left:3px solid var(--gold-d);border-bottom:3px solid var(--gold-d);transform:translateY(-70%) rotate(-45deg)}
.flow{list-style:none;padding:0;margin:0 auto;max-width:820px;counter-reset:f}
.flow li{counter-increment:f;display:grid;grid-template-columns:64px 1fr;gap:20px;padding:20px 0;border-bottom:1px dashed var(--line);align-items:start}
.flow li::before{content:"0" counter(f);font-family:var(--serif);font-size:28px;color:var(--gold-d);line-height:1.2}
.flow h3{margin:0 0 4px;font-size:17px;color:var(--navy)}
.flow p{margin:0;font-size:14px;color:var(--sub)}
.strengths{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.strengths .s{text-align:center;padding:30px 22px;border:1px solid rgba(255,255,255,.25)}
.strengths .s .no{font-family:var(--serif);color:var(--gold);font-size:13px;letter-spacing:.3em}
.strengths h3{margin:8px 0 10px;font-size:18px}
.strengths p{margin:0;font-size:14px;color:#dfe7ef}
@media (max-width:820px){.strengths{grid-template-columns:1fr}}
.faq{max-width:820px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);margin-bottom:12px}
.faq summary{cursor:pointer;padding:18px 48px 18px 56px;position:relative;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q";position:absolute;left:20px;top:16px;font-family:var(--serif);color:var(--gold-d);font-size:20px}
.faq summary::after{content:"+";position:absolute;right:20px;top:14px;font-size:22px;color:var(--navy)}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 24px 20px 56px;position:relative;color:var(--sub)}
.faq .a::before{content:"A";position:absolute;left:20px;top:-2px;font-family:var(--serif);color:var(--navy);font-size:20px}
.partner{max-width:820px;margin:0 auto;background:#fff;border:1px solid var(--line);padding:30px}
.partner h3{margin:0 0 8px;color:var(--navy)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media (max-width:820px){.two{grid-template-columns:1fr}}
.panel{background:#fff;padding:34px 30px;border-top:3px solid var(--navy)}
.panel.g{border-top-color:var(--gold)}
.panel .who{font-size:12px;letter-spacing:.2em;color:var(--gold-d)}
.panel h3{margin:4px 0 12px;font-size:20px;color:var(--navy)}
.panel ul{margin:12px 0 0;padding-left:1.2em;color:var(--sub);font-size:15px}
.note{font-size:13px;color:var(--sub)}

/* cta band */
.cta-band{background:var(--navy) url(images/hero.jpg) center/cover;position:relative;color:#fff;text-align:center;padding:80px 24px}
.cta-band::after{content:"";position:absolute;inset:0;background:rgba(22,43,66,.82)}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{font-family:var(--serif);font-weight:500;font-size:clamp(22px,3vw,30px);letter-spacing:.1em;margin:0 0 12px}
.cta-band p{margin:0 0 28px;color:#dfe7ef}
.cta-band .tel{font-family:var(--serif);font-size:clamp(28px,4vw,40px);letter-spacing:.06em;color:#fff;text-decoration:none;display:inline-block;margin-bottom:4px}
.cta-band .hours{font-size:13px;color:#cdd8e3;margin-bottom:26px}
.cta-band .btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn.line{background:#06c755;border-color:#06c755;color:#fff;font-weight:700}
.btn.line:hover{background:#05a948}

/* form */
.form{max-width:760px;margin:0 auto;background:#fff;padding:40px;border:1px solid var(--line)}
.form .f{margin-bottom:22px}
.form label{display:block;font-weight:600;margin-bottom:6px;font-size:15px}
.form .req{display:inline-block;background:#c0392b;color:#fff;font-size:11px;padding:1px 8px;margin-left:8px;vertical-align:2px;font-weight:400}
.form input[type=text],.form input[type=email],.form input[type=tel],.form select,.form textarea{width:100%;padding:13px 14px;border:1px solid #cfd5dc;font:inherit;font-size:16px;background:#fbfcfd;border-radius:2px}
.form textarea{min-height:160px}
.form .opts{display:flex;flex-wrap:wrap;gap:8px 18px}
.form .opts label{font-weight:400;display:flex;align-items:center;gap:6px;margin:0}
.form .hp{position:absolute;left:-9999px}
.form .agree{font-size:14px;text-align:center}
.form .send{text-align:center;margin-top:26px}
.form button{font:inherit;cursor:pointer;border:0;padding:16px 60px;font-size:16px}
.form-msg{display:none;padding:14px;background:#fff6e0;border:1px solid var(--gold);margin-bottom:20px;font-size:14px}
@media (max-width:640px){.form{padding:26px 18px}}

/* footer */
.ft{background:var(--navy-d);color:#c8d3de;padding:56px 0 24px;font-size:14px}
.ft .cols{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px}
.ft .name{font-family:var(--serif);color:#fff;font-size:18px;letter-spacing:.08em;margin:0 0 10px}
.ft p{margin:0 0 6px}
.ft a{color:#c8d3de;text-decoration:none}
.ft a:hover{color:#fff}
.ft ul{list-style:none;margin:0;padding:0}
.ft li{margin-bottom:8px}
.ft .copy{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:18px;text-align:center;font-size:12px;color:#8fa1b3}
@media (max-width:820px){.ft .cols{grid-template-columns:1fr;gap:26px}}

/* mobile fixed cta */
.fixcta{display:none}
@media (max-width:640px){
  .fixcta{display:grid;grid-template-columns:1fr 1fr 1fr;position:fixed;bottom:0;left:0;right:0;z-index:60;box-shadow:0 -2px 10px rgba(0,0,0,.12)}
  .fixcta a{text-align:center;padding:12px 4px;font-size:13px;font-weight:700;text-decoration:none;color:#fff}
  .fixcta .t{background:var(--navy)} .fixcta .l{background:#06c755} .fixcta .m{background:var(--gold-d)}
  body{padding-bottom:48px}
  .sec{padding:68px 0}
}
.js .fade{opacity:0;transform:translateY(16px);transition:opacity .7s,transform .7s}
.js .fade.in{opacity:1;transform:none}
.ttl.left{text-align:left;margin-bottom:28px}.ttl.left h2::after{margin-left:0}

.ceo{display:grid;grid-template-columns:360px 1fr;gap:56px;align-items:start;max-width:1040px}
.ceo-photo{margin:0;position:sticky;top:96px}
.ceo-photo img{width:100%;aspect-ratio:900/961;object-fit:cover}
.ceo-photo figcaption{font-family:var(--serif);text-align:center;margin-top:12px;color:var(--navy);letter-spacing:.15em}
.ceo .greet{max-width:none}
@media (max-width:820px){.ceo{grid-template-columns:1fr;gap:28px}.ceo-photo{position:static;max-width:420px;margin:0 auto}}

/* opening animation (top page) */
.opening{position:fixed;inset:0;z-index:200;background:#fff;display:flex;align-items:center;justify-content:center;pointer-events:none;
  animation:introBg 1.3s ease-in-out 1.5s forwards}
.opening img{width:min(240px,52vw);max-width:none;height:auto;flex:none;opacity:0;animation:introLogo 2.9s ease-in-out .2s forwards}
@keyframes introBg{to{background:rgba(255,255,255,0);visibility:hidden}}
@keyframes introLogo{0%{opacity:0;transform:translateY(6px)}28%{opacity:1;transform:none}60%{opacity:1}100%{opacity:0;visibility:hidden}}
.hero::before{animation:heroIn 1.8s ease-out 1.2s both}
@keyframes heroIn{from{filter:blur(14px);transform:scale(1.06)}to{filter:none;transform:none}}
.hero .in > *{animation:heroTx 1.1s ease-out both}
.hero .in > .brand{animation-delay:2.1s}.hero .in > .line{animation-delay:2.3s}.hero .in > h1{animation-delay:2.45s}.hero .in > p{animation-delay:2.65s}
.hero .scroll{animation:heroTx 1s ease-out 3s both}
@keyframes heroTx{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.hero .scroll{transform:translateX(-50%)}
@keyframes heroTx2{from{opacity:0}to{opacity:1}}
.hero .scroll{animation-name:heroTx2}
.no-intro .opening{display:none}
.no-intro .hero::before,.no-intro .hero .in > *,.no-intro .hero .scroll{animation:none}
@media (prefers-reduced-motion:reduce){.opening{display:none}.hero::before,.hero .in > *,.hero .scroll{animation:none}}
.news-item .news-link{margin-top:10px;white-space:normal}