:root{
  --teal:#17A5AF; --teal-light:#5AC2D5; --teal-deep:#0E7C84;
  --ink:#3F3A39; --ink-soft:#6B6665; --line:#E3EEEF;
  --bg:#FFFFFF; --bg-soft:#F2F8F9;
  --en:"Jost","Helvetica Neue",Arial,sans-serif;
  --ja:"Noto Sans JP","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--ja);color:var(--ink);background:var(--bg);line-height:1.9;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* header */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:88px}
.logo img{height:60px;width:auto}
.nav ul{display:flex;align-items:center;gap:36px;list-style:none}
.nav a{display:flex;flex-direction:column;align-items:center;line-height:1.3;transition:color .2s}
.nav a .en{font-family:var(--en);font-size:16px;font-weight:500;letter-spacing:.08em}
.nav a .ja{font-size:11px;color:var(--ink-soft);letter-spacing:.1em}
.nav a:hover{color:var(--teal)}
.nav .contact-btn{background:var(--teal);color:#fff;padding:11px 24px;border-radius:999px}
.nav .contact-btn .ja{color:rgba(255,255,255,.85)}
.nav .contact-btn:hover{background:var(--teal-deep);color:#fff}
.menu-btn{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;position:relative}
.menu-btn span{position:absolute;left:10px;right:10px;height:2px;background:var(--ink);transition:.25s}
.menu-btn span:nth-child(1){top:15px}.menu-btn span:nth-child(2){top:21px}.menu-btn span:nth-child(3){top:27px}
.open .menu-btn span:nth-child(1){top:21px;transform:rotate(45deg)}
.open .menu-btn span:nth-child(2){opacity:0}
.open .menu-btn span:nth-child(3){top:21px;transform:rotate(-45deg)}

/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,#fff 0%,#fff 45%,var(--bg-soft) 100%)}
.hero .wrap{position:relative;min-height:580px;display:flex;align-items:center;padding-top:40px;padding-bottom:80px}
.hero-mark{position:absolute;right:24px;top:50%;transform:translateY(-50%);width:340px;opacity:.95;pointer-events:none}
.hero-text{position:relative;max-width:620px}
.eyebrow{font-family:var(--en);font-size:14px;letter-spacing:.24em;color:var(--teal);font-weight:500;margin-bottom:20px}
.hero h1{font-size:48px;line-height:1.45;font-weight:700;letter-spacing:.04em;margin-bottom:24px}
.hero h1 .accent{color:var(--teal)}
.hero p.lead{font-size:17px;color:var(--ink-soft);margin-bottom:40px}
.btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 30px;border-radius:999px;font-weight:500;font-size:15px;transition:.2s}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-deep)}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(4px)}

/* sections */
section{padding:110px 0}
.sec-head{margin-bottom:56px}
.sec-head .en{font-family:var(--en);font-size:44px;font-weight:500;letter-spacing:.06em;line-height:1.1;color:var(--ink)}
.sec-head .en::first-letter{color:var(--teal)}
.sec-head .ja{font-size:14px;color:var(--teal);letter-spacing:.14em;margin-top:10px;font-weight:500}

/* policy */
.policy{background:var(--bg-soft)}
.policy .grid{display:grid;grid-template-columns:1fr 1.3fr;gap:64px;align-items:start}
.policy h2.catch{font-size:30px;line-height:1.6;font-weight:700;letter-spacing:.04em}
.policy .body p+p{margin-top:1.2em}

/* business */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:40px 32px 36px;position:relative;transition:.25s;display:flex;flex-direction:column}
.card:hover{border-color:var(--teal-light);box-shadow:0 18px 40px -20px rgba(23,165,175,.45);transform:translateY(-4px)}
.card .num{font-family:var(--en);font-size:13px;color:var(--teal);letter-spacing:.2em;font-weight:500}
.card .icon{width:56px;height:56px;border-radius:14px;background:var(--bg-soft);display:grid;place-items:center;margin:18px 0 22px;color:var(--teal)}
.card .icon svg{width:30px;height:30px}
.card h3{font-size:20px;font-weight:700;line-height:1.5}
.card .card-en{font-family:var(--en);font-size:13px;color:var(--ink-soft);letter-spacing:.06em;margin-bottom:16px;flex:none}
.card p{font-size:15px;color:var(--ink-soft);flex:1}
.card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.card .tags span{font-size:12px;background:var(--bg-soft);color:var(--teal-deep);padding:4px 12px;border-radius:999px}
.more{text-align:center;margin-top:56px}

/* origin */
.origin{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.origin .sec-head .en{color:#fff}
.origin .sec-head .ja{color:var(--teal-light)}
.formula{display:flex;align-items:center;justify-content:center;gap:28px;flex-wrap:wrap;margin:10px 0 40px;font-family:var(--en)}
.formula .term{text-align:center}
.formula .word{font-size:40px;font-weight:500;letter-spacing:.06em}
.formula .word b{color:var(--teal-light);font-weight:600}
.formula .note{font-family:var(--ja);font-size:13px;color:rgba(255,255,255,.65);margin-top:4px}
.formula .op{font-size:34px;color:rgba(255,255,255,.5);margin-top:-30px}
.formula .result{font-size:40px;font-weight:600;letter-spacing:.1em;color:var(--teal-light)}
.origin p.desc{max-width:680px;margin:0 auto;text-align:center;color:rgba(255,255,255,.8)}

/* contact */
.contact{padding:110px 0}
.contact-box{background:linear-gradient(120deg,var(--teal) 0%,var(--teal-light) 100%);border-radius:24px;padding:64px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:40px;position:relative;overflow:hidden}
.contact-box .en{font-family:var(--en);font-size:40px;font-weight:500;letter-spacing:.06em;line-height:1.1}
.contact-box p{margin-top:14px;opacity:.92}
.btn-white{background:#fff;color:var(--teal-deep);font-weight:700;white-space:nowrap}
.btn-white:hover{background:var(--ink);color:#fff}

/* footer */
.footer{background:#2E2A29;color:rgba(255,255,255,.75);padding:64px 0 28px;font-size:14px}
.footer .top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer .f-logo img{height:36px;width:auto;margin-bottom:16px}
.footer ul{list-style:none;display:flex;gap:28px;flex-wrap:wrap}
.footer ul a:hover{color:var(--teal-light)}
.footer small{display:block;margin-top:24px;font-family:var(--en);letter-spacing:.06em;color:rgba(255,255,255,.5)}

/* responsive */
@media (max-width:1080px){
  .nav ul{gap:22px}
}
@media (max-width:960px){
  .hero-mark{width:300px;right:-60px;opacity:.3}
  .cards{grid-template-columns:1fr}
  .policy .grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:820px){
  .menu-btn{display:block}
  .nav{position:fixed;inset:88px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .3s}
  .open .nav{max-height:480px}
  .nav ul{flex-direction:column;align-items:stretch;gap:0;padding:8px 24px 24px}
  .nav li{border-bottom:1px solid var(--line)}
  .nav li:last-child{border:0;padding-top:16px}
  .nav a{flex-direction:row;justify-content:space-between;padding:16px 4px}
  .nav .contact-btn{justify-content:center;gap:12px}
}
@media (max-width:600px){
  body{font-size:15px}
  .header .wrap{height:64px}
  .nav{inset:64px 0 auto 0}
  .logo img{height:40px}
  .hero .wrap{min-height:auto;padding-top:56px;padding-bottom:72px}
  .hero-mark{width:220px;right:-70px;top:30%;opacity:.2}
  .hero h1{font-size:31px}
  .hero p.lead{font-size:15px}
  .btn{padding:14px 24px;width:100%;justify-content:center}
  section{padding:76px 0}
  .sec-head{margin-bottom:36px}
  .sec-head .en{font-size:34px}
  .policy h2.catch{font-size:23px}
  .card{padding:32px 24px 28px}
  .formula{flex-direction:column;gap:6px}
  .formula .word,.formula .result{font-size:30px}
  .formula .op{font-size:24px;margin-top:0}
  .contact{padding:76px 0}
  .contact-box{flex-direction:column;align-items:flex-start;padding:40px 28px}
  .contact-box .en{font-size:32px}
}

/* ===== sub pages ===== */

/* privacy policy */
.doc{font-size:15px;line-height:2}
.doc .doc-lead{margin-bottom:40px}
.doc h2{font-size:18px;font-weight:700;margin:40px 0 12px;padding-left:14px;border-left:4px solid var(--teal);line-height:1.5}
.doc p+p{margin-top:.8em}
.doc ul{margin:10px 0 0 1.4em}
.doc li{margin:.2em 0}
.doc a{color:var(--teal-deep);text-decoration:underline}
.doc .doc-date{margin-top:48px;text-align:right;color:var(--ink-soft);font-size:14px}
@media (max-width:600px){.doc{font-size:14px}.doc h2{font-size:16px;margin-top:32px}}
/* headings markup (SEO) */
.page-head h1.title{font-weight:inherit}
.page-head h1.title span{display:block}
h2.sec-head{font-weight:inherit;font-size:inherit}
h2.sec-head span{display:block}

.nav a.current{color:var(--teal)}
.page-head{background:var(--bg-soft);position:relative;overflow:hidden}
.page-head .wrap{padding-top:80px;padding-bottom:72px;position:relative}
.page-head .en{font-family:var(--en);font-size:52px;font-weight:500;letter-spacing:.06em;line-height:1.1}
.page-head .en::first-letter{color:var(--teal)}
.page-head .ja{font-size:15px;color:var(--teal);letter-spacing:.14em;margin-top:12px;font-weight:500}
.page-head .deco{position:absolute;right:4%;top:50%;transform:translateY(-50%);width:150px;opacity:.9}
.crumb{font-size:12px;color:var(--ink-soft);margin-bottom:28px;letter-spacing:.04em}
.crumb a:hover{color:var(--teal)}
.narrow{max-width:860px}
.lead-text{font-size:17px;line-height:2.1}
.lead-text p+p{margin-top:1.1em}

/* company */
.profile{border-top:1px solid var(--line)}
.profile .row{display:grid;grid-template-columns:180px 1fr;gap:24px;padding:26px 8px;border-bottom:1px solid var(--line)}
.profile dt{font-weight:700;color:var(--ink)}
.profile dd .note{display:block;font-size:13px;color:var(--ink-soft);margin-top:8px;line-height:1.8}

/* business detail */
.biz{display:grid;grid-template-columns:120px 1fr;gap:40px;padding:64px 0;border-bottom:1px solid var(--line)}
.biz:first-child{padding-top:0}
.biz:last-child{border-bottom:0;padding-bottom:0}
.biz .no{font-family:var(--en);font-size:64px;font-weight:500;color:var(--teal);line-height:1}
.biz .no small{display:block;font-size:12px;letter-spacing:.2em;color:var(--ink-soft);margin-top:10px}
.biz h2{font-size:28px;font-weight:700;line-height:1.5}
.biz .biz-en{font-family:var(--en);font-size:14px;color:var(--ink-soft);letter-spacing:.06em;margin-bottom:22px}
.biz .desc{margin-bottom:28px}
.biz .items{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.biz .item{background:var(--bg-soft);border-radius:14px;padding:24px 26px}
.biz .item h3{font-size:17px;font-weight:700;color:var(--teal-deep);margin-bottom:8px;display:flex;align-items:center;gap:10px}
.biz .item h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--teal)}
.biz .item p{font-size:15px;color:var(--ink-soft);line-height:1.85}

/* works */
.works-label{font-size:20px;font-weight:700;margin-bottom:28px;display:flex;align-items:center;gap:12px}
.works-label::before{content:"";width:28px;height:3px;background:var(--teal);border-radius:2px}
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.work{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;transition:.25s;display:flex;flex-direction:column}
.work:hover{border-color:var(--teal-light);box-shadow:0 18px 40px -22px rgba(23,165,175,.5);transform:translateY(-4px)}
.work img{aspect-ratio:470/250;object-fit:cover;width:100%}
.work .body{padding:20px 22px 22px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.work h3{font-size:17px;font-weight:700}
.work .go{font-size:13px;color:var(--teal);white-space:nowrap}

/* message box (recruit / contact) */
.msg{background:var(--bg-soft);border-radius:20px;padding:56px;text-align:center}
.msg h2{font-size:24px;font-weight:700;margin-bottom:14px}
.msg p{color:var(--ink-soft)}
.msg .btns{justify-content:center;margin-top:32px}
.mail-addr{font-family:var(--en);font-size:30px;font-weight:500;letter-spacing:.04em;color:var(--ink);margin:26px 0 6px}
.msg .small{font-size:13px;margin-top:22px}

@media (max-width:960px){
  .works-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:600px){
  .page-head .wrap{padding-top:44px;padding-bottom:48px}
  .page-head .en{font-size:30px}
  .page-head .deco{width:84px;right:-10px;opacity:.35}
  .crumb{margin-bottom:18px}
  .lead-text{font-size:15px}
  .profile .row{grid-template-columns:1fr;gap:6px;padding:20px 4px}
  .biz{grid-template-columns:1fr;gap:16px;padding:48px 0}
  .biz .no{font-size:44px}
  .biz h2{font-size:22px}
  .biz .items{grid-template-columns:1fr}
  .works-grid{grid-template-columns:1fr}
  .msg{padding:40px 22px}
  .msg h2{font-size:20px}
  .mail-addr{font-size:22px}
}