:root{
  --navy:#0f2a47; --blue:#1f6fb2; --sky:#e8f2fb; --line:#d7e3ef;
  --ink:#1c2733; --sub:#56657a; --bg:#ffffff; --soft:#f5f8fb;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;color:var(--ink);background:var(--bg);line-height:1.85;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--blue),#5fb3ea);position:relative;flex:none}
.logo-mark::after{content:"";position:absolute;left:7px;right:7px;top:15px;height:4px;border-radius:2px;background:#fff;box-shadow:0 -7px 0 #ffffffb0,0 7px 0 #ffffff70}
.logo-text{font-weight:700;font-size:17px;letter-spacing:.04em;color:var(--navy);line-height:1.3}
.logo-text small{display:block;font-weight:400;font-size:11px;color:var(--sub);letter-spacing:.08em}
nav ul{display:flex;gap:26px;list-style:none;font-size:14px}
nav a{text-decoration:none;color:var(--ink)}
nav a:hover{color:var(--blue)}
nav .btn-sm{background:var(--blue);color:#fff;padding:8px 16px;border-radius:6px}
nav .btn-sm:hover{color:#fff;background:var(--navy)}
@media (max-width:860px){nav li:not(:last-child){display:none}}
br.sp{display:none}
@media (max-width:640px){
  br.sp{display:inline}
  .logo-text{font-size:14px}
  .logo-text small{font-size:9px}
  .logo-mark{width:28px;height:28px}
  .logo-mark::after{left:6px;right:6px;top:12px}
  nav .btn-sm{padding:7px 10px;font-size:12px;white-space:nowrap}
  header .wrap{height:60px;padding:0 14px}
}

/* notice */
.notice{background:var(--navy);color:#fff;font-size:14px;text-align:center;padding:10px 16px}
.notice strong{color:#9fd3ff;font-weight:700;margin-right:.5em}

/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,#0f2a47 0%,#17497a 55%,#1f6fb2 100%);color:#fff}
.hero svg.pipes{position:absolute;right:-60px;top:0;height:100%;opacity:.18}
.hero .wrap{position:relative;padding:96px 20px 104px}
.hero .eyebrow{font-size:13px;letter-spacing:.2em;color:#9fd3ff;margin-bottom:18px}
.hero h1{font-size:clamp(28px,4.6vw,46px);line-height:1.45;font-weight:700;letter-spacing:.03em;margin-bottom:22px}
.hero p.lead{font-size:clamp(15px,1.8vw,18px);max-width:620px;color:#dbe9f6;margin-bottom:36px}
.cta{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-block;text-decoration:none;font-weight:700;padding:14px 28px;border-radius:8px;font-size:15px;transition:.2s}
.btn-main{background:#fff;color:var(--navy)}
.btn-main:hover{background:#9fd3ff}
.btn-line{border:1px solid #ffffff90;color:#fff}
.btn-line:hover{background:#ffffff18}

/* sections */
section{padding:88px 0}
section.alt{background:var(--soft)}
.sec-head{margin-bottom:44px}
.sec-head .en{font-size:12px;letter-spacing:.24em;color:var(--blue);font-weight:700}
.sec-head h2{font-size:clamp(24px,3vw,32px);color:var(--navy);letter-spacing:.04em;line-height:1.5;margin-top:6px}
.sec-head p{color:var(--sub);margin-top:12px;max-width:680px}

/* strengths */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
@media (max-width:860px){.grid3,.grid2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:30px 28px}
.card .num{font-size:13px;font-weight:700;color:var(--blue);letter-spacing:.12em}
.card h3{font-size:19px;color:var(--navy);margin:8px 0 12px;line-height:1.5}
.card p{color:var(--sub);font-size:15px}

/* services */
.svc{display:flex;gap:18px;align-items:flex-start}
.svc .ic{flex:none;width:48px;height:48px;border-radius:10px;background:var(--sky);display:grid;place-items:center}
.svc .ic svg{width:26px;height:26px;stroke:var(--blue);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.svc ul{list-style:none;margin-top:8px;color:var(--sub);font-size:15px}
.svc li::before{content:"・"}

/* photo */
.ph{border-radius:12px;overflow:hidden;background:repeating-linear-gradient(45deg,#e9f0f7,#e9f0f7 12px,#f3f7fb 12px,#f3f7fb 24px);border:1px dashed #b9cde0;min-height:260px;display:grid;place-items:center;color:#7a8ea5;font-size:14px;text-align:center}
.ph img{width:100%;height:100%;object-fit:cover}
.ph.has-img{border:none;background:none}

/* quality */
.quality{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center}
@media (max-width:860px){.quality{grid-template-columns:1fr}}
.quality h3{font-size:22px;color:var(--navy);margin-bottom:14px;line-height:1.6}
.quality p{color:var(--sub);margin-bottom:12px}
.checks{list-style:none;margin:16px 0}
.checks li{padding-left:28px;position:relative;margin-bottom:6px}
.checks li::before{content:"";position:absolute;left:0;top:8px;width:16px;height:16px;border-radius:50%;background:var(--blue);-webkit-mask:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><circle cx="8" cy="8" r="8"/><path d="M4.5 8.2l2.2 2.2 4.8-4.8" stroke="white" stroke-width="2" fill="none"/></svg>') center/contain no-repeat}

/* profile */
.profile{display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:start}
@media (max-width:860px){.profile{grid-template-columns:1fr}}
.profile .ph{min-height:340px}
.profile .name{font-size:24px;font-weight:700;color:var(--navy)}
.profile .role{color:var(--sub);font-size:14px;margin-bottom:20px}
.timeline{list-style:none;border-left:2px solid var(--line);margin-top:8px}
.timeline li{position:relative;padding:0 0 18px 22px}
.timeline li::before{content:"";position:absolute;left:-7px;top:9px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--blue)}
.timeline b{color:var(--navy)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.tags span{background:var(--sky);color:var(--navy);font-size:13px;padding:5px 12px;border-radius:999px}

/* flow */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:f}
@media (max-width:860px){.flow{grid-template-columns:1fr 1fr}}
.flow div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px 20px;counter-increment:f}
.flow div::before{content:"STEP " counter(f);display:block;font-size:12px;font-weight:700;color:var(--blue);letter-spacing:.12em;margin-bottom:6px}
.flow h4{color:var(--navy);font-size:17px;margin-bottom:6px}
.flow p{font-size:14px;color:var(--sub)}

/* company */
table.co{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;border:1px solid var(--line)}
table.co th,table.co td{text-align:left;padding:18px 22px;border-bottom:1px solid var(--line);vertical-align:top;font-size:15px}
table.co th{width:200px;background:var(--soft);color:var(--navy);font-weight:700}
table.co tr:last-child th,table.co tr:last-child td{border-bottom:none}
table.co small{color:var(--sub)}
@media (max-width:640px){table.co th{width:108px;padding:14px}table.co td{padding:14px}}

/* contact */
.contact{background:linear-gradient(135deg,#0f2a47,#1f6fb2);color:#fff;text-align:center}
.contact h2{font-size:clamp(24px,3vw,32px);margin-bottom:14px}
.contact p{color:#dbe9f6;margin-bottom:32px}
.contact .tel{margin-top:28px;font-size:15px;color:#dbe9f6}
.contact .tel b{font-size:24px;color:#fff;letter-spacing:.06em;display:block}

footer{background:#0b1f35;color:#9fb3c8;font-size:13px;padding:36px 0}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer a{color:#cfe3f5}

/* kessan page */
.page-title{background:var(--navy);color:#fff;padding:56px 0}
.page-title h1{font-size:28px}
.doc{max-width:760px}
.doc p{margin-bottom:16px}
.doc .box{border:1px solid var(--line);border-radius:12px;padding:24px;background:var(--soft);color:var(--sub)}