:root{
  --main:#009490;--main-soft:#dff1f0;--main-deep:#007e7a;
  --accent:#ea6e8e;--accent-soft:#fbe5eb;
  --bg1:#f4f6f8;
  --ink:#1a232e;
  --gray:#5a6573;--line:#e1e6ea
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;color:var(--ink);background:#ffffff;line-height:1.9;font-feature-settings:"palt";-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* NAV */
.nav{position:sticky;top:0;background:#ffffff;z-index:100;transition:box-shadow .3s,border-color .3s;border-bottom:1px solid transparent}
.nav.scrolled{box-shadow:0 4px 18px -8px rgba(20,40,40,.18);border-bottom-color:var(--line)}
.nav-in{max-width:1280px;margin:0 auto;padding:18px 32px;display:flex;justify-content:space-between;align-items:center;gap:32px}
.logo img{height:52px}
.nav-r{display:flex;align-items:center;gap:36px;margin-left:auto}
.menu{display:flex;gap:36px;font-size:14px;font-weight:600;letter-spacing:.03em}
.menu a{position:relative;padding:6px 0 8px}
.menu a::before{content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--main);opacity:.45}
.menu a:hover{color:var(--main)}
.menu a.current{color:var(--main)}
.menu a.current::before{opacity:1}
.cta-nav{background:var(--main);color:#fff;padding:13px 28px;border-radius:999px;font-size:12.5px;font-weight:700;box-shadow:0 6px 16px -8px rgba(0,148,144,.45)}

.crumb{max-width:1280px;margin:0 auto;padding:18px 32px 0;font-size:11.5px;color:var(--gray)}
.crumb span{margin:0 8px;opacity:.5}

.page-strip{padding:24px 32px 14px;background:#fff;text-align:center}
.page-strip p.tag{font-size:12px;color:var(--accent);letter-spacing:.2em;font-weight:800;margin-bottom:12px}
.page-strip h1{font-size:clamp(32px,4.2vw,52px);font-weight:900;letter-spacing:.01em}
.page-strip h1 em{font-style:normal;color:var(--main)}

.b-wrap{display:grid;grid-template-columns:220px 1fr;max-width:1280px;margin:0 auto;padding:8px 32px 0;gap:64px;position:relative}
.b-toc{position:sticky;top:96px;height:fit-content;align-self:start;padding:32px 0}
.b-toc-label{font-size:10px;color:var(--gray);letter-spacing:.2em;font-weight:800;margin-bottom:18px}
.b-toc ul{list-style:none;padding-left:0;border-left:1px solid var(--line)}
.b-toc li{position:relative}
.b-toc li a{display:block;padding:11px 0 11px 20px;font-size:12.5px;color:var(--gray);font-weight:600;letter-spacing:.03em;border-left:2px solid transparent;margin-left:-1px;transition:color .25s,border-color .25s,padding-left .25s}
.b-toc li a:hover,.b-toc li a.active{color:var(--main);border-left-color:var(--main);padding-left:28px}

.b-content{padding:8px 0 80px}
.b-sec{padding:48px 0;border-bottom:1px solid var(--line)}
.b-sec:last-child{border-bottom:none}
.b-sec-head{margin-bottom:24px}
.b-sec-en{font-size:11px;color:var(--accent);letter-spacing:.2em;font-weight:800;margin-bottom:8px}
.b-sec h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;letter-spacing:.01em}
.b-sec h2 em{font-style:normal;color:var(--main)}
.b-sec p.body{font-size:14.5px;color:var(--ink);line-height:2.1;margin-bottom:20px}
.b-sec p.body.muted{color:var(--gray)}

/* 事業の柱 — 2大事業のカード */
.biz-pillars{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:24px}
@media(max-width:840px){.biz-pillars{grid-template-columns:1fr}}
.pillar{background:#fff;border:1px solid var(--line);padding:28px;position:relative;overflow:hidden;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;height:100%}
.pillar:hover{transform:translateY(-3px);box-shadow:0 14px 30px -16px rgba(0,148,144,.2)}
.pillar::before{content:"";position:absolute;left:0;top:0;height:100%;width:3px;background:var(--main)}
.pillar.ses::before{background:var(--accent)}
.pillar-illu{width:100%;height:130px;margin-bottom:16px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.pillar-illu svg{width:100%;height:100%}
.pillar h3{font-size:18px;font-weight:800;margin-bottom:8px;color:var(--main)}
.pillar.ses h3{color:var(--accent)}
.pillar p{font-size:13.5px;color:var(--ink);line-height:1.9}
.pillar .link-arrow{display:flex;align-items:center;gap:6px;margin-top:auto;padding-top:18px;font-size:12px;font-weight:700;color:var(--main);letter-spacing:.05em;width:fit-content}
.pillar.ses .link-arrow{color:var(--accent)}

/* 請負開発 — 概要+事例 */
.cd-intro{font-size:14.5px;color:var(--ink);line-height:2.1;margin-bottom:24px}
.cd-cases{display:flex;flex-direction:column;gap:18px;margin-top:18px}
.case{background:#fff;border:1px solid var(--line);padding:24px 28px;display:grid;grid-template-columns:200px 1fr;gap:28px;align-items:start}
@media(max-width:840px){.case{grid-template-columns:1fr}}
.case.rich{grid-template-columns:1fr 380px}
@media(max-width:840px){
  .case{padding:18px 16px;gap:6px}
  .case.rich{grid-template-columns:1fr;gap:6px}
  .case.rich > div:not(.case-media){display:contents}
  .case.rich .case-meta{order:-2;text-align:left;margin-bottom:0}
  .case.rich h4{order:-1;text-align:left;font-size:16px;line-height:1.4;margin:0}
  .case.rich .case-img{min-height:auto;padding:8px}
  .case.rich .case-media{margin:0}
  .case.rich .case-media .ai-tags{margin-top:6px}
}
.case.rich .case-img{min-height:auto;background:#fff;padding:14px;cursor:zoom-in;transition:box-shadow .25s}
.case.rich .case-img:hover{box-shadow:0 8px 24px -8px rgba(0,148,144,.25)}
.case.rich .case-img svg{width:100%;height:auto;max-height:none}

/* ===== 画像ポップアップ ===== */
.img-modal{position:fixed;inset:0;background:rgba(20,40,40,.92);display:none;align-items:center;justify-content:center;z-index:1000;padding:0}
.img-modal.open{display:flex}
.img-modal-inner{background:transparent;position:relative;padding:0;display:flex;align-items:center;justify-content:center;width:100vw;height:100vh}
.img-modal-body{display:flex;align-items:center;justify-content:center}
.img-modal-body svg{width:min(70vw,90vh,1000px);height:min(46.67vw,60vh,666px);display:block;background:#fff;box-shadow:0 20px 60px -10px rgba(0,0,0,.4)}
.img-modal-close{position:fixed;top:16px;right:16px;width:44px;height:44px;border-radius:50%;background:var(--main);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,transform .2s;z-index:1001;box-shadow:0 6px 16px -4px rgba(0,0,0,.5)}
.img-modal-close:hover{background:var(--main-deep);transform:scale(1.08)}
.img-modal-close svg{width:18px;height:18px}
.case-img{background:var(--bg1);border:1px solid var(--line);min-height:120px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.case-img img{width:100%;height:100%;max-height:160px;object-fit:contain;padding:8px}
.case-img.illu{padding:14px}
.case-img.illu svg{width:100%;height:auto;max-height:130px}
.case-meta{font-size:11px;color:var(--main);font-weight:800;letter-spacing:.15em;margin-bottom:6px}
.case-meta.app{color:var(--main)}
.case-meta.web{color:var(--accent)}
.case h4{font-size:16px;font-weight:800;margin-bottom:10px}
.case-cols{display:grid;grid-template-columns:56px 1fr;gap:6px 16px;font-size:12.5px;color:var(--ink);line-height:1.85}
.case-cols .lbl{color:var(--gray);font-weight:700;font-size:11px;letter-spacing:.05em;padding-top:3px}
.case-cols .val{color:var(--ink)}

/* AI駆動開発 */
.ai-block{background:#fff;border:1px solid var(--line);padding:32px;margin-top:18px;position:relative;overflow:hidden}
.ai-block::before{content:"";position:absolute;left:0;top:0;height:100%;width:3px;background:linear-gradient(180deg,var(--main),var(--accent))}
.ai-lead{font-size:15px;font-weight:800;color:var(--main);margin-bottom:14px;letter-spacing:.02em}
.ai-body{font-size:13.5px;color:var(--ink);line-height:2;margin-bottom:20px}
.ai-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.ai-tag{display:inline-flex;align-items:center;gap:6px;background:var(--main-soft);color:var(--main-deep);padding:8px 14px;font-size:12px;font-weight:700;border-radius:999px}
.ai-tag.accent{background:var(--accent-soft);color:var(--accent)}
.ai-pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
@media(max-width:840px){.ai-pillars{grid-template-columns:1fr}}
.ai-pillar{background:var(--bg1);border:1px solid var(--line);padding:18px 20px}
.ai-pillar h5{font-size:12.5px;font-weight:800;color:var(--main);letter-spacing:.05em;margin-bottom:6px}
.ai-pillar p{font-size:12.5px;color:var(--ink);line-height:1.85}

/* SES — 概要 + 強み */
.ses-hero{margin-top:18px;background:#fff;border:1px solid var(--line);padding:32px;display:grid;grid-template-columns:1fr 220px;gap:36px;align-items:center}
@media(max-width:840px){.ses-hero{grid-template-columns:1fr}}
.ses-hero-text p{font-size:14px;line-height:2.1;color:var(--ink);margin-bottom:14px}
.ses-hero-text p:last-child{margin-bottom:0}
.ses-illu{width:100%;display:flex;justify-content:center}
.ses-illu svg{width:100%;height:auto;max-width:220px}

.ses-quote{background:var(--main-soft);border-left:3px solid var(--main);padding:20px 24px;margin-top:18px;font-size:13.5px;color:var(--main-deep);line-height:1.9}
.ses-quote b{display:block;font-size:12px;color:var(--main);font-weight:800;letter-spacing:.1em;margin-bottom:6px}

.ses-strengths{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
@media(max-width:840px){.ses-strengths{grid-template-columns:1fr}}
.ses-strength{background:#fff;border:1px solid var(--line);padding:20px 22px;text-align:left}
.ses-strength .num{display:inline-block;font-size:11px;font-weight:800;color:var(--accent);letter-spacing:.15em;margin-bottom:8px}
.ses-strength h5{font-size:14px;font-weight:800;margin-bottom:8px;color:var(--ink)}
.ses-strength p{font-size:12.5px;color:var(--gray);line-height:1.85}

/* CTA — 立幅半分（標準化） */
.b-cta{background:var(--main);color:#fff;padding:40px 32px;text-align:center;margin-top:60px}
.b-cta h3{font-size:20px;font-weight:800;margin-bottom:8px}
.b-cta p{opacity:.9;font-size:13px;margin-bottom:18px}
.b-cta a{display:inline-block;background:#fff;color:var(--main);padding:12px 32px;border-radius:999px;font-weight:700;font-size:13px}

/* Footer */
footer{background:#ffffff;color:var(--ink);padding:60px 32px 28px;border-top:4px solid var(--main);position:relative}
footer::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,var(--main),var(--accent));opacity:.85}
.f-in{max-width:1280px;margin:0 auto 36px;display:grid;grid-template-columns:1.2fr 2fr;gap:64px;align-items:start}
.f-l img{height:36px;margin-bottom:18px}
.f-d{font-size:12.5px;color:var(--gray);line-height:1.85}
.f-links-wrap{display:flex;flex-direction:column;gap:18px}
.f-links-label{font-size:10.5px;color:var(--main);font-weight:800;letter-spacing:.2em}
.f-links{display:flex;flex-wrap:wrap;gap:14px 28px}
.f-links a{font-size:12.5px;color:var(--ink);font-weight:600}
.f-links a:hover{color:var(--main)}
.cp{max-width:1280px;margin:0 auto;border-top:1px solid var(--line);padding-top:20px;text-align:center;font-size:10.5px;color:var(--gray);letter-spacing:.08em}

/* Mobile toggles (hidden on desktop) */
.menu-toggle{display:none}
.toc-toggle{display:none}

/* Scroll-to-top button */
.to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:var(--main);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px -6px rgba(0,148,144,.4);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .3s,visibility .3s,transform .3s,background .25s;z-index:200;font-size:0}
.to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--main-deep);transform:translateY(-2px)}
.to-top svg{width:18px;height:18px;stroke:#fff;stroke-width:2.5;fill:none;stroke-linecap:round;stroke-linejoin:round}

@media(max-width:840px){
  .to-top{display:none!important}
  .b-wrap{grid-template-columns:1fr;padding:0 24px;gap:24px}
  /* Nav: hamburger toggle */
  .nav-in{flex-wrap:wrap}
  .menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;width:32px;height:32px;background:none;border:none;cursor:pointer;padding:0;margin-left:auto}
  .menu-toggle span{display:block;width:24px;height:2px;background:var(--ink);transition:transform .3s,opacity .3s}
  .menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav-r{display:none;width:100%;flex-direction:column;gap:0;align-items:stretch;padding:12px 0 4px;border-top:1px solid var(--line);margin-top:14px;margin-left:0}
  .nav-r.open{display:flex}
  .menu{display:flex;flex-direction:column;gap:0;width:100%}
  .menu a{padding:14px 0;border-bottom:1px solid var(--line)}
  .menu a::before{display:none}
  .cta-nav{margin-top:12px;text-align:center;padding:13px 20px;align-self:stretch}
  /* TOC: hamburger toggle */
  .b-toc{position:static;padding:0;border-bottom:1px solid var(--line)}
  .b-toc-label{display:none}
  .toc-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:16px 0;background:none;border:none;cursor:pointer}
  .toc-toggle-label{font-size:11px;letter-spacing:.2em;font-weight:800;color:var(--main)}
  .toc-toggle-icon{color:var(--main);display:flex;align-items:center;transition:transform .3s}
  .b-toc.open .toc-toggle-icon{transform:rotate(180deg)}
  .b-toc ul{display:none;border-left:none;padding:8px 0 14px;border-top:1px solid var(--line)}
  .b-toc.open ul{display:block}
  .b-toc li a{padding:12px 0 12px 14px;border-left:2px solid transparent}
  .b-toc li a:hover,.b-toc li a.active{padding-left:14px;color:var(--main);border-left-color:var(--main)}
  .f-in{grid-template-columns:1fr;gap:32px}
}

/* 事業内容 overview (4 categories) */
.b-services{margin:0}
.b-services-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px;max-width:820px}
.b-services-list li{display:flex;align-items:center;gap:16px;padding:20px 22px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--main);border-radius:6px;transition:transform .25s,box-shadow .25s}
.b-services-list li:hover{transform:translateY(-2px);box-shadow:0 12px 24px -14px rgba(0,148,144,.28)}
.b-services-list .s-num{font-family:"Segoe UI",system-ui,sans-serif;font-size:22px;font-weight:800;color:var(--main);letter-spacing:.05em;min-width:38px}
.b-services-list .s-name{font-size:15.5px;font-weight:800;color:var(--ink);letter-spacing:.02em}
@media(max-width:640px){.b-services-list{grid-template-columns:1fr}}

/* Quality by Design セクション（AI駆動開発内に埋め込み） */
.quality-embed{margin-top:48px;padding-top:36px;border-top:1px dashed var(--line)}
.quality-embed .quality-h{font-size:clamp(20px,2.4vw,26px);font-weight:800;letter-spacing:.01em}
.quality-embed .quality-h em{font-style:normal;color:var(--main)}
.quality-wrap{max-width:940px}
.quality-wrap .q-lead{font-size:15px;line-height:1.65;color:var(--ink);margin:0 0 22px;text-wrap:pretty}
.quality-wrap strong{color:var(--main-deep);font-weight:700}
.q-flow-block{background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px;margin:24px 0;box-shadow:0 1px 0 rgba(20,48,46,.03),0 18px 40px -30px rgba(0,148,144,.35)}
.q-flow-title{font-size:14px;font-weight:700;color:var(--ink);margin:0 0 18px;display:flex;align-items:center;gap:9px}
.q-flow-title .q-dot{width:8px;height:8px;border-radius:50%;background:var(--main)}
.q-flow{display:flex;align-items:stretch;gap:12px}
.q-step{flex:1;background:var(--main-soft);border:1px solid #cfe1df;border-radius:10px;padding:18px 16px;display:flex;flex-direction:column;gap:10px;min-width:0}
.q-num{font-size:11px;font-weight:800;letter-spacing:.14em;color:var(--main-deep);font-variant-numeric:tabular-nums}
.q-step h3{margin:0;font-size:14.5px;line-height:1.5;color:var(--ink);font-weight:700}
.q-step p{margin:0;font-size:12.5px;color:var(--gray);line-height:1.7}
.q-arrow{flex:0 0 auto;align-self:center;color:var(--main);font-size:22px;font-weight:700}
.q-loop{margin-top:16px;padding-top:14px;border-top:1px dashed #cfe1df;display:flex;align-items:center;justify-content:center;gap:10px;font-size:13px;font-weight:700;color:var(--main-deep)}
.q-loop .q-loop-ico{font-size:16px}
.q-breadth{margin:24px 0 8px}
.q-breadth .q-label{font-size:11px;letter-spacing:.14em;font-weight:700;color:var(--gray);text-transform:uppercase;margin:0 0 12px}
.q-chips{display:flex;flex-wrap:wrap;gap:9px}
.q-chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px;font-size:13px;color:var(--ink);font-weight:600}
.q-chip span{color:var(--main-deep)}
.q-breadth-note{margin-top:12px;font-size:13.5px;color:var(--ink);line-height:1.85}
.q-close{margin-top:24px;padding:22px 24px;background:var(--ink);border-radius:12px;color:#eaf3f2}
.q-close p{margin:0;font-size:15px;line-height:1.75;font-weight:600}
.q-close .q-em{color:#7fd6d2}
@media(max-width:640px){.q-flow{flex-direction:column}.q-arrow{transform:rotate(90deg);align-self:center}}

/* CASE技術タグ */
.case-media{min-width:0}
.case-media .ai-tags{margin-top:12px}
.ai-tags.case-tech{flex-wrap:wrap;gap:6px;overflow:visible}
.ai-tags.case-tech .ai-tag{flex:0 0 auto;white-space:nowrap;padding:6px 12px;font-size:11px}
.menu-top-mobile{display:none}
@media(max-width:840px){.menu-top-mobile{display:block;color:var(--main)!important;font-weight:800;background:var(--main-soft,#dff1f0);padding:14px 16px!important;margin:-12px -12px 4px;border-radius:4px}.menu-top-mobile::before{display:none!important}}

/* 代理店販売 製品カード */
.agency-products{display:flex;flex-direction:column;gap:16px;margin-top:24px}
.agency-card{display:grid;grid-template-columns:180px 1fr;gap:28px;background:#fff;border:1px solid var(--line);border-left:5px solid var(--main);border-radius:8px;padding:22px 26px;align-items:center}
.agency-logo{display:flex;align-items:center;justify-content:center;min-height:80px}
.agency-logo img{max-width:160px;max-height:76px;width:auto;height:auto;object-fit:contain}
.agency-info h3{font-size:17px;font-weight:800;color:var(--ink);margin:0 0 4px;letter-spacing:.02em}
.agency-info .agency-tagline{font-size:12.5px;color:var(--main-deep);font-weight:700;margin-bottom:8px;letter-spacing:.02em}
.agency-info .agency-desc{font-size:13px;color:var(--ink);line-height:1.9;margin:0}
@media(max-width:640px){
  .agency-card{grid-template-columns:1fr;padding:18px 20px;gap:14px}
  .agency-logo{min-height:60px}
  .agency-logo img{max-height:60px}
}

/* Biz nav — 他の事業への遷移（モバイルのみ） */
.biz-nav{display:none}
@media(max-width:840px){
  .biz-nav{display:block;margin-top:24px;padding:0;border:none}
  .biz-nav-head{text-align:center;margin-bottom:10px}
  .biz-nav-head .b-sec-en{color:var(--main);letter-spacing:.28em;font-size:11px;font-weight:800;margin:0}
  .biz-nav-head h3{display:none}
  .biz-nav-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
  .biz-nav-card{position:relative;display:flex;flex-direction:row;justify-content:center;align-items:center;text-align:center;gap:4px;padding:10px 6px;background:linear-gradient(#fff,#fff) padding-box,linear-gradient(135deg,var(--main),var(--accent)) border-box;border:1.5px solid transparent;border-radius:8px;text-decoration:none;color:var(--ink);white-space:nowrap}
  .biz-nav-en{display:none}
  .biz-nav-jp{font-size:11px;font-weight:800;color:var(--ink);line-height:1.3}
  .biz-nav-arrow{position:static;font-size:11px;color:var(--main);font-weight:900}
}