/* =========================================================
   オンケイ合同会社  style.css  — モバイルファースト全面刷新
   （情報・フォント・色・写真サイズは従来どおり／スマホ＝1列を既定）
   ========================================================= */
:root{
  --ink:#182838; --primary:#1f5c9e; --primary-dark:#143f72; --primary-soft:#e9f1fa;
  --accent:#d8b06a; --accent-dark:#96702a; --bg:#fff; --bg-soft:#f7f5ef; --bg-soft2:#eef4fa;
  --line:#e7e6de; --muted:#5c6975; --danger:#a5442f; --radius:16px; --radius-lg:24px;
  --shadow:0 10px 34px rgba(20,40,70,.08); --shadow-sm:0 4px 16px rgba(20,40,70,.06);
  --maxw:1120px;
  --font-sans:"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",Meiryo,system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Hiragino Mincho ProN","Yu Mincho","Noto Serif JP",serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--bg);font-family:var(--font-sans);
  line-height:1.85;font-size:16px;letter-spacing:.01em;font-feature-settings:"palt";
  overflow-x:hidden;text-align:left;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary-dark);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 18px}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:8px;top:8px;position:fixed;background:var(--primary);color:#fff;padding:10px 14px;z-index:200}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 0;flex-wrap:wrap}
.brand{display:flex;flex-direction:column;line-height:1.3}
.brand:hover{text-decoration:none}
.brand-name{font-weight:800;font-size:1.05rem;color:var(--ink)}
.brand-sub{font-size:.68rem;color:var(--muted)}
.global-nav{display:flex;flex-wrap:wrap;gap:2px}
.global-nav a{color:var(--ink);font-size:.82rem;font-weight:600;padding:7px 9px;border-radius:8px;white-space:nowrap}
.global-nav a:hover{background:var(--bg-soft2);text-decoration:none;color:var(--primary-dark)}
.nav-cta{background:var(--primary);color:#fff !important}

/* Buttons */
.btn{display:inline-block;padding:14px 26px;border-radius:999px;font-weight:700;font-size:.98rem;text-align:center;border:2px solid transparent;cursor:pointer;transition:.18s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-accent{background:var(--accent);color:#2a2010}
.btn-accent:hover{background:var(--accent-dark);color:#fff}
.btn-ghost{background:#fff;color:var(--primary-dark);border-color:var(--primary)}
.btn-ghost:hover{background:var(--primary-soft)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* Hero */
.hero{background:linear-gradient(160deg,#143f72,#1f5c9e 60%,#3f83c4);color:#fff;position:relative;overflow:hidden}
.hero-inner{padding:48px 0 44px;position:relative;z-index:1}
.hero .eyebrow{color:#ecd8ab}
.hero h1{font-family:var(--font-serif);font-size:1.65rem;line-height:1.5;margin:.35em 0 .5em;font-weight:800}
.hero h1 em{font-style:normal;color:#f0d99b}
.hero-lead{font-size:1rem;line-height:1.9;color:#eaf3f1}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 22px}
.hero-badges span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);padding:7px 13px;border-radius:999px;font-size:.78rem;font-weight:600}
.hero .btn-ghost{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.6)}

/* Sections */
main{display:block}
.section{padding:48px 0}
.section.soft{background:var(--bg-soft)}
.section.soft2{background:var(--bg-soft2)}
.section.ink{background:var(--ink);color:#eef2f7}
.eyebrow{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.18em;color:var(--accent-dark);text-transform:uppercase;margin-bottom:12px}
.section.ink .eyebrow{color:#e7d1a3}
.section-title{font-size:1.35rem;line-height:1.5;font-weight:800;margin:0 0 .6em}
.section.ink .section-title{color:#fff}
.section-intro{color:var(--muted);font-size:.98rem;line-height:1.9}
.section.ink .section-intro{color:#cfdae7}
.lead-answer{font-size:1.04rem;line-height:1.85;font-weight:600;background:var(--primary-soft);border-left:5px solid var(--primary);padding:18px 18px;border-radius:0 var(--radius) var(--radius) 0;margin:0 0 24px}

/* Grids — 既定は1列（スマホ） */
.grid,.grid-2,.grid-3,.grid-4{display:grid;grid-template-columns:1fr;gap:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow-sm)}
.card h3{margin:.1em 0 .45em;font-size:1.08rem;line-height:1.55}
.card p{margin:0;line-height:1.85}
.card .num{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:11px;background:var(--primary-soft);color:var(--primary-dark);font-weight:800;margin-bottom:12px}
.card.accent-top{border-top:4px solid var(--accent)}
.card-link{display:block;color:inherit;transition:.18s}
.card-link:hover{text-decoration:none;box-shadow:var(--shadow);transform:translateY(-2px)}
.card .more{display:inline-block;margin-top:12px;color:var(--primary-dark);font-weight:700;font-size:.9rem}

/* 悩みリスト — 1列・番号は文中に */
.problem-list{display:grid;grid-template-columns:1fr;gap:10px;list-style:none;padding:0;margin:0;counter-reset:p}
.problem-list li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;font-weight:600;line-height:1.7}
.problem-list li::before{counter-increment:p;content:"0" counter(p);color:var(--accent-dark);font-weight:800;font-family:var(--font-serif);margin-right:10px}

/* steps */
.steps{display:grid;grid-template-columns:1fr;gap:12px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.step .stepno{font-size:.72rem;font-weight:800;letter-spacing:.1em;color:var(--accent-dark)}
.step h4{margin:.3em 0 .35em;font-size:1.02rem}
.step p{margin:0;color:var(--muted);font-size:.93rem;line-height:1.8}

/* stats — 短い数値は横3つ */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;text-align:center}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 6px}
.section.ink .stat{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14)}
.stat .big{font-family:var(--font-serif);font-size:1.6rem;font-weight:800;color:var(--primary);line-height:1}
.section.ink .stat .big{color:#a9d0f2}
.stat .lbl{color:var(--muted);font-size:.7rem;margin-top:6px;line-height:1.45}
.section.ink .stat .lbl{color:#cfdae7}

/* 3層 */
.layers{display:grid;gap:10px}
.layer{border-radius:var(--radius);padding:16px 18px;color:#fff}
.layer b{font-size:1.02rem}
.layer span{display:block;font-size:.88rem;opacity:.94;margin-top:3px;line-height:1.7}
.layer.macro{background:var(--primary-dark)}.layer.mezo{background:var(--primary)}.layer.micro{background:#3f83c4}

/* quote */
.quote{background:#fff;border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;padding:20px 18px;box-shadow:var(--shadow-sm)}
.quote p{font-size:.98rem;line-height:1.9;margin:0 0 12px}
.quote cite{color:var(--muted);font-style:normal;font-weight:600;font-size:.85rem}

/* CTA */
.cta-band{background:linear-gradient(160deg,#143f72,#1f5c9e);color:#fff;border-radius:var(--radius-lg);padding:32px 20px;text-align:center}
.cta-band h2{font-size:1.3rem;line-height:1.5;margin:0 0 .4em;color:#fff}
.cta-band p{color:#eaf1f9;line-height:1.85;margin:0 0 20px}
.cta-band .btn-row{justify-content:center}
.cta-band .btn-primary{background:#fff;color:var(--primary-dark)}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.6);color:#fff;background:transparent}

/* breadcrumb */
.breadcrumb{padding:14px 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;font-size:.8rem;color:var(--muted)}
.breadcrumb li+li::before{content:"›";margin-right:6px}
.breadcrumb a{color:var(--muted)}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600}

/* page-head / prose */
.page-head{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.page-head .container{padding-top:22px;padding-bottom:28px}
.page-head .kicker{color:var(--accent-dark);font-weight:800;font-size:.76rem;letter-spacing:.12em}
.page-head h1{font-size:1.45rem;line-height:1.5;margin:.2em 0 0;font-weight:800}
.prose{max-width:100%}
.prose h2{font-size:1.24rem;line-height:1.55;margin:1.8em 0 .55em;padding-top:.7em;border-top:1px solid var(--line);font-weight:800}
.prose h2:first-child{border-top:none;margin-top:0;padding-top:0}
.prose h3{font-size:1.08rem;margin:1.4em 0 .45em;color:var(--primary-dark);font-weight:800}
.prose p{margin:0 0 1.2em;line-height:1.9}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.35em}
.prose li{margin:.45em 0;line-height:1.85}
.prose strong{color:var(--primary-dark)}
.callout{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px;margin:1.5em 0}
.callout h3{margin-top:0}
.note{font-size:.88rem;color:var(--muted);line-height:1.8}
.tag{display:inline-block;background:var(--primary-soft);color:var(--primary-dark);font-size:.78rem;font-weight:700;padding:5px 13px;border-radius:999px;margin:0 6px 6px 0}
.section.ink .tag{background:rgba(255,255,255,.14);color:#eaf3ff}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

/* sidebar / split — 既定は縦積み */
.with-aside{display:grid;grid-template-columns:1fr;gap:26px}
.aside .box{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:16px}
.aside h4{margin:0 0 .5em;font-size:1rem}
.aside .box.cta{background:var(--primary);color:#fff}
.aside .box.cta a{color:#fff}
.aside .box.cta .btn{width:100%}
.split{display:grid;grid-template-columns:1fr;gap:22px}

/* tables */
.table-wrap{overflow-x:auto;margin:1.2em 0;-webkit-overflow-scrolling:touch}
table.data{width:100%;border-collapse:collapse;font-size:.9rem;background:#fff;line-height:1.7}
table.data th,table.data td{border:1px solid var(--line);padding:11px 12px;text-align:left;vertical-align:top}
table.data thead th{background:var(--primary);color:#fff}
table.data tbody th{background:var(--bg-soft);width:36%}

/* FAQ */
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin:0 0 12px;box-shadow:var(--shadow-sm);overflow:hidden}
.faq-list summary{cursor:pointer;list-style:none;padding:15px 44px 15px 16px;font-weight:700;font-size:.98rem;line-height:1.6;position:relative}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"＋";position:absolute;right:16px;top:14px;color:var(--primary);font-weight:800}
.faq-list details[open] summary::after{content:"−"}
.faq-list .a{padding:0 16px 16px;color:#2c3a48;line-height:1.85}
.faq-cat{font-size:1.15rem;font-weight:800;margin:1.8em 0 .7em;color:var(--primary-dark)}
.faq-cat:first-child{margin-top:0}

/* case */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;box-shadow:var(--shadow-sm)}
.case .meta{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}
.case .meta span{background:var(--bg-soft);border:1px solid var(--line);font-size:.75rem;padding:4px 10px;border-radius:999px;color:var(--muted)}
.case dl{margin:0}
.case dt{font-weight:800;color:var(--primary-dark);margin-top:12px;font-size:.9rem}
.case dd{margin:.25em 0 0;line-height:1.85}

/* 画像・ギャラリー（写真サイズは従来どおり小さめを維持） */
figure{margin:1.4em 0}
figure img{border-radius:var(--radius);border:1px solid var(--line);width:100%}
figure figcaption{font-size:.82rem;color:var(--muted);margin-top:8px;text-align:center}
.prose>figure img{max-width:340px;margin-left:auto;margin-right:auto}
.split-media img{max-width:320px;margin:0 auto;aspect-ratio:4/3;object-fit:cover}
.split-media.portrait img{max-width:230px;aspect-ratio:3/4;object-fit:cover;margin:0 auto}
.hero-photo img{max-width:240px;margin:0 auto;aspect-ratio:4/3;object-fit:cover}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.gallery figure{margin:0}
.gallery img{aspect-ratio:1/1;object-fit:cover;width:100%;border-radius:var(--radius)}
.gallery figcaption{font-size:.78rem;margin-top:6px}

/* Footer — 既定は縦積み */
.site-footer{background:var(--ink);color:#c3cdd8}
.footer-grid{display:grid;grid-template-columns:1fr;gap:24px;padding:36px 18px 26px}
.footer-name{font-weight:800;color:#fff;font-size:1.05rem;margin:0 0 10px}
.footer-name span{font-weight:500;color:#93a4b4;font-size:.82rem}
.footer-brand p{margin:.3em 0;font-size:.88rem;line-height:1.85}
.footer-nap a,.footer-sns a{color:#e7ecf1}
.footer-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.footer-h{color:#fff;font-weight:800;font-size:.88rem;margin:0 0 10px}
.footer-nav a{display:block;color:#b6c2ce;font-size:.85rem;padding:5px 0}
.footer-nav a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);font-size:.8rem;color:#93a4b4}
.footer-bottom .container{padding-top:18px;padding-bottom:18px}

/* utilities */
.center{text-align:center}
.mt0{margin-top:0}.mb0{margin-bottom:0}.mt24{margin-top:24px}.mt40{margin-top:36px}
.muted{color:var(--muted)}
.hr{height:1px;background:var(--line);border:0;margin:40px 0}

/* =========== タブレット（600px〜） =========== */
@media(min-width:600px){
  body{font-size:16.5px}
  .container{padding:0 24px}
  .grid-2{grid-template-columns:repeat(2,1fr);gap:20px}
  .gallery{grid-template-columns:repeat(3,1fr);gap:14px}
  .footer-nav{grid-template-columns:repeat(4,1fr)}
  .cta-band{padding:40px 32px}
  .lead-answer{padding:22px 24px}
}

/* =========== PC（1000px〜） =========== */
@media(min-width:1000px){
  .section{padding:88px 0}
  .container{padding:0 28px}
  .hero-inner{padding:92px 0 84px}
  .hero h1{font-size:2.9rem;line-height:1.45}
  .hero-lead{font-size:1.1rem;line-height:2;max-width:40em}
  .hero-badges{gap:12px;margin:30px 0 34px}
  .section-title{font-size:2.1rem;line-height:1.5}
  .section-intro{font-size:1.05rem;line-height:2;max-width:44em}
  .lead-answer{font-size:1.15rem;line-height:2;padding:26px 30px;margin-bottom:36px}
  .eyebrow{font-size:.8rem;margin-bottom:16px}
  .grid,.grid-2{gap:26px}
  .grid-3{grid-template-columns:repeat(3,1fr);gap:26px}
  .grid-4{grid-template-columns:repeat(4,1fr);gap:22px}
  .card{padding:32px 30px}
  .card h3{font-size:1.14rem}
  .problem-list{grid-template-columns:repeat(3,1fr);gap:18px}
  .problem-list li{padding:26px}
  .problem-list li::before{display:block;font-size:1.6rem;margin:0 0 8px}
  .steps{grid-template-columns:repeat(4,1fr);gap:18px}
  .stats{gap:22px}
  .stat{padding:32px 18px}
  .stat .big{font-size:2.7rem}
  .stat .lbl{font-size:.9rem;margin-top:10px}
  .layers{gap:14px;max-width:760px}
  .layer{padding:22px 26px}
  .quote{padding:30px 32px}
  .cta-band{padding:56px 44px}
  .cta-band h2{font-size:2rem}
  .prose{max-width:720px}
  .prose h2{font-size:1.5rem;margin:2.6em 0 .7em}
  .prose h3{font-size:1.18rem}
  .prose p{margin-bottom:1.5em;line-height:2}
  .with-aside{grid-template-columns:minmax(0,1fr) 320px;gap:56px}
  .aside .box{position:sticky;top:96px}
  .aside .box+.box{position:static}
  .split{grid-template-columns:1fr 1fr;gap:56px;align-items:center}
  .page-head .container{padding-top:36px;padding-bottom:44px}
  .page-head h1{font-size:2.3rem}
  table.data{font-size:.96rem}
  table.data th,table.data td{padding:14px 16px}
  .faq-list summary{padding:20px 56px 20px 24px;font-size:1.05rem}
  .faq-list .a{padding:0 24px 22px}
  .footer-grid{grid-template-columns:1.1fr 2fr;gap:44px;padding:64px 28px 40px}
  .gallery{grid-template-columns:repeat(4,1fr);gap:16px}
  .hero-badges span{font-size:.86rem;padding:9px 18px}
  .btn{padding:16px 30px;font-size:1rem}
}

/* --- 図解・アイコン（トップ視覚強化） --- */
.ic{width:36px;height:36px;color:var(--primary);fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;margin-bottom:8px;display:block}
.diag-cap{font-size:.92rem;color:var(--muted);line-height:1.85;margin:14px auto 0;text-align:center;max-width:40em}
.reldiag-frame{background:var(--bg-soft2);border:1px solid #cddcef;border-radius:18px;padding:28px 16px 22px;position:relative}
.reldiag-label{position:absolute;top:-12px;left:16px;background:var(--accent);color:#2a2010;font-size:.74rem;font-weight:800;padding:4px 12px;border-radius:999px}
.reldiag-row{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}
.rel-node{background:#fff;border:2px solid var(--primary);border-radius:14px;padding:16px 14px;font-weight:800;text-align:center;min-width:104px}
.rel-node.center{background:var(--primary-dark);color:#fff;border-color:var(--primary-dark)}
.rel-node small{display:block;font-weight:500;font-size:.68rem;margin-top:5px;opacity:.9;line-height:1.4}
.rel-arrow{color:var(--primary);font-size:1.5rem;font-weight:800;line-height:1}
@media(max-width:560px){
  .reldiag-row{flex-direction:column;gap:8px}
  .rel-arrow{transform:rotate(90deg)}
  .rel-node{width:100%;max-width:260px}
}

/* --- 追加①：課題メカニズムの流れ図 --- */
.flow{display:grid;grid-template-columns:1fr;gap:8px}
.flow-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 16px}
.flow-step .fs-no{font-size:.68rem;font-weight:800;letter-spacing:.08em;color:var(--accent-dark);display:block}
.flow-step h3{margin:.2em 0 .3em;font-size:1rem;line-height:1.5}
.flow-step p{margin:0;font-size:.85rem;color:#3a4653;line-height:1.75}
.flow-step.dead{background:#fbeeeb;border-color:#e8ccc4}
.flow-step.dead h3{color:#a5442f}
.flow-step.brand{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff}
.flow-step.brand h3{color:#fff}.flow-step.brand p{color:#dbe7f4}.flow-step.brand .fs-no{color:#ecd8ab}.flow-step.brand .ic{color:#a9d0f2}
.flow-arrow{text-align:center;color:var(--primary);font-size:1.4rem;font-weight:800;transform:rotate(90deg);line-height:1}
.flow-arrow.strong{color:var(--primary-dark)}
@media(min-width:860px){
  .flow{grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:10px;align-items:stretch}
  .flow-arrow{transform:none;display:flex;align-items:center;justify-content:center}
  .flow-step{display:flex;flex-direction:column}
}
/* --- 追加②：連携型ポジション図 --- */
.posdiag{margin:10px auto 0;max-width:540px}
.posdiag svg{width:100%;height:auto;display:block}
.posdiag-note{font-size:.94rem;color:var(--muted);line-height:1.9;margin-top:16px}

/* --- 追加②：ポジション図 スマホは原寸HTML／PCは三角SVG --- */
.posdiag .svg-tri{display:none}
.posdiag-stack{display:block}
.pd-center{background:var(--primary-soft);border:2px solid var(--primary);border-radius:var(--radius);padding:18px 16px;text-align:center}
.pd-center .pd-tag{display:block;font-size:.85rem;font-weight:700;color:var(--primary)}
.pd-center strong{display:block;font-size:1.55rem;font-weight:800;color:var(--primary-dark);line-height:1.3;margin:.12em 0}
.pd-center .pd-sub{display:block;font-size:.9rem;color:#4a6a92;line-height:1.8}
.pd-link{text-align:center;color:var(--accent-dark);font-weight:800;font-size:.9rem;padding:12px 0 10px;position:relative}
.pd-link::before,.pd-link::after{content:"";position:absolute;left:50%;width:0;border-left:2px dashed #c3cdd8;height:9px}
.pd-link::before{top:0}.pd-link::after{bottom:0}
.pd-pros{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.pd-pros li{background:var(--bg-soft);border:1px solid #dcccab;border-radius:var(--radius);padding:13px 16px;display:flex;justify-content:space-between;align-items:center;gap:10px}
.pd-pros li b{font-size:1.02rem;color:#5a5140;white-space:nowrap}
.pd-pros li span{font-size:.86rem;color:#8a8272;text-align:right;line-height:1.5}
@media(min-width:520px){
  .posdiag .svg-tri{display:block}
  .posdiag-stack{display:none}
}

/* 追加②修正：スマホも図のまま（縦長SVG）。テキストカード列は廃止 */
.posdiag .svg-tri-m{display:block;max-width:360px;margin:0 auto}
@media(min-width:520px){ .posdiag .svg-tri-m{display:none} }