:root{
  --cream:#f7f4ec;
  --paper:#fffdf8;
  --navy:#1c2743;
  --blue:#1f3f8f;
  --blue-bright:#0b66c3;
  --gold:#a8842c;
  --gold-light:#d9b45c;
  --coral:#d97862;
  --ink:#111827;
  --soft:#5c667a;
  --line:#ddd5c2;
  --pale:#f1ecdf;
  --success:#236b55;
  --shadow:0 18px 50px rgba(28,39,67,.09);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--cream);color:var(--ink);font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN",system-ui,sans-serif;font-size:16px;line-height:1.95}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-underline-offset:.2em}
button,input,textarea{font:inherit}
:focus-visible{outline:3px solid var(--gold-light);outline-offset:3px}
.skip-link{position:fixed;left:12px;top:-80px;z-index:100;background:#fff;color:var(--navy);padding:10px 16px;border:2px solid var(--navy);font-weight:900}
.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:40;background:rgba(247,244,236,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.site-header__in{width:min(1240px,94vw);min-height:64px;margin:auto;display:flex;align-items:center;gap:26px}
.site-brand{display:flex;flex-direction:column;text-decoration:none;line-height:1.15}
.site-brand b{font-size:17px;font-weight:900;letter-spacing:.08em;color:var(--navy)}
.site-brand small{font:700 9px Inter,sans-serif;letter-spacing:.3em;color:var(--soft)}
.site-nav{margin-left:auto;display:flex;align-items:center;gap:24px;font-size:13px;font-weight:800}
.site-nav a{text-decoration:none}
.site-nav__cta{padding:9px 18px;border-radius:999px;background:var(--navy);color:var(--cream)}
.breadcrumb{width:min(1180px,92vw);margin:auto;padding:14px 0;font-size:12px;color:var(--soft)}
.breadcrumb a{text-decoration:none;color:var(--blue)}
.article-hero{position:relative;overflow:hidden;border-block:1px solid var(--line);background:var(--cream)}
.article-hero__in{width:min(1180px,92vw);margin:auto;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(340px,.92fr);align-items:center;gap:clamp(32px,5vw,72px);padding:clamp(52px,8vw,98px) 0}
.article-hero__eyebrow{margin:0;font:800 11px/1.3 Inter,sans-serif;letter-spacing:.28em;color:var(--gold)}
.article-hero h1{margin:18px 0 20px;font:900 clamp(32px,4.4vw,54px)/1.38 "Zen Old Mincho","Yu Mincho",serif;letter-spacing:.01em;color:var(--navy);text-wrap:balance;overflow-wrap:anywhere}
.article-hero__lead{max-width:720px;margin:0;color:var(--soft);font-size:clamp(15px,1.6vw,18px)}
.byline{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin-top:24px;color:var(--soft);font-size:12px}
.byline strong{color:var(--navy)}
.byline a{color:var(--blue);font-weight:800}
.byline__badge{display:inline-flex;align-items:center;gap:7px;padding:5px 10px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.7)}
.article-hero__media{position:relative;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff;overflow:hidden}
.article-hero__media::after{content:"";position:absolute;inset:0;border:10px solid rgba(247,244,236,.72);pointer-events:none}
.article-hero__media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.article-shell{width:min(1180px,92vw);margin:auto;display:grid;grid-template-columns:minmax(0,800px) 270px;gap:clamp(38px,6vw,76px);padding:clamp(48px,7vw,86px) 0 110px;align-items:start}
.article-main{min-width:0;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow);padding:clamp(26px,5vw,64px)}
.answer-box{position:relative;margin:0 0 34px;padding:26px 28px 26px 34px;background:#f3eddf;border-left:5px solid var(--gold);font-size:clamp(17px,2vw,20px);font-weight:800;color:var(--navy)}
.answer-box::before{content:"結論";display:block;margin-bottom:7px;font:900 10px Inter,sans-serif;letter-spacing:.25em;color:var(--gold)}
.who-box{margin:28px 0;padding:22px 25px;border:1px solid var(--line);background:#fff}
.who-box h2{margin:0 0 10px!important;font:900 16px/1.5 "Noto Sans JP",sans-serif!important;color:var(--navy)!important}
.who-box h2::before{display:none!important}
.who-box ul{margin:0;padding-left:1.3em;display:grid;gap:6px}
.reference-case{position:relative;margin:34px 0;padding:27px 28px 25px;border:1px solid #d7c9a8;border-left:5px solid var(--gold);background:linear-gradient(135deg,#fffdf8,#f5efe1)}
.reference-case__label{margin:0 0 8px!important;color:var(--gold)!important;font:900 10px/1.4 Inter,sans-serif!important;letter-spacing:.22em}
.reference-case h2{margin:0!important;font:900 clamp(18px,2vw,22px)/1.55 "Zen Old Mincho",serif!important}
.reference-case p{margin:13px 0 0}
.reference-case__source,.reference-case__note{font-size:11px;line-height:1.75;color:var(--soft)}
.reference-case__source a{color:var(--blue);font-weight:800}
.reference-case__note{padding-top:11px;border-top:1px solid var(--line)}
@media(max-width:620px){.reference-case{padding:22px 20px}}
.key-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:32px 0}
.key-point{padding:18px;background:var(--navy);color:#fff;min-height:150px}
.key-point b{display:block;color:var(--gold-light);font:900 10px Inter,sans-serif;letter-spacing:.15em}
.key-point span{display:block;margin-top:12px;font-weight:800;font-size:14px;line-height:1.7}
.toc-inline{margin:38px 0 46px;border:1px solid var(--line);border-top:4px solid var(--gold);background:#fbf8f0;padding:0 25px}
.toc-inline summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:900;color:var(--navy)}
.toc-inline summary::-webkit-details-marker{display:none}
.toc-inline summary::after{content:"＋";float:right;color:var(--gold)}
.toc-inline details[open] summary::after{content:"−"}
.toc-inline ol{margin:0;padding:0 0 22px 1.4em;columns:2;column-gap:34px}
.toc-inline li{break-inside:avoid;margin:0 0 9px;font-size:13px;line-height:1.65}
.toc-inline a{text-decoration:none;color:#33415f}
@media(min-width:981px){.toc-inline{display:none}}
.article-main section[id]{scroll-margin-top:88px}
.article-main h2{margin:76px 0 20px;font:900 clamp(27px,4vw,38px)/1.5 "Zen Old Mincho","Yu Mincho",serif;color:var(--navy);text-wrap:pretty}
.article-main h2::before{content:"";display:block;width:52px;height:4px;background:var(--gold-light);margin-bottom:18px}
.article-main h3{margin:38px 0 14px;font-size:20px;line-height:1.6;color:var(--navy)}
.article-main p{margin:0 0 22px}
.article-main strong{font-weight:900;color:var(--navy)}
.article-main ul,.article-main ol{padding-left:1.45em}
.article-main li{margin:.55em 0}
.article-main a.citation{display:inline-block;margin-inline:.08em;color:var(--blue);font:800 .72em Inter,sans-serif;vertical-align:super;text-decoration:none}
.article-main blockquote:not(.insight-quote){margin:34px 0;padding:24px 28px;border-left:4px solid var(--gold);background:#f4efe4;color:var(--navy)}
.article-main blockquote:not(.insight-quote) p:last-child{margin-bottom:0}
.table-wrap{width:100%;margin:32px 0;overflow-x:auto;-webkit-overflow-scrolling:touch}
.table-wrap table{width:100%;min-width:620px;border-collapse:collapse;font-size:14px}
.table-wrap caption{text-align:left;margin-bottom:12px;font-weight:900;color:var(--navy)}
.table-wrap th,.table-wrap td{padding:14px 15px;border:1px solid var(--line);vertical-align:top;text-align:left}
.table-wrap thead th{background:var(--navy);color:#fff}
.table-wrap tbody th{background:#eee7d8;color:var(--navy)}
.definition{margin:30px 0;padding:24px 26px;border:1px solid var(--gold-light);background:#fffaf0}
.definition dt{font-weight:900;color:var(--navy)}
.definition dd{margin:8px 0 0;color:#424c60}
.evidence-callout{margin:34px 0;padding:26px;background:#edf1f8;border-left:5px solid var(--blue)}
.evidence-callout b{display:block;margin-bottom:8px;font-size:12px;letter-spacing:.06em;color:var(--blue)}
.evidence-callout p:last-child{margin-bottom:0}
.caution{margin:34px 0;padding:24px 26px;background:#fff4ee;border:1px solid #e6b6aa}
.caution b{display:block;color:#9c4937;margin-bottom:8px}
.insight-quote{margin:42px 0;padding:34px clamp(24px,4vw,42px);border-block:1px solid var(--gold-light);text-align:center;color:var(--navy);font:900 clamp(20px,3vw,28px)/1.9 "Zen Old Mincho",serif}
.insight-quote cite{display:block;margin-top:12px;font:500 11px/1.7 "Noto Sans JP",sans-serif;color:var(--soft)}
.visual{margin:42px 0;border:1px solid var(--line);background:#f7f3e9;padding:clamp(22px,4vw,36px)}
.visual figcaption{margin-bottom:22px;font-weight:900;color:var(--navy)}
.visual__steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.visual__step{position:relative;min-width:0;min-height:132px;padding:20px 18px;border:1px solid var(--line);background:var(--paper);overflow-wrap:anywhere}
.visual__step:last-child:nth-child(odd){grid-column:1/-1}
.visual__step b{display:block;font:900 24px Inter,sans-serif;color:rgba(168,132,44,.45)}
.visual__step strong{display:block;margin:8px 0 5px;font-size:15px}
.visual__step span{font-size:12px;color:var(--soft)}
.visual__step:not(:last-child)::after{display:none}
.evidence-panel{margin:44px 0;padding:clamp(24px,4vw,36px);border:1px solid var(--line);background:#fff}
.evidence-panel__label{color:var(--gold);font:900 10px Inter,sans-serif;letter-spacing:.2em}
.evidence-panel h2{margin:8px 0 10px!important;font-size:clamp(23px,3vw,30px)!important}
.evidence-panel h2::before{display:none!important}
.evidence-panel>p{color:var(--soft);font-size:13px}
.evidence-panel__grid{display:grid;grid-template-columns:1fr;gap:10px;margin-top:22px}
.evidence-panel__grid a{display:grid;grid-template-columns:48px minmax(0,1fr);gap:3px 14px;min-height:0;padding:18px;border:1px solid var(--line);background:#f8f5ed;text-decoration:none}
.evidence-panel__grid b{color:rgba(168,132,44,.48);font:900 24px Inter,sans-serif}
.evidence-panel__grid strong{display:block;margin:7px 0;color:var(--navy);font-size:13px}
.evidence-panel__grid span{color:var(--soft);font-size:13px;line-height:1.8}
.evidence-panel__grid b{grid-row:1/4}
.evidence-panel__grid em{padding-top:8px;color:var(--blue);font-size:12px;font-style:normal;font-weight:900}
.data-figure{margin:42px 0;border:1px solid var(--line);background:#fff;padding:clamp(22px,4vw,34px)}
.data-figure figcaption{margin-bottom:24px;font-weight:900;color:var(--navy)}
.data-bars{display:grid;gap:18px}
.data-bar{display:grid;grid-template-columns:minmax(120px,1fr) 2.5fr;gap:14px;align-items:center}
.data-bar__label{font-size:13px;font-weight:800;color:var(--navy)}
.data-bar__track{height:28px;background:#ece7db;position:relative;overflow:hidden}
.data-bar__fill{height:100%;min-width:10%;background:linear-gradient(90deg,var(--blue),var(--gold-light));display:flex;justify-content:flex-end;align-items:center;padding-right:9px;color:#fff;font:800 11px Inter,sans-serif}
.data-figure__note{margin:18px 0 0!important;font-size:12px;line-height:1.8;color:var(--soft)}
.compare-table{width:100%;border-collapse:collapse;margin:32px 0;font-size:14px}
.compare-table caption{text-align:left;margin-bottom:12px;font-weight:900;color:var(--navy)}
.compare-table th,.compare-table td{padding:14px 15px;border:1px solid var(--line);vertical-align:top;text-align:left}
.compare-table th{background:var(--navy);color:#fff}
.compare-table tbody th{background:#eee7d8;color:var(--navy)}
.case{margin:38px 0;border:1px solid var(--line);background:#fff}
.case__head{padding:14px 20px;background:var(--navy);color:#fff;font-weight:900}
.case__body{padding:24px}
.case__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.case__grid div{padding:15px;background:#f5f1e8;font-size:13px}
.case__grid b{display:block;color:var(--gold);margin-bottom:5px}
.workbook{margin:48px 0;padding:clamp(26px,5vw,42px);background:var(--navy);color:#fff;box-shadow:0 16px 36px rgba(28,39,67,.18)}
.workbook__label{font:900 10px Inter,sans-serif;letter-spacing:.22em;color:var(--gold-light)}
.workbook h2{color:#fff!important;margin:10px 0 14px!important}
.workbook h2::before{display:none!important}
.workbook p{color:rgba(255,255,255,.82)}
.workbook ol{margin:22px 0;background:rgba(255,255,255,.06);padding:18px 18px 18px 3em}
.workbook li{padding-left:5px}
.workbook__template{padding:18px;background:#fff;color:var(--navy);white-space:pre-wrap;line-height:1.8;font-weight:700}
.action-list{counter-reset:actions;list-style:none!important;padding:0!important;display:grid;gap:14px}
.action-list li{counter-increment:actions;position:relative;padding:17px 18px 17px 58px;border:1px solid var(--line);background:#fff;margin:0}
.action-list li::before{content:counter(actions);position:absolute;left:16px;top:15px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--gold);color:#fff;font:900 12px Inter,sans-serif}
.mid-cta{margin:54px 0;padding:30px;background:#f2ecdf;border:1px solid var(--gold-light)}
.mid-cta h2{margin:0 0 12px!important;font:900 24px/1.5 "Zen Old Mincho",serif!important}
.mid-cta h2::before{display:none!important}
.mid-cta__buttons{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:13px 22px;border-radius:999px;text-decoration:none;font-weight:900;text-align:center}
.button--primary{background:var(--navy);color:#fff}
.button--gold{background:var(--gold-light);color:var(--navy)}
.button--ghost{border:1px solid var(--navy);color:var(--navy);background:transparent}
.decision-cta{margin:56px 0;display:grid;grid-template-columns:1.1fr .9fr;border:1px solid var(--line);background:#fff}
.decision-cta__main,.decision-cta__sub{padding:clamp(24px,4vw,38px)}
.decision-cta__main{background:var(--navy);color:#fff}
.decision-cta__main h2{color:#fff!important;margin:0 0 12px!important;font-size:29px!important}
.decision-cta__main h2::before,.decision-cta__sub h2::before{display:none!important}
.decision-cta__main p{color:rgba(255,255,255,.78)}
.decision-cta__sub h2{margin:0 0 12px!important;font-size:22px!important}
.decision-cta__sub p{font-size:13px;color:var(--soft)}
.decision-cta small{display:block;margin-top:12px;font-size:12px;line-height:1.8;opacity:.88}
.sources{margin:72px 0 0;padding-top:32px;border-top:1px solid var(--line)}
.sources h2{font-size:27px!important}
.sources ol{font-size:12px;color:#465064}
.sources li{margin:12px 0}
.sources li[id]{scroll-margin-top:88px}
.sources a{color:var(--blue);font-weight:800;word-break:break-word}
.sources__policy{font-size:12px;line-height:1.85;color:var(--soft)}
.author-card{display:grid;grid-template-columns:70px 1fr;gap:20px;margin:56px 0 0;padding:26px;border:1px solid var(--line);background:#fff}
.author-card__mark{width:70px;height:70px;display:grid;place-items:center;background:var(--navy);color:var(--gold-light);font:900 26px "Zen Old Mincho",serif}
.author-card h2{margin:0 0 6px!important;font:900 19px/1.5 "Noto Sans JP",sans-serif!important}
.author-card h2::before{display:none!important}
.author-card p{margin:0 0 7px;font-size:12px;color:var(--soft)}
.author-card a{color:var(--blue);font-weight:800}
.faq{margin-top:70px}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-weight:900;color:var(--navy)}
.faq details p{padding-top:12px;margin:0}
.related{margin-top:70px}
.related__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.related-card{display:flex;flex-direction:column;min-height:190px;padding:22px;background:var(--navy);color:#fff;text-decoration:none}
.related-card span{font:800 9px Inter,sans-serif;letter-spacing:.15em;color:var(--gold-light)}
.related-card strong{margin:16px 0;color:#fff;line-height:1.6}
.related-card em{margin-top:auto;color:var(--gold-light);font-style:normal;font-weight:900}
.article-side{position:static}
.side-toc{position:static;max-height:none;overflow:visible}
.side-card{border:1px solid var(--line);background:var(--paper);padding:22px;margin-bottom:18px}
.side-card__label{font:900 10px Inter,sans-serif;letter-spacing:.18em;color:var(--gold)}
.side-card h2{margin:8px 0 12px;font-size:17px;line-height:1.5;color:var(--navy)}
.side-card p{font-size:12px;color:var(--soft)}
.side-toc ol{padding-left:1.3em;margin-bottom:0;font-size:12px;line-height:1.65}
.side-toc li{margin:7px 0}
.side-toc a{text-decoration:none;color:#43506a}
.side-card .button{width:100%;font-size:13px}
.side-progress{height:4px;background:#e8e1d2;margin-top:16px;overflow:hidden}
.side-progress span{display:block;width:0;height:100%;background:var(--gold)}
.reading-progress{position:fixed;top:0;left:0;z-index:60;width:0;height:4px;background:linear-gradient(90deg,var(--blue),var(--gold-light));pointer-events:none}
.site-footer{background:var(--navy);color:rgba(247,244,236,.72);padding:40px 0;font-size:11px}
.site-footer__in{width:min(1180px,92vw);margin:auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px}
.site-footer nav{display:flex;flex-wrap:wrap;gap:18px}
.site-footer a{color:#fff;text-decoration:none}
.disclosure{margin-top:16px;font-size:12px;line-height:1.85}
@media(max-width:1180px){
  .article-shell{grid-template-columns:1fr;gap:28px}
  .article-side{position:static;display:grid;grid-template-columns:1fr 1fr;gap:14px}
  .side-toc{display:none}
  .toc-inline{display:block}
}
@media(max-width:980px){
  .article-hero__in{grid-template-columns:1fr;padding-bottom:0}
  .article-hero__media{width:100%;margin-left:0}
  .article-hero__media::after{border-width:6px}
  .side-toc{position:static;max-height:none;overflow:visible}
}
@media(max-width:720px){
  body{font-size:15px;line-height:1.9}
  .site-nav a:not(.site-nav__cta){display:none}
  .article-hero__in{padding-top:45px}
  .article-hero h1{font-size:clamp(30px,8.3vw,42px)}
  .article-main{width:auto;margin-left:0;padding:30px max(20px,5vw)}
  .article-main h2{margin-top:56px;font-size:clamp(23px,6.5vw,27px);line-height:1.45;overflow-wrap:anywhere}
  .key-points{grid-template-columns:1fr}
  .key-point{min-height:0}
  .toc-inline ol{columns:1}
  .visual__steps{grid-template-columns:1fr}
  .visual__step{min-height:0}
  .visual__step:last-child:nth-child(odd){grid-column:auto}
  .visual__step:not(:last-child)::after{display:none}
  .evidence-panel__grid{grid-template-columns:1fr}
  .evidence-panel__grid a{min-height:0}
  .data-bar{grid-template-columns:1fr;gap:5px}
  .compare-table{display:block;overflow-x:auto;white-space:normal}
  .case__grid{grid-template-columns:1fr}
  .decision-cta{grid-template-columns:1fr}
  .related__grid{grid-template-columns:1fr}
  .author-card{grid-template-columns:50px 1fr;padding:20px}
  .author-card__mark{width:50px;height:50px;font-size:20px}
  .article-side{grid-template-columns:1fr}
  .mid-cta__buttons{display:grid}
  .button{width:100%}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{
  .site-header,.article-side,.reading-progress,.mid-cta,.decision-cta,.related,.site-footer,.skip-link{display:none!important}
  body{background:#fff;color:#000;font-size:11pt}
  .article-hero__in,.article-shell{width:100%;display:block;padding:20px 0}
  .article-hero__media{display:none}
  .article-main{box-shadow:none;border:0;padding:0}
  a{color:#000;text-decoration:none}
}