*{box-sizing:border-box;min-width:0}
:root{--ink:#161616;--muted:#6a6a66;--line:#d8d8d2;--paper:#f7f7f3;--green:#0f765b;--max:1240px;--content:860px}
html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:system-ui,-apple-system,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;line-height:1.75;letter-spacing:.005em;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.shell{width:min(var(--max),calc(100% - 64px));margin:auto}
.site-header{border-bottom:1px solid var(--line);background:#fff}.header-inner{height:68px;display:flex;align-items:center}.logo{font-size:28px;font-weight:800;letter-spacing:-.035em}.logo-dot{color:var(--green)}.header-nav{margin-left:auto;display:flex;gap:30px;font-size:13px}.header-nav a{padding:23px 0 20px;border-bottom:2px solid transparent}.header-nav a:hover{border-color:var(--ink)}.menu-label{display:none;margin-left:auto;font-size:13px}
.hero{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.55fr);gap:64px;padding:84px 0 72px}.hero h1{margin:0;font-size:clamp(54px,6.6vw,88px);line-height:1.12;letter-spacing:-.055em;font-weight:750}.hero-side{align-self:end;padding-bottom:9px}.hero-side p{margin:0 0 24px;font-size:16px;line-height:1.95;max-width:390px}.hero-side small{display:block;color:var(--muted);font-size:12px;line-height:1.8;max-width:390px}
.topic-nav{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);display:flex;gap:28px;overflow-x:auto}.topic-nav a{white-space:nowrap;padding:14px 0;font-size:13px;color:#333}.topic-nav a:hover{color:var(--green)}
.section{border-bottom:1px solid var(--line);padding:64px 0}.section-grid{display:grid;grid-template-columns:210px minmax(0,1fr);gap:54px}.section-label h2{margin:0;font-size:15px;line-height:1.5}.section-label p{margin:12px 0 0;color:var(--muted);font-size:12px;line-height:1.8}.section-body{min-width:0}
.lead-story{border-top:1px solid var(--ink);padding-top:26px}.story-kicker{font-size:12px;color:var(--muted);margin-bottom:12px}.lead-story h3{font-size:clamp(36px,4.3vw,58px);line-height:1.28;letter-spacing:-.04em;margin:0 0 18px;max-width:820px}.lead-story .summary{font-size:15px;max-width:680px;color:#444;margin:0 0 24px}.decision{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:16px 0;font-size:17px;font-weight:700;max-width:760px}.more-link{display:inline-block;margin-top:20px;font-size:13px;font-weight:700}.more-link:after{content:"  →";color:var(--green)}
.substories{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:42px}.substory{border-top:1px solid var(--line);padding-top:16px}.substory .meta{font-size:11px;color:var(--muted);margin-bottom:8px}.substory h4{font-size:21px;line-height:1.45;letter-spacing:-.02em;margin:0 0 8px}.substory p{margin:0;color:#555;font-size:13px;line-height:1.75}
.article-list{border-top:1px solid var(--ink)}.article-row{display:grid;grid-template-columns:120px minmax(0,1.1fr) minmax(220px,.7fr) 22px;gap:24px;padding:22px 0;border-bottom:1px solid var(--line);align-items:start}.article-row .cat{font-size:11px;color:var(--muted);padding-top:4px}.article-row .title{font-size:18px;font-weight:700;line-height:1.55}.article-row .hint{font-size:13px;color:#555;line-height:1.75}.article-row .arr{color:var(--green);font-size:17px}.article-row:hover .title{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
.split-columns{display:grid;grid-template-columns:1fr 1fr;gap:54px}.list-block h3{font-size:14px;margin:0 0 16px}.compact-list{border-top:1px solid var(--ink)}.compact-item{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:15px 0;border-bottom:1px solid var(--line)}.compact-item .num,.compact-item time{font-size:11px;color:var(--muted);padding-top:3px}.compact-item strong{display:block;font-size:15px;line-height:1.55}.compact-item small{display:block;font-size:11px;color:var(--muted);margin-top:3px}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.category-item{padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:116px}.category-item b{display:block;font-size:21px;margin-bottom:8px}.category-item span{font-size:12px;color:var(--muted)}.category-item:hover b{color:var(--green)}
.about-strip{background:var(--paper)}.about-inner{display:grid;grid-template-columns:210px 1fr;gap:54px;padding:60px 0}.about-inner h2{margin:0;font-size:15px}.about-copy{display:grid;grid-template-columns:1fr 1fr;gap:56px}.about-copy strong{font-size:32px;line-height:1.45;letter-spacing:-.03em}.about-copy p{font-size:14px;color:#444;margin:3px 0 0}
.footer{border-top:1px solid var(--ink);padding:36px 0 44px}.footer-inner{display:flex;gap:40px;align-items:flex-start}.footer-logo{font-size:27px;font-weight:800;letter-spacing:-.03em}.footer-copy{font-size:11px;color:var(--muted);margin-top:4px}.footer-nav{margin-left:auto;display:flex;gap:20px;flex-wrap:wrap;font-size:11px;color:#555}
.page-intro{display:grid;grid-template-columns:210px 1fr;gap:54px;padding:62px 0 42px;border-bottom:1px solid var(--ink)}.page-intro h1{font-size:15px;margin:6px 0 0}.page-intro .page-title{font-size:clamp(42px,5.8vw,72px);line-height:1.15;letter-spacing:-.05em;margin:0 0 18px;font-weight:750}.page-intro p{max-width:650px;margin:0;color:#555}.article-index{padding:38px 0 72px}
.about-body{width:min(var(--content),calc(100% - 64px));margin:auto;padding:58px 0 84px}.about-body h2{font-size:31px;line-height:1.45;letter-spacing:-.025em;margin:54px 0 16px}.about-body h2:first-child{margin-top:0}.about-body p{font-size:16px;color:#444;line-height:1.95}.about-rule{padding:18px 0;border-top:1px solid var(--line)}.about-rule:last-of-type{border-bottom:1px solid var(--line)}
.article-shell{width:min(var(--content),calc(100% - 64px));margin:auto;padding:34px 0 84px}.crumb,.article-meta{font-size:11px;color:var(--muted)}.crumb{margin-bottom:30px}.article-meta{margin-bottom:14px}.article-shell h1{font-size:clamp(40px,5.3vw,64px);line-height:1.27;letter-spacing:-.045em;margin:0 0 22px;font-weight:750}.article-lead{font-size:17px;line-height:1.95;color:#444;margin:0 0 36px}.article-answer{border-top:2px solid var(--ink);border-bottom:1px solid var(--ink);display:grid;grid-template-columns:130px 1fr;gap:24px;padding:19px 0 22px;margin:38px 0}.article-answer b{font-size:12px}.article-answer strong{font-size:21px;line-height:1.6}.article-shell h2{font-size:29px;line-height:1.5;letter-spacing:-.025em;margin:58px 0 18px;padding-top:16px;border-top:1px solid var(--ink)}.article-shell h3{font-size:21px;margin:32px 0 10px}.article-shell p{font-size:16px;line-height:1.95;color:#444}.table-wrap{overflow-x:auto;margin:24px 0}.compare-table{width:100%;min-width:650px;border-collapse:collapse;font-size:14px}.compare-table th,.compare-table td{padding:13px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.compare-table thead th{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.service-block{display:grid;grid-template-columns:170px 1fr;gap:30px;padding:28px 0;border-top:1px solid var(--line)}.service-block:last-of-type{border-bottom:1px solid var(--line)}.service-block h3{margin:0;font-size:24px}.service-block p{margin-top:0}.service-points{font-size:13px}.notice{margin:18px 0;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:12px;color:#555}.cta{display:inline-block;margin-top:6px;font-weight:700;font-size:14px;border-bottom:2px solid var(--green);padding:7px 0}

/* v4.1: top-page hierarchy refinement */
h1,h2,h3,h4{font-kerning:normal;font-feature-settings:"palt" 1;text-wrap:balance}
.hero.hero-v41{display:block;padding:66px 0 58px}
.hero-v41 .hero-copy{max-width:920px}
.hero-v41 h1{font-size:clamp(46px,5.6vw,72px);line-height:1.16;letter-spacing:-.045em;max-width:900px;margin:0 0 20px;font-weight:750}
.hero-v41 p{font-size:17px;line-height:1.85;color:#444;max-width:650px;margin:0}
.current-decisions{background:var(--paper);border-top:1px solid var(--line)}
.current-label h2{font-size:17px}
.lead-story-v41{border-top:0;padding-top:0}
.lead-story-v41 h3{font-size:clamp(34px,4vw,52px);line-height:1.3;letter-spacing:-.035em;max-width:760px;margin-bottom:14px}
.lead-story-v41 .summary{font-size:14px;line-height:1.8;max-width:600px;margin-bottom:18px}
.lead-story-v41 .decision{border-top:1px solid #a9a9a3;border-bottom:0;padding:16px 0 0;max-width:720px;font-size:17px;line-height:1.65}
.substories-v41{border-top:1px solid var(--line);padding-top:24px;margin-top:34px}
.substories-v41 .substory{border-top:0;padding-top:0}
.substories-v41 .substory h4{font-size:20px;line-height:1.5;max-width:420px}
.substories-v41 .substory p{max-width:420px}

@media(max-width:900px){.shell{width:min(var(--max),calc(100% - 36px))}.header-nav{display:none}.menu-label{display:block}.hero{grid-template-columns:1fr;gap:28px;padding:54px 0 46px}.hero-side{max-width:560px}.section-grid,.about-inner,.page-intro{grid-template-columns:150px 1fr;gap:30px}.article-row{grid-template-columns:90px 1fr 22px}.article-row .hint{display:none}.split-columns{gap:34px}.about-copy{grid-template-columns:1fr;gap:20px}.article-shell,.about-body{width:min(var(--content),calc(100% - 36px))}.hero.hero-v41{padding:52px 0 46px}.hero-v41 h1{font-size:50px;max-width:760px}}
@media(max-width:620px){.shell{width:calc(100% - 28px)}.header-inner{height:60px}.logo{font-size:25px}.hero{padding:38px 0 34px}.hero h1{font-size:46px;line-height:1.14}.hero-side p{font-size:15px}.topic-nav{gap:20px}.topic-nav a{font-size:12px;padding:12px 0}.section{padding:44px 0}.section-grid,.about-inner,.page-intro{grid-template-columns:1fr;gap:18px}.section-label p{display:none}.lead-story h3{font-size:32px}.lead-story .summary{font-size:14px}.decision{font-size:15px}.substories{grid-template-columns:1fr;gap:24px;margin-top:32px}.article-row{grid-template-columns:1fr 18px;gap:10px}.article-row .cat{grid-column:1/2}.article-row .title{font-size:16px}.article-row .arr{grid-column:2;grid-row:1/3}.split-columns{grid-template-columns:1fr;gap:40px}.category-grid{grid-template-columns:1fr}.category-item{min-height:auto;padding:18px 0;border-left:0;border-right:0}.category-grid{border-left:0}.about-inner{padding:42px 0}.about-copy strong{font-size:27px}.footer-inner{flex-direction:column}.footer-nav{margin-left:0}.page-intro{padding:40px 0 28px}.page-intro h1{margin:0}.page-intro .page-title{font-size:45px}.article-index{padding:28px 0 58px}.article-shell,.about-body{width:calc(100% - 28px)}.article-shell h1{font-size:38px}.article-answer{grid-template-columns:1fr;gap:7px}.article-answer strong{font-size:19px}.article-shell h2{font-size:25px}.service-block{grid-template-columns:1fr;gap:8px}.service-block h3{font-size:22px}.hero.hero-v41{padding:36px 0 32px}.hero-v41 h1{font-size:clamp(36px,10.6vw,40px);line-height:1.2;letter-spacing:-.035em;margin-bottom:16px}.hero-v41 p{font-size:15px;line-height:1.8;max-width:520px}.current-decisions{padding-top:40px;padding-bottom:42px}.current-label h2{font-size:16px}.lead-story-v41 h3{font-size:31px;line-height:1.34;letter-spacing:-.03em}.lead-story-v41 .summary{font-size:13px;margin-bottom:16px}.lead-story-v41 .decision{font-size:15px;line-height:1.7}.substories-v41{padding-top:22px;margin-top:30px}.substories-v41 .substory h4{font-size:19px}}