:root{color-scheme:light dark;--color-bg:#f4f7f8;--color-surface:#fff;--color-surface-soft:#eaf1f3;--color-text:#10252c;--color-heading:#071a21;--color-muted:#536a72;--color-accent:#007f86;--color-accent-strong:#00676d;--color-on-accent:#f7ffff;--color-border:#cad8dc;--color-notice-bg:#fff7df;--color-notice-border:#d9b857;--shadow-tint:12 49 59;--font-display:"BIZ UDPGothic", "Yu Gothic UI", "Hiragino Sans", sans-serif;--font-body:"Yu Gothic UI", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;--font-utility:"Bahnschrift", "Arial Narrow", sans-serif;--radius:16px;--content-wide:1180px;--content-reading:760px}@media (prefers-color-scheme:dark){:root{--color-bg:#09161b;--color-surface:#102329;--color-surface-soft:#153038;--color-text:#dcebed;--color-heading:#f1fbfc;--color-muted:#9bb2b8;--color-accent:#58c5c8;--color-accent-strong:#83dadd;--color-on-accent:#062328;--color-border:#29434a;--color-notice-bg:#302b18;--color-notice-border:#806b2f;--shadow-tint:0 0 0}}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);word-break:auto-phrase;overflow-wrap:anywhere;margin:0;font-size:16px;line-height:1.8}body:before{z-index:-1;background-image:radial-gradient(circle at 12% 8%, color-mix(in srgb, var(--color-accent) 10%, transparent), transparent 28%);content:"";pointer-events:none;position:fixed;inset:0}a{color:var(--color-accent-strong);text-underline-offset:.2em}a:focus-visible{outline:3px solid var(--color-accent);outline-offset:4px;border-radius:4px}img{max-width:100%;display:block}.skip-link{z-index:10;background:var(--color-heading);color:var(--color-bg);border-radius:8px;padding:.65rem 1rem;position:fixed;top:.75rem;left:.75rem;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.site-header{z-index:5;border-bottom:1px solid color-mix(in srgb, var(--color-border) 75%, transparent);background:color-mix(in srgb, var(--color-bg) 88%, transparent);backdrop-filter:blur(18px)saturate(130%);position:sticky;top:0}.header-inner,.footer-inner{width:min(calc(100% - 2rem), var(--content-wide));margin:0 auto}.header-inner{justify-content:space-between;align-items:center;gap:2rem;min-height:72px;display:flex}.site-title,.footer-title{color:var(--color-heading);font-family:var(--font-display);letter-spacing:-.035em;font-weight:800;text-decoration:none}.site-title{white-space:nowrap;align-items:center;gap:.7rem;font-size:1.08rem;display:inline-flex}.site-mark{aspect-ratio:1;border:2px solid var(--color-heading);border-radius:9px;flex:none;width:30px;position:relative}.site-mark:before,.site-mark:after,.site-mark span{background:var(--color-accent);content:"";position:absolute}.site-mark:before{inset:5px 13px 5px 5px}.site-mark:after{inset:5px 5px 13px 13px}.site-mark span{width:8px;height:8px;bottom:5px;right:5px}.site-header nav,.site-footer nav{align-items:center;gap:clamp(.85rem,2vw,1.75rem);display:flex}.site-header nav a{color:var(--color-muted);white-space:nowrap;padding:.45rem 0;font-size:.88rem;font-weight:700;text-decoration:none;position:relative}.site-header nav a:after{background:var(--color-accent);content:"";transform-origin:100%;height:2px;transition:transform .18s;position:absolute;bottom:0;left:0;right:0;transform:scaleX(0)}.site-header nav a:hover,.site-header nav a[aria-current=page]{color:var(--color-heading)}.site-header nav a:hover:after,.site-header nav a[aria-current=page]:after{transform-origin:0;transform:scaleX(1)}main{min-height:60dvh}.hero{width:min(calc(100% - 2rem), var(--content-wide));grid-template-columns:minmax(0,.92fr) minmax(420px,1.08fr);align-items:center;gap:clamp(2rem,6vw,5rem);min-height:min(680px,100dvh - 72px);margin:0 auto;padding:clamp(3rem,7vw,5.5rem) 0;display:grid;position:relative}.hero-copy{z-index:1;position:relative}.hero-copy:before{background:var(--color-accent);content:"";border-radius:4px;width:4px;position:absolute;top:-2rem;bottom:-2rem;left:-1.5rem}.hero-label{color:var(--color-accent-strong);font-family:var(--font-utility);letter-spacing:.08em;margin:0 0 1rem;font-size:.78rem;font-weight:700}.hero h1{color:var(--color-heading);font-family:var(--font-display);letter-spacing:-.065em;margin:0;font-size:clamp(2.55rem,4.1vw,3.7rem);font-weight:800;line-height:1.14}.hero-description{max-width:34rem;color:var(--color-muted);margin:1.5rem 0 1.8rem;font-size:clamp(1rem,1.4vw,1.12rem)}.primary-link{background:var(--color-accent-strong);min-height:48px;box-shadow:0 12px 32px rgb(var(--shadow-tint) / .15);color:var(--color-on-accent);border-radius:12px;align-items:center;gap:1.25rem;padding:.65rem 1.2rem;font-weight:800;text-decoration:none;transition:transform .18s,box-shadow .18s;display:inline-flex}.primary-link:hover{box-shadow:0 16px 40px rgb(var(--shadow-tint) / .22);transform:translateY(-2px)}.primary-link:active{transform:translateY(1px)}.hero-visual{margin:0;position:relative}.hero-visual:before{z-index:-1;border:1px solid var(--color-border);border-radius:var(--radius);content:"";position:absolute;inset:-16px 16px 16px -16px}.hero-visual img{border-radius:var(--radius);width:100%;min-height:420px;max-height:560px;box-shadow:0 30px 70px rgb(var(--shadow-tint) / .2);object-fit:cover;object-position:58% center}.article-list{padding:clamp(4rem, 8vw, 7rem) max(1rem, calc((100% - var(--content-wide)) / 2));background:var(--color-surface)}.section-heading{max-width:650px;margin-bottom:clamp(2rem,5vw,3.5rem)}.section-heading h2{color:var(--color-heading);font-family:var(--font-display);letter-spacing:-.05em;margin:0;font-size:clamp(2rem,4vw,3.4rem);line-height:1.25}.section-heading p{color:var(--color-muted);margin:1rem 0 0}.article-grid{grid-template-columns:repeat(12,minmax(0,1fr));gap:1.25rem;display:grid}.article-card{border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);flex-direction:column;grid-column:span 5;min-height:340px;padding:clamp(1.5rem,3vw,2.25rem);transition:border-color .18s,transform .18s;display:flex}.article-card.featured{background:linear-gradient(145deg, color-mix(in srgb, var(--color-accent) 12%, var(--color-surface-soft)), var(--color-bg) 62%);grid-column:span 7}.article-card:hover{border-color:var(--color-accent);transform:translateY(-4px)}.article-meta{color:var(--color-muted);font-family:var(--font-utility);justify-content:space-between;align-items:center;gap:1rem;font-size:.78rem;display:flex}.article-meta span{color:var(--color-accent-strong);font-weight:700}.article-card h3{color:var(--color-heading);font-family:var(--font-display);letter-spacing:-.03em;margin:2.25rem 0 1rem;font-size:clamp(1.35rem,2.2vw,2rem);line-height:1.5}.article-card h3 a{color:inherit;text-decoration:none}.article-card p{color:var(--color-muted);margin:0 0 1.5rem;font-size:.95rem}.read-link{align-items:center;gap:.75rem;width:fit-content;margin-top:auto;font-weight:800;text-decoration:none;display:inline-flex}.read-link span,.primary-link span{transition:transform .18s}.read-link:hover span,.primary-link:hover span{transform:translate(4px)}.article,.static-page{width:min(calc(100% - 2rem), var(--content-reading));margin:0 auto;padding:clamp(3rem,7vw,6rem) 0}.article>h1,.static-page>h1{color:var(--color-heading);font-family:var(--font-display);letter-spacing:-.045em;margin:0 0 1.25rem;font-size:clamp(2rem,4.5vw,3.4rem);line-height:1.35}.article-date{color:var(--color-muted);font-family:var(--font-utility);margin:0 0 2rem;font-size:.88rem}.ad-disclosure{border:1px solid var(--color-notice-border);background:var(--color-notice-bg);border-radius:12px;margin:1.25rem 0 .8rem;padding:.7rem 1rem;font-size:.84rem}.article-body{font-size:1.02rem}.article-body :is(h2,h3){color:var(--color-heading);font-family:var(--font-display);line-height:1.45}.article-body h2{border-left:4px solid var(--color-accent);letter-spacing:-.025em;margin:4rem 0 1.25rem;padding-left:1rem;font-size:clamp(1.45rem,3vw,2rem)}.article-body h3{margin:2.7rem 0 1rem;font-size:1.25rem}.article-body p{margin:1.25rem 0}.article-body ul,.article-body ol{margin:1.4rem 0;padding-left:1.5rem}.article-body li{margin:.55rem 0;padding-left:.2rem}.article-body blockquote{border-left:4px solid var(--color-accent);border-radius:0 var(--radius) var(--radius) 0;background:var(--color-surface-soft);color:var(--color-muted);margin:2rem 0;padding:1.25rem 1.5rem}.article-body code{background:var(--color-surface-soft);border-radius:5px;padding:.1em .35em;font-size:.92em}.site-footer{border-top:1px solid var(--color-border);background:var(--color-surface-soft)}.footer-inner{grid-template-columns:1fr auto;align-items:start;gap:2rem;padding:3rem 0;display:grid}.footer-title{font-size:1.1rem}.footer-inner p{color:var(--color-muted);margin:.35rem 0 0;font-size:.88rem}.site-footer nav a{color:var(--color-muted);font-size:.86rem;font-weight:700;text-decoration:none}.site-footer nav a:hover{color:var(--color-heading)}.copyright{border-top:1px solid var(--color-border);grid-column:1/-1;padding-top:1.5rem}@media (width<=860px){.hero{grid-template-columns:1fr;gap:3rem;min-height:auto}.hero-copy{max-width:650px}.hero-visual img{min-height:360px}.article-card,.article-card.featured{grid-column:span 6}}@media (width<=700px){.header-inner{flex-wrap:wrap;gap:.25rem 1rem;min-height:64px;padding:.75rem 0}.site-header nav{justify-content:space-between;width:100%;overflow-x:auto}.hero{padding:3.5rem 0 4rem}.hero-copy:before{width:3px;top:-1.5rem;bottom:-1.5rem;left:-.75rem}.hero h1{font-size:clamp(2.35rem,11vw,3.5rem)}.hero-visual:before{inset:-10px 10px 10px -10px}.hero-visual img{min-height:300px;max-height:430px}.article-grid{grid-template-columns:1fr}.article-card,.article-card.featured{grid-column:auto;min-height:0}.article-card h3{margin-top:1.75rem}.footer-inner{grid-template-columns:1fr}.site-footer nav{flex-direction:column;align-items:flex-start}.copyright{grid-column:auto}}@media (width<=420px){.site-title{font-size:1rem}.site-header nav a{font-size:.78rem}.article-meta{flex-direction:column;align-items:flex-start;gap:.25rem}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}