:root{--ld-bg:#f2f3f5;--ld-surface:#fff;--ld-surface-2:#f7f8fa;--ld-surface-3:#eceef2;--ld-ink:#090b0f;--ld-ink-2:#3b424f;--ld-ink-3:#77808f;--ld-line:#dde1e7;--ld-line-strong:#aab2bf;--ld-accent:#f2382a;--ld-accent-deep:#c72417;--ld-accent-soft:#ffefec;--ld-blue:#2457f5;--ld-blue-soft:#eaf0ff;--ld-gold:#a97412;--ld-gold-soft:#fbf2dc;--ld-green:#00845f;--ld-green-soft:#e3f6ef;--ld-shell:#080a0e;--ld-shell-2:#11151b;--ld-shell-3:#191e26;--ld-shell-line:#262d37;--ld-shell-text:#f7f8fa;--ld-shell-muted:#8b95a5;--ld-top-h:72px;--ld-rail-w:264px;--ld-content-max:1320px;--ld-read-max:760px;--ld-radius:2px;--font-serif:"Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "MS PMincho", serif;--font-shippori:"Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "MS PMincho", serif;--font-noto-serif:"Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", "MS PMincho", serif;--font-sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Meiryo", sans-serif;--ld-shadow:0 1px 0 #090b0f0a;--ld-shadow-lift:0 18px 50px #090b0f1f;--background:var(--ld-bg);--foreground:var(--ld-ink);--card:var(--ld-surface);--card-foreground:var(--ld-ink);--popover:var(--ld-surface);--popover-foreground:var(--ld-ink);--primary:var(--ld-ink);--primary-foreground:var(--ld-surface);--secondary:var(--ld-surface-2);--secondary-foreground:var(--ld-ink);--muted:var(--ld-surface-3);--muted-foreground:var(--ld-ink-3);--accent:var(--ld-accent);--accent-foreground:#fff;--border:var(--ld-line);--input:var(--ld-line);--ring:var(--ld-accent);--radius:var(--ld-radius);--card-radius:var(--ld-radius);--btn-radius:var(--ld-radius);--input-radius:var(--ld-radius);--accent-color:var(--ld-accent);--focus-ring:var(--ld-accent);--text-primary:var(--ld-ink);--text-secondary:var(--ld-ink-2);--bg-primary:var(--ld-bg);--bg-secondary:var(--ld-surface-2);--bg-tertiary:var(--ld-surface-3);--bg-focus:var(--ld-accent-soft);--reader-surface:var(--ld-surface);--reader-muted:var(--ld-surface-2);--reader-line:var(--ld-line);--reader-ink:var(--ld-ink);--reader-accent:var(--ld-accent)}html{scroll-behavior:smooth}body{background:var(--ld-bg);color:var(--ld-ink);font-family:var(--font-sans);font-feature-settings:"palt" 1;-webkit-font-smoothing:antialiased}::selection{background:var(--ld-accent);color:#fff}body.ld-shell-active #global-side-menu,body.ld-shell-active [data-global-side-menu-trigger]{display:none!important}.ld-topbar{z-index:200;height:var(--ld-top-h);border-bottom:1px solid var(--ld-shell-line);background:var(--ld-shell);color:var(--ld-shell-text);position:fixed;inset:0 0 auto}.ld-topbar-inner{align-items:center;gap:28px;width:100%;max-width:1600px;height:100%;margin:0 auto;padding:0 24px;display:flex}.ld-topbar-brand{min-width:176px;height:100%;color:var(--ld-shell-text);flex:none;align-items:center;gap:10px;text-decoration:none;display:flex}.ld-topbar-logo{width:176px;height:44px}.ld-topbar-logo-img{filter:brightness(0)invert();opacity:.98}.ld-topbar-nav{flex:auto;align-items:stretch;gap:2px;min-width:0;height:100%;display:flex}.ld-topbar-link{color:var(--ld-shell-muted);letter-spacing:.02em;align-items:center;gap:8px;padding:0 16px;font-size:12px;font-weight:650;text-decoration:none;transition:color .16s,background .16s;display:inline-flex;position:relative}.ld-topbar-link:hover{background:var(--ld-shell-2);color:var(--ld-shell-text)}.ld-topbar-link[aria-current=page]{color:var(--ld-shell-text)}.ld-topbar-link[aria-current=page]:after{background:var(--ld-accent);content:"";height:2px;position:absolute;bottom:-1px;left:16px;right:16px}.ld-topbar-link-index{color:var(--ld-shell-muted);font-family:var(--font-mono);font-size:9px;font-weight:500}.ld-topbar-link[aria-current=page] .ld-topbar-link-index{color:var(--ld-accent)}.ld-topbar-search{border:1px solid var(--ld-shell-line);border-radius:var(--ld-radius);background:var(--ld-shell-2);min-width:190px;height:40px;color:var(--ld-shell-muted);text-align:left;flex:0 320px;align-items:center;gap:10px;padding:0 14px;font-size:12px;transition:border-color .16s,background .16s;display:flex}.ld-topbar-search:hover{border-color:var(--ld-accent);background:var(--ld-shell-3)}.ld-topbar-search kbd{border:1px solid var(--ld-shell-line);background:var(--ld-shell);color:var(--ld-shell-muted);font-family:var(--font-mono);border-radius:2px;margin-left:auto;padding:2px 6px;font-size:9px;line-height:1.4}.ld-topbar-actions{flex:none;align-items:center;gap:16px;display:flex}.ld-topbar-progress{color:var(--ld-shell-muted);letter-spacing:.06em;white-space:nowrap;align-items:center;gap:6px;font-size:11px;font-weight:700;display:inline-flex}.ld-topbar-progress:before{background:var(--ld-accent);content:"";border-radius:50%;width:6px;height:6px}.ld-topbar-progress strong{color:var(--ld-shell-text);font-family:var(--font-mono);font-size:13px;font-weight:600}.ld-account{align-items:center;display:flex}.ld-account>div>div:first-child{display:none!important}.ld-account>div>button{border:1px solid var(--ld-shell-line)!important;border-radius:var(--ld-radius)!important;background:var(--ld-shell-2)!important;width:38px!important;height:38px!important;box-shadow:none!important;color:var(--ld-shell-text)!important}.ld-account>div>button:hover{border-color:var(--ld-accent)!important}.ld-account .btn-primary,.ld-account>a{border-radius:var(--ld-radius)!important;background:var(--ld-accent)!important;min-height:38px!important;box-shadow:none!important;color:#fff!important;padding:0 16px!important;font-size:12px!important}.ld-rail{top:var(--ld-top-h);z-index:150;width:var(--ld-rail-w);border-right:1px solid var(--ld-shell-line);background:var(--ld-shell);color:var(--ld-shell-text);scrollbar-width:thin;flex-direction:column;display:flex;position:fixed;bottom:0;left:0;overflow-y:auto}.ld-rail-inner{flex-direction:column;flex:1;gap:28px;padding:26px 18px 20px;display:flex}.ld-rail-label{color:var(--ld-shell-muted);letter-spacing:.18em;text-transform:uppercase;align-items:center;gap:8px;padding:0 10px;font-size:9px;font-weight:750;display:flex}.ld-rail-label:after{background:var(--ld-shell-line);content:"";flex:1;height:1px}.ld-rail-nav{gap:2px;display:grid}.ld-rail-link{min-height:44px;color:var(--ld-shell-muted);border-left:2px solid #0000;grid-template-columns:minmax(0,1fr) 16px;align-items:center;gap:8px;padding:8px 10px;font-size:12px;font-weight:600;text-decoration:none;transition:background .16s,color .16s,border-color .16s;display:grid}.ld-rail-link:hover{background:var(--ld-shell-2);color:var(--ld-shell-text)}.ld-rail-link[aria-current=page]{border-left-color:var(--ld-accent);background:var(--ld-shell-2);color:var(--ld-shell-text)}.ld-rail-link-index{color:var(--ld-shell-muted);font-family:var(--font-mono);font-size:9px}.ld-rail-link[aria-current=page] .ld-rail-link-index{color:var(--ld-accent)}.ld-rail-link svg{color:var(--ld-shell-muted)}.ld-rail-link[aria-current=page] svg{color:var(--ld-accent)}.ld-rail-recent{gap:1px;display:grid}.ld-rail-recent a{color:var(--ld-shell-muted);text-overflow:ellipsis;white-space:nowrap;border-left:2px solid #0000;padding:8px 10px;font-size:11px;line-height:1.5;text-decoration:none;display:block;overflow:hidden}.ld-rail-recent a:hover{border-left-color:var(--ld-accent);background:var(--ld-shell-2);color:var(--ld-shell-text)}.ld-rail-recent small{color:#626c7b;font-size:9px;font-weight:600;display:block}.ld-rail-progress{border:1px solid var(--ld-shell-line);background:var(--ld-shell-2);gap:10px;padding:16px;display:grid}.ld-rail-progress-head{justify-content:space-between;align-items:baseline;gap:8px;display:flex}.ld-rail-progress-head span{color:var(--ld-shell-muted);letter-spacing:.14em;text-transform:uppercase;font-size:9px;font-weight:750}.ld-rail-progress-head strong{color:var(--ld-shell-text);font-family:var(--font-mono);font-size:20px;font-weight:500}.ld-rail-progress-bar{background:var(--ld-shell-line);height:4px;position:relative;overflow:hidden}.ld-rail-progress-bar span{background:var(--ld-accent);height:100%;transition:width .4s;display:block}.ld-rail-progress p{color:var(--ld-shell-muted);margin:0;font-size:10px;line-height:1.6}.ld-rail-footer{border-top:1px solid var(--ld-shell-line);gap:2px;padding-top:18px;display:grid}.ld-rail-footer .ld-rail-link{grid-template-columns:24px minmax(0,1fr)}.ld-mobile-nav{display:none}body.ld-shell-active #global-main-area,body.ld-shell-active #global-main-area.global-main-area-shell{min-height:100dvh;padding-top:var(--ld-top-h);padding-left:var(--ld-rail-w);margin-left:0!important}@media (width<=1180px){:root{--ld-rail-w:232px}}@media (width<=1023px){:root{--ld-top-h:60px}.ld-topbar-inner{gap:12px;padding:0 14px}.ld-topbar-brand{min-width:0}.ld-topbar-logo{width:142px;height:36px}.ld-topbar-nav,.ld-topbar-search,.ld-topbar-progress{display:none}.ld-topbar-actions{margin-left:auto}.ld-rail{display:none}body.ld-shell-active #global-main-area,body.ld-shell-active #global-main-area.global-main-area-shell{padding-top:var(--ld-top-h);padding-bottom:72px;padding-left:0;margin-left:0!important}.ld-mobile-nav{z-index:200;border-top:1px solid var(--ld-shell-line);background:var(--ld-shell);grid-template-columns:repeat(4,minmax(0,1fr));height:64px;display:grid;position:fixed;bottom:0;left:0;right:0}.ld-mobile-nav a,.ld-mobile-nav button{color:var(--ld-shell-muted);letter-spacing:.04em;flex-direction:column;justify-content:center;align-items:center;gap:4px;font-size:11px;font-weight:700;text-decoration:none;display:flex}.ld-mobile-nav a[aria-current=page]{color:var(--ld-accent)}}.ld-eyebrow{color:var(--ld-accent);font-family:var(--font-mono);letter-spacing:.18em;text-transform:uppercase;align-items:center;gap:8px;margin:0;font-size:10px;font-weight:650;line-height:1.5;display:inline-flex}.ld-eyebrow:before{content:"";background:currentColor;width:18px;height:2px}.ld-display{color:var(--ld-ink);font-family:var(--font-serif);letter-spacing:-.06em;text-wrap:balance;margin:0;font-size:clamp(2.8rem,5.6vw,5rem);font-weight:750;line-height:1.02}.ld-display-accent{color:var(--ld-accent)}.ld-title{color:var(--ld-ink);font-family:var(--font-serif);letter-spacing:-.04em;margin:0;font-size:clamp(1.9rem,3.2vw,2.8rem);font-weight:750;line-height:1.16}.ld-lede{max-width:52ch;color:var(--ld-ink-2);margin:0;font-size:14px;line-height:1.95}.ld-mono{font-family:var(--font-mono);letter-spacing:.08em;font-size:10px}.ld-btn{border:1px solid var(--ld-ink);border-radius:var(--ld-radius);background:var(--ld-surface);min-height:44px;color:var(--ld-ink);letter-spacing:.02em;justify-content:center;align-items:center;gap:8px;padding:0 18px;font-size:12px;font-weight:700;line-height:1;text-decoration:none;transition:background .16s,border-color .16s,color .16s,transform .16s;display:inline-flex}.ld-btn:hover{border-color:var(--ld-accent);background:var(--ld-accent);color:#fff}.ld-btn:active{transform:translateY(1px)}.ld-btn-primary{border-color:var(--ld-ink);background:var(--ld-ink);color:#fff}.ld-btn-primary:hover,.ld-btn-accent{border-color:var(--ld-accent);background:var(--ld-accent);color:#fff}.ld-btn-accent:hover{border-color:var(--ld-accent-deep);background:var(--ld-accent-deep)}.ld-btn-ghost{color:var(--ld-ink-2);background:0 0;border-color:#0000}.ld-btn-ghost:hover{border-color:var(--ld-ink);background:var(--ld-surface);color:var(--ld-ink)}.ld-icon-btn{border:1px solid var(--ld-line);border-radius:var(--ld-radius);background:var(--ld-surface);width:40px;height:40px;color:var(--ld-ink-2);place-items:center;transition:border-color .16s,color .16s,background .16s;display:grid}.ld-icon-btn:hover{border-color:var(--ld-ink);color:var(--ld-ink)}.ld-chip{border:1px solid var(--ld-line-strong);background:var(--ld-surface);min-height:24px;color:var(--ld-ink-2);letter-spacing:.02em;white-space:nowrap;border-radius:999px;align-items:center;gap:5px;padding:2px 8px;font-size:10px;font-weight:650;line-height:1.3;display:inline-flex}.ld-chip-accent{border-color:var(--ld-accent);background:var(--ld-accent);color:#fff}.ld-chip-gold{border-color:var(--ld-gold);background:var(--ld-gold-soft);color:#6e4b0a}.ld-card{border:1px solid var(--ld-ink);background:var(--ld-surface)}.ld-section-head{align-items:baseline;gap:16px;margin-bottom:18px;display:flex}.ld-section-head h2{color:var(--ld-ink);font-family:var(--font-serif);letter-spacing:-.02em;margin:0;font-size:20px;font-weight:750}.ld-section-head span{background:var(--ld-line);flex:1;height:1px}.ld-section-head a{color:var(--ld-accent);letter-spacing:.08em;font-size:10px;font-weight:700;text-decoration:none}.ld-section-head a:hover{color:var(--ld-accent-deep)}.ld-home{width:100%;max-width:var(--ld-content-max);margin:0 auto;padding:clamp(24px,4vw,48px) clamp(18px,4vw,40px) 88px}.ld-home-hero{border:1px solid var(--ld-ink);background:var(--ld-surface);grid-template-columns:minmax(0,1.4fr) minmax(260px,.6fr);gap:clamp(24px,4vw,48px);padding:clamp(28px,4vw,52px);display:grid}.ld-home-hero-copy{align-content:center;gap:22px;min-width:0;display:grid}.ld-home-hero .ld-lede{max-width:46ch}.ld-hero-actions{flex-wrap:wrap;gap:10px;margin-top:4px;display:flex}.ld-hero-meta{border-top:1px solid var(--ld-ink);flex-wrap:wrap;gap:0;margin-top:10px;display:flex}.ld-hero-meta span{color:var(--ld-ink-3);font-family:var(--font-mono);letter-spacing:.06em;padding:12px 22px 0 0;font-size:11px}.ld-hero-meta strong{color:var(--ld-accent);font-size:18px;font-weight:600}.ld-hero-panel{background:var(--ld-shell);min-width:0;color:var(--ld-shell-text);align-content:start;gap:16px;padding:24px;display:grid}.ld-hero-panel-head{border-bottom:1px solid var(--ld-shell-line);color:var(--ld-shell-muted);font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;justify-content:space-between;align-items:center;gap:10px;padding-bottom:12px;font-size:9px;display:flex}.ld-hero-panel-head span:last-child{color:var(--ld-accent)}.ld-hero-panel-stat{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.ld-hero-panel-stat strong{color:var(--ld-shell-text);font-family:var(--font-serif);font-size:34px;font-weight:650;line-height:1}.ld-hero-panel-stat span{color:var(--ld-shell-muted);font-family:var(--font-mono);letter-spacing:.12em;font-size:9px}.ld-hero-panel-progress{background:var(--ld-shell-line);height:4px;margin-top:4px;overflow:hidden}.ld-hero-panel-progress span{background:var(--ld-accent);height:100%;display:block}.ld-hero-panel p{color:var(--ld-shell-muted);margin:0;font-size:10px;line-height:1.7}.ld-hero-panel-link{border:1px solid var(--ld-shell-line);min-height:42px;color:var(--ld-shell-text);justify-content:space-between;align-items:center;gap:10px;margin-top:4px;padding:0 12px;font-size:11px;font-weight:700;text-decoration:none;transition:border-color .16s,background .16s;display:inline-flex}.ld-hero-panel-link:hover{border-color:var(--ld-accent);background:var(--ld-shell-2)}.ld-home-section{padding-top:clamp(32px,4.5vw,56px)}.ld-continue{border:1px solid var(--ld-ink);background:var(--ld-surface);align-items:center;gap:18px;padding:18px 20px;text-decoration:none;transition:background .16s,border-color .16s;display:flex}.ld-continue:hover{border-color:var(--ld-accent);background:var(--ld-accent-soft)}.ld-continue-icon{border:1px solid var(--ld-ink);width:44px;height:44px;color:var(--ld-accent);flex:none;place-items:center;display:grid}.ld-continue-copy{flex:1;gap:3px;min-width:0;display:grid}.ld-continue-copy small{color:var(--ld-ink-3);font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;font-size:9px;font-weight:600}.ld-continue-copy strong{color:var(--ld-ink);font-family:var(--font-serif);text-overflow:ellipsis;white-space:nowrap;font-size:16px;font-weight:700;overflow:hidden}.ld-home-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.ld-feature-card{border:1px solid var(--ld-ink);background:var(--ld-surface);min-height:300px;color:var(--ld-ink);flex-direction:column;justify-content:space-between;gap:28px;padding:clamp(22px,3vw,32px);text-decoration:none;transition:background .18s,color .18s,transform .18s;display:flex;position:relative;overflow:hidden}.ld-feature-card:before{background:var(--ld-accent);content:"";height:4px;position:absolute;top:0;left:0;right:0}.ld-feature-card:hover{background:var(--ld-shell);color:var(--ld-shell-text);transform:translateY(-2px)}.ld-feature-card-top{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.ld-feature-card-top span:first-child{color:var(--ld-accent);font-family:var(--font-mono);letter-spacing:.14em;font-size:10px;font-weight:650}.ld-feature-card-top svg{color:var(--ld-ink-3);transition:color .16s,transform .16s}.ld-feature-card:hover .ld-feature-card-top svg{color:var(--ld-accent);transform:translate(2px,-2px)}.ld-feature-card h3{z-index:1;max-width:15ch;color:inherit;font-family:var(--font-serif);letter-spacing:-.04em;margin:0;font-size:clamp(1.65rem,2.8vw,2.3rem);font-weight:750;line-height:1.2;position:relative}.ld-feature-card p{z-index:1;max-width:36ch;color:var(--ld-ink-2);margin:10px 0 0;font-size:11px;line-height:1.8;position:relative}.ld-feature-card:hover p{color:var(--ld-shell-muted)}.ld-feature-card-meta{z-index:1;flex-wrap:wrap;gap:8px;display:flex;position:relative}.ld-feature-card .ld-chip{border-color:var(--ld-line-strong);color:var(--ld-ink-2)}.ld-feature-card:hover .ld-chip{border-color:var(--ld-shell-line);background:var(--ld-shell-2);color:var(--ld-shell-text)}.ld-home-lower{grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:16px;display:grid}.ld-recent-list{border-top:1px solid var(--ld-ink);display:grid}.ld-recent-row{border-bottom:1px solid var(--ld-line);min-height:60px;color:var(--ld-ink);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;padding:10px 4px;text-decoration:none;transition:background .16s,border-color 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