:root{--color-bg:#fafaf8;--color-bg-soft:#f1f0ea;--color-ink:#1a1a1a;--color-ink-soft:#55524c;--color-brand:#0f3d5c;--color-brand-dark:#0a2c44;--color-accent:#c8623a;--color-general:#b5732b;--color-line:#d9d7d0;--color-pro:#0f3d5c;--font-sans:-apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Meiryo", sans-serif;--font-serif:"Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", serif;--font-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;--radius:4px;--width-content:720px;--width-wide:1080px;--width-tool:980px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-12:48px;--shadow-card:0 12px 32px #0f3d5c24;--shadow-focus:0 0 0 2px #0f3d5c2e;--tint-brand:#0f3d5c0f;--tint-brand-strong:#0f3d5c1a;--tint-accent:#c8623a1a;--color-warn-bg:#fff7e0;--color-warn-border:#f0d68a;--color-warn-ink:#6b5310;--color-accent-dark:#b1512d}*{box-sizing:border-box}html{font-family:var(--font-sans);color:var(--color-ink);background:var(--color-bg);-webkit-font-smoothing:antialiased;scroll-behavior:smooth;line-height:1.8}body{margin:0}a{color:var(--color-brand-dark);text-decoration:none}a:hover{text-decoration:underline}img{border-radius:8px;max-width:100%;height:auto}h1,h2,h3,h4{font-family:var(--font-serif);letter-spacing:.01em;font-weight:700;line-height:1.45}.container{width:100%;max-width:var(--width-content);margin-inline:auto;padding-inline:20px}.container-wide{max-width:var(--width-wide)}.prose-cap{max-width:680px}.site-header{border-bottom:1px solid var(--color-line);background:var(--color-bg);z-index:10;position:sticky;top:0}.site-header .inner{justify-content:space-between;align-items:center;gap:16px;padding-block:14px;display:flex}.brand{font-family:var(--font-serif);color:var(--color-ink);letter-spacing:.02em;flex-direction:column;align-items:center;gap:3px;font-size:1.3rem;font-weight:700;line-height:1.05;display:inline-flex}.brand:hover{text-decoration:none}.brand .mark{color:var(--color-brand)}.brand-tag{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--color-ink-soft);font-size:.6rem;font-weight:400}@media (width<=640px){.brand-tag{display:none}}.nav{flex-wrap:wrap;gap:18px;font-size:.92rem;font-weight:600;display:flex}.nav a{color:var(--color-ink-soft)}.nav a:hover{color:var(--color-brand-dark);text-decoration:none}.nav-label{letter-spacing:.06em;color:#fff;background:var(--color-brand);border-radius:999px;align-self:center;padding:2px 8px;font-size:.68rem;font-weight:700}.nav-label+a~.nav-label{background:var(--color-general)}.nav-sep{background:var(--color-line);align-self:center;width:1px;height:15px}.nav-toggle{cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:0;display:none}.nav-toggle-bar{background:var(--color-ink);border-radius:2px;width:22px;height:2px;margin-inline:auto;transition:transform .2s,opacity .2s;display:block}.nav-toggle[aria-expanded=true] .nav-toggle-bar:first-child{transform:translateY(7px)rotate(45deg)}.nav-toggle[aria-expanded=true] .nav-toggle-bar:nth-child(2){opacity:0}.nav-toggle[aria-expanded=true] .nav-toggle-bar:nth-child(3){transform:translateY(-7px)rotate(-45deg)}.site-footer{border-top:1px solid var(--color-line);color:var(--color-ink-soft);background:var(--color-bg-soft);margin-top:64px;padding-block:32px;font-size:.88rem}.site-footer .inner{flex-wrap:wrap;justify-content:space-between;gap:16px;display:flex}.badge{border-radius:999px;padding:2px 8px;font-size:.72rem;font-weight:700;line-height:1.6;display:inline-block}.badge-pro{background:var(--tint-brand-strong);color:var(--color-brand-dark)}.badge-general{color:var(--color-general);background:#b5732b24}.card-grid{grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:24px;display:grid}.card{border:1px solid var(--color-line);border-radius:var(--radius);background:var(--color-bg);flex-direction:column;transition:box-shadow .18s,transform .18s,border-color .18s;display:flex;overflow:hidden}.card:hover{box-shadow:var(--shadow-card);border-color:var(--color-brand);transform:translateY(-3px)}.card-thumb{aspect-ratio:16/9;background:var(--color-bg-soft);display:block;overflow:hidden}.card-thumb img{object-fit:cover;border-radius:0;width:100%;height:100%;transition:transform .3s}.card:hover .card-thumb img{transform:scale(1.04)}.card-thumb-ph{color:#fff;background:linear-gradient(135deg, var(--color-brand) 0%, var(--color-brand-dark) 100%);flex-direction:column;justify-content:center;align-items:center;gap:8px;width:100%;height:100%;display:flex}.lane-general .card-thumb-ph{background:linear-gradient(135deg,#c08a4a 0%,#b5732b 100%)}.card-thumb-ph .ph-mark{background:#ffffff2e;border-radius:12px;place-items:center;width:44px;height:44px;font-size:1.4rem;font-weight:800;display:grid}.card-thumb-ph .ph-cat{letter-spacing:.04em;opacity:.95;font-size:.9rem;font-weight:700}.card-body{flex-direction:column;flex:1;gap:8px;padding:16px 18px 18px;display:flex}.card-body .badge{align-self:flex-start}.card h3{margin:0;font-size:1.04rem;line-height:1.5}.card h3 a{color:var(--color-ink)}.card h3 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16px;display:flex}.related-card-label{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--color-accent);font-size:.66rem}.related-card-title{color:var(--color-brand-dark);font-size:.95rem;font-weight:600;line-height:1.5}.related-card-date{color:var(--color-ink-soft);font-size:.78rem}@media (width<=560px){.post-body .related-card img{width:104px}.related-card-title{font-size:.88rem}}.legacy-banner{background:var(--color-warn-bg);border:1px solid var(--color-warn-border);border-radius:var(--radius);color:var(--color-warn-ink);align-items:flex-start;gap:10px;margin:24px 0 28px;padding:12px 16px;font-size:.88rem;display:flex}.hero{background:linear-gradient(135deg, var(--color-brand) 0%, var(--color-brand-dark) 100%);color:#fff;padding:56px 0}.hero h1{margin:0 0 12px;font-size:2rem}.hero p{opacity:.95;max-width:40em;margin:0;font-size:1.05rem}.hero .lanes{flex-wrap:wrap;gap:12px;margin-top:24px;display:flex}.hero .lane-chip{color:#fff;background:#ffffff26;border:1px solid #ffffff4d;border-radius:999px;padding:6px 16px;font-size:.9rem;font-weight:600}.hero .lane-chip:hover{background:#ffffff47;text-decoration:none}.section-head{justify-content:space-between;align-items:baseline;margin:48px 0 20px;display:flex}.section-head h2{margin:0;font-size:1.4rem}@media (width<=768px){.nav-toggle{display:flex}.nav{background:var(--color-bg);border-bottom:1px solid var(--color-line);flex-direction:column;gap:0;padding:8px 0 12px;font-size:1rem;display:none;position:absolute;top:100%;left:0;right:0;box-shadow:0 12px 24px #0f3d5c1a}.nav.open{display:flex}.nav a{color:var(--color-ink);padding:12px 20px;display:block}.nav a:active{background:var(--color-bg-soft)}.nav-label{color:var(--color-ink-soft);border-bottom:1px solid var(--color-line);background:0 0;border-radius:0;align-self:stretch;margin:8px 20px 2px;padding:2px 8px;font-size:.72rem}.nav-label+a~.nav-label{background:0 0}.nav-sep{border-bottom:1px solid var(--color-line);background:0 0;align-self:stretch;width:auto;height:auto;margin:8px 20px 2px}}@media (width<=640px){.container{padding-inline:16px}.hero{padding:36px 0}.hero h1{font-size:1.6rem}.hero p{font-size:.98rem}.hero .lanes{gap:8px;margin-top:18px}.hero .lane-chip{padding:5px 12px;font-size:.84rem}.section-head{flex-wrap:wrap;gap:4px 12px;margin:32px 0 16px}.section-head h2{font-size:1.2rem}.card-grid{gap:16px}.post-body{font-size:1rem}.post-body h2{margin-top:1.8em;font-size:1.25rem}.post-body h3{font-size:1.08rem}.post-body table{-webkit-overflow-scrolling:touch;max-width:100%;display:block;overflow-x:auto}.post-title{font-size:1.4rem}}.key-points{background:var(--color-bg-soft);border:1px solid var(--color-line);border-left:4px solid var(--color-brand);border-radius:10px;margin:28px 0 8px;padding:20px 24px}.key-points-title{color:var(--color-brand-dark);letter-spacing:.02em;margin:0 0 10px;font-size:.95rem;font-weight:800}.key-points ul{margin:0;padding-left:1.2em}.key-points li{margin:6px 0;line-height:1.7}.faq{border-top:1px solid var(--color-line);margin-top:48px;padding-top:8px}.faq h2{margin-top:24px}.faq-item{border-bottom:1px solid var(--color-line);padding:16px 0}.faq-q{color:var(--color-ink);margin:0 0 8px;font-size:1.05rem}.faq-q:before{content:"Q. ";color:var(--color-brand);font-weight:800}.faq-a{color:var(--color-ink-soft);margin:0;line-height:1.85}.faq-a:before{content:"A. ";color:var(--color-accent);font-weight:800}