:root{color-scheme:light dark;--bg: #f3f5f7;--surface: #ffffff;--surface-soft: #e8eef3;--text: #1f2d3d;--muted: #536579;--brand: #245b78;--brand-strong: #183f56;--accent: #8a641b;--risk: #7a3e24;--border: #c5d0da;--focus: #875b00;--shadow: 0 14px 40px rgb(31 45 61 / 9%);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Yu Gothic UI,Hiragino Sans,Noto Sans JP,sans-serif;font-size:16px;line-height:1.75;background:var(--bg);color:var(--text)}*{box-sizing:border-box}html{min-width:0;overflow-x:hidden;scroll-behavior:smooth}body{min-width:0;margin:0;overflow-wrap:anywhere;background:linear-gradient(90deg,transparent 0 49.8%,rgb(36 91 120 / 3%) 50% 50.2%,transparent 50.2%),var(--bg);background-size:5rem 100%}img,svg,video,table{max-width:100%}img,svg,video{height:auto}table{display:block;overflow-x:auto;border-collapse:collapse}a{color:var(--brand-strong);text-underline-offset:.2em;text-decoration-thickness:.08em}a:hover{text-decoration-thickness:.14em}:focus-visible{outline:3px solid var(--focus);outline-offset:4px}h1,h2,h3{margin-block:0 .65em;line-height:1.35;letter-spacing:.02em}h1{font-size:clamp(2rem,8.5vw,3.65rem)}h2{font-size:clamp(1.45rem,5vw,2.15rem)}h3{font-size:1.2rem}p,ul,ol{margin-block:0 1.25rem}.skip-link{position:fixed;z-index:100;top:.75rem;left:.75rem;transform:translateY(-180%);padding:.65rem 1rem;border-radius:.35rem;background:var(--text);color:var(--surface)}.skip-link:focus{transform:translateY(0)}.site-header{border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 94%,transparent)}.header-inner,.footer-inner,.section-shell,.article-shell{width:min(100% - 2rem,70rem);margin-inline:auto}.header-inner{display:flex;flex-direction:column;gap:.8rem;padding-block:1rem}.site-brand{display:inline-flex;align-items:center;gap:.65rem;width:fit-content;color:var(--text);font-size:1.12rem;font-weight:800;text-decoration:none}.brand-mark{display:grid;width:2.25rem;height:2.25rem;place-items:center;border-radius:.35rem;background:var(--brand);color:#fff}.header-inner nav,.site-footer nav{display:flex;flex-wrap:wrap;gap:.6rem 1.15rem}.header-inner nav a{color:var(--text);font-size:.94rem;font-weight:650;text-decoration:none}.section-shell{padding-block:clamp(3.5rem,10vw,6.5rem)}.hero{padding-block:clamp(4.5rem,15vw,8rem)}.hero h1{max-width:13ch}.hero-copy,.lead{max-width:42rem;color:var(--muted);font-size:clamp(1.05rem,3vw,1.2rem)}.eyebrow,.card-category{margin-bottom:.65rem;color:var(--brand);font-size:.82rem;font-weight:800;letter-spacing:.14em}a.eyebrow{display:inline-block;text-decoration:none}.button{display:inline-flex;min-height:3rem;align-items:center;justify-content:center;padding:.65rem 1.25rem;border:2px solid var(--brand);border-radius:.45rem;background:var(--brand);color:#fff;font-weight:750;text-align:center;text-decoration:none}.button:hover{background:var(--brand-strong)}.button.is-muted,.button[aria-disabled=true]{border-color:var(--border);background:var(--surface-soft);color:var(--muted);cursor:not-allowed}.section-heading{max-width:45rem;margin-bottom:2rem}.heading-row{display:flex;align-items:end;justify-content:space-between;gap:1rem;max-width:none}.category-grid,.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:1rem}.category-card,.article-card,.empty-state,.product-box{min-width:0;border:1px solid var(--border);border-radius:.65rem;background:var(--surface);box-shadow:var(--shadow)}.category-card{display:flex;min-height:9rem;flex-direction:column;justify-content:space-between;gap:1rem;padding:1.25rem;border-top:4px solid var(--brand);color:var(--text);text-decoration:none}.category-card strong{font-size:1.3rem}.category-card span{color:var(--muted)}.article-card{padding:1.4rem}.article-card h2{font-size:1.35rem}.article-card h2 a{color:var(--text);text-decoration:none}.article-card p:not(.card-category),.article-card time{color:var(--muted)}.article-card time{font-size:.88rem}.empty-state{padding:1.5rem;color:var(--muted)}.page-header{padding-bottom:1rem}.page-header p:last-child{color:var(--muted)}.article-shell{max-width:50rem;padding-block:clamp(3.5rem,10vw,6rem)}.article-header{padding-bottom:2rem;border-bottom:1px solid var(--border)}.article-meta{display:flex;flex-wrap:wrap;gap:.3rem 1rem;color:var(--muted);font-size:.9rem}.tag-list{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:1rem;padding:0;list-style:none}.tag-list li{padding:.15rem .65rem;border-radius:999px;background:var(--surface-soft);color:var(--brand-strong);font-size:.85rem}.article-content{padding-top:2rem;font-size:1.04rem}.article-content h2{margin-top:2.8rem;padding-bottom:.45rem;border-bottom:2px solid var(--border)}.article-content h3{margin-top:2rem}.article-content li+li{margin-top:.5rem}.article-content blockquote{margin-inline:0;padding:1rem 1.2rem;border-left:4px solid var(--accent);background:var(--surface)}.affiliate-notice,.risk-notice{padding:1rem;border-radius:.45rem;font-size:.92rem;font-weight:700}.affiliate-notice{margin-bottom:2rem;border:1px solid var(--accent);background:color-mix(in srgb,var(--accent) 9%,var(--surface))}.risk-notice{border:1px solid var(--risk);background:color-mix(in srgb,var(--risk) 7%,var(--surface))}.risk-notice.is-opening{margin-bottom:1rem}.risk-notice.is-closing{margin-top:3rem}.product-box{display:grid;gap:1rem;margin-block:2rem;padding:1.25rem}.product-name{margin-bottom:.35rem;font-size:1.2rem;font-weight:800}.legal-page{max-width:48rem}.legal-page h2{margin-top:2.75rem}.note{margin-top:1.5rem;color:var(--muted);font-size:.92rem}.site-footer{margin-top:3rem;padding-block:3rem 1.5rem;border-top:1px solid var(--border);background:var(--surface-soft)}.footer-inner{display:grid;gap:2rem}.footer-title{margin-bottom:.3rem;font-size:1.2rem;font-weight:800}.footer-inner p:not(.footer-title),.copyright{color:var(--muted)}.site-footer nav{align-content:start;flex-direction:column}.copyright{width:min(100% - 2rem,70rem);margin:2rem auto 0;padding-top:1rem;border-top:1px solid var(--border)}@media(min-width:42rem){.header-inner{flex-direction:row;align-items:center;justify-content:space-between}.category-grid,.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-inner{grid-template-columns:1.2fr 1fr}.product-box{grid-template-columns:minmax(0,1fr) auto;align-items:center}}@media(prefers-color-scheme:dark){:root{--bg: #111b24;--surface: #1b2835;--surface-soft: #223444;--text: #f1f5f8;--muted: #bdc9d3;--brand: #83bdd4;--brand-strong: #acd9e8;--accent: #e0b65f;--risk: #e2a287;--border: #465d6f;--focus: #ffd477;--shadow: 0 14px 40px rgb(0 0 0 / 22%)}.brand-mark,.button{background:#2b6885;color:#fff}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}