:root{--ink:#173a32;--muted:#60756e;--green:#2f6859;--deep:#163d35;--cream:#f8f5ec;--paper:#fffdf7;--sun:#e9b95f;--line:rgba(23,58,50,.13);--shadow:0 22px 60px rgba(29,64,53,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--cream);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",sans-serif;line-height:1.9;letter-spacing:.02em}a{color:inherit}.container{width:min(1080px,calc(100% - 40px));margin:auto}.nav{position:sticky;top:0;z-index:20;background:rgba(248,245,236,.9);backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between}.brand img{display:block;width:145px;height:55px;object-fit:contain}.nav-links{display:flex;align-items:center;gap:24px;font-size:13px;font-weight:700}.nav-links a{text-decoration:none}.nav-cta,.cta{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;color:#fff;background:var(--deep);border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 25px rgba(22,61,53,.16)}
.breadcrumb{padding-top:32px;color:var(--muted);font-size:13px}.breadcrumb a{text-decoration:none}.article-hero{padding:56px 0 48px}.eyebrow{color:var(--green);font-size:12px;font-weight:800;letter-spacing:.18em}.article-hero h1{max-width:850px;margin:16px 0 18px;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(34px,5vw,58px);line-height:1.35;letter-spacing:.04em}.lead{max-width:780px;color:var(--muted);font-size:18px}.meta{display:flex;gap:18px;margin-top:24px;color:var(--muted);font-size:13px}.article-grid{display:grid;grid-template-columns:minmax(0,720px) 280px;gap:56px;align-items:start}.article-body{padding:46px 52px;background:var(--paper);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}.article-body h2{margin:2.5em 0 .7em;font-size:28px;line-height:1.5}.article-body h2:first-child{margin-top:0}.article-body h3{margin:2em 0 .5em;font-size:20px}.article-body p{margin:1em 0}.article-body ul,.article-body ol{padding-left:1.4em}.article-body li{margin:.55em 0}.summary,.note{margin:26px 0;padding:22px 24px;border-radius:18px}.summary{background:#eef4eb;border-left:4px solid #789c73}.note{background:#fbf3df;border:1px solid rgba(233,185,95,.38)}.summary strong,.note strong{display:block;margin-bottom:6px}.toc{position:sticky;top:98px;padding:24px;background:rgba(255,253,247,.75);border:1px solid var(--line);border-radius:20px}.toc strong{display:block;margin-bottom:10px}.toc a{display:block;padding:6px 0;color:var(--muted);font-size:13px;text-decoration:none}.source-list{font-size:14px}.source-list a{color:var(--green)}.article-cta{margin-top:38px;padding:32px;background:var(--deep);color:white;border-radius:22px}.article-cta h2{margin:0 0 10px;color:white}.article-cta p{color:rgba(255,255,255,.8)}.article-cta .cta{background:#f2d487;color:var(--deep);box-shadow:none}.disclaimer{margin:30px 0;color:var(--muted);font-size:13px}.related{padding:80px 0}.related h2{font-size:30px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{display:flex;flex-direction:column;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:22px;text-decoration:none}.card span{color:var(--green);font-size:12px;font-weight:700}.card h3{margin:10px 0;line-height:1.55}.card p{margin:0;color:var(--muted);font-size:14px}footer{padding:34px 0;border-top:1px solid var(--line)}.footer-inner{display:flex;align-items:center;justify-content:space-between}.footer-links{display:flex;gap:18px;color:var(--muted);font-size:12px}.footer-links a{text-decoration:none}
.column-hero{padding:80px 0 50px}.column-hero h1{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(40px,6vw,68px);margin:10px 0}.column-hero p{max-width:680px;color:var(--muted);font-size:18px}.column-list{padding:10px 0 100px}.column-list .card-grid{grid-template-columns:repeat(3,1fr)}.column-list .card{min-height:290px}.column-list .card h2{font-size:23px;line-height:1.55}.column-list .card p{margin-bottom:24px}.read{margin-top:auto;color:var(--green);font-weight:700;font-size:13px}
@media(max-width:850px){.article-grid{grid-template-columns:1fr}.toc{display:none}.card-grid,.column-list .card-grid{grid-template-columns:1fr}.nav-links>a:not(.nav-cta){display:none}.article-body{padding:34px 26px}.footer-inner{align-items:flex-start;flex-direction:column;gap:18px}.footer-links{flex-wrap:wrap}.meta{flex-direction:column;gap:2px}}