:root{--ptb-navy:#001030;--ptb-navy-deep:#000817;--ptb-gold:#d5ac54;--ptb-gold-dark:#9b6c1c;--ptb-ink:#101d32;--ptb-paper:#fff;--ptb-soft:#f3f5f7;--ptb-green:#176c5b}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body.pt-blog-page{margin:0;background:var(--ptb-soft);color:var(--ptb-ink);font-family:"Yu Mincho","Hiragino Mincho ProN","Hiragino Mincho Pro","Noto Serif JP",serif;letter-spacing:0;line-height:1.8}
body.pt-blog-page,body.pt-blog-page *{font-family:"Yu Mincho","Hiragino Mincho ProN","Hiragino Mincho Pro","Noto Serif JP",serif!important}
.pt-blog-page a{color:inherit}
.pt-blog-shell{width:min(1120px,calc(100% - 40px));margin:0 auto}
.pt-blog-header{position:relative;z-index:2;background:var(--ptb-navy-deep);color:#fff;border-bottom:1px solid rgba(213,172,84,.45)}
.pt-blog-header__inner{display:flex;align-items:center;justify-content:space-between;min-height:78px;gap:24px}
.pt-blog-brand{display:inline-flex;flex-direction:column;color:var(--ptb-gold)!important;font-size:24px;font-weight:700;line-height:1.05;text-decoration:none}
.pt-blog-brand span{margin-top:5px;color:#fff;font-size:11px;font-weight:400;letter-spacing:.08em}
.pt-blog-nav{display:flex;align-items:center;gap:24px;font-size:14px}
.pt-blog-nav a{color:#fff;text-decoration:none}
.pt-blog-nav a:hover,.pt-blog-nav a[aria-current="page"]{color:var(--ptb-gold)}
.pt-blog-main{min-height:65vh}
.pt-blog-intro{padding:70px 0 64px;background:var(--ptb-navy);color:#fff;border-bottom:4px solid var(--ptb-gold)}
.pt-blog-intro .pt-blog-shell{max-width:820px;text-align:center}
.pt-blog-eyebrow{margin:0 0 10px;color:var(--ptb-gold);font-size:12px;font-weight:700}
.pt-blog-intro h1{margin:0;color:#fff;font-size:clamp(32px,5vw,54px);font-weight:600;line-height:1.35}
.pt-blog-intro p:last-child{max-width:720px;margin:18px auto 0;font-size:clamp(14px,2vw,17px)}
.pt-blog-content{padding:44px 0 76px}
.pt-blog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.pt-blog-card{min-width:0;background:var(--ptb-paper);border-top:3px solid var(--ptb-gold);box-shadow:0 10px 28px rgba(13,30,51,.09)}
.pt-blog-card__media{display:grid;place-items:center;aspect-ratio:16/9;overflow:hidden;background:var(--ptb-navy);color:var(--ptb-gold);font-size:26px;font-style:normal;font-weight:700;text-decoration:none}
.pt-blog-card__media img{display:block;width:100%;height:100%;object-fit:cover}
.pt-blog-card__body{padding:22px}
.pt-blog-meta{display:flex;flex-wrap:wrap;gap:5px 12px;color:#5f6874;font-size:12px;line-height:1.5}
.pt-blog-meta a{color:var(--ptb-green);text-decoration:none}
.pt-blog-card h2{margin:12px 0 10px;font-size:21px;line-height:1.55}
.pt-blog-card h2 a{text-decoration:none}
.pt-blog-card p{margin:0;color:#3f4b5a;font-size:14px;line-height:1.85}
.pt-blog-readmore{display:inline-flex;margin-top:18px;color:var(--ptb-gold-dark)!important;font-size:14px;font-weight:700;text-decoration:none}
.pt-blog-empty{max-width:720px;margin:24px auto;padding:52px 28px;background:#fff;border-top:3px solid var(--ptb-gold);text-align:center}
.pt-blog-empty h2{margin:0 0 10px;font-size:26px}
.pt-blog-empty p{margin:0;color:#4d5865}
.pt-blog-pagination{display:flex;justify-content:center;gap:8px;margin-top:44px}
.pt-blog-pagination .page-numbers{display:grid;place-items:center;min-width:40px;min-height:40px;padding:4px 10px;background:#fff;text-decoration:none}
.pt-blog-pagination .current{background:var(--ptb-navy);color:#fff}
.pt-blog-article__header{padding:56px 0 0;background:#fff}
.pt-blog-article__narrow{width:min(820px,calc(100% - 40px));margin-right:auto;margin-left:auto}
.pt-blog-back{display:inline-flex;margin-bottom:24px;color:var(--ptb-green)!important;font-size:14px;text-decoration:none}
.pt-blog-article h1{margin:16px 0 34px;font-size:clamp(30px,5vw,48px);font-weight:600;line-height:1.5}
.pt-blog-article__hero{width:min(1000px,calc(100% - 40px));margin:0 auto;aspect-ratio:16/9;overflow:hidden;background:var(--ptb-navy)}
.pt-blog-article__hero img{display:block;width:100%;height:100%;object-fit:cover}
.pt-blog-article__body{padding-top:52px;padding-bottom:54px;font-size:17px;line-height:2}
.pt-blog-article__body>p:first-child{margin-top:0}
.pt-blog-article__body h2{margin:2.4em 0 .8em;padding:0 0 9px;border-bottom:2px solid var(--ptb-gold);font-size:28px;line-height:1.5}
.pt-blog-article__body h3{margin:2em 0 .7em;padding-left:13px;border-left:4px solid var(--ptb-green);font-size:22px;line-height:1.55}
.pt-blog-article__body img{max-width:100%;height:auto}
.pt-blog-article__body a{color:var(--ptb-green)}
.pt-blog-article__body blockquote{margin:2em 0;padding:20px 24px;background:#eef5f2;border-left:4px solid var(--ptb-green)}
.pt-blog-article__footer{padding-bottom:76px}
.pt-blog-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px}
.pt-blog-tags a{padding:4px 10px;background:#e7ebef;font-size:13px;text-decoration:none}
.pt-blog-footer{padding:40px 0 calc(40px + env(safe-area-inset-bottom));background:var(--ptb-navy-deep);color:#fff;text-align:center}
.pt-blog-footer p{margin:24px 0 0}
.pt-blog-footer p a{color:#fff;text-decoration:none}
.pt-blog-footer__cta{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:10px 26px;background:linear-gradient(180deg,#e5c46e,#b98123);color:var(--ptb-navy-deep)!important;font-weight:700;text-decoration:none}
@media(max-width:860px){.pt-blog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.pt-blog-shell,.pt-blog-article__narrow,.pt-blog-article__hero{width:calc(100% - 32px)}.pt-blog-header__inner{min-height:70px}.pt-blog-brand{font-size:20px}.pt-blog-nav{gap:14px;font-size:13px}.pt-blog-intro{padding:52px 0 48px}.pt-blog-content{padding-top:30px}.pt-blog-grid{grid-template-columns:1fr;gap:18px}.pt-blog-article__header{padding-top:36px}.pt-blog-article h1{margin-bottom:26px}.pt-blog-article__body{padding-top:36px;font-size:16px}.pt-blog-article__body h2{font-size:24px}.pt-blog-article__body h3{font-size:20px}}