:root{
  --bn-ink:#1f1b16;
  --bn-ink-soft:#4a433b;
  --bn-paper:#fbf8f1;
  --bn-paper-soft:#f3eee2;
  --bn-line:#d9d1bf;
  --bn-line-soft:#ebe3d0;
  --bn-gold:#b48a3a;
  --bn-gold-soft:#d7b773;
  --bn-focus:#8a6a2a;
  --bn-white:#ffffff;
  --bn-shadow:0 1px 0 rgba(31,27,22,0.04);
  --bn-serif:"Shippori Mincho","Noto Serif JP",serif;
  --bn-sans:"Sawarabi Gothic","Noto Sans JP",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bn-paper);color:var(--bn-ink);font-family:var(--bn-sans);line-height:1.85;font-size:16px}
body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4{font-family:var(--bn-serif);font-weight:500;color:var(--bn-ink);letter-spacing:0.02em;margin:0 0 0.6em}
h1{font-size:2.1rem;line-height:1.4}
h2{font-size:1.55rem;line-height:1.5;margin-top:2.4em}
h3{font-size:1.2rem;line-height:1.55;margin-top:1.8em}
p{margin:0 0 1.1em;color:var(--bn-ink-soft)}
a{color:var(--bn-focus);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s ease,color .2s ease}
a:hover{color:var(--bn-gold);border-bottom-color:var(--bn-gold-soft)}
img{max-width:100%;height:auto;display:block}
.bn-container{max-width:880px;margin:0 auto;padding:0 24px}
.bn-container-wide{max-width:1080px;margin:0 auto;padding:0 24px}
.bn-header{background:var(--bn-paper);border-bottom:1px solid var(--bn-line-soft);position:sticky;top:0;z-index:50}
.bn-header-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;max-width:1080px;margin:0 auto}
.bn-logo{font-family:var(--bn-serif);font-size:1.15rem;color:var(--bn-ink);letter-spacing:0.06em;border:none}
.bn-logo-sub{display:block;font-family:var(--bn-sans);font-size:0.72rem;color:var(--bn-ink-soft);letter-spacing:0.14em;margin-top:2px}
.bn-nav{display:flex;align-items:center;gap:28px}
.bn-nav-list{display:flex;gap:24px;list-style:none;margin:0;padding:0}
.bn-nav-list a{color:var(--bn-ink);font-size:0.92rem;border:none}
.bn-nav-list a:hover{color:var(--bn-gold)}
.bn-nav-cta{border:1px solid var(--bn-ink);color:var(--bn-ink);padding:9px 18px;font-size:0.85rem;letter-spacing:0.08em;border-bottom:1px solid var(--bn-ink)}
.bn-nav-cta:hover{background:var(--bn-ink);color:var(--bn-paper);border-color:var(--bn-ink)}
.bn-nav-toggle{display:none;background:none;border:none;font-size:1.6rem;color:var(--bn-ink);cursor:pointer;padding:4px 8px}
.bn-hero{padding:92px 0 72px;border-bottom:1px solid var(--bn-line-soft)}
.bn-hero-eyebrow{font-size:0.8rem;letter-spacing:0.28em;color:var(--bn-gold);text-transform:uppercase;margin-bottom:22px}
.bn-hero h1{font-size:2.6rem;line-height:1.35;margin-bottom:20px}
.bn-hero-sub{font-size:1.05rem;color:var(--bn-ink-soft);max-width:640px;margin-bottom:36px}
.bn-hero-actions{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.bn-btn-primary{display:inline-block;border:1px solid var(--bn-ink);background:var(--bn-ink);color:var(--bn-paper);padding:13px 28px;font-size:0.9rem;letter-spacing:0.12em;border-bottom:1px solid var(--bn-ink)}
.bn-btn-primary:hover{background:var(--bn-gold);border-color:var(--bn-gold);color:var(--bn-paper)}
.bn-btn-ghost{display:inline-block;border:1px solid var(--bn-ink-soft);color:var(--bn-ink);padding:13px 28px;font-size:0.9rem;letter-spacing:0.12em;background:transparent;border-bottom:1px solid var(--bn-ink-soft)}
.bn-btn-ghost:hover{border-color:var(--bn-gold);color:var(--bn-gold)}
.bn-hero-visual{margin-top:56px;border-top:1px solid var(--bn-line-soft);padding-top:56px}
.bn-hero-visual img{width:100%;max-height:440px;object-fit:cover}
.bn-section{padding:88px 0;border-bottom:1px solid var(--bn-line-soft)}
.bn-section-eyebrow{font-size:0.78rem;letter-spacing:0.28em;color:var(--bn-gold);text-transform:uppercase;margin-bottom:16px}
.bn-section h2{font-size:1.9rem;margin-top:0}
.bn-two-col{display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:start}
.bn-two-col img{width:100%;max-height:420px;object-fit:cover}
.bn-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:40px}
.bn-article-item{border-top:1px solid var(--bn-line);padding-top:24px}
.bn-article-item h3{font-size:1.15rem;line-height:1.55;margin:12px 0}
.bn-article-item h3 a{color:var(--bn-ink);border:none}
.bn-article-item h3 a:hover{color:var(--bn-gold)}
.bn-article-meta{font-size:0.78rem;letter-spacing:0.16em;color:var(--bn-gold);text-transform:uppercase}
.bn-article-excerpt{font-size:0.93rem;color:var(--bn-ink-soft);margin-bottom:14px}
.bn-article-more{font-size:0.85rem;letter-spacing:0.08em;color:var(--bn-ink);border-bottom:1px solid var(--bn-line)}
.bn-advantages{margin-top:40px}
.bn-advantage-row{display:grid;grid-template-columns:64px 1fr;gap:28px;padding:28px 0;border-top:1px solid var(--bn-line-soft)}
.bn-advantage-row:last-child{border-bottom:1px solid var(--bn-line-soft)}
.bn-advantage-num{font-family:var(--bn-serif);font-size:1.6rem;color:var(--bn-gold);letter-spacing:0.05em}
.bn-advantage-body h3{margin:0 0 8px;font-size:1.15rem}
.bn-advantage-body p{margin:0;font-size:0.95rem}
.bn-faq{margin-top:40px}
.bn-faq-item{border-top:1px solid var(--bn-line-soft);padding:22px 0}
.bn-faq-item:last-child{border-bottom:1px solid var(--bn-line-soft)}
.bn-faq-q{display:flex;align-items:center;justify-content:space-between;cursor:pointer;font-family:var(--bn-serif);font-size:1.08rem;color:var(--bn-ink);gap:20px}
.bn-faq-q .material-icons{color:var(--bn-gold);transition:transform .25s ease}
.bn-faq-item.is-open .bn-faq-q .material-icons{transform:rotate(45deg)}
.bn-faq-a{display:none;margin-top:14px;font-size:0.95rem;color:var(--bn-ink-soft)}
.bn-faq-item.is-open .bn-faq-a{display:block}
.bn-cta-band{background:var(--bn-paper-soft);padding:80px 0;text-align:center}
.bn-cta-band h2{margin-top:0}
.bn-cta-band p{max-width:620px;margin:0 auto 30px}
.bn-footer{background:var(--bn-ink);color:var(--bn-paper);padding:64px 0 24px;font-family:var(--bn-sans)}
.bn-footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;max-width:1080px;margin:0 auto;padding:0 24px}
.bn-footer h4{color:var(--bn-paper);font-family:var(--bn-serif);font-size:1rem;letter-spacing:0.12em;margin-bottom:20px}
.bn-footer p,.bn-footer a,.bn-footer li{color:var(--bn-paper-soft);font-size:0.88rem}
.bn-footer a{border:none}
.bn-footer a:hover{color:var(--bn-gold-soft)}
.bn-footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.bn-footer-contact-item{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px}
.bn-footer-contact-item .material-icons{color:var(--bn-gold-soft);font-size:20px;margin-top:2px}
.bn-footer-bottom{max-width:1080px;margin:48px auto 0;padding:20px 24px 0;border-top:1px solid rgba(251,248,241,0.12);text-align:center;font-size:0.8rem;color:var(--bn-paper-soft);letter-spacing:0.08em}
.bn-page-hero{padding:72px 0 48px;border-bottom:1px solid var(--bn-line-soft)}
.bn-page-hero h1{margin:0 0 14px}
.bn-breadcrumb{font-size:0.78rem;letter-spacing:0.16em;color:var(--bn-gold);text-transform:uppercase;margin-bottom:18px}
.bn-breadcrumb a{color:var(--bn-gold);border:none}
.bn-contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:start}
.bn-contact-info-item{display:grid;grid-template-columns:44px 1fr;gap:16px;padding:22px 0;border-top:1px solid var(--bn-line-soft)}
.bn-contact-info-item:last-child{border-bottom:1px solid var(--bn-line-soft)}
.bn-contact-info-item .material-icons{color:var(--bn-gold);font-size:26px;margin-top:2px}
.bn-contact-info-item h3{margin:0 0 4px;font-size:1rem}
.bn-contact-info-item p{margin:0;font-size:0.9rem}
.bn-form{background:var(--bn-white);border:1px solid var(--bn-line);padding:36px}
.bn-form h2{margin-top:0;font-size:1.3rem}
.bn-form label{display:block;font-size:0.85rem;color:var(--bn-ink);margin-bottom:8px;letter-spacing:0.06em}
.bn-form input[type="text"],.bn-form input[type="email"],.bn-form textarea{width:100%;border:1px solid var(--bn-line);background:var(--bn-paper);padding:12px 14px;font-family:var(--bn-sans);font-size:0.95rem;color:var(--bn-ink);margin-bottom:20px}
.bn-form input:focus,.bn-form textarea:focus{outline:none;border-color:var(--bn-gold);background:var(--bn-white)}
.bn-form textarea{min-height:140px;resize:vertical}
.bn-form-check{display:flex;gap:10px;align-items:flex-start;margin-bottom:24px;font-size:0.85rem;color:var(--bn-ink-soft)}
.bn-form-check input{margin-top:4px}
.bn-form button{background:var(--bn-ink);color:var(--bn-paper);border:none;padding:14px 32px;font-size:0.9rem;letter-spacing:0.12em;font-family:var(--bn-sans);cursor:pointer}
.bn-form button:hover{background:var(--bn-gold)}
.bn-form-error{color:#a33;font-size:0.82rem;margin-top:-14px;margin-bottom:14px;display:none}
.bn-form-error.is-visible{display:block}
.bn-map{margin-top:64px;border-top:1px solid var(--bn-line-soft);padding-top:48px}
.bn-map iframe{width:100%;height:420px;border:1px solid var(--bn-line);display:block}
.bn-map-link{margin-top:16px;font-size:0.88rem}
.bn-modal{position:fixed;inset:0;background:rgba(31,27,22,0.5);display:none;align-items:center;justify-content:center;z-index:1000;padding:20px}
.bn-modal.is-visible{display:flex}
.bn-modal-content{background:var(--bn-paper);max-width:440px;width:100%;padding:36px;text-align:center}
.bn-modal-content h3{margin-top:0}
.bn-modal-content button{background:var(--bn-ink);color:var(--bn-paper);border:none;padding:12px 28px;font-family:var(--bn-sans);font-size:0.88rem;letter-spacing:0.1em;cursor:pointer;margin-top:20px}
.bn-cookie-bar{position:fixed;bottom:0;left:0;right:0;background:var(--bn-ink);color:var(--bn-paper);padding:20px 24px;z-index:900;display:none;flex-wrap:wrap;align-items:center;justify-content:center;gap:20px}
.bn-cookie-bar.is-visible{display:flex}
.bn-cookie-bar p{color:var(--bn-paper-soft);margin:0;font-size:0.88rem;max-width:640px}
.bn-cookie-actions{display:flex;gap:12px}
.bn-cookie-btn{border:1px solid var(--bn-paper-soft);color:var(--bn-paper);background:transparent;padding:10px 22px;font-family:var(--bn-sans);font-size:0.85rem;letter-spacing:0.08em;cursor:pointer}
.bn-cookie-btn.is-accept{background:var(--bn-gold);border-color:var(--bn-gold);color:var(--bn-ink)}
.bn-cookie-btn:hover{opacity:0.9}
.bn-article-body h2{border-top:1px solid var(--bn-line-soft);padding-top:40px;margin-top:56px}
.bn-article-body h3{margin-top:36px}
.bn-article-body p{font-size:1rem;color:var(--bn-ink-soft)}
.bn-article-hero{margin:32px 0 48px}
.bn-article-hero img{width:100%;max-height:420px;object-fit:cover}
.bn-article-byline{font-size:0.82rem;letter-spacing:0.14em;color:var(--bn-gold);text-transform:uppercase;margin-bottom:8px}
.bn-article-nav{display:flex;justify-content:space-between;gap:24px;margin:72px 0 0;padding-top:32px;border-top:1px solid var(--bn-line-soft);flex-wrap:wrap}
.bn-article-nav a{display:block;max-width:48%;border:none}
.bn-article-nav-label{font-size:0.72rem;letter-spacing:0.2em;color:var(--bn-gold);text-transform:uppercase;margin-bottom:6px}
.bn-article-nav-title{font-family:var(--bn-serif);color:var(--bn-ink);font-size:1rem;line-height:1.5}
.bn-article-nav a:hover .bn-article-nav-title{color:var(--bn-gold)}
.bn-index-list{margin-top:40px}
.bn-index-item{display:grid;grid-template-columns:200px 1fr;gap:40px;padding:32px 0;border-top:1px solid var(--bn-line-soft)}
.bn-index-item:last-child{border-bottom:1px solid var(--bn-line-soft)}
.bn-index-item img{width:100%;aspect-ratio:4/3;object-fit:cover}
.bn-index-item h2{font-size:1.3rem;margin:0 0 10px}
.bn-index-item h2 a{color:var(--bn-ink);border:none}
.bn-index-item h2 a:hover{color:var(--bn-gold)}
.bn-index-item p{font-size:0.93rem;margin-bottom:10px}
.bn-legal h2{font-size:1.3rem;margin-top:3em}
.bn-legal h2:first-of-type{margin-top:0}
.bn-legal p{font-size:0.96rem}
.bn-legal ol,.bn-legal ul{color:var(--bn-ink-soft);padding-left:24px}
.bn-legal li{margin-bottom:8px}
@media (max-width:860px){
  .bn-two-col{grid-template-columns:1fr;gap:36px}
  .bn-grid-3{grid-template-columns:1fr;gap:28px}
  .bn-contact-grid{grid-template-columns:1fr;gap:40px}
  .bn-footer-grid{grid-template-columns:1fr;gap:36px}
  .bn-index-item{grid-template-columns:1fr;gap:20px}
  .bn-hero{padding:64px 0 48px}
  .bn-hero h1{font-size:2rem}
  .bn-section{padding:64px 0}
  .bn-map iframe{height:300px}
  .bn-nav-list{display:none}
  .bn-nav-cta{display:none}
  .bn-nav-toggle{display:block}
  .bn-nav.is-open .bn-nav-list{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--bn-paper);border-top:1px solid var(--bn-line-soft);border-bottom:1px solid var(--bn-line-soft);padding:24px;gap:16px}
  .bn-nav.is-open .bn-nav-cta{display:inline-block;margin:16px 24px 24px}
}