:root{
  --bn-cream:#FBF8F1;
  --bn-cream-soft:#F4EFE3;
  --bn-indigo:#1E2A52;
  --bn-indigo-soft:#2C3A6A;
  --bn-amber:#D49B2D;
  --bn-amber-soft:#E6B655;
  --bn-text:#5C5A55;
  --bn-text-strong:#2A2A28;
  --bn-line:#E7E1D2;
  --bn-white:#FFFFFF;
  --bn-shadow-soft:0 2px 6px rgba(30,42,82,.06), 0 8px 24px rgba(30,42,82,.06);
  --bn-shadow-lift:0 4px 12px rgba(30,42,82,.08), 0 16px 36px rgba(30,42,82,.08);
  --bn-radius:12px;
  --bn-radius-lg:18px;
  --bn-serif:"Noto Serif JP", "Yu Mincho", serif;
  --bn-sans:"Noto Sans JP", "Hiragino Sans", sans-serif;
  --bn-maxw:1200px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bn-cream);color:var(--bn-text);font-family:var(--bn-sans);line-height:1.75;-webkit-font-smoothing:antialiased}
body{overflow-x:hidden}
img{max-width:100%;display:block;height:auto}
a{color:var(--bn-indigo);text-decoration:none;transition:color .15s ease}
a:hover{color:var(--bn-amber)}
h1,h2,h3,h4{font-family:var(--bn-serif);color:var(--bn-text-strong);line-height:1.4;margin:0 0 .6em}
h1{font-size:clamp(1.8rem,3.4vw,2.6rem);letter-spacing:.02em}
h2{font-size:clamp(1.4rem,2.4vw,1.8rem);letter-spacing:.02em}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.container{max-width:var(--bn-maxw);margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--bn-indigo);color:var(--bn-white);padding:8px 12px;z-index:9999}
.skip-link:focus{left:8px;top:8px}
.site-header{background:rgba(251,248,241,.95);backdrop-filter:saturate(140%) blur(6px);border-bottom:1px solid var(--bn-line);position:sticky;top:0;z-index:50}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;padding:18px 0;gap:20px;flex-wrap:wrap}
.site-logo{display:flex;flex-direction:column;align-items:center;gap:2px;text-align:center;flex:1 1 auto}
.site-logo__title{font-family:var(--bn-serif);font-size:1.1rem;font-weight:700;color:var(--bn-indigo);letter-spacing:.06em}
.site-logo__sub{font-size:.72rem;color:var(--bn-text);letter-spacing:.12em}
.nav-list{display:flex;list-style:none;gap:22px;margin:0;padding:0;align-items:center;flex-wrap:wrap;justify-content:center}
.nav-list a{font-size:.9rem;color:var(--bn-text-strong);font-weight:500;padding:6px 2px;position:relative}
.nav-dropdown{position:relative}
.nav-dropdown__menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);background:var(--bn-white);border:1px solid var(--bn-line);border-radius:var(--bn-radius);min-width:280px;padding:10px 0;box-shadow:var(--bn-shadow-lift);opacity:0;visibility:hidden;transition:.18s ease;list-style:none;margin:6px 0 0;z-index:60}
.nav-dropdown:hover .nav-dropdown__menu,
.nav-dropdown:focus-within .nav-dropdown__menu{opacity:1;visibility:visible}
.nav-dropdown__menu li{padding:0}
.nav-dropdown__menu a{display:block;padding:8px 18px;font-size:.85rem;color:var(--bn-text);white-space:nowrap}
.nav-dropdown__menu a:hover{background:var(--bn-cream-soft);color:var(--bn-indigo)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:var(--bn-radius);font-weight:600;font-size:.9rem;line-height:1.35;cursor:pointer;border:1px solid transparent;transition:transform .15s ease, box-shadow .15s ease, background .15s ease;text-align:center;white-space:normal}
.btn--primary{background:var(--bn-indigo);color:var(--bn-white)}
.btn--primary:hover{background:var(--bn-indigo-soft);color:var(--bn-white);transform:translateY(-1px);box-shadow:var(--bn-shadow-soft)}
.btn--ghost{background:transparent;color:var(--bn-indigo);border-color:var(--bn-indigo)}
.btn--ghost:hover{background:var(--bn-indigo);color:var(--bn-white)}
.btn--amber{background:var(--bn-amber);color:#2A1F00}
.btn--amber:hover{background:var(--bn-amber-soft);color:#2A1F00;transform:translateY(-1px)}
.hero{position:relative;min-height:520px;display:flex;align-items:center;background-image:linear-gradient(135deg, rgba(30,42,82,.78), rgba(30,42,82,.55)), url('../img/home-hero.jpg');background-size:cover;background-position:center;color:var(--bn-white);padding:90px 0}
.hero h1{color:var(--bn-white);max-width:780px}
.hero p.lede{color:rgba(255,255,255,.92);max-width:700px;font-size:1.05rem}
.hero__bento{display:grid;grid-template-columns:repeat(4, 1fr);gap:14px;margin-top:36px;max-width:780px}
.hero__tile{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--bn-radius);padding:14px 16px;backdrop-filter:blur(4px)}
.hero__tile.large{grid-column:span 2;grid-row:span 2}
.hero__tile h4{color:var(--bn-white);margin:0 0 4px;font-family:var(--bn-sans);font-size:.85rem;letter-spacing:.06em}
.hero__tile span{font-family:var(--bn-serif);font-size:1.4rem;color:var(--bn-amber-soft)}
.hero__cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.section{padding:84px 0}
.section--alt{background:var(--bn-cream-soft)}
.section__eyebrow{display:inline-block;font-size:.78rem;letter-spacing:.18em;color:var(--bn-amber);text-transform:uppercase;margin-bottom:14px;font-weight:600}
.section__head{max-width:780px;margin-bottom:48px}
.bento-grid{display:grid;grid-template-columns:repeat(6, 1fr);grid-auto-rows:minmax(180px, auto);gap:18px}
.bento-card{background:var(--bn-white);border-radius:var(--bn-radius-lg);overflow:hidden;box-shadow:var(--bn-shadow-soft);transition:transform .2s ease, box-shadow .2s ease;display:flex;flex-direction:column;position:relative}
.bento-card:hover{transform:translateY(-3px);box-shadow:var(--bn-shadow-lift)}
.bento-card__media{position:relative;height:170px;overflow:hidden;background:#E2DCC8}
.bento-card__media img{width:100%;height:100%;object-fit:cover}
.bento-card__body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.bento-card__tag{display:inline-block;font-size:.7rem;letter-spacing:.14em;color:var(--bn-amber);text-transform:uppercase;margin-bottom:10px;font-weight:600}
.bento-card__title{font-family:var(--bn-serif);font-size:1.1rem;color:var(--bn-text-strong);margin:0 0 10px;line-height:1.5}
.bento-card__excerpt{font-size:.88rem;color:var(--bn-text);margin-bottom:14px;flex:1}
.bento-card__more{font-size:.82rem;color:var(--bn-indigo);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.bento-card.size-lg{grid-column:span 3;grid-row:span 2}
.bento-card.size-lg .bento-card__media{height:280px}
.bento-card.size-md{grid-column:span 3}
.bento-card.size-sm{grid-column:span 2}
.bento-card.size-mini{grid-column:span 2;background:var(--bn-indigo);color:var(--bn-white)}
.bento-card.size-mini .bento-card__title,
.bento-card.size-mini .bento-card__excerpt,
.bento-card.size-mini .bento-card__more{color:var(--bn-white)}
.bento-card.size-mini .bento-card__tag{color:var(--bn-amber-soft)}
.about-split{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center}
.about-split__photo{border-radius:var(--bn-radius-lg);overflow:hidden;box-shadow:var(--bn-shadow-lift);background:#E2DCC8;aspect-ratio:4/3}
.about-split__photo img{width:100%;height:100%;object-fit:cover}
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.advantage-card{background:var(--bn-white);border-radius:var(--bn-radius-lg);padding:26px 24px;box-shadow:var(--bn-shadow-soft);border-top:3px solid var(--bn-amber)}
.advantage-card .icon-wrap{width:46px;height:46px;border-radius:12px;background:var(--bn-cream-soft);color:var(--bn-indigo);display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px}
.advantage-card h3{font-size:1rem;color:var(--bn-indigo);margin-bottom:8px}
.advantage-card p{font-size:.86rem;margin:0}
.mission-block{background:var(--bn-indigo);color:var(--bn-white);border-radius:var(--bn-radius-lg);padding:64px 48px;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.mission-block h2{color:var(--bn-white)}
.mission-block .pillar-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:14px}
.mission-block .pillar-list li{display:flex;gap:12px;align-items:flex-start;font-size:.92rem;color:rgba(255,255,255,.86)}
.mission-block .pillar-list svg{flex-shrink:0;color:var(--bn-amber-soft);margin-top:3px}
.glossary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.glossary-tile{background:var(--bn-white);border-radius:var(--bn-radius);padding:22px;box-shadow:var(--bn-shadow-soft)}
.glossary-tile h4{font-size:1rem;color:var(--bn-indigo);margin:0 0 8px;font-family:var(--bn-serif)}
.glossary-tile p{font-size:.85rem;margin:0;color:var(--bn-text)}
.method-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.method-card{background:var(--bn-white);border-radius:var(--bn-radius);padding:28px;border-left:4px solid var(--bn-indigo)}
.method-card .step{font-family:var(--bn-serif);font-size:.85rem;color:var(--bn-amber);letter-spacing:.18em}
.method-card h3{margin:6px 0 10px;color:var(--bn-text-strong)}
.method-card p{font-size:.88rem;margin:0}
.closing-cta{background:var(--bn-cream-soft);border-radius:var(--bn-radius-lg);padding:64px 48px;text-align:center}
.closing-cta h2{margin-bottom:12px}
.closing-cta p{max-width:620px;margin:0 auto 24px}
.closing-cta__buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.site-footer{background:var(--bn-indigo);color:rgba(255,255,255,.78);padding:56px 0 0;font-size:.88rem}
.footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1.4fr;gap:36px}
.site-footer h4{color:var(--bn-white);font-size:.95rem;margin:0 0 14px;font-family:var(--bn-sans);letter-spacing:.06em}
.site-footer a{color:rgba(255,255,255,.8)}
.site-footer a:hover{color:var(--bn-amber-soft)}
.site-footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.footer-contact p{margin:0 0 6px;line-height:1.6}
.footer-newsletter form{display:flex;flex-direction:column;gap:10px}
.footer-newsletter input[type="email"],
.footer-newsletter input[type="text"]{width:100%;padding:10px 12px;border-radius:8px;border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.06);color:var(--bn-white);font-family:inherit}
.footer-newsletter input[type="email"]::placeholder,
.footer-newsletter input[type="text"]::placeholder{color:rgba(255,255,255,.5)}
.footer-newsletter label{display:flex;gap:8px;align-items:flex-start;font-size:.78rem;color:rgba(255,255,255,.7)}
.footer-newsletter button{margin-top:4px;align-self:flex-start}
.footer-bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:.78rem;color:rgba(255,255,255,.6);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer-bottom a{color:rgba(255,255,255,.7);font-size:.78rem}
.cookie-banner{position:fixed;left:0;right:0;bottom:0;background:var(--bn-indigo);color:var(--bn-white);padding:18px 24px;z-index:80;box-shadow:0 -8px 24px rgba(0,0,0,.18);display:none}
.cookie-banner.is-visible{display:block}
.cookie-banner__inner{max-width:var(--bn-maxw);margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.cookie-banner p{margin:0;font-size:.86rem;flex:1 1 360px}
.cookie-banner__actions{display:flex;gap:10px}
.cookie-banner__actions .btn{padding:9px 22px;font-size:.84rem;min-width:120px;justify-content:center}
.modal{position:fixed;inset:0;background:rgba(20,28,52,.55);display:none;align-items:center;justify-content:center;z-index:90;padding:24px}
.modal.is-open{display:flex}
.modal__inner{background:var(--bn-white);border-radius:var(--bn-radius-lg);padding:40px;max-width:480px;width:100%;text-align:center;box-shadow:var(--bn-shadow-lift)}
.modal__inner h3{margin-top:0;color:var(--bn-indigo)}
.modal__inner p{font-size:.92rem;margin-bottom:18px}
.page-header{padding:96px 0 56px;background:var(--bn-cream-soft);border-bottom:1px solid var(--bn-line)}
.page-header h1{margin-bottom:12px}
.page-header p{max-width:740px;color:var(--bn-text)}
.legal-block{background:var(--bn-white);border-radius:var(--bn-radius-lg);padding:48px;box-shadow:var(--bn-shadow-soft)}
.legal-block h2{margin-top:32px;color:var(--bn-indigo);font-size:1.25rem;border-left:4px solid var(--bn-amber);padding-left:14px}
.legal-block h2:first-child{margin-top:0}
.legal-block p, .legal-block li{font-size:.92rem}
.legal-block ul{padding-left:20px}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:start}
.contact-info{background:var(--bn-white);border-radius:var(--bn-radius-lg);padding:36px;box-shadow:var(--bn-shadow-soft)}
.contact-info h2{font-size:1.25rem;color:var(--bn-indigo);margin-bottom:18px}
.contact-info dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:10px 18px;font-size:.92rem}
.contact-info dt{font-weight:600;color:var(--bn-text-strong)}
.contact-info dd{margin:0}
.contact-form{background:var(--bn-white);border-radius:var(--bn-radius-lg);padding:36px;box-shadow:var(--bn-shadow-soft)}
.contact-form h2{font-size:1.25rem;color:var(--bn-indigo);margin-bottom:18px}
.form-row{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.form-row label{font-size:.84rem;font-weight:600;color:var(--bn-text-strong)}
.form-row input,
.form-row textarea{padding:11px 14px;border:1px solid var(--bn-line);border-radius:10px;font-family:inherit;font-size:.92rem;background:var(--bn-cream);transition:border-color .15s ease}
.form-row input:focus,
.form-row textarea:focus{outline:none;border-color:var(--bn-indigo);background:var(--bn-white)}
.form-row textarea{resize:vertical;min-height:120px}
.map-block{margin-top:36px;border-radius:var(--bn-radius-lg);overflow:hidden;box-shadow:var(--bn-shadow-soft)}
.map-block iframe{width:100%;height:360px;border:0;display:block}
.article-hero{padding:84px 0 36px}
.article-hero h1{max-width:820px}
.article-meta{font-size:.84rem;color:var(--bn-text);margin-bottom:8px;letter-spacing:.04em}
.article-cover{margin:24px 0 36px;border-radius:var(--bn-radius-lg);overflow:hidden;box-shadow:var(--bn-shadow-soft);max-height:420px}
.article-cover img{width:100%;height:100%;object-fit:cover;max-height:420px}
.article-body{max-width:780px;margin:0 auto;font-size:1rem;line-height:1.95}
.article-body h2{margin-top:36px;font-size:1.45rem;color:var(--bn-indigo);border-left:4px solid var(--bn-amber);padding-left:14px}
.article-body h3{margin-top:28px;font-size:1.15rem;color:var(--bn-text-strong)}
.article-body p{margin-bottom:1.2em}
.article-body ul{padding-left:22px;margin-bottom:1.2em}
.article-body li{margin-bottom:6px}
.article-pager{display:flex;justify-content:space-between;gap:18px;margin-top:60px;border-top:1px solid var(--bn-line);padding-top:32px;flex-wrap:wrap}
.article-pager a{font-size:.88rem;color:var(--bn-indigo);font-weight:600}
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.article-list .bento-card{grid-column:auto;grid-row:auto}
.glossary-full{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:24px}
@media (max-width: 960px){
  .container{padding:0 20px}
  .section{padding:68px 0}
  .page-header{padding:76px 0 44px}
  .site-header__inner{align-items:stretch;justify-content:center;padding:16px 0}
  .site-logo{width:100%}
  .site-header nav{width:100%}
  .nav-list{gap:12px;justify-content:center}
  .nav-list li{min-width:0}
  .nav-list a{display:flex;align-items:center;justify-content:center;text-align:center}
  .nav-dropdown__menu{min-width:min(280px, calc(100vw - 48px))}
  .bento-grid{grid-template-columns:repeat(2,1fr)}
  .bento-card.size-lg, .bento-card.size-md, .bento-card.size-sm, .bento-card.size-mini{grid-column:span 2;grid-row:auto}
  .bento-card.size-lg .bento-card__media{height:200px}
  .about-split,.contact-grid{grid-template-columns:1fr}
  .mission-block{grid-template-columns:1fr;padding:36px 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .advantages-grid{grid-template-columns:repeat(2,1fr)}
  .method-grid,.glossary-grid,.article-list,.glossary-full{grid-template-columns:1fr}
  .hero{min-height:420px;padding:60px 0}
  .hero__bento{grid-template-columns:repeat(2,1fr);max-width:100%}
  .hero__tile.large{grid-column:span 2;grid-row:auto}
  .closing-cta{padding:40px 24px}
  .legal-block{padding:28px 22px}
}
@media (max-width: 700px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .page-header{padding:64px 0 36px}
  .site-header__inner{gap:14px}
  .nav-list{display:grid;grid-template-columns:repeat(2, minmax(0, 1fr));align-items:stretch;gap:8px;width:100%}
  .nav-list li{width:100%}
  .nav-list li:last-child{grid-column:1 / -1}
  .nav-list a{width:100%;padding:10px 14px;border-radius:10px;background:rgba(255,255,255,.55)}
  .nav-list .btn{width:100%}
  .nav-dropdown__menu{display:none}
  .hero{min-height:auto;padding:52px 0}
  .hero p.lede{font-size:.98rem}
  .hero__bento{grid-template-columns:1fr;gap:12px}
  .hero__tile,.hero__tile.large{grid-column:auto;grid-row:auto}
  .hero__tile span{font-size:1.2rem}
  .hero__cta,.closing-cta__buttons,.cookie-banner__actions{flex-direction:column}
  .hero__cta .btn,.closing-cta__buttons .btn,.cookie-banner__actions .btn{width:100%}
  .bento-grid,.advantages-grid,.glossary-grid,.method-grid,.article-list,.glossary-full{grid-template-columns:1fr}
  .bento-card.size-lg, .bento-card.size-md, .bento-card.size-sm, .bento-card.size-mini{grid-column:span 1}
  .bento-card__body,.advantage-card,.glossary-tile,.method-card,.contact-info,.contact-form{padding:22px 18px}
  .about-split,.contact-grid{gap:24px}
  .mission-block,.closing-cta{padding:28px 20px}
  .contact-info dl{grid-template-columns:1fr;gap:6px}
  .contact-info dd{margin-bottom:10px}
  .map-block iframe{height:280px}
  .article-hero{padding:60px 0 28px}
  .article-body{font-size:.96rem;line-height:1.82}
  .article-body h2{font-size:1.28rem;margin-top:28px}
  .article-pager{flex-direction:column;gap:12px;margin-top:44px;padding-top:24px}
  .cookie-banner{padding:16px}
  .cookie-banner__inner{align-items:stretch}
  .cookie-banner p{flex-basis:auto}
  .modal{padding:16px}
  .modal__inner{padding:28px 20px}
  .footer-newsletter button{align-self:stretch}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width: 540px){
  .site-logo__title{font-size:1rem}
  .site-logo__sub{font-size:.68rem}
  .nav-list a{font-size:.84rem}
  .hero h1{font-size:clamp(1.65rem,9vw,2.1rem)}
  .page-header h1,.article-hero h1{font-size:clamp(1.55rem,8vw,1.95rem)}
  .hero__tile{padding:12px 14px}
  .bento-card__media,.bento-card.size-lg .bento-card__media{height:180px}
  .legal-block{padding:24px 18px}
  .legal-block h2{font-size:1.12rem;padding-left:12px}
}