/* SEIRYO Theme Builder frontend */
.stb-page{--stb-gap:clamp(28px,4vw,64px)}
.stb-page .sl-section{padding:clamp(72px,9vw,144px) 0}
.stb-page .sl-section--gray{background:#f5f5f2}
.stb-page .sl-heading{margin-bottom:clamp(32px,5vw,72px)}
.stb-page .sl-heading__sub{display:block;font:800 13px/1.2 Montserrat,sans-serif;letter-spacing:.16em;margin-bottom:14px}
.stb-page .sl-heading__sub:before{content:"";display:inline-block;width:34px;height:4px;background:var(--sl-yellow,#fff200);margin-right:12px;vertical-align:middle}
.stb-page .sl-heading h2{font-size:clamp(34px,5vw,72px);line-height:1.12;margin:0}
.stb-lead__text,.stb-gallery__intro{max-width:900px;font-size:clamp(17px,1.5vw,21px);line-height:2}
.stb-lead__image{margin-top:clamp(36px,6vw,90px);overflow:hidden;border-radius:16px}
.stb-lead__image img{width:100%;aspect-ratio:16/9;object-fit:cover}
.stb-feature{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:var(--stb-gap);align-items:center}
.stb-feature.is-image-right .stb-feature__image{order:2}
.stb-feature__image img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:14px}
.stb-feature__content{font-size:17px;line-height:1.95}
.stb-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.stb-card-grid.is-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.stb-card{display:block;background:#fff;color:inherit;text-decoration:none;border-radius:14px;overflow:hidden;box-shadow:0 12px 36px rgba(17,20,17,.07);transition:transform .25s,box-shadow .25s}
a.stb-card:hover{transform:translateY(-6px);box-shadow:0 20px 50px rgba(17,20,17,.14)}
.stb-card__image img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .35s}
a.stb-card:hover .stb-card__image img{transform:scale(1.035)}
.stb-card__body{padding:28px}.stb-card__body h3{font-size:24px;margin:0 0 14px}.stb-card__body p{line-height:1.8}
.stb-gallery-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:42px}
.stb-gallery-grid figure{grid-column:span 4;margin:0}.stb-gallery-grid figure:first-child{grid-column:span 8;grid-row:span 2}
.stb-gallery-grid img{width:100%;height:100%;min-height:260px;aspect-ratio:4/3;object-fit:cover;border-radius:12px}.stb-gallery-grid figcaption{padding:10px 2px;font-size:14px}
.stb-faq-list{max-width:1000px}.stb-faq-list details{background:#fff;border-bottom:1px solid #ddd;padding:0 26px}.stb-faq-list summary{cursor:pointer;font-weight:700;font-size:19px;padding:24px 36px 24px 0;position:relative}.stb-faq-list summary:after{content:"＋";position:absolute;right:0}.stb-faq-list details[open] summary:after{content:"−"}.stb-faq-list details>div{padding:0 0 24px;line-height:1.85}
.stb-cta{background:var(--sl-yellow,#fff200);background-size:cover;background-position:center;text-align:center}.stb-cta[style]{color:#fff}.stb-cta .sl-heading{margin-bottom:22px}.stb-cta .sl-button{margin-top:22px}
.stb-placeholder{width:100%;aspect-ratio:16/9;border:2px dashed #b7b7b2;background:#f2f2ef;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#666;border-radius:12px;gap:8px}.stb-placeholder span{font-size:44px}.stb-placeholder strong{font-size:16px}.stb-placeholder small{color:#888}
@media(max-width:900px){.stb-feature{grid-template-columns:1fr}.stb-feature.is-image-right .stb-feature__image{order:0}.stb-card-grid,.stb-card-grid.is-2{grid-template-columns:1fr 1fr}.stb-gallery-grid figure,.stb-gallery-grid figure:first-child{grid-column:span 6;grid-row:auto}}
@media(max-width:600px){.stb-card-grid,.stb-card-grid.is-2{grid-template-columns:1fr}.stb-gallery-grid{display:block}.stb-gallery-grid figure{margin-bottom:18px}}