:root{
  --bg:#eaf4ff;
  --bg2:#cfe8ff;
  --line:rgba(15,23,42,.10);
  --text:#0b1630;
  --muted:rgba(11,22,48,.72);
  --shadow: 0 16px 50px rgba(2, 28, 80, .18);
  --radius: 18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 900px at 15% 15%, rgba(37,99,235,.22), transparent 55%),
    radial-gradient(900px 700px at 80% 10%, rgba(2,132,199,.16), transparent 55%),
    radial-gradient(900px 700px at 40% 85%, rgba(56,189,248,.20), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  line-height:1.7;
}
a{color:inherit}
.container{width:min(1120px, 92vw); margin:0 auto}

.header{position:sticky; top:0; z-index:50; backdrop-filter: blur(14px); background: rgba(234,244,255,.74); border-bottom: 1px solid var(--line)}
.nav{display:flex; align-items:center; justify-content:space-between; padding:14px 0}
.brand{display:flex; align-items:center; gap:10px; text-decoration:none}
.brand img{width:34px; height:34px}
.brand .title{font-weight:900; letter-spacing:.04em}
.brand .sub{font-size:12px; color:var(--muted); margin-top:-2px; font-family:"Segoe Script","Brush Script MT","Lucida Handwriting",cursive; font-weight:600}

.navlinks{display:flex; gap:18px; align-items:center}
.navlinks a{opacity:.9; text-decoration:none; font-size:14px}
.navlinks a:hover{opacity:1}

.cta{display:inline-flex; align-items:center; gap:8px; padding:10px 14px; border-radius:999px; border:1px solid rgba(37,99,235,.25); background: linear-gradient(135deg, rgba(37,99,235,.22), rgba(56,189,248,.18)); box-shadow: 0 10px 26px rgba(37,99,235,.14); text-decoration:none; font-weight:900; white-space:nowrap}
.cta:hover{transform: translateY(-1px)}

.menuBtn{display:none; border:1px solid var(--line); background:rgba(255,255,255,.88); color:var(--text); padding:10px 12px; border-radius:12px; cursor:pointer}

.mobilePanel{display:none; padding:10px 0 16px}
.mobilePanel.is-open{display:block}
.mobilePanel a{display:block; padding:10px 12px; border-radius:12px; text-decoration:none; border:1px solid transparent}
.mobilePanel a:hover{background:rgba(255,255,255,.75); border-color:var(--line)}

.hero{padding:28px 0 12px}
.heroGrid{display:grid; gap:22px; grid-template-columns: 1.1fr .9fr; align-items:stretch}
.heroCard{position:relative; border:1px solid var(--line); background: linear-gradient(180deg, rgba(255,255,255,.82), rgba(255,255,255,.66)); border-radius: var(--radius); box-shadow: var(--shadow); overflow:hidden}
.heroCopy{padding:28px}
.kicker{display:inline-flex; gap:8px; align-items:center; padding:6px 10px; border-radius:999px; border:1px solid rgba(37,99,235,.22); background: rgba(37,99,235,.10); color: rgba(11,22,48,.92); font-size:12px}
.h1{font-size:42px; line-height:1.2; margin:14px 0 10px; font-weight:1000; letter-spacing:.02em}
.lead{color:var(--muted); font-size:16px; margin:0 0 18px}
.badges{display:flex; flex-wrap:wrap; gap:10px; margin:18px 0 0}
.badge{font-size:12px; color:rgba(11,22,48,.88); border:1px solid var(--line); background: rgba(255,255,255,.72); padding:7px 10px; border-radius:999px}
.heroActions{display:flex; gap:12px; flex-wrap:wrap; margin-top:18px}
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:12px 14px; border-radius: 14px; border:1px solid var(--line); background: rgba(255,255,255,.72); text-decoration:none; font-weight:1000}
.btn.primary{border-color: rgba(37,99,235,.35); background: linear-gradient(135deg, rgba(37,99,235,.26), rgba(56,189,248,.18))}
.btn:hover{transform: translateY(-1px)}

.heroPhoto{min-height: 420px; background: radial-gradient(900px 520px at 60% 20%, rgba(37,99,235,.12), transparent 60%), radial-gradient(680px 480px at 30% 80%, rgba(2,132,199,.10), transparent 60%), linear-gradient(180deg, rgba(255,255,255,.40), rgba(234,244,255,.70))}
.heroPhoto .caption{position:absolute; left:18px; right:18px; bottom:16px; padding:12px 14px; border-radius: 16px; border:1px solid var(--line); background: rgba(255,255,255,.78)}
.caption b{display:block; font-size:14px}
.caption span{display:block; font-size:12px; color:var(--muted)}

.heroThumb{all: unset; display:block; width:100%; height:100%; cursor: zoom-in}
.heroThumb img{width:100%; height:100%; object-fit:cover; display:block}

section{padding:48px 0}
.sectionTitle{display:flex; align-items:flex-end; justify-content:space-between; gap:18px; margin-bottom:18px}
.sectionTitle h2{margin:0; font-size:26px; font-weight:1000}
.sectionTitle p{margin:0; color:var(--muted); font-size:14px; max-width:60ch}

.grid3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
.grid2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
.card{border:1px solid var(--line); background: linear-gradient(180deg, rgba(255,255,255,.82), rgba(255,255,255,.66)); border-radius: var(--radius); padding:18px; box-shadow: 0 12px 36px rgba(2, 28, 80, .10)}
.card h3{margin:0 0 6px; font-size:16px; font-weight:1000}
.card p{margin:0; color:var(--muted); font-size:14px}

.priceGrid{display:grid; gap:16px; grid-template-columns: repeat(12, 1fr)}
.price{grid-column: span 6; border:1px solid rgba(37,99,235,.22); background: linear-gradient(135deg, rgba(37,99,235,.12), rgba(56,189,248,.10))}
.price .row{display:flex; align-items:flex-start; justify-content:space-between; gap:12px}
.price .yen{font-weight:1100; font-size:22px; letter-spacing:.02em}

.notice{border:1px dashed rgba(37,99,235,.35); background: rgba(37,99,235,.06)}

.gallery{display:grid; grid-template-columns: repeat(12, 1fr); gap:12px}
.gallery .thumb{grid-column: span 4; width:100%; display:block; border-radius:16px; overflow:hidden; border:1px solid var(--line); background:rgba(255,255,255,.60); padding:0; cursor: zoom-in; -webkit-tap-highlight-color: transparent; touch-action: manipulation}
.gallery .thumb img{width:100%; height:220px; object-fit:cover; display:block}

@media (max-width: 900px){
  .heroGrid{grid-template-columns: 1fr}
  .heroPhoto{min-height: 320px}
  .h1{font-size: 36px}
  .grid3{grid-template-columns: 1fr}
  .grid2{grid-template-columns: 1fr}
  .price{grid-column: span 12}
  .gallery .thumb{grid-column: span 6}
  .navlinks{display:none}
  .menuBtn{display:inline-flex; align-items:center; gap:8px}
}
@media (max-width: 520px){
  .h1{font-size: 30px}
  .heroCopy{padding:20px}
  .gallery .thumb{grid-column: span 12}
  .gallery .thumb img{height: 240px}
}

/* Lightbox */
.lightbox{position: fixed; inset: 0; display: none; align-items: center; justify-content: center; padding: 18px; background: rgba(2, 12, 40, .60); z-index: 1000;}
.lightbox[data-open="1"]{display:flex}
.lightbox__panel{width: min(980px, 96vw); max-height: 92vh; border-radius: 18px; overflow: hidden; border: 1px solid rgba(255,255,255,.25); background: rgba(255,255,255,.94); box-shadow: 0 20px 80px rgba(0,0,0,.35)}
.lightbox__header{display:flex; align-items:center; justify-content: space-between; gap: 10px; padding: 12px 14px; border-bottom: 1px solid rgba(15,23,42,.12)}
.lightbox__title{font-weight: 1000; color: #0b1630}
.lightbox__desc{font-size: 12px; color: rgba(11,22,48,.72); margin-top: 2px}
.lightbox__close{border: 1px solid rgba(15,23,42,.14); background: rgba(255,255,255,.90); color: #0b1630; border-radius: 12px; padding: 10px 12px; cursor: pointer; font-weight: 1000}
.lightbox__body{background: rgba(2,132,199,.05)}
.lightbox__img{display:block; width: 100%; height: auto; max-height: calc(92vh - 64px); object-fit: contain}


/* SEO/Conversion enhancement */
@media (max-width: 640px){
  .line-fixed{right:14px !important; bottom:14px !important;}
  .line-fixed a{padding:12px 18px !important; font-size:14px;}
}