:root{
  --white:#FFFFFF;
  --ink:#111111;
  --gray-bg:#F5F5F3;
  --line:#E4E4E0;
  --line-dark:#111111;
  --text-sub:#55554F;
  --max:1200px;
  --pad:clamp(20px, 4vw, 48px);
  --sec-pc:clamp(72px, 10vw, 160px);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  font-family:'Noto Sans JP','Hiragino Kaku Gothic ProN',sans-serif;
  font-weight:400;
  color:var(--ink);
  background:var(--white);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"palt";
}
.en{font-family:'Inter','Noto Sans JP',sans-serif}
img{display:block;width:100%;max-width:100%;height:auto;object-fit:contain;object-position:center}
picture{display:contents}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

.wrap{max-width:var(--max);margin:0 auto;padding-inline:var(--pad)}

/* ---------- ヘッダー ---------- */
.header{
  position:sticky;top:0;z-index:100;
  background:var(--white);
  border-bottom:1px solid var(--line);
}
.header-in{
  max-width:var(--max);margin:0 auto;padding-inline:var(--pad);
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.logo{display:flex;flex-direction:column;gap:2px;line-height:1.2}
.logo .en{font-size:20px;font-weight:600;letter-spacing:.14em}
.logo-jp{font-size:9px;letter-spacing:.42em;color:var(--text-sub);display:flex;align-items:center;gap:8px}
.logo-jp::before,.logo-jp::after{content:"";height:1px;width:18px;background:var(--text-sub)}
.gnav{display:flex;align-items:center;gap:36px}
.gnav a{font-size:11px;font-weight:500;letter-spacing:.22em;padding:6px 0}
.gnav a:hover{opacity:.55}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-dark);
  font-size:13px;font-weight:500;letter-spacing:.18em;
  padding:12px 30px;
  background:var(--white);color:var(--ink);
  transition:background .25s var(--ease),color .25s var(--ease);
}
.btn:hover{background:var(--ink);color:var(--white)}
.btn-fill{background:var(--ink);color:var(--white)}
.btn-fill:hover{background:var(--white);color:var(--ink)}
.header .btn{padding:10px 24px;font-size:12px}
.menu-btn{display:none}

/* ---------- 共通セクション ---------- */
.sec{padding-block:var(--sec-pc)}
.sec-gray{background:var(--gray-bg)}
.sec + .sec:not(.sec-gray){border-top:1px solid var(--line)}
.eyebrow{
  font-size:11px;font-weight:500;letter-spacing:.3em;
  color:var(--text-sub);margin-bottom:34px;
}
h1,h2{font-weight:500;letter-spacing:.08em;line-height:1.65}
h1{font-size:clamp(25px,3.1vw,38px);letter-spacing:.06em}
h2{font-size:clamp(22px,2.6vw,32px)}
.lead{margin-top:28px;font-size:15px;line-height:2.2;letter-spacing:.06em;color:var(--ink)}
.sec-cta{margin-top:44px}

/* フェードイン */
.fx{opacity:0;transform:translateY(16px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.fx.on{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.fx{opacity:1;transform:none}}

/* ---------- ファーストビュー ---------- */
.hero .wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,6vw,90px);
  align-items:center;
}
.hero-img figure{margin:0}
.hero-img img{width:min(100%,470px);height:auto;margin-inline:auto}
.scale{
  width:min(78%,340px);margin:26px auto 0;
  display:flex;flex-direction:column;gap:8px;align-items:center;
}
.scale-line{position:relative;width:100%;height:1px;background:var(--ink)}
.scale-line::before,.scale-line::after{
  content:"";position:absolute;top:-5px;width:1px;height:11px;background:var(--ink)}
.scale-line::before{left:0}
.scale-line::after{right:0}
.scale-label{font-size:13px;letter-spacing:.2em}

/* ---------- 01 STORY ---------- */
.story-steps{
  margin-top:64px;
  display:grid;grid-template-columns:1fr auto 1.25fr auto 1fr;
  gap:clamp(16px,3vw,40px);align-items:center;
}
.step{display:flex;flex-direction:column;align-items:center;gap:22px}
.step-img{width:100%;height:300px;display:flex;align-items:center;justify-content:center;background:var(--white)}
.step-img img{width:100%;height:100%;object-fit:contain;object-position:center}
.step-cap{font-size:13px;letter-spacing:.14em;display:flex;gap:14px}
.step:nth-child(1) .step-img{max-width:210px}
.step:nth-child(3) .step-img{max-width:300px}
.step:nth-child(5) .step-img{max-width:230px}
.step-cap .num{font-weight:500;letter-spacing:.1em}
.arrow{display:flex;justify-content:center;align-items:center}
.arrow svg{display:block}

/* ---------- 02 PRODUCT LINE ---------- */
.product .wrap{display:grid;grid-template-columns:minmax(280px,380px) 1fr;gap:clamp(40px,5vw,80px);align-items:end}
.product-copy{align-self:center}
.product-row{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:clamp(10px,1.8vw,26px);
}
.p-item{display:flex;flex-direction:column;align-items:center;gap:16px}
.p-unit{
  --cell:clamp(26px,2.6vw,34px);
  border:1px solid #CFCFCA;background:#FBFBF9;padding:3px;
  box-shadow:0 10px 16px -10px rgba(17,17,17,.14);
}
.p-grid{display:grid;gap:2px}
.p-cell{width:var(--cell);height:var(--cell);background:var(--white);border:1px solid var(--line)}
.p-num{font-size:14px;font-weight:500;letter-spacing:.08em}
.product-cta{margin-top:52px;text-align:right}

/* ---------- 03 HOW TO USE ---------- */
.use .wrap{display:grid;grid-template-columns:minmax(280px,380px) 1fr;gap:clamp(40px,5vw,80px);align-items:center}
.use-grid{display:grid;grid-template-columns:repeat(3,1fr)}
.use-item{
  display:flex;flex-direction:column;align-items:center;gap:22px;
  padding-inline:clamp(14px,2vw,30px);
}
.use-item + .use-item{border-left:1px solid var(--line)}
.use-img{width:100%;max-width:300px;height:260px;display:flex;align-items:center;justify-content:center}
.use-img img{width:100%;height:100%;object-fit:contain;object-position:center}
.use-cap{font-size:12px;font-weight:500;letter-spacing:.24em}

/* ---------- 04 HOME PLANNING ---------- */
.plan .wrap{display:grid;grid-template-columns:minmax(280px,380px) 1fr;gap:clamp(40px,5vw,80px);align-items:center}
.plan-row{
  display:grid;grid-template-columns:1fr auto 1fr auto 1fr;
  gap:clamp(12px,2vw,28px);align-items:center;
}
.plan-item{display:flex;flex-direction:column;align-items:center;gap:20px}
.plan-item img{width:100%;max-width:175px;height:auto;border:1px solid var(--line);background:var(--white)}
.plan-cap{font-size:12px;font-weight:500;letter-spacing:.26em}

/* ---------- 最終CTA ---------- */
.last{text-align:center}
.last h2{font-size:clamp(24px,3.4vw,38px)}
.last .btn{margin-top:48px;padding:18px 56px;font-size:14px}

/* ---------- フッター ---------- */
.footer{border-top:1px solid var(--line);padding-block:44px}
.footer-in{
  max-width:var(--max);margin:0 auto;padding-inline:var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.footer .logo .en{font-size:17px}
.fnav{display:flex;gap:30px;flex-wrap:wrap}
.fnav a{font-size:11px;font-weight:500;letter-spacing:.2em}
.fnav a:hover{opacity:.55}
.copy{width:100%;margin-top:20px;font-size:10px;letter-spacing:.14em;color:var(--text-sub)}

.sp-only{display:none}

/* ---------- タブレット ---------- */
@media (max-width:1023px){
  .product .wrap,.use .wrap,.plan .wrap{grid-template-columns:1fr;align-items:start}
  .product-row{flex-wrap:wrap;justify-content:flex-start;gap:34px 40px}
  .product-cta{text-align:left}
  .use-grid{overflow-x:auto;grid-auto-flow:column;grid-template-columns:none;scroll-snap-type:x mandatory;padding-bottom:10px}
  .use-item{scroll-snap-align:start;min-width:240px}
}

/* ---------- スマホ ---------- */
@media (max-width:767px){
  .header-in{height:60px}
  .gnav{
    position:fixed;inset:60px 0 auto 0;z-index:99;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--white);border-bottom:1px solid var(--line);
    display:none;
  }
  .gnav.open{display:flex}
  .gnav a{padding:17px var(--pad);border-top:1px solid var(--line);font-size:12px}
  .gnav .btn{margin:18px var(--pad) 24px;justify-content:center}
  .menu-btn{
    display:flex;flex-direction:column;justify-content:center;gap:5px;
    width:44px;height:44px;padding:10px;
  }
  .menu-btn span{display:block;height:1px;background:var(--ink);transition:transform .3s var(--ease),opacity .3s var(--ease)}
  .menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
  .menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

  .sec{padding-block:clamp(72px,18vw,104px)}
  .hero .wrap{grid-template-columns:1fr;gap:44px}
  .hero-img{order:-1}
  .hero-img img{width:min(78%,340px)}
  .lead{font-size:14px}

  .story-steps{grid-template-columns:1fr;gap:34px;margin-top:48px}
  .arrow svg{transform:rotate(90deg)}
  .step-img{height:240px;max-width:260px}

  .product-row{display:grid;grid-template-columns:repeat(2,1fr);gap:40px 16px;justify-items:center}
  .p-item:last-child{grid-column:1 / -1}
  .p-unit{--cell:clamp(24px,7.5vw,34px)}

  .use-grid{margin-inline:calc(var(--pad) * -1);padding-inline:var(--pad)}
  .use-item{min-width:72vw;border-left:none!important}
  .use-item + .use-item{margin-left:1px}

  .plan-row{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:28px;margin-inline:calc(var(--pad) * -1);padding:0 var(--pad) 10px}
  .plan-item{scroll-snap-align:center;min-width:60vw}
  .plan-item img{max-width:230px}
  .plan-arrow{display:none}

  .sp-only{display:inline}
  h1{font-size:24px}
  .last h2{font-size:22px}
  .use-img{height:220px;max-width:260px}
  .footer-in{flex-direction:column;align-items:flex-start}
}
/* 関連サイトへのリンク（iebee LAB / イエビータウン）
   別ドメイン同士をつなぐことで、双方の発見性を高める */
.fnav-ext{
  display:flex; gap:20px; flex-wrap:wrap; justify-content:center;
  margin-top:14px; font-size:13px;
}
.fnav-ext a{ color:var(--ink); opacity:.7; text-decoration:underline; text-underline-offset:3px; }
.fnav-ext a:hover{ opacity:1; }
@media (max-width:600px){ .fnav-ext{ gap:12px; font-size:12px; } }