/* ============================================================
   ミズタニ住設 | エコキュート交換 広告LP + 見積りシミュレーター
   palette: off-white #f5f6f2 / ink #111 / orange #ff5f1f / blue #2979ff
   ============================================================ */
:root{
  --bg:#f5f6f2;
  --card:#ffffff;
  --ink:#111;
  --muted:#6d6d66;
  --orange:#ff5f1f;
  --cta:#cc3d05;
  --cta-hover:#ff5f1f;
  --blue:#2979ff;
  --blue-deep:#1a56c4;
  --line:rgba(17,17,17,.14);
  --font-d:"Zen Kaku Gothic New","Noto Sans JP",sans-serif;
  --font-n:"Roboto Condensed","Zen Kaku Gothic New",sans-serif;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--font-d);font-size:16px;line-height:1.8;
  font-feature-settings:"palt";-webkit-font-smoothing:antialiased;
}
::selection{background:var(--orange);color:#fff}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}

.wrap{width:min(100% - 40px,1120px);margin-inline:auto}
.num{font-family:var(--font-n);letter-spacing:.04em}

/* ---------- top bar ---------- */
.topbar{background:var(--ink);color:#fff;font-size:12px;letter-spacing:.06em}
.topbar .wrap{display:flex;justify-content:space-between;gap:16px;padding:8px 0;flex-wrap:wrap}
.topbar b{color:var(--orange)}

/* ---------- header ---------- */
.header{position:sticky;top:0;z-index:60;background:var(--bg);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.logo{display:flex;flex-direction:column;line-height:1.35}
.logo strong{font-weight:900;font-size:20px;letter-spacing:.04em}
.logo small{font-size:10px;letter-spacing:.14em;color:var(--muted)}
.header-right{display:flex;align-items:center;gap:12px}
.header-tel{display:flex;flex-direction:column;align-items:flex-end;line-height:1.3}
.header-tel a{font-family:var(--font-n);font-size:22px;font-weight:700;color:var(--ink);letter-spacing:.04em}
.header-tel a:hover{color:var(--cta)}
.header-tel small{font-size:10px;color:var(--muted);letter-spacing:.08em}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 28px;font-size:14px;font-weight:700;letter-spacing:.08em;min-height:50px;transition:background .3s ease,transform .2s ease,color .3s ease;border:2px solid transparent}
.btn-cta{background:var(--cta);color:#fff}
.btn-cta:hover{background:var(--cta-hover)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:var(--cta)}
.btn-line{border-color:var(--ink);color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}

/* ---------- hero ---------- */
.hero{padding:72px 0 80px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;font-size:12px;font-weight:700;letter-spacing:.1em;padding:8px 16px;margin-bottom:24px}
.hero-title{font-weight:900;font-size:clamp(30px,3.8vw,50px);line-height:1.5;letter-spacing:.02em}
.hero-title .hl{background:linear-gradient(transparent 62%,var(--orange) 62%,var(--orange) 92%,transparent 92%)}
.hero-price{margin:28px 0 8px;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.hero-price .from{font-size:14px;font-weight:700;color:var(--muted)}
.hero-price b{font-family:var(--font-n);font-weight:700;font-size:clamp(48px,6vw,76px);line-height:1;color:var(--cta);letter-spacing:.01em}
.hero-price .tax{font-size:13px;color:var(--muted)}
.hero-points{margin:24px 0 34px;display:flex;flex-direction:column;gap:10px}
.hero-points li{list-style:none;display:flex;gap:12px;align-items:baseline;font-size:14.5px;font-weight:700}
.hero-points li::before{content:"";flex-shrink:0;width:10px;height:10px;background:var(--orange);transform:translateY(1px)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-img{position:relative}
.hero-img img{width:100%;aspect-ratio:4/3;object-fit:cover;transform:scale(1.06);transition:transform 1.4s var(--ease)}
.hero-img.is-in img{transform:scale(1)}
.hero-img::before{content:"";position:absolute;top:-16px;right:-16px;width:96px;height:96px;background:var(--orange);z-index:-1}
.hero-cap{margin-top:14px;font-size:11px;color:var(--muted);letter-spacing:.1em;text-align:right}

/* ---------- stats band ---------- */
.band{background:var(--ink);color:#fff;padding:56px 0}
.band-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.band-grid b{font-family:var(--font-n);font-weight:700;font-size:clamp(34px,4vw,50px);display:block;line-height:1.1}
.band-grid b small{font-size:.42em;margin-left:.1em}
.band-grid span{font-size:12px;color:#9a9a93;letter-spacing:.1em}
.band-grid .ob{color:var(--orange)}

/* ---------- sections ---------- */
.sec{padding:96px 0}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head .en{font-size:11px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--blue);display:block;margin-bottom:14px}
.sec-head h2{font-weight:900;font-size:clamp(26px,3.4vw,42px);line-height:1.5;letter-spacing:.02em}
.sec-head p{margin-top:14px;color:var(--muted);font-size:14px;max-width:56ch;margin-inline:auto}

/* reasons */
.reason-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.reason{background:var(--card);border:1px solid var(--line);padding:32px 26px;transition:transform .3s var(--ease),box-shadow .3s ease}
.reason:hover{transform:translateY(-6px);box-shadow:0 14px 30px rgba(17,17,17,.08)}
.reason .num{font-size:13px;font-weight:700;color:var(--orange);letter-spacing:.14em;display:block;margin-bottom:16px}
.reason h3{font-size:16.5px;font-weight:900;margin-bottom:10px;line-height:1.6}
.reason p{font-size:13px;color:var(--muted)}

/* products */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.prod{background:var(--card);border:2px solid var(--line);padding:0 0 32px;position:relative;transition:border-color .3s ease,transform .3s var(--ease)}
.prod:hover{border-color:var(--ink);transform:translateY(-4px)}
.prod.is-hot{border-color:var(--orange)}
.prod-img{aspect-ratio:4/3;overflow:hidden;background:#eee}
.prod-img img{width:100%;height:100%;object-fit:cover}
.prod-body{padding:24px 26px 0}
.prod-badge{position:absolute;top:0;left:0;background:var(--orange);color:#fff;font-size:12px;font-weight:700;letter-spacing:.1em;padding:8px 16px;z-index:1}
.prod h3{font-size:18px;font-weight:900}
.prod .cap{font-size:12px;color:var(--muted);margin:6px 0 18px}
.prod-price{display:flex;align-items:baseline;gap:8px;border-top:1px dashed var(--line);padding-top:18px}
.prod-price .from{font-size:12px;font-weight:700;color:var(--muted)}
.prod-price b{font-family:var(--font-n);font-weight:700;font-size:38px;color:var(--cta);line-height:1}
.prod-price .tax{font-size:11px;color:var(--muted)}
.prod-inc{margin-top:12px;font-size:11.5px;color:var(--blue-deep);font-weight:700;letter-spacing:.04em}

/* ---------- before/after ---------- */
.ba-sec{background:var(--ink);color:#fff}
.ba-sec .sec-head h2{color:#fff}
.ba-sec .sec-head .en{color:var(--orange)}
.ba-sec .sec-head p{color:#9a9a93}
.ba{position:relative;max-width:900px;margin:0 auto;user-select:none;touch-action:pan-y}
.ba-viewport{position:relative;aspect-ratio:16/10;overflow:hidden;border:4px solid #fff}
.ba-viewport img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;pointer-events:none}
.ba-after{clip-path:inset(0 0 0 var(--ba,50%))}
.ba-word{position:absolute;top:18px;font-weight:900;font-size:clamp(28px,5vw,56px);letter-spacing:.06em;z-index:2;pointer-events:none;opacity:.95}
.ba-word.l{left:22px;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.5)}
.ba-word.r{right:22px;color:var(--orange);text-shadow:0 2px 12px rgba(0,0,0,.5)}
.ba-handle{position:absolute;top:0;bottom:0;left:var(--ba,50%);width:4px;background:#fff;z-index:3;transform:translateX(-50%);cursor:ew-resize}
.ba-handle::after{content:"◂ ▸";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--orange);color:#fff;font-size:13px;padding:12px 14px;border-radius:50px;white-space:nowrap;letter-spacing:2px}
.ba-note{max-width:900px;margin:20px auto 0;font-size:12.5px;color:#9a9a93;text-align:center}

/* ---------- flow ---------- */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.flow-item{background:var(--card);padding:32px 24px}
.flow-item .num{font-size:34px;font-weight:700;color:var(--orange);display:block;line-height:1;margin-bottom:16px}
.flow-item h3{font-size:15.5px;font-weight:900;margin-bottom:8px}
.flow-item p{font-size:12.5px;color:var(--muted)}

/* ---------- voice ---------- */
.voice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.voice-card{background:var(--card);border:1px solid var(--line);padding:30px 26px}
.voice-card .stars{color:var(--orange);letter-spacing:4px;font-size:14px;margin-bottom:14px}
.voice-card p{font-size:13.5px}
.voice-card figcaption{margin-top:16px;font-size:12px;color:var(--muted)}
.voice-img{margin-top:32px;overflow:hidden}
.voice-img img{width:100%;height:clamp(240px,32vw,380px);object-fit:cover;transform:scale(1.06);transition:transform 1.2s var(--ease)}
.voice-img.is-in img{transform:scale(1)}

/* ---------- estimate wizard (dark) ---------- */
.wiz-sec{background:var(--ink);color:#fff;padding:96px 0}
.wiz{max-width:760px;margin:0 auto;background:#1b1b1b;border:1px solid rgba(255,255,255,.14);padding:48px}
.wiz-head{display:flex;justify-content:space-between;align-items:flex-end;border-bottom:1px solid rgba(255,255,255,.14);padding-bottom:24px;margin-bottom:32px}
.wiz-head .en{font-size:10.5px;letter-spacing:.22em;color:var(--orange);display:block;margin-bottom:10px}
.wiz-head h2{font-weight:900;font-size:clamp(22px,2.6vw,30px)}
.wiz-step-num{font-family:var(--font-n);font-weight:700;font-size:56px;line-height:1;color:var(--orange);overflow:hidden;height:56px}
.wiz-step-num span{display:block;transition:transform .45s var(--ease)}
.wiz-step-num span i{display:block;font-style:normal;height:56px}
.wiz-progress{display:flex;gap:6px;margin-bottom:36px}
.wiz-progress i{flex:1;height:4px;background:rgba(255,255,255,.15);transition:background .4s ease}
.wiz-progress i.is-done{background:var(--orange)}
.step{display:none}
.step.is-on{display:block;animation:stepIn .45s var(--ease)}
@keyframes stepIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.step-q{font-weight:900;font-size:19px;margin-bottom:22px}
.opt-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.opt{position:relative}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt label{display:block;background:transparent;border:2px solid rgba(255,255,255,.25);padding:18px 20px;font-size:14.5px;font-weight:700;cursor:pointer;transition:border-color .25s ease,background .25s ease;min-height:56px}
.opt label small{display:block;font-weight:400;font-size:11.5px;color:#9a9a93;margin-top:4px}
.opt label:hover{border-color:rgba(255,255,255,.6)}
.opt input:checked+label{border-color:var(--orange);background:rgba(255,95,31,.14)}
.opt input:focus-visible+label{outline:3px solid var(--blue);outline-offset:2px}
.wiz-err{color:#ff9d7a;font-size:13px;margin-top:14px;min-height:1.5em;display:block}
.wiz-nav{display:flex;justify-content:space-between;gap:16px;margin-top:28px}
.wiz-nav .btn{min-width:160px}
.f-field{display:flex;flex-direction:column;gap:8px;margin-bottom:22px}
.f-label{font-size:13px;font-weight:700;letter-spacing:.06em}
.f-label .req{color:var(--orange);font-size:11px;margin-left:8px}
.f-input{background:transparent;border:1px solid rgba(255,255,255,.35);color:#fff;padding:14px 16px;font:inherit;font-size:15px;border-radius:0;transition:border-color .3s ease}
.f-input::placeholder{color:#7d7d75}
.f-input:focus{outline:none;border-color:var(--orange)}
.f-field.is-error .f-input{border-color:#ff9d7a}
.f-err{font-size:12px;color:#ff9d7a;display:none}
.f-field.is-error .f-err{display:block}
.result{display:none}
.result.is-on{display:block;animation:stepIn .45s var(--ease)}
.result-box{border:2px solid var(--orange);padding:32px;text-align:center;margin-bottom:28px}
.result-box .en{font-size:10.5px;letter-spacing:.22em;color:var(--orange);display:block;margin-bottom:12px}
.result-box h3{font-size:20px;font-weight:900;margin-bottom:10px}
.result-box .est{font-family:var(--font-n);font-weight:700;font-size:clamp(44px,6vw,64px);color:var(--orange);line-height:1.1}
.result-box .est small{font-size:.32em;color:#fff;font-weight:400}
.result-box p{font-size:12.5px;color:#c9c9c1;margin-top:12px}
.f-success{text-align:center;padding:40px 8px;display:none}
.f-success.is-show{display:block}
.f-success h3{font-size:22px;font-weight:900;margin-bottom:14px;color:var(--orange)}
.f-success p{font-size:14px;color:#c9c9c1}

/* ---------- faq ---------- */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--line);margin-bottom:12px}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 24px;text-align:left;font-weight:900;font-size:15.5px;min-height:56px}
.faq-q .ic{color:var(--orange);font-size:22px;flex-shrink:0;transition:transform .3s var(--ease)}
.faq-item.is-open .faq-q .ic{transform:rotate(45deg)}
.faq-a{height:0;overflow:hidden;transition:height .45s cubic-bezier(.22,1,.36,1)}
.faq-a p{padding:0 24px 22px;font-size:14px;color:var(--muted)}

/* ---------- final cta ---------- */
.final{background:var(--cta);color:#fff;padding:80px 0;text-align:center}
.final h2{font-weight:900;font-size:clamp(26px,3.4vw,40px);margin-bottom:14px}
.final p{opacity:.92;font-size:14.5px;margin-bottom:32px}
.final .tel{font-family:var(--font-n);font-weight:700;font-size:clamp(36px,5vw,56px);letter-spacing:.03em;display:inline-block}
.final .tel:hover{color:var(--ink)}
.final .btns{margin-top:28px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.final .btn-ink:hover{background:#fff;color:var(--ink)}

/* ---------- footer ---------- */
.footer{background:var(--ink);color:#9a9a93;padding:48px 0 32px;font-size:12px;letter-spacing:.06em}
.footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer b{color:#fff}

/* ---------- fixed cta (mobile) ---------- */
.fixed-cta{display:none;position:fixed;left:0;right:0;bottom:0;z-index:80;box-shadow:0 -4px 20px rgba(0,0,0,.18)}
.fixed-cta a{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:16px;font-weight:900;font-size:14px;letter-spacing:.06em;min-height:56px}
.fixed-cta .fc-tel{background:#fff;color:var(--ink)}
.fixed-cta .fc-est{background:var(--cta);color:#fff}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s var(--ease)}
.rv.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .reason-grid{grid-template-columns:1fr 1fr}
  .prod-grid{grid-template-columns:1fr;max-width:520px;margin-inline:auto}
  .flow-grid{grid-template-columns:1fr 1fr}
  .voice-grid{grid-template-columns:1fr}
  .band-grid{grid-template-columns:repeat(2,1fr);gap:36px}
}
@media(max-width:640px){
  .sec{padding:64px 0}
  .hero{padding:48px 0 56px}
  .header-tel{display:none}
  .opt-grid{grid-template-columns:1fr}
  .flow-grid{grid-template-columns:1fr}
  .wiz{padding:32px 22px}
  .fixed-cta{display:flex}
  body{padding-bottom:56px}
  .reason-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none}
}

/* mobile: 価格と税込表記を同一行に */
@media (max-width: 640px) {
  .hero-price .from { flex-basis: 100%; }
  .hero-price b { font-size: 46px; }
  .hero-price .tax { white-space: nowrap; }
}