/* ===== 津野水道株式会社 ===== */
:root{
  --ink: #ece8db;
  --ink-mute: #989590;
  --bg-dark: #071426;
  --bg-dark-2: #0c1c30;
  --bg-black: #0a0a0a;
  --gold: #b79a5b;
  --gold-hover: #d4b87a;
  --line: #2a2f3a;
  --line-2: #1a1f2a;
  --maxw: 1200px;
  --maxw-narrow: 820px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:#000}
body{
  font-family:'Noto Sans JP',sans-serif;
  color:var(--ink);background:var(--bg-black);
  font-weight:400;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:'Noto Serif JP',serif;font-weight:500;line-height:1.4;letter-spacing:.04em}
ul{list-style:none}

.container{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.container--narrow{max-width:var(--maxw-narrow)}

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;width:100%;z-index:100;
  transition:background .35s,border-color .35s,backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.site-header__inner{
  max-width:var(--maxw);margin:0 auto;padding:18px 32px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;flex-direction:column;line-height:1.25}
.brand__en{
  font-family:'Oswald',sans-serif;font-weight:500;
  font-size:1.15rem;letter-spacing:.22em;color:#fff;
}
.brand__jp{font-size:.62rem;letter-spacing:.3em;color:rgba(255,255,255,.7);margin-top:2px}

.nav{display:flex;align-items:center;gap:34px}
.nav a{
  font-family:'Oswald',sans-serif;font-weight:400;font-size:.85rem;
  letter-spacing:.22em;color:rgba(255,255,255,.85);
  transition:color .2s;position:relative;padding:6px 0;
}
.nav a:hover{color:var(--gold)}
.nav__cta{
  color:#fff !important;border:1px solid var(--gold);
  padding:10px 22px !important;
}
.nav__cta:hover{background:var(--gold);color:var(--bg-dark) !important}

.site-header.scrolled{
  background:rgba(7,10,12,.92);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
}

.nav-toggle{
  display:none;background:none;border:0;cursor:pointer;
  width:34px;height:28px;position:relative;z-index:101;
}
.nav-toggle span{
  display:block;height:1.5px;width:100%;background:#fff;
  position:absolute;left:0;transition:.3s;
}
.nav-toggle span:nth-child(1){top:3px}
.nav-toggle span:nth-child(2){top:13px}
.nav-toggle span:nth-child(3){top:23px}
.nav-toggle.open span:nth-child(1){top:13px;transform:rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){top:13px;transform:rotate(-45deg)}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:100vh;min-height:100svh;
  display:flex;align-items:center;color:var(--ink);
  overflow:hidden;
}
.hero__bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  filter:brightness(.62) saturate(1.15);
  animation:heroZoom 18s ease-out forwards;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(115deg,rgba(7,20,38,.85) 0%,rgba(10,10,10,.4) 55%,rgba(7,20,38,.55) 100%),
    radial-gradient(ellipse at 80% 65%,rgba(183,154,91,.18) 0%,transparent 60%);
}
@keyframes heroZoom{
  0%{transform:scale(1.08)}
  100%{transform:scale(1)}
}
.hero__inner{
  position:relative;z-index:2;
  max-width:var(--maxw);width:100%;margin:0 auto;
  padding:120px 32px 100px;
}
.hero__eyebrow{
  font-family:'Oswald',sans-serif;font-size:.78rem;letter-spacing:.32em;
  color:var(--gold);margin-bottom:38px;
}
.hero__title{display:flex;flex-direction:column;gap:18px}
.hero__title-main{
  font-family:'Noto Serif JP',serif;font-weight:500;
  font-size:clamp(2.2rem,5.5vw,4.4rem);
  letter-spacing:.06em;line-height:1.3;color:#fff;
}
.hero__title-en{
  font-family:'Oswald',sans-serif;font-weight:300;
  font-size:clamp(.7rem,1.4vw,1rem);letter-spacing:.32em;
  color:var(--gold);opacity:.85;
}
.hero__tagline{
  font-family:'Noto Serif JP',serif;font-weight:400;
  font-size:clamp(1rem,1.8vw,1.35rem);
  margin-top:34px;letter-spacing:.18em;color:var(--ink);
}
.hero__lead{
  font-size:.95rem;line-height:2.1;margin-top:22px;
  color:rgba(236,232,219,.85);max-width:520px;
}
.hero__chips{
  display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;list-style:none;
}
.chip{
  display:inline-flex;align-items:center;gap:10px;
  padding:11px 22px;
  border:1px solid rgba(183,154,91,.55);
  color:var(--ink);background:rgba(7,20,38,.5);
  font-size:.86rem;letter-spacing:.12em;
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.chip__icon{font-size:1.1rem;filter:drop-shadow(0 0 6px rgba(183,154,91,.6))}

.hero__actions{display:flex;gap:18px;margin-top:40px;flex-wrap:wrap}
.hero__scroll{
  position:absolute;bottom:32px;left:50%;transform:translateX(-50%);z-index:2;
  font-family:'Oswald',sans-serif;font-size:.7rem;letter-spacing:.32em;
  color:var(--gold);animation:scrollPulse 2.5s infinite;
}
@keyframes scrollPulse{
  0%,100%{opacity:.5;transform:translate(-50%,0)}
  50%{opacity:1;transform:translate(-50%,6px)}
}

/* ===== Photo strip (Hero下) ===== */
.photo-strip{
  display:grid;grid-template-columns:repeat(5,1fr);gap:0;
  background:#000;border-top:1px solid var(--line);
}
.photo-strip figure{
  position:relative;aspect-ratio:1/1;overflow:hidden;margin:0;
  border-right:1px solid var(--line-2);
}
.photo-strip figure:last-child{border-right:0}
.photo-strip img{
  width:100%;height:100%;object-fit:cover;
  filter:brightness(.7) grayscale(.15);
  transition:filter .5s,transform .8s ease;
}
.photo-strip figure:hover img{
  filter:brightness(1) grayscale(0);transform:scale(1.06);
}
.photo-strip figcaption{
  position:absolute;inset:auto 0 0 0;
  padding:18px 16px 14px;
  background:linear-gradient(transparent,rgba(0,0,0,.92));
  color:#fff;font-family:'Oswald',sans-serif;letter-spacing:.15em;
  display:flex;flex-direction:column;gap:2px;
}
.photo-strip__label{
  font-size:.68rem;color:var(--gold);opacity:.85;
}
.photo-strip__name{
  font-family:'Noto Sans JP',sans-serif;font-size:.84rem;
  letter-spacing:.08em;font-weight:500;
}

/* ===== Button ===== */
.btn{
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;
  padding:18px 38px;font-family:inherit;font-weight:500;font-size:.95rem;
  letter-spacing:.08em;cursor:pointer;border:1px solid transparent;
  transition:all .25s ease;text-align:center;line-height:1.3;
}
.btn__sub{
  display:block;font-family:'Oswald',sans-serif;font-weight:300;
  font-size:.65rem;letter-spacing:.3em;opacity:.7;margin-top:6px;
}
.btn--gold{background:var(--gold);color:var(--bg-dark);border-color:var(--gold)}
.btn--gold:hover{background:var(--gold-hover);border-color:var(--gold-hover)}
.btn--outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn--outline:hover{background:rgba(255,255,255,.08);border-color:var(--gold);color:var(--gold)}
.btn--lg{padding:24px 48px;font-size:1.05rem}
.btn--lg .btn__num{font-family:'Oswald',sans-serif;font-size:1.7rem;letter-spacing:.1em;font-weight:500}
.btn--block{width:100%;padding:18px}

/* ===== Sections ===== */
.section{padding:clamp(80px,11vw,140px) 0;position:relative}
.section--dark{background:var(--bg-dark)}
.section--black{background:var(--bg-black)}
.section__eyebrow{
  font-family:'Oswald',sans-serif;font-size:.78rem;letter-spacing:.32em;
  color:var(--gold);text-align:center;
}
.section__title{
  font-family:'Noto Serif JP',serif;font-weight:500;
  font-size:clamp(1.7rem,3.5vw,2.4rem);
  text-align:center;margin-top:22px;letter-spacing:.08em;color:#fff;
  line-height:1.5;
}
.section__title--left{text-align:left}
.section__title::after{
  content:"";display:block;width:38px;height:1px;background:var(--gold);
  margin:32px auto 0;
}
.section__title--left::after{margin-left:0}

/* ===== MISSION ===== */
.mission-body{
  margin-top:60px;text-align:center;font-size:1rem;color:rgba(236,232,219,.92);
}
.mission-body p{margin-bottom:28px;line-height:2.1}
.mission-body__close{
  margin-top:40px;padding-top:40px;border-top:1px solid var(--line);
  font-family:'Noto Serif JP',serif;color:#fff;font-size:1.05rem;
}

/* ===== ABOUT (Split) ===== */
.split-section{padding:0}
.split{
  display:grid;grid-template-columns:1fr 1fr;min-height:560px;
}
.split__media{position:relative;overflow:hidden;background:#000}
.split__media img{width:100%;height:100%;object-fit:cover;object-position:center}
.split__text{
  padding:clamp(50px,7vw,100px);
  display:flex;flex-direction:column;justify-content:center;
}
.split__text .section__eyebrow{text-align:left}
.split__text p{margin-top:20px;color:rgba(236,232,219,.85)}
.split__text .lead-line{
  margin-top:32px;padding-top:32px;border-top:1px solid var(--line);
  font-family:'Noto Serif JP',serif;color:#fff;font-size:1.1rem;
}

/* ===== STRENGTH ===== */
.strength-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:var(--line);margin-top:70px;
}
.strength-card{
  background:var(--bg-dark);padding:50px 40px;
  position:relative;overflow:hidden;min-height:380px;
  display:flex;flex-direction:column;
}
.strength-card--photo{
  background-image:var(--photo);background-size:cover;background-position:center;
  color:#fff;
}
.strength-card--photo::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(7,20,38,.55) 0%,rgba(10,10,10,.92) 100%);
}
.strength-card>*{position:relative;z-index:1}
.strength-card__num{
  font-family:'Oswald',sans-serif;font-size:2.5rem;font-weight:300;
  color:var(--gold);letter-spacing:.1em;
}
.strength-card__title{
  font-size:1.2rem;margin-top:18px;color:#fff;font-weight:500;
}
.strength-card__list{
  list-style:none;margin-top:24px;padding-top:24px;
  border-top:1px solid var(--line);
  display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;
}
.strength-card__list li{
  font-size:.86rem;color:rgba(236,232,219,.85);
  padding-left:18px;position:relative;
}
.strength-card__list li::before{
  content:"";position:absolute;left:0;top:.7em;
  width:8px;height:1px;background:var(--gold);
}
.strength-card__note,
.strength-card p{
  font-size:.92rem;line-height:1.95;margin-top:18px;
  color:rgba(236,232,219,.82);
}

/* ===== SERVICE ===== */
.service-row{
  display:grid;grid-template-columns:1fr 1fr;
  max-width:var(--maxw);margin:60px auto 0;align-items:stretch;
}
.service-row--reverse{direction:rtl}
.service-row--reverse > *{direction:ltr}
.service-row__media{aspect-ratio:16/10;overflow:hidden;background:#000}
.service-row__media img{width:100%;height:100%;object-fit:cover}
.service-row__text{
  padding:clamp(40px,5vw,72px);display:flex;flex-direction:column;justify-content:center;
}
.service-row__num{
  font-family:'Oswald',sans-serif;font-weight:300;font-size:.8rem;
  letter-spacing:.32em;color:var(--gold);
}
.service-row__text h3{
  font-size:clamp(1.2rem,2.2vw,1.6rem);margin-top:14px;color:#fff;
}
.service-row__text p{margin-top:18px;color:rgba(236,232,219,.85)}

/* ===== WORKS ===== */
.works-list{
  list-style:none;display:flex;flex-wrap:wrap;justify-content:center;
  gap:12px 22px;margin-top:48px;
}
.works-list li{
  font-size:.92rem;color:rgba(236,232,219,.92);
  padding:10px 22px;border:1px solid var(--line);
  font-family:'Noto Sans JP',sans-serif;letter-spacing:.06em;
}
.works-gallery{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:60px;
}
.works-gallery figure{aspect-ratio:1/1;overflow:hidden}
.works-gallery img{
  width:100%;height:100%;object-fit:cover;
  filter:grayscale(.2);transition:filter .4s,transform .6s;
}
.works-gallery figure:hover img{filter:none;transform:scale(1.05)}

/* ===== AREA ===== */
.area-intro{text-align:center;margin-top:30px;color:rgba(236,232,219,.85)}
.area-list{
  list-style:none;display:flex;flex-wrap:wrap;justify-content:center;
  gap:0;margin-top:40px;
}
.area-list li{
  font-family:'Noto Serif JP',serif;font-size:1.15rem;color:#fff;
  padding:14px 28px;border-right:1px solid var(--line);
}
.area-list li:last-child{border-right:0}
.area-note{text-align:center;margin-top:30px;color:var(--ink-mute);font-size:.88rem}

/* ===== COMPANY ===== */
.company-grid{
  display:grid;grid-template-columns:300px 1fr;gap:60px;margin-top:60px;
  align-items:start;
}
.company-photo img{width:100%;aspect-ratio:1/1;object-fit:cover}
.company-photo__caption{
  margin-top:18px;font-family:'Noto Serif JP',serif;color:#fff;
  text-align:center;letter-spacing:.1em;
}
.company-photo__caption span{
  display:block;font-size:.75rem;letter-spacing:.2em;
  color:var(--ink-mute);margin-top:4px;
}
.company-info{display:flex;flex-direction:column}
.company-info > div{
  display:grid;grid-template-columns:140px 1fr;gap:24px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.company-info > div:first-child{padding-top:0}
.company-info dt{
  font-family:'Oswald',sans-serif;font-size:.78rem;
  letter-spacing:.22em;color:var(--gold);text-transform:uppercase;
}
.company-info dd{color:#fff;line-height:1.8}
.company-info dd a{color:#fff;border-bottom:1px solid var(--gold)}

/* ===== CONTACT ===== */
.contact-intro{text-align:center;margin-top:30px;color:rgba(236,232,219,.85);line-height:2.1}
.contact-direct{text-align:center;margin:48px 0 60px}
.contact-form{
  background:var(--bg-dark);padding:clamp(36px,5vw,56px);
  display:flex;flex-direction:column;gap:22px;
  border:1px solid var(--line);position:relative;
}
.contact-form__title{
  font-family:'Oswald',sans-serif;letter-spacing:.22em;
  font-size:.85rem;color:var(--gold);text-align:center;margin-bottom:8px;
}
.contact-form label{display:flex;flex-direction:column;gap:8px}
.contact-form label span{
  font-size:.82rem;color:rgba(236,232,219,.78);letter-spacing:.08em;
}
.contact-form label em{color:var(--gold);font-style:normal;margin-left:4px}
.contact-form input,
.contact-form textarea{
  background:transparent;border:0;border-bottom:1px solid var(--line);
  padding:12px 4px;color:#fff;font-family:inherit;font-size:1rem;
  outline:none;transition:border-color .2s;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder{color:var(--ink-mute);font-size:.92rem}
.contact-form input:focus,
.contact-form textarea:focus{border-bottom-color:var(--gold)}
.contact-form textarea{resize:vertical;min-height:120px;line-height:1.85}
.contact-form .btn--block{margin-top:14px}
.contact-form .btn--block:disabled{background:#5a5142;cursor:wait}
.contact-form__result{font-size:.9rem;text-align:center;min-height:1.2em;margin:0}
.contact-form__result.success{color:#7bbd91}
.contact-form__result.error{color:#d97078}
.contact-form__note{font-size:.74rem;text-align:center;color:var(--ink-mute);margin:0}
.contact-form__honeypot{position:absolute;left:-9999px;opacity:0;pointer-events:none}

/* ===== Footer ===== */
.site-footer{
  background:#000;padding:54px 0;text-align:center;
  border-top:1px solid var(--line-2);
}
.site-footer__brand{font-size:1.1rem}
.site-footer__meta{font-size:.78rem;margin-top:14px;color:var(--ink-mute);line-height:1.9}
.site-footer__copy{font-size:.72rem;margin-top:22px;color:var(--ink-mute);opacity:.6}

/* ===== Floating Action Button ===== */
.fab{
  position:fixed;right:22px;bottom:22px;z-index:90;
  display:flex;align-items:center;gap:10px;
  background:var(--gold);color:var(--bg-dark);
  padding:14px 22px;font-weight:500;font-size:.92rem;
  box-shadow:0 8px 24px rgba(0,0,0,.4);
  letter-spacing:.06em;transition:all .25s;
}
.fab:hover{background:var(--gold-hover);transform:translateY(-2px)}
.fab__icon{font-size:1.1rem}

/* ===== Reveal animation ===== */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .9s ease,transform .9s ease}
.reveal.visible{opacity:1;transform:none}

/* ===== Responsive ===== */
@media(max-width:900px){
  .container{padding:0 24px}
  .nav-toggle{display:block}
  .nav{
    position:fixed;inset:0;
    background:rgba(10,10,15,.97);backdrop-filter:blur(12px);
    flex-direction:column;justify-content:center;gap:34px;
    transform:translateX(100%);transition:transform .35s;
  }
  .nav.open{transform:translateX(0)}
  .nav a{font-size:1.05rem}
  .split{grid-template-columns:1fr}
  .split__media{min-height:300px}
  .strength-grid{grid-template-columns:1fr}
  .service-row{grid-template-columns:1fr}
  .service-row--reverse{direction:ltr}
  .works-gallery{grid-template-columns:repeat(2,1fr)}
  .photo-strip{grid-template-columns:repeat(2,1fr);grid-auto-rows:auto}
  .photo-strip figure{aspect-ratio:4/3}
  .photo-strip figure:nth-child(5){grid-column:span 2}
  .company-grid{grid-template-columns:1fr;gap:40px}
  .company-photo{max-width:280px;margin:0 auto}
  .company-info > div{grid-template-columns:110px 1fr;gap:16px}
}
@media(max-width:560px){
  .container{padding:0 20px}
  .site-header__inner{padding:14px 20px}
  .hero__inner{padding:100px 20px 80px}
  .hero__actions{flex-direction:column}
  .hero__actions .btn{width:100%}
  .strength-card{padding:36px 24px}
  .strength-card__list{grid-template-columns:1fr}
  .service-row__text{padding:30px 20px}
  .area-list li{border-right:0;border-bottom:1px solid var(--line);padding:10px 20px}
  .area-list li:last-child{border-bottom:0}
  .fab__text{display:none}
  .fab{padding:14px 16px;border-radius:50%;width:54px;height:54px;justify-content:center}
}