:root{
  --bg:#ffffff;
  --surface:#f4f8fb;
  --surface-2:#eef3f8;
  --ink:#0d1f30;
  --ink-soft:#33485b;
  --muted:#6b7e8f;
  --accent:#0ea5b7;
  --accent-deep:#0b7e94;
  --accent-2:#1f6feb;
  --line:#e2eaf1;
  --white:#fff;
  --radius:16px;
  --radius-sm:11px;
  --shadow:0 10px 30px -12px rgba(13,31,48,.18);
  --shadow-lg:0 24px 60px -20px rgba(13,31,48,.28);
  --container:1180px;
  --jp:"Noto Sans JP";
  --disp:"Outfit";
}
html[lang="zh"]{ --jp:"Noto Sans SC"; }

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--disp),var(--jp),system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,box-shadow .3s;
}
.site-header.scrolled{background:rgba(255,255,255,.92);border-color:var(--line);box-shadow:0 6px 24px -16px rgba(13,31,48,.4)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;flex-direction:column;line-height:1.1}
.brand-mark{font-family:var(--disp);font-weight:800;font-size:23px;letter-spacing:.06em;color:var(--ink)}
.brand-mark span{color:var(--accent)}
.brand-sub{font-size:11px;letter-spacing:.18em;color:var(--muted);margin-top:3px;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:30px}
.nav>a{font-size:14.5px;font-weight:500;color:var(--ink-soft);position:relative;padding:6px 0;transition:color .2s}
.nav>a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent);transition:width .25s}
.nav>a:hover{color:var(--ink)}
.nav>a:hover::after{width:100%}

.lang-switch{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:var(--white)}
.lang-switch button{
  font-family:var(--jp),var(--disp),sans-serif;
  border:0;background:transparent;cursor:pointer;
  padding:7px 13px;font-size:12.5px;font-weight:600;color:var(--muted);transition:.2s;line-height:1
}
.lang-switch button:hover{color:var(--ink)}
.lang-switch button.active{background:var(--accent);color:#fff}

.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;color:#fff}
.hero-bg{position:absolute;inset:0;background:url("../img/hero.jpg") center/cover no-repeat;transform:scale(1.05);animation:heroZoom 18s ease-out forwards}
@keyframes heroZoom{to{transform:scale(1)}}
.hero-overlay{position:absolute;inset:0;background:
  linear-gradient(105deg,rgba(8,24,38,.86) 0%,rgba(8,24,38,.55) 45%,rgba(8,24,38,.2) 100%),
  linear-gradient(0deg,rgba(8,24,38,.55),rgba(8,24,38,0) 40%)}
.hero-content{position:relative;padding-top:120px;padding-bottom:80px;max-width:880px}
.eyebrow{font-family:var(--disp);text-transform:uppercase;letter-spacing:.22em;font-size:12.5px;font-weight:600;color:var(--accent)}
.eyebrow.light{color:#7fe3ef}
.hero-title{font-size:clamp(2.1rem,5.2vw,3.9rem);line-height:1.22;font-weight:800;margin:18px 0 22px;letter-spacing:.01em}
.hero-sub{font-size:clamp(1rem,1.7vw,1.22rem);max-width:660px;color:#dbe7ef;font-weight:400}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--jp),var(--disp),sans-serif;font-weight:600;font-size:15px;padding:14px 30px;border-radius:999px;cursor:pointer;transition:.25s;border:1.5px solid transparent}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 12px 26px -10px rgba(14,165,183,.7)}
.btn-primary:hover{background:var(--accent-deep);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.55);color:#fff;backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.hero-stats{display:flex;gap:38px;margin-top:54px;flex-wrap:wrap}
.hero-stats .stat{min-width:90px}
.hero-stats .stat .num{font-family:var(--disp);font-size:2.1rem;font-weight:800;color:#fff;line-height:1}
.hero-stats .stat .lbl{font-size:12.5px;color:#bcd0dd;margin-top:7px;letter-spacing:.02em}

/* ---------- sections ---------- */
.section{padding:104px 0}
.section-alt{background:var(--surface)}
.section-head{max-width:720px;margin-bottom:54px}
.section-title{font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:800;line-height:1.3;margin-top:12px;color:var(--ink)}
.section-sub{margin-top:16px;color:var(--muted);font-size:1.05rem}

/* about */
.about-grid{display:grid;grid-template-columns:1.25fr .9fr;gap:54px;align-items:start}
.about-text p{color:var(--ink-soft);margin-bottom:20px;font-size:1.03rem}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.info-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow)}
.info-card .ic-label{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:700;font-family:var(--disp)}
.info-card .ic-value{font-size:1.12rem;font-weight:700;color:var(--ink);margin-top:8px;line-height:1.45}

/* products */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.product-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.product-card .pc-img{aspect-ratio:4/3;overflow:hidden;background:var(--surface-2)}
.product-card .pc-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-card:hover .pc-img img{transform:scale(1.07)}
.product-card .pc-body{padding:24px;display:flex;flex-direction:column;flex:1}
.product-card .pc-title{font-size:1.22rem;font-weight:700;color:var(--ink)}
.product-card .pc-en{font-family:var(--disp);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-top:3px}
.product-card .pc-desc{color:var(--muted);font-size:.95rem;margin:12px 0 16px}
.product-card .pc-list{list-style:none;margin-top:auto;display:flex;flex-direction:column;gap:8px}
.product-card .pc-list li{position:relative;padding-left:20px;font-size:.92rem;color:var(--ink-soft)}
.product-card .pc-list li::before{content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:2px;background:var(--accent);transform:rotate(45deg)}

.apps-block{margin-top:46px;display:flex;align-items:center;gap:20px;flex-wrap:wrap;justify-content:center;padding:26px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius)}
.apps-label{font-weight:700;color:var(--ink);font-size:.98rem}
.apps-chips{display:flex;gap:10px;flex-wrap:wrap}
.apps-chips span{background:var(--surface-2);color:var(--ink-soft);font-size:.85rem;font-weight:500;padding:7px 15px;border-radius:999px;border:1px solid var(--line)}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:26px}
.gallery img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .3s}
.gallery img:hover{transform:scale(1.04)}

/* strengths */
.strength-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.strength-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.strength-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.strength-card .sc-num{font-family:var(--disp);font-size:1.05rem;font-weight:700;color:#fff;width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2))}
.strength-card .sc-title{font-size:1.18rem;font-weight:700;margin:20px 0 10px;color:var(--ink)}
.strength-card .sc-desc{color:var(--muted);font-size:.96rem}

/* timeline */
.timeline{position:relative;max-width:780px;margin:0 auto;padding-left:8px}
.timeline::before{content:"";position:absolute;left:13px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--accent),var(--accent-2))}
.tl-item{position:relative;padding:0 0 42px 56px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:6px;top:4px;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--accent);box-shadow:0 0 0 5px rgba(14,165,183,.13)}
.tl-year{font-family:var(--disp);font-size:1.5rem;font-weight:800;color:var(--accent-deep);line-height:1}
.tl-title{font-size:1.16rem;font-weight:700;margin:8px 0 8px;color:var(--ink)}
.tl-desc{color:var(--ink-soft);font-size:.98rem}

/* vision */
.vision{padding:110px 0;background:linear-gradient(120deg,#0c2233,#0e3a44 55%,#0b6173);color:#fff;text-align:center;position:relative;overflow:hidden}
.vision::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(14,165,183,.35),transparent 55%);pointer-events:none}
.vision-inner{position:relative;max-width:840px}
.vision-quote{font-size:clamp(1.5rem,3.6vw,2.5rem);font-weight:800;line-height:1.45;margin:20px 0 24px;border:0}
.vision-body{color:#cfe6ed;font-size:1.05rem;max-width:680px;margin:0 auto}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.2fr .9fr;gap:46px;align-items:start}
.contact-form{display:flex;flex-direction:column;gap:18px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.contact-form label{display:flex;flex-direction:column;gap:8px;font-size:.9rem;font-weight:600;color:var(--ink-soft)}
.contact-form input,.contact-form textarea{
  font-family:inherit;font-size:1rem;padding:13px 15px;border:1.5px solid var(--line);border-radius:11px;background:var(--surface);color:var(--ink);transition:.2s;resize:vertical
}
.contact-form input:focus,.contact-form textarea:focus{outline:0;border-color:var(--accent);background:#fff;box-shadow:0 0 0 4px rgba(14,165,183,.12)}
.contact-form .btn{align-self:flex-start;margin-top:4px}
.form-note{font-size:.95rem;color:var(--accent-deep);font-weight:600;background:rgba(14,165,183,.1);padding:12px 16px;border-radius:11px}
.contact-cards{display:flex;flex-direction:column;gap:16px}
.contact-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.contact-card .cc-role{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:700;font-family:var(--disp)}
.contact-card .cc-name{font-size:1.18rem;font-weight:700;color:var(--ink);margin:8px 0 14px}
.contact-card .cc-row{display:flex;gap:10px;font-size:.95rem;color:var(--ink-soft);margin-top:7px}
.contact-card .cc-row b{color:var(--muted);font-weight:600;min-width:74px;flex-shrink:0}

/* footer */
.site-footer{background:#0b1a28;color:#cddbe6}
.footer-inner{display:flex;justify-content:space-between;gap:40px;padding:56px 24px;flex-wrap:wrap}
.footer-brand .brand-mark{color:#fff;font-size:25px}
.footer-tagline{margin-top:14px;color:#8ba6b8;font-size:.92rem;max-width:320px;font-family:var(--disp)}
.footer-nav{display:flex;gap:26px;flex-wrap:wrap;align-items:center}
.footer-nav a{color:#bcd0dd;font-size:14px;transition:color .2s}
.footer-nav a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;font-size:13px;color:#7d97a8}

/* reveal */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
[data-reveal].in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:920px){
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:32px}
  .product-grid,.strength-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  .hamburger{display:flex}
  .nav{
    position:fixed;top:74px;right:0;left:0;flex-direction:column;align-items:flex-start;gap:4px;
    background:#fff;border-bottom:1px solid var(--line);padding:18px 24px 26px;
    transform:translateY(-130%);transition:transform .35s;box-shadow:var(--shadow-lg);height:auto
  }
  .nav.open{transform:translateY(0)}
  .nav>a{width:100%;padding:12px 0;border-bottom:1px solid var(--surface-2);font-size:1rem}
  .lang-switch{margin-top:14px}
  .section{padding:72px 0}
  .product-grid,.strength-grid,.gallery,.about-cards{grid-template-columns:1fr 1fr}
  .hero-stats{gap:26px}
  .hero-content{padding-top:104px}
}
@media (max-width:480px){
  .product-grid,.strength-grid,.about-cards{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr 1fr}
  .hero-stats .stat .num{font-size:1.7rem}
}