:root{
  --navy:#16324f;
  --navy-deep:#0e2237;
  --sky:#3f8fc4;
  --sky-light:#eaf3f9;
  --ink:#28323c;
  --gray:#6b7681;
  --line:#dbe3ea;
  --bg:#fdfdfc;
  --serif:"Shippori Mincho B1",'Hiragino Mincho ProN',serif;
  --sans:"Noto Sans JP",'Hiragino Kaku Gothic ProN',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.9;font-size:15.5px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--sky);text-decoration:none}
ul{list-style:none}

/* ---------- header ---------- */
.header{position:fixed;inset:0 0 auto 0;z-index:100;background:rgba(253,253,252,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{max-width:1080px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
.brand a{display:block}
.brand svg{height:42px;width:auto;display:block}
.gnav ul{display:flex;gap:28px}
.gnav a{color:var(--ink);font-size:.85rem;font-weight:500;letter-spacing:.06em;position:relative;padding:6px 0}
.gnav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--sky);transition:right .25s}
.gnav a:hover::after{right:0}
.menu-btn{display:none;background:none;border:none;cursor:pointer;width:44px;height:44px;position:relative}
.menu-btn span{position:absolute;left:11px;width:22px;height:2px;background:var(--navy);transition:.3s}
.menu-btn span:nth-child(1){top:15px}
.menu-btn span:nth-child(2){top:22px}
.menu-btn span:nth-child(3){top:29px}
body.nav-open .menu-btn span:nth-child(1){top:22px;transform:rotate(45deg)}
body.nav-open .menu-btn span:nth-child(2){opacity:0}
body.nav-open .menu-btn span:nth-child(3){top:22px;transform:rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:170px 24px 110px;background:
  radial-gradient(1200px 500px at 85% -10%,rgba(63,143,196,.16),transparent 60%),
  radial-gradient(900px 420px at -10% 110%,rgba(22,50,79,.10),transparent 55%),
  linear-gradient(180deg,#f6fafc 0%,#fdfdfc 100%);
  overflow:hidden}
.hero-art{position:absolute;inset:0;pointer-events:none}
.hero-art svg{width:100%;height:100%;display:block}
.hero-art .drift{animation:drift 24s ease-in-out infinite alternate}
@keyframes drift{from{transform:translateY(0)}to{transform:translateY(-10px)}}
@media (prefers-reduced-motion:reduce){.hero-art .drift{animation:none}}
.hero-inner{max-width:1080px;margin:0 auto;position:relative}
.hero .lead-en{font-size:.72rem;letter-spacing:.32em;color:var(--sky);font-weight:700;margin-bottom:18px}
.hero h1{font-family:var(--serif);font-size:clamp(1.9rem,4.6vw,3.1rem);color:var(--navy);line-height:1.55;letter-spacing:.05em;font-weight:700}
.hero .sub{margin-top:26px;color:var(--gray);max-width:34em}
.hero .cta{margin-top:40px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 34px;border-radius:999px;font-size:.88rem;font-weight:600;letter-spacing:.08em;transition:.25s}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--sky)}
.btn-ghost{border:1px solid var(--navy);color:var(--navy);background:#fff}
.btn-ghost:hover{background:var(--navy);color:#fff}

/* ---------- sections ---------- */
.section{padding:96px 24px}
.section.alt{background:var(--sky-light)}
.container{max-width:1080px;margin:0 auto}
.sec-head{margin-bottom:52px}
.sec-head .en{font-size:.7rem;letter-spacing:.3em;color:var(--sky);font-weight:700}
.sec-head h2{font-family:var(--serif);font-size:clamp(1.5rem,3vw,2.1rem);color:var(--navy);letter-spacing:.06em;margin-top:8px}

/* news */
.news-list{border-top:1px solid var(--line)}
.news-list > li > a{display:flex;gap:22px;align-items:baseline;padding:20px 8px;border-bottom:1px solid var(--line);color:var(--ink);transition:background .2s;flex-wrap:wrap}
.news-list > li > a:hover{background:#fff}
.news-list time{font-size:.82rem;color:var(--gray);font-feature-settings:"tnum";white-space:nowrap}
.news-list .label{font-size:.66rem;font-weight:700;letter-spacing:.1em;color:#fff;background:var(--sky);border-radius:3px;padding:2px 9px;white-space:nowrap}
.news-list .label.info{background:var(--navy)}
.news-list .title{flex:1;min-width:14em}

/* philosophy */
.philosophy-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.philosophy .statement{font-family:var(--serif);font-size:clamp(1.25rem,2.4vw,1.7rem);color:var(--navy);line-height:2.1;letter-spacing:.04em}
.philosophy .desc{margin-top:22px;color:var(--gray);font-size:.92rem}
.value-cards{display:grid;gap:16px}
.value-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 26px;display:flex;gap:18px;align-items:flex-start}
.value-card .num{font-family:var(--serif);font-size:1.5rem;color:var(--sky);font-weight:700;line-height:1.4}
.value-card h3{font-size:.98rem;color:var(--navy);margin-bottom:4px}
.value-card p{font-size:.86rem;color:var(--gray)}

/* products */
.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:34px 32px;position:relative;overflow:hidden;transition:box-shadow .25s,transform .25s}
.product-card:hover{box-shadow:0 12px 32px rgba(22,50,79,.10);transform:translateY(-2px)}
.product-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--navy),var(--sky))}
.product-card .cat{font-size:.68rem;letter-spacing:.16em;color:var(--sky);font-weight:700}
.product-card h3{font-family:var(--serif);font-size:1.3rem;color:var(--navy);margin:6px 0 14px;letter-spacing:.05em}
.product-card p{font-size:.88rem;color:var(--gray)}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.chips span{font-size:.74rem;background:var(--sky-light);color:var(--navy);border-radius:999px;padding:3px 12px;letter-spacing:.04em}
.product-note{margin-top:26px;font-size:.78rem;color:var(--gray);background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px 18px}

/* company */
.company-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.company-table th,.company-table td{padding:18px 24px;border-bottom:1px solid var(--line);text-align:left;font-size:.92rem;vertical-align:top}
.company-table tr:last-child th,.company-table tr:last-child td{border-bottom:none}
.company-table th{width:9em;color:var(--navy);font-weight:600;background:#f7fafc;white-space:nowrap}
.company-table a{border-bottom:1px solid currentColor}

/* contact */
.contact{background:var(--navy-deep);color:#fff}
.contact .sec-head h2{color:#fff}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:30px 26px;text-align:center}
.contact-card .kind{font-size:.72rem;letter-spacing:.2em;color:#9ec4de;font-weight:700}
.contact-card .value{font-family:var(--serif);font-size:1.35rem;margin-top:10px;letter-spacing:.04em}
.contact-card .value.mail{font-size:clamp(.85rem,1.35vw,1.08rem);letter-spacing:0;white-space:nowrap}
.contact-card .value a{color:#fff}
.contact-card .note{font-size:.75rem;color:#9db2c2;margin-top:6px}

/* footer */
.footer{background:var(--navy-deep);color:#8fa3b8;color:#8ba3b8;padding:34px 24px;border-top:1px solid rgba(255,255,255,.08)}
.footer-inner{max-width:1080px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer .fbrand{font-family:var(--serif);color:#fff;letter-spacing:.06em}
.footer small{font-size:.72rem}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:840px){
  .menu-btn{display:block}
  .gnav{position:fixed;top:64px;right:0;left:0;background:#fff;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:transform .3s;box-shadow:0 16px 32px rgba(22,50,79,.08)}
  body.nav-open .gnav{transform:none}
  .gnav ul{flex-direction:column;gap:0;padding:12px 24px}
  .gnav a{display:block;padding:14px 4px;border-bottom:1px solid var(--line)}
  .gnav li:last-child a{border-bottom:none}
  .hero{padding:130px 24px 80px}
  .hero-art{opacity:.55}
  .section{padding:72px 24px}
  .philosophy-grid{grid-template-columns:1fr;gap:36px}
  .product-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .company-table th{width:7em;padding:14px 16px}
  .company-table td{padding:14px 16px}
}

/* ---------- subpages ---------- */
.page-hero{padding:150px 24px 56px;background:
  radial-gradient(900px 380px at 88% -20%,rgba(63,143,196,.14),transparent 60%),
  linear-gradient(180deg,#f6fafc 0%,#fdfdfc 100%)}
.page-hero .en{font-size:.7rem;letter-spacing:.3em;color:var(--sky);font-weight:700}
.page-hero h1{font-family:var(--serif);font-size:clamp(1.7rem,3.4vw,2.4rem);color:var(--navy);letter-spacing:.06em;margin-top:8px}
.crumb{font-size:.78rem;color:var(--gray);margin-top:16px}
.crumb a{color:var(--gray)}
.crumb a:hover{color:var(--sky)}
.gnav a.current{color:var(--sky)}
.gnav a.current::after{right:0}
.more{margin-top:22px;text-align:right}
.more a{font-size:.88rem;font-weight:600;letter-spacing:.04em;border-bottom:1px solid currentColor;padding-bottom:2px}

/* products */
.anchor-nav{display:flex;gap:10px;flex-wrap:wrap;max-width:1080px;margin:28px auto 0;padding:0 24px}
.anchor-nav a{font-size:.82rem;font-weight:600;color:var(--navy);background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 20px;transition:.2s}
.anchor-nav a:hover{border-color:var(--sky);color:var(--sky)}
.attention{max-width:1032px;margin:32px auto 56px;font-size:.8rem;color:var(--gray);background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px 18px}
.series{padding:72px 24px}
.series:nth-of-type(even){background:var(--sky-light)}
.series .cat{font-size:.68rem;letter-spacing:.16em;color:var(--sky);font-weight:700}
.series h2{font-family:var(--serif);font-size:clamp(1.35rem,2.6vw,1.8rem);color:var(--navy);letter-spacing:.06em;margin:6px 0 30px}
.kit-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;align-items:start}
.kit{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px 26px}
.kit h3{font-family:var(--serif);font-size:1.08rem;color:var(--navy);letter-spacing:.04em}
.kit .gname{font-size:.84rem;color:var(--gray);margin-top:6px}
.kit .regno{font-size:.74rem;color:var(--gray);margin-top:2px}
.kit details{margin-top:14px;border-top:1px dashed var(--line);padding-top:12px}
.kit summary{font-size:.82rem;font-weight:600;color:var(--sky);cursor:pointer;letter-spacing:.04em}
.kit table{width:100%;border-collapse:collapse;margin-top:10px;font-size:.82rem}
.kit th,.kit td{padding:8px 10px;border:1px solid var(--line);text-align:left;vertical-align:top}
.kit th{background:#f7fafc;color:var(--navy);white-space:nowrap;width:7.5em;font-weight:600}
.kit .note{font-size:.78rem;color:var(--gray);margin-top:10px}
.pre-release{margin-top:20px;font-size:.86rem;color:var(--gray)}
.pre-release span{background:var(--sky-light);color:var(--navy);border-radius:999px;padding:3px 14px;font-size:.78rem;margin-left:8px}

/* kenkou */
.food{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
.food .kit h3{font-size:1.15rem}
.food .catch{font-size:.86rem;color:var(--sky);font-weight:600;margin-top:6px}
.food dl{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;margin-top:14px;font-size:.84rem}
.food dt{color:var(--navy);font-weight:600;white-space:nowrap}
.food dd{color:var(--gray)}
.food .desc{font-size:.83rem;color:var(--gray);margin-top:14px;border-top:1px dashed var(--line);padding-top:12px}

/* news */
.featured{max-width:1080px;margin:48px auto 0;padding:0 24px}
.featured-inner{background:#fff;border:1px solid var(--line);border-left:4px solid var(--sky);border-radius:12px;padding:30px 34px}
.featured time{font-size:.82rem;color:var(--gray)}
.featured h2{font-family:var(--serif);font-size:1.25rem;color:var(--navy);margin:6px 0 14px;letter-spacing:.04em}
.featured p{font-size:.9rem;color:var(--ink)}
.featured ul{margin:12px 0;font-size:.9rem;color:var(--ink)}
.featured ul li{padding:2px 0}
.filter-tabs{display:flex;gap:8px;max-width:1080px;margin:56px auto 0;padding:0 24px}
.filter-tabs button{font-family:var(--sans);font-size:.82rem;font-weight:600;color:var(--gray);background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 22px;cursor:pointer;transition:.2s}
.filter-tabs button.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.timeline-wrap{max-width:1080px;margin:24px auto 0;padding:0 24px 20px}
.news-note{max-width:1080px;margin:18px auto 0;padding:0 24px;font-size:.76rem;color:var(--gray)}

/* company */
.phil-block{max-width:1080px;margin:0 auto}
.phil-block .statement{font-family:var(--serif);font-size:clamp(1.3rem,2.6vw,1.8rem);color:var(--navy);line-height:2;letter-spacing:.04em}
.phil-cols{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:44px}
.phil-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px 30px}
.phil-card h3{font-size:1rem;color:var(--navy);margin-bottom:12px;padding-bottom:10px;border-bottom:2px solid var(--sky-light)}
.phil-card ol{list-style:none;font-size:.9rem;color:var(--ink)}
.phil-card ol li{padding:7px 0;border-bottom:1px dashed var(--line)}
.phil-card ol li:last-child{border-bottom:none}
.phil-card p{font-size:.9rem;color:var(--ink)}

/* utility pages (howto / privacy / links / en) */
.doc{max-width:840px;margin:0 auto;padding:64px 24px 88px}
.doc h2{font-family:var(--serif);font-size:1.05rem;color:var(--navy);margin:36px 0 12px;padding-left:14px;border-left:3px solid var(--sky)}
.doc h2:first-child{margin-top:0}
.doc p{font-size:.9rem;color:var(--ink);margin:10px 0}
.doc .sub{color:var(--gray);font-size:.84rem}
.doc .sign{text-align:right;color:var(--gray);font-size:.86rem;margin-top:24px}
.link-cols{max-width:1080px;margin:0 auto;padding:56px 24px 88px}
.link-cols h2{font-family:var(--serif);font-size:1.15rem;color:var(--navy);margin:40px 0 18px}
.link-cols h2:first-child{margin-top:0}
.link-cols .note{font-size:.82rem;color:var(--gray);margin-bottom:14px}
.link-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 40px}
.link-grid a{display:block;padding:13px 6px;border-bottom:1px solid var(--line);color:var(--ink);font-size:.9rem;transition:.2s}
.link-grid a:hover{color:var(--sky);padding-left:12px}
.link-grid a::after{content:"↗";color:var(--sky);font-size:.75rem;margin-left:8px}

/* footer nav */
.fnav{display:flex;gap:20px;flex-wrap:wrap}
.fnav a{color:#8ba3b8;font-size:.78rem}
.fnav a:hover{color:#fff}

@media (max-width:840px){
  .kit-grid,.food,.phil-cols,.link-grid{grid-template-columns:1fr}
  .page-hero{padding:120px 24px 44px}
  .series{padding:56px 24px}
  .featured-inner{padding:24px 22px}
}

/* news accordion */
.accordion li{border-bottom:1px solid var(--line)}
.accordion .row{display:flex;gap:22px;align-items:baseline;width:100%;padding:18px 8px;background:none;border:none;font-family:inherit;font-size:inherit;line-height:inherit;text-align:left;color:var(--ink);cursor:pointer;transition:background .2s;flex-wrap:wrap}
.accordion .row:hover{background:#fff}
.accordion .chev{margin-left:auto;color:var(--sky);font-size:.66rem;transition:transform .25s}
.accordion li.open .chev{transform:rotate(180deg)}
.item-body{display:none;padding:2px 8px 26px;font-size:.9rem;color:var(--ink)}
.accordion li.open .item-body{display:block}
.item-body p{margin:8px 0}
.item-body a{color:var(--sky);border-bottom:1px solid currentColor}
.item-body table{border-collapse:collapse;margin:12px 0;font-size:.84rem;background:#fff}
.item-body th,.item-body td{border:1px solid var(--line);padding:6px 12px;text-align:left}
.item-body th{background:#f7fafc;color:var(--navy)}
.item-body img{max-width:100%;height:auto}