:root{
  --blue:#1d5a9e; --blue-d:#14407a; --navy:#0c2240; --ink:#18212f; --muted:#5a667a;
  --line:#e2e7ee; --bg:#f4f6f9; --white:#fff; --accent:#e8a317;
  --r:10px; --maxw:1180px;
  --font:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans","Yu Gothic","Meiryo","Malgun Gothic","Apple SD Gothic Neo","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
h1,h2,h3,p,li{overflow-wrap:break-word;hyphens:auto}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.65;-webkit-font-smoothing:antialiased}
img,video{max-width:100%;display:block}
img{height:auto}
:lang(ja),:lang(zh-CN){line-break:strict}
:lang(ko){word-break:keep-all}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;margin:0 0 .5em;color:var(--navy)}
h1{font-size:clamp(1.9rem,4.2vw,3rem);letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,2.8vw,2.1rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section.alt{background:var(--bg)}
.section-head{max-width:720px;margin-bottom:36px}
.section-head p{color:var(--muted);font-size:1.05rem}
.eyebrow{font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:.8rem}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:700}
.brand:hover{text-decoration:none}
.brand img{height:40px;width:auto}
.brand span{font-size:1.02rem;white-space:nowrap}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{white-space:nowrap}
.nav a{color:var(--ink);padding:8px 12px;border-radius:6px;font-size:.95rem}
.nav a:hover{background:var(--bg);text-decoration:none}
.nav a.active{color:var(--blue);font-weight:600}
.nav .btn{margin-left:8px;color:#fff}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 10px;font-size:1rem;cursor:pointer}

/* language switcher */
.lang{position:relative}
.lang-btn{display:flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:7px 10px;font:inherit;font-size:.9rem;color:var(--ink);cursor:pointer}
.lang-btn:hover{background:var(--bg)}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:210px;margin:0;padding:6px;list-style:none;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 32px rgba(12,34,64,.16);z-index:60}
.lang-menu[hidden]{display:none}
.lang-menu a{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:6px;color:var(--ink);font-size:.95rem}
.lang-menu a:hover{background:var(--bg);text-decoration:none}
.lang-menu a[aria-current]{font-weight:700;color:var(--blue)}
.lang-menu img{width:20px;height:15px;border-radius:2px;box-shadow:0 0 0 1px rgba(0,0,0,.12);object-fit:cover;flex:none}

/* buttons */
.btn{display:inline-block;background:var(--blue);color:#fff;border:0;border-radius:8px;padding:12px 24px;font-size:1rem;font-weight:600;cursor:pointer;font-family:inherit}
.btn:hover{background:var(--blue-d);text-decoration:none}
.btn.ghost{background:transparent;border:1.5px solid rgba(255,255,255,.55);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.btn.outline{background:#fff;border:1.5px solid var(--blue);color:var(--blue)}
.btn.outline:hover{background:var(--bg)}
.btn.sm{padding:8px 16px;font-size:.92rem}
.btn.accent{background:var(--accent);color:#1a1a1a}
.btn.accent:hover{background:#cf8f0f}

/* hero */
.hero{background:linear-gradient(135deg,var(--navy),#143b6e 70%);color:#fff;padding:64px 0}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.hero h1{color:#fff}
.hero p.sub{font-size:1.1rem;color:#c9d6ea;max-width:34em}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.video-box{border-radius:var(--r);overflow:hidden;background:#000;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.video-box video{width:100%;aspect-ratio:960/544;background:#000}
.video-cap{font-size:.85rem;color:#9fb3d1;margin-top:10px}

/* stats */
.stats{background:var(--white);border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:28px 16px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:2rem;color:var(--blue);line-height:1.1}
.stat span{font-size:.9rem;color:var(--muted)}

/* cards */
.grid{display:grid;gap:24px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.three{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column}
.card .media{background:#fff;padding:18px;border-bottom:1px solid var(--line);aspect-ratio:16/9;display:flex;align-items:center;justify-content:center}
.card .media img{max-height:100%;width:auto;object-fit:contain}
.card .body{padding:22px;display:flex;flex-direction:column;gap:6px;flex:1}
.card .body p{color:var(--muted);margin:0 0 8px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 14px}
.chip{background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:3px 12px;font-size:.88rem;color:var(--navy);font-weight:600}
.chip:hover{background:#e8eef7;text-decoration:none}
.card .body .btn{align-self:flex-start;margin-top:auto}
.tag{display:inline-block;font-size:.78rem;background:#e8eef7;color:var(--blue-d);padding:2px 10px;border-radius:999px;font-weight:600}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
thead th{background:#eaf0f8;color:var(--navy);font-weight:700}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody tr:hover{background:#fafcff}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.spec th{font-weight:500;color:var(--ink);background:#fff;width:34%}
.spec th small{display:block;color:var(--muted);font-size:.78rem;font-weight:400}
.spec td{font-weight:600;color:var(--navy)}
.spec .unit{color:var(--muted);font-weight:400;width:70px}
.cmp th:first-child,.cmp td:first-child{position:sticky;left:0;background:#fff;z-index:1;border-right:1px solid var(--line)}
.cmp thead th:first-child{background:#eaf0f8}

/* product page */
.crumbs{font-size:.88rem;color:var(--muted);padding:18px 0}
.crumbs a{color:var(--muted)}
.p-hero{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:start;padding-bottom:48px}
.p-media{border:1px solid var(--line);border-radius:var(--r);padding:20px;background:#fff}
.kpis{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:20px 0 24px}
.kpi{background:var(--bg);border-radius:8px;padding:14px 16px}
.kpi small{display:block;color:var(--muted);font-size:.8rem}
.kpi b{font-size:1.25rem;color:var(--navy)}
.lead{font-size:1.1rem;color:var(--muted)}
.parts{columns:2;gap:24px;padding-left:1.2em;margin:0}
.parts li{margin-bottom:8px;break-inside:avoid}
.parts small{color:var(--muted);display:block}
.feat{padding-left:1.2em}
.feat li{margin-bottom:8px}
.note{font-size:.85rem;color:var(--muted);margin-top:14px}
.acc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.acc{border:1px solid var(--line);border-radius:var(--r);background:#fff;text-align:center;padding:14px}
.acc img{height:130px;width:100%;object-fit:contain;margin-bottom:10px}
.acc b{display:block;color:var(--navy)}
.acc small{color:var(--muted)}
.video-box.light{box-shadow:none;border:1px solid var(--line)}

/* about */
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split img{border-radius:var(--r)}
.addr-grid{display:grid;grid-template-columns:1fr;gap:20px;max-width:560px}
.box{border:1px solid var(--line);border-radius:var(--r);padding:20px;background:#fff}
.box small{display:block;color:var(--muted)}

/* cta */
.cta{background:var(--navy);color:#fff;padding:56px 0;text-align:center}
.cta h2{color:#fff}
.cta p{color:#c9d6ea;margin-bottom:24px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:40px}
.info-list{list-style:none;padding:0;margin:0}
.info-list li{padding:14px 0;border-bottom:1px solid var(--line)}
.info-list small{display:block;color:var(--muted);font-size:.82rem}
.info-list b{font-size:1.05rem;color:var(--navy)}
form.inq{display:grid;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px}
form.inq .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
form.inq label{display:grid;gap:6px;font-size:.9rem;font-weight:600;color:var(--navy)}
form.inq input,form.inq select,form.inq textarea{font:inherit;font-weight:400;padding:10px 12px;border:1px solid #c9d2de;border-radius:8px;background:#fff;color:var(--ink);width:100%}
form.inq input:focus,form.inq select:focus,form.inq textarea:focus{outline:2px solid #9bbbe3;border-color:var(--blue)}
form.inq textarea{min-height:130px;resize:vertical}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}
.form-msg{padding:12px 14px;border-radius:8px;font-size:.95rem;display:none}
.form-msg.ok{display:block;background:#e8f5ea;color:#1c5a2b}
.form-msg.err{display:block;background:#fdecea;color:#8a1f17}
.inq-inline{margin-top:48px}

/* footer */
.site-footer{background:#0a1a30;color:#aebbd0;padding:48px 0 24px;font-size:.92rem}
.site-footer a{color:#d6e2f4}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:28px}
.site-footer h4{color:#fff;margin:0 0 12px;font-size:1rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:6px}
.copy{border-top:1px solid #1d3354;padding-top:18px;font-size:.82rem}

@media (max-width:900px){
  .section{padding:52px 0}
  .hero .wrap,.p-hero,.split,.contact-grid{grid-template-columns:1fr}
  .grid.two,.grid.three{grid-template-columns:1fr}
  .acc-grid{grid-template-columns:repeat(2,1fr)}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .foot-grid{grid-template-columns:1fr}
  .parts{columns:1}
  .nav-toggle{display:block;margin-left:0}
  .lang{margin-left:auto}
  .site-header .wrap{gap:12px}
  .lang-cur{display:none}
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 18px;margin:0}
  .nav.open{display:flex}
  .nav .btn{margin:8px 0 0;text-align:center}
  form.inq .row,.addr-grid{grid-template-columns:1fr}
  .brand span{font-size:.92rem}
}