*,*::before,*::after{box-sizing:border-box}
:root{
  --ink:#111;
  --grey:#6b6b6b;
  --line:#e6e6e6;
  --soft:#f6f6f4;
  --max:1280px;
  --font:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--ink);background:#fff;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}

/* top bar */
.topbar{border-bottom:1px solid var(--line);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--grey)}
.topbar .wrap{display:flex;justify-content:space-between;height:38px;align-items:center;gap:16px}
.topbar a:hover{color:#111}

/* header */
.head{border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:50}
.head .wrap{display:flex;align-items:center;height:74px;gap:32px}
.logo{font-size:20px;font-weight:700;letter-spacing:.26em;white-space:nowrap}
.logo span{font-weight:400;color:var(--grey)}
.menu{display:flex;gap:30px;margin:0 auto;padding:0;list-style:none;font-size:13px;letter-spacing:.06em}
.menu a{padding:6px 0;border-bottom:1px solid transparent}
.menu a:hover{border-bottom-color:#111}
.head .act{display:flex;align-items:center;gap:18px}
.head .tel{font-size:12px;color:var(--grey);letter-spacing:.04em}
.burger{display:none;background:none;border:0;font-size:20px;cursor:pointer}

/* buttons */
.btn{display:inline-block;background:#111;color:#fff;font-size:12px;letter-spacing:.14em;text-transform:uppercase;padding:14px 26px;border:1px solid #111;transition:.18s}
.btn:hover{background:#fff;color:#111}
.link{display:inline-block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;border-bottom:1px solid #111;padding-bottom:3px}
.link:hover{opacity:.55}

/* hero */
.hero{padding:0 0 56px}
.hero-img{width:100%;height:min(62vh,620px);overflow:hidden;background:var(--soft)}
.hero-img img{width:100%;height:100%;object-fit:cover}
.hero-copy{max-width:760px;padding:44px 0 0}
.hero-copy h1{font-size:clamp(30px,4.4vw,52px);line-height:1.08;letter-spacing:-.02em;font-weight:600;margin:0 0 18px}
.hero-copy p{font-size:16px;color:var(--grey);margin:0 0 26px;max-width:600px}
.hero-copy .cta{display:flex;gap:22px;align-items:center;flex-wrap:wrap}

/* section */
.sec{padding:64px 0;border-top:1px solid var(--line)}
.sec.soft{background:var(--soft);border-top:0}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:34px}
.sec-head h2{font-size:clamp(20px,2.4vw,28px);font-weight:600;letter-spacing:-.01em;margin:0}
.sec-head p{margin:8px 0 0;color:var(--grey);font-size:14px;max-width:560px}
.kicker{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--grey);margin-bottom:10px}

/* product grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px 10px}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.two{grid-template-columns:repeat(2,1fr)}
.pcard{display:block;background:#fff}
.pcard .ph{background:#fff;border:1px solid var(--line);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;overflow:hidden}
.pcard .ph img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.pcard:hover .ph img{transform:scale(1.03)}
.pcard .meta{padding:14px 2px 22px}
.pcard .meta h3{font-size:14px;font-weight:500;margin:0 0 4px}
.pcard .meta .spec{font-size:12px;color:var(--grey);letter-spacing:.02em}
.pcard .meta .cat{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:#999;margin-bottom:6px}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:0}
.split .im{aspect-ratio:4/3;overflow:hidden}
.split .im img{width:100%;height:100%;object-fit:cover}
.split .tx{padding:0 0 0 56px}
.split.rev .tx{padding:0 56px 0 0;order:-1}
.split h2{font-size:clamp(22px,2.6vw,30px);font-weight:600;margin:0 0 16px;letter-spacing:-.01em}
.split p{color:var(--grey);margin:0 0 18px}
.split ul{margin:0 0 24px;padding:0;list-style:none}
.split li{font-size:14px;padding:9px 0;border-bottom:1px solid var(--line)}
.split li:last-child{border:0}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.stats div{background:#fff;padding:26px 22px}
.stats b{display:block;font-size:24px;font-weight:600;letter-spacing:-.01em}
.stats span{font-size:12px;color:var(--grey);letter-spacing:.06em}

/* cta band */
.band{background:#111;color:#fff;padding:72px 0}
.band .wrap{display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap}
.band h2{font-size:clamp(22px,2.6vw,30px);margin:0 0 8px;font-weight:600}
.band p{margin:0;color:#a9a9a9;font-size:14px}
.band .btn{background:#fff;color:#111;border-color:#fff}
.band .btn:hover{background:transparent;color:#fff}

/* page hero */
.phero{padding:52px 0 36px;border-bottom:1px solid var(--line)}
.phero .crumb{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--grey);margin-bottom:16px}
.phero h1{font-size:clamp(26px,3.6vw,44px);font-weight:600;letter-spacing:-.02em;margin:0 0 14px;line-height:1.1}
.phero p{margin:0;color:var(--grey);max-width:640px}

/* cat nav */
.catnav{display:flex;gap:26px;flex-wrap:wrap;padding:20px 0;border-bottom:1px solid var(--line);font-size:13px;letter-spacing:.04em}
.catnav a{color:var(--grey);padding-bottom:4px;border-bottom:1px solid transparent}
.catnav a:hover{color:#111;border-bottom-color:#111}

/* product detail */
.pd{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;padding:48px 0 64px}
.pd .gal{background:#fff;border:1px solid var(--line);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center}
.pd .gal img{width:100%;height:100%;object-fit:cover}
.pd h1{font-size:clamp(24px,2.8vw,34px);font-weight:600;letter-spacing:-.01em;margin:0 0 10px}
.pd .lead{color:var(--grey);margin:0 0 26px}
.pd .order-note{font-size:13px;letter-spacing:.06em;color:var(--grey);margin-bottom:22px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.spec-table{width:100%;border-collapse:collapse;margin:0 0 28px;font-size:13px}
.spec-table th,.spec-table td{text-align:left;padding:11px 0;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table th{width:42%;font-weight:400;color:var(--grey)}
.spec-table td{font-weight:500}
.note{font-size:12px;color:var(--grey);margin:14px 0 0}

/* form */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--grey)}
.field.full{grid-column:1/-1}
.field input,.field select,.field textarea{border:1px solid var(--line);padding:12px 14px;font-family:var(--font);font-size:14px;color:#111;background:#fff}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:#111}
.hp{position:absolute;left:-9999px}

/* footer */
.foot{border-top:1px solid var(--line);padding:56px 0 28px;margin-top:0}
.fcols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.fcols h4{font-size:11px;letter-spacing:.14em;text-transform:uppercase;margin:0 0 14px;color:#111}
.fcols a,.fcols p{display:block;font-size:13px;color:var(--grey);margin:0 0 9px;line-height:1.6}
.fcols a:hover{color:#111}
.flogo{font-size:18px;font-weight:700;letter-spacing:.24em;margin-bottom:14px}
.fbot{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);margin-top:44px;padding-top:20px;font-size:11px;letter-spacing:.08em;color:#999;text-transform:uppercase}

@media(max-width:1024px){
  .grid{grid-template-columns:repeat(3,1fr)}
  .pd{grid-template-columns:1fr;gap:32px}
  .split,.split.rev{grid-template-columns:1fr}
  .split .tx,.split.rev .tx{padding:32px 0 0;order:0}
  .fcols{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .menu{display:none}
  .burger{display:block;flex:0 0 auto}
  .head .tel{display:none}
  .head .wrap{gap:10px;height:64px;min-width:0}
  .head .act{gap:8px;flex:0 0 auto;margin-left:auto}
  .head .act .btn{display:none}
  .logo{font-size:17px;letter-spacing:.18em;flex:0 0 auto}
  .topbar .wrap{height:auto;min-height:32px;padding:7px 18px;flex-direction:column;align-items:flex-start;gap:2px;line-height:1.35}
  .topbar .wrap>span{white-space:normal;overflow-wrap:anywhere}
  .topbar .wrap>span:last-child{display:none}
  .grid,.grid.three,.grid.two{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:1fr 1fr}
  .hero-img{height:42vh}
  .hero-copy{padding-top:28px}
  .form-grid{grid-template-columns:1fr}
  .fcols{grid-template-columns:1fr}
  .wrap{padding:0 18px}
  .split .tx,.split.rev .tx{padding:26px 0 0!important}
  .pd{padding-top:26px}
  .band .wrap{flex-direction:column;align-items:flex-start;gap:20px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:10px}
}

/* ---- nav dropdown (vertsa-style structure) ---- */
.menu li{position:relative}
.menu .caret{display:inline-block;width:0;height:0;font-size:0;overflow:hidden;margin-left:6px;vertical-align:2px;
  border-left:3.5px solid transparent;border-right:3.5px solid transparent;border-top:4.5px solid #999}
.m-cta{display:none}
.menu .sub{position:absolute;top:100%;left:-16px;min-width:220px;background:#fff;border:1px solid var(--line);
  box-shadow:0 18px 40px rgba(0,0,0,.08);padding:8px 0;margin:0;list-style:none;display:none;z-index:70}
.menu .has-sub:hover>.sub,.menu .has-sub:focus-within>.sub{display:block}
.menu .sub li{display:block}
.menu .sub a{display:block;padding:9px 20px;border-bottom:0;font-size:12.5px;letter-spacing:.04em;white-space:nowrap}
.menu .sub a:hover{background:var(--soft);border-bottom:0}

/* ---- faq ---- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-size:15px;font-weight:500;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:#999;font-weight:400}
.faq details[open] summary::after{content:"\2013"}
.faq p{margin:12px 0 0;color:var(--grey);font-size:14px;max-width:820px}

/* ---- wa button ---- */
.btn.wa{border-color:#111;display:inline-flex;align-items:center;gap:8px}
.btn.wa svg{width:14px;height:14px;fill:currentColor}

@media(max-width:760px){
  .menu.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fff;
    border-bottom:1px solid var(--line);padding:16px 18px 20px;gap:2px;margin:0;z-index:60}
  .menu.open>li{width:100%}
  .menu.open .sub{position:static;display:block;border:0;box-shadow:none;padding:2px 0 6px 14px;background:transparent}
  .menu.open .sub a{padding:7px 0}
  .menu .sub{min-width:0}
  .menu.open .m-cta{display:block;margin:10px 0 0}
  .menu.open .m-cta a{display:block;background:#111;color:#fff;text-align:center;
    padding:13px 0;font-size:12px;letter-spacing:.14em;text-transform:uppercase}
}

/* ---- 7-column nav: keep one line on narrow desktops ---- */
@media(max-width:1180px){
  .head .wrap{gap:20px}
  .menu{gap:20px}
  .head .tel{display:none}
}
@media(max-width:980px){
  .menu{font-size:12px;gap:13px}
  .logo{font-size:18px;letter-spacing:.18em}
  .head .act .btn{padding:12px 16px;font-size:11px}
}