/* ============================================================
   Dimei Dental — Design System
   Palette: deep navy · porcelain teal · champagne gold
   ============================================================ */
:root{
  --navy-900:#061726;
  --navy-800:#0A2237;
  --navy-700:#0E2F49;
  --navy-600:#164260;
  --teal-600:#0B7F7B;
  --teal-500:#12A5A0;
  --teal-400:#3FC0BA;
  --teal-50:#EAF7F6;
  --gold-600:#A9843F;
  --gold-500:#C8A96A;
  --gold-400:#DBBE86;
  --gold-50:#FAF4E8;
  --ink-900:#0D1A24;
  --ink-700:#33454F;
  --ink-500:#5C6E78;
  --ink-300:#9AAAB2;
  --line:#E3E9EC;
  --bg:#FFFFFF;
  --bg-soft:#F5F8FA;
  --bg-mist:#EFF5F7;
  --radius-s:6px;
  --radius:10px;
  --radius-l:18px;
  --shadow-s:0 1px 2px rgba(13,26,36,.06),0 2px 8px rgba(13,26,36,.05);
  --shadow:0 4px 14px rgba(13,26,36,.07),0 14px 40px rgba(13,26,36,.07);
  --shadow-l:0 10px 30px rgba(6,23,38,.12),0 30px 70px rgba(6,23,38,.12);
  --maxw:1240px;
  --font:"Inter","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html,body{overflow-x:hidden;max-width:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink-900);background:var(--bg);
  font-size:16px;line-height:1.75;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em;color:var(--navy-900)}
p{margin:0}
button{font-family:inherit}
::selection{background:var(--teal-500);color:#fff}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 28px}
.wrap-narrow{max-width:940px}
.sec{padding:104px 0}
.sec-sm{padding:72px 0}
.sec-dark{background:var(--navy-900);color:#E8EFF3}
.sec-soft{background:var(--bg-soft)}
.sec-mist{background:var(--bg-mist)}
.sec-line{border-top:1px solid var(--line)}

/* ---------- eyebrow / headings ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--teal-600);margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--gold-500)}
.sec-dark .eyebrow{color:var(--teal-400)}
.sec-dark .eyebrow::before{background:var(--gold-400)}
h2.sec-title{font-size:clamp(26px,3.4vw,42px);letter-spacing:-.02em}
.sec-lead{margin-top:20px;font-size:17px;color:var(--ink-700);max-width:760px}
.sec-dark .sec-lead{color:#A9BDC8}
.sec-head{margin-bottom:56px}
.sec-head.center{text-align:center}
.sec-head.center .sec-lead{margin-left:auto;margin-right:auto}
.sec-head.center .eyebrow{justify-content:center}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:15px 30px;border-radius:var(--radius-s);border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.02em;cursor:pointer;
  transition:.28s cubic-bezier(.22,.61,.36,1);white-space:nowrap;
}
.btn-gold{background:linear-gradient(180deg,var(--gold-400),var(--gold-500));color:#241A05;box-shadow:0 6px 18px rgba(200,169,106,.32)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(200,169,106,.42)}
.btn-navy{background:var(--navy-800);color:#fff}
.btn-navy:hover{background:var(--navy-700);transform:translateY(-2px);box-shadow:0 12px 26px rgba(10,34,55,.28)}
.btn-teal{background:var(--teal-600);color:#fff}
.btn-teal:hover{background:var(--teal-500);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.6)}
.btn-outline{border-color:var(--line);color:var(--navy-800);background:#fff}
.btn-outline:hover{border-color:var(--teal-500);color:var(--teal-600);transform:translateY(-2px)}
.btn-sm{padding:11px 18px;font-size:13.5px}
.btn-lg{padding:18px 38px;font-size:16px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--teal-600);font-size:15px}
.link-arrow svg{transition:transform .28s}
.link-arrow:hover svg{transform:translateX(5px)}

/* ---------- topbar + header ---------- */
.topbar{background:var(--navy-900);color:#9FB4C0;font-size:12.5px;border-bottom:1px solid rgba(255,255,255,.07)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:40px}
.topbar-l{display:flex;align-items:center;gap:22px}
.topbar span{display:inline-flex;align-items:center;gap:7px;white-space:nowrap}
.topbar svg{opacity:.7;flex:none}
.topbar a:hover{color:var(--gold-400)}
.lang-switch{display:inline-flex;align-items:center;gap:2px;border:1px solid rgba(255,255,255,.16);border-radius:4px;overflow:hidden}
.lang-switch a{padding:4px 11px;font-size:12px;font-weight:600;letter-spacing:.06em;color:#9FB4C0}
.lang-switch a.on{background:var(--gold-500);color:#241A05}
.lang-switch a:hover{color:#fff}
.lang-switch a.on:hover{color:#241A05}

.site-header{position:sticky;top:0;z-index:90;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:.3s}
.site-header.solid{box-shadow:0 2px 20px rgba(13,26,36,.08)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:76px;flex-wrap:nowrap}
.logo{display:flex;align-items:center;gap:13px;flex:0 0 auto;max-width:100%}
.logo-txt{min-width:0}
.logo-mark{
  width:44px;height:44px;flex:none;border-radius:9px;
  background:linear-gradient(145deg,var(--navy-700),var(--navy-900));
  display:grid;place-items:center;position:relative;overflow:hidden;
}
.logo-mark::after{content:"";position:absolute;inset:0;background:linear-gradient(145deg,transparent 55%,rgba(200,169,106,.5));opacity:.9}
.logo-mark svg{position:relative;z-index:2}
.logo-txt b{display:block;font-size:17px;font-weight:800;color:var(--navy-900);letter-spacing:.02em;line-height:1.2;white-space:nowrap}
.logo-txt i{display:block;font-style:normal;font-size:10px;font-weight:600;letter-spacing:.14em;color:var(--ink-300);text-transform:uppercase;margin-top:2px}

.nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;justify-content:center;min-width:0}
.nav{flex-wrap:nowrap;overflow:hidden}
.nav>li>a{
  display:block;padding:10px 11px;font-size:14px;font-weight:600;color:var(--ink-700);
  border-radius:5px;transition:.2s;position:relative;white-space:nowrap;
}
.nav>li>a:hover{color:var(--navy-900);background:var(--bg-mist)}
.nav>li>a.on{color:var(--teal-600)}
.nav>li>a.on::after{content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;background:var(--gold-500);border-radius:2px}
.head-act{display:flex;align-items:center;gap:10px;flex:none}
.head-tel{display:flex;flex-direction:column;line-height:1.25;text-align:right}
.head-tel i{font-style:normal;font-size:10.5px;color:var(--ink-300);letter-spacing:.1em;text-transform:uppercase}
.head-tel b{font-size:15px;color:var(--navy-900);font-weight:800;letter-spacing:.01em;white-space:nowrap}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:6px;cursor:pointer;align-items:center;justify-content:center}
.burger span{display:block;width:18px;height:2px;background:var(--navy-800);position:relative;border-radius:2px}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--navy-800);border-radius:2px;transition:.25s}
.burger span::before{top:-6px}.burger span::after{top:6px}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--navy-900);color:#fff;overflow:hidden;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-1}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center 42%;opacity:.42;transform:scale(1.04)}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(100deg,rgba(6,23,38,.95) 0%,rgba(6,23,38,.82) 42%,rgba(6,23,38,.44) 100%),
    radial-gradient(120% 90% at 88% 12%,rgba(18,165,160,.28),transparent 62%);
}
.hero-inner{position:relative;padding:132px 0 118px;max-width:820px}
.hero h1{font-size:clamp(32px,4.8vw,60px);color:#fff;letter-spacing:-.025em;line-height:1.14}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(96deg,var(--gold-400),#F0DDB4 55%,var(--gold-500));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .hero-lead{margin-top:26px;font-size:17.5px;line-height:1.85;color:#B9CBD5;max-width:660px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:100px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  font-size:12.5px;font-weight:600;color:#D6E3EA;letter-spacing:.03em;backdrop-filter:blur(6px);
}
.hero-badge svg{color:var(--gold-400)}

/* ---------- stat strip ---------- */
.stats{position:relative;z-index:5;margin-top:-52px}
.stats-inner{
  background:#fff;border-radius:var(--radius-l);box-shadow:var(--shadow-l);
  display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;border:1px solid var(--line);
}
.stat{padding:34px 30px;position:relative}
.stat+.stat::before{content:"";position:absolute;left:0;top:24px;bottom:24px;width:1px;background:var(--line)}
.stat b{display:block;font-family:var(--font-num);font-size:clamp(30px,3.4vw,42px);font-weight:800;color:var(--navy-900);letter-spacing:-.03em;line-height:1}
.stat b i{font-style:normal;font-size:.5em;font-weight:700;color:var(--gold-500);margin-left:3px;letter-spacing:0}
.stat span{display:block;margin-top:10px;font-size:13.5px;color:var(--ink-500);font-weight:500}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);
  overflow:hidden;transition:.34s cubic-bezier(.22,.61,.36,1);position:relative;display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-l);border-color:rgba(18,165,160,.34)}
.card-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--navy-900)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.22,.61,.36,1)}
.card:hover .card-img img{transform:scale(1.07)}
.card-tag{
  position:absolute;top:14px;left:14px;z-index:3;padding:5px 12px;border-radius:4px;
  background:linear-gradient(180deg,var(--gold-400),var(--gold-500));color:#241A05;
  font-size:11.5px;font-weight:800;letter-spacing:.06em;
}
.card-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:19px;margin-bottom:9px}
.card-sub{font-size:12.5px;color:var(--teal-600);font-weight:700;letter-spacing:.04em;margin-bottom:12px}
.card-body p{font-size:14.5px;color:var(--ink-500);line-height:1.8;flex:1}
.card-foot{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}

/* ---------- feature tiles ---------- */
.tile{padding:34px 30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);transition:.3s}
.tile:hover{border-color:rgba(18,165,160,.36);box-shadow:var(--shadow);transform:translateY(-4px)}
.tile-ico{
  width:52px;height:52px;border-radius:11px;display:grid;place-items:center;margin-bottom:20px;
  background:linear-gradient(145deg,var(--teal-50),#fff);border:1px solid rgba(18,165,160,.2);color:var(--teal-600);
}
.tile h3{font-size:18px;margin-bottom:10px}
.tile p{font-size:14.5px;color:var(--ink-500);line-height:1.8}

/* ---------- split (image + text) ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.split.flip .split-media{order:2}
.split-media{position:relative;border-radius:var(--radius-l);overflow:hidden;box-shadow:var(--shadow-l)}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(6,23,38,.06),rgba(6,23,38,.34));
}
.split-media-cap{
  position:absolute;left:22px;bottom:22px;z-index:3;color:#fff;
  font-size:13px;font-weight:600;letter-spacing:.04em;display:flex;align-items:center;gap:9px;
}
.split-media-cap::before{content:"";width:22px;height:1px;background:var(--gold-500)}
.split-list{margin-top:28px;display:grid;gap:16px}
.split-list li{display:flex;gap:14px;font-size:15px;color:var(--ink-700);line-height:1.75}
.split-list li svg{flex:none;margin-top:5px;color:var(--teal-500)}

/* ---------- spec table ---------- */
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-s)}
.spec-table tr{border-bottom:1px solid var(--line)}
.spec-table tr:last-child{border-bottom:0}
.spec-table tr:nth-child(odd){background:var(--bg-soft)}
.spec-table th{
  width:210px;text-align:left;padding:17px 22px;font-weight:700;color:var(--navy-800);
  vertical-align:top;font-size:13.5px;letter-spacing:.02em;
}
.spec-table td{padding:17px 22px;color:var(--ink-700)}
.spec-table-sm th{width:150px}

/* ---------- list rows ---------- */
.rows{display:grid;gap:0;border-top:1px solid var(--line)}
.rows li{display:grid;grid-template-columns:64px 1fr;gap:24px;padding:30px 0;border-bottom:1px solid var(--line);transition:.25s}
.rows li:hover{background:var(--bg-soft);padding-left:14px;padding-right:14px}
.rows .n{font-family:var(--font-num);font-size:26px;font-weight:800;color:var(--line);letter-spacing:-.02em;line-height:1.3}
.rows li:hover .n{color:var(--gold-500)}
.rows h3{font-size:18px;margin-bottom:8px}
.rows p{font-size:14.5px;color:var(--ink-500);line-height:1.8}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:20px}
.timeline::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:1px;background:linear-gradient(180deg,var(--gold-500),var(--teal-500),transparent)}
.tl-item{position:relative;padding:0 0 40px 44px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-5px;top:8px;width:11px;height:11px;border-radius:50%;
  background:#fff;border:2px solid var(--teal-500);box-shadow:0 0 0 4px rgba(18,165,160,.12);
}
.tl-year{font-family:var(--font-num);font-size:19px;font-weight:800;color:var(--gold-600);letter-spacing:.02em;margin-bottom:6px}
.tl-item h3{font-size:16.5px;margin-bottom:7px}
.tl-item p{font-size:14.5px;color:var(--ink-500);line-height:1.8}

/* ---------- filters ---------- */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:42px}
.fbtn{
  padding:10px 22px;border-radius:100px;border:1px solid var(--line);background:#fff;
  font-size:14px;font-weight:600;color:var(--ink-700);cursor:pointer;transition:.26s;font-family:inherit;
}
.fbtn:hover{border-color:var(--teal-500);color:var(--teal-600)}
.fbtn.on{background:var(--navy-800);border-color:var(--navy-800);color:#fff;box-shadow:0 6px 16px rgba(10,34,55,.2)}
.cat-group{margin-bottom:14px}
.cat-title{display:flex;align-items:center;gap:14px;margin:0 0 26px;font-size:20px}
.cat-title span{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--gold-600);letter-spacing:.1em;text-transform:uppercase}
.cat-title::after{content:"";flex:1;height:1px;background:var(--line)}

/* ---------- cert cards ---------- */
.cert{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;transition:.3s;position:relative;overflow:hidden}
.cert::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:linear-gradient(180deg,var(--gold-500),var(--teal-500));opacity:0;transition:.3s}
.cert:hover{box-shadow:var(--shadow);transform:translateY(-4px);border-color:rgba(18,165,160,.3)}
.cert:hover::before{opacity:1}
.cert-no{margin-top:14px;font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--teal-600);letter-spacing:.03em;background:var(--teal-50);display:inline-block;padding:4px 10px;border-radius:4px}
.cert h3{font-size:16.5px;margin-bottom:6px}
.cert-cat{font-size:12.5px;color:var(--ink-300);font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.cert p{margin-top:12px;font-size:14px;color:var(--ink-500);line-height:1.8}

/* ---------- CTA band ---------- */
.cta{
  position:relative;background:linear-gradient(120deg,var(--navy-900),var(--navy-700) 58%,var(--teal-600));
  border-radius:var(--radius-l);padding:66px 62px;color:#fff;overflow:hidden;isolation:isolate;
}
.cta::before{
  content:"";position:absolute;right:-90px;top:-90px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(200,169,106,.26),transparent 68%);z-index:-1;
}
.cta::after{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(200,169,106,.6),transparent);
}
.cta-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:56px;align-items:center;position:relative}
.cta h2{color:#fff;font-size:clamp(24px,3vw,36px);letter-spacing:-.02em}
.cta p{margin-top:18px;color:#B9CBD5;font-size:16px;line-height:1.85}
.cta-panel{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:30px 28px;backdrop-filter:blur(8px)}
.cta-panel dl{margin:0;display:grid;gap:15px}
.cta-panel dt{font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold-400);font-weight:700}
.cta-panel dd{margin:4px 0 0;font-size:16px;font-weight:700;color:#fff;letter-spacing:.01em}

/* ---------- page hero (inner pages) ---------- */
.phero{position:relative;background:var(--navy-900);color:#fff;overflow:hidden;isolation:isolate}
.phero-bg{position:absolute;inset:0;z-index:-1}
.phero-bg img{width:100%;height:100%;object-fit:cover;opacity:.3}
.phero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(6,23,38,.94) 0%,rgba(6,23,38,.76) 55%,rgba(6,23,38,.5) 100%)}
.phero-inner{padding:86px 0 76px;max-width:800px;position:relative}
.phero h1{color:#fff;font-size:clamp(28px,3.8vw,46px);letter-spacing:-.022em}
.phero p{margin-top:20px;color:#A9BDC8;font-size:16.5px;line-height:1.85;max-width:680px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:12.5px;color:#7C93A0;margin-bottom:22px}
.crumb a:hover{color:var(--gold-400)}
.crumb i{font-style:normal;opacity:.5}
.crumb b{color:#C9D8E0;font-weight:600}

/* ---------- product detail ---------- */
.pd-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.pd-media{border-radius:var(--radius-l);overflow:hidden;background:var(--navy-900);box-shadow:var(--shadow-l);position:sticky;top:100px}
.pd-media img{width:100%;aspect-ratio:1/1;object-fit:cover}
.pd-h{font-size:clamp(24px,3vw,36px);letter-spacing:-.02em;margin-bottom:10px}
.pd-sub{font-size:13.5px;font-weight:700;color:var(--teal-600);letter-spacing:.05em;margin-bottom:22px}
.pd-digest{font-size:16px;color:var(--ink-700);line-height:1.9}
.pd-points{margin-top:34px;display:grid;gap:20px}
.pd-points li{display:grid;grid-template-columns:28px 1fr;gap:14px}
.pd-points .pi{width:28px;height:28px;border-radius:50%;background:var(--teal-50);display:grid;place-items:center;color:var(--teal-600);flex:none}
.pd-points h4{font-size:15.5px;margin-bottom:5px}
.pd-points p{font-size:14.5px;color:var(--ink-500);line-height:1.8}

/* ---------- FAQ accordion ---------- */
.faq{display:grid;gap:12px;margin-top:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.28s}
.faq details[open]{border-color:rgba(18,165,160,.36);box-shadow:var(--shadow)}
.faq summary{
  cursor:pointer;list-style:none;padding:22px 60px 22px 26px;position:relative;
  font-size:16px;font-weight:700;color:var(--navy-900);line-height:1.6;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:26px;top:50%;width:12px;height:12px;margin-top:-7px;
  border-right:2px solid var(--teal-600);border-bottom:2px solid var(--teal-600);
  transform:rotate(45deg);transition:.3s;
}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:-2px}
.faq summary:hover{color:var(--teal-600)}
.faq-a{padding:0 26px 26px;font-size:15px;color:var(--ink-700);line-height:1.9;border-top:1px solid var(--line);padding-top:22px}
.faq-a strong{color:var(--navy-800)}

/* ---------- form ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);padding:38px;box-shadow:var(--shadow)}
.field{margin-bottom:20px}
.field label{display:block;font-size:13.5px;font-weight:700;color:var(--navy-800);margin-bottom:8px;letter-spacing:.02em}
.field label i{font-style:normal;color:#C0392B;margin-left:3px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:var(--radius-s);
  font-family:inherit;font-size:14.5px;color:var(--ink-900);background:#fff;transition:.2s;
}
.field textarea{min-height:132px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--teal-500);box-shadow:0 0 0 3px rgba(18,165,160,.12)}
.form-note{font-size:12.5px;color:var(--ink-300);line-height:1.7;margin-top:14px}
.form-msg{display:none;margin-top:18px;padding:14px 18px;border-radius:var(--radius-s);background:var(--teal-50);border:1px solid rgba(18,165,160,.3);color:var(--teal-600);font-size:14px;font-weight:600}
.form-msg.show{display:block}

/* ---------- contact blocks ---------- */
.cinfo{display:grid;gap:18px}
.cinfo-item{display:grid;grid-template-columns:46px 1fr;gap:18px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.3s}
.cinfo-item:hover{border-color:rgba(18,165,160,.34);box-shadow:var(--shadow-s)}
.cinfo-ico{width:46px;height:46px;border-radius:9px;background:var(--teal-50);display:grid;place-items:center;color:var(--teal-600)}
.cinfo-item h4{font-size:14px;margin-bottom:5px}
.cinfo-item p{font-size:15px;color:var(--ink-700);line-height:1.7;word-break:break-word}
.cinfo-item small{display:block;margin-top:5px;font-size:12.5px;color:var(--ink-300)}

/* ---------- news ---------- */
.news-item{display:grid;grid-template-columns:110px 1fr;gap:30px;padding:32px 0;border-bottom:1px solid var(--line);transition:.25s}
.news-item:hover{padding-left:14px;padding-right:14px;background:var(--bg-soft)}
.news-date{font-family:var(--font-num);text-align:left}
.news-date b{display:block;font-size:27px;font-weight:800;color:var(--navy-900);letter-spacing:-.02em;line-height:1}
.news-date span{display:block;margin-top:6px;font-size:12.5px;color:var(--ink-300);font-weight:600;letter-spacing:.06em}
.news-item h3{font-size:18.5px;margin-bottom:10px}
.news-item h3 a:hover{color:var(--teal-600)}
.news-item p{font-size:14.5px;color:var(--ink-500);line-height:1.85}
.news-meta{display:flex;gap:16px;margin-top:14px;font-size:12.5px;color:var(--ink-300);font-weight:600}
.news-meta span{display:inline-flex;align-items:center;gap:6px}

/* ---------- table of contents ---------- */
.toc{background:var(--bg-soft);border:1px solid var(--line);border-left:3px solid var(--gold-500);border-radius:var(--radius);padding:24px 26px}
.toc h4{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-300);margin-bottom:14px}
.toc ol{counter-reset:t;display:grid;gap:9px}
.toc li{counter-increment:t;font-size:14.5px;color:var(--ink-700)}
.toc li::before{content:counter(t) ".";color:var(--gold-600);font-weight:700;margin-right:9px}
.toc a:hover{color:var(--teal-600)}

/* ---------- footer ---------- */
.footer{background:var(--navy-900);color:#93A9B5;font-size:14px;padding-top:78px}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;gap:52px;padding-bottom:58px}
.footer h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin-bottom:22px}
.footer-logo{display:flex;align-items:center;gap:13px;margin-bottom:22px}
.footer-logo b{color:#fff;font-size:17px;font-weight:800}
.footer-logo i{font-style:normal;display:block;font-size:10px;letter-spacing:.14em;color:#5F7684;text-transform:uppercase}
.footer p{line-height:1.9}
.footer ul{display:grid;gap:12px}
.footer ul a:hover{color:var(--gold-400)}
.footer-contact li{display:grid;grid-template-columns:20px 1fr;gap:12px;line-height:1.75}
.footer-contact svg{margin-top:4px;opacity:.55}
.footer-contact b{color:#D8E4EA;font-weight:600}
.footer-bot{border-top:1px solid rgba(255,255,255,.09);padding:26px 0;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;font-size:13px}
.footer-bot a:hover{color:var(--gold-400)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal span{color:#5F7684;font-size:12.5px}

/* ---------- floating contact ---------- */
.fab{position:fixed;right:20px;bottom:26px;z-index:80;display:grid;gap:10px}
.fab a,.fab button{
  width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);color:var(--navy-800);
  cursor:pointer;transition:.28s;position:relative;
}
.fab a:hover,.fab button:hover{background:var(--teal-600);color:#fff;border-color:var(--teal-600);transform:translateY(-3px)}
.fab .tip{
  position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(6px);opacity:0;pointer-events:none;
  background:var(--navy-900);color:#fff;font-size:13px;font-weight:600;padding:8px 14px;border-radius:5px;white-space:nowrap;transition:.25s;
}
.fab a:hover .tip,.fab button:hover .tip{opacity:1;transform:translateY(-50%) translateX(0)}

/* ---------- misc ---------- */
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:8px 15px;border-radius:100px;
  background:var(--bg-mist);border:1px solid var(--line);font-size:13px;font-weight:600;color:var(--ink-700);
}
.badge svg{color:var(--teal-600)}
.quote{
  background:var(--gold-50);border:1px solid rgba(200,169,106,.32);border-left:3px solid var(--gold-500);
  border-radius:var(--radius);padding:26px 30px;font-size:15.5px;color:var(--ink-700);line-height:1.9;
}
.quote b{color:var(--navy-800)}
.note{font-size:13px;color:var(--ink-300);line-height:1.8;margin-top:22px}
.prose p{margin-bottom:20px;font-size:15.5px;color:var(--ink-700);line-height:1.95}
.prose h3{font-size:20px;margin:42px 0 16px;padding-left:16px;border-left:3px solid var(--gold-500)}
.prose h4{font-size:16.5px;margin:30px 0 12px;color:var(--navy-800)}
.prose ul{margin:0 0 22px;display:grid;gap:12px}
.prose ul li{position:relative;padding-left:24px;font-size:15px;color:var(--ink-700);line-height:1.9}
.prose ul li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:2px;background:var(--teal-500);transform:rotate(45deg)}
.prose ol{margin:0 0 22px;display:grid;gap:12px;counter-reset:p}
.prose ol li{counter-increment:p;position:relative;padding-left:34px;font-size:15px;color:var(--ink-700);line-height:1.9}
.prose ol li::before{content:counter(p);position:absolute;left:0;top:2px;width:22px;height:22px;border-radius:50%;background:var(--navy-800);color:#fff;font-size:12px;font-weight:700;display:grid;place-items:center;font-family:var(--font-num)}

/* ---------- mobile nav / skip link ---------- */
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--navy-900);color:#fff;padding:12px 20px;border-radius:0 0 6px 0;font-size:14px;font-weight:600}
.skip:focus{left:0;outline:2px solid var(--gold-500)}
.mnav{display:none;border-top:1px solid var(--line);background:#fff;max-height:calc(100vh - 106px);overflow-y:auto}
.mnav.open{display:block}
.mnav ul{padding:10px 22px 4px}
.mnav ul li{border-bottom:1px solid var(--line)}
.mnav ul li a{display:block;padding:16px 4px;font-size:15.5px;font-weight:600;color:var(--navy-800)}
.mnav ul li a:hover,.mnav ul li a.on{color:var(--teal-600)}
.mnav-foot{padding:20px 22px 28px;border-top:1px solid var(--line);background:var(--bg-soft)}
.mnav-foot .btn{width:100%}
@media(max-width:1180px){.mnav{display:none}.mnav.open{display:block}}

/* ---------- lightbox ---------- */
.lb{position:fixed;inset:0;z-index:150;background:rgba(6,23,38,.94);display:none;align-items:center;justify-content:center;padding:40px}
.lb.open{display:flex}
.lb img{max-width:min(1100px,92vw);max-height:86vh;border-radius:var(--radius);box-shadow:var(--shadow-l)}
.lb-close{position:absolute;top:22px;right:26px;width:46px;height:46px;border-radius:50%;border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.08);color:#fff;display:grid;place-items:center;cursor:pointer;transition:.25s}
.lb-close:hover{background:rgba(255,255,255,.18)}

/* ---------- channel strip ---------- */
.channels{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-l);overflow:hidden}
.channel{background:#fff;padding:28px 22px;text-align:center;transition:.3s}
.channel:hover{background:var(--navy-900);color:#fff}
.channel:hover .channel-ico{background:rgba(18,165,160,.2);color:var(--teal-400);border-color:transparent}
.channel:hover h4,.channel:hover p{color:#fff}
.channel:hover p{color:#A9BDC8}
.channel-ico{width:48px;height:48px;border-radius:11px;margin:0 auto 16px;display:grid;place-items:center;background:var(--teal-50);border:1px solid rgba(18,165,160,.2);color:var(--teal-600);transition:.3s}
.channel h4{font-size:15px;margin-bottom:8px;transition:.3s}
.channel p{font-size:13px;color:var(--ink-500);line-height:1.7;transition:.3s}
@media(max-width:860px){.channels{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.channels{grid-template-columns:1fr}}

/* ---------- animation ---------- */
.rv{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.22,.61,.36,1),transform .8s cubic-bezier(.22,.61,.36,1)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ---------- responsive ---------- */
@media(max-width:1500px){
  html[lang="en"] .head-tel{display:none}
}
/* 中文站导航 10 项 + 品牌 + 电话在同一行放不下，1400px 以下收起电话块 */
@media(max-width:1400px){
  .head-tel{display:none}
}
@media(max-width:1360px){
  html[lang="en"] .nav>li>a{font-size:12px;padding:10px 6px}
}
@media(max-width:1320px){
  .head-tel{display:none}
  .nav>li>a{padding:10px 8px;font-size:13px}
  html[lang="en"] .nav>li>a{font-size:12.5px;padding:10px 7px}
  .site-header .wrap{gap:12px}
}
@media(max-width:1180px){
  .wrap{padding:0 22px}
  .nav{display:none}
  .burger{display:inline-flex}
  .head-tel{display:none}
  .split{gap:44px}
  .cta{padding:52px 40px}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .g4{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr;gap:40px}
  .pd-media{position:static}
  .pd-grid{gap:44px}
}
@media(max-width:860px){
  .sec{padding:74px 0}
  .sec-sm{padding:56px 0}
  .hero-inner{padding:88px 0 82px}
  .stats{margin-top:-38px}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .stat{padding:26px 22px}
  .stat:nth-child(3)::before,.stat:nth-child(odd)::before{display:none}
  .stat:nth-child(3),.stat:nth-child(4){border-top:1px solid var(--line)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:36px}
  .split.flip .split-media{order:0}
  .pd-grid{grid-template-columns:1fr}
  .spec-table th{width:130px;padding:14px 14px;font-size:12.5px}
  .spec-table td{padding:14px 14px;font-size:13.5px}
  .toc{padding:20px}
}
@media(max-width:760px){
  .topbar .wrap{height:auto;padding-top:8px;padding-bottom:8px;flex-direction:column;gap:6px;align-items:flex-start}
  .topbar-l{gap:14px;flex-wrap:wrap}
  .topbar span{font-size:12px}
  .topbar-l:last-child{width:100%;justify-content:space-between}
}
@media(max-width:640px){
  .wrap{padding:0 18px}
  .site-header .wrap{height:64px;gap:10px}
  .logo-mark{width:36px;height:36px;border-radius:8px}
  .logo{gap:10px}
  .logo-txt{min-width:0;overflow:hidden}
  .logo-txt b{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:190px}
  .logo-txt i{font-size:8.5px;letter-spacing:.08em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  html[lang="en"] .logo-txt b{font-size:13px;max-width:170px}
  .head-act .btn{display:none}
  .burger{width:40px;height:40px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .stats-inner{grid-template-columns:1fr 1fr}
  .stat{padding:22px 18px}
  .stat b{font-size:26px}
  .rows li{grid-template-columns:1fr;gap:10px}
  .news-item{grid-template-columns:1fr;gap:12px}
  .footer-top{grid-template-columns:1fr;gap:34px}
  .cta{padding:38px 24px;border-radius:var(--radius)}
  .cta-panel{padding:24px 20px}
  .btn{padding:13px 22px;font-size:14px}
  .btn-row{gap:10px}
  .btn-row .btn{flex:1 1 100%;justify-content:center}
  .form-card{padding:26px 20px}
  .faq summary{padding:18px 48px 18px 20px;font-size:15px}
  .faq-a{padding:18px 20px 22px}
  .fab{right:14px;bottom:18px}
  .fab a,.fab button{width:44px;height:44px}
  .prose h3{font-size:18px}
}
@media print{.site-header,.topbar,.fab,.footer{display:none}}

/* ---------- product videos ---------- */
.vd-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.vd-grid-2{grid-template-columns:repeat(2,1fr)}
.vd-grid-1{grid-template-columns:minmax(0,560px)}
.vd-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-l);overflow:hidden;
  cursor:pointer;transition:.35s cubic-bezier(.22,.61,.36,1);display:flex;flex-direction:column;
  text-align:left;position:relative}
.vd-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-l);border-color:rgba(18,165,160,.34)}
.vd-card:focus-visible{outline:3px solid var(--teal-500);outline-offset:3px}
.vd-thumb{position:relative;aspect-ratio:16/9;background:var(--navy-900);overflow:hidden}
.vd-thumb img,.vd-thumb video{width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .7s cubic-bezier(.22,.61,.36,1)}
.vd-card:hover .vd-thumb img,.vd-card:hover .vd-thumb video{transform:scale(1.06)}
.vd-play{position:absolute;inset:0;display:grid;place-items:center;color:#fff;
  background:linear-gradient(180deg,rgba(6,23,38,.10),rgba(6,23,38,.44));transition:.3s}
.vd-play svg{width:58px;height:58px;padding:17px;border-radius:50%;background:rgba(18,165,160,.94);
  box-shadow:0 10px 26px rgba(6,23,38,.42);transition:.3s}
.vd-card:hover .vd-play svg{transform:scale(1.08);background:var(--gold-500)}
.vd-dur{position:absolute;right:12px;bottom:12px;padding:4px 10px;border-radius:99px;
  background:rgba(6,23,38,.82);color:#fff;font-size:12px;font-weight:600;letter-spacing:.02em}
.vd-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.vd-cat{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--teal-600);margin-bottom:10px}
html[lang="zh"] .vd-cat{letter-spacing:.04em;font-size:12.5px}
.vd-body h3{font-size:18px;margin-bottom:10px;line-height:1.45}
.vd-body p{font-size:14px;color:var(--ink-500);line-height:1.75}
.vd-none{text-align:center;padding:64px 24px;border:1px dashed var(--line);
  border-radius:var(--radius-l);background:var(--bg-soft);color:var(--ink-300)}
.vd-none svg{opacity:.7}
.vd-none p{margin:14px 0 6px;font-size:16px;color:var(--ink-700);font-weight:600}
.vd-none span{font-size:13.5px;color:var(--ink-500)}

/* lightbox · video mode */
.lb-video{display:none;max-width:min(1100px,92vw);max-height:82vh;border-radius:var(--radius);
  box-shadow:var(--shadow-l);background:#000}
.lb.is-video .lb-video{display:block}
.lb-cap{position:absolute;left:0;right:0;bottom:24px;text-align:center;color:#DCE7EC;
  font-size:14.5px;padding:0 40px;line-height:1.6}
.lb-cap:empty{display:none}

@media(max-width:1024px){.vd-grid,.vd-grid-2{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){
  .vd-grid,.vd-grid-2,.vd-grid-1{grid-template-columns:1fr;gap:20px}
  .vd-play svg{width:50px;height:50px;padding:15px}
  .lb-cap{bottom:14px;font-size:13px}
}

/* lightbox · video play fallback */
.lb-vd-wrap{position:relative;display:none;line-height:0}
.lb.is-video .lb-vd-wrap{display:block}
.lb-vd-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:82px;height:82px;border:0;border-radius:50%;cursor:pointer;
  display:none;place-items:center;color:#fff;
  background:rgba(18,165,160,.95);box-shadow:0 12px 32px rgba(6,23,38,.5);
  transition:background .25s,transform .25s}
.lb-vd-play.show{display:grid}
.lb-vd-play:hover{background:var(--gold-500);transform:translate(-50%,-50%) scale(1.06)}
.lb.is-video .lb-cap{pointer-events:none}