/* ============================================================
   Zhongtian Shidai Magnesium — DOME METALS layout × Hindustan Magnesium palette
   graphite dark base + orange accent #f47600（taken from hindustanmagnesium.org）
   ============================================================ */
:root{
  /* --- graphite dark base（avoid a dead pure-black base） --- */
  --bg:#15181d;
  --bg-2:#1c2026;
  --surface:#23282f;
  --surface-2:#2b313a;
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.16);

  /* --- text --- */
  --text:#f3f5f7;
  --text-dim:#c2c7cd;
  --text-mute:#8b9098;

  /* --- orange accent（Hindustan Magnesium primary） --- */
  --accent:#f47600;
  --accent-2:#fb8e22;
  --accent-3:#d75b00;
  --accent-soft:rgba(244,118,0,.14);

  --radius:4px;
  --maxw:1200px;
  --font:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;

  /* --- legacy variable aliases：compatible with HTML inline style，no generator changes required --- */
  --gold:var(--accent);
  --gold-2:var(--accent-2);
  --gold-3:var(--accent-3);
  --navy:var(--text);          /* text usage -> light colour */
  --bg-soft:var(--bg-2);
  --bg-soft-2:var(--surface);
  --text-2:var(--text-dim);
  --text-3:var(--text-mute);
  --border-2:var(--border-strong);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- top bar ---------- */
.topbar{background:var(--bg-2);color:var(--text-dim);font-size:13px;border-bottom:1px solid var(--border)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:38px;flex-wrap:wrap;gap:10px}
.topbar .tb-left{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.topbar a{color:var(--accent-2);font-weight:600}
.topbar .slogan{color:var(--text-mute)}

/* ---------- Header ---------- */
.header{background:rgba(21,24,29,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:78px;gap:20px}
.logo{display:flex;align-items:center;gap:12px}
.logo .mark{width:auto;height:46px;background:transparent;display:inline-flex;align-items:center;overflow:visible}
.logo .mark img{height:46px;width:auto;display:block}
.logo .name{font-size:19px;font-weight:700;color:var(--text);line-height:1.15}
.logo .name small{display:block;font-size:10.5px;letter-spacing:1.6px;color:var(--text-mute);font-weight:600}

.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:14.5px;font-weight:600;color:var(--text-dim);padding:6px 0;position:relative;transition:color .2s}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:3px;background:var(--accent);transform:scaleX(0);transition:transform .25s}
.nav a:hover{color:var(--accent-2)}
.nav a:hover::after{transform:scaleX(1)}
.nav a.active{color:var(--accent-2)}
.nav a.active::after{transform:scaleX(1)}
.nav .cta{background:var(--accent);color:#0b0d12;padding:9px 18px;border-radius:var(--radius);font-weight:700}
.nav .cta::after{display:none}
.nav .cta:hover{background:var(--accent-2);color:#0b0d12}

.search{display:flex;border:1px solid var(--border-strong);border-radius:var(--radius);overflow:hidden}
.search input{border:0;outline:0;padding:8px 12px;width:150px;font-size:13px;font-family:var(--font);
  background:var(--surface);color:var(--text)}
.search input::placeholder{color:var(--text-mute)}
.search button{border:0;background:var(--accent);color:#0b0d12;padding:0 14px;font-weight:700;cursor:pointer;font-size:13px}
.menu-btn{display:none;background:var(--surface);color:var(--text);border:1px solid var(--border-strong);
  border-radius:var(--radius);padding:9px 13px;font-size:13px;font-weight:700;cursor:pointer}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:430px;display:flex;align-items:center;
  background:#1c2026 url("../img/hero-factory.jpg") center/cover no-repeat;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(18,21,26,.82) 0%,rgba(18,21,26,.58) 45%,rgba(18,21,26,.28) 100%),
             linear-gradient(180deg,rgba(18,21,26,.32) 0%,rgba(18,21,26,0) 50%,rgba(18,21,26,.45) 100%)}
.hero .wrap{position:relative;padding-top:56px;padding-bottom:56px}
.hero .eyebrow{display:inline-block;font-size:12px;letter-spacing:2.5px;font-weight:700;color:var(--accent-2);
  border-left:3px solid var(--accent);padding-left:10px;margin-bottom:16px}
.hero h1{font-size:clamp(27px,4.2vw,46px);line-height:1.18;font-weight:800;color:var(--text);max-width:17ch;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{margin-top:18px;font-size:clamp(14.5px,1.5vw,17px);color:var(--text-dim);max-width:56ch}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14.5px;padding:13px 26px;
  border-radius:var(--radius);cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s;border:0}
.btn-gold{background:var(--accent);color:#0b0d12}
.btn-gold:hover{background:var(--accent-2);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--text);border:2px solid rgba(255,255,255,.35)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent-2)}
.btn-navy{background:var(--surface);color:var(--text);border:1px solid var(--border-strong)}
.btn-navy:hover{background:var(--surface-2);border-color:var(--accent)}

/* ---------- general section ---------- */
.section{padding:64px 0}
.section.soft{background:var(--bg-2)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 40px}
.sec-head.left{text-align:left;margin-left:0}
.sec-head .eyebrow{font-size:12px;letter-spacing:2.5px;font-weight:700;color:var(--accent);text-transform:uppercase}
.sec-head h2{font-size:clamp(23px,3vw,34px);font-weight:800;color:var(--text);margin-top:10px;line-height:1.25;letter-spacing:-.3px}
.sec-head h2::after{content:"";display:block;width:56px;height:4px;background:var(--accent);margin:14px auto 0;border-radius:2px}
.sec-head.left h2::after{margin-left:0}
.sec-head p{margin-top:14px;color:var(--text-dim);font-size:15.5px}

/* ---------- category tag ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:34px}
.tabs .tab{padding:9px 20px;border:1px solid var(--border-strong);border-radius:999px;font-size:14px;font-weight:600;
  color:var(--text-dim);cursor:pointer;background:var(--surface);transition:all .2s}
.tabs .tab:hover{border-color:var(--accent);color:var(--accent-2)}
.tabs .tab.on{background:var(--accent);border-color:var(--accent);color:#0b0d12}

/* ---------- product grid ---------- */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:box-shadow .25s,border-color .25s,transform .25s}
.pcard:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 12px 28px rgba(0,0,0,.4)}
.pcard .pimg{position:relative;height:190px;overflow:hidden;background:var(--surface-2);flex:none}
.pcard .pimg img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.pcard:hover .pimg img{transform:scale(1.07)}
.pcard .pimg .tag{position:absolute;left:10px;top:10px;background:var(--accent);
  padding:6px 7px;border-radius:3px;line-height:0;display:inline-flex;align-items:center;
  box-shadow:0 2px 10px rgba(0,0,0,.35)}
.pcard .pimg .tag img{height:18px;width:auto;display:block}
.pcard .pbody{padding:15px 16px 17px;flex:1;display:flex;flex-direction:column}
.pcard .pname{font-size:14.5px;font-weight:700;color:var(--text);line-height:1.45}
.pcard .pdesc{font-size:12.5px;color:var(--text-dim);margin-top:7px;flex:1}
.pcard .pmore{margin-top:11px;font-size:12.5px;font-weight:700;color:var(--accent-2);display:inline-flex;gap:5px;align-items:center}

/* ---------- category heading row ---------- */
.catrow{display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  border-bottom:2px solid var(--border);padding-bottom:12px;margin:46px 0 24px}
.catrow h3{font-size:19px;font-weight:800;color:var(--text);display:flex;align-items:center;gap:10px}
.catrow h3 i{width:auto;height:22px;background:transparent;display:inline-flex;align-items:center;
  border-radius:3px;overflow:hidden;font-style:normal;flex:none}
.catrow h3 i img{height:20px;width:auto;display:block}
.catrow .en{font-size:12px;letter-spacing:1.4px;color:var(--text-mute);font-weight:600}

/* ---------- key figures ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px}
.stat{text-align:center}
.stat .n{font-size:clamp(26px,3.2vw,38px);font-weight:800;color:var(--accent-2);line-height:1.1}
.stat .n small{font-size:.5em;font-weight:700}
.stat .l{margin-top:6px;font-size:13.5px;color:var(--text-dim)}

/* ---------- strengths / capabilities ---------- */
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:border-color .25s,box-shadow .25s}
.feat:hover{border-color:var(--accent);box-shadow:0 10px 24px rgba(0,0,0,.35)}
.feat .ic{width:56px;height:56px;border-radius:var(--radius);background:var(--accent-soft);
  display:grid;place-items:center;margin-bottom:15px;overflow:visible;padding:10px;
  border:1px solid var(--border-strong)}
.feat .ic img{width:100%;height:100%;object-fit:contain;display:block}
.feat h3{font-size:17px;font-weight:700;color:var(--text);margin-bottom:8px}
.feat p{font-size:14px;color:var(--text-dim)}

/* ---------- milestone timeline ---------- */
.timeline{position:relative;padding-left:28px;margin-top:10px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--border)}
.tl-item{position:relative;padding-bottom:26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-27px;top:6px;width:12px;height:12px;border-radius:50%;
  background:var(--bg);border:3px solid var(--accent)}
.tl-item .yr{font-size:15px;font-weight:800;color:var(--accent-2)}
.tl-item h4{font-size:15.5px;font-weight:700;color:var(--text);margin-top:2px}
.tl-item p{font-size:13.5px;color:var(--text-dim);margin-top:4px}

/* ---------- about two-column ---------- */
.about2{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.about2 .ph{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);min-height:320px;
  background-size:cover;background-position:center}
.about2 h3{font-size:22px;font-weight:800;color:var(--text);margin-bottom:14px}
.about2 p{color:var(--text-dim);font-size:15px;margin-bottom:14px}

/* ---------- certificates / qualifications ---------- */
.certs{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cert{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;text-align:center;transition:border-color .25s}
.cert:hover{border-color:var(--accent)}
.cert img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:3px;background:var(--surface-2)}
.cert .nm{margin-top:10px;font-size:13px;color:var(--text-dim);font-weight:600}

/* ---------- magnesium application gallery ---------- */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.gal .g{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px;
  transition:border-color .25s,transform .25s,box-shadow .25s}
.gal .g:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 10px 24px rgba(0,0,0,.35)}
.gal .g img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:3px;background:var(--surface-2);display:block}
.gal .g .nm{margin-top:10px;font-size:13px;color:var(--text-dim);font-weight:600}

/* ---------- News & Insights — full-bleed hero stage (arrows + counter overlay the picture) ---------- */
.imeta{display:flex;align-items:center;gap:10px;font-size:12px;font-weight:600}
.idate{color:var(--accent-2)}
.icat{color:rgba(255,255,255,.74);letter-spacing:1.4px;text-transform:uppercase}
.icontrols{display:flex;gap:10px;flex:none}

/* the carousel itself is the "big screen"; controls sit on top of it, not beside it */
.news-stage{position:relative}
.carousel{position:relative}
.car-track{display:flex;gap:20px;overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;padding-bottom:0;cursor:grab;
  scrollbar-width:none;-ms-overflow-style:none;-webkit-overflow-scrolling:touch}
.car-track::-webkit-scrollbar{display:none}
.car-track.dragging{cursor:grabbing;scroll-snap-type:none;scroll-behavior:auto;user-select:none}

/* one article per view: full image, headline + controls overlaid on the picture */
.icard{position:relative;flex:0 0 100%;scroll-snap-align:start;display:block;
  height:480px;border-radius:var(--radius);overflow:hidden;text-decoration:none;
  background:var(--surface-2)}
.icard .ibg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transition:transform .6s}
.icard:hover .ibg{transform:scale(1.04)}
.icard-mask{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(12,16,22,.50) 0%,rgba(12,16,22,.10) 32%,rgba(12,16,22,.26) 58%,rgba(12,16,22,.94) 100%)}
.icard-body{position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:46px 50px;display:flex;flex-direction:column}
.icard .eyebrow{font-size:11px;letter-spacing:2.6px;font-weight:700;color:var(--accent);
  text-transform:uppercase;margin-bottom:12px}
.icard h4{font-size:32px;font-weight:800;color:#fff;line-height:1.28;
  letter-spacing:-.3px;max-width:820px;text-shadow:0 2px 16px rgba(0,0,0,.5)}
.icard p{font-size:15px;color:rgba(255,255,255,.88);margin-top:14px;max-width:700px;
  line-height:1.7;text-shadow:0 1px 10px rgba(0,0,0,.45)}
.icard-body .imeta{margin-top:14px}
.icard .imore{margin-top:22px;font-size:12.5px;font-weight:700;color:var(--accent-2);
  display:inline-flex;gap:6px;align-items:center;align-self:flex-start}
.icard .imore::after{content:"\203a";font-size:16px;line-height:1}

/* arrows + counter overlaid on the stage (on the image, not outside the block) */
.news-stage .icbtn{position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:46px;height:46px;border-radius:50%;
  background:rgba(12,16,22,.42);border:1px solid rgba(255,255,255,.22);color:#fff;
  backdrop-filter:blur(4px);box-shadow:0 4px 16px rgba(0,0,0,.35)}
.news-stage .icbtn:hover{background:var(--accent);color:#0b0d12;border-color:var(--accent)}
.news-stage .icbtn.prev{left:18px}
.news-stage .icbtn.next{right:18px}
.news-stage .icount{position:absolute;right:22px;bottom:20px;z-index:5;
  font-size:12.5px;font-weight:700;letter-spacing:1.6px;color:rgba(255,255,255,.9);
  font-variant-numeric:tabular-nums;text-shadow:0 1px 6px rgba(0,0,0,.55)}


/* ---------- Category disc nav ---------- */
.cat-track{display:flex;gap:26px;overflow-x:auto;overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory;padding:8px 0 14px;cursor:grab;
  scrollbar-width:none;-ms-overflow-style:none;-webkit-overflow-scrolling:touch}
.cat-track::-webkit-scrollbar{display:none}
.cat-track.dragging{cursor:grabbing;scroll-snap-type:none;scroll-behavior:auto;user-select:none}
.catitem{flex:0 0 auto;width:132px;scroll-snap-align:start;text-decoration:none;
  display:flex;flex-direction:column;align-items:center;gap:13px}
.catitem .cdisc{width:114px;height:114px;border-radius:50%;overflow:hidden;display:block;
  background:#1b2637;border:2px solid var(--border-strong);flex:none;
  transition:border-color .25s,box-shadow .25s,transform .25s}
.catitem:hover .cdisc{border-color:var(--accent);box-shadow:0 10px 24px rgba(0,0,0,.5);transform:translateY(-4px)}
.catitem .cdisc img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s}
.catitem:hover .cdisc img{transform:scale(1.09)}
.catitem .cname{font-size:13.5px;font-weight:600;color:var(--text-dim);line-height:1.4;
  text-align:center;transition:color .25s}
.catitem:hover .cname{color:var(--accent-2)}

/* ---------- news ---------- */
.ngrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ncard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .25s,border-color .25s,box-shadow .25s}
.ncard:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 12px 28px rgba(0,0,0,.4)}
.ncard .nimg{height:180px;overflow:hidden;background:var(--surface-2);flex:none}
.ncard .nimg img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.ncard:hover .nimg img{transform:scale(1.07)}
.ncard .nbody{padding:16px 17px 18px;flex:1;display:flex;flex-direction:column}
.ncard .nmeta{display:flex;align-items:center;gap:10px;margin-bottom:9px;flex-wrap:wrap}
.ncard .ndate{font-size:12.5px;font-weight:800;color:var(--accent-2)}
.ncard .ncat{font-size:11px;color:var(--text-mute);border:1px solid var(--border-strong);border-radius:999px;padding:2px 9px}
.ncard h4{font-size:15.5px;font-weight:700;color:var(--text);line-height:1.45}
.ncard p{font-size:13.5px;color:var(--text-dim);margin-top:8px;flex:1}

/* ---------- contact ---------- */
.cgrid{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:start}
.cbox{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.cbox h3{font-size:20px;font-weight:800;color:var(--text);margin-bottom:6px}
.cbox .sub{color:var(--text-mute);font-size:13px;margin-bottom:20px}
.field{margin-bottom:15px}
.field label{display:block;font-size:13px;color:var(--text-dim);margin-bottom:6px;font-weight:600}
.field input,.field textarea{width:100%;background:var(--bg);border:1px solid var(--border-strong);border-radius:var(--radius);
  padding:11px 13px;color:var(--text);font-family:var(--font);font-size:14px;outline:0;transition:border-color .2s}
.field input::placeholder,.field textarea::placeholder{color:var(--text-mute)}
.field input:focus,.field textarea:focus{border-color:var(--accent)}
.field textarea{resize:vertical;min-height:104px}
.inforow{display:flex;gap:14px;padding:15px 0;border-bottom:1px solid var(--border)}
.inforow:last-child{border-bottom:0}
.inforow .ic{width:46px;height:46px;flex:none;border-radius:var(--radius);background:var(--accent-soft);
  display:grid;place-items:center;padding:8px;border:1px solid var(--border-strong)}
.inforow .ic img{width:100%;height:100%;object-fit:contain;display:block}
/* photo-type icon（expert avatars etc.）：no padding、no orange background */
.ic-photo{width:96px;height:96px;padding:0;background:var(--surface-2);border:1px solid var(--border);
  overflow:hidden;border-radius:var(--radius)}
.ic-photo img{object-fit:cover;border-radius:0}
.inforow .t b{display:block;font-size:14.5px;color:var(--text)}
.inforow .t span{font-size:13px;color:var(--text-dim)}

/* ---------- CTA with ---------- */
.ctaband{background:linear-gradient(135deg,var(--surface),var(--surface-2));border:1px solid var(--border);
  border-radius:var(--radius);padding:44px 40px;text-align:center;position:relative;overflow:hidden}
.ctaband::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 240px at 50% 0,rgba(244,118,0,.16),transparent 62%)}
.ctaband h2{font-size:clamp(21px,2.8vw,30px);font-weight:800;color:var(--text);position:relative}
.ctaband p{color:var(--text-dim);margin-top:10px;position:relative}
.ctaband .hero-actions{justify-content:center;position:relative}

/* ---------- breadcrumb ---------- */
.crumb{background:var(--bg-2);border-bottom:1px solid var(--border);padding:13px 0;font-size:13px;color:var(--text-mute)}
.crumb a{color:var(--text-dim)}
.crumb a:hover{color:var(--accent-2)}
.crumb span{margin:0 7px}

/* ---------- footer ---------- */
.footer{background:var(--bg-2);color:var(--text-dim);padding:52px 0 0;border-top:1px solid var(--border)}
.footer .fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:34px}
.footer h4{font-size:14.5px;color:var(--text);margin-bottom:16px;font-weight:700;
  padding-bottom:9px;border-bottom:2px solid var(--accent);display:inline-block}
.footer .fbrand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.footer .fbrand .mark{width:auto;height:42px;background:transparent;display:inline-flex;align-items:center;overflow:visible}
.footer .fbrand .mark img{height:42px;width:auto;display:block}
.footer .fbrand strong{color:var(--text);font-size:16px}
.footer p{font-size:13.5px;line-height:1.75}
.footer ul{list-style:none}
.footer ul li{padding:5px 0;font-size:13.5px}
.footer ul li a:hover{color:var(--accent-2)}
.footer .fcontact li{display:flex;gap:8px}
.footer .fbottom{border-top:1px solid var(--border);padding:18px 0;display:flex;
  justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.5px;color:var(--text-mute)}

/* reveal */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .nav{display:none}
  .menu-btn{display:block}
  .nav.open{display:flex;position:absolute;top:78px;left:0;right:0;flex-direction:column;gap:0;
    background:var(--bg-2);border-bottom:1px solid var(--border);padding:10px 20px 16px;box-shadow:0 10px 22px rgba(0,0,0,.4)}
  .nav.open a{padding:11px 0;border-bottom:1px solid var(--border)}
  .nav.open a::after{display:none}
  .nav.open .cta{text-align:center;margin-top:10px}
  .search{display:none}
  .pgrid{grid-template-columns:repeat(3,1fr)}
  .fgrid,.certs,.ngrid,.gal{grid-template-columns:repeat(2,1fr)}
  .about2{grid-template-columns:1fr;gap:26px}
  .icard{height:400px}
  .icard-body{padding:34px 34px}
  .icard h4{font-size:25px}
  .icard p{font-size:14px}
  .icard .imore{margin-top:18px}
  .news-stage .icbtn{width:42px;height:42px}
  .cat-track{gap:20px}
  .catitem{width:118px}
  .catitem .cdisc{width:102px;height:102px}
  .cgrid{grid-template-columns:1fr}
  .footer .fgrid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:repeat(2,1fr);gap:24px}
}
@media(max-width:680px){
  .pgrid{grid-template-columns:repeat(2,1fr);gap:14px}
  .fgrid,.certs,.ngrid,.gal{grid-template-columns:1fr}
  .footer .fgrid{grid-template-columns:1fr}
  .car-track{gap:14px;padding-bottom:0}
  .icontrols{display:none}
  .icard{height:340px}
  .icard-body{padding:22px 22px 54px}
  .icard .eyebrow{margin-bottom:9px}
  .icard h4{font-size:20px;line-height:1.3}
  .icard p{font-size:13.5px;margin-top:10px}
  .icard .imore{margin-top:14px}
  .news-stage .icbtn{width:38px;height:38px}
  .news-stage .icbtn.prev{left:10px}
  .news-stage .icbtn.next{right:10px}
  .cat-track{gap:16px;padding:6px 0 10px}
  .catitem{width:96px}
  .catitem .cdisc{width:84px;height:84px}
  .catitem .cname{font-size:12.5px}
  .section{padding:44px 0}
  .hero{min-height:340px}
  .ctaband{padding:32px 20px}
  .pcard .pimg{height:150px}
  .topbar .slogan{display:none}
}

@media(max-width:430px){
  .icard{height:300px}
  .icard-body{padding:18px 18px 50px}
  .icard h4{font-size:17px}
  .icard p{font-size:13px;margin-top:8px}
  .news-stage .icount{display:none}
  .news-stage .icbtn{width:34px;height:34px}
  .news-stage .icbtn.prev{left:8px}
  .news-stage .icbtn.next{right:8px}
}

/* ===== Homepage vertical products (PDF list) =====
   Each product is its OWN standalone rounded box. The 7 boxes are direct
   siblings (no enclosing container). Inside: a large image on the left and
   text on the right, each ~50% width. Always side-by-side (no stacking at
   any width). */
.hprow{display:flex;flex-direction:row;align-items:stretch;gap:32px;
  background:var(--surface);border:1px solid var(--border);border-radius:14px;
  padding:26px;margin:0 0 46px;transition:border-color .2s ease,transform .2s ease}
.hprow:last-child{margin-bottom:0}
.sec-head + .hprow{margin-top:34px}
.hprow:hover{border-color:var(--accent)}
.hpimg{flex:0 0 40%;min-width:0;border-radius:10px;overflow:hidden;
  aspect-ratio:16/10;background:#ffffff}
.hpimg img{width:100%;height:100%;object-fit:contain;display:block}
.hptext{flex:1 1 0;min-width:0;padding-left:8px;align-self:center}
.hptext h3{font-size:22px;font-weight:700;margin:0 0 12px;color:var(--text);letter-spacing:-0.01em}
.hptext p{font-size:15.5px;line-height:1.78;color:var(--text-dim);margin:0}

/* ===== Product detail page (用途 / 应用领域 / 优势) ===== */
.purpose-box{background:var(--bg-soft);border:1px solid var(--border);border-left:3px solid var(--accent);
  border-radius:var(--radius);padding:22px 24px;font-size:15.5px;line-height:1.85;color:var(--text-dim)}
.plist{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:6px 0 0;padding:0;list-style:none}
.plist li{display:flex;gap:12px;align-items:flex-start;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;
  font-size:14.5px;line-height:1.6;color:var(--text-dim)}
.plist li:hover{border-color:var(--accent)}
.plist .ck{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:var(--accent);
  color:#fff;display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;margin-top:1px;line-height:1}
@media (max-width:680px){.plist{grid-template-columns:1fr}}

/* ===== Product detail - back to products arrow ===== */
.back-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--text-dim);text-decoration:none;padding:9px 15px;border:1px solid var(--border);
  border-radius:var(--radius);background:var(--surface);margin-bottom:26px;
  transition:color .2s ease,border-color .2s ease,transform .2s ease}
.back-arrow:hover{color:var(--accent);border-color:var(--accent);transform:translateX(-3px)}
.back-arrow .ba-ico{font-size:16px;line-height:1}

/* ===== Footer social icons ===== */
.fsocial{display:flex;gap:14px;margin:26px 0 4px}
.fsocial a{width:40px;height:40px;border-radius:50%;display:inline-flex;align-items:center;
  justify-content:center;background:rgba(255,255,255,.06);border:1px solid var(--border);
  color:var(--text);transition:background .2s ease,color .2s ease,border-color .2s ease}
.fsocial a:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.fsocial svg{width:20px;height:20px;display:block}
@media (max-width:680px){.fsocial{margin:22px 0 4px}}

/* ===== News card as external link ===== */
a.ncard{display:block;text-decoration:none;color:inherit}
a.ncard .nbody h4{transition:color .2s ease}
a.ncard:hover .nbody h4{color:var(--accent)}