/* ============================================================
   SHANGXIN REFRIGERATION — factory site
   Palette sampled from the brand mark: deep navy + charcoal
   ============================================================ */

:root{
  --navy:#0b4a8f;
  --navy-d:#07305e;
  --navy-l:#2b74b8;
  --ice:#1f9fc4;
  --ice-l:#e6f4f9;
  --ink:#151c24;
  --ink2:#41505c;
  --muted:#7a8a97;
  --line:#e1e8ef;
  --line2:#eef3f7;
  --paper:#f5f8fb;
  --paper2:#edf2f7;
  --white:#fff;
  --amber:#d98524;
  --ok:#17805a;
  --r:4px;
  --sh:0 1px 2px rgba(21,28,36,.05),0 6px 20px rgba(21,28,36,.05);
  --sh-lg:0 2px 6px rgba(21,28,36,.06),0 18px 44px rgba(21,28,36,.09);
  --mono:"SF Mono",Menlo,Consolas,"Courier New",monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","Segoe UI",Roboto,-apple-system,"Helvetica Neue",Arial,"Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--white);line-height:1.62;font-size:15px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--navy-l)}
.wrap{max-width:1180px;margin:0 auto;padding:0 26px}
.muted{color:var(--muted)}
.center{text-align:center}
.nowrap{white-space:nowrap}

/* ---------- top strip ---------- */
.strip{background:var(--ink);color:#a9b7c3;font-size:12px;letter-spacing:.2px}
.strip .wrap{display:flex;justify-content:space-between;align-items:center;height:34px;gap:16px;flex-wrap:wrap}
.strip b{color:#fff;font-weight:600}
.strip .dot{opacity:.4;margin:0 8px}
.strip a{color:#a9b7c3}
.strip a:hover{color:#fff}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(8px)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:76px;gap:22px}
.brand{display:flex;align-items:center;flex:0 0 auto}
.brand img{height:40px;width:auto}
.brand:hover{opacity:.86}
nav.main{display:flex;align-items:center;gap:4px}
nav.main a{padding:9px 13px;font-size:13.5px;font-weight:500;color:var(--ink2);border-radius:var(--r);white-space:nowrap;position:relative}
nav.main a:hover{background:var(--paper);color:var(--navy)}
nav.main a.on{color:var(--navy);font-weight:650}
nav.main a.on::after{content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;background:var(--navy);border-radius:2px}
.hdr-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;
  border-radius:var(--r);font-size:13.5px;font-weight:650;border:1px solid transparent;cursor:pointer;
  transition:.16s;white-space:nowrap;font-family:inherit;letter-spacing:.1px}
.btn-p{background:var(--navy);color:#fff}
.btn-p:hover{background:var(--navy-d);color:#fff}
.btn-o{background:#fff;color:var(--navy);border-color:#c9d8e6}
.btn-o:hover{border-color:var(--navy-l);color:var(--navy-l);background:#fbfdff}
.btn-wa{background:#1c9e5f;color:#fff}
.btn-wa:hover{background:#17844f;color:#fff}
.btn-gh{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.32)}
.btn-gh:hover{background:rgba(255,255,255,.18);color:#fff}
.btn-sm{padding:8px 14px;font-size:12.5px}
.btn-lg{padding:13px 26px;font-size:14.5px}
.btn svg{flex:0 0 auto}

.burger{display:none;background:none;border:0;cursor:pointer;padding:9px}
.burger i{display:block;width:22px;height:2px;background:var(--ink);margin:4.5px 0;border-radius:2px;transition:.2s}
.mnav{display:none;background:#fff;border-bottom:1px solid var(--line);padding:6px 0 14px}
.mnav a{display:block;padding:12px 26px;font-size:14.5px;color:var(--ink2);border-bottom:1px solid var(--line2)}
.mnav.open{display:block}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:
   linear-gradient(180deg,#fbfdff 0%,#f2f7fb 100%);
   border-bottom:1px solid var(--line)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(11,74,143,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(11,74,143,.055) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at 70% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 70% 40%,#000 20%,transparent 78%);
}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center;padding-top:66px;padding-bottom:64px}
.eyebrow{font-size:11px;letter-spacing:2.4px;text-transform:uppercase;color:var(--navy-l);font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--navy-l);border-radius:2px;flex:0 0 22px}
h1{font-size:44px;line-height:1.13;font-weight:750;letter-spacing:-1.1px;color:var(--ink);margin-bottom:20px}
h1 em{font-style:normal;color:var(--navy);background:linear-gradient(180deg,transparent 66%,rgba(31,159,196,.22) 66%,rgba(31,159,196,.22) 94%,transparent 94%);padding:0 2px}
.lead{font-size:16.5px;color:var(--ink2);max-width:560px;margin-bottom:28px;line-height:1.7}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
.hero-facts{display:grid;grid-template-columns:repeat(4,auto);gap:0;border-top:1px solid var(--line);padding-top:22px;max-width:600px}
.hero-facts>div{padding-right:26px;margin-right:26px;border-right:1px solid var(--line)}
.hero-facts>div:last-child{border:0;margin:0;padding-right:0}
.hero-facts b{display:block;font-size:21px;font-weight:750;color:var(--ink);line-height:1.2;letter-spacing:-.4px}
.hero-facts span{font-size:11.5px;color:var(--muted);letter-spacing:.3px}

.hero-art{position:relative}
.hero-art .frame{background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:var(--sh-lg);overflow:hidden}
.hero-art .frame-top{display:flex;align-items:center;gap:6px;padding:9px 13px;border-bottom:1px solid var(--line2);background:var(--paper)}
.hero-art .frame-top i{width:7px;height:7px;border-radius:50%;background:#d6dfe8;display:block}
.hero-art .frame-top span{margin-left:auto;font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.4px}
.hero-art .frame-body{padding:18px 18px 6px;background:linear-gradient(180deg,#fff,#fafcfe);display:flex;justify-content:center}
.hero-art .frame-body svg{height:330px;width:auto;max-width:100%}
.hero-art .frame-body img{width:100%;height:380px;object-fit:cover;object-position:center 42%;display:block}
.hero-art .cap{font-size:11.5px;color:var(--muted);padding:0 16px 14px;letter-spacing:.2px}

/* ---------- sections ---------- */
.sec{padding:78px 0}
.sec--paper{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec--ink{background:var(--ink);color:#cdd8e2}
.sec--ink h2,.sec--ink h3{color:#fff}
.sec-head{max-width:660px;margin-bottom:44px}
.sec-head.c{max-width:680px;margin-left:auto;margin-right:auto;text-align:center}
.sec-head.c .eyebrow{justify-content:center}
h2{font-size:31px;line-height:1.22;font-weight:740;letter-spacing:-.7px;margin-bottom:14px;color:var(--ink)}
.sec-head p{font-size:15.5px;color:var(--ink2);line-height:1.7}
h3{font-size:19px;font-weight:700;letter-spacing:-.25px;margin-bottom:9px}
h4{font-size:14px;font-weight:700;letter-spacing:.1px}

/* ---------- product cards ---------- */
.grid4{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.pcard:hover{box-shadow:var(--sh-lg);border-color:#cfdce8;transform:translateY(-2px)}
.pcard-art{background:linear-gradient(170deg,#f7fafd,#eaf1f7);padding:26px 22px;border-bottom:1px solid var(--line2);position:relative;height:250px;display:flex;align-items:center;justify-content:center}
.pcard-art svg{height:100%;width:auto;max-width:100%;display:block}
.pcard-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.pcard-art .pcard-tag{z-index:1;background:rgba(255,255,255,.88);padding:4px 10px;border-radius:4px}
.pcard-tag{position:absolute;top:14px;left:16px;font-family:var(--mono);font-size:10px;letter-spacing:.6px;color:#9aabb8;text-transform:uppercase}
.pcard-bd{padding:20px 22px 22px;flex:1;display:flex;flex-direction:column}
.pcard-bd h3{font-size:18.5px;margin-bottom:6px}
.pcard-bd .cn{font-size:12px;color:var(--muted);letter-spacing:.8px;margin-bottom:11px;display:block}
.pcard-bd p{font-size:13.5px;color:var(--ink2);line-height:1.62;margin-bottom:14px}
.pcard-meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.chip{font-size:11.5px;color:var(--ink2);background:var(--paper);border:1px solid var(--line);padding:3px 9px;border-radius:20px;letter-spacing:.1px}
.pcard-bd .more{margin-top:auto;font-size:13px;font-weight:650;color:var(--navy);display:inline-flex;align-items:center;gap:6px}
.pcard:hover .more{gap:10px}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.tight{gap:40px}
.checks{list-style:none;display:grid;gap:15px;margin-top:8px}
.checks li{display:grid;grid-template-columns:22px 1fr;gap:12px;font-size:14.5px;color:var(--ink2);line-height:1.6}
.checks li b{color:var(--ink);font-weight:650}
.checks .ic{width:22px;height:22px;border-radius:50%;background:var(--ice-l);display:flex;align-items:center;justify-content:center;margin-top:2px}
.checks .ic svg{width:12px;height:12px}

/* ---------- process steps ---------- */
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:0;border-top:2px solid var(--line);margin-top:14px}
.steps>div{padding:22px 18px 0 0;position:relative}
.steps>div::before{content:"";position:absolute;top:-6px;left:0;width:10px;height:10px;border-radius:50%;background:#fff;border:2px solid var(--navy)}
.steps .n{font-family:var(--mono);font-size:11px;color:var(--navy-l);letter-spacing:.8px;margin-bottom:8px}
.steps h4{margin-bottom:6px}
.steps p{font-size:12.5px;color:var(--muted);line-height:1.6}

/* ---------- stat band ---------- */
.band{background:var(--navy-d);color:#cfe0ef;position:relative;overflow:hidden}
.band::after{content:"";position:absolute;right:-120px;top:-140px;width:460px;height:460px;background:radial-gradient(circle,rgba(255,255,255,.09),transparent 68%)}
.band .wrap{position:relative;z-index:2;padding:56px 26px;display:grid;grid-template-columns:1.4fr auto;gap:40px;align-items:center}
.band h2{color:#fff;font-size:27px;margin-bottom:10px}
.band p{color:#b9d1e6;font-size:14.5px;max-width:640px}

/* ---------- spec table ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
table.spec th,table.spec td{padding:12px 15px;text-align:left;border-bottom:1px solid var(--line2);vertical-align:top}
table.spec thead th{background:var(--paper);font-size:11.5px;letter-spacing:.7px;text-transform:uppercase;color:var(--ink2);font-weight:700;border-bottom:1px solid var(--line);white-space:nowrap}
table.spec tbody tr:last-child td{border-bottom:0}
table.spec tbody tr:hover{background:#fafcfe}
table.spec td:first-child{font-weight:650;color:var(--ink);white-space:nowrap}
table.spec .k{color:var(--muted);font-size:12.5px;font-weight:500}
.tbl-note{font-size:12px;color:var(--muted);margin-top:11px;line-height:1.6;display:flex;gap:8px}
.tbl-note b{color:var(--ink2)}

/* ---------- callout ---------- */
.callout{border:1px solid #cfe2ee;background:#f4fafd;border-left:3px solid var(--ice);border-radius:0 5px 5px 0;padding:16px 20px;font-size:13.5px;color:var(--ink2);line-height:1.65}
.callout b{color:var(--ink)}
.callout.warn{border-color:#f0dcc0;background:#fdf8f1;border-left-color:var(--amber)}
.callout h4{margin-bottom:5px}

/* ---------- feature grid ---------- */
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:6px;overflow:hidden}
.fgrid>div{background:#fff;padding:24px 22px}
.fgrid h4{margin-bottom:7px;font-size:14.5px}
.fgrid p{font-size:13px;color:var(--ink2);line-height:1.62}
.fgrid .ic{width:32px;height:32px;border-radius:5px;background:var(--ice-l);display:flex;align-items:center;justify-content:center;margin-bottom:13px}
.fgrid .ic svg{width:16px;height:16px;stroke:var(--navy)}
.sec--ink .fgrid .ic svg{stroke:#5fd0ea}

/* ---------- anchor nav ---------- */
.anchors{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:76px;z-index:40}
.anchors .wrap{display:flex;gap:4px;overflow-x:auto;padding-top:9px;padding-bottom:9px}
.anchors a{font-size:13px;font-weight:550;color:var(--ink2);padding:7px 13px;border-radius:20px;white-space:nowrap;border:1px solid transparent}
.anchors a:hover{background:var(--paper);color:var(--navy)}
.anchors a.on{background:var(--ice-l);color:var(--navy);border-color:#cbe6f0;font-weight:650}

/* ---------- page head ---------- */
.phead{background:linear-gradient(180deg,#fbfdff,#f1f7fb);border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.phead::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(11,74,143,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(11,74,143,.05) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(ellipse at 20% 30%,#000,transparent 75%);-webkit-mask-image:radial-gradient(ellipse at 20% 30%,#000,transparent 75%)}
.phead .wrap{position:relative;z-index:2;padding-top:46px;padding-bottom:44px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.crumb{font-size:12px;color:var(--muted);margin-bottom:14px;letter-spacing:.2px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--navy)}
.crumb span{margin:0 7px;opacity:.55}
.phead h1{font-size:38px;margin-bottom:14px}
.phead .lead{font-size:16px;margin-bottom:0;max-width:560px}
.phead .art{background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px;box-shadow:var(--sh)}
.phead .art svg{height:250px;width:auto;max-width:100%;display:block;margin:0 auto}
.phead .art img{width:100%;height:270px;object-fit:cover;object-position:center 40%;border-radius:6px;display:block}
.phead .wrap--solo{grid-template-columns:1fr;max-width:680px;margin:0 auto;text-align:center;padding-top:64px;padding-bottom:60px}
.phead .wrap--solo .lead{max-width:none}

/* ---------- two col detail ---------- */
.detail{display:grid;grid-template-columns:1.2fr .8fr;gap:46px;align-items:start}
.sidecard{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:24px}
.sidecard h4{margin-bottom:14px;padding-bottom:11px;border-bottom:1px solid var(--line)}
.sidecard dl{display:grid;gap:11px;font-size:13px}
.sidecard dt{color:var(--muted);font-size:11.5px;letter-spacing:.4px;text-transform:uppercase;margin-bottom:2px}
.sidecard dd{color:var(--ink);font-weight:550}
.sidecard .btn{margin-top:18px}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{cursor:pointer;font-size:14.5px;font-weight:600;color:var(--ink);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:"+";font-size:19px;color:var(--navy-l);font-weight:400;line-height:1;flex:0 0 auto}
.faq details[open] summary::after{content:"–"}
.faq p{font-size:13.5px;color:var(--ink2);line-height:1.72;padding-top:11px;max-width:820px}

/* ---------- form ---------- */
.form{display:grid;gap:14px}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form label{display:block;font-size:12px;font-weight:650;color:var(--ink2);margin-bottom:6px;letter-spacing:.2px}
.form input,.form select,.form textarea{
  width:100%;padding:11px 13px;border:1px solid #cfdae4;border-radius:4px;font-size:13.5px;
  font-family:inherit;color:var(--ink);background:#fff;transition:.15s;
}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--navy-l);box-shadow:0 0 0 3px rgba(43,116,184,.1)}
.form textarea{resize:vertical;min-height:96px}
.form .hint{font-size:11.5px;color:var(--muted);line-height:1.5}

/* ---------- contact cards ---------- */
.ccard{border:1px solid var(--line);border-radius:6px;padding:22px;background:#fff}
.ccard h4{margin-bottom:8px;font-size:13px;letter-spacing:.3px;text-transform:uppercase;color:var(--muted);font-weight:700}
.ccard b{display:block;font-size:16px;color:var(--ink);letter-spacing:-.1px;margin-bottom:4px;font-weight:650}
.ccard span{font-size:12.5px;color:var(--muted)}
.ccard a{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:13px;font-weight:650}

/* ---------- footer ---------- */
footer{background:#0e151d;color:#94a4b2;font-size:13px;padding:56px 0 0}
footer .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
footer .brand{display:block}
footer .brand img{display:block;height:34px;width:auto;filter:brightness(0) invert(1);opacity:.92;margin-bottom:16px}
footer .brand p{margin-bottom:10px}
footer h5{color:#fff;font-size:12px;letter-spacing:1.3px;text-transform:uppercase;margin-bottom:14px;font-weight:700}
footer ul{list-style:none;display:grid;gap:9px}
footer a{color:#94a4b2}
footer a:hover{color:#fff}
footer p{line-height:1.7;max-width:300px}
footer .bot{border-top:1px solid #1d2833;padding:18px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:#6b7c8b}
footer .bot span{display:flex;gap:16px;flex-wrap:wrap}

/* ---------- misc ---------- */
.divider{height:1px;background:var(--line);margin:0}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:1px;color:var(--muted);text-transform:uppercase}
.tagline{font-size:13px;color:var(--muted);margin-top:10px}
a.skip{position:absolute;left:-9999px}
a.skip:focus{left:12px;top:12px;background:#fff;padding:8px 14px;z-index:99}

@media (max-width:1040px){
  nav.main{display:none}
  .burger{display:block}
  .hdr-cta .btn-o{display:none}
  .hero .wrap,.phead .wrap{grid-template-columns:1fr;gap:36px;padding-top:48px;padding-bottom:44px}
  .split,.detail{grid-template-columns:1fr;gap:32px}
  .grid4{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(3,1fr);row-gap:26px}
  .fgrid{grid-template-columns:1fr 1fr}
  footer .cols{grid-template-columns:1fr 1fr;gap:32px}
  .band .wrap{grid-template-columns:1fr;gap:24px}
  h1{font-size:35px}
}
@media (max-width:640px){
  .wrap{padding:0 18px}
  h1{font-size:29px;letter-spacing:-.6px}
  h2{font-size:24px}
  .phead h1{font-size:27px}
  .sec{padding:52px 0}
  .hero-facts{grid-template-columns:1fr 1fr;row-gap:18px}
  .hero-facts>div:nth-child(2){border:0;margin:0;padding:0}
  .steps{grid-template-columns:1fr 1fr}
  .fgrid{grid-template-columns:1fr}
  .form .row2{grid-template-columns:1fr}
  footer .cols{grid-template-columns:1fr}
  .strip .wrap{height:auto;padding:8px 0;font-size:11px}
  .strip .hide-sm{display:none}
  .anchors{top:68px}
  header .wrap{height:68px}
}