/* Langtai Machinery — premium navy + brass */
:root{
--ink:#0A1826;           /* near-black blue: body headings on light */
--navy:#0D2238;          /* primary deep navy */
--navy-2:#122E4C;        /* lighter navy for panels */
--navy-deep:#081422;     /* darkest: topbar/footer */
--brass:#C9A961;         /* brass accent */
--brass-dark:#A8863F;
--brass-soft:#E4D3A8;
--steel:#F4F6F8;         /* light section bg */
--paper:#FFFFFF;
--body:#2A3947;          /* body text */
--muted:#5C6C7B;
--line:#E3E9EF;          /* hairline */
--mono:'Courier New',ui-monospace,monospace;
--sans:-apple-system,'Segoe UI','Helvetica Neue',Arial,sans-serif}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--sans);color:var(--body);background:var(--paper);line-height:1.7;font-size:16px}
img{max-width:100%;display:block}a{color:inherit}
.wrap{max-width:1100px;margin:0 auto;padding:0 22px}
/* top bar */
.topbar{background:var(--navy-deep);color:#8FA5B8;font-size:12.5px;letter-spacing:.02em}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding:8px 22px;flex-wrap:wrap}
.topbar a{color:#B9C9D8;text-decoration:none}.topbar a:hover{color:#fff}
/* nav */
header.site{background:var(--navy);color:#fff;position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(201,169,97,.25)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 22px;gap:14px}
.logo{font-weight:700;letter-spacing:.22em;font-size:15px;text-decoration:none;white-space:nowrap}
.logo span{color:var(--brass)}
.nav ul{display:flex;gap:26px;list-style:none;align-items:center}
.nav ul a{text-decoration:none;font-size:14px;opacity:.85;letter-spacing:.03em}
.nav ul a:hover{opacity:1;color:var(--brass-soft)}
@media(max-width:860px){.nav ul{display:none}}
/* buttons */
.btn{display:inline-block;background:var(--brass);color:var(--navy-deep);text-decoration:none;font-weight:700;
padding:13px 28px;border-radius:3px;border:none;font-size:14.5px;cursor:pointer;letter-spacing:.04em;transition:background .15s}
.btn:hover{background:var(--brass-soft)}
.btn.small{padding:10px 20px;font-size:13.5px}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,.4);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.7)}
.btn.line{background:transparent;border:1px solid var(--brass);color:var(--brass-dark)}
.btn.line:hover{background:var(--brass);color:var(--navy-deep)}
/* type */
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.24em;color:var(--brass-dark);text-transform:uppercase;margin-bottom:16px}
h1{font-size:clamp(28px,4.6vw,44px);line-height:1.15;font-weight:700;letter-spacing:-.015em;color:#fff}
h2{font-size:clamp(22px,3.1vw,30px);color:var(--ink);letter-spacing:-.01em;line-height:1.3;font-weight:700}
section{padding:72px 0}
.sec-head{margin-bottom:38px;max-width:62ch}
.sec-head p{margin-top:12px;color:var(--muted)}
/* hero */
.hero{background:linear-gradient(165deg,var(--navy) 0%,var(--navy-deep) 90%);color:#fff;padding:76px 0 84px;position:relative}
.hero::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,var(--brass),transparent)}
.hero .eyebrow{color:var(--brass)}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
@media(max-width:840px){.hero .wrap{grid-template-columns:1fr}}
.hero p.lead{margin:20px 0 32px;font-size:17px;color:#AEC2D4;max-width:50ch;line-height:1.75}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
/* inner page hero */
.page-hero{background:linear-gradient(165deg,var(--navy) 0%,var(--navy-deep) 90%);color:#fff;padding:52px 0;position:relative}
.page-hero::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,var(--brass),transparent)}
.page-hero .eyebrow{color:var(--brass)}
.page-hero p{margin-top:14px;color:#AEC2D4;max-width:62ch}
/* nameplate placeholder — brass rivets */
.plate{background:var(--steel);border:1px solid var(--line);border-radius:4px;position:relative;overflow:hidden}
.plate::before,.plate::after,.plate .rivet-a,.plate .rivet-b{content:'';position:absolute;width:6px;height:6px;border-radius:50%;
background:radial-gradient(circle at 35% 35%,#F2E4BE 0%,var(--brass) 55%,#8A6D33 100%)}
.plate::before{top:9px;left:9px}.plate::after{top:9px;right:9px}
.plate .rivet-a{bottom:9px;left:9px}.plate .rivet-b{bottom:9px;right:9px}
.photo-slot{display:flex;flex-direction:column;align-items:center;justify-content:center;color:#7A8A99;
font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-align:center;gap:9px;padding:20px}
.photo-slot .frame{width:44px;height:34px;border:1.5px solid #A9B7C4;border-radius:3px;position:relative}
.photo-slot .frame::after{content:'';position:absolute;left:5px;bottom:5px;width:0;height:0;
border-left:9px solid transparent;border-right:9px solid transparent;border-bottom:10px solid #A9B7C4}
.hero .plate{box-shadow:0 30px 60px rgba(0,0,0,.45);border-color:rgba(201,169,97,.3)}
.hero .photo-slot{color:#5E7385}
/* strip — quiet dark band, hairline dividers */
.strip{background:var(--navy-2);color:#fff;border-top:1px solid rgba(201,169,97,.2);border-bottom:1px solid rgba(201,169,97,.2)}
.strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);padding:0 22px}
.strip .cell{padding:24px 20px 24px 0;font-size:13.5px;line-height:1.6;color:#9FB4C6;border-left:1px solid rgba(255,255,255,.08);padding-left:20px}
.strip .cell:first-child{border-left:none;padding-left:0}
.strip .cell b{display:block;font-size:15px;margin-bottom:4px;color:#fff;letter-spacing:.02em}
@media(max-width:820px){.strip .wrap{grid-template-columns:1fr 1fr;row-gap:1px}.strip .cell{border-left:none;padding-left:0}}
/* doors */
.doors{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:820px){.doors{grid-template-columns:1fr}}
.door{border:1px solid var(--line);border-radius:4px;padding:30px 26px;text-decoration:none;background:#fff;display:flex;flex-direction:column;gap:11px;transition:border-color .15s,box-shadow .15s;position:relative}
.door::before{content:'';position:absolute;top:0;left:26px;right:26px;height:2px;background:var(--brass);opacity:.85}
.door:hover{border-color:#CDD8E2;box-shadow:0 16px 40px rgba(10,24,38,.08)}
.door .q{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--brass-dark);text-transform:uppercase}
.door h3{color:var(--ink);font-size:18.5px;font-weight:700}
.door p{font-size:14px;color:var(--muted);flex:1}
.door .go{font-weight:700;color:var(--brass-dark);font-size:14px;letter-spacing:.02em}
/* app cards */
.grid-apps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:900px){.grid-apps{grid-template-columns:1fr 1fr}}
@media(max-width:580px){.grid-apps{grid-template-columns:1fr}}
.a-card{border:1px solid var(--line);border-radius:4px;overflow:hidden;text-decoration:none;background:#fff;display:flex;flex-direction:column;transition:border-color .15s,box-shadow .15s}
.a-card:hover{border-color:#CDD8E2;box-shadow:0 16px 40px rgba(10,24,38,.08)}
.a-card .photo-slot{aspect-ratio:16/9;background:var(--steel);border-bottom:1px solid var(--line)}
.a-body{padding:18px 20px 20px}
.a-body h3{color:var(--ink);font-size:16.5px;margin-bottom:6px;font-weight:700}
.a-body p{font-size:13.5px;color:var(--muted)}
/* machine cards */
.grid-machines{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:700px){.grid-machines{grid-template-columns:1fr}}
.m-card{border:1px solid var(--line);border-radius:4px;overflow:hidden;background:#fff;display:flex;flex-direction:column}
.m-card .photo-slot{aspect-ratio:16/9;background:var(--steel);border-bottom:1px solid var(--line)}
.m-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.m-body h3{color:var(--ink);font-size:17.5px;font-weight:700}
.m-tag{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--brass-dark);text-transform:uppercase}
.m-body p{font-size:14px;color:var(--muted);flex:1}
/* spec table */
table.spec{width:100%;border-collapse:collapse;font-size:13.5px;margin:14px 0}
table.spec th,table.spec td{border:1px solid var(--line);padding:10px 13px;text-align:left;vertical-align:top}
table.spec th{background:var(--steel);color:var(--ink);width:38%;font-weight:600}
/* why */
.why{background:var(--steel)}
.why-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:38px;align-items:start}
@media(max-width:840px){.why-grid{grid-template-columns:1fr}}
.diff{background:#fff;border:1px solid var(--line);border-left:2px solid var(--brass);border-radius:4px;padding:20px 22px;margin-bottom:16px}
.diff b{color:var(--ink);display:block;margin-bottom:5px;font-size:15.5px}
.diff span{font-size:14px;color:var(--muted)}
.hanna{background:var(--navy);color:#fff;border-radius:4px;padding:28px;display:flex;flex-direction:column;gap:14px;border:1px solid rgba(201,169,97,.3)}
.hanna .photo-slot{aspect-ratio:1/1;max-width:170px;border-radius:4px;background:var(--navy-2);color:#7E97AD}
.hanna h3{font-size:20px;font-weight:700}
.hanna p{font-size:14.5px;color:#AEC2D4}
/* steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:step}
@media(max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:4px;padding:20px 17px;counter-increment:step}
.step::before{content:counter(step,decimal-leading-zero);font-family:var(--mono);color:var(--brass-dark);font-size:12.5px;letter-spacing:.12em;display:block;margin-bottom:9px}
.step b{display:block;color:var(--ink);font-size:14.5px;margin-bottom:4px}
.step span{font-size:13px;color:var(--muted)}
/* cases */
.grid-cases{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:820px){.grid-cases{grid-template-columns:1fr}}
.c-card{border:1px solid var(--line);border-left:2px solid var(--brass);border-radius:4px;padding:22px}
.c-card .m-tag{color:var(--navy)}
.c-card h3{color:var(--ink);font-size:16px;margin:7px 0 8px;font-weight:700}
.c-card p{font-size:14px;color:var(--muted)}
/* faq */
.faq{border:1px solid var(--line);border-radius:4px;padding:6px 24px;background:#fff}
.faq details{border-bottom:1px solid var(--line);padding:15px 0}
.faq details:last-child{border-bottom:none}
.faq summary{font-weight:700;color:var(--ink);cursor:pointer;font-size:15px}
.faq details p{margin-top:9px;font-size:14px;color:var(--muted)}
/* inquiry */
.inquiry{background:linear-gradient(165deg,var(--navy) 0%,var(--navy-deep) 90%);color:#fff;position:relative}
.inquiry::before{content:'';position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,var(--brass),transparent)}
.inquiry h2{color:#fff}
.inquiry .eyebrow{color:var(--brass)}
.cols2{display:grid;grid-template-columns:1fr 1.1fr;gap:46px}
@media(max-width:820px){.cols2{grid-template-columns:1fr}}
.inquiry .side p{margin:13px 0;color:#AEC2D4}
.contact-line a{color:#fff}
form{display:grid;gap:13px}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:13px}
@media(max-width:560px){.f-row{grid-template-columns:1fr}}
label{font-size:12.5px;font-weight:600;color:#93AAC0;display:block;margin-bottom:6px;letter-spacing:.03em}
input,select,textarea{width:100%;padding:12px 13px;border-radius:3px;border:1px solid #2C4763;background:var(--navy-2);color:#fff;font-size:15px;font-family:var(--sans)}
input::placeholder,textarea::placeholder{color:#6B839B}
input:focus,select:focus,textarea:focus,.btn:focus-visible,a:focus-visible{outline:2px solid var(--brass);outline-offset:2px}
textarea{min-height:96px;resize:vertical}
/* footer */
footer{background:var(--navy-deep);color:#7E96AB;font-size:13.5px;padding:40px 0;border-top:1px solid rgba(201,169,97,.2)}
footer .cols{display:flex;justify-content:space-between;gap:26px;flex-wrap:wrap}
footer b{color:#fff;display:block;margin-bottom:7px;letter-spacing:.03em}
footer a{color:#A9BDCF;text-decoration:none}footer a:hover{color:var(--brass-soft)}
/* whatsapp — keeps its own green, recognizable */
.wa-float{position:fixed;right:16px;bottom:16px;z-index:99;background:#25D366;color:#fff;text-decoration:none;
display:flex;align-items:center;gap:8px;padding:12px 17px;border-radius:999px;font-weight:700;font-size:15px;
box-shadow:0 10px 26px rgba(0,0,0,.3)}
.wa-float:hover{background:#1EBE59}
.wa-float svg{width:20px;height:20px;fill:#fff}
/* breadcrumbs */
.crumb{font-size:13px;color:#7E97AD;margin-bottom:12px;font-family:var(--mono);letter-spacing:.04em}
.crumb a{color:#7E97AD;text-decoration:none}.crumb a:hover{color:var(--brass-soft)}

/* cta band */
.cta-band{background:linear-gradient(165deg,var(--navy) 0%,var(--navy-deep) 90%);color:#fff;text-align:center;padding:64px 0;position:relative}
.cta-band::before,.cta-band::after{content:'';position:absolute;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--brass),transparent)}
.cta-band::before{top:0}.cta-band::after{bottom:0}
.cta-band h2{color:#fff}
.cta-band .eyebrow{color:var(--brass)}
.cta-band p{max-width:56ch;margin:14px auto 26px;color:#AEC2D4}
/* support cards */
.sup-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:900px){.sup-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.sup-grid{grid-template-columns:1fr}}
.sup{background:#fff;border:1px solid var(--line);border-top:2px solid var(--brass);border-radius:4px;padding:22px 20px}
.sup b{display:block;color:var(--ink);font-size:15.5px;margin-bottom:6px}
.sup span{font-size:13.5px;color:var(--muted)}
/* chip bar */
.chipbar{background:var(--steel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.chipbar .wrap{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-top:16px;padding-bottom:16px}
.chiplabel{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;margin-right:4px}
.chip{border:1px solid var(--brass);color:var(--brass-dark);text-decoration:none;font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;transition:background .15s}
.chip:hover{background:var(--brass);color:var(--navy-deep)}

/* FINAL: light steel-blue hero (no grid) */
.hero{background:linear-gradient(170deg,#F0F5F9 0%,#DEE9F1 100%);color:var(--ink);padding:80px 0 88px;position:relative}
.hero::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,var(--brass),transparent)}
.hero .eyebrow{color:var(--brass-dark)}
.hero h1{color:#0E2A44}
.hero p.lead{color:#41556A}
.hero .btn.ghost{border-color:#0E2A44;color:#0E2A44}
.hero .btn.ghost:hover{background:rgba(14,42,68,.06)}
.hero .plate{box-shadow:0 24px 50px rgba(14,42,68,.16);background:#fff;border-color:#C9D6E2}
.page-hero{background:linear-gradient(170deg,#F0F5F9 0%,#DEE9F1 100%);color:var(--ink);padding:48px 0;position:relative}
.page-hero::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,var(--brass),transparent)}
.page-hero .eyebrow{color:var(--brass-dark)}
.page-hero h1{color:#0E2A44}
.page-hero p{color:#41556A}
.crumb{color:#6B8195}
.crumb a{color:#6B8195}
.crumb a:hover{color:#0E2A44}