/* Tiansun site styles - shared by all pages. Extracted 2026-10-13. */
:root{--ink:#0f1b2d;--muted:#4a5868;--mint:#e4f3f1;--mist:#f3f6f9;--teal:#2de0cf;--green:#00796b;--line:#dde4ea;--white:#fff}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:auto}
html,body{min-height:100%}
body{display:flex;flex-direction:column;font-family:Manrope,"Segoe UI",Helvetica,Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
:focus-visible{outline:3px solid var(--green);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.eyebrow{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--green);margin-bottom:12px}
h1{font-size:clamp(38px,5.4vw,56px);line-height:1.1;font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(28px,3.6vw,38px);line-height:1.15;font-weight:800;letter-spacing:-.02em}
.sub{color:var(--muted);max-width:520px;margin-top:12px}
main{flex:1}
section{padding:80px 0}
.btn{display:inline-block;font:600 14px Manrope,sans-serif;padding:12px 20px;border-radius:8px;border:1px solid var(--ink);cursor:pointer;transition:background .15s,color .15s}
.btn.dark{background:var(--ink);color:#fff}
.btn.dark:hover{background:#1d3250}
.btn.teal{background:var(--teal);border-color:var(--teal);color:var(--ink)}
.btn.teal:hover{background:#5beadc}
.btn.ghost{background:transparent}
.btn.ghost:hover{background:var(--ink);color:#fff}

/* header */
header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:17px;letter-spacing:.02em}
nav ul{display:flex;align-items:center;gap:28px;list-style:none;font-size:14px;font-weight:500}
nav a:not(.btn):hover,nav a[aria-current="page"]:not(.btn){color:var(--green)}
nav a[aria-current="page"]:not(.btn){text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:8px}
nav .btn{padding:10px 18px;border-radius:6px}

/* hero */
.hero{background:var(--mint);padding:72px 0 64px}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.hero p.lead{margin:20px 0 28px;color:var(--muted);font-size:17px;max-width:440px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.trust{margin-top:28px;font-size:13px;color:var(--muted)}
.art{background:#fff;border-radius:12px;aspect-ratio:1.3/1;display:flex;align-items:center;justify-content:center;gap:28px;padding:24px;overflow:hidden}
.art img{width:100%;height:100%;object-fit:contain}
.art svg{height:78%;width:auto}
.art svg+svg{height:52%;align-self:flex-end;margin-bottom:8%}

/* systems */
.cards{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:44px}
.card{border:1px solid var(--line);border-radius:12px;padding:20px;background:#fff;display:flex;flex-direction:column}
.card .pic{background:#fff;border-radius:10px;height:320px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.card .pic img{width:100%;height:100%;object-fit:contain;padding:14px}
.card .pic svg{height:78%;width:auto}
.card .tag{margin-top:24px;margin-bottom:8px}
.card h3{font-size:22px;font-weight:700;line-height:1.25}
.card p{color:var(--muted);font-size:14px;margin:12px 0}
.card .out{font-weight:700;font-size:14px;margin-bottom:12px}
table{width:100%;border-collapse:collapse;font-size:13px;margin-bottom:22px}
td{padding:9px 0;border-bottom:1px solid var(--line);color:var(--muted)}
td+td{color:var(--ink)}
tr:last-child td{border-bottom:0}
td:first-child{width:38%}
.card .cta-row{margin-top:auto}

/* steps */
.how{background:var(--mist)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:36px}
.step{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px 20px}
.step b.n{display:block;font-size:34px;font-weight:800;color:var(--green);line-height:1.1;margin-bottom:12px}
.step h3{font-size:16px;font-weight:700}
.step p{font-size:13.5px;color:var(--muted);margin-top:6px}

/* applications */
.apps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:36px}
.app{border-top:3px solid var(--teal);padding-top:16px}
.app h3{font-size:17px;font-weight:700}
.app p{font-size:14px;color:var(--muted);margin-top:6px}

/* results */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
.tile{border:1.5px dashed #b9c5d0;border-radius:12px;aspect-ratio:1.3/1;display:flex;align-items:center;justify-content:center;text-align:center;padding:20px;font-size:13px;color:var(--muted);background:#fff}

/* faq */
.faq{background:var(--mist)}
.faq-list{max-width:760px;margin-top:32px}
details{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:10px;padding:0 20px}
summary{cursor:pointer;font-weight:700;font-size:15.5px;padding:18px 0;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:22px;line-height:1;color:var(--green);transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details p{color:var(--muted);font-size:14.5px;padding-bottom:18px}

/* contact */
.contact{background:#fff;color:var(--ink)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.contact ul{list-style:none;margin-top:24px;font-size:14.5px;color:var(--ink)}
.contact li{padding:6px 0}
.contact li a{color:var(--green);border-bottom:1px solid var(--line)}
.contact li a:hover{color:var(--teal);border-bottom-color:var(--teal)}
form{background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:24px;display:grid;gap:14px}
label{font-size:12.5px;font-weight:600;display:grid;gap:6px}
input,select,textarea{font:400 14px Manrope,sans-serif;padding:11px 12px;border:1px solid #c7d1db;border-radius:8px;width:100%;color:var(--ink);background:#fff}
textarea{min-height:96px;resize:vertical}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
#msg{font-size:13px;color:var(--green);min-height:18px}

footer{padding:28px 0;font-size:13px;color:var(--muted);border-top:1px solid var(--line)}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

@media(max-width:860px){
  .nav{flex-direction:column;align-items:flex-start;height:auto;padding:12px 0 10px;gap:2px}
  nav{width:100%}
  nav ul{flex-wrap:wrap;gap:0 22px;white-space:normal}
  nav li{display:flex}
  nav a:not(.btn){display:inline-block;padding:9px 0;font-size:14px}
  nav .btn{margin:8px 0 6px;padding:11px 18px}
  .hero-grid,.cards,.contact-grid{grid-template-columns:1fr}
  .steps,.apps{grid-template-columns:1fr 1fr}
  .tiles{grid-template-columns:1fr}
  section{padding:56px 0}
}
@media(max-width:520px){.steps,.apps,.two{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

body{min-height:100vh}
main.home{display:block}
main.home .hero{width:100%}
section:not(.hero) h1{font-size:clamp(28px,3.6vw,38px);line-height:1.15;font-weight:800;letter-spacing:-.02em}
.flinks{display:flex;gap:18px;flex-wrap:wrap;list-style:none}
.flinks a:hover{color:var(--green)}
.feature{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:20px;margin-top:40px;background:#fff}
.feature img,figure img{width:100%;height:auto;display:block;border-radius:10px}
.feature h3{font-size:24px;line-height:1.25;font-weight:700}
.feature p{color:var(--muted);font-size:14.5px;margin:12px 0}
.feature table{margin-top:8px}
figure{margin:0}
figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px}
.tw{overflow-x:auto;margin-top:32px}
.cmp{min-width:560px;background:#fff;border:1px solid var(--line);border-radius:10px;border-collapse:separate;border-spacing:0;overflow:hidden}
.cmp th{text-align:left;font-size:13px;padding:12px 16px;background:var(--mint)}
.cmp td{padding:12px 16px;font-size:14px}
.cmp td:first-child{width:24%;font-weight:600;color:var(--ink)}
.cmp td:last-child{color:var(--ink);font-weight:600}
.proof{display:flex;gap:28px;flex-wrap:wrap;margin-top:24px;font-size:14px;color:var(--muted)}
.proof b{display:block;font-size:26px;color:var(--green);line-height:1.2}
.steps.six{grid-template-columns:repeat(3,1fr)}
.wide{margin-top:32px}
.wide img{max-width:720px;margin:0 auto}
.gallery.g2{grid-template-columns:repeat(2,1fr);gap:16px;width:66.6667%;margin-left:auto;margin-right:auto}
.gallery.g2 figure{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}
.gallery.g2 figure img{aspect-ratio:1/1;object-fit:contain;border-radius:8px}
@media(max-width:860px){.gallery.g2{grid-template-columns:1fr;width:auto}}
.gallery.g3{grid-template-columns:repeat(2,1fr);gap:28px}
.gallery.g3 figure{background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px}
.gallery.g3 figure img{aspect-ratio:4/3;object-fit:cover;border-radius:8px}
.feature+.feature{margin-top:28px}
.feature.rev>div:first-child{order:2}
@media(max-width:860px){.feature,.gallery{grid-template-columns:1fr}.feature.rev>div:first-child{order:0}.steps.six{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.steps.six{grid-template-columns:1fr}}

/* about us */
.about-head{background:var(--mint);padding:76px 0 68px}
.about-head h1{max-width:780px}
.about-head .lead{margin-top:24px;font-size:17px;line-height:1.7;color:var(--muted);max-width:620px}
.about-body{padding:76px 0 92px}
.about-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(280px,1fr);gap:72px;align-items:start}
.about-prose p{font-size:16.5px;line-height:1.9;color:var(--muted);margin-bottom:28px;max-width:64ch}
.about-prose p.standout{font-size:18px;line-height:1.75;color:var(--ink)}
.about-prose p:last-of-type{margin-bottom:0}
.about-prose strong{color:var(--ink);font-weight:700}
.about-prose .cta-row{margin-top:40px}
.about-facts{background:var(--mist);border:1px solid var(--line);border-radius:14px;padding:32px 30px;position:sticky;top:88px}
.about-facts h2{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--green)}
.about-facts ul{list-style:none;margin-top:20px}
.about-facts li{padding:18px 0;border-bottom:1px solid var(--line);font-size:13.5px;line-height:1.55;color:var(--muted)}
.about-facts li:last-child{border-bottom:0;padding-bottom:0}
.about-facts li strong{display:block;font-size:20px;font-weight:800;color:var(--ink);letter-spacing:-.01em;margin-bottom:4px}
@media (max-width:900px){
  .about-grid{grid-template-columns:1fr;gap:44px}
  .about-facts{position:static}
  .about-head{padding:56px 0 48px}
  .about-body{padding:52px 0 64px}
  .about-prose p{font-size:16px;line-height:1.85;margin-bottom:22px}
}

/* about us - studio (text left, 2x2 photo grid right) */
.studio{background:var(--mist)}
.studio-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.studio-grid .gallery{margin-top:0}
.studio-grid .sub{max-width:none;margin-top:16px}
@media (max-width:900px){
  .studio-grid{grid-template-columns:1fr;gap:36px}
  .studio-grid .gallery{max-width:480px}
}
@media (max-width:520px){.gallery.g3{gap:14px}}

/* social icon links */
.social{display:flex;gap:12px;margin-top:22px}
.social a{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:#fff;border:1px solid var(--line);border-radius:10px;color:var(--ink);transition:border-color .15s,color .15s}
.social a:hover{color:var(--green);border-color:var(--green)}
.social svg{width:19px;height:19px;fill:currentColor}
.hero .social a{width:42px;height:42px;border-radius:11px}
.hero .social svg{width:21px;height:21px}
.studio .social{margin-top:26px}
.studio .social a{width:36px;height:36px;border-radius:9px}
.studio .social svg{width:18px;height:18px}

/* form honeypot - hidden from humans, catches bots */
.hp{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;opacity:0}

/* keep original visual size after h3 -> h2 heading promotion */
.cards .card h2{font-size:22px;font-weight:700;line-height:1.25}
.steps .step h2{font-size:16px;font-weight:700}
.apps .app h2{font-size:17px;font-weight:700}

/* homepage content blocks */
main.home .home-facts{padding:0 0 72px;background:var(--mint)}
main.home .home-systems,main.home .home-flow,main.home .home-uses{padding:72px 0}
main.home .home-systems,main.home .home-uses{background:#fff}
main.home .home-flow{background:var(--mist)}
main.home .proof{display:grid;grid-template-columns:repeat(3,1fr);gap:32px 28px;margin-top:36px}
main.home .card .pic{height:240px}
main.home .home-systems .cta-row,main.home .home-flow .cta-row,main.home .home-uses .cta-row{margin-top:32px}
@media(max-width:860px){
  main.home .proof{grid-template-columns:1fr 1fr}
  main.home .card .pic{height:200px}
}
@media(max-width:520px){main.home .proof{grid-template-columns:1fr}}