@font-face{font-family:"Exo 2";src:url("fonts/Exo2.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
@font-face{font-family:"Saira";src:url("fonts/Saira.woff2") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
/* ============================================================
   AITECH ENGINEERING — Startseite
   Konzept: Richtung 03 + Beweise aus 01 · Signatur v2: Spindel-System
   CD-Manual v1.0: #E30A17 · Exo 2 + Saira · −6° · scharfe Ecken
   ============================================================ */
:root{
  --red:#E30A17; --red-deep:#C20813;
  --ink:#16181b; --ink2:#23262b;
  --muted:#6b7177; --line:#e2e5e9; --soft:#f4f5f7; --paper:#fff;
  --dark:#101114; --dark2:#17191d; --dark-line:#2a2d32;
  --skew:-6deg; --headh:76px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--paper);font-family:"Saira",system-ui,sans-serif;color:var(--ink);-webkit-font-smoothing:antialiased;overflow-x:hidden;padding-top:var(--headh);-webkit-tap-highlight-color:transparent;overflow-wrap:break-word}
img,svg{display:block;max-width:100%}
a{color:inherit}
::selection{background:var(--red);color:#fff}
:focus-visible{outline:3px solid var(--red);outline-offset:3px}
section{scroll-margin-top:calc(var(--headh) + 18px)}

.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;font-family:"Exo 2";font-weight:600;padding:10px 16px;z-index:1200}
.skip:focus{left:12px;top:12px}

.wrap{max-width:1180px;margin:0 auto;padding:0 clamp(20px,5vw,48px)}
.kicker{font-family:"Exo 2";font-weight:700;text-transform:uppercase;letter-spacing:.2em;color:var(--red);font-size:clamp(11px,1.2vw,13px)}
.num-mono{font-variant-numeric:tabular-nums}

/* ---------- Header ---------- */
header.site{position:fixed;top:0;left:0;right:0;height:var(--headh);background:rgba(255,255,255,.94);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:1000;transition:box-shadow .25s}
header.site.scrolled{box-shadow:0 6px 18px rgba(22,24,27,.07)}
.hbar{max-width:1320px;margin:0 auto;height:100%;padding:0 clamp(16px,3vw,32px);display:flex;align-items:center;justify-content:space-between;gap:20px}
.hlogo{display:flex;align-items:center;text-decoration:none}
.hlogo svg{height:46px;width:auto}
@media (max-width:400px){.hlogo svg{height:40px}}
nav.main{display:flex;align-items:center;gap:clamp(14px,2vw,28px)}
nav.main a.nl{text-decoration:none;font-family:"Exo 2";font-weight:600;font-size:14px;letter-spacing:.04em;color:var(--ink);padding:6px 2px;border-bottom:2px solid transparent;transition:border-color .2s,color .2s}
nav.main a.nl:hover{color:var(--red)}
nav.main a.nl.act{border-bottom-color:var(--red)}
.btn{display:inline-block;text-decoration:none;font-family:"Exo 2";font-weight:800;letter-spacing:.04em;transform:skewX(var(--skew));transition:transform .2s,background .2s,box-shadow .2s,color .2s,border-color .2s}
.btn>span{display:inline-block;transform:skewX(6deg)}
.btn.red{background:var(--red);color:#fff;box-shadow:0 4px 14px rgba(227,10,23,.18)}
.btn.red:hover{background:var(--red-deep);transform:skewX(var(--skew)) translateY(-2px);box-shadow:0 8px 20px rgba(227,10,23,.24)}
.btn.ghost{border:2px solid var(--ink);color:var(--ink)}
.btn.ghost:hover{border-color:var(--red);color:var(--red);transform:skewX(var(--skew)) translateY(-2px)}
.btn.sm{font-size:13.5px;padding:11px 18px}
.btn.lg{font-size:clamp(15px,1.8vw,19px);padding:16px 30px}

.burger{display:none;background:none;border:0;width:46px;height:46px;cursor:pointer;position:relative;z-index:1101}
.burger i,.burger i::before,.burger i::after{content:"";display:block;position:absolute;left:9px;width:28px;height:3px;background:var(--ink);transition:transform .25s,opacity .2s,top .25s}
.burger i{top:22px}
.burger i::before{left:0;top:-9px}
.burger i::after{left:0;top:9px}
html.menuopen .burger i{background:transparent}
html.menuopen .burger i::before{top:0;transform:rotate(45deg)}
html.menuopen .burger i::after{top:0;transform:rotate(-45deg)}
.mmenu{display:none}
@media (max-width:900px){
  nav.main{display:none}
  .burger{display:block}
  .mmenu{display:flex;position:fixed;inset:0;background:var(--ink);z-index:1100;flex-direction:column;align-items:flex-start;justify-content:center;gap:8px;padding:90px clamp(28px,8vw,60px);transform:translateY(-102%);transition:transform .35s cubic-bezier(.2,.8,.2,1)}
  html.menuopen .mmenu{transform:none}
  .mmenu a{color:#fff;text-decoration:none;font-family:"Exo 2";font-weight:800;font-size:clamp(26px,7vw,40px);letter-spacing:-.01em;padding:8px 0;transform:skewX(var(--skew))}
  .mmenu a:hover{color:var(--red)}
  .mmenu .mfoot{margin-top:30px;color:#9aa0a6;font-size:13px;transform:none}
  html.menuopen{overflow:hidden}
  html.menuopen .burger i::before,html.menuopen .burger i::after{background:#fff}
}

/* ---------- Spindel-System (Markensignatur) ----------
   1) Scroll-Spindel: Lesefortschritt als Messinstrument unter dem Header
   2) Schnittkanten: Sektionsuebergaenge im -6deg-System
   3) Selbstzeichnende Spindeln: Unterstreichung + Hover-Beleg     */
:root{ --seam:clamp(26px,10.5vw,130px); }

.scrollmeter{position:fixed;top:var(--headh);left:0;right:0;height:2px;z-index:990;pointer-events:none}
.scrollmeter .fill{position:absolute;inset:0;background:var(--red);clip-path:inset(0 100% 0 0)}

.rule{width:clamp(180px,22vw,280px);height:3px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 10' preserveAspectRatio='none'%3E%3Cpath d='M0,5 Q50,0 100,5 Q50,10 0,5 Z' fill='%23E30A17'/%3E%3C/svg%3E") no-repeat;background-size:100% 100%;clip-path:inset(0 100% 0 0);transition:clip-path .8s .15s cubic-bezier(.2,.7,.2,1);margin-top:16px}
.rule.rv{opacity:1;transform:none}
.rule.in{clip-path:inset(0)}
.hero .rule{width:clamp(300px,42vw,520px);margin-top:26px}

.threadwrap{position:relative}

/* ---------- Hero ---------- */
.hero{padding:clamp(64px,10vw,128px) 0 clamp(56px,8vw,96px)}
.hero h1{font-family:"Exo 2";font-weight:800;font-size:clamp(36px,5.6vw,76px);letter-spacing:-.02em;line-height:1.04;max-width:17ch}
.hero h1 em{font-style:normal;color:var(--red)}
.hero .sub{margin-top:22px;color:var(--muted);font-size:clamp(15px,1.7vw,19px);line-height:1.6;max-width:58ch}
.hero .ctas{margin-top:36px;display:flex;gap:18px;flex-wrap:wrap;align-items:center}

/* ---------- Abschnittsköpfe ---------- */
.shead{padding-top:clamp(56px,9vw,110px)}
.shead h2{font-family:"Exo 2";font-weight:800;font-size:clamp(28px,4vw,50px);letter-spacing:-.02em;line-height:1.06;margin-top:14px;max-width:22ch}
.shead .sub{margin-top:16px;color:var(--muted);font-size:clamp(14px,1.6vw,17px);line-height:1.6;max-width:62ch}

/* ---------- Leistungen (Weave-Cards) ---------- */
.svclist{margin:clamp(48px,7vw,84px) 0 clamp(72px,10vw,130px);display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(18px,2.6vw,28px)}
@media (max-width:880px){.svclist{grid-template-columns:1fr}}
.svc{position:relative;display:block;color:inherit;text-decoration:none;background:#fff;border:1px solid var(--line);transition:transform .25s,box-shadow .25s,border-color .25s}
.svc:hover,.svc:focus-within{transform:translateY(-3px);box-shadow:0 12px 26px rgba(22,24,27,.10);border-color:#c8cdd2}
.svc .in{padding:clamp(22px,3vw,30px) clamp(22px,3vw,34px)}
.svc:hover .svcmark,.svc:focus-within .svcmark{clip-path:inset(0)}
.svc .svcmark{display:block;width:190px;height:3px;margin-bottom:16px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 10' preserveAspectRatio='none'%3E%3Cpath d='M0,5 Q50,0 100,5 Q50,10 0,5 Z' fill='%23E30A17'/%3E%3C/svg%3E") no-repeat;background-size:100% 100%;clip-path:inset(0 100% 0 0);transition:clip-path .45s cubic-bezier(.2,.7,.2,1)}
.svc h3{font-family:"Exo 2";font-weight:700;font-size:clamp(18px,2.1vw,24px);margin-top:8px;letter-spacing:-.01em}
.svc p{color:var(--muted);font-size:clamp(13.5px,1.4vw,15.5px);line-height:1.6;margin-top:10px}

/* ---------- Beweis-Sektion (aus Richtung 01) ---------- */
.proof{background:var(--dark);color:#fff;clip-path:polygon(0 var(--seam),100% 0,100% calc(100% - var(--seam)),0 100%);padding-top:var(--seam)}
.proof .shead .sub{color:#b8bdc2}
.pscene{position:relative;height:190vh}
@media (max-width:760px){.pscene{height:155vh}}
.pscene .pin{position:sticky;top:var(--headh);height:calc(100vh - var(--headh));height:calc(100svh - var(--headh));overflow:hidden;display:flex;align-items:center;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:54px 54px}
.phint{font-family:"Exo 2";font-weight:700;text-transform:uppercase;letter-spacing:.18em;font-size:12px;color:#8b9197;margin-bottom:14px}
.readout{position:absolute;top:clamp(14px,3vh,28px);right:clamp(20px,5vw,48px);font-family:"Exo 2";font-weight:800;font-size:clamp(15px,2vw,21px);letter-spacing:.02em}
.readout b{color:var(--red)}
.rig{display:flex;align-items:center;max-width:760px;margin-top:clamp(10px,2vh,24px)}
.grip{flex:0 0 auto;width:42px;height:118px;background:#33373d;position:relative}
.grip::before{content:"";position:absolute;left:0;right:0;height:4px;background:var(--red);top:0}
.grip.r::before{top:auto;bottom:0}
.specimen{position:relative;flex:1;height:60px;background:linear-gradient(180deg,#3a3f46,#23262b);transform:scaleX(calc(1 + var(--p,0)*.13)) scaleY(calc(1 - var(--p,0)*.24));transform-origin:center}
.specimen::after{content:"";position:absolute;inset:0;background:var(--red);opacity:calc(var(--p,0)*.85)}
.gauge{position:absolute;top:-26px;bottom:-26px;left:calc(var(--p,0)*100%);width:2px;background:#fff;box-shadow:0 0 14px rgba(227,10,23,.9),0 0 3px #fff;z-index:3}
.ruler{max-width:760px;height:12px;margin-top:14px;background:repeating-linear-gradient(90deg,#4a4f56 0 2px,transparent 2px 38px)}
.stamp{position:absolute;right:clamp(16px,7vw,110px);bottom:clamp(64px,15vh,140px);border:3px solid var(--red);color:var(--red);padding:14px 20px;transform:rotate(-6deg) scale(1.7);opacity:0;transition:transform .3s cubic-bezier(.2,1.5,.4,1),opacity .25s;background:rgba(16,17,20,.72);backdrop-filter:blur(2px)}
.stamp.show{transform:rotate(-6deg) scale(1);opacity:1}
.stamp .big{font-family:"Exo 2";font-weight:800;font-size:clamp(22px,3vw,34px);letter-spacing:.06em;transform:skewX(var(--skew));line-height:1}
.stamp small{display:block;font-family:"Exo 2";font-weight:600;font-size:10px;letter-spacing:.16em;margin-top:6px}
.pprog{position:absolute;bottom:0;left:0;right:0;height:3px;background:rgba(127,134,140,.25)}
.pprog i{display:block;height:100%;width:calc(var(--p,0)*100%);background:var(--red)}
.pstats{background:var(--dark2);border-top:1px solid var(--dark-line);padding:clamp(48px,7vw,84px) 0 calc(clamp(48px,7vw,84px) + var(--seam))}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:clamp(20px,3vw,40px)}
.stat{border-top:2px solid var(--dark-line);padding-top:16px;position:relative}
.stat::before{content:"";position:absolute;top:-2px;left:0;width:34px;height:2px;background:var(--red)}
.stat .v{font-family:"Exo 2";font-weight:800;font-size:clamp(30px,3.6vw,46px);letter-spacing:-.01em}
.stat .v small{font-size:.5em;font-weight:700;color:#9aa0a6;margin-left:4px}
.stat .l{color:#9aa0a6;font-size:13.5px;margin-top:6px}
.pnote{margin-top:26px;color:#8b9197;font-size:12.5px}

/* ---------- Nachhaltigkeits-Band ---------- */
.band{background:var(--red);color:#fff;clip-path:polygon(0 var(--seam),100% 0,100% calc(100% - var(--seam)),0 100%);padding:calc(clamp(34px,5vw,52px) + var(--seam)*.7) 0;margin-top:calc(var(--seam)*-1 + 14px);position:relative;overflow:hidden}
.band .bigA{position:absolute;right:-1vw;top:50%;transform:translateY(-50%) skewX(var(--skew));font-family:"Exo 2";font-weight:800;font-size:clamp(140px,20vw,240px);line-height:.8;opacity:.10;user-select:none}
.band p{font-family:"Exo 2";font-weight:700;font-size:clamp(17px,2.4vw,26px);letter-spacing:-.01em;line-height:1.35;max-width:34ch;position:relative;z-index:1}
.band p b{color:#fff;background:rgba(0,0,0,.18);padding:0 .25em;transform:skewX(var(--skew));display:inline-block}

/* ---------- Netzwerk ---------- */
.tiles{margin:clamp(40px,6vw,64px) 0 clamp(64px,9vw,110px);display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:clamp(16px,2.4vw,26px)}
.tile{background:#fff;border:1px solid var(--line);border-top:3px solid var(--red);padding:clamp(20px,2.8vw,28px);transition:transform .25s,box-shadow .25s}
.tile:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(22,24,27,.10)}
.tile h3{font-family:"Exo 2";font-weight:700;font-size:clamp(16.5px,1.8vw,20px);letter-spacing:-.01em}
.tile p{color:var(--muted);font-size:clamp(13px,1.4vw,15px);line-height:1.6;margin-top:10px}

/* ---------- Unternehmen ---------- */
.company{background:var(--soft);padding-bottom:clamp(64px,9vw,110px)}
.ccols{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,5vw,70px);align-items:start;margin-top:clamp(36px,5vw,56px)}
.ccols .txt p{color:#3c4147;font-size:clamp(14px,1.55vw,16.5px);line-height:1.65}
.ccols .txt p + p{margin-top:14px}
.ccols .txt b{color:var(--ink);font-weight:600}
@media (max-width:880px){.ccols{grid-template-columns:1fr}}

/* ---------- Kontakt ---------- */
.contact{padding:clamp(70px,11vw,140px) 0 clamp(80px,11vw,140px);text-align:center}
.contact h2{font-family:"Exo 2";font-weight:800;font-size:clamp(30px,4.6vw,56px);letter-spacing:-.02em;line-height:1.05}
.contact h2 em{font-style:normal;color:var(--red)}
.contact .sub{margin-top:16px;color:var(--muted);font-size:clamp(14px,1.6vw,17px);max-width:52ch;margin-left:auto;margin-right:auto;line-height:1.6}
.contact .ctas{margin-top:34px;display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.contact .crow{margin-top:34px;display:flex;gap:14px 36px;justify-content:center;flex-wrap:wrap;font-size:15px;color:var(--muted)}
.contact .crow a{color:var(--ink);text-decoration:none;border-bottom:1px solid var(--red);font-weight:500}

/* ---------- Footer ---------- */
footer.site{background:var(--ink);color:#cfd3d8;padding:clamp(44px,6vw,68px) 0 clamp(28px,4vw,40px)}
footer.site .frow{display:flex;flex-wrap:wrap;gap:30px 60px;align-items:flex-start;justify-content:space-between}
footer.site .flogo{text-align:center}
footer.site .flogo svg{width:190px;height:auto}
footer.site .fsince{display:block;width:190px;margin-top:11px;text-align:center;font-family:"Exo 2";font-weight:600;font-size:11.5px;letter-spacing:.32em;text-transform:uppercase;color:#8b9197}
footer.site nav{display:flex;flex-direction:column;gap:8px}
footer.site nav a{color:#cfd3d8;text-decoration:none;font-family:"Exo 2";font-weight:600;font-size:13.5px;letter-spacing:.04em;padding:4px 0}
footer.site nav a:hover{color:#fff}
footer.site .faddr{font-size:13.5px;line-height:1.7}
footer.site .faddr a{color:#fff;text-decoration:none;border-bottom:1px solid var(--red)}
footer.site .legal{margin-top:34px;padding-top:18px;border-top:1px solid var(--dark-line);display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;font-size:12px;color:#8b9197}
footer.site .legal a{color:#cfd3d8;text-decoration:none;display:inline-block;padding:3px 0}
footer.site .legal a:hover{color:#fff}

/* ---------- Reveals & Motion-Disziplin ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none !important;animation:none !important}
  .rv{opacity:1;transform:none}
  .rule,.svc .svcmark{clip-path:none}
}
html.rm .rv{opacity:1;transform:none}
html.rm .rule,html.rm .svc .svcmark{clip-path:none}
html.rm .scrollmeter{display:none}
/* Meilensteine */
.miles{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:clamp(16px,2.4vw,26px);margin-top:clamp(28px,4vw,42px)}
.mile{border-top:2px solid var(--line);padding-top:12px;position:relative}
.mile::before{content:"";position:absolute;top:-2px;left:0;width:34px;height:2px;background:var(--red)}
.mile .y{font-family:"Exo 2";font-weight:800;color:var(--red);font-size:17px;letter-spacing:.02em}
.mile p{color:var(--muted);font-size:13.5px;line-height:1.55;margin-top:6px}

/* Druck */
@media print{header.site,.scrollmeter,.burger,.mmenu{display:none!important}body{padding-top:0}.proof,.band{clip-path:none}.rv{opacity:1;transform:none}}

h1 em,h2 em{font-style:normal;color:var(--red)}
.lbody,.legaldoc p,.ccols .txt p{-webkit-hyphens:auto;hyphens:auto}

/* Sprachumschalter */
.langsw{display:flex;align-items:center;gap:2px;font-family:"Exo 2";font-weight:600;font-size:13px;letter-spacing:.06em}
.langsw a,.langsw .on{padding:6px 6px;border-bottom:2px solid transparent;line-height:1}
.langsw a{text-decoration:none;color:var(--muted);transition:color .2s}
.langsw a:hover{color:var(--red)}
.langsw .on{color:var(--ink);border-bottom-color:var(--red)}
.langsw .sep{color:var(--line);padding:0 1px;border:0}
.mmenu .langsw{margin-top:26px;transform:none;gap:4px}
.mmenu .langsw a,.mmenu .langsw .on{color:#9aa0a6;font-size:16px;padding:6px 8px}
.mmenu .langsw .on{color:#fff;border-bottom-color:var(--red)}
.mmenu .langsw .sep{color:#3a3f46}