:root{--blue:#0b3f78;--blue2:#1e5a96;--red:#cf5967;--text:#242a2f;--muted:#69757e;--line:#dce3e8;--light:#f4f7f9;--white:#fff;--max:1180px}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:#fff;line-height:1.65} a{color:inherit;text-decoration:none}.container{max-width:var(--max);margin:auto;padding:0 24px}
.site-header{background:#fff}.top{min-height:122px;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand img{width:360px;max-width:52vw;height:auto;display:block}.header-right{display:flex;align-items:center;gap:24px;font-size:15px}.phone{color:var(--text);font-weight:600}.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:#fff;padding:12px 20px;font-size:13px;font-weight:700;letter-spacing:.02em;border:1px solid var(--blue);transition:.2s}.btn:hover{background:#07315e}.btn-outline{background:#fff;color:var(--blue)}
.nav{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:0}.nav a{display:block;padding:15px 24px 13px;font-size:13px}.nav a:hover,.nav a.active{color:var(--blue);border-bottom:3px solid var(--blue)}
.hero{position:relative;min-height:390px;background:var(--light);overflow:hidden}.hero-media{position:absolute;inset:0 0 0 45%;background-image:linear-gradient(90deg,var(--light) 0%,rgba(244,247,249,.78) 10%,rgba(244,247,249,0) 34%),url('assets/hero-airplane.jpg');background-size:cover;background-position:center}.hero-content{position:relative;z-index:1;width:52%;padding:76px 0 70px}.eyebrow{font-size:13px;letter-spacing:.08em;color:var(--blue2);font-weight:700;text-transform:uppercase}.hero h1{font-size:42px;line-height:1.15;color:var(--blue);font-weight:700;margin:12px 0 20px}.hero p{font-size:18px;max-width:520px;margin:0 0 28px}
.services{padding:54px 0;border-bottom:1px solid var(--line)}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:0}.service{padding:12px 36px;border-right:1px solid var(--line)}.service:first-child{padding-left:0}.service:last-child{border-right:0}.icon{width:58px;height:58px;border:1px solid var(--blue2);border-radius:50%;display:grid;place-items:center;color:var(--blue);font-size:25px;margin-bottom:16px}.service h2{font-size:20px;color:var(--blue);margin:0 0 10px}.service p{margin:0 0 15px;color:var(--muted);font-size:14px}.more{color:var(--blue);font-size:12px;font-weight:700}
.content{padding:65px 0}.two{display:grid;grid-template-columns:1.35fr .65fr;gap:60px}.section-title{color:var(--blue);font-size:25px;margin:0 0 22px;line-height:1.25}.section-title:after{content:'';display:block;width:42px;border-top:2px solid var(--blue);margin-top:13px}.lead{font-size:17px}.muted{color:var(--muted)}.card{border:1px solid var(--line);padding:28px;background:#fff}.contact-card{background:var(--light)}.contact-card p{margin:0 0 12px}.portrait{width:100%;height:330px;object-fit:cover;object-position:center 20%}.split-photo{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.facts{list-style:none;padding:0;margin:18px 0}.facts li{padding:9px 0;border-bottom:1px solid var(--line)}
.page-hero{background:var(--light);padding:58px 0 52px;border-bottom:1px solid var(--line)}.page-hero h1{font-size:38px;color:var(--blue);margin:7px 0 10px}.page-hero p{max-width:760px;font-size:17px;margin:0;color:var(--muted)}.prose{max-width:850px}.prose h2{color:var(--blue);font-size:23px;margin-top:38px}.prose h3{color:var(--blue2);font-size:18px}.checklist{list-style:none;padding:0}.checklist li{position:relative;padding:7px 0 7px 26px}.checklist li:before{content:'✓';position:absolute;left:0;color:var(--red);font-weight:700}.notice{background:var(--light);border-left:3px solid var(--blue);padding:18px 22px;margin:26px 0}.cta{margin-top:34px}
.faq{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;padding:20px 4px;background:none;border:0;text-align:left;font-size:16px;font-weight:700;color:var(--text);display:flex;justify-content:space-between;cursor:pointer}.faq-q span:last-child{color:var(--blue);font-size:22px}.faq-a{display:none;padding:0 4px 20px;color:var(--muted)}.faq-item.open .faq-a{display:block}
.map-placeholder{min-height:320px;background:linear-gradient(135deg,#eef3f5,#dce7ec);display:grid;place-items:center;color:var(--blue);font-weight:700;border:1px solid var(--line)}
.footer{border-top:1px solid var(--line);margin-top:40px}.footer-inner{min-height:75px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px}.footer a{margin-right:18px;color:var(--blue)}
@media(max-width:850px){.top{min-height:100px}.header-right{gap:10px}.phone{display:none}.brand img{width:300px}.nav ul{overflow:auto}.nav a{padding:13px 14px;white-space:nowrap}.hero{min-height:0}.hero-media{position:relative;inset:auto;height:230px;background:linear-gradient(90deg,rgba(244,247,249,.2),rgba(244,247,249,0)),url('assets/hero-airplane.jpg') center/cover}.hero-content{width:auto;padding:42px 24px 48px}.hero h1{font-size:34px}.grid3,.two,.split-photo{grid-template-columns:1fr}.service{border-right:0;border-bottom:1px solid var(--line);padding:28px 0}.service:last-child{border-bottom:0}.two{gap:35px}.portrait{height:420px}.footer-inner{flex-direction:column;align-items:flex-start;padding:20px 0}}
@media(max-width:520px){.top{align-items:flex-start;padding:18px 0}.brand img{width:245px}.header-right .btn{padding:10px 12px;font-size:11px}.hero h1{font-size:30px}.page-hero h1{font-size:31px}.container{padding:0 18px}.content{padding:48px 0}}

/* Navigation: Untersuchungen-Untermenü */
.nav .nav-dropdown{position:relative}
.nav .nav-submenu{display:none;position:absolute;top:100%;left:0;min-width:205px;background:#fff;z-index:100;box-shadow:0 6px 20px rgba(0,0,0,.13);border:1px solid var(--line);padding:5px 0;list-style:none}
.nav .nav-dropdown:hover .nav-submenu,.nav .nav-dropdown:focus-within .nav-submenu{display:block}
.nav .nav-submenu li{display:block}
.nav .nav-submenu a{padding:12px 18px;border:0;white-space:nowrap}
.nav .nav-submenu a:hover{background:#f3f7fa;border:0}
@media(max-width:850px){.nav .nav-submenu{position:static;box-shadow:none;min-width:0}.nav .nav-dropdown:focus-within .nav-submenu{display:block}}

/* Clicking “Untersuchungen” opens the existing submenu rather than navigating to Klasse 2. */
.nav .nav-trigger{display:block;padding:15px 24px 13px;font:inherit;font-size:13px;line-height:inherit;text-align:left;color:inherit;background:none;border:0;cursor:pointer}
.nav .nav-trigger:hover,.nav .nav-trigger[aria-expanded="true"]{color:var(--blue)}
.nav .nav-dropdown.is-open .nav-submenu{display:block}
@media(max-width:850px){.nav .nav-trigger{padding:13px 14px;white-space:nowrap}}