/* YouSu Precision - SEO landing pages - shared styles
   Brand-aligned, no external fonts, static & crawlable. */
:root{
  --navy:#0a2540;--navy2:#0e3a6b;--blue:#1769c2;--orange:#ff6b2c;--orange2:#f59e0b;
  --bg:#f5f8fc;--ink:#16263d;--muted:#5b6b7f;--line:#e4ebf3;--white:#fff;
  --shadow:0 10px 34px rgba(10,37,64,.10);--shadow2:0 18px 50px rgba(10,37,64,.16);
  --radius:16px;--maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Inter','Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.65;font-size:16px}
img{max-width:100%;display:block;height:auto}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3{color:var(--navy);line-height:1.25;font-weight:800}
h1{font-size:clamp(1.7rem,4vw,2.7rem);letter-spacing:-.5px}
h2{font-size:clamp(1.35rem,2.6vw,1.9rem);margin:0 0 18px}
h3{font-size:1.08rem}
p{margin:0 0 14px}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:#c2410c;margin-bottom:12px}

/* top bar */
.topbar{background:var(--navy);color:#cdd9e8;font-size:.83rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:14px;padding-top:8px;padding-bottom:8px;flex-wrap:wrap}
.topbar a{color:#e8f0fa}
.topbar .tb-r a{margin-left:16px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line);box-shadow:0 2px 14px rgba(10,37,64,.05)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:11px;color:var(--navy);font-weight:800;font-size:1.12rem;line-height:1.15}
.brand:hover{text-decoration:none}
.brand .logo{width:40px;height:40px;border-radius:10px;background:var(--navy);color:var(--orange);display:grid;place-items:center;font-size:1.4rem;font-weight:900;flex:none}
.brand small{display:block;font-weight:600;font-size:.68rem;color:var(--muted);letter-spacing:.4px}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav a{color:var(--ink);font-weight:600;font-size:.92rem;padding:8px 10px;border-radius:9px}
.nav a:hover{background:var(--bg);text-decoration:none}
.nav a.cta{background:#c2410c;color:#fff;padding:9px 16px;margin-left:6px}
.nav a.cta:hover{background:#ef5a1c}
.nav-toggle{display:none}
@media(max-width:920px){.nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 16px 16px;box-shadow:var(--shadow)}
.nav.open{display:flex}.nav a{padding:12px 10px}.nav-toggle{display:inline-flex;background:none;border:1px solid var(--line);border-radius:9px;padding:8px 11px;font-size:1.2rem;cursor:pointer}}

/* breadcrumb */
.crumb{font-size:.82rem;color:var(--muted);padding:14px 0 0}
.crumb a{color:var(--muted)}
.crumb span{margin:0 8px;color:#b3c0d0}

/* hero */
.hero{background:linear-gradient(135deg,#0a2540 0%,#0e3a6b 60%,#124b87 100%);color:#fff;padding:54px 0 60px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(900px 300px at 85% -10%,rgba(255,107,44,.22),transparent 60%);pointer-events:none}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center;position:relative;z-index:1}
.hero h1{color:#fff}
.hero .lead{font-size:1.08rem;color:#dbe7f5;margin:14px 0 22px}
.hero .s{color:#ffd9c7;font-weight:600;font-size:1.02rem;margin-bottom:10px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:11px;font-weight:700;font-size:.97rem;border:1px solid transparent}
.btn:hover{text-decoration:none}
.btn-primary{background:#c2410c;color:#fff}
.btn-primary:hover{background:#ef5a1c}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{border-color:#fff}
.hero-stats{display:flex;gap:26px;margin-top:30px;flex-wrap:wrap}
.hero-stats .num{font-size:1.55rem;font-weight:800;color:#fff;line-height:1}
.hero-stats .lbl{font-size:.76rem;color:#aec3dc;margin-top:5px}
.hero-img{border-radius:14px;overflow:hidden;box-shadow:var(--shadow2);border:1px solid rgba(255,255,255,.15)}
.hero-img img{width:100%;aspect-ratio:4/3;object-fit:cover}
@media(max-width:880px){.hero .wrap{grid-template-columns:1fr;gap:26px}.hero-img{order:-1}}

/* generic sections */
.section{padding:52px 0}
.section.alt{background:var(--bg)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}}
@media(max-width:560px){.grid-3,.grid-4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.alt .card{background:#fff}
.cap{display:flex;gap:12px;align-items:flex-start}
.cap .tick{flex:none;width:26px;height:26px;border-radius:50%;background:#eaf3ff;color:var(--blue);display:grid;place-items:center;font-weight:900;font-size:.85rem}
.cap h3{margin-bottom:4px}
.cap p{margin:0;color:var(--muted);font-size:.92rem}

.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:.87rem;font-weight:600;color:var(--navy)}
.alt .chip{background:#f7faff}
.mat{display:grid;grid-template-columns:1fr 1fr;gap:26px}
@media(max-width:760px){.mat{grid-template-columns:1fr}}

/* products */
.prod{background:#fff;border:1px solid var(--line);border-radius:13px;overflow:hidden;transition:transform .15s,box-shadow .15s}
.prod:hover{transform:translateY(-3px);box-shadow:var(--shadow2)}
.prod .ph{aspect-ratio:4/3;background:linear-gradient(135deg,#e9f1fb,#d4e4f7);display:grid;place-items:center;color:var(--blue);font-weight:700;font-size:.85rem;text-align:center;padding:10px}
.prod img{width:100%;aspect-ratio:4/3;object-fit:cover}
.prod .bd{padding:13px 14px}
.prod h3{font-size:.92rem;margin-bottom:6px}
.prod .tag{font-size:.74rem;font-weight:700;color:#c2410c;text-transform:uppercase;letter-spacing:.4px}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:11px;box-shadow:var(--shadow)}
.faq summary{font-weight:700;color:var(--navy);cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--orange);flex:none;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:11px 0 0;color:var(--muted)}

/* CTA band */
.cta-band{background:linear-gradient(135deg,#0a2540,#124b87);color:#fff;border-radius:20px;padding:42px 40px;text-align:center;box-shadow:var(--shadow2)}
.cta-band h2{color:#fff}
.cta-band p{color:#d5e3f3;max-width:680px;margin:0 auto 22px}
.cta-band .hero-cta{justify-content:center}
.cta-band .btn-ghost{color:#fff}
.contact-line{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:20px;font-size:.95rem;color:#e8f0fa}
.contact-line a{color:#ffd9c7;font-weight:700}

/* related services */
.rel{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}
@media(max-width:900px){.rel{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.rel{grid-template-columns:1fr}}
.rel a{background:#fff;border:1px solid var(--line);border-radius:11px;padding:14px 16px;font-weight:700;color:var(--navy);font-size:.92rem;box-shadow:var(--shadow)}
.rel a:hover{text-decoration:none;border-color:var(--orange);color:var(--orange)}
.rel a.cur{opacity:1;color:var(--navy);font-weight:800;pointer-events:none;cursor:default;border-color:var(--navy)}

/* footer */
.site-footer{background:var(--navy);color:#b9c9dc;padding:48px 0 26px;font-size:.9rem;margin-top:8px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:30px}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}}
.site-footer h2{color:#fff;font-size:.95rem;margin-bottom:14px}
.site-footer a{color:#b9c9dc;display:block;padding:4px 0}
.site-footer a:hover{color:#fff}
.site-footer .brand{color:#fff;margin-bottom:14px}
.site-footer .brand small{color:#9fb4cc}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;font-size:.8rem;color:#8fa6c0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.section-head{max-width:760px;margin-bottom:30px}
.intro{font-size:1.05rem;color:var(--ink)}