:root{
  --brand:#3f62b9;
  --brand-dark:#2f4d98;
  --brand-deep:#21366f;
  --brand-soft:#eef2ff;
  --ink:#172033;
  --muted:#5c667a;
  --line:#dfe4ee;
  --bg:#ffffff;
  --soft:#f6f8fc;
  --radius:18px;
  --shadow:0 16px 42px rgba(24,34,58,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased;padding-bottom:74px}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{font:inherit}
.container{width:min(1160px,calc(100% - 40px));margin:0 auto}
.skip-link{position:absolute;left:16px;top:-70px;background:#fff;color:var(--brand-deep);padding:10px 14px;border:2px solid var(--brand);border-radius:10px;z-index:999}
.skip-link:focus{top:14px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(223,228,238,.8)}
.navbar{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{font-weight:900;font-size:26px;letter-spacing:-.6px;color:var(--brand-deep)}
.logo span{color:var(--brand)}
.desktop-nav{display:flex;align-items:center;gap:26px;font-weight:700;font-size:14px}
.desktop-nav a:hover{color:var(--brand)}
.nav-cta,.btn-primary{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:var(--brand);color:#fff;font-weight:900;border:0;box-shadow:0 10px 24px rgba(63,98,185,.23);transition:.2s ease}
.nav-cta{padding:11px 18px}
.btn-primary{padding:15px 24px;min-height:52px}
.nav-cta:hover,.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;align-items:center;justify-content:center;cursor:pointer}
.hamburger span,.hamburger span:before,.hamburger span:after{display:block;width:20px;height:2px;background:var(--ink);content:"";position:relative}
.hamburger span:before{position:absolute;top:-6px}.hamburger span:after{position:absolute;top:6px}
.menu-backdrop{display:none;position:fixed;inset:0;background:rgba(20,27,44,.48);z-index:190}
.menu-overlay{position:fixed;right:-330px;top:0;width:min(330px,88vw);height:100vh;background:#fff;z-index:200;padding:26px;transition:right .25s ease;box-shadow:-18px 0 45px rgba(20,27,44,.15)}
.menu-overlay.open{right:0}.menu-backdrop.open{display:block}
.menu-close{width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;font-size:25px;cursor:pointer;float:right}
.mobile-links{clear:both;display:grid;gap:6px;padding-top:36px}
.mobile-links a{padding:13px 4px;font-weight:800;border-bottom:1px solid var(--line)}
.hero{padding:68px 0 54px;background:linear-gradient(135deg,#fff 0%,#f7f9ff 54%,#edf2ff 100%)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:58px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:900;color:var(--brand);background:var(--brand-soft);border:1px solid #dce4ff;padding:8px 12px;border-radius:999px;margin-bottom:18px}
h1{font-size:clamp(40px,5.4vw,70px);line-height:1.02;letter-spacing:-2px;margin-bottom:22px}
.hero-lead{font-size:19px;color:var(--muted);max-width:720px;margin-bottom:24px}
.check-list{display:grid;gap:11px;margin:20px 0 28px;list-style:none}
.check-list li{position:relative;padding-left:30px;font-weight:700}
.check-list li:before{content:"✓";position:absolute;left:0;top:0;color:var(--brand);font-weight:1000}
.offer-row{display:flex;align-items:center;gap:15px;flex-wrap:wrap}
.offer-badge{font-size:14px;font-weight:950;color:var(--brand-deep);background:#fff;border:1px solid #dce4ff;padding:11px 14px;border-radius:13px}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:28px;box-shadow:var(--shadow)}
.hero-float{position:absolute;left:-20px;bottom:24px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:13px 16px;box-shadow:var(--shadow);font-weight:900;color:var(--brand-deep)}
section{padding:78px 0}
.section-soft{background:var(--soft)}
.section-head{max-width:780px;margin:0 auto 38px;text-align:center}
.kicker{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--brand);font-weight:900;margin-bottom:10px}
h2{font-size:clamp(30px,4vw,46px);line-height:1.12;letter-spacing:-1px;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:17px}
.overview-grid{display:grid;grid-template-columns:1fr .9fr;gap:54px;align-items:center}
.overview-copy p{margin-bottom:16px;color:#364055;font-size:16.5px}
.overview-copy p:last-child{margin-bottom:0}
.rounded-img{border-radius:24px;box-shadow:var(--shadow);width:100%;object-fit:cover}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 6px 20px rgba(24,34,58,.05)}
.card .num{width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:950;margin-bottom:16px}
.card h3{font-size:20px;margin-bottom:8px}
.card p{color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{background:linear-gradient(180deg,#fff,#f8faff);border:1px solid var(--line);padding:26px;border-radius:var(--radius)}
.step strong{display:block;color:var(--brand);font-size:12px;letter-spacing:.1em;margin-bottom:7px}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:center}
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.feature{border:1px solid var(--line);border-radius:16px;padding:20px;background:#fff}
.feature h3{font-size:18px;margin-bottom:7px}
.feature p{color:var(--muted);font-size:14.5px}
.hardwater{background:linear-gradient(135deg,var(--brand-deep),var(--brand));color:#fff}
.hardwater .section-head{text-align:left;margin:0}
.hardwater .kicker,.hardwater .section-head p{color:#e8edff}
.hardwater-grid{display:grid;grid-template-columns:1fr .9fr;gap:48px;align-items:center}
.hardwater img{border-radius:24px;box-shadow:0 22px 50px rgba(8,20,50,.25)}
.comparison{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:900px;margin:0 auto}
.comparison .panel{border-radius:20px;padding:28px;border:1px solid var(--line)}
.comparison .panel:first-child{background:#fff}
.comparison .panel:last-child{background:var(--brand-soft);border-color:#d7e1ff}
.comparison h3{font-size:22px;margin-bottom:14px}
.comparison ul{list-style:none;display:grid;gap:10px}
.comparison li{padding-left:25px;position:relative}
.comparison li:before{content:"•";position:absolute;left:7px;color:var(--brand);font-weight:900}
.faq-wrap{max-width:920px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:15px;background:#fff;margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;border:0;background:#fff;padding:19px 21px;font-weight:850;font-size:16px;cursor:pointer;color:var(--ink)}
.faq-q span:last-child{font-size:24px;color:var(--brand);transition:transform .2s ease}
.faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 21px 20px;color:var(--muted)}
.cta-section{padding:80px 0;background:#f5f7fc}
.cta-box{background:linear-gradient(135deg,#21366f,#3f62b9);color:#fff;border-radius:28px;padding:48px;display:grid;grid-template-columns:1fr .78fr;gap:42px;align-items:center;box-shadow:var(--shadow)}
.cta-box p{color:#e9edfb;margin:14px 0 22px}
.cta-box .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:none}
.cta-box img{border-radius:20px}
.site-footer{padding:42px 0 28px;border-top:1px solid var(--line);background:#fff}
.footer-grid{display:flex;align-items:flex-start;justify-content:space-between;gap:30px;flex-wrap:wrap}
.footer-copy{max-width:620px;color:var(--muted);font-size:13px;margin-top:10px}
.footer-links{display:flex;gap:18px;flex-wrap:wrap;font-weight:750;font-size:13px}
.footer-links a:hover{color:var(--brand)}
.bottom-offer{position:fixed;left:0;right:0;bottom:0;z-index:140;background:#172033;color:#fff;border-top:1px solid rgba(255,255,255,.12);box-shadow:0 -8px 30px rgba(16,24,40,.17)}
.offer-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.offer-copy{display:flex;align-items:center;gap:14px}
.offer-copy strong{font-size:16px}
.offer-copy span{font-size:13px;color:#cfd7e6}
.bottom-offer .btn-primary{min-height:44px;padding:10px 19px}
.legal-main{padding:64px 0 80px}
.legal-main .container{max-width:900px}
.legal-main h1{font-size:42px;letter-spacing:-1px}
.legal-main h2{font-size:24px;margin-top:32px}
.legal-main p,.legal-main li{color:#465066;margin-top:10px}
.legal-main ul{padding-left:22px}
@media(max-width:900px){
  .desktop-nav{display:none}.hamburger{display:flex}
  .hero-grid,.overview-grid,.feature-grid,.hardwater-grid,.cta-box{grid-template-columns:1fr}
  .hero{padding-top:42px}.hero-media{order:-1}.hero-float{left:14px}
  .cards,.steps{grid-template-columns:1fr 1fr}
  .hardwater .section-head{text-align:center}
}
@media(max-width:640px){
  .container{width:min(100% - 28px,1160px)}
  body{padding-bottom:82px}
  .navbar{height:64px}.logo{font-size:23px}
  .hero{padding:28px 0 44px}h1{font-size:42px;letter-spacing:-1.3px}
  .hero-lead{font-size:17px}
  section{padding:58px 0}
  .cards,.steps,.feature-list,.comparison{grid-template-columns:1fr}
  .cta-box{padding:30px 22px}
  .offer-inner{height:76px}.offer-copy span{display:none}.offer-copy strong{font-size:14px}
  .bottom-offer .btn-primary{padding:10px 14px;font-size:13px}
}