:root{
  --blue:#0d67de;
  --blue-dark:#0b2b72;
  --navy:#10255e;
  --green:#12a081;
  --bg:#f7fbff;
  --line:#d8e6f3;
  --text:#13255a;
  --muted:#53627c;
  --shadow:0 12px 30px rgba(11,44,115,.08);
  --container:1180px;
  --radius:18px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Arial,Helvetica,sans-serif;background:#fff;color:var(--text)}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.container{width:min(var(--container), calc(100% - 48px));margin:0 auto}
header.site-header{height:76px;background:#fff;border-bottom:1px solid #edf3fb;position:sticky;top:0;z-index:10}
.site-header .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;white-space:nowrap;font-weight:800;font-size:30px;color:#21a9ef}
.brand img{width:40px;height:40px}
.nav{display:flex;align-items:center;gap:28px;font-size:17px;font-weight:700;color:#1f2e5e}
.nav a{padding:28px 0 22px;border-bottom:4px solid transparent}
.nav .btn-main{padding:0 22px;border-bottom:0;height:52px}
.nav a.btn-main:hover,.nav a.btn-main.active{color:#fff;border-color:transparent}
.nav a.active,.nav a:hover{color:var(--blue);border-color:var(--blue)}
.btn-main,.btn-sub,.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:52px;padding:0 22px;border-radius:10px;border:0;cursor:pointer;font-weight:800;font-size:18px}
.btn-main{background:linear-gradient(180deg,#147df2,#0a5ece);color:#fff;box-shadow:0 12px 24px rgba(13,103,222,.25)}
.btn-sub{background:linear-gradient(180deg,#147df2,#0a5ece);color:#fff;box-shadow:0 12px 24px rgba(13,103,222,.25);width:100%;height:64px;font-size:20px}
.btn-outline{background:#fff;border:1.5px solid #c7dcfb;color:#0d67de;height:46px;font-size:16px}
.hero{background:url('../img/hero-bg.svg') center/cover no-repeat;padding:18px 0 104px}
.hero .container{position:relative}
.hero h1{max-width:690px;font-size:62px;line-height:1.06;letter-spacing:-1.8px;margin:28px 0 18px;font-weight:800;color:#10255e}
.hero p{max-width:670px;font-size:19px;line-height:1.45;color:#2e4066;margin:0}
.main-card-wrap{margin-top:-72px;position:relative;z-index:2}
.main-card{display:grid;grid-template-columns:1.15fr .85fr;background:#fff;border-radius:26px;box-shadow:0 18px 38px rgba(11,44,115,.12);overflow:hidden;border:1px solid rgba(15,70,120,.08)}
.form-pane{padding:34px 38px 28px}
.result-pane{padding:36px 34px;background:linear-gradient(180deg,#f1fcf8,#eaf7f1);border-left:1px solid #edf3ef}
.section-title-small{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:800;color:#17306b;margin:0 0 24px}
.mini-ico{width:34px;height:34px;display:grid;place-items:center;color:#1480ee;flex:0 0 34px}
.mini-ico svg{width:100%;height:100%}
.form-row{display:grid;grid-template-columns:220px 1fr 68px;align-items:center;gap:14px;margin-bottom:14px}
.form-row label{font-weight:700;color:#1f3169;font-size:14px}
.input, .select{width:100%;height:48px;border:1px solid #d4e0ec;border-radius:10px;padding:0 14px;font-size:17px;color:#334567;background:#fff}
.unit{height:48px;border:1px solid #d4e0ec;border-radius:10px;background:#f9fcff;display:grid;place-items:center;color:#56657f;font-weight:700}
.muted-note{margin:-2px 0 18px 234px;font-size:12px;color:#7a869b;font-weight:700}
.button-switches{display:flex;gap:12px;grid-column:2 / span 2}
.switch-btn{height:44px;border-radius:10px;border:1.5px solid #d4e0ec;background:#fff;color:#324267;font-weight:700;padding:0 14px;cursor:pointer}
.switch-btn.active{border-color:#7bb5ff;background:#f3f8ff;color:#0d67de;box-shadow:0 0 0 3px rgba(13,103,222,.08)}
.result-pane h3{font-size:18px;color:#18a285;margin:0 0 12px;font-weight:800}
.result-label{font-size:16px;color:#22335d;font-weight:800;margin-bottom:8px}
.result-main{font-size:76px;line-height:.92;font-weight:800;color:#12a081;letter-spacing:-2px}
.result-sub{font-size:30px;font-weight:800;color:#12a081;line-height:1.05;margin:6px 0 20px}
.info-box{border:1px solid #a5d8cf;background:#fbfffd;border-radius:12px;padding:14px 14px;display:flex;gap:12px;align-items:flex-start;color:#476173;font-size:15px;line-height:1.45}
.bullet-circle{width:28px;height:28px;border-radius:50%;border:2px solid #25aa94;color:#25aa94;display:grid;place-items:center;font-size:16px;font-weight:800;flex:none}
.note-row{display:flex;gap:10px;align-items:flex-start;color:#496172;font-size:15px;line-height:1.55;margin-top:18px}
.note-row strong{display:block;color:#17306b;margin-bottom:4px}
.product-section{padding:26px 0 8px;background:#fff}
.section-title{font-size:28px;font-weight:800;color:#16316d;text-align:center;margin:0 0 10px}
.product-headline{text-align:center;color:#63738f;font-size:16px;line-height:1.55;max-width:880px;margin:0 auto 18px}
.products{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.product-card{background:#fff;border:1px solid #dee9f4;border-radius:16px;box-shadow:var(--shadow);padding:14px;display:flex;flex-direction:column;min-height:360px}
.product-card .pic{height:164px;display:grid;place-items:center;background:linear-gradient(180deg,#f9fbff,#f4f8fc);border-radius:12px;border:1px solid #edf2f7;margin-bottom:10px;padding:8px}
.product-card .pic img{max-height:146px;width:auto}
.badge{display:inline-block;align-self:flex-start;background:#ebf8f2;color:#199d80;font-weight:800;border-radius:999px;padding:6px 10px;font-size:11px;margin-bottom:10px}
.product-card h4{font-size:16px;line-height:1.28;color:#18316c;margin:0 0 8px;min-height:42px}
.product-card p{font-size:13px;line-height:1.48;color:#5e6b83;margin:0 0 12px;flex:1}
.product-price{font-size:22px;color:#17306b;font-weight:800;margin:0 0 10px}
.info-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:18px 0 0}
.info-card{background:#fff;border:1px solid #e2ebf4;border-radius:16px;box-shadow:var(--shadow);padding:20px 20px;display:flex;gap:16px;align-items:flex-start}
.info-icon{width:56px;height:56px;border-radius:50%;background:#1783f2;color:#fff;display:grid;place-items:center;flex:none}
.info-icon svg{width:30px;height:30px}
.info-card h4{margin:0 0 6px;font-size:18px;color:#16316d}
.info-card p{margin:0;color:#5c6b83;line-height:1.45;font-size:14px}
.steps-wrap{padding:26px 0 0}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.step-card{position:relative;background:#fff;border:1px solid #e2ebf4;border-radius:15px;box-shadow:var(--shadow);padding:18px 16px 20px;text-align:center;min-height:180px}
.step-num{position:absolute;left:12px;top:12px;width:28px;height:28px;border-radius:50%;background:#18ab8b;color:#fff;display:grid;place-items:center;font-size:15px;font-weight:800}
.step-icon{width:56px;height:56px;margin:22px auto 14px;color:#0d67de}
.step-icon svg{width:100%;height:100%}
.step-card h4{margin:0 0 8px;font-size:18px;color:#16316d;line-height:1.25}
.step-card p{margin:0;color:#5d6b83;line-height:1.45;font-size:14px}
.step-arrow{position:absolute;right:-18px;top:72px;width:36px;height:16px;color:#9fb6ce;z-index:3}
.step-arrow svg{width:100%;height:100%}
.timing-section{padding:18px 0 0}
.timing-grid{display:grid;grid-template-columns:repeat(3,1fr);background:#f6fbff;border:1px solid #dce8f4;border-radius:16px;overflow:hidden}
.timing-card{padding:18px 20px;display:flex;gap:16px;align-items:flex-start;border-right:1px solid #dce8f4}
.timing-card:last-child{border-right:0}
.timing-icon{width:48px;height:48px;color:#0d67de;flex:none}
.timing-icon svg{width:100%;height:100%}
.timing-card h4{margin:0 0 6px;font-size:18px;color:#16316d}
.timing-card p{margin:0;color:#5c6b83;line-height:1.45;font-size:14px}
.ideal-box{margin-top:18px;position:relative;overflow:hidden;background:linear-gradient(90deg,#e8fbf6,#eefcff);border:1px solid #c8eee5;border-radius:16px;padding:22px 26px;display:flex;align-items:center;gap:18px}
.ideal-box::after{content:'';position:absolute;right:0;bottom:0;width:280px;height:86px;background:url('../img/wave.svg') right bottom/contain no-repeat}
.ideal-icon{width:50px;height:50px;color:#10a082;flex:none}
.ideal-icon svg{width:100%;height:100%}
.ideal-box h4{margin:0 0 5px;font-size:22px;color:#10a082}
.ideal-box p{margin:0;color:#4f6473;font-size:14px}
.faq-section{padding:24px 0 0}
.faq{background:#fff;border:1px solid #dce8f4;border-radius:16px;overflow:hidden}
.faq details{border-bottom:1px solid #dce8f4}
.faq details:last-child{border-bottom:0}
.faq summary{list-style:none;cursor:pointer;padding:15px 18px;font-weight:700;color:#18316c;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-size:26px;line-height:1;color:#0d67de;font-weight:400}
.faq details[open] summary::after{content:'−'}
.faq p{margin:0;padding:0 18px 16px;color:#586780;font-size:14px;line-height:1.55}
.bottom-cta{margin:20px 0 0;background:linear-gradient(90deg,#015fd4,#003d98);border-radius:16px;padding:22px 210px 22px 24px;min-height:112px;display:flex;justify-content:space-between;align-items:center;gap:20px;position:relative;overflow:hidden}
.bottom-cta::after{content:'';position:absolute;right:28px;bottom:-18px;width:118px;height:118px;background:url('../img/ring.svg') center/contain no-repeat}
.bottom-cta h3{font-size:26px;margin:0 0 6px;color:#fff}
.bottom-cta p{margin:0;color:#dcecff;line-height:1.45;font-size:15px}
.bottom-cta .btn-outline{background:#fff;color:#0d67de;border:none;font-weight:800}
.site-footer{margin-top:28px;background:linear-gradient(180deg,#08224a,#06152b);padding:42px 0 16px;color:#d0dff1}
.footer-grid{display:grid;grid-template-columns:1.1fr .8fr .9fr .8fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand img{width:28px;height:28px}
.footer-grid h4{margin:0 0 12px;color:#fff;font-size:18px}
.footer-grid p,.footer-grid li{margin:0;color:#cad8ea;line-height:1.65;font-size:14px}
.footer-grid ul{list-style:none;padding:0;margin:0}
.socials{display:flex;gap:10px;margin-top:16px}
.socials a{width:33px;height:33px;border-radius:50%;background:rgba(255,255,255,.1);display:grid;place-items:center;color:#fff;font-weight:700}
.copy{text-align:center;border-top:1px solid rgba(255,255,255,.08);margin-top:26px;padding-top:14px;font-size:13px;color:#adc1de}
.page-shell{background:#f7fbff;padding:34px 0 52px}
.article{background:#fff;border:1px solid #e1ebf4;border-radius:18px;box-shadow:var(--shadow);padding:30px}
.article h1{margin:0 0 14px;font-size:38px;color:#16316d}
.article h2{font-size:24px;color:#16316d;margin:28px 0 12px}
.article p,.article li{color:#4f607d;line-height:1.7;font-size:16px}
.article ul{padding-left:20px}
@media (max-width: 1180px){
  .hero h1{font-size:54px}
  .products{grid-template-columns:repeat(3,1fr)}
  .main-card{grid-template-columns:1fr}
  .result-pane{border-left:0;border-top:1px solid #edf3ef}
}
@media (max-width: 900px){
  .nav{display:none}
  .hero{padding-bottom:94px}
  .hero h1{font-size:42px;max-width:560px}
  .hero p{font-size:17px}
  .form-row{grid-template-columns:1fr 68px}
  .form-row label{grid-column:1 / -1}
  .button-switches{grid-column:1 / -1}
  .muted-note{margin-left:0}
  .products{grid-template-columns:repeat(2,1fr)}
  .info-grid-3,.steps-grid,.timing-grid,.footer-grid{grid-template-columns:1fr}
  .timing-card{border-right:0;border-bottom:1px solid #dce8f4}
  .timing-card:last-child{border-bottom:0}
  .step-arrow{display:none}
  .bottom-cta{padding:22px 24px 118px}
}
@media (max-width: 560px){
  .container{width:min(var(--container), calc(100% - 28px))}
  header.site-header{height:70px}
  .site-header .container{gap:14px}
  .brand{font-size:22px}
  .brand img{width:32px;height:32px}
  .hero{padding-top:10px;padding-bottom:82px}
  .hero h1{font-size:36px;line-height:1.08;margin-top:18px}
  .main-card-wrap{margin-top:-58px}
  .form-pane,.result-pane{padding:22px 18px}
  .products{grid-template-columns:1fr}
  .bottom-cta h3{font-size:22px}
  .section-title{font-size:24px}
}

.btn-main svg,.btn-sub svg,.btn-outline svg{width:20px;height:20px;flex:none}