*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Arial,"Noto Sans Bengali",sans-serif;color:#0b2d5c;background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
.topbar{background:#062e62;color:#fff;display:flex;gap:34px;align-items:center;padding:11px 6%;font-size:14px;flex-wrap:wrap}
.topbar a{color:#fff}.social{margin-left:auto;font-weight:bold}
.header{height:120px;display:flex;align-items:center;justify-content:space-between;padding:0 7%;background:#fff;box-shadow:0 3px 15px #00000010;position:sticky;top:0;z-index:20}
.brand img{width:310px;max-width:55vw;height:82px;object-fit:contain;object-position:left center}
nav{display:flex;gap:48px;font-weight:700;font-size:17px}
nav a{padding:42px 0;position:relative}nav a:hover,nav a.active{color:#0b75db}
nav a.active:after{content:"";position:absolute;height:4px;background:#0877df;bottom:30px;left:0;right:0;border-radius:5px}
.hero{position:relative;min-height:575px;overflow:hidden;background:#061c39}
.hero-image{width:100%;height:575px;object-fit:cover;display:block}
.hero-overlay{position:absolute;inset:0;display:flex;justify-content:space-between;align-items:center;padding:50px 6%;background:linear-gradient(90deg,rgba(2,20,43,.86) 0%,rgba(2,20,43,.48) 48%,rgba(2,20,43,.05) 100%)}
.hero-copy{max-width:620px;color:#fff}.eyebrow{font-weight:800;font-size:20px}
.hero h1{font-size:58px;line-height:1.05;margin:18px 0}.hero h1 span{color:#08a6ff}
.hero-copy p{font-size:18px;max-width:590px}
.hero-buttons{display:flex;gap:14px;margin-top:25px}.btn{padding:12px 26px;border-radius:30px;font-weight:800}.primary{background:#08a6ff;color:#fff}.light{background:#fff;color:#07356d}
.offer-card{width:360px;background:#062e62eF;color:#fff;border-radius:22px;padding:24px;box-shadow:0 18px 40px #0006;text-align:center;border:2px solid #ffffff33}
.offer-label{display:inline-block;background:#e31616;padding:8px 18px;border-radius:8px;font-weight:900;transform:rotate(-2deg)}
.offer-card h2{font-size:30px;line-height:1.1;margin:18px 0 5px}.offer-card h2 span{color:#ffe600}
.price{font-size:42px;font-weight:900;color:#ffe600}.offer-card small{font-size:14px}
.offer-card ul{list-style:none;text-align:left;margin-top:16px;background:#07396e;padding:13px 16px;border-radius:12px}.offer-card li{margin:5px 0}
.features{display:grid;grid-template-columns:repeat(4,1fr);padding:35px 7%;background:#f5faff;gap:30px}
.features>div{display:grid;grid-template-columns:55px 1fr;column-gap:14px;border-right:1px solid #d7e2ee;padding-right:15px}.features>div:last-child{border:0}
.features b{grid-row:1/3;border:2px solid #0a7fe5;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:#086bd0;font-size:23px}.features h3{font-size:18px}.features p{font-size:14px;color:#526b88}
.section{padding:85px 7%}.section-title{text-align:center;margin-bottom:45px}.section-title span,.section-kicker{color:#0877df;font-weight:800;letter-spacing:1px}.section-title h2,.about h2{font-size:40px;color:#082f60}.section-title p{color:#60748e}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.service-grid article{padding:30px;border:1px solid #e0eaf4;border-radius:18px;box-shadow:0 10px 30px #092f6010;transition:.25s}.service-grid article:hover{transform:translateY(-5px);box-shadow:0 16px 35px #092f6020}.icon{width:55px;height:55px;border-radius:15px;background:#eaf6ff;color:#0877df;display:grid;place-items:center;font-size:25px;margin-bottom:14px}.service-grid h3{font-size:21px}.service-grid p{color:#60748e}.brands{margin-top:45px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.brands span{padding:10px 18px;border-radius:25px;background:#082f60;color:#fff;font-weight:800}
.about{background:#f6faff;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.about-image{border-radius:24px;overflow:hidden;box-shadow:0 18px 45px #092f6030}.about-image img{width:100%;display:block}.about h2{margin:8px 0 20px}.about p{color:#60748e;margin-bottom:14px}.engineer{margin-top:25px;padding:16px 20px;border-left:4px solid #0877df;background:#fff;border-radius:8px}
.contact{background:#fff}.contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.contact-card{padding:25px;border-radius:18px;background:#f4f9ff;border:1px solid #dfeaf5;display:flex;flex-direction:column;gap:7px}.contact-card b{font-size:18px}.contact-card a{color:#0877df;font-weight:700}.contact-card span{color:#5c7089}
footer{background:#062e62;color:#fff;text-align:center;padding:35px}.footer p{font-size:20px}footer p{font-size:21px;font-style:italic;margin-bottom:8px}
@media(max-width:900px){.topbar{justify-content:center;gap:12px;font-size:12px}.social{margin:0}.header{height:85px;padding:0 5%}.brand img{height:65px}nav{gap:18px;font-size:14px}nav a{padding:28px 0}nav a.active:after{bottom:17px}.hero,.hero-image{height:auto;min-height:680px}.hero-image{object-fit:cover}.hero-overlay{flex-direction:column;align-items:flex-start;justify-content:center;gap:25px;padding:35px 6%}.hero h1{font-size:43px}.offer-card{width:min(100%,380px);align-self:center}.features{grid-template-columns:1fr 1fr}.service-grid{grid-template-columns:1fr 1fr}.contact-grid{grid-template-columns:1fr 1fr}.about{grid-template-columns:1fr}}
@media(max-width:600px){.topbar{display:none}.header{height:74px}.brand img{width:220px;height:58px}nav{gap:12px;font-size:12px}nav a{padding:25px 0}.hero,.hero-image{min-height:760px}.hero-overlay{padding:28px 5%}.eyebrow{font-size:15px}.hero h1{font-size:35px}.hero-copy p{font-size:15px}.offer-card h2{font-size:24px}.offer-card{padding:18px}.features{grid-template-columns:1fr;padding:28px 6%}.features>div{border-right:0;border-bottom:1px solid #d7e2ee;padding-bottom:18px}.section{padding:60px 6%}.section-title h2,.about h2{font-size:32px}.service-grid,.contact-grid{grid-template-columns:1fr}.brands span{font-size:13px;padding:8px 12px}}