*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;color:#333;line-height:1.6}
html{scroll-behavior:smooth}
a{text-decoration:none;color:inherit;transition:color .3s}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Top Bar */
.top-bar{background:#0d1b2a;padding:8px 0;font-size:12px;color:#8892b0}
.top-bar .container{display:flex;justify-content:space-between;align-items:center}
.top-bar a{color:#8892b0;margin-left:12px}
.top-bar a:hover{color:#64ffda}

/* Header */
header{background:#1b263b;position:sticky;top:0;z-index:999;box-shadow:0 2px 20px rgba(0,0,0,.3)}
header .container{display:flex;justify-content:space-between;align-items:center;height:72px}
.logo{font-size:26px;font-weight:800;color:#fff;letter-spacing:-1px}
.logo span{color:#64ffda}

/* Navigation */
.main-nav{display:flex;gap:0}
.main-nav>li{position:relative}
.main-nav>li>a{display:block;padding:26px 22px;color:#ccd6f6;font-size:14px;font-weight:500}
.main-nav>li:hover>a{color:#64ffda;background:rgba(100,255,218,.05)}
.sub-menu{display:none;position:absolute;top:100%;left:0;background:#fff;min-width:230px;
border-radius:0 0 8px 8px;box-shadow:0 12px 40px rgba(0,0,0,.15);overflow:hidden;z-index:100}
.main-nav>li:hover .sub-menu{display:block}
.sub-menu li a{display:block;padding:13px 22px;color:#333;font-size:13px;
border-bottom:1px solid #f1f1f1;transition:all .3s}
.sub-menu li a:hover{background:#64ffda;color:#0d1b2a;padding-left:28px}
.sub-menu li:last-child a{border-bottom:none}

/* Hero */
.hero{background:linear-gradient(135deg,#0d1b2a 0%,#1b263b 40%,#415a77 100%);
padding:120px 0 100px;color:#fff;position:relative;overflow:hidden}
.hero::after{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;
background:radial-gradient(circle,rgba(100,255,218,.08) 0%,transparent 70%);border-radius:50%}
.hero h1{font-size:50px;font-weight:800;margin-bottom:20px;line-height:1.2}
.hero h1 span{color:#64ffda}
.hero p{font-size:18px;color:#8892b0;max-width:600px;margin-bottom:40px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}

/* Buttons */
.btn{padding:14px 34px;border-radius:6px;font-size:14px;font-weight:600;
transition:all .3s;display:inline-block}
.btn-primary{background:#64ffda;color:#0d1b2a}
.btn-primary:hover{background:#a8ffea;transform:translateY(-2px);
box-shadow:0 8px 25px rgba(100,255,218,.3)}
.btn-ghost{border:2px solid #64ffda;color:#64ffda}
.btn-ghost:hover{background:#64ffda;color:#0d1b2a}

/* Sections */
.section{padding:90px 0}
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:34px;font-weight:700;color:#1b263b;margin-bottom:12px}
.section-header p{color:#666;font-size:16px;max-width:600px;margin:0 auto}
.bg-light{background:#f7f9fc}

/* Page Header */
.page-header{background:linear-gradient(135deg,#0d1b2a,#1b263b,#415a77);
padding:80px 0 60px;color:#fff;text-align:center}
.page-header h1{font-size:40px;font-weight:800;margin-bottom:12px}
.page-header p{color:#8892b0;font-size:16px}

/* Cards */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{background:#fff;border-radius:12px;padding:40px 28px;border:1px solid #eee;
transition:all .3s;text-align:center}
.card:hover{transform:translateY(-6px);box-shadow:0 20px 50px rgba(0,0,0,.08);border-color:#64ffda}
.card-icon{width:60px;height:60px;background:linear-gradient(135deg,#64ffda,#0d1b2a);
border-radius:12px;display:flex;align-items:center;justify-content:center;
font-size:26px;color:#fff;margin:0 auto 20px}
.card h3{font-size:18px;color:#1b263b;margin-bottom:10px}
.card p{font-size:14px;color:#666;line-height:1.7;margin-bottom:14px}
.card-link{color:#64ffda;font-size:13px;font-weight:600}
.card-link:hover{color:#0d1b2a}

/* Tech Cards */
.tech-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.tech-card{background:#fff;border:1px solid #eee;border-radius:10px;padding:28px 20px;
text-align:center;transition:all .3s}
.tech-card:hover{border-color:#64ffda;box-shadow:0 8px 24px rgba(100,255,218,.1)}
.tech-card h4{font-size:15px;color:#1b263b;margin-bottom:6px}
.tech-card p{font-size:12px;color:#888}

/* Sub-sections for detail pages */
.sub-section{padding:70px 0;border-bottom:1px solid #eee}
.sub-section:last-child{border-bottom:none}
.sub-section h3{font-size:26px;font-weight:700;color:#1b263b;margin-bottom:16px}
.sub-section p{color:#555;font-size:15px;line-height:1.8;margin-bottom:14px;max-width:800px}
.highlight-box{background:#f0fdf9;border-left:4px solid #64ffda;padding:20px 24px;
border-radius:0 8px 8px 0;margin:20px 0}
.highlight-box p{margin:0;color:#1b263b}
.sub-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-top:30px}
.sub-grid-img{background:linear-gradient(135deg,#1b263b,#415a77);border-radius:12px;
height:260px;display:flex;align-items:center;justify-content:center;font-size:56px;color:#64ffda}
.feature-list{margin-top:16px}
.feature-list li{padding:8px 0 8px 24px;position:relative;color:#444;font-size:14px}
.feature-list li::before{content:"\2713";position:absolute;left:0;color:#64ffda;font-weight:700}

/* Tech detail */
.tech-detail-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}

/* Case detail */
.case-detail{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-top:24px}
.case-visual{border-radius:12px;height:240px;display:flex;align-items:center;
justify-content:center;font-size:56px;color:#fff}
.case-text h4{font-size:20px;color:#1b263b;margin-bottom:10px}
.case-text p{font-size:14px;color:#666;line-height:1.7;margin-bottom:10px}
.case-badge{display:inline-block;background:#e8fdf5;color:#0d1b2a;padding:4px 14px;
border-radius:20px;font-size:12px;font-weight:600}

/* CTA */
.cta-section{background:linear-gradient(135deg,#1b263b,#415a77);padding:80px 0;color:#fff}
.cta-section h2{font-size:30px;margin-bottom:14px}
.cta-section p{color:#8892b0;font-size:16px}

/* Contact */
.contact-section{padding:90px 0}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px}
.contact-info h3{font-size:26px;color:#1b263b;margin-bottom:16px}
.contact-info>p{color:#666;margin-bottom:25px}
.c-item{display:flex;align-items:center;gap:14px;margin-bottom:20px;color:#444;font-size:14px}
.c-item .c-icon{width:42px;height:42px;background:rgba(100,255,218,.15);border-radius:50%;
display:flex;align-items:center;justify-content:center;color:#1b263b;font-size:16px}
.contact-form input,.contact-form textarea{width:100%;padding:14px 18px;margin-bottom:14px;
background:#f7f9fc;border:1px solid #ddd;border-radius:8px;color:#333;font-size:14px;
outline:none;font-family:inherit}
.contact-form input:focus,.contact-form textarea:focus{border-color:#64ffda}
.contact-form textarea{height:120px;resize:vertical}
.contact-form button{background:#64ffda;color:#0d1b2a;border:none;padding:14px 36px;
border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:all .3s}
.contact-form button:hover{background:#a8ffea;transform:translateY(-2px)}
.map-placeholder{background:#f0f0f0;border-radius:12px;height:100%;min-height:300px;
display:flex;align-items:center;justify-content:center;color:#888;font-size:14px;border:1px solid #eee}

/* Stats */
.stats{background:#fff;padding:50px 0;border-bottom:1px solid #e6e6e6}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.stats-grid h3{font-size:40px;font-weight:800;color:#1b263b}
.stats-grid p{font-size:13px;color:#666;margin-top:5px;text-transform:uppercase;letter-spacing:1px}

/* Footer */
footer{background:#0a1628;padding:50px 0 30px;color:#8892b0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col p{font-size:13px;line-height:1.8}
.footer-col a{display:block;font-size:13px;color:#8892b0;margin-bottom:8px}
.footer-col a:hover{color:#64ffda}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;
text-align:center;font-size:12px;color:#556}

/* Responsive */
@media(max-width:992px){
.cards-grid{grid-template-columns:repeat(2,1fr)}
.sub-grid,.case-detail{grid-template-columns:1fr}
.tech-row,.tech-detail-row{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.main-nav{display:none}
.hero h1{font-size:32px}
.page-header h1{font-size:28px}
.stats-grid{grid-template-columns:repeat(2,1fr)}
.cards-grid,.tech-row,.tech-detail-row{grid-template-columns:1fr}
.contact-grid,.footer-grid{grid-template-columns:1fr}
}