*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#1e40af;--primary-light:#3b82f6;--accent:#60a5fa;--bg-dark:#0a0f1e;--bg-card:#111827;--text:#e2e8f0;--text-muted:#94a3b8;--border:#1e293b}
html{scroll-behavior:smooth}
body{font-family:'PingFang SC','Microsoft YaHei',Helvetica,Arial,sans-serif;background:var(--bg-dark);color:var(--text);line-height:1.7;overflow-x:hidden}
nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,15,30,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:0 5%}
nav .inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-size:22px;font-weight:800;color:#fff;letter-spacing:-.5px;text-decoration:none}
.logo span{color:#60a5fa}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{color:var(--text-muted);text-decoration:none;font-size:14px;transition:color .3s}
.nav-links a:hover{color:#fff}
.nav-btns{display:flex;gap:10px}
.btn-nav{padding:8px 18px;border-radius:8px;font-size:13px;font-weight:600;text-decoration:none;transition:all .3s}
.btn-nav-outline{border:1px solid var(--primary-light);color:var(--primary-light)}
.btn-nav-outline:hover{background:var(--primary-light);color:#fff}
.btn-nav-primary{background:var(--primary-light);color:#fff}
.btn-nav-primary:hover{background:#2563eb}
@media(max-width:768px){.nav-links{display:none}}
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding:0 5%}
.hero-bg{position:absolute;inset:0;background:url("../img/tech-bg.jpg") center/cover no-repeat}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,15,30,.85) 0%,rgba(30,64,175,.4) 100%)}
.hero-particles{position:absolute;inset:0;overflow:hidden}
.particle{position:absolute;width:3px;height:3px;background:#60a5fa;border-radius:50%;animation:float 6s infinite}
@keyframes float{0%,100%{transform:translateY(0) translateX(0);opacity:.4}50%{transform:translateY(-120px) translateX(40px);opacity:1}}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;width:100%;padding:120px 0 80px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:8px;background:rgba(96,165,250,.12);border:1px solid rgba(96,165,250,.3);padding:6px 14px;border-radius:50px;font-size:12px;color:#93c5fd;margin-bottom:24px}
.badge-dot{width:6px;height:6px;background:#3b82f6;border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero-title{font-size:52px;font-weight:800;line-height:1.15;color:#fff;margin-bottom:20px;letter-spacing:-1px}
.hero-title span{background:linear-gradient(135deg,#60a5fa,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:17px;color:var(--text-muted);margin-bottom:36px;line-height:1.8}
.hero-stats{display:flex;gap:40px;margin-bottom:40px}
.stat{text-align:center}
.stat-num{font-size:26px;font-weight:800;color:#fff}
.stat-label{font-size:12px;color:var(--text-muted);margin-top:4px}
.hero-img{text-align:center;position:relative}
.hero-img img{max-width:380px;width:100%;border-radius:16px;box-shadow:0 40px 80px rgba(59,130,246,.3)}
.hero-glow{position:absolute;width:300px;height:300px;background:radial-gradient(circle,rgba(59,130,246,.25) 0%,transparent 70%);top:50%;left:50%;transform:translate(-50%,-50%)}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:12px;font-size:15px;font-weight:700;text-decoration:none;transition:all .3s;border:none;cursor:pointer}
.btn-register{background:linear-gradient(135deg,#1d4ed8,#2563eb);color:#fff;box-shadow:0 8px 30px rgba(37,99,235,.4)}
.btn-register:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(37,99,235,.5)}
.btn-download{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.2)}
.btn-download:hover{background:rgba(255,255,255,.15);transform:translateY(-2px)}
section{padding:100px 5%}
.section-header{text-align:center;max-width:680px;margin:0 auto 60px}
.section-label{font-size:12px;font-weight:700;color:var(--primary-light);text-transform:uppercase;letter-spacing:3px;margin-bottom:12px}
.section-title{font-size:38px;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:-.5px}
.section-desc{font-size:16px;color:var(--text-muted);line-height:1.8}
.features-section{background:linear-gradient(180deg,var(--bg-dark) 0%,#0d1424 100%)}
.features-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:36px 28px;transition:all .4s}
.feature-card:hover{border-color:var(--primary-light);transform:translateY(-6px);box-shadow:0 20px 50px rgba(37,99,235,.15)}
.feature-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:20px}
.fi-blue{background:rgba(59,130,246,.15);color:#60a5fa}
.fi-purple{background:rgba(139,92,246,.15);color:#a78bfa}
.fi-green{background:rgba(16,185,129,.15);color:#34d399}
.fi-orange{background:rgba(251,146,60,.15);color:#fb923c}
.fi-cyan{background:rgba(34,211,238,.15);color:#22d3ee}
.fi-pink{background:rgba(236,72,153,.15);color:#f472b6}
.feature-title{font-size:18px;font-weight:700;color:#fff;margin-bottom:10px}
.feature-desc{font-size:14px;color:var(--text-muted);line-height:1.7}
.products-section{background:var(--bg-dark)}
.products-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{background:linear-gradient(145deg,#111827,#0f172a);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:all .4s}
.product-card:hover{border-color:#1e40af;transform:translateY(-4px)}
.product-banner{height:160px;display:flex;align-items:center;justify-content:center;font-size:60px;background:linear-gradient(135deg,rgba(30,64,175,.2),rgba(59,130,246,.1))}
.product-body{padding:28px}
.product-tag{display:inline-block;padding:3px 10px;border-radius:6px;font-size:11px;font-weight:700;text-transform:uppercase;margin-bottom:12px}
.tag-blue{background:rgba(59,130,246,.15);color:#93c5fd}
.tag-purple{background:rgba(139,92,246,.15);color:#c4b5fd}
.tag-green{background:rgba(16,185,129,.15);color:#6ee7b7}
.tag-orange{background:rgba(249,115,22,.15);color:#fdba74}
.tag-cyan{background:rgba(34,211,238,.15);color:#a5f3fc}
.tag-pink{background:rgba(236,72,153,.15);color:#f9a8d4}
.product-title{font-size:20px;font-weight:700;color:#fff;margin-bottom:10px}
.product-desc{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:16px}
.product-features{list-style:none;display:flex;flex-direction:column;gap:8px}
.product-features li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted)}
.product-features li::before{content:'✓';color:var(--primary-light);font-weight:700}
.security-section{background:linear-gradient(180deg,#0d1424 0%,var(--bg-dark) 100%)}
.security-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.security-title{font-size:36px;font-weight:800;color:#fff;margin-bottom:20px}
.security-title span{color:var(--primary-light)}
.security-desc{font-size:15px;color:var(--text-muted);line-height:1.8;margin-bottom:32px}
.security-list{display:flex;flex-direction:column;gap:16px;margin-bottom:32px}
.sec-item{display:flex;gap:16px;align-items:flex-start}
.sec-icon{width:40px;height:40px;border-radius:10px;background:rgba(59,130,246,.15);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#60a5fa;font-size:18px}
.sec-text h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:4px}
.sec-text p{font-size:13px;color:var(--text-muted)}
.security-img img{max-width:460px;width:100%;border-radius:20px;box-shadow:0 30px 70px rgba(0,0,0,.4)}
.about-section{background:var(--bg-dark);padding:80px 5%}
.about-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.about-card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:32px 24px;text-align:center;transition:all .3s}
.about-card:hover{border-color:var(--primary-light);transform:translateY(-4px)}
.about-num{font-size:40px;font-weight:800;background:linear-gradient(135deg,#60a5fa,#3b82f6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}
.about-label{font-size:14px;color:var(--text-muted)}
.about-desc{font-size:13px;color:var(--text-muted);margin-top:8px;line-height:1.6}
.cta-section{background:linear-gradient(135deg,#1e3a8a 0%,#1e40af 50%,#1d4ed8 100%);padding:100px 5%;text-align:center;position:relative;overflow:hidden}
.cta-title{font-size:44px;font-weight:800;color:#fff;margin-bottom:16px;position:relative}
.cta-desc{font-size:17px;color:rgba(255,255,255,.8);margin-bottom:40px;position:relative}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative}
.btn-white{background:#fff;color:var(--primary);padding:16px 36px;border-radius:12px;font-size:16px;font-weight:700;text-decoration:none;transition:all .3s}
.btn-white:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(0,0,0,.2)}
.btn-outline-white{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.4);padding:16px 36px;border-radius:12px;font-size:16px;font-weight:700;text-decoration:none;transition:all .3s}
.btn-outline-white:hover{border-color:#fff;background:rgba(255,255,255,.1)}
footer{background:#060b16;border-top:1px solid var(--border);padding:60px 5% 30px}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--border)}
.footer-logo{font-size:22px;font-weight:800;color:#fff;margin-bottom:16px}
.footer-logo span{color:var(--primary-light)}
.footer-desc{font-size:14px;color:var(--text-muted);line-height:1.7}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;text-transform:uppercase;letter-spacing:1px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--text-muted);text-decoration:none;font-size:13px;transition:color .3s}
.footer-col a:hover{color:#fff}
.footer-bottom{padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-copy{font-size:13px;color:var(--text-muted)}
.footer-socials{display:flex;gap:16px}
.footer-social{width:36px;height:36px;border-radius:10px;background:var(--bg-card);display:flex;align-items:center;justify-content:center;color:var(--text-muted);text-decoration:none;transition:all .3s;font-size:16px}
.footer-social:hover{background:var(--primary-light);color:#fff}
@media(max-width:1024px){
.hero-content{grid-template-columns:1fr;text-align:center;padding-top:100px}
.hero-text{order:2}
.hero-img{order:1}
.hero-stats{justify-content:center}
.hero-btns{justify-content:center}
.features-grid,.products-grid{grid-template-columns:repeat(2,1fr)}
.security-grid{grid-template-columns:1fr}
.security-img{order:-1;text-align:center}
.about-inner{grid-template-columns:repeat(2,1fr)}
.footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
.hero-title{font-size:34px}
.section-title{font-size:28px}
.hero-stats{gap:24px;flex-wrap:wrap}
.features-grid,.products-grid{grid-template-columns:1fr}
.about-inner{grid-template-columns:1fr 1fr}
.footer-top{grid-template-columns:1fr}
.cta-title{font-size:30px}
.hero-btns{flex-direction:column;align-items:center}
}