:root{
  --brand:#0a6cff; --brand2:#00b4a6; --ink:#1a2230; --muted:#5b6b82;
  --bg:#fff; --bg2:#f4f8fc; --line:#e3ecf6; --card:#fff; --radius:14px;
  --shadow:0 6px 24px rgba(20,60,120,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","Microsoft YaHei","PingFang SC",system-ui,sans-serif;
  color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;background:var(--bg)}
a{color:var(--brand);text-decoration:none}
img,svg{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.btn{display:inline-block;background:var(--brand);color:#fff!important;padding:13px 26px;border-radius:30px;
  font-weight:600;transition:.2s;border:none;cursor:pointer;font-size:15px}
.btn:hover{background:var(--brand2);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--brand)!important;border:2px solid var(--brand)}
.btn-outline:hover{background:var(--brand);color:#fff!important}

/* header */
header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);transition:.3s}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:12px}
.logo{font-weight:800;font-size:20px;color:var(--ink);display:flex;align-items:center;gap:8px;white-space:nowrap}
.logo .plus{color:var(--brand)}
.nav-links{display:flex;gap:22px;align-items:center;list-style:none}
.nav-links a{color:var(--ink);font-weight:500;font-size:15px}
.nav-links a:hover{color:var(--brand)}
.lang-select{padding:6px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px;cursor:pointer;max-width:120px}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{width:26px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* hero */
.hero{min-height:78vh;display:flex;align-items:center;position:relative;overflow:hidden;
  background:radial-gradient(1200px 500px at 80% -10%,rgba(10,108,255,.12),transparent),
  linear-gradient(135deg,#eef5ff 0%,#f0fdfa 100%)}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:60px 0}
.badge{display:inline-block;background:#fff;color:var(--brand);padding:7px 16px;border-radius:30px;
  font-size:14px;font-weight:600;box-shadow:var(--shadow);margin-bottom:22px}
.hero h1{font-size:clamp(32px,5vw,56px);font-weight:850;line-height:1.12;letter-spacing:-.02em}
.hero h1 span{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:var(--muted);margin:22px 0 30px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative;min-height:300px}
.float-card{position:absolute;background:#fff;border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:12px;font-weight:600;animation:float 5s ease-in-out infinite}
.float-card .ic{font-size:28px}
.fc1{top:10px;left:-10px;animation-delay:0s}
.fc2{top:120px;right:-10px;animation-delay:1.2s}
.fc3{bottom:20px;left:20px;animation-delay:2.4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}

/* sections */
section{padding:72px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 44px}
.sec-head .kicker{color:var(--brand);font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:13px}
.sec-head h2{font-size:clamp(26px,3.5vw,40px);font-weight:800;margin:10px 0 12px}
.sec-head p{color:var(--muted);font-size:17px}

/* stats */
.stats{background:var(--bg2)}
.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.stat{background:var(--card);border-radius:var(--radius);padding:28px 18px;text-align:center;box-shadow:var(--shadow)}
.stat .num{font-size:34px;font-weight:850;color:var(--brand)}
.stat .lab{color:var(--muted);font-size:14px;margin-top:6px}

/* products */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--card);border-radius:var(--radius);padding:30px 26px;border:1px solid var(--line);
  box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column;height:100%}
.card:hover{transform:translateY(-6px);border-color:var(--brand)}
.card .emoji{font-size:44px;margin-bottom:14px}
.card h3{font-size:22px;margin-bottom:10px}
.card p{color:var(--muted);margin-bottom:16px;flex:1}
.card ul{list-style:none;margin-bottom:18px}
.card li{position:relative;padding-left:22px;margin-bottom:7px;color:var(--ink);font-size:15px}
.card li::before{content:"✓";position:absolute;left:0;color:var(--brand2);font-weight:800}
.card .more{font-weight:700;color:var(--brand)}

/* why */
.why{background:var(--bg2)}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.why-item{background:var(--card);border-radius:var(--radius);padding:28px 22px;box-shadow:var(--shadow);text-align:center}
.why-item .ic{font-size:38px;margin-bottom:12px}
.why-item h4{font-size:18px;margin-bottom:8px}
.why-item p{color:var(--muted);font-size:15px}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-copy h2{font-size:clamp(26px,3.5vw,38px);font-weight:800;margin-bottom:16px}
.about-copy p{color:var(--muted);margin-bottom:20px;font-size:16px}
.about-list{list-style:none;margin-bottom:26px}
.about-list li{padding:10px 0 10px 36px;position:relative;border-bottom:1px solid var(--line);font-size:16px}
.about-list li::before{content:counter(ab,decimal) ".";counter-increment:ab;position:absolute;left:0;color:var(--brand);font-weight:800}
.about-list{counter-reset:ab}
.about-visual{background:linear-gradient(135deg,var(--brand),var(--brand2));border-radius:var(--radius);
  padding:44px 30px;color:#fff;min-height:300px;display:flex;flex-direction:column;justify-content:center}
.about-visual h3{font-size:26px;margin-bottom:14px}
.about-visual .big{font-size:52px;font-weight:850;margin:auto 0}

/* CTA strip */
.cta-strip{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;text-align:center;padding:60px 20px;border-radius:var(--radius);margin:0 20px}
.cta-strip h2{font-size:clamp(24px,3vw,34px);margin-bottom:12px}
.cta-strip p{opacity:.95;margin-bottom:24px;font-size:17px}
.cta-strip .btn{background:#fff;color:var(--brand)!important}
.cta-strip .btn:hover{background:#f0f4ff}

/* contact */
.contact{background:var(--bg2)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.contact-info{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.info-box{background:var(--card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.info-box .ic{font-size:28px;margin-bottom:8px}
.info-box h4{font-size:15px;color:var(--muted);font-weight:600}
.info-box p,a{font-size:16px;font-weight:600;word-break:break-all}
.contact-form{background:var(--card);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.contact-form .row{margin-bottom:16px}
.contact-form label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.contact-form input,.contact-form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit}
.contact-form textarea{min-height:120px;resize:vertical}
.contact-form .btn{width:100%}

/* footer */
footer{background:#0f1b2d;color:#c7d2e6;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:32px;margin-bottom:36px}
.footer-grid h4{color:#fff;font-size:16px;margin-bottom:14px}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:9px}
.footer-grid a{color:#c7d2e6;font-size:15px}
.footer-grid a:hover{color:#fff}
.footer-brand p{color:#8fa0bc;margin:14px 0;font-size:15px}
.footer-bottom{border-top:1px solid #24344c;padding-top:22px;text-align:center;font-size:14px;color:#8fa0bc}
.footer-bottom a{color:#8fa0bc}

/* mobile */
@media (max-width:900px){
  .nav-links{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:24px;gap:16px;
    box-shadow:0 12px 30px rgba(0,0,0,.1);transform:translateY(-150%);transition:.35s;align-items:flex-start}
  .nav-links.open{transform:translateY(0)}
  .nav-toggle{display:flex}
  .lang-select{max-width:none;width:100%}
  .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
  .hero-visual{min-height:220px}
  .float-card{position:relative;margin:8px 0;left:0!important;right:0!important;top:0!important;bottom:0!important;animation:none}
  .stats-grid,.why-grid{grid-template-columns:1fr 1fr}
  .prod-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-info{grid-template-columns:1fr}
  .info-box p,a{font-size:15px}
  section{padding:52px 0}
}
@media (max-width:520px){
  .stats-grid,.why-grid,.footer-grid{grid-template-columns:1fr}
  .hero-cta .btn{flex:1;text-align:center}
}