:root{
  --red:#E60012;
  --red-soft:#ff3b4e;
  --ink:#0d1117;
  --ink-2:#3a4150;
  --muted:#6b7280;
  --bg:#ffffff;
  --bg-alt:#f6f8fb;
  --line:#e6e9ef;
  --radius:16px;
  --max:1160px;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--red);color:#fff;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;transition:.25s;
  box-shadow:0 6px 20px rgba(230,0,18,.25)}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(230,0,18,.35)}
.btn-ghost{background:transparent;color:var(--ink);box-shadow:none;border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink);box-shadow:none}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-lg{padding:16px 34px;font-size:16px}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:.3s;padding:14px 0}
.nav.scrolled{background:rgba(255,255,255,.85);backdrop-filter:blur(12px);
  box-shadow:0 1px 0 var(--line);padding:8px 0}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand img{height:46px;transition:.3s}
.nav.scrolled .brand img{height:38px}
.nav-links{display:flex;gap:30px}
.nav-links a{font-size:15px;color:var(--ink-2);font-weight:500;transition:.2s}
.nav-links a:hover{color:var(--red)}

/* hamburger */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;background:none;border:none;cursor:pointer;padding:9px}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--ink);border-radius:2px;transition:.3s}
.nav.menu-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.menu-open .nav-toggle span:nth-child(2){opacity:0}
.nav.menu-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* hero */
.hero{position:relative;padding:170px 0 110px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(900px 500px at 80% -10%,rgba(230,0,18,.10),transparent 60%),
    radial-gradient(700px 500px at 0% 30%,rgba(20,80,255,.06),transparent 60%),
    linear-gradient(180deg,#fff,#fbfcfe)}
.eyebrow{color:var(--red);font-weight:700;letter-spacing:2px;font-size:14px;margin-bottom:18px}
.hero h1{font-size:clamp(34px,5.5vw,62px);line-height:1.1;font-weight:800;letter-spacing:-1px}
.hero .accent{color:var(--red);position:relative}
.hero-sub{margin:26px 0 36px;font-size:clamp(16px,2vw,19px);color:var(--ink-2);max-width:620px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:48px;margin-top:64px;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{font-size:34px;color:var(--ink);font-weight:800}
.hero-stats span{color:var(--muted);font-size:14px;margin-top:2px}

/* sections */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.tag{display:inline-block;color:var(--red);font-weight:700;font-size:14px;letter-spacing:1px;margin-bottom:14px}
h2{font-size:clamp(26px,3.5vw,40px);font-weight:800;letter-spacing:-.5px;line-height:1.2}
.section-head{text-align:center;max-width:680px;margin:0 auto 56px}

.about-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:60px;align-items:start}
.about-text p{color:var(--ink-2);font-size:17px;margin-bottom:18px}

/* cards */
.cards{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;align-items:stretch}
.card{background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 22px;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(13,17,23,.10);border-color:transparent}
.card-ico{width:50px;height:50px;border-radius:13px;display:grid;place-items:center;
  font-size:24px;background:linear-gradient(135deg,#fff0f1,#ffe2e5);margin-bottom:16px}
.card h3{font-size:18px;font-weight:700;margin-bottom:14px}
.card ul{list-style:none}
.card li{position:relative;padding-left:18px;color:var(--ink-2);font-size:14.5px;margin-bottom:9px}
.card li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;
  border-radius:50%;background:var(--red)}

/* advantage */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv{padding:8px 4px}
.adv-num{font-size:30px;font-weight:800;color:var(--red);opacity:.85}
.adv h4{font-size:18px;font-weight:700;margin:10px 0 8px}
.adv p{color:var(--ink-2);font-size:15px}

/* cta */
.cta{padding:96px 0;background:linear-gradient(135deg,#13151c,#1c1f2b);color:#fff;text-align:center}
.cta h2{color:#fff}
.cta p{color:#aeb4c2;margin:18px auto 32px;max-width:540px;font-size:17px}
.contact-info{display:flex;gap:30px;justify-content:center;flex-wrap:wrap;margin-top:30px;color:#aeb4c2;font-size:15px}
.contact-info span{display:inline-flex;align-items:center;gap:9px}
.contact-info svg{width:18px;height:18px;color:var(--red-soft)}

/* footer */
.footer{padding:40px 0;background:#0d1117;color:#7e8696}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer-logo{height:42px;filter:brightness(0) invert(1);opacity:.9}
.footer p{font-size:14px}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:.6s ease}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media(max-width:1080px){
  .cards{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:900px){
  .cards{grid-template-columns:repeat(3,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:24px}
  .section{padding:72px 0}
  .hero{padding:130px 0 80px}
  .cta-btn{display:none}
  .nav-toggle{display:flex}
  .nav-links{position:fixed;top:0;right:0;height:100vh;width:min(80vw,300px);
    flex-direction:column;gap:6px;background:#fff;padding:96px 28px 28px;
    box-shadow:-8px 0 40px rgba(13,17,23,.12);
    transform:translateX(100%);transition:transform .32s ease;z-index:45}
  .nav.menu-open .nav-links{transform:translateX(0)}
  .nav-links a{font-size:18px;padding:12px 0;border-bottom:1px solid var(--line)}
}
@media(max-width:680px){
  .cards{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
  .cards{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:1fr}
  .hero-stats{gap:32px}
  .hero h1{font-size:32px}
  .footer-inner{flex-direction:column;text-align:center}
  .contact-info{gap:14px}
}