*{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue:#2563eb;
  --blue-dark:#1d4ed8;
  --dark:#111827;
  --text:#1f2937;
  --muted:#6b7280;
  --line:#e5e7eb;
  --soft:#f6f8fb;
  --white:#ffffff;
}
html{scroll-behavior:smooth}
body{
  font-family:Arial,Helvetica,sans-serif;
  background:var(--soft);
  color:var(--text);
  line-height:1.7;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:auto;padding:0 20px}
.header{
  background:#fff;
  border-bottom:1px solid var(--line);
  position:sticky;
  top:0;
  z-index:20;
  box-shadow:0 4px 18px rgba(0,0,0,.04);
}
.nav{
  height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.logo{
  font-size:24px;
  font-weight:800;
  color:var(--blue);
  letter-spacing:.2px;
}
.menu{display:flex;gap:22px;font-weight:700;color:#374151}
.menu a:hover,.menu a.active{color:var(--blue)}
.mobile-btn{display:none;background:var(--blue);color:#fff;border:0;border-radius:10px;padding:10px 14px;font-weight:800}
.hero{
  padding:78px 0;
  background:linear-gradient(135deg,#eaf2ff,#ffffff);
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:42px;
  align-items:center;
}
.badge{
  display:inline-block;
  background:#dbeafe;
  color:#1d4ed8;
  padding:7px 14px;
  border-radius:999px;
  font-size:13px;
  font-weight:800;
  margin-bottom:18px;
}
.hero h1{
  font-size:50px;
  line-height:1.14;
  color:#111827;
  margin-bottom:18px;
}
.hero p{
  font-size:18px;
  color:#4b5563;
  margin-bottom:28px;
}
.btn{
  display:inline-block;
  background:var(--blue);
  color:#fff;
  padding:14px 24px;
  border-radius:12px;
  font-weight:800;
  box-shadow:0 12px 24px rgba(37,99,235,.22);
}
.btn.light{
  background:#fff;
  color:var(--blue);
  border:1px solid #bfdbfe;
  margin-left:10px;
}
.hero-img{
  border-radius:28px;
  overflow:hidden;
  box-shadow:0 22px 50px rgba(15,23,42,.18);
}
.section{padding:66px 0}
.section.white{background:#fff}
.section-title{text-align:center;max-width:760px;margin:0 auto 36px}
.section-title h2{font-size:34px;color:#111827;margin-bottom:10px}
.section-title p{color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  background:#fff;
  padding:28px;
  border-radius:20px;
  border:1px solid var(--line);
  box-shadow:0 10px 28px rgba(0,0,0,.05);
}
.card h3{font-size:22px;margin-bottom:10px;color:var(--blue-dark)}
.card p{color:#4b5563}
.article-wrap{
  max-width:900px;
  margin:auto;
  background:#fff;
  padding:36px;
  border-radius:24px;
  border:1px solid var(--line);
  box-shadow:0 10px 28px rgba(0,0,0,.05);
}
.article-wrap h1,.article-wrap h2{color:#111827;margin-bottom:16px}
.article-wrap p{margin-bottom:17px;color:#374151}
.article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.article-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  overflow:hidden;
  box-shadow:0 10px 28px rgba(0,0,0,.05);
}
.article-card div{padding:22px}
.article-card h3{font-size:21px;color:#111827;margin-bottom:8px}
.article-card p{color:#4b5563;margin-bottom:14px}
.faq-list{max-width:900px;margin:auto}
.faq-item{
  background:#fff;
  margin-bottom:16px;
  padding:22px;
  border-radius:18px;
  border:1px solid var(--line);
}
.faq-item h3{font-size:19px;color:#111827;margin-bottom:7px}
.form{
  max-width:760px;
  margin:auto;
  background:#fff;
  padding:30px;
  border-radius:22px;
  border:1px solid var(--line);
  box-shadow:0 10px 28px rgba(0,0,0,.05);
}
.form label{display:block;font-weight:800;margin-bottom:6px}
.form input,.form textarea{
  width:100%;
  padding:14px;
  border:1px solid #d1d5db;
  border-radius:12px;
  margin-bottom:16px;
  font-size:15px;
}
.form button{border:0;cursor:pointer}
.page-hero{
  padding:54px 0;
  background:linear-gradient(135deg,#eaf2ff,#fff);
  text-align:center;
}
.page-hero h1{font-size:42px;color:#111827;margin-bottom:10px}
.page-hero p{color:#4b5563;max-width:720px;margin:auto}
.footer{
  background:#111827;
  color:#d1d5db;
  padding:42px 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr;
  gap:30px;
}
.footer h3{color:#fff;margin-bottom:10px}
.footer a{display:block;margin-bottom:8px;color:#d1d5db}
.copy{text-align:center;margin-top:28px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
@media(max-width:900px){
  .hero-grid,.cards,.article-list,.footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:36px}
  .page-hero h1{font-size:34px}
  .menu{display:none;position:absolute;left:0;right:0;top:76px;background:#fff;flex-direction:column;padding:18px 20px;border-bottom:1px solid var(--line)}
  .menu.show{display:flex}
  .mobile-btn{display:block}
  .btn.light{margin-left:0;margin-top:10px}
}