:root{
  --primary:#0B1F3A;
  --primary2:#16345F;
  --secondary:#2EC5CE;
  --success:#34C759;
  --warning:#F5A623;
  --danger:#E85D75;
  --bg:#F4F7FA;
  --card:#FFFFFF;
  --text:#102033;
  --muted:#667085;
  --line:#E5E7EB;
  --dark:#111827;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
}
a{color:var(--secondary);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(1180px,92%);margin:auto}
.site-header{
  background:linear-gradient(135deg,var(--primary),var(--primary2));
  color:#fff;
  position:sticky;
  top:0;
  z-index:10;
  box-shadow:0 8px 24px rgba(0,0,0,.14);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:18px 0;
}
.logo{
  font-size:28px;
  font-weight:900;
  color:#fff;
}
.logo span{color:var(--secondary)}
.menu{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.menu a{
  color:#fff;
  font-weight:700;
  font-size:14px;
}
.hero{
  background:
    radial-gradient(circle at 20% 20%,rgba(46,197,206,.28),transparent 30%),
    linear-gradient(135deg,var(--primary),var(--primary2));
  color:#fff;
  padding:82px 0 70px;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.25fr .75fr;
  gap:36px;
  align-items:center;
}
.eyebrow{
  color:#BEEAF0;
  font-weight:900;
  letter-spacing:.08em;
  text-transform:uppercase;
  font-size:13px;
}
.hero h1{
  font-size:clamp(38px,7vw,72px);
  line-height:1.02;
  margin:12px 0 18px;
}
.hero p{
  font-size:20px;
  color:#EAF7FA;
  max-width:760px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{
  display:inline-block;
  padding:15px 20px;
  border-radius:14px;
  font-weight:900;
  border:0;
  cursor:pointer;
  text-decoration:none!important;
}
.btn-primary{background:var(--secondary);color:#fff}
.btn-success{background:var(--success);color:#fff}
.btn-warning{background:var(--warning);color:#132032}
.btn-danger{background:var(--danger);color:#fff}
.btn-soft{background:#E8F1F5;color:var(--primary)}
.hero-card,.card,.article,.tool-box,.notice{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:24px;
  box-shadow:0 14px 42px rgba(16,32,51,.10);
}
.hero-card{
  padding:26px;
  background:rgba(255,255,255,.96);
  color:var(--text);
}
.hero-card h2{color:var(--primary);margin-top:0}
.hero-card li{margin:10px 0}
.section{padding:62px 0}
.section-title{
  font-size:36px;
  margin:0 0 10px;
  color:var(--primary);
}
.section-subtitle{
  color:var(--muted);
  max-width:780px;
  margin:0 0 26px;
}
.grid{
  display:grid;
  gap:20px;
}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  padding:24px;
}
.card h3{color:var(--primary);margin-top:0}
.card p{color:var(--muted)}
.card .tag{
  display:inline-block;
  padding:6px 10px;
  background:#E8F1F5;
  color:var(--primary);
  border-radius:999px;
  font-size:12px;
  font-weight:900;
  margin-bottom:10px;
}
.notice{
  padding:22px;
  background:#FFF8E6;
  border-left:7px solid var(--warning);
}
.recovery-panel{
  background:linear-gradient(135deg,#ffffff,#eefafd);
  border-radius:28px;
  padding:30px;
  border:1px solid var(--line);
}
.steps{
  display:grid;
  gap:12px;
  margin-top:20px;
}
.step{
  display:flex;
  gap:12px;
  align-items:flex-start;
  background:#fff;
  border:1px solid var(--line);
  padding:15px;
  border-radius:18px;
}
.step-num{
  background:var(--secondary);
  color:#fff;
  width:30px;
  height:30px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-weight:900;
  flex:0 0 30px;
}
.article{
  padding:36px;
}
.article h1{
  color:var(--primary);
  font-size:clamp(34px,5vw,54px);
  line-height:1.08;
}
.article h2{color:var(--primary);margin-top:34px}
.article li{margin:8px 0}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:26px;
  padding:54px 0;
}
.sidebar{
  position:sticky;
  top:92px;
  align-self:start;
}
.sidebar .card{margin-bottom:18px}
.tool-box{
  padding:26px;
}
input,textarea,select{
  width:100%;
  padding:14px 16px;
  border:1px solid var(--line);
  border-radius:14px;
  font-size:16px;
  margin:8px 0 12px;
}
.result{
  background:#F8FAFC;
  padding:16px;
  border-radius:16px;
  margin-top:14px;
  border:1px solid var(--line);
}
.good{color:var(--success);font-weight:900}
.warn{color:var(--warning);font-weight:900}
.bad{color:var(--danger);font-weight:900}
.footer{
  background:var(--dark);
  color:#fff;
  padding:44px 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr;
  gap:26px;
}
.footer a{display:block;color:#BEEAF0;margin:7px 0}
.small{font-size:14px;color:#9CA3AF}
@media(max-width:900px){
  .hero-grid,.article-layout,.footer-grid{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .nav{align-items:flex-start;flex-direction:column}
  .hero{padding:54px 0}
  .sidebar{position:static}
}