:root{
  --bg1:#050a12;
  --bg2:#061426;
  --card: rgba(255,255,255,.06);
  --stroke: rgba(255,255,255,.10);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.62);
  --brand1:#2f7bff;
  --brand2:#35c7ff;
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --radius: 18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 15% 10%, rgba(47,123,255,.22), transparent 60%),
    radial-gradient(900px 500px at 80% 15%, rgba(53,199,255,.18), transparent 55%),
    linear-gradient(180deg, var(--bg2), var(--bg1) 55%, #04070c);
}

.ai-header{
  position:sticky; top:0; z-index:10;
  backdrop-filter: blur(14px);
  background: rgba(4,10,18,.55);
  border-bottom: 1px solid var(--stroke);
}

.ai-header-inner{
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.ai-logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  letter-spacing:.2px;
}
.ai-badge{
  font-size:12px;
  padding:4px 10px;
  border:1px solid var(--stroke);
  background: rgba(255,255,255,.06);
  border-radius: 999px;
  color: var(--muted);
}

.ai-nav a{
  color: var(--muted);
  text-decoration:none;
  margin-left: 14px;
  font-weight: 600;
}
.ai-nav a:hover{color:var(--text)}
.ai-nav a.active{color:var(--text)}

.container{
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 18px 48px;
}

.hero{
  padding: 18px 0 10px;
}
.h-title{
  font-size: 44px;
  line-height: 1.05;
  margin: 0 0 10px;
}
.h-sub{
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  max-width: 760px;
}

.grid{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
  margin-top: 22px;
}
@media (max-width: 920px){
  .grid{grid-template-columns: 1fr}
  .h-title{font-size: 34px}
}

.card{
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.card-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-bottom: 12px;
}
.card-title h3{
  margin:0;
  font-size: 16px;
  letter-spacing:.2px;
}
.kpi{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
.kpi span{
  font-size: 12px;
  color: var(--muted);
  padding: 6px 10px;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  background: rgba(255,255,255,.05);
}

.form{
  display:grid;
  gap: 12px;
}
label{
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
  display:block;
}
input, select{
  width:100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(0,0,0,.25);
  color: var(--text);
  outline: none;
}
input:focus, select:focus{
  border-color: rgba(53,199,255,.45);
  box-shadow: 0 0 0 4px rgba(53,199,255,.10);
}

.row2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 560px){
  .row2{grid-template-columns:1fr}
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  border:0;
  border-radius: 14px;
  padding: 12px 14px;
  cursor:pointer;
  font-weight: 800;
  color: white;
  background: linear-gradient(90deg, var(--brand1), var(--brand2));
}
.btn:hover{filter: brightness(1.05)}
.btn:active{transform: translateY(1px)}

.result{
  display:grid;
  gap: 12px;
}
.big{
  font-size: 34px;
  font-weight: 900;
  margin: 0;
}
.muted{color: var(--muted); margin:0}
.hr{
  height:1px;
  background: rgba(255,255,255,.10);
  margin: 8px 0;
  border:0;
}
.notice{
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
}

.ai-footer{
  max-width:1180px;
  margin: 24px auto 0;
  padding: 18px;
  color: var(--muted);
  font-size: 12px;
  text-align:center;
}