:root{
  --bg:#08111f;--card:#0f1b2d;--border:#1e2f47;--text:#e6edf7;--muted:#8ea3bf;
  --accent:#4f8cff;--good:#34d399;--warn:#f59e0b;--danger:#f87171;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--text);line-height:1.6;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif}
a{color:var(--accent);text-decoration:none}
.site-header{position:sticky;top:0;z-index:10;background:rgba(8,17,31,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.nav-shell{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.brand{display:flex;flex-direction:column;line-height:1.25;color:var(--text)}
.brand strong{font-size:18px}
.brand small{color:var(--muted);font-size:12px}
.tool-nav{display:flex;gap:4px;flex-wrap:wrap}
.tool-nav a{color:var(--muted);padding:6px 12px;border-radius:8px;font-size:14px}
.tool-nav a:hover{color:var(--text);background:rgba(79,140,255,.12)}
.tool-nav a.active{color:var(--text);background:rgba(79,140,255,.18)}
main{max-width:1080px;margin:0 auto;padding:0 20px 48px}
.hero{padding:48px 0 8px}
.hero .eyebrow{color:var(--accent);font-size:13px;letter-spacing:2px;margin-bottom:8px}
.hero h1{font-size:32px;margin-bottom:12px}
.hero p{color:var(--muted);max-width:760px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px;margin-top:24px}
.card h2{font-size:20px;margin-bottom:16px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.field input,.field select{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:#0a1626;color:var(--text);font-size:15px}
.field input:focus,.field select:focus{outline:2px solid var(--accent);outline-offset:1px}
.radio-row{display:flex;gap:20px;align-items:center;padding-top:6px}
.radio-row label{display:flex;gap:6px;align-items:center;font-size:15px}
.submit-button{margin-top:20px;padding:12px 28px;border:0;border-radius:10px;background:var(--accent);color:#fff;font-size:16px;cursor:pointer}
.submit-button:hover{filter:brightness(1.1)}
.secondary-button{padding:7px 14px;border:1px solid var(--border);border-radius:8px;background:transparent;color:var(--text);cursor:pointer;font-size:14px}
.secondary-button:hover{background:rgba(79,140,255,.12)}
.message{padding:12px 16px;border-radius:8px;margin-top:16px;font-size:14px}
.error-message{background:rgba(248,113,113,.12);color:var(--danger);border:1px solid rgba(248,113,113,.4)}
.note-message{background:rgba(142,163,191,.1);color:var(--muted);border:1px solid var(--border)}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-top:4px}
.result-card{background:#0a1626;border:1px solid var(--border);border-radius:12px;padding:18px}
.result-card h3{font-size:15px;margin-bottom:8px}
.result-card .value{font-size:28px;font-weight:700;margin:4px 0}
.result-card .range{color:var(--muted);font-size:14px}
.result-card .desc{color:var(--muted);font-size:13px;margin-top:8px}
.badge{display:inline-block;font-size:12px;color:#08111f;background:var(--good);border-radius:6px;padding:1px 8px;margin-left:8px;vertical-align:middle}
.alerts{margin-top:16px}
.alerts li{color:var(--warn);margin-left:20px}
.profile-toolbar{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.profile-toolbar select{min-width:180px;padding:9px 12px;border-radius:8px;border:1px solid var(--border);background:#0a1626;color:var(--text);font-size:15px}
.table-wrap{overflow-x:auto;margin-top:16px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:8px 10px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}
th{color:var(--muted);font-weight:500}
.muted{color:var(--muted)}
#growth-chart{width:100%;height:420px}
.about{color:var(--muted);font-size:13px}
.about h3{color:var(--text);font-size:15px;margin:12px 0 6px}
.about ul{margin-left:20px}
footer{border-top:1px solid var(--border);margin-top:32px;padding:20px;text-align:center;color:var(--muted);font-size:13px}
@media (max-width:640px){
  .hero h1{font-size:26px}
  .card{padding:18px}
  #growth-chart{height:320px}
}