:root{
  --bg:#f4f7fb;
  --surface:#ffffff;
  --surface-2:#eef4ff;
  --text:#142033;
  --muted:#60708a;
  --brand:#1f6fff;
  --brand-2:#0ea5e9;
  --line:#dbe5f1;
  --success:#00a86b;
  --warning:#f59e0b;
  --danger:#e11d48;
  --shadow:0 18px 50px rgba(17,24,39,.08);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:Inter,Arial,sans-serif;background:linear-gradient(180deg,#f8fbff 0%, var(--bg) 100%);
  color:var(--text);line-height:1.55;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.topbar{background:#0f172a;color:#e2e8f0;font-size:14px}
.topbar .container{display:flex;justify-content:space-between;gap:16px;padding:10px 0;flex-wrap:wrap}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:24px}
.brand-badge{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;font-weight:800;box-shadow:var(--shadow)}
.nav-links{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.nav-links a{padding:10px 12px;border-radius:12px;color:var(--muted);font-weight:600}
.nav-links a:hover,.nav-links a.active{background:#edf4ff;color:var(--brand)}
.btn,button{
  border:none;cursor:pointer;border-radius:16px;padding:14px 18px;font-weight:800;
  transition:.2s transform,.2s opacity,.2s background,.2s box-shadow;
}
.btn:hover,button:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 14px 35px rgba(31,111,255,.25)}
.btn-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}
.btn-dark{background:#0f172a;color:#fff}
.hero{padding:60px 0 36px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:30px;align-items:center}
.kicker{display:inline-block;padding:10px 14px;background:#e9f2ff;border:1px solid #cfe0ff;color:var(--brand);font-weight:800;border-radius:999px;font-size:13px;letter-spacing:.02em}
.hero h1{font-size:clamp(36px,6vw,64px);line-height:1.02;margin:18px 0 14px}
.hero p{font-size:18px;color:var(--muted);max-width:720px}
.hero-card{background:linear-gradient(180deg,#fff,#f2f7ff);border:1px solid var(--line);border-radius:32px;box-shadow:var(--shadow);padding:24px}
.hero-stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}
.stat .big{font-size:28px;font-weight:800}
.section{padding:26px 0}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}
.section-title h2{font-size:32px;margin:0}
.section-title p{margin:0;color:var(--muted)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)
}
.card h3{margin:0 0 8px;font-size:20px}
.card p{margin:0;color:var(--muted)}
.card-icon{width:56px;height:56px;border-radius:18px;background:linear-gradient(135deg,#eef5ff,#dbeafe);display:grid;place-items:center;font-size:26px;margin-bottom:16px}
.card:hover{border-color:#c7d8ef}
.feature-list{display:grid;gap:10px;margin-top:16px}
.feature-list span{display:flex;gap:10px;align-items:center;color:#304056}
.feature-list span::before{content:"✓";display:inline-grid;place-items:center;width:24px;height:24px;border-radius:999px;background:#e8fff6;color:var(--success);font-weight:800}
.band{margin:30px 0;background:linear-gradient(135deg,#0f172a,#142b55);color:#fff;border-radius:30px;padding:30px;border:1px solid #20325a}
.band p{color:#dbe7ff}
.ads-grid{display:grid;grid-template-columns:2fr 1fr;gap:18px}
.ad-box{min-height:170px;border-radius:24px;padding:24px;background:linear-gradient(135deg,#eff6ff,#fff);border:1px dashed #9ec5ff}
.mini-posts{display:grid;gap:14px}
.post-link{display:flex;justify-content:space-between;gap:10px;padding:14px 16px;background:#fff;border-radius:16px;border:1px solid var(--line)}
footer{margin-top:40px;padding:40px 0;background:#0f172a;color:#d5deee}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:20px}
.footer-grid h4{margin-top:0;color:#fff}
.footer-grid a{display:block;color:#d5deee;padding:6px 0}
.footer-note{border-top:1px solid #24314b;margin-top:24px;padding-top:20px;color:#a9b7cf;font-size:14px}
.tool-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
.tool-box{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
label{display:block;font-weight:700;margin-bottom:8px}
input,select,textarea{
  width:100%;padding:14px 16px;border-radius:16px;border:1px solid var(--line);background:#fff;font:inherit;color:var(--text)
}
textarea{min-height:130px;resize:vertical}
.result{
  margin-top:18px;padding:18px;border-radius:20px;background:#eef7ff;border:1px solid #cfe2ff
}
.result .value{font-size:34px;font-weight:800}
.notice{font-size:14px;color:var(--muted);margin-top:10px}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;background:#fff;border-radius:20px;overflow:hidden}
th,td{padding:14px;border-bottom:1px solid var(--line);text-align:left}
th{background:#f6faff}
.badge{display:inline-block;border-radius:999px;padding:6px 12px;font-weight:700;font-size:12px}
.badge.ok{background:#e8fff6;color:var(--success)}
.badge.warn{background:#fff8e5;color:#b7791f}
.badge.danger{background:#ffe8ee;color:var(--danger)}
.lights-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.light-card{cursor:pointer;text-align:center}
.light-card .emoji{font-size:40px;margin-bottom:8px}
.modal{position:fixed;inset:0;background:rgba(15,23,42,.72);display:none;align-items:center;justify-content:center;padding:20px;z-index:50}
.modal.open{display:flex}
.modal-box{max-width:700px;width:100%;background:#fff;border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.seo-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.callout{background:#fff8e8;border:1px solid #ffe4a3;border-radius:20px;padding:18px}
.inline-links{display:flex;gap:10px;flex-wrap:wrap}
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{padding:8px 12px;border-radius:999px;background:#eef4ff;border:1px solid #dce9ff;font-weight:700;color:#35528b}
@media (max-width: 960px){
  .hero-grid,.grid-3,.grid-4,.ads-grid,.tool-layout,.footer-grid,.lights-grid,.seo-list{grid-template-columns:1fr}
  .input-grid{grid-template-columns:1fr}
}