:root{
  --bg:#eef3fb; --card:#fff; --primary:#2f80ed; --text:#162847; --muted:#697b98; --border:#d7e1f1;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:10;background:#fff;border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:20px}
.brand{display:flex;align-items:center;gap:12px}
.brand-icon{width:42px;height:42px;border-radius:14px;background:#4a98f1;color:#fff;display:grid;place-items:center;font-weight:700}
.brand-text strong{display:block;font-size:18px}
.brand-text span{display:block;font-size:14px;color:var(--muted)}
.menu{display:flex;gap:28px;font-weight:700;color:#546784}
.theme-btn{width:40px;height:40px;border:1px solid var(--border);border-radius:14px;background:#f9fbff;cursor:pointer;font-size:18px}
.hero{padding:56px 0 40px}
.hero-grid{display:grid;grid-template-columns:1.2fr .65fr;gap:34px;align-items:start}
.eyebrow{color:#0d6efd;font-size:14px;font-weight:800;letter-spacing:.04em;margin:0 0 14px}
.hero h1{margin:0 0 20px;font-size:68px;line-height:1.05;max-width:820px}
.hero-desc{color:var(--muted);font-size:18px;line-height:1.7;max-width:760px;margin:0 0 26px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.btn{padding:16px 26px;border-radius:16px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border)}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-secondary{background:#fff;color:var(--text)}
.tags{display:flex;gap:12px;flex-wrap:wrap}
.tags span{border:1px solid var(--border);border-radius:999px;padding:10px 16px;background:#f7faff;color:#6a7d99}
.ad-card{background:#fff;border:1px solid var(--border);border-radius:30px;padding:22px;margin-top:70px}
.ad-title{margin:0 0 18px;color:#0d6efd;font-weight:700;font-size:16px}
.ad-box{min-height:330px;border:1px solid #cfdcf1;border-radius:28px;background:#eaf1fb;display:grid;place-items:center;color:#6a7d99;font-size:18px}
.featured{padding:26px 0 30px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:26px}
.section-head h2{font-size:52px;margin:0}
.section-note{color:var(--muted);max-width:500px;font-size:16px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tool-card{background:#fff;border:1px solid var(--border);border-radius:26px;padding:24px;min-height:260px;transition:.18s ease;box-shadow:0 2px 0 rgba(0,0,0,.02)}
.tool-card:hover{transform:translateY(-3px);border-color:#b7cae7}
.tool-badge{width:54px;height:54px;border-radius:18px;background:#4a98f1;color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:28px}
.tool-card h3{margin:0 0 12px;font-size:22px}
.tool-card p{margin:0;color:var(--muted);line-height:1.6}
.seo-block{padding:18px 0 60px}
.seo-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.seo-card{background:#fff;border:1px solid var(--border);border-radius:26px;padding:24px}
.seo-card h3{margin:0 0 12px;font-size:24px}
.seo-card p{margin:0;color:var(--muted);line-height:1.7}
.tool-hero{background:#0d6efd;color:#fff;padding:34px 0}
.tool-hero h1{margin:0 0 10px;font-size:48px}
.tool-wrap{padding:32px 0 60px}
.tool-layout{display:grid;grid-template-columns:1.1fr .55fr;gap:22px}
.panel{background:#fff;border:1px solid var(--border);border-radius:26px;padding:22px}
.drop{border:2px dashed #bcd0ef;border-radius:24px;padding:40px;text-align:center;background:#f8fbff}
.result-note{padding:16px;border:1px solid #ead29a;border-radius:16px;background:#fff8e8;color:#8b6a17}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}
@media (max-width:1200px){.hero h1{font-size:58px}.cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:900px){.hero-grid,.seo-grid,.section-head,.tool-layout{grid-template-columns:1fr;display:grid}.hero h1{font-size:44px}.ad-card{margin-top:0}.menu{display:none}.tool-hero h1{font-size:34px}}
@media (max-width:640px){.container{width:min(100% - 24px,1180px)}.hero h1{font-size:34px}.section-head h2{font-size:34px}.cards{grid-template-columns:1fr}}