:root{--bg:#fff;--surface:#f7f9fc;--card:#fff;--line:#e7edf5;--text:#1f2937;--muted:#6b7280;--blue:#2563eb;--blue-soft:#eaf1ff;--green:#15a46d;--shadow:0 10px 30px #1f293712}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.container{width:min(1120px,100% - 32px);margin:0 auto}.site-header{z-index:10;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffffeb;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:20px;min-height:68px;display:flex}.logo{letter-spacing:0;align-items:center;gap:10px;font-size:19px;font-weight:800;display:inline-flex}.logo-mark{background:var(--blue);color:#fff;border-radius:8px;place-items:center;width:34px;height:34px;font-weight:800;display:grid}.nav{color:#374151;align-items:center;gap:6px;font-weight:650;display:flex}.nav a{border-radius:8px;padding:9px 12px}.nav a:hover{background:var(--surface);color:var(--blue)}.hero{padding:58px 0 28px}.hero-grid{grid-template-columns:1.15fr .85fr;align-items:center;gap:34px;display:grid}.eyebrow{background:var(--blue-soft);color:var(--blue);border-radius:999px;align-items:center;gap:8px;margin:0 0 14px;padding:7px 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var(--line);background:var(--card);height:100%;box-shadow:var(--shadow);border-radius:8px;padding:22px;display:block}.card:hover{border-color:#cddbf4;transition:all .18s;transform:translateY(-2px)}.icon{background:var(--blue-soft);width:42px;height:42px;color:var(--blue);border-radius:8px;place-items:center;margin-bottom:14px;font-size:22px;display:grid}.card p,.muted{color:var(--muted)}.button-row{flex-wrap:wrap;gap:10px;margin-top:22px;display:flex}.button{border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:8px;justify-content:center;align-items:center;min-height:46px;padding:0 18px;font-weight:750;display:inline-flex}.button.secondary{color:var(--blue);background:#fff}.page-title{border-bottom:1px solid var(--line);background:linear-gradient(#f8fbff 0%,#fff 100%);padding:46px 0 24px}.page-title h1{font-size:clamp(30px,4vw,44px)}.content-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:22px;display:grid}.calculator{border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;border-radius:8px;padding:24px}.form-grid{grid-template-columns:repeat(2,1fr);gap:14px;display:grid}.field label{color:#4b5563;margin-bottom:7px;font-size:14px;font-weight:700;display:block}.field input,.field select{width:100%;min-height:48px;color:var(--text);background:#fff;border:1px solid #d8e1ee;border-radius:8px;padding:0 12px}.field input:focus,.field select:focus{border-color:var(--blue);outline:3px solid var(--blue-soft)}.result-box{background:#f1f7ff;border-radius:8px;margin-top:18px;padding:20px}.calculator-actions{justify-content:flex-end;margin-top:18px;display:flex}.result-main{color:var(--blue);margin:0;font-size:30px;font-weight:850}.result-list{gap:8px;margin:14px 0 0;padding:0;list-style:none;display:grid}.result-list li{border-top:1px solid #dce9ff;justify-content:space-between;gap:12px;padding-top:8px;display:flex}.info-box,.ad-box{border:1px solid var(--line);background:var(--surface);border-radius:8px;margin-top:18px;padding:20px}.ad-box{color:#8a95a5;text-align:center;border-style:dashed;place-items:center;min-height:120px;display:grid}.side-list{gap:12px;display:grid}.article-card{border:1px solid var(--line);background:#fff;border-radius:8px;padding:18px}.article-meta{color:#64748b;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;font-size:13px;display:flex}.article-meta small{color:var(--blue);font-weight:800}.category-tabs{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:26px;display:grid}.category-tab{border:1px solid var(--line);color:#334155;background:#fff;border-radius:8px;justify-content:space-between;align-items:center;min-height:58px;padding:14px 16px;font-weight:800;display:flex}.category-tab 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