:root{--bg:#f7f9fc;--card:#fff;--ink:#14213d;--muted:#62718a;--line:#e4e9f1;--brand:#126b55;--brand2:#0d9272;--soft:#eef8f5}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
a{color:var(--brand);text-decoration:none}.container{width:min(1120px,92%);margin:auto}.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.nav{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:800;font-size:1.25rem;color:var(--ink)}.brand span{color:var(--brand2)}nav{display:flex;gap:20px;flex-wrap:wrap}nav a{font-size:.94rem;color:#40506a}.hero{padding:82px 0 54px;background:linear-gradient(180deg,#fff, var(--soft));text-align:center}.eyebrow{color:var(--brand);font-weight:700;text-transform:uppercase;font-size:.78rem;letter-spacing:.1em}.hero h1{font-size:clamp(2.2rem,6vw,4.7rem);line-height:1.08;margin:16px auto;max-width:900px}.hero p{max-width:760px;margin:0 auto;color:var(--muted);font-size:1.12rem}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin:30px 0 65px}.card,.article,.tool{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 8px 30px rgba(30,55,80,.05)}.card h2{margin-top:0}.section{padding:60px 0}.section h2{font-size:2rem}.tool h2{margin-top:0}.tools-wrap{display:grid;grid-template-columns:1fr;gap:24px}.field{margin:15px 0}.field label{font-weight:650;font-size:.92rem;display:block;margin-bottom:6px}.field input{width:100%;padding:13px;border:1px solid #ccd5e2;border-radius:10px;font-size:1rem}.result{background:var(--soft);padding:18px;border-radius:12px;margin-top:18px}.result strong{font-size:1.35rem;color:var(--brand)}.content{max-width:860px;margin:auto}.content h1{font-size:2.5rem;line-height:1.2}.content h2{margin-top:2rem}.content p,.content li{color:#45536b}.notice{padding:16px 18px;background:#fff8e6;border-left:4px solid #d69b18;border-radius:8px}.cta{background:var(--ink);color:#fff;border-radius:22px;padding:42px;margin:20px 0 60px}.cta h2{margin-top:0}.cta p{color:#d5ddea}.footer{background:#0f1d34;color:#c8d2df;padding:45px 0;margin-top:50px}.footer a{color:#c8d2df}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.small{font-size:.9rem;color:var(--muted)}button{background:var(--brand);color:white;border:0;border-radius:10px;padding:13px 20px;font-weight:700;cursor:pointer}.calc-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}.calc-tabs button{background:#e8efed;color:#315047}.calc-tabs button.active{background:var(--brand);color:#fff}.calc-panel{display:none}.calc-panel.active{display:block}@media(max-width:800px){.grid,.footer-grid{grid-template-columns:1fr}.nav{padding:12px 0}.hero{padding-top:55px}nav{gap:12px}.card,.article,.tool{padding:22px}}

.brand{display:flex;align-items:center;gap:8px}.brand img{width:40px;height:40px}.brand span{color:var(--ink);font-size:1.35rem}.brand small{color:var(--brand2);font-weight:700;font-size:.72rem;letter-spacing:.02em}.footer-bottom{border-top:1px solid #263650;margin-top:28px;padding-top:20px;font-size:.9rem}