:root{--ink:#0f2036;--teal:#2dd4bf;--mut:#5b6b82;--bg:#f7f9fc;--card:#fff;--line:#e2e8f0}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
a{color:#0e7490}
.wrap{max-width:1060px;margin:0 auto;padding:0 20px}
header.site{background:var(--ink);color:#fff}
header.site .wrap{display:flex;justify-content:space-between;align-items:center;padding:16px 20px}
.logo{font-weight:800;font-size:20px;color:#fff;text-decoration:none}
.logo span{color:var(--teal)}
nav a{color:#cbd5e1;text-decoration:none;margin-left:20px;font-size:15px}
nav a:hover{color:#fff}
.hero{background:var(--ink);color:#fff;padding:56px 0 64px}
.hero h1{font-size:42px;line-height:1.15;max-width:720px}
.hero p{color:#cbd5e1;font-size:18px;max-width:640px;margin-top:14px}
.btn{display:inline-block;background:var(--teal);color:#06251f;font-weight:700;padding:12px 22px;border-radius:10px;text-decoration:none;margin-top:22px}
.btn.ghost{background:transparent;color:#fff;border:1px solid #475569;margin-left:10px}
section{padding:44px 0}
h2{font-size:28px;margin-bottom:8px}
.sub{color:var(--mut);margin-bottom:24px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.card h3{font-size:19px;margin-bottom:6px}
.card p{color:var(--mut);font-size:15px}
.card a{font-weight:600;text-decoration:none}
.tag{display:inline-block;font-size:12px;font-weight:700;color:#0e7490;background:#ecfeff;border:1px solid #a5f3fc;padding:2px 8px;border-radius:999px;margin-bottom:10px}
.tool{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px;max-width:680px}
label{display:block;font-weight:600;font-size:14px;margin:14px 0 6px}
input,select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:9px;font-size:16px}
button.calc{background:var(--ink);color:#fff;border:0;padding:12px 20px;border-radius:10px;font-weight:700;font-size:16px;margin-top:18px;cursor:pointer}
.result{margin-top:20px;background:#f0fdfa;border:1px solid #99f6e4;border-radius:10px;padding:16px;display:none}
.result b{font-size:20px}
article.post{max-width:760px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:34px}
article.post h1{font-size:32px;line-height:1.25;margin-bottom:10px}
article.post h2{font-size:23px;margin:26px 0 8px}
article.post p,article.post li{color:#24344d}
article.post ul{margin:8px 0 8px 22px}
.meta{color:var(--mut);font-size:14px;margin-bottom:18px}
.cta{background:var(--ink);color:#fff;border-radius:14px;padding:28px;margin-top:30px}
.cta p{color:#cbd5e1}
footer{padding:30px 0;color:var(--mut);font-size:14px;border-top:1px solid var(--line);margin-top:20px}
.price{font-size:22px;font-weight:800}
table{width:100%;border-collapse:collapse;font-size:15px}
td,th{border:1px solid var(--line);padding:8px 10px;text-align:left}
@media(max-width:640px){.hero h1{font-size:32px}nav a{margin-left:12px}}