:root{--navy:#0a0f1d;--navy2:#1a2236;--cyan:#0cc0de;--cyan-d:#067f94;--bg:#f4f6f9;--line:#d5dbe4;--text:#161c2b;--muted:#4d586d;--white:#fff}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.6 "Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif}
a{color:var(--cyan-d)}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
header{background:var(--navy);color:var(--white)}
.top{display:flex;justify-content:space-between;align-items:center;padding:16px 0;gap:12px;flex-wrap:wrap}
.top a{color:var(--white);text-decoration:none;font-weight:700}
.top .back{font-weight:400;color:#c4cde0;font-size:15px}
.top .back:hover{color:var(--white)}
.hero{padding:36px 0 56px}
h1{font-size:clamp(30px,6vw,48px);line-height:1.12;margin:0 0 16px;font-weight:800;letter-spacing:-.01em}
.hero p{max-width:640px;margin:0;font-size:19px;color:#d7deee}
.hero b{color:var(--cyan)}
h2{font-size:clamp(23px,4vw,30px);line-height:1.2;margin:0 0 16px}
section{padding:48px 0 0}
.calc{background:var(--white);border:1px solid var(--line);border-radius:6px;margin-top:-32px;position:relative}
fieldset{border:0;margin:0;padding:22px 20px;border-bottom:1px solid var(--line)}
legend{font-weight:700;font-size:18px;padding:0;margin-bottom:10px}
.opt{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:4px;margin-bottom:8px;cursor:pointer;background:var(--white)}
.opt:hover{border-color:var(--cyan-d)}
.opt input{margin-top:6px;accent-color:var(--cyan-d);width:18px;height:18px;flex:none}
.opt:has(input:checked){border-color:var(--cyan-d);background:#eefafd}
.opt:has(input:focus-visible){outline:3px solid var(--cyan-d);outline-offset:2px}
.opt span{flex:1}
.opt small{display:block;color:var(--muted);font-size:15px;line-height:1.4}
.opt .price{flex:none;font-weight:700;white-space:nowrap}
fieldset[disabled]{opacity:.45}
fieldset[disabled] .opt{cursor:not-allowed}
.result{padding:22px 20px;background:var(--navy);color:var(--white);border-radius:0 0 5px 5px}
.result .row{display:flex;justify-content:space-between;gap:16px;align-items:baseline;flex-wrap:wrap;padding:6px 0}
.result .row+.row{border-top:1px solid var(--navy2)}
.result .lbl{color:#c4cde0}
.result .num{font-size:clamp(24px,5vw,34px);font-weight:800;color:var(--cyan)}
.result .note{color:#c4cde0;font-size:15px;margin:10px 0 0}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-block;padding:13px 22px;border-radius:4px;font-weight:700;text-decoration:none;font-size:17px;border:2px solid var(--cyan)}
.btn.main{background:var(--cyan);color:var(--navy)}
.btn.main:hover{background:#38d4ee;border-color:#38d4ee}
.btn.alt{background:transparent;color:var(--white)}
.btn.alt:hover{background:var(--navy2)}
.btn:focus-visible{outline:3px solid var(--white);outline-offset:2px}
table{width:100%;border-collapse:collapse;background:var(--white);border:1px solid var(--line)}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#e9edf3;font-size:15px}
td.p{white-space:nowrap;font-weight:700}
.tw{overflow-x:auto}
ul.plain{padding-left:22px;margin:0}
ul.plain li{margin-bottom:6px}
ol{padding-left:24px;margin:0}
ol li{margin-bottom:8px}
details{background:var(--white);border:1px solid var(--line);border-radius:4px;margin-bottom:8px}
summary{cursor:pointer;padding:14px 16px;font-weight:700;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";float:right;font-weight:400;font-size:22px;line-height:1}
details[open] summary::after{content:"−"}
details p{margin:0;padding:0 16px 16px;color:var(--muted)}
.cta{margin-top:48px;background:var(--navy);color:var(--white);padding:40px 0}
.cta h2{color:var(--white)}
.cta p{color:#d7deee;max-width:620px;margin:0 0 6px}
footer{background:var(--navy);color:#a9b4cb;font-size:15px;padding:18px 0 28px;border-top:1px solid var(--navy2)}
footer a{color:#d7deee}
@media(max-width:560px){body{font-size:16px}.opt{flex-wrap:wrap}.opt .price{width:100%;padding-left:30px}}
.top nav{display:flex;gap:4px 18px;flex-wrap:wrap;align-items:center}
.top nav a{font-weight:400;font-size:15px;color:#c4cde0;padding:6px 0}
.top nav a:hover,.top nav a[aria-current=page]{color:var(--white)}
.top nav a[aria-current=page]{border-bottom:2px solid var(--cyan)}
.top .brand{font-size:17px}
.hero.sub{padding:22px 0 44px}
.hero.sub h1{font-size:clamp(26px,5vw,40px)}
.hero.sub p{max-width:720px}
.crumbs{margin:0 0 12px!important;font-size:14px!important;color:#a9b4cb!important}
.crumbs a{color:#c4cde0}
main.wrap{padding-bottom:8px}
.article{max-width:760px;padding-top:28px}
.article p,.article li{max-width:70ch}
.article h2{margin:34px 0 12px}
.article h3{font-size:20px;margin:24px 0 8px}
.article ul,.article ol{padding-left:24px;margin:0 0 16px}
.article li{margin-bottom:6px}
.article table{margin:18px 0}
.meta{color:var(--muted);font-size:15px;margin:0 0 18px}
.note{background:#eefafd;border:1px solid #b8e6ef;border-radius:4px;padding:12px 16px;margin:22px 0;font-size:16px}
.box{background:var(--white);border:1px solid var(--line);border-left:4px solid var(--cyan-d);border-radius:4px;padding:16px 18px;margin:30px 0}
.box p{margin:6px 0 0}
.btn.small{font-size:15px;padding:8px 16px;margin-left:6px;color:var(--navy)}
.related ul{list-style:none;padding:0;margin:0}
.related li{padding:10px 0;border-bottom:1px solid var(--line)}
.related small{display:block;color:var(--muted)}
.author{color:var(--muted);font-size:15px;margin-top:28px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}
.card{display:block;background:var(--white);border:1px solid var(--line);border-radius:4px;padding:16px;text-decoration:none;color:var(--text)}
.card:hover{border-color:var(--cyan-d)}
.card b{display:block;margin-bottom:6px;color:var(--navy)}
.card span{display:block;color:var(--muted);font-size:15px;line-height:1.45}
.card:focus-visible,.top nav a:focus-visible,.related a:focus-visible{outline:3px solid var(--cyan-d);outline-offset:2px}
.more{margin-top:16px}
.fcols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:16px;line-height:1.9}
.fcols b{color:var(--white)}
.gloss dt{font-weight:700;margin-top:18px;font-size:18px}
.gloss dd{margin:4px 0 0;color:var(--muted)}
table td small{color:var(--muted)}
.tw table{min-width:640px;font-size:15px}
@media(max-width:560px){.top{padding:12px 0}.btn.small{margin:8px 0 0}}