:root{--navy:#0e2a47;--navy2:#123a63;--ink:#1c2733;--mut:#5a6b7d;--line:#dbe4ee;--bg:#f4f7fb;--acc:#0f766e;--card:#ffffff}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65;font-size:17px}
a{color:var(--navy2);text-decoration:underline}
header.site{position:sticky;top:0;background:var(--navy);z-index:20;box-shadow:0 1px 6px rgba(0,0,0,.18)}
header.site .wrap{display:flex;align-items:center;gap:14px;padding:10px 18px;max-width:1060px;margin:0 auto}
.logo{color:#fff;font-weight:800;font-size:19px;text-decoration:none;letter-spacing:.2px}
.logo span{color:#7dd3c8}
header.site nav{margin-left:auto;display:flex;gap:16px;flex-wrap:wrap}
header.site nav a{color:#dce8f5;text-decoration:none;font-size:14.5px}
header.site nav a:hover{color:#fff;text-decoration:underline}
.hero{background:linear-gradient(180deg,var(--navy) 0%,var(--navy2) 100%);color:#fff;padding:38px 18px 30px}
.hero .wrap{max-width:1060px;margin:0 auto}
.hero h1{font-size:32px;line-height:1.22;margin:0 0 10px;font-weight:800}
.hero p.sub{color:#cfe0f2;font-size:17.5px;margin:0 0 18px;max-width:760px}
.answercard{background:#fff;color:var(--ink);border-radius:12px;padding:18px 20px;max-width:820px;box-shadow:0 6px 24px rgba(0,0,0,.22)}
.answercard .big{font-size:21px;font-weight:800;color:var(--navy)}
.answercard p{margin:6px 0 0;color:var(--mut);font-size:15.5px}
.btn{display:inline-block;background:var(--acc);color:#fff;padding:11px 20px;border-radius:8px;font-weight:700;text-decoration:none;margin-top:14px}
.btn:hover{background:#0b5f57}
main{max-width:1060px;margin:0 auto;padding:26px 18px 10px}
h2{font-size:24px;color:var(--navy);border-bottom:3px solid var(--acc);display:inline-block;padding-bottom:3px;margin:30px 0 12px}
h3{font-size:19px;color:var(--navy2);margin:22px 0 8px}
p{margin:10px 0}
.tblwrap{overflow-x:auto;margin:14px 0;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;font-size:15.5px;min-width:560px}
th{background:var(--navy);color:#fff;text-align:left;padding:10px 12px;font-weight:700}
td{padding:9px 12px;border-top:1px solid var(--line);vertical-align:top}
tr:nth-child(even) td{background:var(--bg)}
td.num,th.num{text-align:right;white-space:nowrap}
.src{color:var(--mut);font-size:13.5px;margin:6px 0 14px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:16px 0}
.card{border:1px solid var(--line);border-radius:10px;padding:14px 16px;background:var(--card)}
.card a{font-weight:700;font-size:17px;text-decoration:none}
.card a:hover{text-decoration:underline}
.card p{margin:6px 0 0;color:var(--mut);font-size:14.5px}
.card .price{color:var(--acc);font-weight:800}
.faq{border:1px solid var(--line);border-radius:10px;padding:4px 16px;margin:10px 0;background:#fff}
.faq h3{margin:12px 0 4px;font-size:17px}
.faq p{margin:0 0 12px}
.note{background:#eef6f5;border-left:4px solid var(--acc);padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0}
footer.site{background:var(--navy);color:#cfe0f2;margin-top:44px;padding:26px 18px}
footer.site .wrap{max-width:1060px;margin:0 auto;font-size:14.5px}
footer.site a{color:#fff}
footer.site nav{display:flex;gap:14px;flex-wrap:wrap;margin:10px 0}
.crumbs{font-size:13.5px;color:var(--mut);margin:0 0 6px}
.crumbs a{color:var(--mut)}
/* calculator */
.calc{border:2px solid var(--navy);border-radius:12px;padding:18px;background:var(--bg);margin:18px 0}
.calc h3{margin-top:0}
.calc label{display:block;font-weight:700;font-size:15px;margin:12px 0 4px;color:var(--navy)}
.calc select{width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;font-size:16px;background:#fff}
.feats{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:6px 14px;margin-top:6px}
.feats label{font-weight:400;display:flex;gap:8px;align-items:flex-start;margin:2px 0;font-size:15.5px;color:var(--ink)}
.feats input{margin-top:5px}
.calcgrid{display:grid;grid-template-columns:1fr 1fr;gap:0 26px}
@media(max-width:760px){.calcgrid{grid-template-columns:1fr}.hero h1{font-size:26px}}
#calc-result{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin-top:18px}
#calc-result .total{font-size:26px;font-weight:800;color:var(--navy)}
#calc-result table{min-width:0}
/* visual layer: logo mark, hero art, topic + card + feature icons */
.logo{display:inline-flex;align-items:center;gap:8px}
.logo .logo-ic{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:7px;background:var(--acc);color:#fff}
.logo .logo-ic svg{width:15px;height:15px}
.hero-flex{display:flex;gap:30px;align-items:center}
.hero-main{flex:1 1 auto;min-width:0}
.hero-art{flex:0 0 330px;max-width:330px}
.hero-art-svg{width:100%;height:auto;display:block}
@media(max-width:820px){.hero-art{display:none}}
.topic-ic{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:14px;background:var(--acc);color:#fff;margin:2px 0 12px;box-shadow:0 4px 14px rgba(0,0,0,.25)}
.topic-ic svg{width:28px;height:28px}
.card-ic{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:11px;background:#e6f4f2;color:var(--acc);margin-bottom:9px}
.card-ic svg{width:25px;height:25px}
.feat-ic{display:inline-flex;color:var(--acc);vertical-align:-4px}
.feat-ic svg{width:17px;height:17px}
/* ===== Design v2 (owner order 12 Nov 2026): clean professional layer ===== */
.hero-flex{display:block}
.hero{padding:44px 18px 36px}
.hero h1{font-size:34px;max-width:820px}
.hero p.sub{font-size:18px}
.answercard{border-top:4px solid var(--acc);max-width:860px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:22px;max-width:1060px}
.stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:10px;padding:13px 15px}
.stat .n{font-size:19px;font-weight:800;color:#fff;line-height:1.25}
.stat .t{font-size:13px;color:#b9cee6;margin-top:2px}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr)}.hero h1{font-size:27px}}
.card{display:flex;flex-direction:column;align-items:flex-start;transition:box-shadow .15s ease,border-color .15s ease}
.card:hover{box-shadow:0 6px 18px rgba(14,42,71,.10);border-color:#b9cee6}
.card-ic{display:flex;margin-bottom:11px}
.card .price{font-size:16.5px;margin-top:3px}
.calc{background:#fff;border:1px solid var(--line);border-top:4px solid var(--navy);border-radius:12px;box-shadow:0 8px 26px rgba(14,42,71,.08);padding:22px}
.calc select{border-color:#b9cee6}
.calc select:focus{outline:2px solid var(--acc);outline-offset:1px}
#calc-result{background:var(--bg);border:1px solid var(--line);border-left:4px solid var(--acc)}
.btn{box-shadow:0 3px 10px rgba(15,118,110,.35)}
h2{margin-top:36px}
.faq{box-shadow:0 1px 4px rgba(14,42,71,.05)}