:root{
  --bg:#ffffff; --text:#1f2937; --muted:#6b7280; --line:#e5e7eb;
  --soft:#f9fafb; --accent:#b91c1c; --accent-dark:#7f1d1d; --gold:#d97706;
  --link:#1d4ed8;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:880px;margin:0 auto;padding:28px 20px 48px}
h1{font-size:1.9rem;line-height:1.3;margin:.4em 0 .5em}
h2{font-size:1.35rem;margin:1.6em 0 .5em;border-bottom:2px solid var(--line);padding-bottom:.25em}
h3{font-size:1.12rem;margin:1.3em 0 .4em}
p{margin:.7em 0}
ul,ol{padding-left:1.4em;margin:.6em 0}
li{margin:.3em 0}
blockquote{margin:1em 0;padding:.6em 1em;border-left:4px solid var(--gold);background:var(--soft);color:var(--muted)}
table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.95rem;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:.55em .7em;text-align:left;vertical-align:top}
th{background:var(--soft)}
tr.hl td{background:#fef2f2;font-weight:600}
.site-header{position:sticky;top:0;z-index:20;display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  background:#fff;border-bottom:1px solid var(--line);padding:10px 20px}
.logo{font-weight:800;font-size:1.15rem;color:var(--accent);letter-spacing:.2px}
.logo:hover{text-decoration:none}
.site-nav{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:.9rem}
.site-nav a{color:var(--text)}
.site-nav a:hover{color:var(--accent);text-decoration:none}
.lede{font-size:1.08rem;color:var(--muted)}
.card{border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:1.1em 0;background:var(--soft)}
.card h3{margin-top:0}
.pick{border:2px solid var(--accent);background:#fff7f7}
.badge{display:inline-block;background:var(--accent);color:#fff;font-size:.72rem;font-weight:700;
  padding:2px 8px;border-radius:999px;vertical-align:middle;margin-left:6px}
.faq details{border:1px solid var(--line);border-radius:10px;padding:.6em 1em;margin:.5em 0;background:var(--soft)}
.faq summary{cursor:pointer;font-weight:600}
.cta-box{border-radius:16px;padding:26px 24px;margin:2em 0;text-align:center;
  background:linear-gradient(135deg,#7f1d1d,#b91c1c 55%,#d97706);color:#fff}
.cta-kicker{margin:0;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;opacity:.85}
.cta-title{margin:.3em 0 .4em;font-size:1.5rem;color:#fff;border:0}
.cta-text{margin:.3em auto .9em;max-width:560px;opacity:.95}
.cta-btn{display:inline-block;background:#fff;color:var(--accent-dark);font-weight:800;
  padding:13px 34px;border-radius:999px;font-size:1.05rem;box-shadow:0 4px 14px rgba(0,0,0,.25)}
.cta-btn:hover{text-decoration:none;transform:translateY(-1px)}
.cta-note{font-size:.78rem;opacity:.85;margin:.9em 0 0}
.calc{border:1px solid var(--line);border-radius:12px;padding:18px;background:var(--soft);margin:1em 0}
.calc label{display:block;font-weight:600;margin:.5em 0 .2em}
.calc input{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:8px;font-size:1rem}
.calc button{margin-top:12px;background:var(--accent);color:#fff;border:0;padding:11px 26px;
  border-radius:999px;font-size:1rem;font-weight:700;cursor:pointer}
#c-out{margin-top:12px;font-weight:700;color:var(--accent-dark)}
.site-footer{border-top:1px solid var(--line);padding:22px 20px 34px;text-align:center;color:var(--muted);font-size:.85rem}
.foot-18{font-weight:700;color:var(--text)}
.foot-nav{margin:.5em 0}
.foot-disc{max-width:640px;margin:.6em auto}
.foot-copy{margin-top:.8em}
@media (max-width:640px){
  h1{font-size:1.5rem}
  .site-nav{font-size:.82rem}
}