* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: #1e293b;
  background: #fff1f2;
  line-height: 1.72;
}
a { color: #be123c; }

.zrk-top {
  position: sticky;
  top: 0;
  z-index: 40;
  background: #881337;
  color: #ffe4e6;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.zrk-brand { font-size: 21px; font-weight: 800; }
.zrk-btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  background: #e11d48;
  color: #fff !important;
  font-weight: 700;
  font-size: 14px;
  border: none;
  cursor: pointer;
}
.zrk-wrap { max-width: 920px; margin: 0 auto; padding: 0 18px 48px; }
.zrk-hero { text-align: center; padding: 36px 0 22px; }
.zrk-hero h1 { margin: 0 0 12px; font-size: clamp(26px, 4.2vw, 38px); color: #881337; }
.zrk-lead { margin: 0 auto 18px; max-width: 700px; color: #64748b; font-size: 18px; }
.zrk-toc {
  background: #fff;
  border: 1px solid #fecdd3;
  border-radius: 14px;
  padding: 18px 22px;
  margin-bottom: 24px;
}
.zrk-toc h2 { margin: 0 0 10px; font-size: 17px; color: #9f1239; }
.zrk-toc ol { margin: 0; padding-left: 22px; }
.zrk-sec {
  background: #fff;
  border: 1px solid #fecdd3;
  border-radius: 14px;
  padding: 24px 26px;
  margin-bottom: 18px;
}
.zrk-sec h2 { margin-top: 0; color: #9f1239; }
.zrk-dash {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0;
}
.zrk-dash div {
  background: #fff1f2;
  border: 1px solid #fda4af;
  border-radius: 10px;
  padding: 14px;
  text-align: center;
  font-size: 14px;
}
.zrk-dash b { display: block; font-size: 22px; color: #be123c; }
.zrk-box {
  text-align: center;
  background: #ffe4e6;
  border: 2px solid #fb7185;
  border-radius: 12px;
  padding: 20px;
  margin: 16px 0;
}
.zrk-box a { font-size: 22px; font-weight: 800; }
.zrk-faq details { border-top: 1px solid #e2e8f0; padding: 11px 0; }
.zrk-faq summary { font-weight: 600; cursor: pointer; }
.zrk-foot { text-align: center; padding: 20px; color: #64748b; font-size: 14px; }
@media (max-width: 640px) { .zrk-dash { grid-template-columns: 1fr; } }