:root {
  --rose: #BE123C;
  --rose-deep: #9F1239;
  --blush: #FFF1F2;
  --ink: #1F2937;
  --paper: #FFFFFF;
  --line: #FECDD3;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(90deg, #9F1239 0 8px, transparent 8px),
    repeating-linear-gradient(
      180deg,
      var(--blush) 0 28px,
      #FFE4E6 28px 29px
    );
  line-height: 1.7;
}
a { color: inherit; }
.dot-rail {
  position: sticky;
  top: 24px;
  float: left;
  width: 56px;
  margin: 24px 0 24px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  z-index: 5;
}
.dot-rail::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--rose);
  opacity: 0.35;
}
.dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--rose);
  display: grid;
  place-items: center;
  text-decoration: none;
  position: relative;
  font-size: 11px;
  font-weight: 700;
  color: var(--rose-deep);
}
.dot:hover,
.dot:focus {
  background: var(--rose);
  color: #fff;
}
.wrap {
  margin-left: 92px;
  max-width: 980px;
  padding: 0 28px 48px;
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0 10px;
  border-bottom: 3px solid var(--rose);
}
.brand-mark {
  font-family: Georgia, "Songti SC", serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--rose-deep);
  letter-spacing: 0.04em;
}
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--rose-deep);
  border-bottom: 1px solid transparent;
}
nav a:hover { border-bottom-color: var(--rose); }
.hero {
  padding: 48px 0 28px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: center;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--rose);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: none;
}
h1, h2, h3 {
  font-family: Georgia, "Songti SC", "Noto Serif SC", serif;
  line-height: 1.35;
}
h1 { font-size: 2.15rem; margin: 0 0 16px; color: var(--rose-deep); }
h2 { font-size: 1.55rem; color: var(--rose-deep); margin: 0 0 14px; }
h3 { font-size: 1.1rem; margin: 0 0 10px; color: var(--ink); }
.hero p { margin: 0 0 12px; max-width: 38em; }
.cta {
  display: inline-block;
  margin: 16px 0 0;
  background: var(--rose);
  color: #fff;
  text-decoration: none;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: 0 8px 0 var(--rose-deep);
}
.cta:hover { transform: translateY(1px); box-shadow: 0 7px 0 var(--rose-deep); }
.hero-visual { display: grid; gap: 16px; }
.install-badge {
  background: var(--rose);
  color: #fff;
  border-radius: 50%;
  width: 220px;
  height: 220px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  box-shadow: 12px 12px 0 var(--rose-deep);
  border: 8px solid #fff;
}
.install-badge strong {
  font-family: Georgia, serif;
  font-size: 1.8rem;
  line-height: 1.2;
}
.install-badge span {
  display: block;
  margin-top: 8px;
  font-size: 0.85rem;
  max-width: 10em;
}
.hero-chips {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.hero-chips li {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 8px 10px;
  font-size: 0.86rem;
  border-left: 4px solid var(--rose);
}
.block { padding: 42px 0; border-top: 1px dashed var(--line); }
.icon-rows { display: grid; gap: 16px; }
.icon-rows article {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  background: var(--paper);
  padding: 16px 18px;
  border-radius: 12px;
  box-shadow: 0 1px 0 var(--line);
}
.icon-rows svg {
  width: 40px;
  height: 40px;
  color: var(--rose);
}
.icon-rows p, .tall3 p, .two-col p, .enc-grid p, .browser-pills p, .dual p { margin: 0 0 8px; }
.icon-rows strong { display: block; margin-bottom: 4px; }
.tall3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  align-items: stretch;
}
.tall3 article {
  background: var(--paper);
  min-height: 280px;
  padding: 22px 18px;
  border-top: 8px solid var(--rose);
  box-shadow: 0 12px 24px rgba(159, 18, 57, 0.08);
}
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.two-col article {
  background: #fff;
  padding: 22px;
  border: 1px solid var(--line);
}
.stepper-block { background: transparent; }
.v-stepper {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 18px;
  border-left: 4px solid var(--rose);
}
.v-stepper li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  margin: 0 0 28px;
  position: relative;
}
.v-stepper .num {
  width: 64px;
  height: 64px;
  margin-left: -54px;
  background: var(--rose);
  color: #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: Georgia, serif;
  font-size: 1.2rem;
  font-weight: 700;
  border: 4px solid var(--blush);
}
.v-stepper strong { color: var(--rose-deep); }
.enc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.enc-grid article {
  background: var(--paper);
  padding: 18px;
  border: 2px solid var(--rose);
}
.browser-pills {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.browser-pills li {
  flex: 1 1 200px;
  background: var(--paper);
  padding: 14px 16px;
  border-radius: 999px 12px 12px 999px;
  border: 1px solid var(--line);
}
.dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 8px;
}
.dual article { padding: 24px; }
.dual article:first-child {
  background: var(--rose);
  color: #fff;
}
.dual article:first-child h3,
.dual article:first-child p { color: #fff; }
.dual article:last-child {
  background: var(--ink);
  color: #fff;
}
.dual article:last-child h3,
.dual article:last-child p { color: #fff; }
.faq details {
  background: var(--paper);
  border: 1px solid var(--line);
  margin: 0 0 10px;
  padding: 4px 16px 4px;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 12px 0;
  color: var(--rose-deep);
}
.faq details p { padding-bottom: 12px; }
footer {
  margin-top: 20px;
  padding: 28px 0 8px;
  border-top: 3px solid var(--rose);
  font-size: 0.88rem;
  color: #4B5563;
}
footer p { margin: 0 0 8px; }
@media (max-width: 880px) {
  .dot-rail { display: none; }
  .wrap { margin-left: 0; }
  .hero, .tall3, .two-col, .enc-grid, .dual { grid-template-columns: 1fr; }
  .v-stepper li { grid-template-columns: 56px 1fr; }
  .v-stepper .num { width: 48px; height: 48px; margin-left: -44px; font-size: 1rem; }
}

#news .news-list { list-style: none; }
#news .news-list li { background: #fff; border-left: 6px solid #be123c; padding: 14px 16px; margin-bottom: 12px; }
#news time { color: #9f1239; font-size: 12px; font-weight: 700; }
#news .news-list h3 { color: #1f2937; margin: 6px 0; }