/* 一封来自安全屋的信（#/letter · 第二人称叙事页） */
.page-letter {
  max-width: 680px;
  margin: 0 auto;
  padding: 64px 24px 80px;
}
.letter-head { text-align: center; margin-bottom: 40px; }
.letter-eyebrow {
  font-size: 11px;
  letter-spacing: .32em;
  color: var(--accent-cyan, #35e0ff);
}
.letter-head h1 {
  margin: 12px 0 10px;
  font-size: 26px;
  letter-spacing: .12em;
}
.letter-sub {
  margin: 0;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--muted, #8a97b1);
}

.letter-body p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 2.1;
  letter-spacing: .04em;
  color: var(--ink, #e6ecf7);
}
.letter-body > p:first-child::first-letter {
  font-size: 1.9em;
  line-height: 1;
  color: var(--accent, #4d8dff);
}

/* 招募纸条：公告栏上被风掀起一角的那张 */
.letter-notice {
  position: relative;
  margin: 34px auto 8px;
  max-width: 440px;
  padding: 22px 26px 20px;
  background: color-mix(in srgb, var(--panel, #101827) 88%, transparent);
  border: 1px solid var(--line, rgba(140,170,255,.18));
  border-radius: 4px;
  transform: rotate(-1.2deg);
  box-shadow: 0 14px 30px rgba(0,0,0,.25);
  transition: transform .4s cubic-bezier(.22, 1, .36, 1);
}
.letter-notice:hover { transform: rotate(0deg) translateY(-2px); }
.letter-notice__pin {
  position: absolute;
  top: -7px; left: 50%;
  width: 14px; height: 14px;
  margin-left: -7px;
  border-radius: 50%;
  background: var(--accent-cyan, #35e0ff);
  box-shadow: 0 2px 6px rgba(0,0,0,.4);
}
.letter-notice p {
  margin: 0;
  font-size: 14px;
  line-height: 2;
  letter-spacing: .06em;
  text-align: center;
  color: var(--accent-cyan, #35e0ff);
}
.letter-sign {
  margin-top: 28px !important;
  text-align: right;
  font-size: 13px !important;
  color: var(--muted, #8a97b1) !important;
}

.letter-cta {
  margin-top: 44px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.letter-cta a {
  padding: 10px 22px;
  border: 1px solid var(--line, rgba(140,170,255,.25));
  border-radius: var(--radius-pill, 999px);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--accent-cyan, #35e0ff);
  text-decoration: none;
  transition: background .2s, border-color .2s, transform .2s;
}
.letter-cta a:hover { background: rgba(53,224,255,.08); border-color: var(--accent-cyan, #35e0ff); transform: translateY(-2px); }
.letter-cta .letter-cta__main {
  border-color: var(--accent-cyan, #35e0ff);
  background: rgba(53,224,255,.12);
  font-weight: 700;
}

@media (max-width: 640px) {
  .page-letter { padding: 44px 18px 60px; }
  .letter-head h1 { font-size: 21px; }
  .letter-body p { font-size: 14px; }
}