/* 序伴 · App 分发 / 宣传海报页
   纸色桌面 + 一块完整的深夜色海报；版式与 1080×1920 的分享图同构。 */

.app-poster {
  padding: clamp(32px, 5vw, 64px) 0 clamp(64px, 8vw, 100px);
  background: var(--paper);
}

.poster-frame {
  width: min(1040px, calc(100% - 32px));
  margin-inline: auto;
  padding: clamp(24px, 4vw, 52px);
  background: var(--night);
  color: var(--on-dark);
}

.poster-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
}

.poster-brand {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--rose);
}

.poster-top-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.poster-version {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--on-dark-2);
}

.poster-main {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
  margin-top: clamp(28px, 4vw, 46px);
}

.poster-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 8.6vw, 50px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.045em;
}

.poster-lead {
  max-width: 23em;
  margin-top: 22px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--on-dark-2);
}

.poster-quote {
  margin-top: 30px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.6;
  color: var(--on-dark);
}

.poster-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 34px;
  font-size: 12px;
  color: var(--on-dark-2);
}

.poster-facts b {
  margin-right: 5px;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
  color: var(--rose);
}

.poster-shot {
  position: relative;
  justify-self: end;
  width: min(300px, 100%);
}

.poster-plate {
  padding: 16px 16px 0;
  background: var(--paper);
}

.poster-plate img {
  width: 100%;
}

.poster-note {
  width: 100%;
  max-width: 300px;
  margin-top: 14px;
  padding: 14px 16px 16px;
  border-left: 4px solid var(--rose);
  background: var(--night-2);
}

.poster-note time {
  display: block;
  font-size: 11px;
  color: var(--on-dark-2);
}

.poster-note p {
  margin-top: 6px;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.55;
  color: var(--on-dark);
}

.poster-download {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: 24px;
  align-items: center;
  margin-top: 36px;
  padding: 20px;
  background: var(--night-2);
}

.poster-qr {
  width: 150px;
  margin: 0;
  padding: 8px;
  background: var(--paper);
}

.poster-qr img {
  width: 100%;
}

.poster-qr figcaption {
  margin-top: 5px;
  text-align: center;
  font-size: 10px;
  line-height: 1.4;
  color: var(--ink);
}

.poster-meta-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

.poster-meta-sub {
  margin-top: 6px;
  font-size: 12px;
  color: var(--on-dark-2);
}

.poster-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.poster-after {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(1040px, calc(100% - 32px));
  margin: 22px auto 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-2);
}

.poster-after a {
  white-space: nowrap;
}

@media (max-width: 900px) {
  .poster-main {
    grid-template-columns: 1fr;
  }

  .poster-shot {
    justify-self: start;
    margin-top: 18px;
  }
}

@media (max-width: 760px) {
  .poster-download {
    grid-template-columns: 120px 1fr;
  }

  .poster-qr {
    width: 120px;
  }

  .poster-actions {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }

  .poster-after {
    flex-direction: column;
    gap: 6px;
  }
}

@media (max-width: 480px) {
  .poster-top {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .poster-top-right {
    align-items: flex-start;
  }

  .poster-brand {
    font-size: 26px;
  }

  .poster-download {
    grid-template-columns: 1fr;
  }

  .poster-qr {
    width: 140px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .poster-frame {
    opacity: 1;
    transform: none;
    transition: none;
  }
}