/* 产品系统场景（sticky 叠层：灵境 AI 创作平台、漫剧有数、Loomicc、联系方式） */
.home-continuation, .systems-story { position: relative; }
.systems-deck {
  position: relative;
  padding: clamp(112px, 12vw, 176px) clamp(20px, 6vw, 88px) 88px;
  background-color: var(--night);
  background-image: radial-gradient(circle, var(--dot) 0.8px, transparent 0.95px);
  background-size: 21px 21px;
}
.systems-bridge {
  max-width: min(900px, 100%);
  margin: 0 auto clamp(96px, 12vw, 160px);
  color: var(--night-ink);
  text-align: center;
}
.systems-bridge h2, .systems-bridge p { margin: 0; }
.systems-bridge h2 { font-size: var(--type-section); font-weight: var(--weight-display); line-height: var(--leading-display); letter-spacing: 0.025em; word-spacing: 0.08em; white-space: nowrap; }
.systems-bridge p { max-width: 24em; margin: 16px auto 0; }
.project-sheet {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 22px;
  width: min(1160px, 100%);
  margin: 0 auto clamp(112px, 13vw, 184px);
}
.project-sheet-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  width: min(440px, 100%);
}
.project-title, .project-sheet-copy p { margin: 0; }
.project-title { font-size: var(--type-title); font-weight: var(--weight-display); line-height: var(--leading-title); letter-spacing: -0.035em; text-wrap: balance; }
.project-sheet-copy p { max-width: none; color: var(--night-muted); font-size: var(--type-body); line-height: var(--leading-copy); letter-spacing: var(--tracking-copy); }
.project-visit, .project-availability { margin-left: 0; font-family: var(--font-display); font-size: var(--type-eyebrow); letter-spacing: 0.06em; white-space: nowrap; }
.project-visit { color: var(--night-ink); text-decoration-color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 6px; }
.project-visit:hover { color: var(--cyan); text-decoration-color: var(--rose); }
.project-visit span { display: inline-block; margin-left: 5px; transition: transform 180ms var(--ease-out); }
.project-visit:hover span { transform: translate(2px, -2px); }
.project-availability { color: var(--night-muted); }
.project-board {
  position: relative;
  z-index: 2;
  width: 100%;
  margin: 0;
  border: 1px solid oklch(1 0 0 / 0.14);
  border-radius: 14px;
  background: var(--night-raised);
  box-shadow:
    inset 0 1px 0 oklch(1 0 0 / 0.1),
    0 2px 4px oklch(0 0 0 / 0.5),
    0 16px 32px -12px oklch(0 0 0 / 0.7);
  overflow: hidden;
}
.project-board img { display: block; width: 100%; height: auto; }
.project-board[data-image-error] { display: grid; min-height: 220px; place-items: center; }
.project-board[data-image-error]::after { padding: 24px; color: var(--night-muted); content: attr(data-image-error); text-align: center; }

.contact-links { display: flex; flex-wrap: wrap; gap: 12px 34px; margin-top: 96px; font-style: normal; }
.systems-contact { justify-content: flex-end; width: min(1160px, 100%); margin: 0 auto; }
.contact-links a { color: var(--night-ink); font-size: var(--type-body); text-decoration-color: oklch(0.82 0.14 195 / 0.6); text-decoration-thickness: 1px; text-underline-offset: 5px; }
.contact-links a:hover { color: var(--cyan); text-decoration-color: var(--rose); }

@media (min-width: 761px) and (prefers-reduced-motion: no-preference) {
  .motion-ready .home-continuation {
    z-index: 2;
    margin-top: -110dvh;
    pointer-events: none;
  }
  .motion-ready .systems-story {
    height: 520dvh;
    min-height: calc(2800px + 80dvh);
    pointer-events: none;
  }
  .motion-ready .systems-deck {
    position: sticky;
    top: 0;
    height: 100dvh;
    padding: 0;
    isolation: isolate;
    overflow: hidden;
    background: transparent;
    /* The sticky deck spans the archive hand-off; it must not block folders below it. */
    pointer-events: none;
  }
  /* Motion code enables only the current card/contact with inline pointer events. */
  .motion-ready .project-sheet,
  .motion-ready .systems-contact {
    pointer-events: auto;
  }
  .motion-ready .systems-bridge {
    position: absolute;
    z-index: 6;
    left: 50%;
    top: clamp(64px, 9vh, 96px);
    width: min(760px, calc(100% - 48px));
    margin: 0;
    transform: translateX(-50%);
    will-change: opacity, filter, transform;
  }
  .motion-ready .project-sheet {
    position: absolute;
    left: 50%;
    top: 60%;
    z-index: 2;
    display: grid;
    grid-template-rows: auto auto auto;
    align-content: center;
    justify-content: center;
    justify-items: start;
    gap: clamp(10px, 1.4vh, 16px);
    width: 100%;
    height: 88%;
    margin: 0;
    opacity: 0;
    transform: translate(-50%, -50%) translateY(110px) scale(0.92);
    transform-origin: center;
    will-change: opacity, transform;
  }
  /* 列宽按配置中的图片比例限制，保证展板高度不超过 48dvh。 */
  .motion-ready .project-sheet { grid-template-columns: min(1060px, 82vw, calc(48dvh * var(--project-aspect, 1.6))); }
  .motion-ready .project-sheet-copy {
    position: relative;
    z-index: 5;
    grid-column: 1;
    grid-row: 3;
    width: min(440px, 100%);
    will-change: opacity, transform;
  }
  .motion-ready .project-board {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
  }
  .motion-ready .project-title {
    grid-column: 1;
    grid-row: 1;
    width: 100%;
    will-change: opacity, transform;
  }
  .motion-ready .systems-contact {
    position: absolute;
    z-index: 8;
    right: clamp(28px, 5vw, 76px);
    bottom: clamp(22px, 3.2vh, 38px);
    width: auto;
    margin: 0;
    opacity: 0;
    pointer-events: none;
    transform: translateY(14px);
    will-change: opacity, transform;
  }
}

/* 矮视口（≤800px 高）下卡片组再下移一档，避免卡片标题与章节副标题相撞 */
@media (min-width: 761px) and (max-height: 800px) and (prefers-reduced-motion: no-preference) {
  .motion-ready .project-sheet {
    top: 64%;
  }
}

@media (max-width: 760px) {
  .systems-deck { padding: 104px 16px 72px; background-size: 16px 16px; }
  .systems-bridge { max-width: 100%; margin-bottom: 96px; text-align: left; }
  .systems-bridge h2 { font-size: clamp(2.7rem, 13vw, 4rem); white-space: normal; }
  .systems-bridge p { max-width: 18ch; margin: 20px 0 0; }
  .project-sheet { gap: 18px; margin-bottom: 94px; }
  .project-sheet-copy { display: block; }
  .project-title { font-size: clamp(1.55rem, 7vw, 2rem); }
  .project-sheet-copy p { max-width: 24ch; margin-top: 12px; font-size: 0.92rem; }
  .project-visit, .project-availability { display: inline-flex; margin: 16px 0 0; font-size: 0.76rem; }
  .project-board { border-radius: 10px; box-shadow: 0 2px 4px oklch(0 0 0 / 0.45), 0 12px 24px -12px oklch(0 0 0 / 0.65); }
  .systems-contact { display: grid; justify-content: stretch; gap: 16px; width: 100%; margin-top: 16px; }
}