/*
 * Open Platform / PhyAgentOS 专用样式
 * ------------------------------------------------------------
 * 仅服务两个平台型章节。页面正文仍保持 MkDocs Material 结构，
 * 这里负责参考材料中的分层卡片、流程与验收信息可视化。
 */

.eyebrow {
  display: inline-block;
  margin: .2rem 0 .45rem;
  color: var(--ok-brand);
  font-size: .64rem;
  font-weight: 800;
  letter-spacing: .12em;
}

.md-typeset .lead {
  margin: .2rem 0 1.1rem;
  color: var(--ok-text);
  font-size: .84rem;
  line-height: 1.75;
}

.platform-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(250px, .92fr);
  gap: 1.4rem;
  margin: 1rem 0 1.8rem;
  padding: 1.35rem;
  color: #fff;
  background: #252831;
  border-radius: .45rem;
}

.platform-hero > div:first-child > span {
  color: #ff6b73;
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: .12em;
}

.platform-hero h2 {
  margin: .45rem 0 .5rem;
  color: #fff;
  font-size: 1.15rem;
}

.platform-hero p {
  color: #d9dde5;
  line-height: 1.7;
}

.platform-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin-top: .8rem;
}

.platform-hero .md-button {
  color: #fff;
  border-color: rgba(255,255,255,.7);
}

.platform-hero .md-button--primary {
  border-color: var(--ok-brand);
  background: var(--ok-brand);
}

.platform-orbit {
  position: relative;
  min-height: 220px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 999px;
}

.platform-orbit::before,
.platform-orbit::after {
  content: "";
  position: absolute;
  inset: 16%;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px;
}

.platform-orbit::after { inset: 31%; }

.platform-orbit strong {
  position: relative;
  z-index: 2;
  color: #fff;
  text-align: center;
  font-size: 1rem;
  line-height: 1.2;
}

.platform-orbit > span {
  position: absolute;
  z-index: 2;
  min-width: 3.3rem;
  padding: .18rem .4rem;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  background: #30343f;
  color: #fff;
  font-size: .6rem;
  text-align: center;
}
.platform-orbit > span:nth-child(1) { top: 8%; left: 50%; transform: translateX(-50%); }
.platform-orbit > span:nth-child(2) { right: 5%; top: 50%; transform: translateY(-50%); }
.platform-orbit > span:nth-child(3) { bottom: 8%; left: 50%; transform: translateX(-50%); }
.platform-orbit > span:nth-child(4) { left: 5%; top: 50%; transform: translateY(-50%); }

.platform-layer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem;
  margin: .85rem 0 1.7rem;
}

.platform-layer-grid section,
.audience-grid section,
.feature-card {
  padding: 1rem;
  border: 1px solid var(--ok-border-light);
  background: var(--ok-card-bg);
}

.platform-layer-grid section { border-top: 3px solid var(--ok-brand); }
.platform-layer-grid span,
.feature-card > span {
  color: var(--ok-brand);
  font-size: 1rem;
  font-weight: 800;
}
.platform-layer-grid small {
  margin-left: .4rem;
  color: var(--ok-text-muted);
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .08em;
}
.platform-layer-grid h3,
.feature-card h3,
.audience-grid h3 {
  margin: .7rem 0 .3rem;
}
.platform-layer-grid p,
.feature-card p,
.audience-grid p { color: var(--ok-text); }
.platform-layer-grid a { font-weight: 700; }

.platform-journey {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  margin: .85rem 0 1.8rem;
  border: 1px solid var(--ok-border-light);
  background: var(--ok-border-light);
  gap: 1px;
}
.platform-journey > div {
  padding: .9rem;
  background: var(--ok-card-bg);
}
.platform-journey span {
  color: var(--ok-brand);
  font-size: .64rem;
  font-weight: 800;
}
.platform-journey strong {
  display: block;
  margin: .5rem 0 .25rem;
  color: var(--ok-text-strong);
}
.platform-journey p { margin: 0; color: var(--ok-text); }

.audience-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: .65rem;
  margin: .85rem 0 1.7rem;
}
.audience-grid span {
  color: var(--ok-brand);
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: .08em;
}

.open-boundary-card {
  display: grid;
  gap: 1px;
  margin: .85rem 0;
  border: 1px solid var(--ok-border-light);
  background: var(--ok-border-light);
}
.open-boundary-card > div {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: .8rem;
  padding: .78rem .9rem;
  background: var(--ok-card-bg);
}
.open-boundary-card span {
  color: var(--ok-brand);
  font-weight: 800;
}
.open-boundary-card strong { color: var(--ok-text-strong); }

.next-step {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .8rem;
  align-items: center;
  margin: 1.3rem 0 .4rem;
  padding: .85rem .95rem;
  border: 1px solid var(--ok-border-light);
  border-left: 3px solid var(--ok-brand);
  background: var(--ok-card-bg);
}
.next-step > span {
  color: var(--ok-brand);
  font-size: .6rem;
  font-weight: 800;
}
.next-step strong { color: var(--ok-text-strong); }
.next-step p { margin: .1rem 0 0; color: var(--ok-text-muted); }
.next-step a { white-space: nowrap; font-weight: 700; }

.integration-flow {
  display: flex;
  gap: .45rem;
  align-items: stretch;
  overflow-x: auto;
  padding: .7rem 0 1rem;
}
.integration-flow > div {
  min-width: 7.5rem;
  flex: 1 0 7.5rem;
  padding: .78rem;
  border: 1px solid var(--ok-border-light);
  background: var(--ok-card-bg);
}
.integration-flow > b {
  align-self: center;
  color: var(--ok-text-muted);
}
.integration-flow span {
  color: var(--ok-brand);
  font-weight: 800;
}
.integration-flow strong,
.integration-flow small { display: block; }
.integration-flow strong { margin: .45rem 0 .2rem; color: var(--ok-text-strong); }
.integration-flow small { color: var(--ok-text-muted); }

.verify-tag {
  display: inline-block;
  padding: .08rem .4rem;
  border: 1px solid var(--ok-border-light);
  border-radius: 999px;
  background: var(--ok-code-bg);
  color: var(--ok-text-muted);
  font-size: .62rem;
  font-weight: 700;
}

.source-note {
  padding: .75rem .85rem;
  border-left: 3px solid var(--ok-link);
  background: var(--ok-code-bg);
  color: var(--ok-text);
}

@media screen and (max-width: 60rem) {
  .platform-hero { grid-template-columns: 1fr; }
  .platform-orbit { min-height: 190px; }
  .platform-journey { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media screen and (max-width: 44rem) {
  .platform-layer-grid,
  .audience-grid,
  .feature-grid,
  .platform-journey { grid-template-columns: 1fr; }
  .open-boundary-card > div { grid-template-columns: 1fr; gap: .2rem; }
  .next-step { grid-template-columns: 1fr; }
}