/* 简介页与 docs 占位页共用的样式 */

.subpage {
  padding-block: calc(var(--ks-section-pad) / 2);
}

.page-head {
  display: grid;
  gap: 12px;
  max-width: 68ch;
  margin-bottom: 40px;
}

.page-head .section-title {
  font-size: clamp(2.4rem, 4.4vw, 3.6rem);
}

/* 占位卡片：整体走 kinpaku 的纸面 + 发丝线语言 */
.placeholder {
  border: 1px dashed var(--ks-gray-2);
  border-radius: var(--ks-radius-sm);
  background: var(--ks-paper-raised);
  padding: 24px;
  display: grid;
  gap: 14px;
  max-width: 760px;
}

.placeholder__head {
  display: flex;
  align-items: center;
  gap: 8px;
}

.placeholder__led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ks-patina);
}

.placeholder h2 {
  font-family: var(--ks-font);
  font-size: var(--ks-type-lead-size);
  font-weight: 500;
  color: var(--ks-ink);
}

.placeholder ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.placeholder li {
  position: relative;
  padding-left: 16px;
  font-size: 0.875rem;
  color: var(--ks-text);
  line-height: 1.6;
}

.placeholder li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ks-patina);
}

/* docs 占位：左侧目录 + 右侧正文骨架 */

.doc-layout {
  display: grid;
  grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.doc-nav {
  position: sticky;
  top: 104px;
  display: grid;
  gap: 2px;
}

.doc-nav h2 {
  font-family: var(--ks-mono);
  font-size: var(--ks-type-eyebrow-size);
  letter-spacing: var(--ks-type-eyebrow-track);
  text-transform: uppercase;
  color: var(--ks-text-faint);
  font-weight: 500;
  margin-bottom: 8px;
}

.doc-nav a {
  font-size: 0.875rem;
  color: var(--ks-text-muted);
  text-decoration: none;
  padding: 6px 0 6px 12px;
  border-left: 2px solid var(--ks-rule);
}

.doc-nav a:hover,
.doc-nav a[aria-current="page"] {
  color: var(--ks-ink);
  border-left-color: var(--ks-kinpaku);
}

@media (max-width: 820px) {
  .doc-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .doc-nav {
    position: static;
  }
}