.docs-hero {
  padding: 76px 0;
  background: linear-gradient(120deg, #fcfdff, #edf5ff);
  border-bottom: 1px solid var(--line);
}
.docs-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  align-items: center;
  gap: 70px;
}
.docs-intro h1 {
  margin: 18px 0 20px;
  font-size: clamp(36px, 4.5vw, 56px);
  line-height: 1.25;
  letter-spacing: -1px;
}
.docs-lead {
  color: #405c7c;
  font-size: 22px;
  line-height: 1.75;
}
.docs-description {
  max-width: 540px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.9;
}
.docs-description a, .docs-scope a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.docs-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.docs-reader-note {
  max-width: 530px;
  margin-top: 17px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}
.docs-file-card {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  padding: 28px;
  border: 1px solid #dce7f5;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 50px #1e477b0c;
}
.docs-cover {
  overflow: hidden;
  border: 1px solid #e7edf5;
  border-radius: 6px;
  box-shadow: 0 6px 16px #173b6012;
}
.docs-cover img { display: block; width: 100%; height: auto; }
.docs-file-info { min-width: 0; }
.docs-file-type { color: var(--blue); font-size: 11px; }
.docs-file-info h2 { margin: 10px 0 20px; font-size: 22px; }
.docs-file-info dl { display: grid; gap: 13px; font-size: 12px; }
.docs-file-info dt { color: var(--muted); margin-bottom: 3px; }
.docs-file-info dd { margin: 0; color: #405c7c; }
.docs-content { padding: 48px 0 72px; }
.docs-scope {
  display: flex;
  gap: 16px;
  padding: 25px 28px;
  border: 1px solid #d6e5f7;
  border-radius: 12px;
  background: #f5f9ff;
}
.docs-scope-mark {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border: 1px solid #b5cfee;
  border-radius: 50%;
  color: var(--blue);
  font-weight: 600;
}
.docs-scope h2 { font-size: 16px; margin-bottom: 8px; }
.docs-scope p { color: var(--muted); font-size: 13px; line-height: 1.9; }
.docs-section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  flex-wrap: wrap;
  gap: 22px;
  margin: 56px 0 28px;
}
.docs-section-heading h2 { margin-top: 12px; font-size: 30px; }
.docs-section-heading p { color: var(--muted); font-size: 12px; line-height: 1.9; }
.docs-chapters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.docs-chapter {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: start;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  transition: border-color .2s, background .2s;
}
.docs-chapter:hover { border-color: #a9c9f2; background: #f9fbff; }
.docs-chapter-no { color: #91add0; font-size: 18px; font-weight: 500; }
.docs-chapter h3 { font-size: 17px; line-height: 1.6; }
.docs-chapter p { margin-top: 9px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.docs-page { padding-top: 3px; color: var(--blue); font-size: 11px; white-space: nowrap; }
.docs-tag { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 4px; background: #f1f4f8; color: #73859c; font-size: 10px; font-weight: 400; vertical-align: middle; }
.docs-help { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 38px; padding-top: 30px; border-top: 1px solid var(--line); }
.docs-help h2 { font-size: 20px; }
.docs-help p { margin-top: 8px; font-size: 13px; color: var(--muted); }
.docs-main a:focus-visible { outline: 3px solid #85b7f5; outline-offset: 5px; }
.docs-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
@media (max-width: 1050px) {
  .docs-hero-grid { gap: 36px; }
  .docs-file-card { gap: 18px; padding: 20px; }
  .docs-file-info h2 { font-size: 19px; }
  .docs-chapter { gap: 12px; padding: 20px; }
}
@media (max-width: 850px) {
  .docs-hero { padding: 52px 0; }
  .docs-hero-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .docs-file-card { width: 100%; max-width: 500px; grid-template-columns: minmax(0, .7fr) minmax(0, 1fr); }
  .docs-file-info dl { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 12px; }
  .docs-chapters { grid-template-columns: minmax(0, 1fr); }
  .docs-section-heading { margin-top: 40px; }
}
@media (max-width: 540px) {
  .docs-lead { font-size: 19px; }
  .docs-actions .button { width: 100%; }
  .docs-content { padding: 28px 0 48px; }
  .docs-file-card { gap: 16px; padding: 18px; }
  .docs-file-info h2 { margin-bottom: 16px; }
  .docs-file-info dl { grid-template-columns: 1fr; gap: 10px; }
  .docs-scope { padding: 20px 18px; gap: 12px; }
  .docs-scope h2 { font-size: 15px; }
  .docs-scope p { font-size: 12px; }
  .docs-section-heading h2 { font-size: 25px; }
  .docs-chapter { grid-template-columns: 25px minmax(0, 1fr); padding: 20px 18px; }
  .docs-page { grid-column: 2; padding-top: 0; }
  .docs-tag { margin-left: 0; }
  .docs-help .button { width: 100%; }
}