/* 教程 / 扩展等门户子页 — 与 site.css 同套墨夜青绿 */

.portal-main {
  width: min(1180px, calc(100% - 2.5rem));
  margin-inline: auto;
  padding: 2.75rem 0 5rem;
}

.home-guide.portal-guide h1,
.home-guide.portal-guide .portal-lede,
.home-guide.portal-guide .portal-cta-row {
  display: none;
}

.portal-guide h1,
.portal-extension h1 {
  margin: 0 0 0.65rem;
  font-family: var(--serif);
  font-size: clamp(2.15rem, 4.5vw, 3rem);
  font-weight: 400;
  letter-spacing: 0.03em;
  color: var(--paper);
  line-height: 1.12;
}

.portal-guide h1 span,
.portal-extension h1 span {
  color: var(--accent-bright);
}

.portal-guide h1 em,
.portal-extension h1 em {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.42em;
  font-weight: 400;
  color: var(--fog-dim);
  letter-spacing: 0.12em;
}

.portal-lede {
  margin: 0 0 1.75rem;
  max-width: 42em;
  font-size: 1.08rem;
  color: var(--fog);
  line-height: 1.6;
}

.portal-lede strong {
  color: var(--paper);
}

.portal-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0 0 2.5rem;
}

.portal-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.05rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid var(--hairline-strong);
  background: rgba(232, 239, 233, 0.06);
  color: var(--paper);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.portal-cta:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.portal-cta-primary {
  background: linear-gradient(145deg, rgba(126, 184, 154, 0.35), rgba(126, 184, 154, 0.18));
  border-color: rgba(126, 184, 154, 0.45);
  color: var(--paper);
}

.portal-section {
  margin-top: 3.25rem;
  padding-top: 0.25rem;
}

.portal-section h2 {
  margin: 0 0 0.85rem;
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--paper);
  line-height: 1.25;
}

.portal-section h2 .n {
  display: inline-block;
  margin-right: 0.55rem;
  font-style: italic;
  color: var(--accent);
}

.portal-section p {
  margin: 0 0 0.75rem;
  max-width: 46em;
  color: var(--fog);
  line-height: 1.62;
}

.portal-section p a {
  color: var(--accent-bright);
}

.portal-theme-list {
  margin: 0 0 0.5rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.1rem;
  font-size: 0.92rem;
  color: var(--fog-dim);
}

.portal-theme-list strong {
  color: var(--paper);
  font-weight: 600;
}

.portal-media {
  display: block;
  width: 100%;
  height: auto;
  margin: 1.35rem 0 0.45rem;
  border-radius: 14px;
  border: 1px solid var(--hairline-strong);
  box-shadow: 0 28px 56px rgba(0, 0, 0, 0.35);
  background: #0c100e;
}

.portal-cap {
  margin: 0 0 0.25rem;
  font-size: 0.84rem;
  color: var(--fog-dim);
  letter-spacing: 0.02em;
  max-width: 46em;
}

.portal-note {
  margin: 1.1rem 0 0;
  padding: 1rem 1.15rem;
  border-radius: 12px;
  border: 1px solid var(--hairline-strong);
  background: rgba(126, 184, 154, 0.08);
  color: var(--fog);
  max-width: 46em;
  font-size: 0.95rem;
  line-height: 1.55;
}

.portal-links {
  display: grid;
  gap: 0.65rem;
  margin: 1rem 0 0;
}

.portal-links a {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--hairline);
  background: rgba(232, 239, 233, 0.04);
  transition: border-color 0.2s var(--ease);
}

.portal-links a:hover {
  border-color: var(--accent);
}

.portal-links small {
  display: block;
  color: var(--fog-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.68rem;
  margin-bottom: 0.25rem;
}

.portal-links span {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--accent-bright);
}

.portal-foot {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--hairline);
  font-size: 0.92rem;
  color: var(--fog-dim);
}

.portal-foot a {
  color: var(--accent-bright);
}

.shell-nav a.is-active {
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.portal-extension .portal-media {
  margin-bottom: 2rem;
}

.portal-extension h2 {
  margin: 2rem 0 0.75rem;
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--paper);
}

.portal-install {
  display: grid;
  gap: 0.65rem;
}

.portal-install a {
  display: block;
  padding: 0.95rem 1rem;
  border-radius: 12px;
  text-decoration: none;
  border: 1px solid var(--hairline);
  background: rgba(232, 239, 233, 0.04);
  color: var(--paper);
  transition: border-color 0.2s var(--ease);
}

.portal-install a:hover {
  border-color: var(--accent);
}

.portal-install .where {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fog-dim);
  margin-bottom: 0.2rem;
}

.portal-install .name {
  font-size: 0.95rem;
  color: var(--accent-bright);
}

.portal-meta {
  margin: 1.75rem 0;
  color: var(--fog);
  font-size: 0.95rem;
}

.portal-meta code {
  font-family: var(--mono);
  font-size: 0.88em;
}

.portal-back {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--fog-dim);
  text-decoration: none;
}

.portal-back:hover {
  color: var(--paper);
}

@media (max-width: 640px) {
  .portal-main {
    width: min(1180px, calc(100% - 1.35rem));
    padding-top: 2rem;
  }
}