/* ==========================================================================
   帮助页 / 文档排版
   ========================================================================== */
.doc-hero { padding: clamp(120px, 15vh, 168px) 0 clamp(28px, 4vw, 40px); }
.doc-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.35;
}
.doc-hero p { max-width: 60ch; margin-top: 16px; font-size: 15px; color: var(--paper-dim); line-height: 1.9; }

.doc-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
  padding-bottom: clamp(70px, 9vw, 110px);
}

.doc-toc {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 1px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.018);
}
.doc-toc b {
  padding: 8px 10px 6px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.doc-toc a {
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 12.8px;
  color: var(--muted);
  transition: color 0.2s, background 0.2s;
}
.doc-toc a:hover { color: var(--paper); background: rgba(232, 180, 115, 0.08); }

.doc { display: grid; gap: 8px; }
.doc-sec {
  padding: clamp(22px, 3vw, 30px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}
.doc-sec:first-of-type { border-top: 0; padding-top: 0; }
.doc-sec h2 {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.4;
}
.doc-sec h2 i {
  font-family: var(--font-mono);
  font-size: 10px;
  font-style: normal;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.doc-sec h3 { margin: 18px 0 8px; font-size: 14.5px; color: var(--paper-dim); }
.doc-sec p { font-size: 13.8px; line-height: 1.9; color: var(--muted); }
.doc-sec p + p { margin-top: 10px; }
.doc-sec strong { color: var(--paper-dim); font-weight: 500; }

.doc-sec ul, .doc-sec ol { margin: 10px 0 0; padding-left: 20px; color: var(--muted); font-size: 13.8px; line-height: 1.95; }
.doc-sec li::marker { color: rgba(232, 180, 115, 0.6); }
.doc-sec code {
  padding: 2px 6px;
  border: 1px solid rgba(232, 180, 115, 0.18);
  border-radius: 6px;
  background: rgba(232, 180, 115, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  color: #f0d3ac;
}
.doc-sec pre {
  margin: 12px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0d0b0e;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  color: #d8cbb9;
}
.doc-sec pre code { padding: 0; border: 0; background: none; color: inherit; font-size: inherit; }

.callout {
  display: grid;
  gap: 4px;
  margin: 16px 0 0;
  padding: 14px 16px;
  border: 1px solid rgba(232, 180, 115, 0.26);
  border-radius: 10px;
  background: rgba(232, 180, 115, 0.05);
  font-size: 13px;
  line-height: 1.8;
  color: var(--paper-dim);
}
.callout b { font-size: 11px; letter-spacing: 0.14em; color: var(--gold); font-weight: 600; }

.doc-table { width: 100%; margin-top: 12px; border-collapse: collapse; font-size: 13px; }
.doc-table th, .doc-table td { padding: 9px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.doc-table th { font-weight: 500; color: var(--paper-dim); font-size: 12px; letter-spacing: 0.04em; }
.doc-table td { color: var(--muted); }

.doc-nav {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.doc-nav a { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--gold); }
.doc-nav a svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.6; }

@media (max-width: 900px) {
  .doc-layout { grid-template-columns: 1fr; }
  .doc-toc { position: static; grid-template-columns: 1fr 1fr; }
  .doc-toc b { grid-column: 1 / -1; }
}