/* ============================================================
   apk.css · 名爵apk 内页骨架：APK 解剖图
   炭黑底 + 琥珀标注线 + 骨白文字，工程图纸风
   ============================================================ */

.page-apk {
  --paper: #141412;
  --ink: #f0ece2;
  --ink-soft: #b9b3a6;
  --ink-faint: #7f7a6f;
  --line: rgba(240, 236, 226, 0.14);
  --accent: #ffb23e;
  --accent-ink: #141412;
  --amber-soft: rgba(255, 178, 62, 0.12);
  --header-bg: rgba(20, 20, 18, 0.9);
  --header-fg: #f0ece2;
  --header-line: rgba(240, 236, 226, 0.12);
  --tab-on: #ffb23e;
  --tab-on-fg: #141412;
  background: var(--paper);
}

/* ---------- hero ---------- */
.ax-hero {
  position: relative;
  padding: 46px 0 60px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.ax-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 178, 62, 0.09) 1px, transparent 1px) 0 0 / 120px 120px,
    linear-gradient(rgba(255, 178, 62, 0.09) 1px, transparent 1px) 0 0 / 120px 120px;
  opacity: 0.55;
  -webkit-mask-image: radial-gradient(120% 90% at 60% 40%, #000 30%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 60% 40%, #000 30%, transparent 78%);
  pointer-events: none;
}
.ax-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.98fr);
  gap: 48px;
  align-items: center;
}
.ax-rail {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
}
.ax-rail::before, .ax-rail::after {
  content: "";
  height: 1px;
  width: 34px;
  background: currentColor;
  opacity: 0.6;
}
.ax-title {
  font-size: clamp(38px, 5.4vw, 68px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.03em;
}
.ax-title em {
  display: block;
  margin-top: 10px;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.26em;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--accent);
}
.ax-lead {
  max-width: 36em;
  margin-top: 24px;
  font-size: 15.5px;
  color: var(--ink-soft);
}
.ax-lead strong { color: var(--ink); font-weight: 600; }
.ax-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.ax-actions .btn-primary { color: var(--accent-ink); }
.ax-actions .btn-room { border-color: rgba(240, 236, 226, 0.34); }
.ax-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}
.ax-meta span::before { content: "▸ "; color: var(--accent); }

.ax-figure { position: relative; }
.ax-figure::before {
  content: "";
  position: absolute;
  inset: 8% 6%;
  border: 1px dashed rgba(255, 178, 62, 0.35);
  border-radius: 50%;
  pointer-events: none;
}
.ax-figure img { position: relative; width: 100%; height: auto; }
.ax-figcap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  text-align: right;
}

/* ---------- generic ---------- */
.ax-sec { padding: 72px 0; border-bottom: 1px solid var(--line); }
.ax-sec:last-of-type { border-bottom: 0; }
.ax-head { margin-bottom: 34px; }
.ax-head .no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent);
}
.ax-head h2 {
  font-size: clamp(25px, 3.2vw, 38px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.ax-head p { max-width: 44em; margin-top: 10px; font-size: 14.5px; color: var(--ink-soft); }

/* spec ledger */
.ax-spec { border-top: 1px solid var(--line); }
.ax-spec-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.ax-spec-row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.ax-spec-row dd { margin: 0; font-size: 14.5px; }
.ax-spec-row dd b { color: var(--accent); font-weight: 700; }

/* layers */
.ax-layers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: layer; }
.ax-layer {
  position: relative;
  padding: 24px 20px 26px;
  border: 1px solid var(--line);
  background: rgba(240, 236, 226, 0.03);
  transition: transform 0.25s var(--ease), border-color 0.25s;
}
.ax-layer:hover { transform: translateY(-4px); border-color: rgba(255, 178, 62, 0.5); }
.ax-layer::before {
  counter-increment: layer;
  content: "L" counter(layer);
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent);
}
.ax-layer h3 { font-size: 16px; font-weight: 800; }
.ax-layer p { margin-top: 8px; font-size: 13px; color: var(--ink-soft); }
.ax-layer code { font-family: var(--font-mono); font-size: 11px; color: var(--accent); }

/* bar chart */
.ax-bars { display: grid; gap: 14px; }
.ax-bar {
  display: grid;
  grid-template-columns: 130px 1fr 54px;
  align-items: center;
  gap: 16px;
  font-size: 13.5px;
}
.ax-bar .track { height: 10px; background: rgba(240, 236, 226, 0.08); border-radius: 2px; overflow: hidden; }
.ax-bar .fill { display: block; height: 100%; background: linear-gradient(90deg, rgba(255, 178, 62, 0.45), var(--accent)); }
.ax-bar .val { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); text-align: right; }
.ax-note { margin-top: 18px; font-size: 12.5px; color: var(--ink-faint); }

/* code */
.ax-code {
  position: relative;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: #0f0f0e;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: #d8d2c4;
  overflow-x: auto;
}
.ax-code b { color: var(--accent); font-weight: 600; }
.ax-code span { color: #7f8a6f; }

/* two column */
.ax-two { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
.ax-copy p { font-size: 14.5px; color: var(--ink-soft); }
.ax-copy p + p { margin-top: 12px; }
.ax-copy b { color: var(--ink); }

/* warn */
.ax-warn {
  margin-top: 22px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 178, 62, 0.4);
  background: var(--amber-soft);
  font-size: 13.5px;
  color: #edd9b6;
}
.ax-warn b { color: var(--accent); }

/* permissions */
.ax-perms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.ax-perm {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
}
.ax-perm i {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 7px;
  border-radius: 50%;
  background: #7f8a6f;
}
.ax-perm.mid i { background: var(--accent); }
.ax-perm.high i { background: #ff6b4a; }
.ax-perm b { display: block; font-size: 13.5px; font-weight: 700; }
.ax-perm span { display: block; margin-top: 2px; font-size: 12px; color: var(--ink-faint); }

/* tree */
.ax-tree {
  padding: 24px 26px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2;
  color: var(--ink-soft);
  overflow-x: auto;
}
.ax-tree b { color: var(--ink); font-weight: 600; }
.ax-tree em { font-style: normal; color: var(--accent); }
.ax-tree span { color: var(--ink-faint); }

/* steps */
.ax-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.ax-step { padding: 22px; border: 1px solid var(--line); }
.ax-step::before {
  counter-increment: s;
  content: "STEP 0" counter(s);
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--accent);
}
.ax-step h3 { font-size: 15.5px; font-weight: 800; }
.ax-step p { margin-top: 6px; font-size: 13px; color: var(--ink-soft); }

/* faq */
.ax-faq { max-width: 900px; border-top: 1px solid var(--line); }

/* related */
.ax-related { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ax-related a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 22px;
  border: 1px solid var(--line);
  transition: background 0.2s, border-color 0.2s;
}
.ax-related a:hover { background: rgba(255, 178, 62, 0.06); border-color: rgba(255, 178, 62, 0.45); }
.ax-related em { font-style: normal; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; color: var(--ink-faint); }
.ax-related b { font-size: 16px; }
.ax-related span { font-size: 12.5px; color: var(--ink-faint); }

/* cta */
.ax-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 34px;
  border: 1px solid rgba(255, 178, 62, 0.4);
  background: var(--amber-soft);
}
.ax-cta h2 { font-size: clamp(21px, 2.4vw, 28px); font-weight: 900; }
.ax-cta p { margin-top: 6px; font-size: 13.5px; color: var(--ink-soft); }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .ax-hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .ax-figure { max-width: 540px; }
  .ax-layers { grid-template-columns: repeat(2, 1fr); }
  .ax-perms { grid-template-columns: repeat(2, 1fr); }
  .ax-related { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .ax-hero { padding: 30px 0 40px; }
  .ax-sec { padding: 52px 0; }
  .ax-spec-row { grid-template-columns: 1fr; gap: 4px; }
  .ax-two { grid-template-columns: 1fr; gap: 24px; }
  .ax-bars .ax-bar { grid-template-columns: 92px 1fr 44px; gap: 10px; font-size: 12.5px; }
  .ax-steps { grid-template-columns: 1fr; }
  .ax-perms { grid-template-columns: 1fr; }
  .ax-related { grid-template-columns: 1fr; }
  .ax-cta { padding: 24px; }
}