/* ============================================================
   一心水晶 · 完整功能文档 阅读样式 (东方典雅 + 印刷友好)
   ============================================================ */

:root {
  --color-paper: #f5efe0;
  --color-paper-deep: #ebe7dd;
  --color-paper-edge: #d6c9a8;
  --color-ink: #2d2d2d;
  --color-ink-light: #6d6d6d;
  --color-ink-muted: #999;
  --color-cinnabar: #8b1a1a;
  --color-cinnabar-deep: #5d1010;
  --color-jade: #2d5016;
  --color-gold: #b8941f;
  --font-serif: "Songti SC", "STSong", "SimSun", serif;
  --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", Menlo, "Consolas", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: #ece6d5;
  line-height: 1.7;
  font-size: 15px;
}

/* ============================================================
   顶部条
   ============================================================ */
.spec-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, #5d1010 0%, #3d0808 100%);
  color: var(--color-paper);
  padding: 12px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 16px rgba(60, 40, 20, 0.2);
}
.topbar-back {
  color: var(--color-paper);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 13px;
  opacity: 0.9;
}
.topbar-back:hover { opacity: 1; }
.topbar-title {
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 3px;
}
.topbar-btn {
  background: rgba(245, 239, 224, 0.15);
  color: var(--color-paper);
  border: 1px solid rgba(245, 239, 224, 0.3);
  padding: 6px 14px;
  font-family: var(--font-sans);
  font-size: 13px;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.15s;
}
.topbar-btn:hover { background: rgba(245, 239, 224, 0.25); }

/* ============================================================
   布局
   ============================================================ */
.spec-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  max-width: 1280px;
  margin: 0 auto;
  min-height: 100vh;
}

.spec-toc {
  position: sticky;
  top: 56px;
  align-self: start;
  max-height: calc(100vh - 56px);
  overflow-y: auto;
  padding: 24px 14px 24px 28px;
  border-right: 1px solid var(--color-paper-edge);
  background: var(--color-paper);
  font-family: var(--font-sans);
  font-size: 12px;
}
.toc-header {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--color-cinnabar);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-paper-edge);
}
.toc-section { margin-bottom: 8px; }
.toc-h2 {
  display: block;
  padding: 5px 8px;
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 500;
  border-left: 2px solid transparent;
  transition: all 0.15s;
}
.toc-h2:hover { background: rgba(139, 26, 26, 0.05); border-left-color: var(--color-cinnabar); }
.toc-h2.active {
  color: var(--color-cinnabar);
  border-left-color: var(--color-cinnabar);
  background: rgba(139, 26, 26, 0.08);
  font-weight: 600;
}
.toc-subs { padding-left: 14px; margin-top: 2px; }
.toc-h3 {
  display: block;
  padding: 3px 8px;
  color: var(--color-ink-light);
  text-decoration: none;
  font-size: 11px;
  line-height: 1.5;
}
.toc-h3:hover { color: var(--color-cinnabar); }
.toc-footer {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--color-paper-edge);
  font-size: 10px;
  color: var(--color-ink-muted);
  font-family: var(--font-sans);
}

/* ============================================================
   封面页
   ============================================================ */
.cover {
  background: linear-gradient(180deg, #f5efe0 0%, #ece6d5 100%);
  padding: 100px 60px;
  text-align: center;
  position: relative;
  border-bottom: 1px solid var(--color-paper-edge);
}
.cover-seal {
  width: 120px;
  height: 120px;
  margin: 0 auto 30px;
  background: var(--color-cinnabar);
  color: var(--color-paper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 64px;
  border: 4px solid var(--color-paper);
  box-shadow: 0 8px 32px rgba(139, 26, 26, 0.3);
}
.cover-title {
  font-family: var(--font-serif);
  font-size: 56px;
  letter-spacing: 12px;
  color: var(--color-ink);
  margin-bottom: 16px;
}
.cover-sub {
  font-family: var(--font-serif);
  font-size: 18px;
  letter-spacing: 4px;
  color: var(--color-cinnabar);
  margin-bottom: 40px;
}
.cover-tag {
  display: inline-block;
  padding: 6px 18px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--color-paper);
  background: var(--color-cinnabar);
  border-radius: 2px;
  margin-bottom: 30px;
}
.cover-meta {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-ink-light);
  line-height: 1.7;
  max-width: 500px;
  margin: 0 auto;
}
.cover-decor {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 50px;
}
.cd-bead {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  display: inline-block;
}

/* ============================================================
   正文样式 (prose)
   ============================================================ */
.prose {
  padding: 50px 60px 100px;
  background: var(--color-paper);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-ink);
}

.prose h1 {
  display: none; /* 标题已在 cover 里 */
}

.prose h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  letter-spacing: 4px;
  color: var(--color-cinnabar);
  margin-top: 60px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-cinnabar);
}
.prose h2:first-of-type { margin-top: 30px; }

.prose h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: 3px;
  color: var(--color-ink);
  margin-top: 36px;
  margin-bottom: 14px;
  padding-left: 12px;
  border-left: 4px solid var(--color-cinnabar);
}

.prose h4 {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--color-ink);
  margin-top: 24px;
  margin-bottom: 10px;
}

.prose p {
  margin-bottom: 14px;
  text-align: justify;
}

.prose strong { color: var(--color-cinnabar); font-weight: 600; }

.prose ul, .prose ol {
  margin: 14px 0 14px 28px;
}
.prose li { margin-bottom: 6px; }

.prose code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(139, 26, 26, 0.08);
  color: var(--color-cinnabar);
  padding: 1px 6px;
  border-radius: 2px;
}

.prose pre {
  background: #2d2d2d;
  color: #f5efe0;
  padding: 16px 20px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 14px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}
.prose pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

.prose blockquote {
  border-left: 4px solid var(--color-cinnabar);
  padding: 12px 18px;
  background: rgba(139, 26, 26, 0.04);
  margin: 16px 0;
  color: var(--color-ink-light);
  font-style: italic;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 13px;
  background: white;
  border: 1px solid var(--color-paper-edge);
}
.prose th {
  background: var(--color-paper-deep);
  text-align: left;
  padding: 10px 12px;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-paper-edge);
  font-size: 12px;
  letter-spacing: 1px;
}
.prose td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-paper-edge);
  vertical-align: top;
}
.prose tr:last-child td { border-bottom: none; }

.prose hr {
  border: none;
  border-top: 1px dashed var(--color-paper-edge);
  margin: 30px 0;
}

.prose a {
  color: var(--color-cinnabar);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-cinnabar);
}
.prose a:hover { background: rgba(139, 26, 26, 0.05); }

.loading {
  text-align: center;
  padding: 80px 0;
  color: var(--color-ink-muted);
  font-family: var(--font-sans);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .spec-shell { grid-template-columns: 1fr; }
  .spec-toc { display: none; }
  .prose { padding: 30px 24px 60px; }
  .cover { padding: 60px 24px; }
  .cover-title { font-size: 36px; letter-spacing: 6px; }
  .cover-sub { font-size: 14px; }
  .prose h2 { font-size: 22px; }
  .prose h3 { font-size: 16px; }
}

/* ============================================================
   打印 (Cmd+P → 存为 PDF)
   ============================================================ */
@media print {
  body { background: white; font-size: 11pt; line-height: 1.6; }
  .no-print { display: none !important; }
  .spec-shell { display: block; max-width: none; }
  .spec-content { padding: 0; }
  .cover {
    page-break-after: always;
    padding: 80px 40px;
    background: white;
  }
  .cover-title { font-size: 42pt; }
  .cover-sub { font-size: 14pt; }
  .prose {
    padding: 20px 40px;
    background: white;
    font-size: 11pt;
  }
  .prose h2 {
    page-break-before: always;
    font-size: 20pt;
    margin-top: 0;
    color: var(--color-cinnabar);
  }
  .prose h2:first-of-type { page-break-before: avoid; }
  .prose h3 {
    page-break-after: avoid;
    font-size: 15pt;
  }
  .prose h4 {
    page-break-after: avoid;
    font-size: 12pt;
  }
  .prose table, .prose pre {
    page-break-inside: avoid;
  }
  .prose pre {
    background: #f5f5f5;
    color: #333;
    border: 1px solid #ccc;
    font-size: 9pt;
  }
  .prose pre code { color: inherit; }
  .prose blockquote { background: #f8f5ee; }
  .prose a { color: var(--color-ink); border-bottom: none; }
  /* 页码 */
  @page {
    size: A4;
    margin: 18mm 16mm 22mm 16mm;
    @bottom-center {
      content: counter(page) " / " counter(pages);
      font-family: serif;
      font-size: 9pt;
      color: #888;
    }
    @top-right {
      content: "一心水晶 · 完整功能文档 v0.5";
      font-family: serif;
      font-size: 9pt;
      color: #888;
    }
  }
}