/* 翻墙安全手册 — hand-written, framework-free. Deliberately shares NO class
   vocabulary or palette with any sibling site (editorial "handbook" identity:
   warm paper, serif headings, terracotta accent, directory URLs). */
:root {
  --ink: #24201b;
  --body: #37322b;
  --soft-ink: #6b6156;
  --paper: #faf7f2;
  --panel: #f2ece2;
  --line: #e4dccd;
  --brand: #b5533e;
  --brand-deep: #8f3d2d;
  --brand-wash: #f7e8e1;
  --safe: #4a7a3f;
  --warn: #9a5b00;
  --danger: #a33227;
  --danger-wash: #f8e7e3;
  --measure: 760px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--body);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 17px;
  line-height: 1.78;
}
h1, h2, h3 {
  font-family: Georgia, "Times New Roman", "Noto Serif SC", "Songti SC", serif;
  color: var(--ink);
  line-height: 1.35;
  font-weight: 700;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-deep); text-decoration: underline; }
.page { max-width: var(--measure); margin: 0 auto; padding: 0 20px; }

/* masthead */
.masthead { border-bottom: 2px solid var(--ink); background: var(--paper); }
.masthead .page {
  display: flex; align-items: baseline; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px; gap: 14px; flex-wrap: wrap;
}
.brandmark {
  font-family: Georgia, "Noto Serif SC", "Songti SC", serif;
  font-weight: 700; font-size: 19px; color: var(--ink); letter-spacing: .01em;
}
.masthead nav a { margin-left: 18px; font-size: 15px; color: var(--soft-ink); }
.masthead nav a:hover { color: var(--brand); text-decoration: none; }

/* breadcrumb + intro */
.crumbs { font-size: 13.5px; color: var(--soft-ink); padding: 18px 0 0; }
.crumbs a { color: var(--soft-ink); }
main .page > h1 { font-size: 31px; margin: 14px 0 10px; }
.lede { font-size: 19px; color: var(--soft-ink); margin: 0 0 8px; }
.stamp { font-size: 13px; color: var(--soft-ink); margin: 6px 0 4px; }

/* chapters */
.chapter { padding: 26px 0; border-top: 1px solid var(--line); }
.chapter:first-of-type { border-top: none; }
.chapter h2 { font-size: 23px; margin: 4px 0 12px; padding-left: 13px; border-left: 4px solid var(--brand); }
.chapter h3 { font-size: 18px; margin: 20px 0 6px; }
.chapter p, .chapter li { margin: 10px 0; }

/* ordered walkthrough */
.walk { counter-reset: step; list-style: none; padding: 0; margin: 14px 0; }
.walk > li {
  counter-increment: step; position: relative;
  padding: 4px 0 12px 44px; margin: 0;
}
.walk > li::before {
  content: counter(step); position: absolute; left: 0; top: 2px;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--brand-wash); color: var(--brand-deep);
  font-weight: 700; font-size: 15px; text-align: center; line-height: 30px;
  font-family: Georgia, serif;
}

/* one-app recommendation panel */
.pick {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 20px 22px; margin: 18px 0;
}
.pick h3 { margin-top: 0; }
.pick ul { margin: 10px 0; padding-left: 20px; }
.cta-link {
  display: inline-block; margin-top: 8px;
  background: var(--brand); color: #fff; font-weight: 600;
  padding: 11px 22px; border-radius: 8px; border: 1px solid var(--brand);
}
.cta-link:hover { background: var(--brand-deep); border-color: var(--brand-deep); color: #fff; text-decoration: none; }

/* asides / notices */
.aside {
  background: var(--panel); border-left: 4px solid var(--soft-ink);
  border-radius: 0 8px 8px 0; padding: 12px 18px; margin: 16px 0; font-size: 15.5px;
}
.aside--safe { border-left-color: var(--safe); }
.aside--warn { border-left-color: var(--warn); background: #f8f1e2; }
.aside--danger { border-left-color: var(--danger); background: var(--danger-wash); }
.aside strong { color: var(--ink); }

/* citable stat */
.cite { font-size: 14.5px; color: var(--soft-ink); border-top: 1px dotted var(--line); padding-top: 10px; margin-top: 18px; }

/* FAQ */
.qa { border: 1px solid var(--line); border-radius: 10px; padding: 2px 18px; margin: 10px 0; background: #fff; }
.qa summary { cursor: pointer; font-weight: 600; padding: 12px 0; color: var(--ink); list-style-position: inside; }
.qa summary::-webkit-details-marker { color: var(--brand); }
.qa p { margin: 2px 0 14px; color: var(--body); }

/* table of contents (index) */
.toc { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 22px; margin: 18px 0; }
.toc ol { margin: 6px 0; padding-left: 22px; }
.toc li { margin: 7px 0; }
.toc .toc-note { color: var(--soft-ink); font-size: 14px; }

/* within-site further reading */
.next { border-top: 1px solid var(--line); margin-top: 24px; padding-top: 16px; font-size: 15px; }
.next a { margin-right: 6px; }

/* footer */
.pagefoot {
  border-top: 2px solid var(--ink); margin-top: 34px; padding: 22px 0 46px;
  font-size: 14px; color: var(--soft-ink);
}
.pagefoot a { color: var(--soft-ink); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  main .page > h1 { font-size: 26px; }
  .masthead nav a { margin-left: 0; margin-right: 16px; }
  .masthead nav { margin-top: 4px; }
}