/* ============================================================
   喻小子的成长 · 文章页样式（与首页同一设计体系）
   Mobile-first: base ~375px → ≥768px → ≥1200px
   ============================================================ */
:root {
  --paper: #F5F6F1;
  --card: #FFFFFF;
  --ink: #1F2D28;
  --ink-soft: #56655F;
  --green-950: #0B2E27;
  --green-900: #123F36;
  --green-700: #1A5C52;
  --green-600: #217263;
  --green-tint: #E7EFE9;
  --line: #D7E2DA;
  --line-dark: rgba(255, 255, 255, 0.16);
  --dark-dim: #9DB8AE;
  --orange: #F0912B;
  --orange-deep: #D97C1F;
  --orange-tint: #FCEEDC;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
  --nav-h: 56px;
}

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

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--green-700); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 4px; }

img { display: block; }

:focus-visible {
  outline: 2px solid var(--green-700);
  outline-offset: 2px;
  border-radius: 2px;
}

.container { width: 100%; padding-inline: 18px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 246, 241, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 9px;
  min-height: var(--nav-h);
}
.nav-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  min-width: 0;
}
.nav-lockup:hover { text-decoration: none; }
.nav-lockup img { width: 36px; height: 36px; border-radius: 50%; flex: none; }
.nav-wordmark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
}
.nav-wordmark small {
  display: block;
  font-family: var(--mono);
  font-weight: 400;
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  margin-top: 2px;
  white-space: nowrap;
}
.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--green-700);
  border: 1px solid var(--line);
  background: var(--card);
  padding: 7px 14px;
  border-radius: 999px;
  flex: none;
  transition: border-color 0.15s ease;
}
.nav-back:hover { text-decoration: none; border-color: var(--green-600); }
.nav-back svg { width: 15px; height: 15px; }

/* ---------- 文章头部 ---------- */
main { padding-block: 26px 8px; }
.aa-head { text-align: center; max-width: 720px; margin: 0 auto 22px; }
.kicker {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--orange-deep);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.aa-head h1 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 25px;
  line-height: 1.38;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-wrap: balance;
}
.aa-meta {
  margin-top: 12px;
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}

/* ---------- 文章主体 ---------- */
.aa-body { max-width: 720px; margin: 0 auto; }

.aa-lead {
  background: var(--green-tint);
  border-left: 3px solid var(--green-600);
  border-radius: 0 10px 10px 0;
  padding: 16px 18px;
  margin-bottom: 26px;
}
.aa-lead-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--green-700);
  margin-bottom: 6px;
}
.aa-lead p:last-child {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.75;
  color: var(--green-900);
}

.aa-sec { margin-bottom: 28px; }
.aa-h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

/* 关键数字卡 */
.aa-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.aa-stat {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.aa-stat .n {
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 500;
  color: var(--green-700);
  letter-spacing: 0.01em;
}
.aa-stat .l { font-size: 12.5px; color: var(--ink-soft); }

/* 正文段落（全文版） */
.aa-prose { display: flex; flex-direction: column; gap: 18px; margin-bottom: 26px; }
.aa-prose h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 17.5px;
  line-height: 1.5;
  color: var(--ink);
  margin-top: 10px;
  padding-left: 12px;
  border-left: 3px solid var(--orange);
}
.aa-prose h3 .no {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--orange-deep);
  margin-right: 8px;
  letter-spacing: 0.08em;
}
.aa-prose p { font-size: 15.5px; line-height: 1.85; color: var(--ink); }
.aa-prose p strong { color: var(--green-900); }
.aa-prose ul, .aa-prose ol { padding-left: 20px; display: flex; flex-direction: column; gap: 8px; }
.aa-prose li { font-size: 15px; line-height: 1.75; }
.aa-note {
  background: var(--orange-tint);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}
.aa-note .nb {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--orange-deep);
  display: block;
  margin-bottom: 6px;
}
.aa-src {
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.7;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
  margin-top: 4px;
}

/* 术语速查 */
.aa-terms { display: flex; flex-direction: column; gap: 10px; }
.aa-term {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 16px;
}
.aa-term dt {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--orange-deep);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.aa-term dd { font-size: 14px; color: var(--ink); line-height: 1.72; }

/* 文末关注卡 */
.aa-tail {
  background: var(--green-950);
  border-radius: 14px;
  padding: 22px 20px;
  margin: 30px 0 28px;
  color: var(--dark-dim);
}
.aa-tail-top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: 16px;
}
.aa-tail-top img { width: 44px; height: 44px; border-radius: 50%; flex: none; }
.aa-tail-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 17px;
  color: #FFFFFF;
  letter-spacing: 0.03em;
}
.aa-tail-line { font-size: 12px; color: var(--dark-dim); margin-top: 2px; }
.aa-tail-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}
.aa-tail-cta .creed { font-size: 13px; line-height: 1.8; color: #DCE9E1; }
.aa-tail-cta .creed strong { color: var(--orange); font-weight: 500; }


/* 文末承接：二维码随行 */
.aa-tail-cta img.qr {
  width: min(100%, 340px);
  height: auto;
  border-radius: 10px;
  flex: none;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--orange);
  color: var(--green-950);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  padding: 11px 22px;
  border: 1px solid var(--orange);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--orange-deep); text-decoration: none; }

/* 相关阅读 */
.aa-related { display: grid; grid-template-columns: 1fr; gap: 10px; }
.aa-rel {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.aa-rel:hover { text-decoration: none; border-color: var(--green-600); transform: translateY(-1px); }
.aa-rel .cat {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--orange-deep);
}
.aa-rel .t {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--ink);
  line-height: 1.45;
}
.aa-rel .d {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 上一篇/下一篇 */
.aa-pn-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 28px;
}
.aa-pn {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  padding: 13px 16px;
  transition: border-color 0.15s ease;
}
.aa-pn:hover { text-decoration: none; border-color: var(--green-600); }
.aa-pn .lbl {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}
.aa-pn .t {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 14.5px;
  color: var(--green-700);
  line-height: 1.45;
}

/* ---------- Footer ---------- */
footer { background: var(--green-950); color: var(--dark-dim); margin-top: 34px; }
.foot-inner {
  padding-block: 44px 34px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
}
.foot-lockup { display: flex; align-items: center; gap: 12px; color: #FFFFFF; }
.foot-lockup img { width: 32px; height: 32px; border-radius: 50%; }
.foot-lockup span { font-family: var(--serif); font-weight: 700; font-size: 16px; letter-spacing: 0.03em; }
.foot-creed {
  font-size: 13px;
  color: #DCE9E1;
  border-block: 1px solid var(--line-dark);
  padding-block: 12px;
  width: 100%;
  letter-spacing: 0.01em;
  text-wrap: balance;
}
.foot-creed strong { color: var(--orange); font-weight: 500; }
.foot-meta { font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; line-height: 2; }

/* ============================================================
   Tablet ≥768px
   ============================================================ */
@media (min-width: 768px) {
  body { font-size: 16px; }
  .container { max-width: 1120px; margin-inline: auto; padding-inline: 24px; }
  .nav-lockup img { width: 38px; height: 38px; }
  .nav-wordmark { font-size: 18px; }
  .aa-head h1 { font-size: 30px; }
  .aa-stats { grid-template-columns: repeat(3, 1fr); }
  .aa-related { grid-template-columns: repeat(2, 1fr); }
  .aa-pn-grid { grid-template-columns: repeat(2, 1fr); }
  .aa-tail-cta { flex-direction: row; align-items: center; justify-content: space-between; }
  .aa-h2 { font-size: 20px; }
}

/* ============================================================
   Desktop ≥1200px
   ============================================================ */
@media (min-width: 1200px) {
  .aa-head h1 { font-size: 32px; }
  .aa-body { padding-inline: 0; }
}

/* ---- 横向溢出保险丝（任何元素不得把页面撑出屏幕） ---- */
html, body { max-width: 100%; overflow-x: clip; }
img, svg, video { max-width: 100%; }
.aa-prose p, .aa-note, .aa-lead, .aa-stat, .aa-term { overflow-wrap: break-word; }