/* ==========================================================================
   SlowSprings · 慢泉 — 共享样式表
   首页与所有文章页共用，改这里 = 全站生效
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --bg: #faf9f6;
  --surface: #ffffff;
  --text: #2c2c2a;
  --text-muted: #5f5e5a;
  --text-hint: #888780;
  --accent: #0f6e56;
  --accent-light: #e1f5ee;
  --accent-dark: #085041;
  --border: #e5e3dc;
  --radius: 14px;
  --max-w: 960px;
  --read-w: 720px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

/* ---------- 导航 ---------- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  color: var(--accent-dark);
  text-decoration: none;
  letter-spacing: 0.5px;
}
.logo-img { width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0; }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14.5px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }
@media (max-width: 700px) {
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 13px; }
}
@media (max-width: 520px) {
  .nav-inner { padding: 12px 16px; }
  .nav-links { gap: 11px; }
  .nav-links a { font-size: 12.5px; }
  .logo span { display: none; }
}

/* ---------- 通用区块 ---------- */
section { max-width: var(--max-w); margin: 0 auto; padding: 72px 24px; }
section + section { border-top: 1px solid var(--border); }
.section-tag {
  display: inline-block;
  font-size: 12.5px;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.section-lead { color: var(--text-muted); max-width: 640px; margin: -10px 0 26px; font-size: 15px; }
h2 { font-size: 26px; font-weight: 600; margin-bottom: 24px; }
h2 .en { color: var(--text-hint); font-weight: 400; font-size: 15px; margin-left: 10px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { border: 1px solid var(--border); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 页脚 ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 30px 24px;
  text-align: center;
  color: var(--text-hint);
  font-size: 13px;
}
footer a { color: var(--text-muted); text-decoration: none; }
footer a:hover { color: var(--accent); }

/* ---------- 滚动淡入 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ==========================================================================
   文章页
   ========================================================================== */

.back-link {
  display: inline-block;
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 28px;
  transition: color 0.2s;
}
.back-link:hover { color: var(--accent); }

.article { max-width: var(--read-w); margin: 0 auto; padding: 52px 24px 84px; }
.article-head { margin-bottom: 38px; padding-bottom: 26px; border-bottom: 1px solid var(--border); }
.article-title { font-size: 31px; font-weight: 700; line-height: 1.35; letter-spacing: -0.3px; margin: 14px 0 16px; }
.article-meta { font-size: 13.5px; color: var(--text-hint); display: flex; gap: 10px; flex-wrap: wrap; }
@media (max-width: 600px) { .article { padding: 36px 20px 64px; } .article-title { font-size: 25px; } }

/* 正文排版 */
.prose { font-size: 17px; line-height: 1.85; color: var(--text); }
.prose p { margin-bottom: 1.45em; }
.prose h2 { font-size: 21px; font-weight: 600; margin: 2.3em 0 0.85em; color: var(--text); }
.prose h3 { font-size: 17.5px; font-weight: 600; margin: 1.9em 0 0.6em; color: var(--accent-dark); }
.prose ul, .prose ol { margin: 0 0 1.45em 1.35em; }
.prose li { margin-bottom: 0.5em; }
.prose strong { font-weight: 600; }
.prose a { color: var(--accent); }
.prose blockquote {
  border-left: 3px solid var(--accent);
  background: var(--accent-light);
  padding: 15px 22px;
  margin: 1.7em 0;
  border-radius: 0 10px 10px 0;
  color: var(--accent-dark);
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2.6em 0; }
.prose code {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 0.88em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.prose pre {
  background: #f4f3ef;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  margin-bottom: 1.6em;
}
.prose pre code { background: none; border: 0; padding: 0; }
.prose table { width: 100%; border-collapse: collapse; margin-bottom: 1.7em; font-size: 14.5px; }
.prose th, .prose td { border: 1px solid var(--border); padding: 9px 13px; text-align: left; }
.prose th { background: var(--accent-light); color: var(--accent-dark); font-weight: 600; }
.prose img { max-width: 100%; height: auto; border-radius: 10px; margin: 0.4em 0; }
.prose .muted { color: var(--text-hint); font-size: 14.5px; }

/* ==========================================================================
   归档列表页
   ========================================================================== */

.page-head { max-width: var(--max-w); margin: 0 auto; padding: 68px 24px 20px; }
.page-head h1 { font-size: 34px; font-weight: 700; letter-spacing: -0.4px; margin-bottom: 14px; }
.page-head .lead { color: var(--text-muted); max-width: 640px; font-size: 15.5px; }
@media (max-width: 600px) { .page-head { padding: 44px 20px 14px; } .page-head h1 { font-size: 27px; } }

.memo-list { display: flex; flex-direction: column; }
.memo-item {
  display: block;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s;
}
.memo-item:first-child { border-top: 1px solid var(--border); }
.memo-item:hover { opacity: 0.7; }
.memo-date { font-size: 12.5px; color: var(--text-hint); letter-spacing: 0.6px; margin-bottom: 7px; }
.memo-title { font-size: 19px; font-weight: 600; margin-bottom: 7px; }
.memo-desc { font-size: 14.5px; color: var(--text-muted); }
.empty-state { color: var(--text-hint); font-size: 15px; padding: 34px 0; }

/* Article extended styles — used by reading notes 004+ */
.article-sub {
  font-size: 16px;
  color: var(--text-hint);
  letter-spacing: 1.5px;
  margin-top: -16px;
  margin-bottom: 22px;
  font-weight: 400;
}
.quote-divider {
  border: none;
  border-top: 1px dashed var(--border);
  margin: 36px 0;
  position: relative;
}
.quote-divider::before {
  content: "❝  Qwen 总结引用  ❞";
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg);
  padding: 0 14px;
  font-size: 11px;
  color: var(--text-hint);
  letter-spacing: 2px;
}
.pull-quote {
  margin: 28px 0;
  padding: 18px 24px;
  border-left: 3px solid var(--accent);
  background: rgba(45, 90, 71, 0.05);
  border-radius: 0 6px 6px 0;
}
.pull-quote p {
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-main);
  margin: 0;
  font-style: italic;
}
.theory-table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 14px;
  background: #fafbfb;
  border-radius: 6px;
  overflow: hidden;
}
.theory-table thead {
  background: var(--accent);
  color: #fff;
}
.theory-table th, .theory-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.theory-table th { font-weight: 600; font-size: 13px; letter-spacing: 0.3px; }
.theory-table tr:last-child td { border-bottom: none; }
.theory-table tbody tr:hover { background: #f0f4f1; }
@media (max-width: 640px) {
  .theory-table { font-size: 13px; }
  .theory-table th, .theory-table td { padding: 9px 10px; }
}

/* v5 — 彼得·蒂尔传: numbered "feelings" list */
ol.feelings {
  counter-reset: feeling;
  list-style: none;
  padding: 0;
  margin: 22px 0;
}
ol.feelings > li {
  position: relative;
  padding: 14px 18px 14px 56px;
  margin-bottom: 14px;
  background: #fafbfb;
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  counter-increment: feeling;
}
ol.feelings > li::before {
  content: counter(feeling);
  position: absolute;
  left: 14px;
  top: 12px;
  width: 30px;
  height: 30px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
}
ol.feelings > li strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15.5px;
  color: var(--text-main);
}

/* v6 — So Far So Good: numbered "principles" list (slightly different from .feelings) */
ol.principles {
  counter-reset: principle;
  list-style: none;
  padding: 0;
  margin: 22px 0;
}
ol.principles > li {
  position: relative;
  padding: 13px 18px 13px 64px;
  margin-bottom: 10px;
  background: #fafbfb;
  border-bottom: 1px solid var(--border);
  counter-increment: principle;
}
ol.principles > li::before {
  content: counter(principle, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 12px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 13px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.5px;
}
ol.principles > li strong {
  color: var(--text-main);
  margin-right: 4px;
}
ol.principles > li {
  font-size: 14.5px;
  color: var(--text-muted);
}
.principles-note {
  margin-top: 14px;
  padding: 12px 16px;
  background: rgba(45, 90, 71, 0.06);
  border-left: 3px solid var(--accent);
  font-size: 14.5px;
  color: var(--text-muted);
  border-radius: 0 4px 4px 0;
}

/* v7 — 投资备忘配图（地产链系列） */
.article-figure {
  margin: 26px 0;
}
.article-figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}
.article-figure figcaption {
  margin-top: 9px;
  font-size: 13.5px;
  color: var(--text-hint);
  line-height: 1.7;
}
@media (max-width: 640px) {
  .article-figure { margin: 20px 0; }
  .article-figure figcaption { font-size: 12.5px; }
}