/* allinlance.com — "现代独立写作者站"风格
 * 综合参考:The Marginalian 气质 + Stratechery/Aeon 排版 + Mnml/Edger 现代衬线 + ACX 极简
 * 设计原则:无 CDN · 系统字体优先 · prefers-color-scheme 自动适配 · 内容压倒视觉
 */

:root {
  /* 现代米白 + 暖橙 — 不要老玫瑰,不要 Substack 灰白 */
  --bg: #fbfaf7;
  --bg-card: #ffffff;
  --text: #1c1917;
  --text-muted: #57534e;
  --text-faint: #a8a29e;
  --accent: #c2410c;
  --accent-soft: #ea580c;
  --accent-bg: #fef3ec;
  --rule: #e7e5e0;
  --code-bg: #f5f3ee;
  --max-w: 680px;

  /* 字体栈:衬线标题(现代衬线优先) + 无衬线正文 */
  --serif: "Newsreader", "Source Serif Pro", "Source Serif 4", "Iowan Old Style", "Charter", "Georgia", "Songti SC", "Source Han Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --bg-card: #292524;
    --text: #f5f5f4;
    --text-muted: #a8a29e;
    --text-faint: #78716c;
    --accent: #fb923c;
    --accent-soft: #fdba74;
    --accent-bg: #2a1d12;
    --rule: #44403c;
    --code-bg: #292524;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 18px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern", "liga", "ss01";
}

::selection { background: var(--accent-bg); color: var(--accent); }

/* === Layout === */
.container { max-width: var(--max-w); margin: 0 auto; padding: 40px 24px; }

/* === Site nav === */
.site-nav {
  border-bottom: 1px solid var(--rule);
  padding: 22px 24px;
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
}
.site-nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.site-nav .brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}
.site-nav .brand img {
  display: block;
  width: 188px;
  height: auto;
}
.site-nav .links {
  font-size: 0.92rem;
  font-weight: 500;
}
.site-nav .links a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 24px;
  transition: color 0.15s;
}
.site-nav .links a:hover { color: var(--accent); }

/* === Typography === */
h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--text);
  letter-spacing: -0.022em;
  line-height: 1.22;
  font-weight: 600;
}
h1 {
  font-size: 2.6rem;
  margin: 0 0 0.35em;
  letter-spacing: -0.028em;
  font-weight: 600;
}
h2 {
  font-size: 1.55rem;
  margin: 2.4em 0 0.6em;
  letter-spacing: -0.02em;
}
h3 {
  font-size: 1.2rem;
  margin: 1.8em 0 0.4em;
  font-weight: 600;
}
h4 {
  font-size: 1rem;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 1.4em 0 0.5em;
  font-weight: 600;
}

p { margin: 0 0 1.2em; }
strong { font-weight: 600; color: var(--text); }
em { font-style: italic; }
a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(194, 65, 12, 0.35);
  text-underline-offset: 4px;
  transition: text-decoration-color 0.15s;
}
a:hover { text-decoration-color: var(--accent); }

ul, ol { margin: 0 0 1.2em; padding-left: 1.4em; }
li { margin: 0.4em 0; }
li::marker { color: var(--text-faint); }

blockquote {
  border-left: 3px solid var(--accent);
  margin: 1.8em 0;
  padding: 0.4em 1.4em;
  color: var(--text-muted);
  font-style: italic;
  font-family: var(--serif);
  font-size: 1.08em;
  line-height: 1.65;
}
blockquote p:last-child { margin-bottom: 0; }
blockquote cite {
  display: block;
  margin-top: 0.6em;
  font-size: 0.82em;
  color: var(--text-faint);
  font-style: normal;
  font-family: var(--sans);
}

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  border: 1px solid var(--rule);
}
pre code { background: transparent; border: 0; padding: 0; }
pre {
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 14px 18px;
  overflow-x: auto;
  font-size: 0.88em;
  margin: 1.5em 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3em 0;
}

/* === Hero — mobile-first portrait editorial image with overlay text === */
.hero--full {
  position: relative;
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  max-width: 100%;
  background: linear-gradient(180deg, #1c1f3d 0%, #d97a4d 100%);
}
@media (min-width: 720px) {
  .hero--full {
    max-width: 640px;
    aspect-ratio: 4 / 5;
    margin: 32px auto 0;
    border-radius: 6px;
  }
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(0deg, rgba(28, 31, 61, 0.6) 0%, rgba(28, 31, 61, 0.18) 35%, rgba(28, 31, 61, 0) 60%);
}
.hero-overlay h1 {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 5.5vw, 2.2rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: #fbfaf7;
  margin: 0 0 0.5em;
  font-weight: 600;
  text-shadow: 0 1px 24px rgba(0, 0, 0, 0.45);
}
.hero-overlay .lede {
  font-family: var(--serif);
  font-size: clamp(0.95rem, 3.5vw, 1.05rem);
  line-height: 1.5;
  color: rgba(251, 250, 247, 0.94);
  font-weight: 400;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.45);
}

/* === Intro under hero === */
.intro {
  margin: 3em 0 2.5em;
  padding-top: 0.5em;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2.5em;
}
.intro p {
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 580px;
  font-style: italic;
}

/* === Section === */
section { margin: 3em 0; }
section h2 { font-size: 1.4rem; margin-top: 0; }

/* === Avatar === */
.avatar {
  display: inline-block;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 10px;
}
.avatar.large { width: 64px; height: 64px; margin-right: 14px; }

/* === Article page === */
.article-hero {
  width: 100%;
  max-width: 680px;
  margin: 32px auto 0;
  padding: 0 24px;
}
.article-hero img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 6px;
  background: #1c1f3d;
  box-shadow: 0 4px 24px rgba(28, 25, 23, 0.08);
}
@media (max-width: 640px) {
  .article-hero { padding: 0; margin-top: 0; }
  .article-hero img { border-radius: 0; }
}

.article-container {
  max-width: 680px;
  padding: 48px 24px 60px;
}

.article-header {
  margin-bottom: 2.4em;
  padding-bottom: 1.6em;
  border-bottom: 1px solid var(--rule);
}
.article-category {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.6em;
}
.article-header h1 {
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin: 0 0 0.7em;
  font-weight: 600;
}

.article-lede {
  border-left: none;
  padding: 0;
  margin: 0 0 2.4em;
  font-style: normal;
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--text);
}
.article-lede p { margin: 0 0 0.8em; }
.article-lede p:last-child { margin-bottom: 0; }

.article-pullquote {
  border-left: 3px solid var(--accent);
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.5;
  font-style: italic;
  color: var(--text);
  margin: 2em 0;
  padding: 0.4em 1.4em;
}

@media (max-width: 640px) {
  .article-container { padding: 32px 22px 48px; }
  .article-header { margin-bottom: 1.8em; padding-bottom: 1.2em; }
  .article-lede { font-size: 1.08rem; }
  .article-pullquote { font-size: 1.08rem; padding: 0.3em 1.1em; }
}

/* === Article meta === */
.article-meta {
  font-family: var(--sans);
  font-size: 0.86rem;
  color: var(--text-muted);
  margin: -0.4em 0 2.4em;
  padding-bottom: 1.4em;
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  align-items: center;
}
.article-meta .author {
  color: var(--text);
  font-weight: 500;
}
.article-meta time { color: var(--text-muted); }
.article-meta .sep { color: var(--text-faint); }
.article-meta .reading-time { color: var(--text-muted); }
.article-meta .reading-time::before { content: "·"; color: var(--text-faint); margin-right: 16px; }

/* === Article TOC === */
.article-toc {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  padding: 18px 24px;
  margin: 2.4em 0;
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.92rem;
}
.article-toc h4 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin: 0 0 0.7em;
  font-weight: 600;
}
.article-toc ol {
  padding-left: 1.4em;
  margin: 0;
}
.article-toc li { margin: 0.3em 0; }
.article-toc a {
  color: var(--text-muted);
  text-decoration: none;
}
.article-toc a:hover { color: var(--accent); }

/* === Article body === */
.article-body { font-size: 1.08rem; line-height: 1.78; }
.article-body p { margin-bottom: 1.3em; }
.article-body h2:first-child { margin-top: 0; }

/* === References === */
.references {
  margin-top: 3.5em;
  padding-top: 2em;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.92rem;
}
.references h2 {
  font-family: var(--sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 1.2em;
  color: var(--text-muted);
  font-weight: 600;
}
.references ol {
  padding-left: 1.4em;
}
.references li {
  margin: 0.7em 0;
  color: var(--text-muted);
  line-height: 1.55;
}
.references li a { color: var(--text); }

/* === Disclaimer === */
.disclaimer {
  margin: 3em 0 0;
  padding: 18px 24px;
  background: var(--accent-bg);
  border-radius: 6px;
  font-family: var(--sans);
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.disclaimer strong { color: var(--text); }

/* === Article list — image-on-top (Marginalian style) === */
.article-list { list-style: none; padding: 0; margin: 2.4em 0 0; }
.article-list > li {
  margin-bottom: 3.5em;
  padding-bottom: 3.5em;
  border-bottom: 1px solid var(--rule);
  display: block;
}
.article-list > li:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}
.article-list .thumb {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  margin-bottom: 1.4em;
  overflow: hidden;
  border-radius: 6px;
  background: #1c1f3d;
  box-shadow: 0 2px 12px rgba(28, 25, 23, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.article-list a.thumb:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(28, 25, 23, 0.12);
}
.article-list .thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.article-list h3 {
  font-family: var(--serif);
  font-size: 1.6rem;
  margin: 0 0 0.5em;
  letter-spacing: -0.02em;
  font-weight: 600;
  line-height: 1.2;
}
.article-list h3 a {
  color: var(--text);
  text-decoration: none;
}
.article-list h3 a:hover { color: var(--accent); }
.article-list h3.draft { color: var(--text-faint); }
.article-list .excerpt {
  font-size: 0.98rem;
  color: var(--text-muted);
  margin: 0.5em 0 0.6em;
  line-height: 1.6;
}
.article-list .meta {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

/* === Upcoming essays section (blog list) === */
.upcoming {
  margin-top: 4em;
  padding-top: 2.5em;
  border-top: 1px solid var(--rule);
}
.upcoming h2 {
  font-family: var(--serif);
  font-size: 1.45rem;
  margin: 0 0 0.4em;
  font-weight: 600;
}
.upcoming-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: upcoming;
}
.upcoming-list > li {
  counter-increment: upcoming;
  padding: 1.2em 0;
  border-bottom: 1px dashed var(--rule);
  position: relative;
  padding-left: 3em;
}
.upcoming-list > li:last-child { border-bottom: 0; }
.upcoming-list > li::before {
  content: counter(upcoming, upper-roman) ".";
  position: absolute;
  left: 0;
  top: 1.4em;
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--text-faint);
  font-weight: 600;
}
.upcoming-list h4 {
  font-family: var(--serif);
  font-size: 1.15rem;
  margin: 0 0 0.3em;
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.upcoming-list p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}

/* === Footer === */
.site-foot {
  border-top: 1px solid var(--rule);
  margin-top: 5em;
  padding: 32px 24px 48px;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--text-faint);
  text-align: center;
}
.site-foot a {
  color: var(--text-muted);
  text-decoration: none;
  margin: 0 12px;
}
.site-foot a:hover { color: var(--accent); }
.site-foot .copy { margin-top: 16px; }

/* === Responsive === */
@media (max-width: 640px) {
  html { font-size: 17px; }
  .container { padding: 28px 20px; }
  h1 { font-size: 2rem; }
  /* hero--full mobile spec already handled in main rule (aspect 4/5 + bottom gradient) */
  .intro { margin: 2em 0 2em; padding-bottom: 1.8em; }
  .intro p { font-size: 1.04rem; }
  .article-meta { gap: 4px 12px; font-size: 0.82rem; }
  .site-nav { padding: 16px 20px; }
  .site-nav-inner { gap: 16px; }
  .site-nav .brand img { width: 156px; }
  .site-nav .links a { margin-left: 18px; }
  .article-body { font-size: 1.02rem; }
  .article-list > li { margin-bottom: 2.8em; padding-bottom: 2.8em; }
  .article-list .thumb { margin-bottom: 1.1em; border-radius: 4px; }
  .article-list h3 { font-size: 1.35rem; }
}