/* ============================================
   谢思源 · 博客样式
   纸质暖白 + 砖红点缀 + 衬线标题
   ============================================ */

:root{
  /* 纸与墨 */
  --paper:      #faf9f6;
  --ink:        #1f1e1b;
  --ink-soft:   #6b6862;
  --ink-faint:  #9a968e;
  --line:       #e4e0d8;
  --accent:     #9c4221;
  --mark:       #f0e6d2;
  --code-bg:    #f4f1ea;

  --serif: Georgia, "Times New Roman", "Songti SC", "STSong", "SimSun", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono:  ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* 深色模式：暖黑，不是死黑 */
@media (prefers-color-scheme: dark){
  :root{
    --paper:     #171715;
    --ink:       #e6e2d9;
    --ink-soft:  #a09b90;
    --ink-faint: #6e6a61;
    --line:      #302d27;
    --accent:    #d68b5e;
    --mark:      #332a1c;
    --code-bg:   #211f1b;
  }
}

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

body{
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
  padding-bottom: 40px;
  -webkit-text-size-adjust: 100%;
}

::selection{ background: var(--mark); color: var(--ink); }

.wrap{ max-width: 640px; margin: 0 auto; padding: 0 22px; }
a{ color: var(--accent); text-decoration: none; }

/* ============================================
   顶部导航 —— 一条细线，不做色块
   ============================================ */
.site-header{
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .wrap{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 14px;
  gap: 14px;
}
.logo{
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .02em;
}
.logo:hover{ color: var(--accent); text-decoration: none; }
.site-header nav{ display: flex; gap: 16px; }
.site-header nav a{
  color: var(--ink-soft);
  font-size: 14px;
}
.site-header nav a:hover{ color: var(--accent); }

.main{ padding-top: 44px; }

/* ============================================
   首页头部
   ============================================ */
.intro{ margin-bottom: 52px; }
.sitename{
  font-family: var(--serif);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .03em;
  margin-bottom: 10px;
}
.tagline{
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: .06em;
  margin-bottom: 20px;
}
.bio{
  color: var(--ink-soft);
  font-size: 15px;
  max-width: 460px;
}
.bio strong{ color: var(--ink); font-weight: 600; }

/* ============================================
   小节标题
   ============================================ */
.sec-title{
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

/* ============================================
   文章列表 —— 细线分隔，不用卡片
   ============================================ */
.post-list{ list-style: none; }
.post-list li{
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.post-list li:last-child{ border-bottom: none; }

.pl-meta{
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: .08em;
  margin-bottom: 6px;
}
.pl-title{
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  display: block;
}
.pl-title:hover{ color: var(--accent); text-decoration: none; }
.pl-excerpt{
  color: var(--ink-soft);
  font-size: 14px;
  margin-top: 6px;
  line-height: 1.7;
}

.empty{
  color: var(--ink-faint);
  font-size: 14px;
  padding: 30px 0;
  font-style: italic;
}

/* ============================================
   文章正文
   ============================================ */
.post-head{ margin-bottom: 34px; }
.post-head h1{
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .02em;
  margin-bottom: 12px;
}
.post-meta{
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: .08em;
}
.post-meta .cat{
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 6px;
  margin-left: 8px;
}

.post-body{ font-size: 16px; }

/* 首字下沉 */
.post-body > p:first-of-type::first-letter{
  font-family: var(--serif);
  font-size: 3.1em;
  font-weight: 700;
  float: left;
  line-height: .92;
  margin: .06em .12em 0 0;
  color: var(--accent);
}

.post-body h2{
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  margin: 40px 0 14px;
  letter-spacing: .02em;
}
.post-body h3{
  font-size: 17px;
  font-weight: 700;
  margin: 28px 0 10px;
}
.post-body p{ margin-bottom: 1.15em; }
.post-body ul, .post-body ol{ margin: 0 0 1.15em 1.4em; }
.post-body li{ margin-bottom: .4em; }
.post-body strong{ font-weight: 700; color: var(--ink); }

.post-body a{
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.post-body a:hover{ background: var(--mark); }

/* 引用：竖线 + 斜体，不用色块 */
.post-body blockquote{
  border-left: 2px solid var(--accent);
  padding: 2px 0 2px 16px;
  margin: 0 0 1.3em;
  color: var(--ink-soft);
  font-style: italic;
}
.post-body blockquote p:last-child{ margin-bottom: 0; }

/* 分隔线：三个点 */
.post-body hr{
  border: 0;
  margin: 38px 0;
  text-align: center;
}
.post-body hr::after{
  content: "· · ·";
  display: block;
  color: var(--ink-faint);
  letter-spacing: .7em;
  font-size: 13px;
}

/* 行内代码 */
.post-body code{
  font-family: var(--mono);
  font-size: .87em;
  background: var(--code-bg);
  padding: .12em .4em;
  border-radius: 3px;
  word-break: break-all;
}
/* 代码块 */
.post-body pre{
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 14px 16px;
  overflow-x: auto;
  margin-bottom: 1.3em;
  -webkit-overflow-scrolling: touch;
}
.post-body pre code{ background: none; padding: 0; font-size: 13px; }

.post-body img{
  max-width: 100%;
  height: auto;
  border-radius: 3px;
  margin: 10px 0;
}
.post-body table{
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.3em;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}
.post-body th, .post-body td{
  border: 1px solid var(--line);
  padding: 7px 10px;
  text-align: left;
}
.post-body th{ background: var(--code-bg); }

/* ============================================
   上下篇
   ============================================ */
.post-nav{
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 44px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  flex-wrap: wrap;
}
.post-nav a{ flex: 1; min-width: 130px; color: var(--ink-soft); }
.post-nav a:hover{ color: var(--accent); }
.post-nav .next{ text-align: right; }

/* ============================================
   评论区
   ============================================ */
.comments{
  margin-top: 52px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.comments h2{
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 20px;
}

/* ============================================
   页脚
   ============================================ */
.site-footer{
  margin-top: 60px;
  border-top: 1px solid var(--line);
  padding: 26px 0 0;
}
.site-footer .wrap{
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: .05em;
}
.site-footer .sig{
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: .02em;
  font-style: italic;
}

/* ============================================
   手机微调
   ============================================ */
@media (max-width: 480px){
  body{ font-size: 15.5px; }
  .wrap{ padding: 0 18px; }
  .sitename{ font-size: 29px; }
  .post-head h1{ font-size: 24px; }
  .pl-title{ font-size: 18px; }
  .post-body > p:first-of-type::first-letter{ font-size: 2.8em; }
  .site-header nav{ gap: 13px; }
}