/* =========================================================
   Ink · 水墨扁平主题
   宣纸底 · 墨色字 · 朱砂点缀 · 衬线中文
   ========================================================= */

:root {
  color-scheme: light;
  --paper: #f5f2e9;          /* 宣纸 */
  --card: #fbf9f2;           /* 纸面 */
  --ink: #26241f;            /* 浓墨 */
  --ink-soft: #4b463c;       /* 淡墨 */
  --ink-muted: #8c8675;      /* 枯墨 */
  --line: #dcd4c0;           /* 细墨线 */
  --line-strong: #b7ad93;    /* 稍浓 */
  --seal: #a63b2a;           /* 朱砂 */
  --seal-deep: #8c2f20;
  --code-bg: #24241f;
  --code-text: #e7e1d0;
  --code-gutter: #6d685a;
  --highlight: #efece0;      /* 引用 / 提示块底色 */
  --source-bg: #ffffff;      /* 图片衬底 */
  --header-bg: rgba(251, 249, 242, 0.94);
  --watermark: rgba(38, 36, 31, 0.05);
  --serif: "STZhongsong", "华文中宋", "Songti SC", "Noto Serif CJK SC",
           "Source Han Serif SC", "SimSun", "STSong", Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- 夜间 / 水墨夜 ---------- */
[data-theme="dark"] {
  color-scheme: dark;
  --paper: #141311;
  --card: #231d15;
  --ink: #ebe3d3;
  --ink-soft: #c9c0ad;
  --ink-muted: #938972;
  --line: #3c3527;
  --line-strong: #564b36;
  --seal: #c8503a;
  --seal-deep: #b0402e;
  --code-bg: #100f0d;
  --code-text: #d8d4c7;
  --code-gutter: #6e6a5d;
  --highlight: #2d2619;
  --source-bg: #141311;
  --header-bg: rgba(20, 19, 17, 0.9);
  --watermark: rgba(235, 227, 211, 0.05);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

html { background: var(--paper); }

body {
  margin: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

::selection { background: var(--seal); color: #ffffff; }

/* ---------- 水墨背景（高斯模糊融合） ---------- */
.site-bg {
  position: fixed;
  inset: -40px;
  z-index: -1;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  filter: blur(var(--bg-blur)) saturate(var(--bg-saturate));
  transform: scale(1.06);
  opacity: var(--bg-opacity);
  pointer-events: none;
}

.site-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(245, 242, 233, 0.2),
    rgba(245, 242, 233, 0.5) 45%,
    rgba(245, 242, 233, 0.84)
  );
}

[data-theme="dark"] .site-bg {
  --bg-opacity: var(--bg-dark-opacity, 0.55);
  animation: starShimmer 9s ease-in-out infinite;
}

@keyframes starShimmer {
  0%, 100% { filter: blur(var(--bg-blur)) saturate(var(--bg-saturate)) brightness(1); }
  50% { filter: blur(var(--bg-blur)) saturate(var(--bg-saturate)) brightness(1.16); }
}

[data-theme="dark"] .site-bg::after {
  background: linear-gradient(
    180deg,
    rgba(20, 19, 17, 0.12),
    rgba(20, 19, 17, 0.38) 45%,
    rgba(20, 19, 17, 0.62)
  );
}

/* ---------- 夜空星光轻闪（仅夜间） ---------- */
.site-stars {
  position: fixed;
  inset: -60px;
  z-index: -1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}

[data-theme="dark"] .site-stars { opacity: 0.9; }

.site-stars,
.site-stars::before,
.site-stars::after {
  background-repeat: repeat;
}

.site-stars {
  animation: twinkle 7s ease-in-out infinite;
}

.site-stars::before,
.site-stars::after {
  content: "";
  position: absolute;
  inset: 0;
}

.site-stars::before {
  animation: twinkle 11s ease-in-out 1.4s infinite;
}

.site-stars::after {
  animation: twinkle 9s ease-in-out 3s infinite;
}

/* 三组不同位置的星点，错开闪烁 */
.site-stars {
  background-image:
    radial-gradient(circle at 30px 40px, rgba(255,255,255,0.9) 0 1.1px, transparent 1.8px),
    radial-gradient(circle at 120px 180px, rgba(255,255,255,0.7) 0 1.4px, transparent 2.2px),
    radial-gradient(circle at 200px 90px, rgba(255,255,255,0.6) 0 1px, transparent 1.7px),
    radial-gradient(circle at 250px 250px, rgba(255,255,255,0.8) 0 1.2px, transparent 2px);
  background-size: 300px 300px;
}

.site-stars::before {
  background-image:
    radial-gradient(circle at 60px 160px, rgba(255,255,255,0.8) 0 1px, transparent 1.6px),
    radial-gradient(circle at 170px 50px, rgba(255,255,255,0.65) 0 1.2px, transparent 1.9px),
    radial-gradient(circle at 90px 260px, rgba(255,255,255,0.55) 0 1px, transparent 1.6px);
  background-size: 440px 440px;
}

.site-stars::after {
  background-image:
    radial-gradient(circle at 140px 220px, rgba(255,255,255,0.75) 0 1.3px, transparent 2px),
    radial-gradient(circle at 320px 120px, rgba(255,255,255,0.6) 0 1px, transparent 1.7px),
    radial-gradient(circle at 260px 300px, rgba(255,255,255,0.85) 0 1.2px, transparent 1.9px);
  background-size: 520px 520px;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.18; }
  50% { opacity: 1; }
}

/* ---------- 暖色阅读光晕（仅夜间） ---------- */
.site-glow {
  position: fixed;
  top: 26%;
  left: 50%;
  width: 76vw;
  height: 62vh;
  transform: translate(-50%, -50%);
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(255, 189, 118, 0.12), transparent 68%);
  opacity: 0;
  transition: opacity 0.6s ease;
}

[data-theme="dark"] .site-glow { opacity: 1; }

/* 夜间卡片呈现被灯光照亮的温润纸面 + 细纸纹 */
[data-theme="dark"] .card,
[data-theme="dark"] .post,
[data-theme="dark"] .shuoshuo-item,
[data-theme="dark"] .taxonomy-item {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
  background-size: 160px 160px;
  box-shadow: 0 0 40px rgba(255, 189, 118, 0.05);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.3s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 20px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.seal-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--seal);
  color: var(--paper);
  font-size: 21px;
  font-weight: 700;
  border-radius: 5px;
  line-height: 1;
  flex: none;
}

.seal-mark.small {
  width: 22px;
  height: 22px;
  font-size: 12px;
  border-radius: 3px;
  vertical-align: -4px;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-title { font-size: 19px; font-weight: 700; letter-spacing: 0.08em; }
.brand-subtitle { font-size: 11.5px; color: var(--ink-muted); letter-spacing: 0.35em; }

.site-nav { display: flex; gap: 4px; }
.site-nav a {
  padding: 6px 13px;
  font-size: 15px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.site-nav a:hover { color: var(--seal); border-bottom-color: var(--seal); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--card);
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
}
.theme-toggle:hover {
  color: var(--seal);
  border-color: var(--seal);
  transform: rotate(10deg);
}
.theme-icon { display: inline-block; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  text-align: center;
  padding: 72px 0 40px;
}

.hero::before {
  content: "墨";
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 190px;
  line-height: 1;
  color: var(--watermark);
  pointer-events: none;
}

.hero-title {
  position: relative;
  margin: 0;
  font-size: 44px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-indent: 0.16em;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.3), 0 0 22px rgba(245, 242, 233, 0.75);
}

.hero-subtitle {
  position: relative;
  margin: 18px 0 0;
  color: var(--ink-muted);
  font-size: 15px;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.3), 0 0 16px rgba(245, 242, 233, 0.7);
}

[data-theme="dark"] .hero-title,
[data-theme="dark"] .hero-subtitle {
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 0 20px rgba(20, 19, 17, 0.8);
}

.hero-rule {
  position: relative;
  width: 150px;
  height: 1px;
  margin: 30px auto 0;
  background: var(--line-strong);
}

.hero-rule-char {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--paper);
  padding: 0 14px;
  color: var(--seal);
  font-size: 15px;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
}

.hero-small {
  padding: 52px 0 28px;
}
.hero-small .hero-title { font-size: 32px; }
.hero-small::before { font-size: 130px; top: 4px; }

/* ---------- 文章卡片 ---------- */
.post-list { padding-bottom: 10px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 30px 34px;
  margin-bottom: 22px;
  transition: border-color 0.25s, transform 0.25s;
}

.card:hover {
  border-color: var(--seal);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.card-date {
  color: var(--ink-muted);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.card-tags { display: inline-flex; flex-wrap: wrap; gap: 6px; }

.tag {
  display: inline-block;
  padding: 1px 11px;
  font-size: 12.5px;
  color: var(--ink-soft);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  letter-spacing: 0.08em;
  transition: color 0.2s, border-color 0.2s;
}

.tag:hover { color: var(--seal); border-color: var(--seal); }

.card-title {
  margin: 14px 0 10px;
  font-size: 24px;
  line-height: 1.55;
  letter-spacing: 0.04em;
}

.card-title a {
  background-image: linear-gradient(var(--seal), var(--seal));
  background-size: 0 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s, color 0.2s;
}
.card-title a:hover { color: var(--seal); background-size: 100% 1px; }

.card-excerpt {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.9;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-more {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  color: var(--seal);
  letter-spacing: 0.1em;
}
.card-more span { transition: transform 0.2s; display: inline-block; }
.card-more:hover span { transform: translateX(4px); }

/* ---------- 分页 ---------- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 30px 0 10px;
}

.pagination a,
.pagination .space,
.pagination .current {
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--card);
  color: var(--ink-soft);
  font-size: 14px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.pagination a:hover { color: var(--seal); border-color: var(--seal); }
.pagination .current {
  background: var(--seal);
  border-color: var(--seal);
  color: var(--paper);
}

/* ---------- 文章页 ---------- */
.post-wrap {
  max-width: 1010px;
  display: flex;
  align-items: flex-start;
  gap: 40px;
}

.post {
  flex: 0 1 690px;
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 46px 52px;
  margin-top: 36px;
}

.post-header { position: relative; padding-right: 8px; }

.post-header::after {
  content: "文";
  position: absolute;
  top: 2px;
  right: 0;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--seal);
  color: var(--paper);
  font-size: 22px;
  font-weight: 700;
  border-radius: 5px;
}

.post-date {
  margin: 0 0 12px;
  color: var(--ink-muted);
  font-size: 13px;
  letter-spacing: 0.18em;
}

.post-title {
  margin: 0;
  font-size: 31px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  padding-right: 64px;
}

.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  color: var(--ink-muted);
  font-size: 13.5px;
}

.meta-sep { color: var(--line-strong); }

.post-cover {
  margin: 30px 0 10px;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.post-cover img {
  display: block;
  width: 100%;
  max-height: 440px;
  object-fit: cover;
}

.post-tags {
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.post-nav-item { display: block; min-width: 0; }
.post-nav-item span { display: block; font-size: 12.5px; color: var(--ink-muted); margin-bottom: 4px; letter-spacing: 0.12em; }
.post-nav-item b { display: block; font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: color 0.2s; }
.post-nav-item:hover b { color: var(--seal); }
.post-nav-item.next { text-align: right; }

/* ---------- 评论 ---------- */
.post-comments {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.post-comments-title {
  display: inline-block;
  margin: 0 0 6px;
  padding: 4px 16px;
  font-size: 15px;
  letter-spacing: 0.35em;
  text-indent: 0.35em;
  color: #ffffff;
  background: var(--seal);
  border-radius: 3px;
}

.post-comments .giscus,
.post-comments iframe {
  width: 100%;
  border: none;
}

/* ---------- 目录 ---------- */
.toc {
  flex: 0 0 200px;
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 120px);
  overflow: auto;
  padding: 22px 18px;
  border-left: 1px solid var(--line);
}

.toc-title {
  margin: 0 0 12px;
  font-size: 14px;
  letter-spacing: 0.45em;
  color: var(--ink-muted);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-list li { margin: 0; }
.toc-list a {
  display: block;
  padding: 3px 0 3px 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-muted);
  border-left: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toc-list a:hover { color: var(--ink); }
.toc-list .toc-sub a { padding-left: 22px; font-size: 12px; }
.toc-list li.active > a { color: var(--seal); border-left-color: var(--seal); }

/* ---------- 正文排版 ---------- */
.typography { font-size: 16.5px; }

.typography p { margin: 1.15em 0; text-align: justify; }

.typography h2,
.typography h3,
.typography h4 {
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.05em;
}

.typography h2 {
  font-size: 24px;
  margin: 2em 0 0.85em;
  padding-bottom: 0.45em;
  border-bottom: 1px solid var(--line);
}

.typography h3 { font-size: 20px; margin: 1.8em 0 0.7em; }
.typography h4 { font-size: 17.5px; margin: 1.6em 0 0.6em; }

.typography a {
  color: var(--seal);
  text-decoration: underline;
  text-decoration-color: rgba(166, 59, 42, 0.35);
  text-underline-offset: 4px;
  transition: text-decoration-color 0.2s;
}
.typography a:hover { text-decoration-color: var(--seal); }

.typography blockquote {
  margin: 1.6em 0;
  padding: 13px 22px;
  background: var(--highlight);
  border-left: 3px solid var(--line-strong);
  color: var(--ink-soft);
}

.typography ul,
.typography ol { padding-left: 1.7em; }
.typography li { margin: 0.45em 0; }

.typography img {
  display: block;
  margin: 1.6em auto;
  border: 1px solid var(--line);
  padding: 6px;
  background: var(--source-bg);
}

.typography hr {
  border: none;
  border-top: 1px dashed var(--line-strong);
  margin: 2.4em 0;
}

.typography table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 15px;
}

.typography th,
.typography td {
  border: 1px solid var(--line);
  padding: 9px 14px;
}

.typography thead th { background: var(--highlight); font-weight: 700; }

.typography code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--highlight);
  color: var(--seal-deep);
  padding: 2px 7px;
  border-radius: 3px;
}

.typography pre {
  margin: 1.6em 0;
  padding: 18px 20px;
  background: var(--code-bg);
  color: var(--code-text);
  border: 1px solid #33332b;
  border-radius: 2px;
  overflow: auto;
  line-height: 1.75;
}

.typography pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: 14px;
}

/* hexo highlight.js 输出 */
.typography .highlight {
  margin: 1.6em 0;
  background: var(--code-bg);
  color: var(--code-text);
  border: 1px solid #33332b;
  border-radius: 2px;
  overflow: auto;
  font-size: 14px;
  line-height: 1.75;
}

.typography .highlight table { margin: 0; border: none; width: auto; }
.typography .highlight tr,
.typography .highlight td { border: none; padding: 0; background: transparent; }

.typography .highlight .gutter {
  padding: 18px 14px 18px 20px;
  color: var(--code-gutter);
  text-align: right;
  user-select: none;
  border-right: 1px solid #3a3a31;
}

.typography .highlight .code { padding: 18px 20px; }
.typography .highlight pre { margin: 0; padding: 0; border: none; background: transparent; }
.typography .highlight .line { line-height: 1.75; }

/* markdown-it-admon 提示块 */
.typography .admonition {
  margin: 1.6em 0;
  padding: 14px 20px;
  background: var(--highlight);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: 2px;
}
.typography .admonition-title { font-weight: 700; margin-bottom: 6px; }

/* Butterfly {% note %} 提示块（水墨风格） */
.typography .note {
  display: flex;
  gap: 14px;
  margin: 1.6em 0;
  padding: 15px 20px;
  background: var(--highlight);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: 2px;
}

.typography .note-label {
  flex: none;
  width: 27px;
  height: 27px;
  margin-top: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: var(--paper);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
}

.typography .note.warning .note-label,
.typography .note.danger .note-label,
.typography .note.update .note-label {
  background: var(--seal);
}

.typography .note.tip .note-label,
.typography .note.help .note-label {
  background: var(--seal-deep);
}

.typography .note.success .note-label {
  background: #43613c;
}

.typography .note-body { flex: 1; min-width: 0; }
.typography .note-body p:first-child { margin-top: 0; }
.typography .note-body p:last-child { margin-bottom: 0; }

/* ---------- 归档 ---------- */
.archive { padding-bottom: 20px; }

.archive-year { margin-bottom: 38px; }

.archive-year-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.year-num { font-size: 28px; font-weight: 700; letter-spacing: 0.08em; }
.year-count { font-size: 12.5px; color: var(--ink-muted); letter-spacing: 0.15em; }

.archive-list { list-style: none; margin: 0; padding: 0; }

.archive-item {
  display: flex;
  align-items: baseline;
  gap: 22px;
  padding: 11px 4px;
  border-bottom: 1px dashed var(--line);
}

.archive-date {
  flex: none;
  width: 84px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-muted);
}

.archive-link { font-size: 16px; transition: color 0.2s; }
.archive-link:hover { color: var(--seal); }

/* ---------- 标签 / 分类 ---------- */
.taxonomy-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-bottom: 30px;
}

.taxonomy-item {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: color 0.2s, border-color 0.2s, transform 0.2s;
}

.taxonomy-item:hover {
  color: var(--seal);
  border-color: var(--seal);
  transform: translateY(-2px);
}

.taxonomy-name { font-size: 16px; letter-spacing: 0.12em; }
.taxonomy-count {
  font-size: 12px;
  color: var(--seal);
  border: 1px solid rgba(166, 59, 42, 0.4);
  border-radius: 999px;
  padding: 0 8px;
  line-height: 1.7;
}

.taxonomy-empty {
  width: 100%;
  padding: 40px 0;
  text-align: center;
  color: var(--ink-muted);
  letter-spacing: 0.15em;
}

/* ---------- 说说 ---------- */
.shuoshuo-intro { text-align: center; color: var(--ink-muted); margin-bottom: 26px; }
.shuoshuo-intro img { border: 1px solid var(--line); padding: 6px; background: var(--source-bg); }

.shuoshuo-list { padding-bottom: 20px; }

.shuoshuo-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: 2px;
  padding: 20px 26px;
  margin-bottom: 18px;
}

.shuoshuo-date {
  display: block;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-muted);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.shuoshuo-content { font-size: 16px; }
.shuoshuo-content p:first-child { margin-top: 0; }
.shuoshuo-content p:last-child { margin-bottom: 0; }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 80px;
  border-top: 1px solid var(--line);
  padding: 36px 0 48px;
  text-align: center;
}

.footer-line {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-soft);
  letter-spacing: 0.1em;
}

.footer-dot { margin: 0 10px; color: var(--line-strong); }

.footer-extra {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
}

.footer-extra a { color: var(--ink-soft); }
.footer-extra a:hover { color: var(--seal); }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--card);
  color: var(--ink-soft);
  font-size: 17px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s, color 0.2s, border-color 0.2s;
}

.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { color: var(--seal); border-color: var(--seal); }

/* ---------- 响应式 ---------- */
@media (max-width: 1120px) {
  .toc { display: none; }
  .post-wrap { max-width: 920px; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .container { padding: 0 16px; }

  .header-inner { flex-direction: column; gap: 6px; padding: 12px 0; }
  .site-nav { flex-wrap: wrap; justify-content: center; }
  .site-nav a { padding: 4px 10px; font-size: 14px; }

  .hero { padding: 46px 0 28px; }
  .hero-title { font-size: 30px; }
  .hero-subtitle { font-size: 13px; letter-spacing: 0.28em; text-indent: 0.28em; }
  .hero::before { font-size: 130px; }
  .hero-small .hero-title { font-size: 26px; }

  .card { padding: 22px 20px; }
  .card-title { font-size: 20px; }
  .card-excerpt { font-size: 14.5px; }

  .post { padding: 30px 22px; margin-top: 20px; }
  .post-title { font-size: 24px; padding-right: 0; }
  .post-header::after { display: none; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-item.next { text-align: left; }

  .typography { font-size: 15.5px; }
  .typography h2 { font-size: 21px; }
  .typography h3 { font-size: 18px; }
  .typography pre,
  .typography .highlight { font-size: 12.5px; }

  .archive-item { gap: 12px; }
  .archive-date { width: 70px; }
}