/* 1. 基础样式与可访问性 */
* {
  box-sizing: border-box;
}

html {
  overflow-y: scroll;
  font-size: 16px;
}

body {
  margin: 0;
  background: #fff;
  color: #555;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.8;
}

a {
  color: #4e7198;
  text-decoration: none;
  transition: color .15s ease;
}

a:hover,
a:focus {
  color: #b54b42;
}

.sr-only {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  top: 1rem;
  left: 1rem;
  z-index: 10;
  padding: 5px 12px;
  background: #444;
  color: #fff;
}

/* 2. 页头与主导航 */
.site-header {
  padding: 54px 0 0;
}

.header-inner,
.site-shell,
.site-footer-inner {
  width: 1040px;
  max-width: calc(100% - 40px);
  margin: 0 auto;
}

.header-inner {
  position: relative;
  min-height: 106px;
  border-bottom: 1px solid #ddd;
}

.brand {
  display: inline-block;
  color: #555;
}

.brand:hover {
  color: #444;
}

.brand strong {
  display: block;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 38px;
  font-weight: bold;
  line-height: 1.15;
  letter-spacing: -1px;
}

.brand small {
  display: block;
  margin-top: 2px;
  color: #aaa;
  font-size: 13px;
  line-height: 1.2;
}

.site-nav {
  position: absolute;
  right: 0;
  bottom: -1px;
  display: flex;
  align-items: flex-end;
  height: 38px;
}

.site-nav a {
  display: block;
  height: 37px;
  padding: 0 15px;
  border: 1px solid transparent;
  border-bottom-color: transparent;
  color: #444;
  font-size: 13px;
  line-height: 35px;
  white-space: nowrap;
}

.site-nav a i,
.widget-title i,
.post-date i,
.site-search button i {
  margin-right: 4px;
}

.site-nav a:hover,
.site-nav a.active {
  border-color: #ddd;
  border-bottom-color: #fff;
  background: #fff;
  color: #444;
}

/* 3. 主内容框架与文章列表 */
.site-shell {
  padding: 40px 0 70px;
}

.classic-layout {
  display: grid;
  grid-template-columns: minmax(0, 735px) 260px;
  gap: 40px;
}

.content-main {
  min-width: 0;
}

.post-list {
  display: flex;
  flex-direction: column;
}

.post-card {
  position: relative;
  margin: 0 0 29px;
  padding: 0 0 30px;
  border-bottom: 1px solid #eee;
}

.post-card h2 {
  margin: 0 0 5px;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 25px;
  font-weight: bold;
  line-height: 1.45;
}

.post-card h2 a {
  color: #555;
}

.post-card h2 a:hover {
  color: #b54b42;
}

.post-date {
  margin: 1px 0 11px;
  color: #aaa;
  font-size: 13px;
  line-height: 1.5;
}

.post-date span {
  color: #777;
  font-size: 12px;
}

.post-excerpt {
  overflow: hidden;
  max-height: 5.4em;
  color: #555;
  font-size: 15px;
  line-height: 1.85;
}

.read-more {
  display: block;
  width: max-content;
  margin: 14px 0 0 auto;
  padding: 2px 10px;
  border: 1px solid #e2e2e2;
  border-radius: 3px;
  color: #777;
  font-size: 13px;
  line-height: 1.7;
}

.read-more:hover {
  border-color: #bbb;
  color: #444;
}

.read-more span {
  font-size: 10px;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  color: #777;
  font-size: 13px;
}

.pagination .page-number,
.pagination .page-control {
  display: inline-flex;
  min-width: 32px;
  height: 30px;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border: 1px solid #d8dde2;
  border-radius: 4px;
  background: linear-gradient(#fff, #f1f3f5);
  box-shadow: 0 1px 2px rgb(0 0 0 / 8%);
  color: #4e7198;
  font-size: 14px;
  line-height: 1;
}

.pagination .page-number:hover,
.pagination .page-control:hover {
  border-color: #b8c2cc;
  background: #f1f4f7;
  color: #3d5f84;
}

.pagination .page-number.is-current {
  border-color: #405f7f;
  background: #4e7198;
  color: #fff;
  font-weight: 600;
}

.pagination .pagination-ellipsis {
  min-width: 18px;
  color: #777;
  text-align: center;
}

/* 4. 侧栏：搜索、分类、标签与最近文章 */
.sidebar {
  padding-left: 34px;
  border-left: 1px solid #e5e5e5;
}

.site-search {
  position: relative;
  margin: 0 0 28px;
}

.site-search input {
  width: 100%;
  height: 32px;
  padding: 5px 31px 5px 10px;
  border: 1px solid #bbb;
  border-radius: 3px;
  outline: none;
  color: #555;
  font: 13px inherit;
}

.site-search input:focus {
  border-color: #888;
  box-shadow: 0 0 0 2px #f1f1f1;
}

.site-search button {
  position: absolute;
  top: 0;
  right: 0;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  color: #777;
  font-size: 14px;
  line-height: 32px;
  cursor: pointer;
}

.widget {
  margin: 0 0 27px;
}

.widget-title {
  margin: 0 0 8px;
  padding: 0 0 8px;
  border-bottom: 1px solid #eee;
  color: #777;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.6;
}

.widget-category .widget-title .site-icon,
.widget-links .widget-title .site-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.widget-category .widget-title,
.widget-links .widget-title {
  display: flex;
  align-items: center;
  gap: 2px;
}

.widget-title i {
  display: inline-block;
  width: 19px;
  color: #777;
}

.widget-list,
.recent-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.widget-list li {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  line-height: 1.8;
}

.widget-list a,
.recent-list a {
  color: #777;
  font-size: 13px;
}

.widget-list a:hover,
.recent-list a:hover {
  color: #b54b42;
}

.widget-list li span {
  color: #999;
  font-size: 12px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 10px;
}

.tag-list a {
  color: #777;
  font-size: 13px;
}

.tag-list a:hover {
  color: #b54b42;
}

.recent-list li {
  line-height: 1.8;
}

/* 5. 文章详情 */
.article-header {
  margin: 0 0 28px;
  padding: 0 0 20px;
  border-bottom: 1px solid #eee;
}

.article-header h1 {
  margin: 0 0 7px;
  color: #555;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 29px;
  font-weight: bold;
  line-height: 1.45;
}

.article-kicker {
  display: none;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #aaa;
  font-size: 13px;
}

.post-meta a {
  color: #777;
}

.post-meta .meta-separator {
  margin: 0;
}

.article-toc {
  margin: 20px 0;
  padding: 10px 15px;
  border: 1px solid #eee;
  background: #fafafa;
  color: #777;
  font-size: 13px;
}

.toc-title {
  margin: 0;
  color: #555;
  font-weight: bold;
}

.article-toc ul {
  margin: 4px 0 0;
  padding-left: 20px;
}

.article-body {
  color: #555;
  font-size: 15px;
  line-height: 1.9;
}

.article-body h2,
.article-body h3,
.article-body h4 {
  color: #555;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  line-height: 1.5;
}

.article-body h2 {
  margin: 1.5em 0 .55em;
  font-size: 24px;
}

.article-body h3 {
  margin: 1.4em 0 .5em;
  font-size: 20px;
}

.article-body p {
  margin: 0 0 1.25em;
}

.article-body img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 18px auto;
}

.article-body a {
  border-bottom: 1px solid #dce4eb;
}

.article-body blockquote {
  margin: 20px 0;
  padding: 7px 18px;
  border-left: 3px solid #ddd;
  color: #777;
}

.article-body pre {
  overflow: auto;
  margin: 20px 0;
  padding: 14px;
  border: 1px solid #eee;
  background: #f7f7f7;
  font-size: 13px;
  line-height: 1.65;
}

.article-body code {
  padding: 1px 4px;
  background: #f5f5f5;
  color: #666;
  font-size: .9em;
}

.article-body pre code {
  padding: 0;
  background: transparent;
}

.article-tags {
  padding: 18px 0;
  border-top: 1px solid #eee;
  color: #777;
  font-size: 13px;
}

.article-tags a {
  margin-right: 12px;
  color: #777;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  padding-top: 17px;
  border-top: 1px solid #eee;
  color: #777;
  font-size: 13px;
}

.article-footer .next {
  text-align: right;
}

/* 6. 归档、分类、标签与空状态页面 */
.section-heading {
  margin-bottom: 25px;
}

.section-heading h1,
.terms-page h1,
.not-found h1 {
  margin: 0;
  color: #555;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 28px;
  font-weight: bold;
}

.section-heading .eyebrow,
.result-count {
  display: none;
}

.term-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  margin-top: 20px;
}

.term-cloud a {
  color: #777;
  font-size: 14px;
}

.term-cloud a:hover {
  color: #b54b42;
}

.archives-page h1 {
  margin: 0 0 28px;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 29px;
}

.archive-year {
  margin: 0 0 28px;
}

.archive-year h2 {
  margin: 0 0 8px;
  padding-bottom: 7px;
  border-bottom: 1px solid #eee;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 22px;
  font-weight: 400;
}

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

.archive-year li {
  display: flex;
  gap: 20px;
  line-height: 1.9;
}

.archive-year time {
  width: 45px;
  color: #aaa;
  font-size: 13px;
}

.archive-year a {
  color: #666;
  font-size: 14px;
}

.not-found {
  max-width: 735px;
  margin: 70px auto;
  text-align: center;
}

.not-found .eyebrow {
  color: #aaa;
}

.not-found p:not(.eyebrow) {
  color: #888;
}

.button-link {
  display: inline-block;
  padding: 3px 13px;
  border: 1px solid #ddd;
  border-radius: 3px;
  color: #777;
  font-size: 13px;
}

/* 7. 页脚 */
.site-footer {
  border-top: 1px solid #eee;
  color: #aaa;
  font-size: 12px;
}

.site-footer-inner {
  display: flex;
  justify-content: space-between;
  padding: 22px 0;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #888;
}

/* 8. 响应式布局 */
@media (max-width: 800px) {
  .header-inner,
  .site-shell,
  .site-footer-inner {
    max-width: calc(100% - 30px);
  }

  .site-header {
    padding-top: 30px;
  }

  .header-inner {
    min-height: 140px;
  }

  .site-nav {
    position: static;
    display: flex;
    flex-wrap: wrap;
    height: auto;
    margin-top: 28px;
  }

  .site-nav a {
    height: 34px;
    padding: 0 11px;
    line-height: 34px;
  }

  .classic-layout {
    display: block;
  }

  .sidebar {
    margin-top: 42px;
    padding: 25px 0 0;
    border-top: 1px solid #e5e5e5;
    border-left: 0;
  }

  .brand strong {
    font-size: 32px;
  }
}

@media (max-width: 480px) {
  .site-nav a {
    padding: 0 8px;
    font-size: 12px;
  }

  .post-card h2 {
    font-size: 22px;
  }

  .article-header h1 {
    font-size: 26px;
  }

  .site-footer-inner {
    display: block;
  }

  .site-footer p + p {
    margin-top: 4px;
  }
}
.site-icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.12em;
  fill: currentColor;
}