:root {
  --rainlin-bg: #f3f8fc;
  --rainlin-bg-accent: #e8f4fc;
  --rainlin-grid: rgba(14, 165, 233, 0.09);
  --rainlin-surface: rgba(255, 255, 255, 0.96);
  --rainlin-surface-solid: #ffffff;
  --rainlin-ink: #0f172a;
  --rainlin-text: #334155;
  --rainlin-muted: #64748b;
  --rainlin-faint: #94a3b8;
  --rainlin-line: rgba(14, 116, 144, 0.14);
  --rainlin-line-strong: rgba(14, 116, 144, 0.22);
  --rainlin-accent: #0284c7;
  --rainlin-accent-soft: #38bdf8;
  --rainlin-code-bg: #f1f5f9;
  --rainlin-code: #334155;
  --rainlin-shadow: 0 14px 36px rgba(2, 132, 199, 0.1);
  --rainlin-shadow-soft: 0 8px 22px rgba(2, 132, 199, 0.07);
  --rainlin-radius: 14px;
  --rainlin-radius-sm: 10px;
  --rainlin-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

html {
  background: var(--rainlin-bg);
}

body {
  color: var(--rainlin-text);
  font-family: var(--rainlin-font);
  background:
    linear-gradient(var(--rainlin-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--rainlin-grid) 1px, transparent 1px),
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(186, 230, 253, 0.35), transparent 60%),
    var(--rainlin-bg);
  background-size: 26px 26px, 26px 26px, auto, auto;
  letter-spacing: 0.01em;
}

a {
  color: var(--rainlin-accent);
}

a:hover {
  color: var(--rainlin-accent-soft);
}

#page-header {
  --header-grid: rgba(148, 197, 255, 0.07);
  background:
    radial-gradient(circle at 18% 22%, rgba(56, 189, 248, 0.32), transparent 46%),
    radial-gradient(circle at 82% 16%, rgba(129, 140, 248, 0.28), transparent 44%),
    radial-gradient(circle at 50% 110%, rgba(45, 212, 191, 0.18), transparent 55%),
    linear-gradient(var(--header-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--header-grid) 1px, transparent 1px),
    linear-gradient(135deg, #0a1020 0%, #111d3a 52%, #0a1020 100%);
  background-size: auto, auto, auto, 32px 32px, 32px 32px, auto;
  color: #f8fafc;
}

#page-header::before {
  background: linear-gradient(180deg, rgba(10, 16, 32, 0) 0%, rgba(10, 16, 32, 0.5) 100%);
}

#page-header.full_page {
  height: 44vh;
  min-height: 340px;
  max-height: 440px;
}

#site-info {
  top: 50%;
  z-index: 2;
  padding: 0 1.25rem;
  text-align: center;
}

#site-info::after {
  content: none;
}

#page-header #site-title {
  color: #ffffff !important;
  font-size: 2.85rem !important;
  font-weight: 750;
  letter-spacing: -0.025em;
  text-shadow: 0 2px 24px rgba(8, 47, 73, 0.45) !important;
}

#page-header #site-title::before {
  content: none;
  display: none;
}

#page-header #site-subtitle {
  display: block !important;
  margin-top: 0.95rem;
  color: rgba(226, 232, 240, 0.86) !important;
  font-size: 1.02rem !important;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.03em;
  text-shadow: none !important;
}

#page-header #post-info {
  color: #f8fafc;
  text-shadow: none;
}

#page-header.post-bg #post-info {
  left: 0;
  right: 0;
  bottom: 3.1rem;
  width: 100%;
  padding: 0 1.5rem;
  text-align: center;
}

#page-header #post-info .post-title {
  color: #ffffff !important;
  max-width: 920px;
  margin: 0 auto 1.05rem;
  padding: 0;
  font-weight: 750;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  text-wrap: balance;
  text-shadow: 0 2px 24px rgba(8, 47, 73, 0.45) !important;
}

#page-header #post-info #post-meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
}

#page-header #post-info #post-meta .meta-firstline,
#page-header #post-info #post-meta .meta-secondline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.65rem;
  max-width: 900px;
}

#page-header #post-info #post-meta .post-meta-separator {
  display: none;
}

#page-header #post-info #post-meta .meta-firstline > span:not(.post-meta-separator),
#page-header #post-info #post-meta .meta-secondline > span:not(.post-meta-separator) {
  display: inline-flex;
  align-items: center;
  gap: 0.18rem;
  min-height: 2rem;
  padding: 0.28rem 0.68rem;
  border: 1px solid rgba(226, 232, 240, 0.22);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.28);
  backdrop-filter: blur(10px);
}

#page-header #post-info #post-meta,
#page-header #post-info #post-meta a,
#page-header #post-info #post-meta span {
  color: rgba(226, 232, 240, 0.85) !important;
  text-shadow: none !important;
}

#site_social_icons .social-icon,
#site_social_icons .social-icon i {
  color: rgba(248, 250, 252, 0.92) !important;
  filter: none;
  transition: color 0.18s ease, transform 0.18s ease;
}

#site_social_icons .social-icon:hover i {
  color: #7dd3fc !important;
  transform: translateY(-2px);
}

#site_social_icons .social-icon .fa-zhihu {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 0.38rem;
  color: #ffffff !important;
  background: #0084ff;
  font-size: 0.92rem;
  line-height: 1;
}

#site_social_icons .social-icon:hover .fa-zhihu {
  color: #ffffff !important;
  background: #0ea5ff;
  box-shadow: 0 8px 18px rgba(0, 132, 255, 0.28);
}

#nav {
  backdrop-filter: blur(16px);
  color: var(--rainlin-ink);
}

#nav.show,
#page-header.nav-fixed #nav {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--rainlin-line);
  box-shadow: var(--rainlin-shadow-soft);
}

#nav a,
#nav .site-page,
#nav .site-name {
  color: rgba(248, 250, 252, 0.92);
  text-shadow: none;
}

#nav.show a,
#nav.show .site-page,
#nav.show .site-name,
#page-header.nav-fixed #nav a,
#page-header.nav-fixed #nav .site-page,
#page-header.nav-fixed #nav .site-name {
  color: var(--rainlin-ink);
}

#nav .site-name {
  font-weight: 700;
  letter-spacing: 0;
}

#nav .site-page:hover,
#nav a:hover {
  color: var(--rainlin-accent-soft) !important;
}

#page-header.nav-fixed #nav .site-page:hover,
#page-header.nav-fixed #nav a:hover {
  color: var(--rainlin-accent) !important;
}

#nav .site-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
}

#nav .menus_items .menus_item .menus_item_child {
  border: 1px solid var(--rainlin-line);
  border-radius: var(--rainlin-radius-sm);
  background: var(--rainlin-surface);
  box-shadow: var(--rainlin-shadow-soft);
}

.layout {
  max-width: 1080px;
  margin-top: 2.5rem;
  padding-top: 0;
}

#recent-posts > .recent-post-item,
#aside-content .card-widget,
.layout > div:first-child:not(.recent-posts),
#post,
#page {
  border: 1px solid var(--rainlin-line);
  border-radius: var(--rainlin-radius);
  background: var(--rainlin-surface);
  box-shadow: var(--rainlin-shadow-soft);
}

#recent-posts > .recent-post-item {
  min-height: 160px;
  overflow: hidden;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

#recent-posts > .recent-post-item:hover {
  transform: translateY(-2px);
  border-color: rgba(2, 132, 199, 0.32);
  box-shadow: var(--rainlin-shadow);
}

#recent-posts > .recent-post-item > .recent-post-info {
  padding: 1.35rem 1.5rem;
}

#recent-posts > .recent-post-item > .recent-post-info > .article-title {
  color: var(--rainlin-ink);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0;
}

#recent-posts > .recent-post-item > .recent-post-info > .article-title:hover {
  color: var(--rainlin-accent);
}

#recent-posts > .recent-post-item > .recent-post-info > .content {
  color: var(--rainlin-muted);
  font-size: 0.94rem;
  line-height: 1.8;
}

.article-meta-wrap,
.post-meta-date,
.article-sort-item-info,
#aside-content .card-info .author-info-description,
#aside-content .card-info .author-info__description {
  color: var(--rainlin-muted);
  font-size: 0.88rem;
}

.article-meta-wrap a,
.post-meta-date a {
  color: var(--rainlin-muted);
}

.article-meta-wrap a:hover,
.post-meta-date a:hover {
  color: var(--rainlin-accent);
}

#aside-content .card-widget {
  padding: 1.15rem 1.1rem;
}

#aside-content .card-info .avatar-img {
  width: 88px;
  height: 88px;
  margin: 0 auto 0.85rem;
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.15);
}

#aside-content .card-info .avatar-img img {
  border-radius: 50%;
}

#aside-content .card-info .author-info-name,
#aside-content .card-info .author-info__name {
  color: var(--rainlin-ink);
  font-weight: 700;
  letter-spacing: 0;
}

#aside-content .card-info #card-info-btn {
  border-radius: 999px;
  background: var(--rainlin-accent);
  box-shadow: 0 10px 22px rgba(14, 165, 233, 0.22);
}

#aside-content .card-info #card-info-btn:hover {
  background: var(--rainlin-accent-soft);
}

#aside-content .card-announcement .item-headline,
#aside-content .item-headline {
  color: var(--rainlin-ink);
  font-weight: 700;
  letter-spacing: 0;
}

#aside-content .item-headline i {
  color: var(--rainlin-accent-soft);
}

#aside-content .card-tag-cloud a,
#aside-content .aside-list .aside-list-item .content > .title {
  color: var(--rainlin-text);
  border-radius: 999px;
}

#aside-content .card-tag-cloud a:hover,
#aside-content .aside-list .aside-list-item .content > .title:hover {
  color: var(--rainlin-accent);
}

#card-toc .toc-content .toc-link {
  color: var(--rainlin-muted);
  line-height: 1.75;
}

#card-toc .toc-content .toc-link.active {
  color: var(--rainlin-accent);
  font-weight: 600;
}

#post,
#page {
  padding: 2.25rem 2.5rem;
}

#article-container {
  color: var(--rainlin-text);
  font-size: 17px;
  line-height: 1.92;
}

#article-container p {
  margin: 0 0 1.1rem;
}

#article-container h1,
#article-container h2,
#article-container h3,
#article-container h4 {
  color: var(--rainlin-ink);
  font-weight: 700;
  letter-spacing: -0.01em;
}

#article-container h2 {
  margin-top: 2.4rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rainlin-line);
  font-size: 1.45rem;
}

#article-container h3 {
  margin-top: 1.8rem;
  font-size: 1.2rem;
}

#article-container h2::before,
#article-container h3::before {
  color: var(--rainlin-accent);
}

#article-container blockquote {
  border-left: 4px solid var(--rainlin-accent-soft);
  border-radius: 0 var(--rainlin-radius-sm) var(--rainlin-radius-sm) 0;
  background: var(--rainlin-bg-accent);
  color: var(--rainlin-text);
}

#article-container table {
  border-radius: var(--rainlin-radius-sm);
  overflow: hidden;
  font-size: 0.95rem;
}

#article-container th {
  background: #f0f9ff;
  color: var(--rainlin-ink);
}

#article-container img {
  border: 1px solid var(--rainlin-line);
  border-radius: var(--rainlin-radius-sm);
  background: #ffffff;
  box-shadow: var(--rainlin-shadow-soft);
}

figure.highlight,
pre[class*='language-'] {
  border: 1px solid var(--rainlin-line);
  border-radius: var(--rainlin-radius-sm);
  box-shadow: none;
}

figure.highlight table,
figure.highlight .code pre {
  background: var(--rainlin-code-bg);
}

figure.highlight pre,
figure.highlight td,
figure.highlight span {
  color: var(--rainlin-code);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.post-copyright,
.tag_share,
.relatedPosts {
  border-radius: var(--rainlin-radius-sm);
  background: rgba(255, 255, 255, 0.7);
}

#pagination .page-number.current,
#pagination .extend:hover,
#pagination .page-number:hover {
  border-radius: 999px;
  background: var(--rainlin-accent);
}

#footer {
  background:
    linear-gradient(var(--rainlin-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--rainlin-grid) 1px, transparent 1px),
    #eef6fc;
  background-size: 26px 26px, 26px 26px, auto;
  color: var(--rainlin-muted);
  border-top: 1px solid var(--rainlin-line);
}

#footer::before {
  background: transparent;
}

#footer-wrap a {
  color: var(--rainlin-accent);
}

/* 右下角工具按钮 */
#rightside > div > button,
#rightside > div > a {
  border-radius: 50%;
  background: var(--rainlin-surface);
  border: 1px solid var(--rainlin-line);
  box-shadow: var(--rainlin-shadow-soft);
  color: var(--rainlin-muted);
}

#rightside > div > button:hover,
#rightside > div > a:hover {
  color: var(--rainlin-accent);
  background: #f0f9ff;
}

[data-theme='dark'] {
  --rainlin-bg: #0f172a;
  --rainlin-bg-accent: #1e293b;
  --rainlin-grid: rgba(56, 189, 248, 0.08);
  --rainlin-surface: rgba(30, 41, 59, 0.94);
  --rainlin-surface-solid: #1e293b;
  --rainlin-ink: #e2e8f0;
  --rainlin-text: #cbd5e1;
  --rainlin-muted: #94a3b8;
  --rainlin-faint: #64748b;
  --rainlin-line: rgba(148, 163, 184, 0.16);
  --rainlin-line-strong: rgba(148, 163, 184, 0.26);
  --rainlin-code-bg: #1e293b;
  --rainlin-code: #e2e8f0;
  --rainlin-shadow: 0 14px 36px rgba(0, 0, 0, 0.28);
  --rainlin-shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.2);
}

[data-theme='dark'] body {
  background:
    linear-gradient(var(--rainlin-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--rainlin-grid) 1px, transparent 1px),
    var(--rainlin-bg);
  background-size: 26px 26px, 26px 26px, auto;
}

[data-theme='dark'] #nav.show,
[data-theme='dark'] #page-header.nav-fixed #nav {
  background: rgba(15, 23, 42, 0.9);
}

[data-theme='dark'] #nav a,
[data-theme='dark'] #nav .site-page,
[data-theme='dark'] #nav .site-name {
  color: var(--rainlin-ink);
}

[data-theme='dark'] #article-container th {
  background: #1e293b;
}

[data-theme='dark'] #article-container img {
  background: #f8fafc;
}

[data-theme='dark'] .post-copyright,
[data-theme='dark'] .tag_share,
[data-theme='dark'] .relatedPosts {
  background: #1e293b;
}

[data-theme='dark'] #footer {
  background:
    linear-gradient(var(--rainlin-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--rainlin-grid) 1px, transparent 1px),
    #0f172a;
  background-size: 26px 26px, 26px 26px, auto;
}

@media screen and (max-width: 768px) {
  #page-header.full_page {
    height: 40vh;
    min-height: 300px;
    max-height: 380px;
  }

  #page-header #site-title {
    font-size: 2.1rem !important;
  }

  #page-header #site-subtitle {
    padding: 0 1rem;
    font-size: 0.95rem !important;
  }

  #page-header.post-bg #post-info {
    bottom: 2rem;
    padding: 0 1rem;
  }

  #page-header #post-info .post-title {
    margin-bottom: 0.85rem;
    font-size: clamp(1.65rem, 8vw, 2.25rem);
    line-height: 1.28;
  }

  #page-header #post-info #post-meta {
    gap: 0.42rem;
    font-size: 0.78rem;
  }

  #page-header #post-info #post-meta .meta-firstline,
  #page-header #post-info #post-meta .meta-secondline {
    gap: 0.42rem;
  }

  #page-header #post-info #post-meta .meta-firstline > span:not(.post-meta-separator),
  #page-header #post-info #post-meta .meta-secondline > span:not(.post-meta-separator) {
    min-height: 1.8rem;
    padding: 0.22rem 0.5rem;
  }

  .layout {
    margin-top: 1.5rem;
  }

  #post,
  #page {
    padding: 1.3rem 1.1rem;
  }

  #article-container {
    font-size: 16px;
    line-height: 1.88;
  }

  #recent-posts > .recent-post-item,
  #aside-content .card-widget,
  #post,
  #page {
    border-radius: 12px;
  }
}