:root {
  --bg: #f3f4f7;
  --bg-soft: rgba(255,255,255,0.72);
  --panel: rgba(255,255,255,0.72);
  --panel-strong: rgba(255,255,255,0.88);
  --text: #121318;
  --text-soft: #586070;
  --line: rgba(18,19,24,0.08);
  --shadow: 0 16px 50px rgba(15,23,42,0.08);
  --shadow-hover: 0 24px 70px rgba(15,23,42,0.14);
  --accent: #111111;
  --accent-contrast: #ffffff;
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --container: 1240px;
  --ease: cubic-bezier(.22,1,.36,1);
  --transition: 420ms var(--ease);
  --blur: saturate(1.35) blur(18px);
}

body.theme-dark {
  --bg: #090a0d;
  --bg-soft: rgba(18, 20, 26, 0.72);
  --panel: rgba(18, 20, 26, 0.68);
  --panel-strong: rgba(21, 24, 30, 0.92);
  --text: #f3f5f8;
  --text-soft: #a2acbc;
  --line: rgba(255,255,255,0.09);
  --shadow: 0 16px 50px rgba(0,0,0,0.28);
  --shadow-hover: 0 24px 70px rgba(0,0,0,0.42);
  --accent: #ffffff;
  --accent-contrast: #111111;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.95), transparent 30%),
    radial-gradient(circle at top right, rgba(120, 136, 255, 0.10), transparent 22%),
    linear-gradient(180deg, var(--bg) 0%, color-mix(in srgb, var(--bg) 90%, #d8deea 10%) 100%);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.75;
  transition: background var(--transition), color var(--transition);
}

body.theme-dark {
  background:
    radial-gradient(circle at top left, rgba(255,255,255,0.06), transparent 26%),
    radial-gradient(circle at top right, rgba(120, 136, 255, 0.12), transparent 18%),
    linear-gradient(180deg, #090a0d 0%, #10131a 100%);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
p, ul, ol { margin: 0 0 1rem; }
h1,h2,h3,h4 { line-height: 1.2; margin: 0 0 0.9rem; letter-spacing: -0.02em; }
.container { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; }
.site-shell { min-height: 100vh; display: flex; flex-direction: column; }
.site-main { flex: 1; padding: 24px 0 56px; }
.section-block { margin-top: 28px; }
.glass-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-radius: var(--radius-xl);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}
.glass-panel:hover { box-shadow: var(--shadow-hover); }
.site-header {
  position: sticky;
  top: 12px;
  z-index: 100;
  margin: 12px auto 0;
  width: min(var(--container), calc(100% - 24px));
}
.nav-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 16px 20px;
}
.brand-wrap { display: flex; align-items: center; gap: 14px; min-width: 0; }
.site-title { font-size: 1.15rem; font-weight: 700; display: inline-block; }
.site-tagline { color: var(--text-soft); font-size: 0.92rem; margin: 4px 0 0; }
.site-logo img { width: 42px; height: 42px; object-fit: contain; border-radius: 12px; }
.site-nav { justify-self: center; }
.menu-list, .footer-menu, .footer-links, .simple-list { list-style: none; padding: 0; margin: 0; }
.menu-list { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.menu-list li a, .footer-menu li a, .footer-links li a, .simple-list li a {
  color: var(--text-soft);
  transition: color var(--transition), background var(--transition);
}
.menu-list li a {
  padding: 10px 14px;
  border-radius: 999px;
  display: inline-flex;
}
.menu-list li a:hover, .menu-list .current-menu-item a {
  color: var(--text);
  background: rgba(127,127,127,0.09);
}

.header-actions { display: flex; gap: 10px; align-items: center; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  box-shadow: 0 12px 30px rgba(0,0,0,0.06);
}
.button:hover { transform: translateY(-2px) scale(1.01); }
.button-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: rgba(255,255,255,0.06);
}
.button-ghost {
  background: rgba(127,127,127,0.08);
  color: var(--text);
  border-color: var(--line);
}

.mobile-menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(127,127,127,0.07);
  padding: 0;
  position: relative;
  cursor: pointer;
}
.mobile-menu-toggle span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  transition: transform var(--transition), top var(--transition), opacity var(--transition);
}
.mobile-menu-toggle span:first-child { top: 17px; }
.mobile-menu-toggle span:last-child { top: 27px; }
.mobile-menu-toggle.is-active span:first-child { top: 22px; transform: rotate(45deg); }
.mobile-menu-toggle.is-active span:last-child { top: 22px; transform: rotate(-45deg); }

.hero-grid, .content-layout, .footer-grid, .post-nav-grid {
  display: grid;
  gap: 24px;
}
.hero-grid { grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr); align-items: stretch; }
.hero-copy, .hero-aside { padding: 36px; }
.eyebrow {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(127,127,127,0.09);
  color: var(--text-soft);
  font-size: 0.85rem;
  margin-bottom: 12px;
}
.hero-copy h1 { font-size: clamp(2.2rem, 5vw, 4.6rem); margin-bottom: 16px; }
.hero-description { font-size: 1.05rem; color: var(--text-soft); max-width: 54ch; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 28px;
}
.hero-stats div {
  padding: 18px;
  border-radius: 22px;
  background: rgba(127,127,127,0.06);
  border: 1px solid var(--line);
}
.hero-stats strong { display: block; font-size: 1.6rem; margin-bottom: 4px; }
.hero-stats span { color: var(--text-soft); font-size: 0.92rem; }
.feature-list { list-style: none; padding: 0; margin-top: 20px; }
.feature-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 18px;
}
.section-head h2 { font-size: clamp(1.5rem, 2vw, 2.4rem); }

.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.content-layout { grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.78fr); align-items: start; }
.content-column { min-width: 0; }
.posts-stack { display: grid; gap: 20px; }
.post-card {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  min-height: 260px;
}
.featured-card { grid-template-columns: 1fr; min-height: 100%; }
.post-card-link { position: absolute; inset: 0; z-index: 2; }
.post-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 900ms var(--ease);
}
.post-card:hover .post-card-cover img { transform: scale(1.04); }
.post-card-body {
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
}
.post-card-meta, .article-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--text-soft);
  font-size: 0.9rem;
}
.post-card-title { font-size: clamp(1.32rem, 2vw, 2rem); }
.post-card-excerpt { color: var(--text-soft); }
.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-soft);
  font-size: 0.94rem;
}
.post-card-action { color: var(--text); font-weight: 600; }

.sidebar { display: grid; gap: 20px; position: sticky; top: 110px; }
.widget { padding: 24px; }
.widget-title { font-size: 1.08rem; margin-bottom: 10px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.tag-cloud a {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(127,127,127,0.06);
  color: var(--text-soft);
}
.simple-list li + li { margin-top: 10px; }

.listing-header .glass-panel, .error-panel { padding: 32px; }
.single-layout { display: grid; gap: 20px; }
.single-article { padding: 34px; }
.article-title { font-size: clamp(2rem, 4vw, 3.4rem); margin: 10px 0 18px; }
.article-cover { margin: 22px 0 26px; border-radius: 24px; overflow: hidden; }
.article-content { font-size: 1.04rem; }
.article-content > * + * { margin-top: 1.15em; }
.article-content h2, .article-content h3 { margin-top: 1.5em; }
.article-content img { border-radius: 22px; }
.article-content blockquote {
  margin: 1.5rem 0;
  padding: 18px 20px;
  border-left: 3px solid var(--text);
  background: rgba(127,127,127,0.06);
  border-radius: 18px;
}
.article-tags { margin-top: 28px; color: var(--text-soft); }
.post-nav-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.nav-card { padding: 20px; min-height: 88px; display: flex; align-items: center; }

.comments-area { padding: 28px; }
.comments-header { margin-bottom: 18px; }
.comments-login-tip { color: var(--text-soft); }
.comment-list { list-style: none; padding: 0; margin: 0 0 24px; }
.comment-list .comment {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.comment-author { display: flex; align-items: center; gap: 12px; }
.comment-author img { border-radius: 50%; }
.comment-metadata { font-size: 0.88rem; color: var(--text-soft); margin: 6px 0 10px; }
.comment-reply-title { margin: 28px 0 12px; }
.comment-form label { display: block; margin-bottom: 8px; font-weight: 600; }
.comment-form textarea, .comment-form input[type="text"], .comment-form input[type="email"], .comment-form input[type="url"], .search-field {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(127,127,127,0.06);
  color: var(--text);
  border-radius: 18px;
  padding: 14px 16px;
  font: inherit;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  outline: none;
}
.comment-form textarea:focus, .comment-form input:focus, .search-field:focus {
  border-color: rgba(127,127,127,0.24);
  box-shadow: 0 0 0 4px rgba(127,127,127,0.08);
}
.comment-form p { margin-bottom: 16px; }
.search-form { display: flex; gap: 12px; margin-top: 18px; }
.search-form label { flex: 1; }

.pagination {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.pagination .page-numbers {
  min-width: 44px;
  height: 44px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(127,127,127,0.06);
  color: var(--text-soft);
}
.pagination .current, .pagination a:hover { color: var(--text); background: rgba(127,127,127,0.11); }

.site-footer { padding: 24px 0 26px; }
.footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); padding: 24px; }
.footer-bottom { padding-top: 16px; color: var(--text-soft); font-size: 0.92rem; }

.empty-card { padding: 28px; }
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(28px) scale(0.985);
  transition: opacity 800ms var(--ease), transform 900ms var(--ease);
  will-change: transform, opacity;
}
.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal-on-scroll { opacity: 1; transform: none; }
}

@media (max-width: 1080px) {
  .hero-grid, .content-layout, .footer-grid, .post-nav-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 860px) {
  .nav-row {
    grid-template-columns: auto auto;
    grid-template-areas:
      "brand toggle"
      "nav nav"
      "actions actions";
  }
  .brand-wrap { grid-area: brand; }
  .mobile-menu-toggle { display: inline-flex; grid-area: toggle; justify-self: end; align-items: center; }
  .site-nav {
    grid-area: nav;
    display: none;
    width: 100%;
  }
  .site-nav.is-open { display: block; }
  .menu-list { flex-direction: column; align-items: stretch; padding-top: 8px; }
  .menu-list li a { width: 100%; }
  .header-actions { grid-area: actions; flex-wrap: wrap; }
  .featured-grid { grid-template-columns: 1fr; }
  .post-card { grid-template-columns: 1fr; }
  .post-card-cover { min-height: 220px; }
  .hero-copy, .hero-aside, .single-article, .comments-area, .widget { padding: 24px; }
}

@media (max-width: 640px) {
  .container { width: min(var(--container), calc(100% - 20px)); }
  .site-main { padding-top: 18px; }
  .site-header { top: 8px; width: calc(100% - 16px); }
  .nav-row { padding: 14px; }
  .hero-stats { grid-template-columns: 1fr; }
  .search-form { flex-direction: column; }
  .button, .pagination .page-numbers { min-height: 42px; }
}