:root {
  --bg: #fff7d6;
  --surface: #fffefa;
  --surface-2: #e8fff4;
  --surface-3: #fff2f7;
  --ink: #282231;
  --text: #3c3448;
  --muted: #7a7086;
  --line: #efdba7;
  --line-strong: #d8b866;
  --primary: #00a6a6;
  --primary-soft: #dffcf4;
  --accent: #ff4f8b;
  --accent-soft: #ffe3ee;
  --sun: #ffd84d;
  --sky: #38bdf8;
  --violet: #7c5cff;
  --leaf: #43c66f;
  --code-bg: #211b2d;
  --code-ink: #fff9f1;
  --shadow-sm: 0 2px 0 rgba(40, 34, 49, 0.08);
  --shadow-md: 0 16px 38px rgba(255, 79, 139, 0.16), 0 5px 0 rgba(40, 34, 49, 0.08);
  --content: 1120px;
  --article: 800px;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, #fff0a8 0, rgba(255, 247, 214, 0.92) 260px, #fff7fb 680px, #ffffff 100%);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.74;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

:focus-visible {
  outline: 3px solid rgba(255, 79, 139, 0.38);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  transform: translateY(-140%);
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--primary);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-shell {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--content);
  margin: 0 auto;
  padding: 14px 24px;
  background: rgba(255, 247, 214, 0.86);
  border-bottom: 1px solid rgba(216, 184, 102, 0.55);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 12px;
  background: var(--sun);
  color: var(--ink);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 16px;
  font-weight: 600;
}

.brand-text {
  display: grid;
  line-height: 1.16;
}

.brand-name {
  font-family: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  font-weight: 700;
}

.brand-subtitle {
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 11px;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 8px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  transition: color 180ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 8px;
  left: 0;
  height: 2px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--accent);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
}

.site-main {
  max-width: var(--content);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.hero-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  gap: 40px;
  align-items: stretch;
  padding: 34px 0 46px;
  border-bottom: 1px solid var(--line);
}

.hero-panel::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 5px;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--accent), var(--sun), var(--leaf), var(--sky), var(--violet));
  content: "";
}

.eyebrow,
.section-heading p,
.article-meta,
.post-card-meta,
.side-card span,
.system-board p {
  margin: 0;
  color: var(--primary);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-copy h1,
.page-header h1,
.article-header h1 {
  max-width: 900px;
  margin: 12px 0 16px;
  font-family: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(36px, 5.4vw, 64px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy h1 {
  color: var(--ink);
  text-wrap: balance;
}

.hero-copy p:last-of-type {
  max-width: 700px;
  margin: 0;
  color: var(--text);
  font-size: 18px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.hero-actions a,
.side-link,
.pager a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 12px;
  border: 0;
  border-radius: 7px;
  background: rgba(255, 254, 250, 0.82);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  box-shadow: 3px 3px 0 rgba(40, 34, 49, 0.08);
  transition: color 180ms ease, background 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.hero-actions a::after,
.side-link::after,
.pager a::after {
  content: none;
}

.hero-actions a:first-child {
  background: linear-gradient(180deg, #fff8fb, var(--accent-soft));
  color: var(--accent);
}

.hero-actions a:nth-child(2),
.pager a,
.side-link {
  color: var(--muted);
}

.hero-actions a:hover,
.side-link:hover,
.pager a:hover {
  background: #eeeaff;
  color: var(--violet);
  box-shadow: 4px 4px 0 rgba(124, 92, 255, 0.14);
  transform: translateY(-1px);
}

.system-board {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 18px;
  border: 0;
  border-radius: var(--radius);
  background: rgba(255, 254, 250, 0.92);
  box-shadow: var(--shadow-md);
}

.system-board a {
  display: grid;
  gap: 3px;
  min-height: 72px;
  padding: 15px 16px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, #fffefa, #fff2f7);
  box-shadow: 0 2px 0 rgba(40, 34, 49, 0.06);
  transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.system-board a:hover {
  background: var(--surface-3);
  box-shadow: 0 5px 0 rgba(255, 79, 139, 0.16);
  transform: translateY(-2px);
}

.system-board a:nth-of-type(2):hover {
  background: #eefaff;
}

.system-board a:nth-of-type(3):hover {
  background: #effff4;
}

.system-board strong {
  font-size: 15px;
}

.system-board span {
  color: var(--muted);
  font-size: 13px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin: 42px 0 18px;
}

.section-heading h2 {
  margin: 0;
  font-family: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
}

.post-list {
  display: grid;
  gap: 12px;
}

.post-list.compact {
  margin-top: 24px;
}

.post-card {
  position: relative;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 254, 250, 0.98), rgba(255, 242, 247, 0.78));
  box-shadow: 0 3px 0 rgba(40, 34, 49, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.post-card::before {
  position: absolute;
  top: 14px;
  left: 14px;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
  content: "";
  opacity: 0.8;
  transform: scale(1);
  transition: transform 180ms ease, background 180ms ease, opacity 180ms ease;
}

.post-card:hover {
  background: var(--surface);
  box-shadow: 0 16px 36px rgba(255, 79, 139, 0.14), 0 5px 0 rgba(40, 34, 49, 0.08);
  transform: translateY(-3px);
}

.post-card:hover::before {
  background: var(--accent);
  opacity: 1;
  transform: scale(1.28);
}

.post-card:nth-child(3n + 2)::before {
  background: var(--sky);
}

.post-card:nth-child(3n + 3)::before {
  background: var(--leaf);
}

.post-card:nth-child(4n)::before {
  background: var(--violet);
}

.post-card-link {
  display: grid;
  gap: 10px;
  padding: 24px 24px 24px 42px;
}

.post-card-meta,
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
}

.post-card h2 {
  margin: 0;
  font-family: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 700;
  line-height: 1.22;
}

.post-card p {
  display: -webkit-box;
  max-width: 780px;
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-row span,
.tag-row a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 3px 10px;
  border: 0;
  border-radius: 6px;
  background: rgba(255, 254, 250, 0.74);
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
}

.tag-row span::before,
.tag-row a::before {
  content: "#";
  color: var(--primary);
}

.tag-row span::after,
.tag-row a::after {
  content: none;
}

.tag-row a:hover,
.tag-row span:hover {
  color: var(--primary);
}

.pager {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 28px;
}

.article-page,
.page-content {
  padding-top: 16px;
}

.article-header,
.page-header {
  max-width: 940px;
  margin-bottom: 30px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.article-grid {
  display: grid;
  grid-template-columns: 190px minmax(0, var(--article));
  gap: 44px;
  align-items: start;
}

.article-side {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 12px;
}

.side-card {
  padding: 14px;
  border: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 254, 250, 0.96), rgba(232, 255, 244, 0.8));
  box-shadow: 0 3px 0 rgba(40, 34, 49, 0.08);
}

.side-card strong {
  display: block;
  margin-top: 8px;
  font-size: 16px;
  line-height: 1.35;
}

.side-link {
  width: 100%;
}

.article-content {
  min-width: 0;
  color: var(--ink);
}

.article-content > :first-child {
  margin-top: 0;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  margin: 42px 0 12px;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.25;
}

.article-content h1 {
  font-size: 34px;
}

.article-content h2 {
  padding-bottom: 8px;
  border-bottom: 3px solid var(--sun);
  font-size: 27px;
}

.article-content h3 {
  font-size: 22px;
}

.article-content p,
.article-content li {
  color: var(--text);
}

.article-content p {
  margin: 14px 0;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.article-content blockquote {
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid rgba(255, 79, 139, 0.16);
  border-left: 6px solid var(--accent);
  border-radius: var(--radius);
  background: var(--primary-soft);
  color: var(--text);
}

.article-content table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.article-content th,
.article-content td {
  border: 1px solid var(--line);
  padding: 9px 11px;
}

.article-content th {
  background: var(--surface-2);
}

.article-content code {
  padding: 2px 5px;
  border-radius: 5px;
  background: #fff0b8;
  color: #8b4c00;
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 0.88em;
}

.article-content pre {
  overflow-x: auto;
  margin: 22px 0;
  padding: 16px;
  border: 1px solid #223043;
  border-radius: var(--radius);
  background: var(--code-bg);
  color: var(--code-ink);
}

.article-content pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.article-content figure.highlight {
  overflow: hidden;
  margin: 22px 0;
  border: 1px solid #223043;
  border-radius: var(--radius);
  background: var(--code-bg);
}

.article-content figure.highlight table {
  display: table;
  width: 100%;
  margin: 0;
  border: 0;
}

.article-content figure.highlight td,
.article-content figure.highlight th {
  border: 0;
  padding: 0;
}

.article-content figure.highlight .gutter {
  width: 1%;
  min-width: 42px;
  padding: 14px 9px;
  background: rgba(255, 255, 255, 0.05);
  color: rgba(239, 246, 255, 0.45);
  text-align: right;
  user-select: none;
}

.article-content figure.highlight .code {
  padding: 14px;
  color: var(--code-ink);
}

.article-content figure.highlight pre {
  margin: 0;
  padding: 0;
  border: 0;
}

.columns-board {
  display: grid;
  gap: 16px;
  max-width: 860px;
}

.columns-intro {
  display: grid;
  gap: 8px;
  max-width: 680px;
  margin-bottom: 8px;
}

.columns-intro span,
.column-kicker {
  color: var(--primary);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.columns-intro p {
  margin: 0;
  color: var(--text);
  font-size: 18px;
  line-height: 1.72;
}

.columns-queue {
  display: grid;
  gap: 10px;
}

.column-track {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 18px;
  border-radius: var(--radius);
  background: rgba(255, 254, 250, 0.78);
  box-shadow: 0 2px 0 rgba(40, 34, 49, 0.06);
  transition: background 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.column-track:hover {
  background: rgba(255, 254, 250, 0.96);
  box-shadow: 0 10px 24px rgba(255, 79, 139, 0.12), 0 3px 0 rgba(40, 34, 49, 0.06);
  transform: translateY(-2px);
}

.column-index {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 12px;
  background: var(--sun);
  color: var(--ink);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 3px 3px 0 rgba(40, 34, 49, 0.08);
}

.column-track h2 {
  margin: 5px 0 6px;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
}

.column-track p {
  max-width: 640px;
  margin: 0;
  color: var(--text);
}

.is-active-track {
  background: linear-gradient(135deg, rgba(255, 254, 250, 0.94), rgba(255, 227, 238, 0.72));
}

.is-active-track .column-index {
  background: var(--accent);
  color: var(--surface);
}

.columns-queue .column-track:nth-child(1) .column-index {
  background: var(--sky);
}

.columns-queue .column-track:nth-child(2) .column-index {
  background: var(--leaf);
}

.columns-queue .column-track:nth-child(3) .column-index {
  background: var(--violet);
  color: var(--surface);
}

.category-board {
  display: grid;
  gap: 18px;
  max-width: 920px;
}

.category-intro {
  display: grid;
  gap: 8px;
  max-width: 680px;
}

.category-intro span,
.category-section-title span {
  color: var(--primary);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.category-intro p {
  margin: 0;
  color: var(--text);
  font-size: 18px;
}

.category-major-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.category-major {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 112px;
  padding: 18px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 254, 250, 0.96), rgba(255, 227, 238, 0.62));
  box-shadow: 0 3px 0 rgba(40, 34, 49, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.category-major:hover {
  background: rgba(255, 254, 250, 0.98);
  box-shadow: 0 14px 30px rgba(255, 79, 139, 0.14), 0 4px 0 rgba(40, 34, 49, 0.08);
  transform: translateY(-2px);
}

.category-token,
.category-dot {
  display: grid;
  place-items: center;
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-weight: 600;
}

.category-token {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--sun);
  color: var(--ink);
  box-shadow: 3px 3px 0 rgba(40, 34, 49, 0.08);
}

.category-major:nth-child(2n) .category-token {
  background: var(--sky);
}

.category-major:nth-child(3n) .category-token {
  background: var(--leaf);
}

.category-major strong {
  min-width: 0;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.1;
}

.category-major em {
  grid-column: 2;
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-style: normal;
}

.category-section-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-top: 8px;
}

.category-section-title strong {
  color: var(--ink);
  font-size: 22px;
}

.category-branch-list {
  display: grid;
  gap: 8px;
}

.category-branch {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  min-height: 68px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 254, 250, 0.72);
  box-shadow: 0 2px 0 rgba(40, 34, 49, 0.06);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.category-branch:hover {
  background: rgba(255, 254, 250, 0.95);
  box-shadow: 0 10px 24px rgba(0, 166, 166, 0.1), 0 3px 0 rgba(40, 34, 49, 0.06);
  transform: translateY(-1px);
}

.category-dot {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
}

.category-branch:nth-child(3n + 2) .category-dot {
  background: #e2f5ff;
  color: #087ca7;
}

.category-branch:nth-child(3n + 3) .category-dot {
  background: #e7ffe9;
  color: #1d8a43;
}

.category-branch strong,
.category-branch small {
  display: block;
}

.category-branch strong {
  color: var(--ink);
  font-size: 17px;
}

.category-branch small {
  color: var(--muted);
  font-size: 13px;
}

.category-branch em {
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-style: normal;
}

.tag-planet-board {
  position: relative;
  max-width: 1040px;
}

.tag-planet-copy {
  position: absolute;
  left: 0;
  top: 28px;
  z-index: 3;
  display: grid;
  gap: 8px;
}

.tag-planet-copy span {
  color: var(--primary);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.tag-planet-copy p {
  max-width: 240px;
  margin: 0;
  color: var(--text);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.25;
}

.tag-sphere-panel {
  position: relative;
  min-height: 500px;
  overflow: hidden;
  border-radius: 0;
}

.tag-sphere-panel::before,
.tag-sphere-panel::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.tag-sphere-panel::before {
  inset: 20px 0 0;
  background-image:
    radial-gradient(circle, rgba(255, 79, 139, 0.24) 1px, transparent 1.7px),
    radial-gradient(circle, rgba(0, 166, 166, 0.22) 1px, transparent 1.7px),
    radial-gradient(circle, rgba(124, 92, 255, 0.2) 1px, transparent 1.7px);
  background-position: 0 0, 21px 24px;
  background-size: 64px 64px, 78px 78px, 96px 96px;
  mask-image: radial-gradient(circle at 56% 48%, #000 0, #000 42%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 56% 48%, #000 0, #000 42%, transparent 72%);
  opacity: 0.42;
}

.tag-sphere-panel::after {
  right: 16%;
  bottom: 28px;
  width: 42%;
  height: 18px;
  border-radius: 50%;
  background: rgba(40, 34, 49, 0.08);
  filter: blur(12px);
  opacity: 0.55;
}

.tag-sphere {
  position: absolute;
  inset: 49% auto auto 56%;
  width: min(440px, 62vw);
  height: min(440px, 62vw);
  border-radius: 50%;
  cursor: grab;
  touch-action: none;
  transform: translate(-50%, -50%);
  transform-style: preserve-3d;
}

.tag-sphere-ring {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 156%;
  height: 54%;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%) rotate(-13deg);
  will-change: transform, opacity;
}

.tag-sphere-ring-back {
  z-index: 0;
  background:
    radial-gradient(circle, rgba(255, 216, 77, 0.58) 0 1.25px, transparent 2.1px),
    radial-gradient(circle, rgba(255, 79, 139, 0.52) 0 1.15px, transparent 2px),
    radial-gradient(circle, rgba(0, 166, 166, 0.44) 0 1.05px, transparent 1.9px),
    radial-gradient(circle, rgba(124, 92, 255, 0.34) 0 0.9px, transparent 1.75px),
    radial-gradient(circle, rgba(255, 255, 255, 0.38) 0 0.6px, transparent 1.35px);
  background-position: 0 50%, 10px 55%, 20px 46%, 30px 59%, 38px 51%;
  background-size: 25px 14px, 29px 16px, 33px 15px, 37px 17px, 21px 13px;
  filter: blur(0.18px) drop-shadow(0 0 7px rgba(255, 79, 139, 0.16));
  mask-image: radial-gradient(ellipse at center, transparent 0 45%, rgba(0, 0, 0, 0.18) 49%, #000 55% 64%, rgba(0, 0, 0, 0.24) 70%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, transparent 0 45%, rgba(0, 0, 0, 0.18) 49%, #000 55% 64%, rgba(0, 0, 0, 0.24) 70%, transparent 80%);
  opacity: 0.86;
}

.tag-sphere-ring-front {
  z-index: 540;
  background:
    radial-gradient(circle, rgba(255, 216, 77, 0.88) 0 1.65px, transparent 2.55px),
    radial-gradient(circle, rgba(255, 79, 139, 0.92) 0 1.75px, transparent 2.65px),
    radial-gradient(circle, rgba(0, 166, 166, 0.76) 0 1.45px, transparent 2.45px),
    radial-gradient(circle, rgba(255, 255, 255, 0.84) 0 0.85px, transparent 1.75px),
    radial-gradient(circle, rgba(124, 92, 255, 0.58) 0 1.15px, transparent 2.1px);
  background-position: 5px 56%, 16px 61%, 27px 51%, 38px 65%, 48px 57%;
  background-size: 27px 14px, 31px 16px, 35px 15px, 24px 13px, 39px 17px;
  clip-path: polygon(2% 38%, 98% 38%, 93% 90%, 7% 90%);
  filter: blur(0.12px) drop-shadow(0 0 8px rgba(255, 79, 139, 0.2));
  mask-image: radial-gradient(ellipse at center, transparent 0 44%, rgba(0, 0, 0, 0.22) 49%, #000 55% 65%, rgba(0, 0, 0, 0.28) 72%, transparent 82%);
  -webkit-mask-image: radial-gradient(ellipse at center, transparent 0 44%, rgba(0, 0, 0, 0.22) 49%, #000 55% 65%, rgba(0, 0, 0, 0.28) 72%, transparent 82%);
  opacity: 0.92;
}

.tag-sphere.is-dragging {
  cursor: grabbing;
}

.tag-sphere-node {
  position: absolute;
  top: 50%;
  left: 50%;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  max-width: 240px;
  padding: 5px 2px;
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-size: var(--tag-size, 14px);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  letter-spacing: 0;
  text-shadow:
    0 2px 0 rgba(255, 255, 255, 0.82),
    0 10px 22px rgba(40, 34, 49, 0.14);
  will-change: transform, opacity;
  transition: color 160ms ease, text-shadow 160ms ease;
}

.tag-sphere-node:nth-child(4n + 1) {
  color: #e83f7b;
}

.tag-sphere-node:nth-child(4n + 2) {
  color: #008f8f;
}

.tag-sphere-node:nth-child(4n + 3) {
  color: #167ab8;
}

.tag-sphere-node:nth-child(4n) {
  color: #6f54da;
}

.tag-sphere-node:hover {
  color: var(--accent);
  text-shadow: 0 2px 0 rgba(255, 255, 255, 0.86), 0 0 18px rgba(255, 79, 139, 0.28);
}

.tag-sphere-stats {
  position: absolute;
  right: 0;
  bottom: 10px;
  display: grid;
  justify-items: end;
  gap: 1px;
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  text-transform: uppercase;
}

.tag-sphere-stats strong {
  color: var(--ink);
  font-size: 34px;
  line-height: 1;
}

.tag-sphere-stats em {
  color: var(--accent);
  font-style: normal;
}

.tag-index {
  display: grid;
  gap: 16px;
  margin-top: 10px;
}

.tag-index-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.tag-index-head span {
  color: var(--primary);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.tag-index-head strong {
  color: var(--ink);
  font-size: 18px;
}

.tag-index-list {
  columns: 3 220px;
  column-gap: 34px;
}

.tag-index-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  min-height: 32px;
  margin-bottom: 6px;
  break-inside: avoid;
  color: var(--text);
  font-size: 15px;
  line-height: 1.25;
  transition: color 160ms ease, transform 160ms ease;
}

.tag-index-item::before {
  color: var(--accent);
  content: "#";
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-weight: 600;
  transform: translateY(-1px);
}

.tag-index-item {
  grid-template-columns: 16px minmax(0, 1fr) auto;
}

.tag-index-item span {
  min-width: 0;
  overflow-wrap: anywhere;
  font-weight: 600;
}

.tag-index-item em {
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  font-style: normal;
}

.tag-index-item:nth-child(4n + 1)::before {
  color: #e83f7b;
}

.tag-index-item:nth-child(4n + 2)::before {
  color: #008f8f;
}

.tag-index-item:nth-child(4n + 3)::before {
  color: #167ab8;
}

.tag-index-item:nth-child(4n)::before {
  color: #6f54da;
}

.tag-index-item:hover {
  color: var(--accent);
  transform: translateX(3px);
}

.tag-index-item:hover em {
  color: var(--accent);
}

.timeline-list {
  display: grid;
  margin-top: 12px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.archive-meta {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.archive-search {
  margin: 6px 0 32px;
  max-width: 560px;
}

.archive-search-field {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: 999px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.archive-search-field:hover {
  border-color: var(--line-strong);
}

.archive-search-field:focus-within {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.archive-search-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-left: 18px;
  color: var(--muted);
  transition: color 0.18s ease;
}

.archive-search-field:focus-within .archive-search-icon {
  color: var(--accent);
}

.archive-search-input {
  flex: 1;
  min-width: 0;
  padding: 13px 20px 13px 12px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: transparent;
  border: none;
  outline: none;
}

.archive-search-input::placeholder {
  color: var(--muted);
}

.archive-search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  margin-right: 4px;
  background-color: var(--muted);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M4 4l8 8M12 4l-8 8' stroke='black' stroke-width='2' stroke-linecap='round'/></svg>") no-repeat center / contain;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M4 4l8 8M12 4l-8 8' stroke='black' stroke-width='2' stroke-linecap='round'/></svg>") no-repeat center / contain;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.archive-search-input::-webkit-search-cancel-button:hover {
  background-color: var(--accent);
}

.archive-search-empty {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.archive-year {
  margin-top: 36px;
  max-width: 940px;
}

.archive-year:first-of-type {
  margin-top: 0;
}

.archive-year-heading {
  margin: 0;
  padding-bottom: 8px;
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 18px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--line);
}

.timeline-item time {
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 13px;
}

.timeline-item span {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

.term-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.term-card {
  display: grid;
  gap: 8px;
  min-height: 108px;
  padding: 16px;
  border: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 254, 250, 0.98), rgba(232, 255, 244, 0.68));
  box-shadow: 0 3px 0 rgba(40, 34, 49, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.term-card:hover {
  background: var(--surface);
  box-shadow: 0 14px 30px rgba(0, 166, 166, 0.12), 0 5px 0 rgba(40, 34, 49, 0.08);
  transform: translateY(-2px);
}

.term-card strong {
  font-size: 22px;
  line-height: 1.2;
}

.term-card span {
  color: var(--muted);
  font-family: "IBM Plex Mono", Consolas, monospace;
  font-size: 12px;
  text-transform: uppercase;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--content);
  margin: 0 auto;
  padding: 28px 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer div {
  display: grid;
  gap: 3px;
}

.back-top {
  color: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 840px) {
  body {
    background:
      linear-gradient(180deg, #fff0a8 0, rgba(255, 247, 214, 0.92) 220px, #fff7fb 640px, #ffffff 100%);
  }

  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero-panel {
    grid-template-columns: 1fr;
  }

  .article-grid {
    grid-template-columns: 1fr;
  }

  .article-side {
    position: static;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .column-track {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
  }

  .column-index {
    width: 40px;
    height: 40px;
  }

  .category-major-list {
    grid-template-columns: 1fr;
  }

  .category-branch {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .category-branch em {
    grid-column: 2;
  }

  .tag-planet-board {
    min-height: 0;
  }

  .tag-planet-copy {
    position: relative;
    top: auto;
    left: auto;
    margin-bottom: 8px;
  }

  .tag-planet-copy p {
    max-width: none;
    font-size: 20px;
  }

  .tag-sphere-panel {
    min-height: 350px;
  }

  .tag-sphere {
    inset: 48% auto auto 50%;
    width: min(300px, 86vw);
    height: min(300px, 86vw);
  }

  .tag-sphere-stats {
    right: 0;
    bottom: 0;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .site-main {
    padding: 28px 18px 56px;
  }

  .site-header {
    padding: 14px 18px;
  }

  .site-nav a {
    min-height: 40px;
  }

  .hero-copy h1,
  .page-header h1,
  .article-header h1 {
    font-size: 32px;
  }

  .post-card-link {
    padding: 20px 18px 20px 36px;
  }
}