:root {
  color-scheme: light;
  --bg: #edf1ef;
  --paper: #fbfaf6;
  --paper-deep: #f3eee4;
  --paper-warm: #fffdf7;
  --ink: #1d2528;
  --ink-soft: #334046;
  --muted: #667275;
  --line: #d8d0c3;
  --line-strong: #b9a994;
  --cinnabar: #a7332b;
  --cinnabar-strong: #7f211c;
  --jade: #1f6f68;
  --jade-soft: rgba(31, 111, 104, 0.09);
  --indigo: #263f58;
  --gold: #a9792b;
  --code-bg: #f4f0e7;
  --shadow: 0 22px 52px rgba(54, 45, 31, 0.09);
  --shadow-soft: 0 12px 28px rgba(54, 45, 31, 0.07);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, Georgia, serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  letter-spacing: 0;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(167, 51, 43, 0.045) 0 1px, transparent 1px 96px),
    linear-gradient(180deg, rgba(31, 111, 104, 0.045) 0 1px, transparent 1px 96px),
    linear-gradient(180deg, #f5f7f4 0, #edf1ef 390px, #f7f4ee 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background:
    repeating-linear-gradient(0deg, rgba(29, 37, 40, 0.022) 0 1px, transparent 1px 7px),
    repeating-linear-gradient(90deg, rgba(29, 37, 40, 0.018) 0 1px, transparent 1px 11px);
  mix-blend-mode: multiply;
}

.site-ground {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.site-ground::after {
  position: fixed;
  right: -120px;
  bottom: -180px;
  width: min(720px, 62vw);
  height: min(860px, 80vh);
  pointer-events: none;
  background: url("/assets/site/paper-cloud-texture.webp") center / cover no-repeat;
  content: "";
  opacity: 0.13;
  mix-blend-mode: multiply;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header,
main,
.site-footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0 18px;
}

.brand {
  display: inline-grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  min-width: 0;
}

.brand-mark,
.seal {
  display: grid;
  place-items: center;
  border: 2px solid var(--cinnabar);
  background: var(--cinnabar);
  color: #fff8ef;
  font-family: var(--serif);
  font-weight: 800;
  line-height: 1;
}

.brand-mark {
  --seal-tilt: 0deg;

  width: 42px;
  height: 42px;
  border-radius: 8px;
  box-shadow: var(--shadow-soft);
  font-size: 1.45rem;
  transform: rotate(var(--seal-tilt));
  transform-origin: 50% 54%;
}

.brand:hover .brand-mark,
.brand-mark:hover,
.hero-aside .seal:hover {
  animation: sealTremble 520ms ease-out both;
}

.brand-copy {
  display: grid;
  min-width: 0;
  line-height: 1.2;
}

.brand-copy strong {
  color: var(--ink);
  font-size: 1.02rem;
  font-weight: 850;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 650;
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  min-width: 0;
}

.site-header nav a {
  display: grid;
  gap: 2px;
  min-width: 78px;
  padding: 8px 10px;
  border-bottom: 1px solid transparent;
  color: var(--ink-soft);
  text-align: center;
}

.site-header nav a span {
  font-size: 0.92rem;
  font-weight: 800;
}

.site-header nav a small {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 650;
  text-transform: uppercase;
}

.site-header nav a:hover,
.text-link:hover,
.post-card a:hover,
.article-content a:hover,
.va-breadcrumb a:hover {
  color: var(--cinnabar);
}

.site-header nav a:hover {
  border-bottom-color: rgba(167, 51, 43, 0.34);
}

.intro,
.page-heading,
.section-heading {
  position: relative;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 42px;
  align-items: end;
  padding: 76px 0 38px;
  border-top: 1px solid rgba(184, 169, 148, 0.52);
}

.home-hero::after,
.page-heading::after {
  position: absolute;
  left: 0;
  bottom: 20px;
  width: 74px;
  height: 2px;
  background: var(--cinnabar);
  content: "";
}

.hero-copy {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.eyebrow,
.panel-kicker {
  margin: 0;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.intro h1,
.page-heading h1,
.article-header h1,
.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 850;
  letter-spacing: 0;
}

.intro h1 {
  font-size: 5.8rem;
  line-height: 0.98;
}

.hero-lede {
  max-width: 760px;
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.85;
}

.hero-lede span,
.page-heading p span,
.va-heading p span {
  display: block;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.98rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-top: 8px;
}

.text-link {
  color: var(--jade);
  font-weight: 800;
}

.strong-link {
  color: var(--cinnabar-strong);
}

.hero-aside {
  position: relative;
  display: grid;
  gap: 14px;
  justify-items: start;
  padding: 0 0 6px 24px;
  border-left: 1px solid var(--line-strong);
}

.hero-art {
  position: relative;
  width: min(100%, 300px);
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(184, 169, 148, 0.82);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero-art img {
  display: block;
  width: 100%;
  height: 178px;
  object-fit: cover;
  object-position: 56% 50%;
  transition: filter 220ms ease, transform 260ms ease;
}

.hero-art:hover img,
.hero-art:focus-within img {
  filter: saturate(0.88) contrast(0.95);
  transform: scale(1.015);
}

@keyframes sealTremble {
  0% {
    transform: rotate(var(--seal-tilt)) translate3d(0, 0, 0);
  }

  16% {
    transform: rotate(calc(var(--seal-tilt) - 4deg)) translate3d(-1px, 1px, 0);
  }

  32% {
    transform: rotate(calc(var(--seal-tilt) + 3deg)) translate3d(2px, -1px, 0);
  }

  48% {
    transform: rotate(calc(var(--seal-tilt) - 2deg)) translate3d(-1px, 0, 0);
  }

  68% {
    transform: rotate(calc(var(--seal-tilt) + 1deg)) translate3d(1px, 1px, 0);
  }

  100% {
    transform: rotate(var(--seal-tilt)) translate3d(0, 0, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand-mark,
  .hero-aside .seal,
  .hero-art img {
    animation: none !important;
    transition: none !important;
  }

  .hero-art:hover img,
  .hero-art:focus-within img {
    transform: none;
  }
}

.hero-aside .seal {
  --seal-tilt: -6deg;

  position: absolute;
  top: 18px;
  right: 16px;
  width: 42px;
  height: 42px;
  border-radius: 6px;
  box-shadow: 0 10px 20px rgba(94, 31, 24, 0.16);
  opacity: 0.9;
  transform: rotate(var(--seal-tilt));
  transform-origin: 50% 54%;
  font-size: 1.36rem;
}

.hero-aside p,
.hero-aside small {
  margin: 0;
}

.hero-aside p {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 800;
}

.hero-aside small {
  color: var(--muted);
  line-height: 1.55;
}

.section-heading {
  display: grid;
  gap: 8px;
  max-width: 720px;
  padding: 8px 0 22px;
}

.section-heading h2 {
  font-size: 2rem;
}

.section-heading p:last-child,
.page-heading > p:last-child,
.va-detail-heading p:last-child {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.75;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 312px;
  gap: 28px;
  align-items: start;
  margin-top: 8px;
}

.post-list {
  display: grid;
  gap: 14px;
}

.post-list.compact {
  max-width: 820px;
}

.post-card,
.article-shell,
.va-algorithm-link,
.va-workbench-main,
.va-workbench-controls,
.va-text-result,
.comment-item {
  border: 1px solid rgba(184, 169, 148, 0.68);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(251, 250, 246, 0.96)),
    var(--paper);
  box-shadow: var(--shadow-soft);
}

.post-card {
  position: relative;
  display: grid;
  gap: 10px;
  min-height: 136px;
  padding: 20px 22px 20px 26px;
  overflow: hidden;
}

.post-card::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--jade);
  content: "";
  opacity: 0.72;
}

.post-card:hover {
  border-color: rgba(167, 51, 43, 0.34);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.post-meta span {
  color: var(--gold);
  text-transform: uppercase;
}

.post-card time,
.archive-group time,
.article-header time {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.post-card h2 {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.4rem;
  line-height: 1.42;
  overflow-wrap: anywhere;
}

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

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

.tag-row a,
.tag-cloud a,
.tag-index a {
  border: 1px solid rgba(31, 111, 104, 0.24);
  border-radius: 999px;
  color: var(--jade);
  background: var(--jade-soft);
  font-size: 0.84rem;
  font-weight: 760;
}

.tag-row a,
.tag-cloud a {
  display: inline-flex;
  padding: 5px 10px;
}

.tag-row a:hover,
.tag-cloud a:hover,
.tag-index a:hover {
  border-color: rgba(167, 51, 43, 0.32);
  color: var(--cinnabar-strong);
  background: rgba(167, 51, 43, 0.07);
}

.side-panel {
  position: sticky;
  top: 20px;
  display: grid;
  gap: 24px;
  padding: 2px 0 0 22px;
  border-left: 1px solid rgba(184, 169, 148, 0.72);
  background: transparent;
  box-shadow: none;
}

.side-panel section {
  display: grid;
  gap: 10px;
}

.side-panel h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.08rem;
}

.side-panel .tag-cloud a {
  border-color: rgba(31, 111, 104, 0.18);
  background: rgba(31, 111, 104, 0.045);
  color: rgba(31, 111, 104, 0.9);
}

.panel-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-heading {
  display: grid;
  gap: 10px;
  padding: 58px 0 44px;
  border-top: 1px solid rgba(184, 169, 148, 0.52);
}

.page-heading h1 {
  font-size: 4.2rem;
  line-height: 1.05;
}

.va-catalog {
  display: grid;
  gap: 28px;
  padding-bottom: 56px;
}

.va-category {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: 28px;
  border-top: 1px solid rgba(184, 169, 148, 0.72);
  padding-top: 26px;
}

.va-category h2 {
  margin: 0 0 8px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.35rem;
}

.va-category p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.va-algorithm-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.va-algorithm-link {
  position: relative;
  display: grid;
  gap: 8px;
  min-height: 118px;
  padding: 18px 18px 18px 20px;
  overflow: hidden;
}

.va-algorithm-link::before {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(167, 51, 43, 0.3);
  border-radius: 50%;
  content: "";
}

.va-algorithm-link:hover {
  border-color: rgba(167, 51, 43, 0.42);
  color: var(--cinnabar-strong);
}

.va-algorithm-link strong {
  max-width: calc(100% - 44px);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.08rem;
}

.va-algorithm-link span {
  color: var(--muted);
  line-height: 1.58;
}

.va-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.va-breadcrumb a {
  color: var(--jade);
  font-weight: 750;
}

.va-workbench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 20px;
  align-items: start;
  padding-bottom: 64px;
}

.va-workbench-main {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.va-display {
  display: grid;
  gap: 12px;
}

.va-canvas {
  display: block;
  width: 100%;
  min-height: 420px;
  border: 1px solid rgba(31, 111, 104, 0.2);
  border-radius: 6px;
  background: #fff;
}

.va-workbench-controls {
  position: sticky;
  top: 20px;
  padding: 16px;
}

.va-controls {
  display: grid;
  gap: 12px;
}

.va-control-item {
  margin-bottom: 0;
}

.va-control-item .el-input-number,
.va-control-item .el-select,
.va-control-item .el-input {
  width: 100%;
}

.va-control-item .el-slider {
  --el-slider-main-bg-color: var(--jade);
  width: 100%;
}

.va-control-item .el-slider__runway,
.va-playback-progress .el-slider__runway {
  height: 6px;
  background: #d9ddd6;
}

.va-control-item .el-slider__bar,
.va-playback-progress .el-slider__bar {
  height: 6px;
  background: var(--jade);
}

.va-control-item .el-slider__button {
  border-color: var(--jade);
}

.va-control-item .el-slider__input {
  width: 82px;
  margin-left: 0;
}

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

.va-slider-row {
  display: grid;
  gap: 6px;
}

.va-slider-row .el-slider {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) 88px;
  gap: 14px;
  align-items: center;
}

.va-slider-row .el-slider__runway {
  min-width: 150px;
}

.va-slider-row > span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.va-point-list {
  display: grid;
  gap: 8px;
}

.va-point-row {
  display: grid;
  grid-template-columns: 48px 1fr 1fr;
  gap: 8px;
  align-items: center;
}

.va-point-row > span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.va-point-row .el-input-number {
  width: 100%;
}

.va-lake-matrix-editor,
.va-path-matrix-editor {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.va-path-mode {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(29, 37, 40, 0.12);
  border-radius: 6px;
  background: #f5f4ee;
}

.va-path-mode-button {
  min-width: 0;
  padding: 7px 6px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 800;
}

.va-path-mode-button.is-active {
  background: var(--jade);
  color: #fff;
}

.va-lake-grid,
.va-path-grid {
  display: grid;
  gap: 4px;
  width: min(100%, 260px);
  padding: 8px;
  border: 1px solid rgba(31, 111, 104, 0.2);
  border-radius: 6px;
  background: #f5f4ee;
}

.va-lake-cell,
.va-path-cell {
  display: grid;
  place-items: center;
  min-width: 0;
  aspect-ratio: 1;
  border: 1px solid rgba(29, 37, 40, 0.16);
  border-radius: 4px;
  background: #eef4ef;
  color: rgba(29, 37, 40, 0.54);
  cursor: pointer;
  font: 700 0.82rem/1 var(--mono);
  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.va-lake-cell:hover,
.va-lake-cell:focus-visible,
.va-path-cell:hover,
.va-path-cell:focus-visible {
  border-color: var(--cinnabar);
  box-shadow: 0 0 0 2px rgba(167, 51, 43, 0.14);
  outline: none;
  transform: translateY(-1px);
}

.va-lake-cell.is-water {
  background: #78b8c2;
  color: #133f42;
}

.va-path-cell.is-start {
  background: #74b98d;
  color: #123c2b;
}

.va-path-cell.is-end {
  background: #d88478;
  color: #612018;
}

.va-path-cell.is-wall {
  background: #35444b;
  color: #fff;
}

.va-path-cell.is-open {
  background: #eef4ef;
  color: rgba(29, 37, 40, 0.54);
}

.va-lake-legend,
.va-path-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 0.82rem;
}

.va-lake-legend span,
.va-path-legend span {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.va-lake-legend i,
.va-path-legend i {
  width: 12px;
  height: 12px;
  border: 1px solid rgba(29, 37, 40, 0.16);
  border-radius: 3px;
  background: #eef4ef;
}

.va-lake-legend i.is-water {
  background: #78b8c2;
}

.va-path-legend i.is-start {
  background: #74b98d;
}

.va-path-legend i.is-end {
  background: #d88478;
}

.va-path-legend i.is-wall {
  background: #35444b;
}

.va-ip-editor {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.va-ip-control {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 6px;
  align-items: center;
  min-width: 0;
}

.va-ip-control .el-input-number {
  width: 100%;
  min-width: 0;
}

.va-ip-control .el-input-number .el-input__wrapper {
  padding-left: 4px;
  padding-right: 4px;
}

.va-ip-dot {
  color: var(--muted);
  font-weight: 800;
  line-height: 1;
}

.va-help {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.va-control-actions {
  display: flex;
  gap: 10px;
}

.va-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  border: 1px solid rgba(31, 111, 104, 0.18);
  border-radius: 6px;
  background: var(--jade-soft);
  padding: 10px 12px;
  color: var(--jade);
}

.va-status span {
  color: var(--muted);
}

.va-playback {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 112px;
  gap: 14px;
  align-items: center;
  border: 1px solid rgba(31, 111, 104, 0.18);
  border-radius: 6px;
  background: rgba(245, 244, 238, 0.9);
  padding: 10px 12px;
}

.va-playback-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.va-playback-actions .el-button {
  width: 34px;
  height: 34px;
}

.va-playback-progress {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.va-frame-index,
.va-playback-speed span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;
}

.va-playback-progress .el-slider__runway {
  min-width: 0;
}

.va-playback-speed {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.va-text-result {
  padding: 14px;
}

.va-text-result h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 1rem;
}

.va-frame-summary {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
  border: 1px solid rgba(31, 111, 104, 0.16);
  border-radius: 6px;
  background: var(--jade-soft);
  padding: 10px;
}

.va-frame-summary strong {
  color: var(--jade);
  font-size: 0.95rem;
}

.va-frame-summary p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.va-frame-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(126px, 1fr));
  gap: 8px;
  margin: 0;
}

.va-frame-metric {
  min-width: 0;
  border: 1px solid rgba(31, 111, 104, 0.12);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
  padding: 8px 9px;
}

.va-frame-metrics dt,
.va-frame-metrics dd {
  margin: 0;
  min-width: 0;
}

.va-frame-metrics dt {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 750;
  overflow-wrap: anywhere;
}

.va-frame-metrics dd {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  margin-top: 4px;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.va-text-result ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.archive-list {
  display: grid;
  gap: 30px;
  max-width: 860px;
  padding-bottom: 42px;
}

.archive-group h2 {
  margin: 0 0 12px;
  color: var(--cinnabar-strong);
  font-family: var(--serif);
}

.archive-group ol {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.archive-group li {
  display: grid;
  grid-template-columns: 124px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid rgba(184, 169, 148, 0.6);
}

.archive-group a {
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 800;
  overflow-wrap: anywhere;
}

.tag-index {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
  padding-bottom: 42px;
}

.tag-index a {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
}

.article-shell {
  max-width: 900px;
  margin: 38px auto 0;
  padding: 0;
  overflow: hidden;
}

.article-header {
  display: grid;
  gap: 14px;
  padding: 42px 46px 30px;
  border-bottom: 1px solid rgba(184, 169, 148, 0.68);
  background:
    linear-gradient(90deg, rgba(167, 51, 43, 0.08) 0 4px, transparent 4px),
    url("/assets/site/paper-cloud-texture.webp") right -240px top -360px / 680px auto no-repeat,
    rgba(255, 253, 247, 0.72);
}

.article-header h1 {
  font-size: 3.2rem;
  line-height: 1.16;
  overflow-wrap: anywhere;
}

.article-content {
  padding: 34px 46px 6px;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.92;
}

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

.article-content :where(h1, h2, h3, h4) {
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.28;
}

.article-content h1 {
  margin-top: 1.9em;
  font-size: 1.9rem;
}

.article-content h2 {
  margin-top: 2.2em;
  font-size: 1.55rem;
}

.article-content h3,
.article-content h4 {
  margin-top: 2em;
  font-size: 1.22rem;
}

.article-content p,
.article-content li {
  overflow-wrap: anywhere;
}

.article-content a {
  color: var(--cinnabar-strong);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.article-content blockquote {
  margin: 26px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--cinnabar);
  background: rgba(167, 51, 43, 0.07);
  color: var(--ink-soft);
}

.article-content pre {
  overflow-x: auto;
  padding: 20px;
  border: 1px solid rgba(185, 169, 148, 0.58);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 253, 247, 0.78), rgba(244, 240, 231, 0.96)),
    var(--code-bg) !important;
  color: #101820 !important;
  box-shadow:
    inset 0 0 0 1px rgba(255, 253, 247, 0.72),
    0 12px 24px rgba(54, 45, 31, 0.06);
  -webkit-text-fill-color: #101820 !important;
}

.article-content pre code,
.article-content pre code *,
.article-content pre * {
  color: #101820 !important;
  opacity: 1 !important;
  text-shadow: none !important;
  -webkit-text-fill-color: #101820 !important;
}

.article-content pre code,
.article-content pre span {
  color: #101820 !important;
  opacity: 1 !important;
  text-shadow: none !important;
  -webkit-text-fill-color: #101820 !important;
}

.article-content code {
  font-family: var(--mono);
  font-size: 0.92em;
  line-height: 1.72;
}

.article-content :not(pre) > code {
  padding: 0.14em 0.34em;
  border-radius: 5px;
  background: rgba(31, 111, 104, 0.1);
  color: var(--jade);
}

.article-content table {
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  font-family: var(--sans);
}

.article-content th,
.article-content td {
  padding: 8px 10px;
  border: 1px solid var(--line);
}

.article-content img {
  display: block;
  margin: 22px auto;
  border-radius: 6px;
}

.engagement-panel {
  display: grid;
  gap: 18px;
  margin: 36px 46px 42px;
  padding-top: 28px;
  border-top: 1px solid rgba(184, 169, 148, 0.68);
}

.engagement-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.engagement-header h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.35rem;
}

.engagement-header .el-button {
  min-width: 92px;
}

.engagement-error,
.comment-empty {
  margin: 0;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 0.92rem;
  line-height: 1.6;
}

.engagement-error {
  border: 1px solid rgba(167, 51, 43, 0.24);
  background: rgba(167, 51, 43, 0.09);
  color: var(--cinnabar-strong);
}

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

.comment-item {
  display: grid;
  gap: 8px;
  padding: 14px;
}

.comment-item header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

.comment-item strong {
  color: var(--jade);
  font-weight: 800;
}

.comment-item time,
.comment-item header span {
  color: var(--muted);
  font-size: 0.84rem;
}

.comment-item p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.75;
  white-space: pre-wrap;
}

.comment-empty {
  border: 1px dashed var(--line-strong);
  color: var(--muted);
}

.comment-form {
  display: grid;
  gap: 12px;
}

.comment-form .el-form-item {
  margin-bottom: 0;
}

.comment-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.comment-actions > span {
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 56px 0 30px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .home-hero {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-aside {
    max-width: 520px;
  }

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

  .side-panel,
  .va-workbench-controls {
    position: static;
  }

  .side-panel {
    padding: 20px 0 0;
    border-top: 1px solid rgba(184, 169, 148, 0.72);
    border-left: 0;
  }
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header nav {
    justify-content: flex-start;
    flex-wrap: wrap;
    width: 100%;
  }

  .site-header nav a {
    min-width: 0;
    width: calc(50% - 4px);
    gap: 1px;
    padding: 7px 8px;
    text-align: left;
  }

  .site-header nav a small {
    display: block;
    font-size: 0.58rem;
    line-height: 1;
    opacity: 0.72;
  }

  .intro h1 {
    font-size: 3.35rem;
  }

  .page-heading h1 {
    font-size: 2.9rem;
  }

  .home-hero {
    padding: 48px 0 38px;
  }

  .hero-aside {
    padding-left: 18px;
  }

  .va-category,
  .va-workbench {
    grid-template-columns: 1fr;
  }

  .va-algorithm-list {
    grid-template-columns: 1fr;
  }

  .va-workbench-controls {
    order: 2;
  }

  .va-workbench-main {
    order: 1;
  }

  .va-canvas {
    min-height: 300px;
  }

  .va-playback,
  .va-playback-progress {
    grid-template-columns: 1fr;
  }

  .va-playback-speed {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .va-slider-row .el-slider {
    grid-template-columns: minmax(120px, 1fr) 82px;
    gap: 8px;
  }

  .va-slider-row .el-slider__runway {
    min-width: 120px;
  }

  .va-ip-control {
    gap: 4px;
  }

  .archive-group li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .article-shell {
    width: calc(100% + 8px);
    margin-left: -4px;
    margin-right: -4px;
  }

  .article-header,
  .article-content {
    padding-left: 24px;
    padding-right: 24px;
  }

  .article-header h1 {
    font-size: 2.12rem;
  }

  .engagement-panel {
    margin-left: 24px;
    margin-right: 24px;
  }

  .engagement-header,
  .comment-item header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 460px) {
  .site-header,
  main,
  .site-footer {
    width: min(100% - 24px, 1120px);
  }

  .site-ground::before {
    display: none;
  }

  .site-ground::after {
    width: 480px;
    height: 600px;
    opacity: 0.09;
  }

  .brand {
    grid-template-columns: 38px minmax(0, 1fr);
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .intro h1 {
    font-size: 2.7rem;
  }

  .hero-lede {
    font-size: 1.04rem;
  }

  .page-heading h1 {
    font-size: 2.35rem;
  }

  .post-card {
    padding: 18px 18px 18px 22px;
  }

  .post-card h2 {
    font-size: 1.22rem;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header nav a {
    width: calc(50% - 4px);
  }

  .site-header nav a small {
    font-size: 0.54rem;
  }
}