.note-page {
  width: min(1380px, calc(100% - 40px));
}

.note-intro {
  display: grid;
  gap: 18px;
}

.note-intro-copy {
  display: grid;
  gap: 10px;
  max-width: 70ch;
}

.note-intro-copy h1,
.note-intro-copy p {
  margin: 0;
}

.note-intro-copy h1 {
  font-size: clamp(34px, 4.8vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.note-intro-copy p {
  color: var(--ink-soft);
  font-size: 17px;
}

.note-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.note-meta span {
  padding: 9px 12px;
  border: 1px solid rgba(12, 36, 57, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--muted);
  font-size: 12px;
}

.note-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.note-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.note-sidebar,
.note-article {
  min-width: 0;
}

.note-sidebar {
  position: sticky;
  top: 106px;
  align-self: start;
  display: grid;
  gap: 14px;
  max-height: calc(100vh - 126px);
  z-index: 6;
}

.note-sidebar > div {
  display: grid;
  gap: 6px;
}

.note-sidebar h2 {
  margin: 0;
  font-size: 16px;
  line-height: 1.35;
}

.note-sidebar p {
  margin: 0;
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}

.note-toc {
  display: grid;
  gap: 6px;
}

.note-toc-shell {
  border: 1px solid rgba(12, 36, 57, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 16px 38px rgba(7, 21, 34, 0.08);
  backdrop-filter: blur(14px);
}

.note-toc-shell summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  cursor: pointer;
  color: var(--ink);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 700;
  list-style: none;
}

.note-toc-shell summary::-webkit-details-marker {
  display: none;
}

.note-toc-shell summary::after {
  content: "收起";
  color: var(--muted);
  font-weight: 600;
  flex: none;
}

.note-toc-shell:not([open]) summary::after {
  content: "展开";
}

.note-toc-shell .note-toc {
  padding: 0 10px 10px;
  max-height: calc(100vh - 240px);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.note-toc a {
  display: block;
  position: relative;
  padding: 8px 10px;
  border-radius: 12px;
  color: var(--ink-soft);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  line-height: 1.5;
  transition: background 0.18s ease, color 0.18s ease;
}

.note-toc a.level-2 {
  padding-left: 12px;
  font-weight: 700;
}

.note-toc a:hover,
.note-toc a.is-active {
  color: var(--ink);
  background: rgba(12, 36, 57, 0.06);
}

.note-toc a.level-3 {
  padding-left: 32px;
  color: var(--muted);
  font-size: 12px;
}

.note-toc a.level-3::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 50%;
  width: 10px;
  height: 1px;
  background: rgba(12, 36, 57, 0.18);
  transform: translateY(-50%);
}

.note-article .note-prose {
  min-width: 0;
}

.note-prose h1,
.note-prose h2,
.note-prose h3,
.note-prose h4 {
  margin: 0;
  color: var(--ink);
}

.note-prose section.level1 > h1 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4.4vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.note-prose section.level2,
.note-prose section.level3,
.note-prose section.level4 {
  margin-top: 28px;
}

.note-prose h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 3.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.note-prose h3 {
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.35;
}

.note-prose h4 {
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.4;
}

.note-prose p,
.note-prose li {
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
}

.note-prose p + p,
.note-prose p + ul,
.note-prose p + ol,
.note-prose ul + p,
.note-prose ol + p,
.note-prose blockquote + p,
.note-prose table + p,
.note-prose p + .math,
.note-prose .math + p,
.note-prose .math + .math,
.note-prose ul + ul,
.note-prose ol + ol {
  margin-top: 14px;
}

.note-prose ul,
.note-prose ol {
  margin: 14px 0 0;
  padding-left: 24px;
}

.note-prose li + li {
  margin-top: 8px;
}

.note-prose blockquote {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid rgba(12, 36, 57, 0.08);
  border-left: 4px solid var(--cyan);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
}

.note-prose blockquote p {
  color: var(--ink-soft);
  font-size: 15px;
}

.note-prose code {
  padding: 0.14em 0.42em;
  border-radius: 8px;
  background: rgba(12, 36, 57, 0.06);
  color: var(--ink);
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  font-size: 0.9em;
}

.note-prose pre {
  overflow: auto;
  margin: 14px 0 0;
  padding: 16px 18px;
  border-radius: 18px;
  background: #0d2233;
}

.note-prose pre code {
  padding: 0;
  background: transparent;
  color: #eff8fb;
}

.note-prose .pdf-text-block {
  margin-top: 14px;
  padding: 18px 20px;
  border: 1px solid rgba(12, 36, 57, 0.08);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.note-prose .pdf-text-block > :first-child {
  margin-top: 0;
}

.note-prose .pdf-text-block > :last-child {
  margin-bottom: 0;
}

.note-prose .pdf-text-block p {
  font-size: 15px;
  line-height: 1.9;
}

.note-prose .pdf-text-block .page-break-label {
  margin-top: 22px;
  color: var(--cyan-deep);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.note-prose .pdf-text-block .page-break-label:first-child {
  margin-top: 0;
}

.note-prose .pdf-text-block .figure-caption-inline {
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
}

.note-prose .ref-marker {
  font-size: 0.72em;
  line-height: 0;
  vertical-align: super;
}

.note-prose .pdf-text-block pre {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(12, 36, 57, 0.08);
  border-radius: 14px;
  background: rgba(12, 36, 57, 0.04);
  color: var(--ink-soft);
  white-space: pre-wrap;
  word-break: break-word;
}

.note-prose .pdf-text-block pre code {
  color: inherit;
}

.note-prose .equation-block {
  margin-top: 14px;
  padding: 16px 18px;
  border: 1px solid rgba(12, 36, 57, 0.08);
  border-radius: 18px;
  background: rgba(247, 251, 252, 0.9);
}

.note-prose .equation-line + .equation-line {
  margin-top: 6px;
}

.note-prose .equation-line {
  overflow-x: auto;
  overflow-y: hidden;
  text-align: center;
}

.note-prose .equation-block mjx-container[display="true"] {
  padding: 8px 0;
}

.note-prose table {
  width: 100%;
  margin-top: 14px;
  border-collapse: collapse;
  min-width: 680px;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

.note-prose .table-wrap,
.note-prose table {
  overflow-x: auto;
}

.note-prose thead th {
  color: #eff8fb;
  background: linear-gradient(135deg, var(--night), var(--night-2));
}

.note-prose th,
.note-prose td {
  padding: 12px 14px;
  border: 1px solid rgba(12, 36, 57, 0.1);
  text-align: left;
  vertical-align: top;
}

.note-prose tbody tr:nth-child(odd) td {
  background: rgba(255, 255, 255, 0.46);
}

.note-prose tbody tr:nth-child(even) td {
  background: rgba(248, 252, 252, 0.8);
}

.note-prose hr {
  margin: 30px 0;
  border: 0;
  border-top: 1px solid rgba(12, 36, 57, 0.12);
}

.note-prose a {
  color: var(--cyan-deep);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.note-prose mjx-container {
  min-width: 0;
  max-width: 100%;
}

.note-prose mjx-container[display="true"] {
  display: block;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 6px 0 4px;
  text-align: center;
}

.note-prose .math.display {
  overflow-x: auto;
  overflow-y: hidden;
}

.note-prose img {
  width: 100%;
  height: auto;
}

.note-prose figure {
  margin: 18px 0;
}

.note-prose figure img {
  display: block;
  border: 1px solid rgba(12, 36, 57, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-card);
}

.note-prose figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
}

.note-prose mjx-container svg {
  width: auto !important;
  height: auto;
  max-width: none;
}

.note-prose mjx-container:not([display="true"]) svg {
  display: inline-block;
  margin: 0;
}

.note-prose mjx-container[display="true"] svg {
  display: block;
  margin: 0 auto;
}

.note-prose .level1 > :first-child,
.note-prose .level2 > :first-child,
.note-prose .level3 > :first-child,
.note-prose .level4 > :first-child {
  scroll-margin-top: 110px;
}

@media (max-width: 1120px) {
  .note-layout {
    grid-template-columns: 1fr;
  }

  .note-sidebar {
    position: fixed;
    top: 112px;
    right: 18px;
    width: min(320px, calc(100vw - 36px));
    max-height: calc(100vh - 132px);
    gap: 0;
    z-index: 28;
    border: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    overflow: visible;
    pointer-events: none;
  }

  .note-sidebar > div {
    display: none;
  }

  .note-sidebar > * {
    pointer-events: auto;
  }

  .note-toc-shell {
    width: max-content;
    margin-left: auto;
    box-shadow: var(--shadow-md);
  }

  .note-toc-shell[open] {
    width: 100%;
  }

  .note-toc-shell .note-toc {
    max-height: calc(100vh - 190px);
  }
}

@media (max-width: 760px) {
  .note-page {
    width: min(100%, calc(100% - 24px));
  }

  .note-intro-copy h1 {
    line-height: 1.1;
  }

  .note-prose p,
  .note-prose li {
    font-size: 15px;
  }

  .note-prose table {
    min-width: 560px;
  }

  .note-sidebar {
    top: 96px;
    left: 12px;
    right: 12px;
    width: auto;
  }

  .note-toc-shell:not([open]) {
    margin-left: auto;
  }

  .note-toc-shell[open] .note-toc {
    max-height: calc(100vh - 176px);
  }

  .note-toc-shell summary {
    padding: 12px;
  }
}

/* UI refresh: align article pages with the new shared shell */
.note-page {
  width: min(1420px, calc(100% - 40px));
}

.note-intro {
  gap: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(248, 252, 252, 0.64)),
    radial-gradient(circle at 88% 14%, rgba(214, 154, 50, 0.12), transparent 22%);
}

.note-intro-copy {
  max-width: 74ch;
}

.note-intro-copy h1 {
  max-width: 10ch;
  font-family: var(--font-display);
  font-size: clamp(40px, 4.6vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.05em;
  text-wrap: balance;
}

.note-intro-copy p {
  max-width: 56ch;
  line-height: 1.82;
}

.note-meta span {
  padding: 9px 14px;
  border-color: rgba(16, 42, 63, 0.07);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.note-layout {
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 28px;
}

.note-sidebar {
  gap: 16px;
}

.note-toc-shell {
  border-color: rgba(16, 42, 63, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.76), rgba(248, 252, 252, 0.68));
  box-shadow: var(--shadow-card);
}

.note-toc a {
  border: 1px solid transparent;
}

.note-toc a:hover,
.note-toc a.is-active {
  background: rgba(26, 179, 179, 0.08);
  border-color: rgba(26, 179, 179, 0.1);
}

.note-article {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(248, 252, 252, 0.66)),
    radial-gradient(circle at 92% 10%, rgba(26, 179, 179, 0.08), transparent 18%);
}

.note-prose p,
.note-prose li,
.note-prose blockquote p {
  line-height: 1.9;
}

.note-prose blockquote {
  border-left-width: 0;
  box-shadow: var(--shadow-card);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(248, 252, 252, 0.72)),
    radial-gradient(circle at 8% 20%, rgba(26, 179, 179, 0.1), transparent 18%);
}

.note-prose table {
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

@media (max-width: 1120px) {
  .note-page {
    width: min(100%, calc(100% - 28px));
  }

  .note-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .note-article {
    width: 100%;
  }

  .note-intro-copy h1 {
    max-width: 100%;
  }
}

@media (max-width: 760px) {
  .note-intro-copy h1 {
    font-size: clamp(34px, 11vw, 50px);
  }

  .note-meta span {
    padding: 8px 12px;
  }
}