:root {
  --yylx-bg: #ffffff;
  --yylx-panel: #ffffff;
  --yylx-sidebar-bg: #fbfcff;
  --yylx-border: #edf0f5;
  --yylx-border-strong: #d9dee8;
  --yylx-text: #171b26;
  --yylx-muted: #5f6675;
  --yylx-faint: #8b93a5;
  --yylx-blue: #235cff;
  --yylx-blue-soft: #eef4ff;
  --yylx-green: #157344;
  --yylx-green-soft: #effcf4;
  --yylx-green-border: #9cf2b9;
  --yylx-warning: #8a5a00;
  --yylx-warning-soft: #fff8e6;
  --yylx-warning-border: #ffe08a;
  --yylx-code-bg: #f7f9fc;
  --yylx-sidebar: 276px;
  --yylx-toc: 226px;
  --yylx-topbar: 72px;
}

html,
body {
  background: var(--yylx-bg);
}

.book {
  color: var(--yylx-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

.yylx-topbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(360px, 660px) minmax(260px, 1fr);
  align-items: center;
  height: var(--yylx-topbar);
  padding: 0 22px;
  border-bottom: 1px solid var(--yylx-border);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(14px);
}

.yylx-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  color: #151922;
  font-size: 28px;
  font-weight: 760;
  letter-spacing: 0;
}

.yylx-brand:hover {
  color: #151922;
  text-decoration: none;
}

.yylx-brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background:
    linear-gradient(135deg, #7fe3ff 0%, #2f6bff 45%, #6d4dff 100%);
  box-shadow: 0 10px 24px rgba(47, 107, 255, 0.22);
  transform: rotate(45deg);
}

.yylx-brand-mark::after {
  position: absolute;
  inset: 8px;
  content: "";
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.88);
}

.yylx-brand-name {
  line-height: 1;
}

.yylx-mobile-menu {
  display: none;
}

.yylx-topbar-search {
  justify-self: center;
  width: 100%;
}

.yylx-topbar #book-search-input {
  position: relative;
  display: flex;
  align-items: center;
  height: 46px;
  margin: 0;
  padding: 0 52px 0 48px;
  border: 1px solid #dde2eb;
  border-radius: 15px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(27, 35, 53, 0.04);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.yylx-topbar #book-search-input:focus-within {
  border-color: #a9bcff;
  box-shadow: 0 0 0 4px rgba(35, 92, 255, 0.08);
}

.yylx-topbar #book-search-input input,
.yylx-topbar #book-search-input input:focus,
.yylx-topbar #book-search-input input:hover {
  width: 100%;
  height: 44px;
  padding: 0;
  color: #1f2430;
  border: 0;
  background: transparent;
  box-shadow: none;
  outline: 0;
  font-size: 16px;
}

.yylx-topbar #book-search-input input::placeholder {
  color: #767d8c;
}

.yylx-search-icon {
  position: absolute;
  left: 20px;
  width: 16px;
  height: 16px;
  border: 2px solid #4b5565;
  border-radius: 50%;
}

.yylx-search-icon::after {
  position: absolute;
  right: -6px;
  bottom: -5px;
  width: 8px;
  height: 2px;
  content: "";
  border-radius: 99px;
  background: #4b5565;
  transform: rotate(45deg);
}

.yylx-search-key {
  position: absolute;
  right: 18px;
  color: #6f7788;
  font-size: 14px;
  font-weight: 650;
}

.yylx-topnav {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 26px;
}

.yylx-topnav a,
.yylx-theme-toggle {
  color: #3d4350;
  border: 0;
  background: transparent;
  font-size: 16px;
  font-weight: 660;
  white-space: nowrap;
}

.yylx-topnav a:hover {
  color: var(--yylx-blue);
  text-decoration: none;
}

.yylx-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  color: #5b6271;
  border-radius: 10px;
  cursor: pointer;
  transition: color 160ms ease, background-color 160ms ease;
}

.yylx-theme-toggle svg {
  width: 18px;
  height: 18px;
}

.yylx-theme-toggle:hover {
  color: var(--yylx-blue);
  background: var(--yylx-blue-soft);
}

.yylx-theme-toggle:focus {
  outline: none;
}

.yylx-theme-toggle:focus-visible {
  box-shadow: 0 0 0 3px rgba(35, 92, 255, 0.18);
}

.book-summary {
  top: var(--yylx-topbar);
  bottom: 0;
  width: var(--yylx-sidebar);
  padding: 34px 20px 40px;
  border-right: 1px solid var(--yylx-border);
  background: var(--yylx-sidebar-bg);
  box-shadow: none;
}

.book.with-summary .book-body {
  left: var(--yylx-sidebar);
}

.book-summary nav {
  max-width: 248px;
}

.book-summary ul.summary {
  padding: 0;
}

.book-summary ul.summary li.header {
  margin: 32px 0 12px;
  padding: 0;
  color: #171b26;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}

.book-summary ul.summary li:first-child + li.header {
  margin-top: 26px;
}

.book-summary ul.summary li a,
.book-summary ul.summary li span {
  margin: 0;
  padding: 7px 0;
  color: #4d5362;
  border-radius: 0;
  background: transparent;
  font-size: 14px;
  line-height: 1.5;
  text-overflow: ellipsis;
}

.book-summary ul.summary li a:hover {
  color: var(--yylx-blue);
  text-decoration: none;
}

.book-summary ul.summary li.active > a {
  color: var(--yylx-blue);
  background: transparent;
  font-weight: 700;
}

.book-summary ul.summary > li:first-child a {
  margin-bottom: 2px;
  padding: 8px 0 12px;
  color: #171b26;
  font-size: 14px;
  font-weight: 600;
}

.book-summary ul.summary li.divider,
.gitbook-link {
  display: none !important;
}

.book-body {
  top: var(--yylx-topbar);
  background: var(--yylx-bg);
}

.book-body .body-inner {
  background: var(--yylx-bg);
}

.book-header {
  position: sticky;
  top: 0;
  z-index: 4;
  height: 0;
  min-height: 0;
  border: 0;
  background: transparent;
}

.book-header h1 {
  display: none;
}

.book-header .btn {
  position: fixed;
  top: 18px;
  left: calc(var(--yylx-sidebar) + 18px);
  z-index: 30;
  display: none;
  height: 38px;
  padding: 0 12px;
  color: #596070;
  border: 1px solid var(--yylx-border);
  border-radius: 10px;
  background: #fff;
  line-height: 38px;
}

.page-wrapper {
  min-height: calc(100vh - var(--yylx-topbar));
}

.page-inner {
  max-width: 1200px;
  margin: 0;
  padding: 58px calc(var(--yylx-toc) + 64px) 96px 72px;
}

.markdown-section {
  max-width: 800px;
  color: var(--yylx-text);
  font-size: 16px;
  line-height: 1.75;
}

.markdown-section > :first-child {
  margin-top: 0 !important;
}

.markdown-section h1 {
  margin: 0 0 8px;
  color: #171b26;
  font-size: 30px;
  line-height: 36px;
  font-weight: 700;
  letter-spacing: 0;
}

.markdown-section h1 + p {
  max-width: 760px;
  margin: 0 0 40px;
  color: #4c5260;
  font-size: 18px;
  line-height: 28px;
}

.markdown-section h2 {
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--yylx-border);
  color: #171b26;
  font-size: 24px;
  line-height: 32px;
  font-weight: 700;
}

.markdown-section h3 {
  margin-top: 34px;
  margin-bottom: 10px;
  color: #242a36;
  font-size: 20px;
  line-height: 28px;
  font-weight: 600;
}

.markdown-section p,
.markdown-section ul,
.markdown-section ol {
  color: #414857;
  margin-top: 1.25em;
  margin-bottom: 1.25em;
}

.markdown-section ol,
.markdown-section ul {
  padding-left: 1.55em;
}

.markdown-section li + li {
  margin-top: 0.5em;
}

.markdown-section a {
  color: var(--yylx-blue);
  font-weight: 600;
  text-decoration: none;
}

.markdown-section a:hover {
  text-decoration: underline;
}

.markdown-section .yylx-callout {
  position: relative;
  margin: 20px 0;
  padding: 16px 20px 16px 52px;
  color: #145b35;
  border: 1px solid var(--yylx-green-border);
  border-radius: 16px;
  background: var(--yylx-green-soft);
  font-size: 14px;
  line-height: 20px;
}

.markdown-section .yylx-callout p,
.markdown-section .yylx-callout ul,
.markdown-section .yylx-callout ol {
  color: inherit;
}

.markdown-section .yylx-callout > :first-of-type {
  margin-top: 0;
}

.markdown-section .yylx-callout > :last-child {
  margin-bottom: 0;
}

.yylx-callout-icon {
  position: absolute;
  top: 18px;
  left: 20px;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.yylx-callout-icon::before {
  position: absolute;
  top: 3px;
  left: 6px;
  width: 2px;
  height: 6px;
  content: "";
  background: currentColor;
}

.yylx-callout-icon::after {
  position: absolute;
  bottom: 2px;
  left: 6px;
  width: 2px;
  height: 2px;
  content: "";
  background: currentColor;
}

.markdown-section .yylx-callout-note,
.markdown-section .yylx-callout-info {
  color: #2147bd;
  border-color: #b8d2ff;
  background: #eff6ff;
}

.markdown-section .yylx-callout-warning {
  color: var(--yylx-warning);
  border-color: var(--yylx-warning-border);
  background: var(--yylx-warning-soft);
}

.markdown-section table {
  display: table;
  width: 100%;
  margin: 22px 0 32px;
  border: 1px solid #e2e7f0;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 14px 36px rgba(32, 41, 58, 0.04);
}

.markdown-section table th,
.markdown-section table td {
  padding: 12px 16px;
  border-color: #e5e9f1;
  font-size: 14px;
  line-height: 20px;
  vertical-align: top;
}

.markdown-section table th {
  color: #242a36;
  background: #f6f8fc;
  font-weight: 600;
}

.markdown-section table tr {
  background: #fff;
}

.markdown-section table tr:nth-child(2n) {
  background: #fbfcff;
}

.markdown-section code {
  padding: 2px 8px;
  color: #14633b;
  border: 1px solid #e6f0eb;
  border-radius: 7px;
  background: #f3faf6;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
  line-height: 1.5;
}

.markdown-section code::before,
.markdown-section code::after {
  content: none;
}

.markdown-section pre {
  position: relative;
  margin: 20px 0 32px;
  padding: 14px 16px;
  border: 1px solid #dfe5ef;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 16px 44px rgba(31, 38, 52, 0.06);
}

.markdown-section pre > code {
  display: block;
  padding: 0;
  color: #1b4d36;
  border: 0;
  background: transparent;
  font-size: 14px;
  line-height: 24px;
}

.yylx-copy-code {
  position: absolute;
  top: 14px;
  right: 14px;
  height: 30px;
  padding: 0 10px;
  color: #6b7280;
  border: 1px solid #d9dee8;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  font-size: 12px;
  font-weight: 700;
}

.yylx-copy-code:hover {
  color: var(--yylx-blue);
  border-color: #b9c7ff;
}

.yylx-page-toc {
  position: fixed;
  top: calc(var(--yylx-topbar) + 58px);
  right: 30px;
  z-index: 3;
  width: var(--yylx-toc);
  max-height: calc(100vh - var(--yylx-topbar) - 90px);
  overflow: auto;
  padding-left: 8px;
  color: #4a5060;
}

.yylx-page-toc-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: #3b404c;
  font-size: 15px;
  line-height: 24px;
  font-weight: 600;
}

.yylx-page-toc-title span {
  width: 16px;
  height: 12px;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}

.yylx-page-toc-title span::after {
  display: block;
  width: 9px;
  height: 2px;
  margin-top: 3px;
  content: "";
  background: currentColor;
}

.yylx-page-toc nav {
  display: grid;
  gap: 10px;
}

.yylx-page-toc a {
  color: #6a7280;
  font-size: 14px;
  line-height: 20px;
  text-decoration: none;
}

.yylx-page-toc a:hover,
.yylx-page-toc a.active {
  color: var(--yylx-blue);
}

.yylx-page-toc .toc-h3 {
  padding-left: 18px;
  color: #7a8290;
}

.navigation {
  display: none;
}

#book-search-results {
  opacity: 1;
}

#book-search-results.open .search-noresults {
  display: none;
}

#book-search-results .search-results {
  padding-top: 12px;
}

#book-search-results .search-results-title {
  color: #3f4653;
  font-size: 20px;
  font-weight: 700;
  text-align: left;
  text-transform: none;
}

#book-search-results .search-results-list {
  padding-left: 0;
  list-style: none;
}

#book-search-results .search-results-item {
  margin: 0 0 18px;
  padding: 18px 20px;
  border: 1px solid var(--yylx-border);
  border-radius: 14px;
  background: #fff;
}

body.with-search .yylx-page-toc {
  display: none;
}

@media (max-width: 1180px) {
  .yylx-topbar {
    grid-template-columns: minmax(190px, 0.8fr) minmax(320px, 560px) minmax(180px, 0.8fr);
  }

  .yylx-topnav {
    gap: 18px;
  }

  .page-inner {
    padding-right: 56px;
  }

  .yylx-page-toc {
    display: none;
  }
}

@media (max-width: 900px) {
  :root {
    --yylx-topbar: 64px;
  }

  .yylx-topbar {
    grid-template-columns: 1fr minmax(180px, 1.4fr);
    gap: 14px;
    padding: 0 14px;
  }

  .yylx-brand-name {
    font-size: 22px;
  }

  .yylx-brand-mark {
    width: 28px;
    height: 28px;
    border-radius: 9px;
  }

  .yylx-topnav {
    display: none;
  }

  .book-summary {
    top: var(--yylx-topbar);
    width: calc(100% - 58px);
    left: -100%;
  }

  .book.with-summary .book-body {
    left: 0;
  }

  .book.with-summary .book-body {
    transform: translate(calc(100% - 58px), 0);
  }

  .book-header .btn {
    display: none;
    top: 13px;
    left: 14px;
  }

  .page-inner {
    padding: 42px 22px 72px;
  }

  .markdown-section {
    max-width: none;
    font-size: 16px;
  }

  .markdown-section h1 {
    font-size: 30px;
    line-height: 36px;
  }

  .markdown-section h1 + p {
    margin-bottom: 38px;
    font-size: 18px;
    line-height: 28px;
  }

  .markdown-section h2 {
    font-size: 24px;
    line-height: 32px;
  }

  .markdown-section table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .markdown-section .yylx-callout {
    padding: 18px 18px 18px 52px;
    border-radius: 14px;
  }
}

html.yylx-dark {
  --yylx-bg: #0f1218;
  --yylx-panel: #161a22;
  --yylx-sidebar-bg: #11151c;
  --yylx-border: #232833;
  --yylx-border-strong: #2e3441;
  --yylx-text: #e6e9f0;
  --yylx-muted: #98a0b0;
  --yylx-faint: #6e7686;
  --yylx-blue: #7c98ff;
  --yylx-blue-soft: #1a2545;
  --yylx-green: #6bd9a3;
  --yylx-green-soft: #112519;
  --yylx-green-border: #2a5a3d;
  --yylx-warning: #f0c050;
  --yylx-warning-soft: #2a2008;
  --yylx-warning-border: #5a4310;
  --yylx-code-bg: #1b202a;
  color-scheme: dark;
}

html.yylx-dark .yylx-topbar {
  background: rgba(15, 18, 24, 0.92);
  border-bottom-color: var(--yylx-border);
}

html.yylx-dark .yylx-brand,
html.yylx-dark .yylx-brand:hover {
  color: var(--yylx-text);
}

html.yylx-dark .yylx-brand-mark::after {
  background: rgba(15, 18, 24, 0.92);
}

html.yylx-dark .yylx-topbar #book-search-input {
  border-color: var(--yylx-border-strong);
  background: var(--yylx-panel);
  box-shadow: none;
}

html.yylx-dark .yylx-topbar #book-search-input:focus-within {
  border-color: var(--yylx-blue);
  box-shadow: 0 0 0 4px rgba(124, 152, 255, 0.12);
}

html.yylx-dark .yylx-topbar #book-search-input input,
html.yylx-dark .yylx-topbar #book-search-input input:focus,
html.yylx-dark .yylx-topbar #book-search-input input:hover {
  color: var(--yylx-text);
}

html.yylx-dark .yylx-topbar #book-search-input input::placeholder {
  color: var(--yylx-faint);
}

html.yylx-dark .yylx-search-icon,
html.yylx-dark .yylx-search-icon::after {
  border-color: var(--yylx-muted);
  background: transparent;
}

html.yylx-dark .yylx-search-icon::after {
  background: var(--yylx-muted);
}

html.yylx-dark .yylx-search-key {
  color: var(--yylx-muted);
}

html.yylx-dark .yylx-topnav a,
html.yylx-dark .yylx-theme-toggle {
  color: var(--yylx-text);
}

html.yylx-dark .yylx-topnav a:hover {
  color: var(--yylx-blue);
}

html.yylx-dark .yylx-theme-toggle {
  color: var(--yylx-muted);
}

html.yylx-dark .yylx-theme-toggle:hover {
  color: var(--yylx-text);
}

html.yylx-dark .book-summary {
  border-right-color: var(--yylx-border);
  background: var(--yylx-sidebar-bg);
}

html.yylx-dark .book-summary ul.summary li.header,
html.yylx-dark .book-summary ul.summary > li:first-child a {
  color: var(--yylx-text);
}

html.yylx-dark .book-summary ul.summary li a,
html.yylx-dark .book-summary ul.summary li span {
  color: var(--yylx-muted);
}

html.yylx-dark .book-summary ul.summary li a:hover,
html.yylx-dark .book-summary ul.summary li.active > a {
  color: var(--yylx-blue);
}

html.yylx-dark .book-header .btn {
  color: var(--yylx-muted);
  border-color: var(--yylx-border);
  background: var(--yylx-panel);
}

html.yylx-dark .markdown-section {
  color: var(--yylx-text);
}

html.yylx-dark .markdown-section h1,
html.yylx-dark .markdown-section h2,
html.yylx-dark .markdown-section h3 {
  color: var(--yylx-text);
}

html.yylx-dark .markdown-section h2 {
  border-bottom-color: var(--yylx-border);
}

html.yylx-dark .markdown-section h1 + p {
  color: var(--yylx-muted);
}

html.yylx-dark .markdown-section p,
html.yylx-dark .markdown-section ul,
html.yylx-dark .markdown-section ol {
  color: var(--yylx-text);
}

html.yylx-dark .markdown-section a {
  color: var(--yylx-blue);
}

html.yylx-dark .markdown-section .yylx-callout {
  color: var(--yylx-green);
  border-color: var(--yylx-green-border);
  background: var(--yylx-green-soft);
}

html.yylx-dark .markdown-section .yylx-callout-note,
html.yylx-dark .markdown-section .yylx-callout-info {
  color: #9ab3ff;
  border-color: #2c3e7a;
  background: #131a2e;
}

html.yylx-dark .markdown-section .yylx-callout-warning {
  color: var(--yylx-warning);
  border-color: var(--yylx-warning-border);
  background: var(--yylx-warning-soft);
}

html.yylx-dark .markdown-section table {
  border-color: var(--yylx-border);
  box-shadow: none;
}

html.yylx-dark .markdown-section table th,
html.yylx-dark .markdown-section table td {
  border-color: var(--yylx-border);
}

html.yylx-dark .markdown-section table th {
  color: var(--yylx-text);
  background: #1b212c;
}

html.yylx-dark .markdown-section table tr {
  background: var(--yylx-panel);
}

html.yylx-dark .markdown-section table tr:nth-child(2n) {
  background: #1a1f28;
}

html.yylx-dark .markdown-section code {
  color: #8de0b0;
  border-color: #1f3a2b;
  background: #142019;
}

html.yylx-dark .markdown-section pre {
  border-color: var(--yylx-border);
  background: var(--yylx-code-bg);
  box-shadow: none;
}

html.yylx-dark .markdown-section pre > code {
  color: #c8e5d4;
  background: transparent;
  border: 0;
}

html.yylx-dark .yylx-copy-code {
  color: var(--yylx-muted);
  border-color: var(--yylx-border-strong);
  background: rgba(22, 26, 34, 0.92);
}

html.yylx-dark .yylx-copy-code:hover {
  color: var(--yylx-blue);
  border-color: var(--yylx-blue);
}

html.yylx-dark .yylx-page-toc,
html.yylx-dark .yylx-page-toc-title {
  color: var(--yylx-text);
}

html.yylx-dark .yylx-page-toc a {
  color: var(--yylx-muted);
}

html.yylx-dark .yylx-page-toc a:hover,
html.yylx-dark .yylx-page-toc a.active {
  color: var(--yylx-blue);
}

html.yylx-dark .yylx-page-toc .toc-h3 {
  color: var(--yylx-faint);
}

html.yylx-dark #book-search-results .search-results-title {
  color: var(--yylx-text);
}

html.yylx-dark #book-search-results .search-results-item {
  border-color: var(--yylx-border);
  background: var(--yylx-panel);
}

html.yylx-dark .yylx-mobile-menu span {
  background: var(--yylx-text);
}

@media (max-width: 640px) {
  .yylx-topbar {
    grid-template-columns: 44px 1fr;
  }

  .yylx-brand {
    width: 44px;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
  }

  .yylx-brand-name {
    display: none;
  }

  .yylx-topbar #book-search-input {
    height: 42px;
    border-radius: 13px;
  }

  .yylx-mobile-menu {
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 40;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 0;
    border-radius: 10px;
    background: transparent;
  }

  .yylx-mobile-menu span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 0 auto;
    border-radius: 999px;
    background: #2f3542;
  }

  .yylx-mobile-menu:focus {
    outline: none;
  }

  .yylx-mobile-menu:focus-visible {
    box-shadow: 0 0 0 3px rgba(35, 92, 255, 0.16);
  }

  .yylx-search-key {
    display: none;
  }

  .markdown-section h1 {
    font-size: 24px;
    line-height: 32px;
  }

  .markdown-section h1 + p {
    font-size: 16px;
    line-height: 26px;
  }
}