* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}
body {
  margin: 0;
  background: #fbfdff;
  color: #142d47;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.8;
}
a {
  color: #145adc;
  text-underline-offset: 4px;
}
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #7ca5ff;
  outline-offset: 4px;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  line-height: 1.4;
  text-wrap: balance;
}
section {
  scroll-margin-top: 100px;
}
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 10;
  padding: 8px 16px;
  background: white;
}
.skip-link:focus {
  top: 8px;
}
.reading-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px max(24px, calc((100vw - 1200px) / 2));
  background: #fbfdfff5;
  border-bottom: 1px solid #dce5ef;
}
.reading-brand {
  display: flex;
  gap: 10px;
  align-items: center;
  color: #142d47;
  font-size: 25px;
  font-weight: 650;
  letter-spacing: -1px;
  text-decoration: none;
}
.reading-header nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
}
.reading-header nav a {
  text-decoration: none;
}
.reading-container,
.reading-footer {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}
.breadcrumb {
  font-size: 12px;
  margin-top: 24px;
  color: #546d84;
}
.breadcrumb ol {
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}
.breadcrumb li + li::before {
  content: '/';
  margin-right: 8px;
}
.reading-hero {
  padding-block: 64px 48px;
  max-width: 960px;
}
.eyebrow {
  color: #1961ee;
  font-size: 12px;
  letter-spacing: 0.16em;
}
.reading-hero h1 {
  font-size: clamp(32px, 4.2vw, 54px);
  letter-spacing: -0.035em;
  margin-top: 20px;
}
.reading-description {
  margin-top: 24px;
  max-width: 800px;
  font-size: 18px;
  color: #4b657f;
}
.reading-date {
  margin-top: 22px;
  font-size: 12px;
  color: #546d84;
}
.reading-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}
.reading-toc {
  position: sticky;
  top: 108px;
  font-size: 13px;
  padding-left: 20px;
  border-left: 2px solid #dce5ef;
}
.reading-toc p {
  color: #142d47;
  font-weight: 600;
  margin-bottom: 16px;
}
.reading-toc a {
  display: block;
  margin-block: 12px;
  color: #4b657f;
  text-decoration: none;
}
.reading-toc a:hover {
  color: #145adc;
}
.reading-body > section {
  margin-bottom: 48px;
}
.reading-body h2,
.reading-related > h2 {
  font-size: 26px;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}
.reading-body p,
.reading-body li {
  font-size: 16px;
}
.reading-body ul {
  padding-left: 22px;
  margin-block: 24px 0;
}
.reading-body li {
  margin-bottom: 12px;
  padding-left: 4px;
}
.reading-summary {
  padding: 30px;
  border-left: 3px solid #1961ee;
  background: #edf5ff;
}
.reading-summary h2 {
  font-size: 19px;
}
.table-scroll {
  margin-top: 24px;
  overflow: auto;
  border: 1px solid #dce5ef;
  border-radius: 6px;
}
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 540px;
  text-align: left;
  font-size: 14px;
}
th,
td {
  padding: 18px;
  vertical-align: top;
  border-bottom: 1px solid #dce5ef;
}
thead {
  background: #eaf2fd;
}
tbody th {
  width: 24%;
  font-weight: 600;
}
tbody tr:last-child > * {
  border-bottom: 0;
}
.reading-scope {
  padding-top: 24px;
  border-top: 1px solid #dce5ef;
  color: #4b657f;
}
.reading-scope h2 {
  font-size: 18px;
}
.reading-scope p {
  font-size: 13px;
  margin-top: 16px;
}
.reading-related {
  padding-block: 32px 40px;
}
.reading-related > div {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.reading-related a {
  display: block;
  border: 1px solid #dce5ef;
  padding: 24px;
  color: #142d47;
  text-decoration: none;
}
.reading-related a:hover {
  border-color: #1961ee;
}
.reading-related h3 {
  font-size: 18px;
  margin-bottom: 14px;
}
.reading-related p {
  color: #4b657f;
  font-size: 13px;
}
.reading-cta {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 30px;
  background: #1961ee;
  color: #fff;
  text-decoration: none;
  margin-bottom: 60px;
}
.reading-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-block: 30px;
  border-top: 1px solid #dce5ef;
  font-size: 12px;
  color: #546d84;
}
@media (max-width: 900px) {
  .reading-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }
  .reading-toc {
    position: static;
  }
  .reading-related > div {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 560px) {
  .reading-header {
    padding: 14px 20px;
    gap: 12px;
  }
  .reading-brand {
    font-size: 22px;
  }
  .reading-brand img {
    width: 26px;
    height: 26px;
  }
  .reading-header nav {
    font-size: 12px;
    gap: 16px;
  }
  .reading-container,
  .reading-footer {
    width: calc(100% - 40px);
  }
  .reading-hero {
    padding-block: 40px 32px;
  }
  .reading-description {
    font-size: 16px;
  }
  .reading-body h2 {
    font-size: 23px;
  }
  .reading-summary {
    padding: 22px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
.reading-toc-mobile,
.reading-title-break {
  display: none;
}
@media (max-width: 560px) {
  html {
    scroll-padding-top: 80px;
  }
  section {
    scroll-margin-top: 0;
  }
  .reading-header {
    padding: 10px 20px;
    min-height: 64px;
  }
  .reading-header nav {
    gap: 12px;
  }
  .reading-header nav a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }
  .breadcrumb {
    margin-top: 18px;
  }
  .breadcrumb ol {
    display: block;
  }
  .breadcrumb li {
    display: inline;
    line-height: 1.7;
  }
  .breadcrumb li + li::before {
    margin-left: 8px;
  }
  .reading-hero {
    padding-block: 28px 24px;
  }
  .eyebrow {
    font-size: 10px;
    letter-spacing: 0.12em;
  }
  .reading-hero h1 {
    font-size: clamp(26px, 7.2vw, 30px);
    line-height: 1.4;
    margin-top: 14px;
    text-wrap: pretty;
  }
  .reading-title-break {
    display: initial;
  }
  .reading-description {
    margin-top: 16px;
    font-size: 15px;
    line-height: 1.8;
  }
  .reading-date {
    margin-top: 16px;
  }
  .reading-layout {
    gap: 20px;
  }
  .reading-toc {
    padding: 0;
    border: 1px solid #dce5ef;
    border-radius: 6px;
  }
  .reading-toc-desktop {
    display: none;
  }
  .reading-toc-mobile {
    display: block;
  }
  .reading-toc-mobile summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    list-style: none;
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 600;
  }
  .reading-toc-mobile summary::-webkit-details-marker {
    display: none;
  }
  .reading-toc-mobile summary::after {
    content: '+';
    font-size: 20px;
    color: #1961ee;
    line-height: 1;
  }
  .reading-toc-mobile[open] summary::after {
    content: '−';
  }
  .reading-toc-mobile summary:focus-visible {
    outline: 3px solid #7ca5ff;
    outline-offset: 3px;
  }
  .reading-toc-mobile nav {
    padding: 0 16px 12px;
  }
  .reading-toc-mobile a {
    display: flex;
    align-items: center;
    min-height: 44px;
    margin: 0;
    padding-block: 8px;
    border-top: 1px solid #e4ebf3;
  }
  .reading-body > section {
    margin-bottom: 32px;
  }
  .reading-body h2,
  .reading-related > h2 {
    font-size: 22px;
    line-height: 1.45;
    margin-bottom: 14px;
    text-wrap: pretty;
  }
  .reading-body p,
  .reading-body li {
    font-size: 15px;
    line-height: 1.9;
  }
  .reading-body ul {
    margin-top: 16px;
  }
  .reading-summary {
    padding: 20px 18px;
  }
  .reading-summary h2,
  .reading-scope h2 {
    font-size: 18px;
  }
  .table-scroll {
    margin-top: 18px;
    overscroll-behavior-x: contain;
  }
  th,
  td {
    padding: 14px;
  }
  .reading-scope p {
    font-size: 13px;
  }
  .reading-related {
    padding-block: 12px 24px;
  }
  .reading-related > div {
    gap: 0;
    border-top: 1px solid #dce5ef;
  }
  .reading-related a {
    padding: 20px 0;
    border: 0;
    border-bottom: 1px solid #dce5ef;
  }
  .reading-related h3 {
    margin-bottom: 8px;
  }
  .reading-related p {
    font-size: 14px;
  }
  .reading-cta {
    padding: 18px 20px;
    margin-bottom: 32px;
    font-size: 15px;
  }
  .reading-footer {
    align-items: center;
    padding-block: 20px;
  }
}