.article-navigation {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 0.05rem solid var(--md-default-fg-color--lightest);
}

/* 橫式 District 3510 識別：保留原始比例，避免套用預設正方形 logo 尺寸。 */
.md-header__button.md-logo {
  display: inline-flex;
  align-items: center;
  width: 5.4rem;
  min-width: 5.4rem;
  height: 2.4rem;
  margin: 0 0.35rem;
  padding: 0.15rem 0.25rem;
  overflow: hidden;
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  width: 5rem;
  max-width: none;
  height: auto;
  transform: translateY(-0.1rem);
}

.article-navigation__menus {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.article-navigation__menus a {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.35rem 0.65rem;
  border: 0.05rem solid var(--md-default-fg-color--lightest);
  border-radius: 0.25rem;
  background: var(--md-default-bg-color);
  color: var(--md-typeset-a-color);
  font-size: 0.72rem;
}

.article-navigation__menus a:hover,
.article-navigation__menus a:focus-visible {
  border-color: var(--md-accent-fg-color);
  background: var(--md-accent-fg-color--transparent);
}

.article-navigation__next {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.8rem 1rem;
  border-left: 0.2rem solid var(--md-accent-fg-color);
  border-radius: 0.2rem;
  background: var(--md-code-bg-color);
}

.article-navigation__next span {
  color: var(--md-default-fg-color--light);
  font-size: 0.68rem;
}

.article-navigation__next strong {
  font-size: 0.85rem;
}

/* 高齡使用者與手機優先：放大文字、觸控區，並提高標題辨識度。 */
.md-typeset {
  font-size: 0.85rem;
  line-height: 1.7;
}

.md-typeset table:not([class]) {
  font-size: 0.8rem;
}

.md-typeset h1,
.md-typeset h2 {
  color: var(--md-default-fg-color);
  font-weight: 600;
}

.grid.cards > ul > li {
  position: relative;
}

.grid.cards > ul > li > p:last-child a {
  display: inline-flex;
  align-items: center;
  min-height: 2.4rem;
}

.grid.cards > ul > li > p:last-child a::after {
  position: absolute;
  inset: 0;
  content: "";
}

.grid.cards > ul > li:focus-within {
  outline: 0.15rem solid var(--md-accent-fg-color);
  outline-offset: 0.1rem;
}

.operation-flow {
  max-width: 48rem;
  margin: 1.5rem auto;
  padding: 0;
  list-style: none;
  counter-reset: operation-step;
}

/* 固定頂列下方保留段落定位空間，避免手機從錨點進入時遮住標題。 */
.md-typeset [id] {
  scroll-margin-top: 4.5rem;
}

.operation-flow > li {
  position: relative;
  margin: 0 0 2rem;
  padding: 1rem 1.1rem 1rem 3.4rem;
  border: 0.05rem solid var(--md-default-fg-color--lightest);
  border-radius: 0.4rem;
  background: var(--md-default-bg-color);
  box-shadow: 0 0.12rem 0.35rem rgb(0 0 0 / 7%);
  counter-increment: operation-step;
}

.operation-flow > li::before {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: grid;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  font-weight: 700;
  content: counter(operation-step);
  place-items: center;
}

.operation-flow > li:not(:last-child)::after {
  position: absolute;
  bottom: -1.65rem;
  left: calc(50% - 0.6rem);
  color: var(--md-primary-fg-color);
  font-size: 1.4rem;
  content: "↓";
}

.operation-flow__role,
.data-flow__card > span {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--md-typeset-a-color);
  font-size: 0.75rem;
  font-weight: 700;
}

.operation-flow > li > strong,
.data-flow__card > strong {
  display: block;
  font-size: 0.95rem;
}

.operation-flow > li > p,
.data-flow__card > p {
  margin: 0.45rem 0 0;
}

.operation-flow__exception {
  max-width: 48rem;
  margin: 1.2rem auto 1.8rem;
  padding: 0.8rem 1rem;
  border-left: 0.2rem solid var(--md-accent-fg-color);
  background: var(--md-code-bg-color);
}

.data-flow {
  max-width: 52rem;
  margin: 1.5rem auto;
}

.data-flow__card {
  padding: 1rem 1.1rem;
  border: 0.05rem solid var(--md-default-fg-color--lightest);
  border-radius: 0.4rem;
  background: var(--md-default-bg-color);
  box-shadow: 0 0.12rem 0.35rem rgb(0 0 0 / 7%);
}

.data-flow__arrow {
  padding: 0.35rem;
  color: var(--md-primary-fg-color);
  font-size: 1.4rem;
  text-align: center;
}

.data-flow__branches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

@media screen and (max-width: 44.984375em) {
  .md-typeset {
    font-size: 0.9rem;
    line-height: 1.7;
  }

  .md-typeset h1 {
    margin-bottom: 1.2rem;
    font-size: 1.45rem;
    line-height: 1.35;
  }

  .md-typeset h2 {
    margin-top: 1.8rem;
    font-size: 1.2rem;
    line-height: 1.4;
  }

  .md-typeset h3 {
    font-size: 1rem;
    line-height: 1.5;
  }

  .md-typeset p,
  .md-typeset li {
    line-height: 1.7;
  }

  .md-header__title .md-ellipsis {
    display: none;
  }

  .md-header__button,
  .md-search__icon {
    width: 2.4rem;
    height: 2.4rem;
  }

  .md-header__button.md-logo {
    width: 5.2rem;
    min-width: 5.2rem;
    height: 2.4rem;
    margin: 0 0.2rem;
    padding: 0.15rem 0.1rem;
  }

  .md-header__option {
    display: none;
  }

  .grid.cards > ul {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.6rem;
  }

  .grid.cards > ul > li {
    min-height: 6rem;
    padding: 0.9rem 1rem;
  }

  .grid.cards > ul > li > p:first-child {
    font-size: 1rem;
  }

  .grid.cards > ul > li > p:last-child a {
    min-height: 2.4rem;
    font-size: 0.9rem;
  }

  .md-button {
    display: inline-flex;
    align-items: center;
    min-height: 2.4rem;
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
  }

  .article-navigation__menus {
    gap: 0.5rem;
  }

  .article-navigation__menus a {
    min-height: 2.4rem;
    padding: 0.5rem 0.7rem;
    font-size: 0.85rem;
  }

  .article-navigation__next {
    min-height: 3rem;
    padding: 0.8rem 1rem;
  }

  .article-navigation__next span {
    font-size: 0.8rem;
  }

  .article-navigation__next strong {
    font-size: 0.95rem;
  }

  .operation-flow > li {
    padding: 0.9rem 0.9rem 0.9rem 3.1rem;
  }

  .operation-flow__role,
  .data-flow__card > span {
    font-size: 0.8rem;
  }

  .operation-flow > li > strong,
  .data-flow__card > strong {
    font-size: 0.95rem;
  }

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

  .mobile-card-table-wrap {
    display: block;
    overflow: visible;
    width: 100%;
  }

  .mobile-card-table {
    display: block;
    width: 100%;
    border: 0;
    font-size: 0.8rem;
  }

  .mobile-card-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .mobile-card-table tbody,
  .mobile-card-table tr,
  .mobile-card-table td {
    display: block;
    width: 100%;
  }

  .mobile-card-table tr {
    margin-bottom: 0.8rem;
    overflow: hidden;
    border: 0.05rem solid var(--md-default-fg-color--lightest);
    border-radius: 0.35rem;
    background: var(--md-default-bg-color);
    box-shadow: 0 0.1rem 0.25rem rgb(0 0 0 / 6%);
  }

  .mobile-card-table td {
    display: grid;
    grid-template-columns: minmax(6.5rem, 38%) minmax(0, 1fr);
    gap: 0.65rem;
    padding: 0.65rem 0.75rem;
    border: 0;
    border-bottom: 0.05rem solid var(--md-default-fg-color--lightest);
    line-height: 1.6;
    text-align: left;
    vertical-align: top;
  }

  .mobile-card-table td:last-child {
    border-bottom: 0;
  }

  .mobile-card-table td::before {
    color: var(--md-default-fg-color);
    font-weight: 700;
    content: attr(data-label);
  }

  .mobile-card-table td:first-child {
    background: var(--md-code-bg-color);
    font-weight: 700;
  }
}