:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --paper: #ffffff;
  --panel: #ecece4;
  --panel-strong: #deded2;
  --ink: #1d1f23;
  --muted: #555f69;
  --line: #c8c8ba;
  --link: #174f85;
  --visited: #5f3e86;
  --red: #8b1f1f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 Verdana, Arial, Helvetica, sans-serif;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:visited {
  color: var(--visited);
}

a:hover {
  text-decoration: underline;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 68px;
  padding: 10px clamp(16px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.brand {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 10px;
  color: var(--ink);
}

.brand-title {
  font: 700 22px/1.1 Georgia, "Times New Roman", serif;
}

.topnav {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.topnav a {
  color: var(--link);
  font-size: 14px;
}

.nav-menu {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 0;
}

.nav-menu-panel {
  position: absolute;
  z-index: 20;
  top: 100%;
  left: 0;
  display: none;
  min-width: 190px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 12px 24px rgba(29, 31, 35, 0.12);
}

.nav-menu:hover .nav-menu-panel,
.nav-menu:focus-within .nav-menu-panel {
  display: grid;
}

.nav-menu-panel a {
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
}

.nav-menu-panel a:last-child {
  border-bottom: 0;
}

.language-picker {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
}

.language-picker select {
  min-height: 30px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
}

.overview-page {
  padding: 30px clamp(18px, 5vw, 68px) 72px;
}

.main-column {
  max-width: 920px;
}

.page-title {
  margin: 0 0 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

h1,
h2,
h3 {
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font: 700 clamp(34px, 5vw, 56px)/1.08 Georgia, "Times New Roman", serif;
}

.plain-section {
  margin: 0 0 30px;
}

.plain-section h2 {
  margin: 0 0 10px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  font: 700 21px/1.2 Georgia, "Times New Roman", serif;
}

.plain-section p {
  margin: 0 0 12px;
}

.plain-section ul {
  margin: 0;
  padding-left: 24px;
}

.plain-section li {
  margin: 4px 0;
}

code {
  padding: 1px 4px;
  background: var(--panel);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.link-list {
  margin: 0;
}

.link-list div {
  padding: 10px 0 11px;
  border-bottom: 1px solid var(--line);
}

.link-list dt {
  margin: 0 0 4px;
  font-weight: 700;
}

.link-list dd {
  margin: 0;
  color: var(--muted);
}

.page-shell {
  max-width: 980px;
  padding: 34px clamp(18px, 5vw, 68px) 72px;
}

.release-page {
  display: grid;
  gap: 14px;
  max-width: 820px;
  padding: 34px clamp(18px, 5vw, 68px) 72px;
}

.release-card {
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 6px 14px rgba(29, 31, 35, 0.05);
}

.release-card h1 {
  margin: 0 0 8px;
  font-size: 24px;
}

.release-card a {
  overflow-wrap: anywhere;
  font-size: 13px;
  font-weight: 700;
}

.release-label {
  margin: 0 0 6px;
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

[data-lang],
.language-panel {
  display: none;
}

body[data-selected-language="en"] [data-lang="en"],
body[data-selected-language="en"] .language-panel[data-language-panel="en"],
body[data-selected-language="zh-SC"] [data-lang="zh-SC"],
body[data-selected-language="zh-SC"] .language-panel[data-language-panel="zh-SC"],
body[data-selected-language="zh-TC"] [data-lang="zh-TC"],
body[data-selected-language="zh-TC"] .language-panel[data-language-panel="zh-TC"] {
  display: block;
}

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

  .topnav {
    width: 100%;
  }

  .overview-page {
    padding: 22px 18px 52px;
  }

  .release-page {
    padding: 22px 18px 52px;
  }
}