:root {
  color-scheme: light;
  --paper: #fff;
  --ink: #13324c;
  --muted: #6c8396;
  --accent: #ef781f;
  --line: #d8e1e8;
  --font: "Noto Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}
html[lang="en"] { --font: "Segoe UI", Arial, "Microsoft YaHei", sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 18px/1.8 var(--font); }
a { color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid var(--ink); outline-offset: 5px; border-radius: 3px; }
h1, h2, p { margin: 0; }
.container { width: calc(100% - 48px); max-width: 960px; margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 24px; padding: 8px 20px; background: var(--ink); color: #fff; }
.skip-link:focus { top: 12px; }
.site-header { min-height: 116px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 8px; }
.brand img { width: 72px; height: 72px; object-fit: contain; }
.wordmark { font-size: 24px; line-height: 1.3; font-weight: 750; letter-spacing: .035em; }
.wordmark > span { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; font-weight: 500; letter-spacing: .02em; }
.language-link { padding: 12px 0 12px 24px; border-left: 1px solid var(--line); font-size: 16px; line-height: 1.5; font-weight: 600; }
.language-link:hover { color: #d65f10; }
.version-info { max-width: 740px; padding: 64px 0 96px; }
h1 { font-size: clamp(34px, 4vw, 52px); line-height: 1.22; letter-spacing: -.035em; font-weight: 750; }
.version-status { margin-top: 42px; padding-left: 24px; border-left: 3px solid var(--accent); }
h2 { font-size: 28px; line-height: 1.4; font-weight: 650; letter-spacing: -.02em; }
.version-status p { color: var(--muted); margin-top: 16px; max-width: 640px; font-size: 18px; line-height: 1.85; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 42px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 14px; min-height: 58px; padding: 13px 24px; border: 1.5px solid var(--ink); border-radius: 8px; font-size: 17px; line-height: 1.5; font-weight: 650; }
.button-primary { background: var(--ink); color: #fff; }
.button-primary:hover { background: #204762; }
.button-outline:hover { background: #f2f6f9; }
.button svg { width: 22px; height: 22px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.site-footer { border-top: 1px solid var(--line); padding-block: 28px 36px; color: var(--muted); font-size: 16px; line-height: 1.7; overflow-wrap: break-word; }
@media (max-width: 600px) {
  .site-header { min-height: 96px; gap: 12px; }
  .brand img { width: 56px; height: 56px; }
  .wordmark { font-size: 20px; }
  .wordmark > span { font-size: 11px; }
  .language-link { font-size: 14px; padding-left: 12px; }
  .version-info { padding: 42px 0 60px; }
  h1 { font-size: 34px; }
  .version-status { margin-top: 32px; padding-left: 18px; }
  h2 { font-size: 25px; }
  .version-status p { font-size: 17px; }
  .actions { align-items: stretch; flex-direction: column; gap: 14px; margin-top: 32px; }
  .button { min-height: 54px; font-size: 16px; padding-inline: 16px; }
}