* { box-sizing: border-box; }

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  background: var(--color-bg);
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }
button { color: inherit; font: inherit; }
h1, h2, h3, p, figure { margin: 0; }
.display-line { display: block; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: var(--layer-overlay);
  padding: 10px 14px;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--layer-header);
  min-height: var(--header-height);
  padding-inline: var(--page-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  border-bottom: 1px solid transparent;
  transition: background-color .3s ease, border-color .3s ease;
}

.site-header.is-scrolled { border-color: var(--color-line); background: rgba(12,13,14,.88); backdrop-filter: blur(18px); }

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
}

.brand img {
  display: block;
  width: 190px;
  max-width: 190px;
  height: auto;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(22px, 3vw, 44px);
  color: var(--color-muted);
  font-size: 13px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: clamp(24px, 3vw, 44px);
}

.site-header nav a {
  position: relative;
  padding-bottom: 8px;
  opacity: .58;
  transition: color .2s ease, opacity .2s ease;
}

.site-header nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.site-header nav a:hover,
.site-header nav a[aria-current="page"] {
  color: var(--color-text);
  opacity: 1;
}

.site-header nav a[aria-current="page"]::after { transform: scaleX(1); }

.menu-toggle { display: none; }

.language-switcher {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 12px;
  border: 1px solid rgba(243, 240, 233, .28);
  border-radius: 999px;
  color: var(--color-muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  white-space: nowrap;
}

.language-switcher button {
  position: relative;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
}

.language-switcher button[aria-pressed="true"] { color: var(--color-text); }
.language-switcher-desktop { height: 32px; padding-inline: 16px; }
.language-switcher-desktop button { min-height: 30px; }
.language-switcher-mobile { display: none; }

html[lang="zh-Hant"] h1,
html[lang="zh-Hant"] h2,
html[lang="zh-Hant"] h3 { letter-spacing: 0; }

html[lang="zh-Hant"] body {
  font-family: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.75;
  line-break: strict;
  word-break: normal;
}

html[lang="zh-Hant"] p,
html[lang="zh-Hant"] h1,
html[lang="zh-Hant"] h2,
html[lang="zh-Hant"] h3,
html[lang="zh-Hant"] a,
html[lang="zh-Hant"] button { text-wrap: pretty; }

html[lang="zh-Hant"] .display-line {
  white-space: nowrap;
  word-break: keep-all;
  overflow-wrap: normal;
}

html[lang="zh-Hant"] .section-kicker,
html[lang="zh-Hant"] .hero-kicker { letter-spacing: .08em; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}