:root {
  color-scheme: light dark;
  --background: #f7f8fa;
  --surface: #ffffff;
  --text: #172033;
  --secondary: #5c6678;
  --muted: #7d8696;
  --line: #dfe3e8;
  --accent: #244c7a;
  --accent-hover: #183b66;
  --notice: #edf4fb;
  --focus: #1670cf;
  --page-padding: clamp(20px, 5vw, 40px);
  --content-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC",
    "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 280px;
  background: var(--background);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 4px;
}

.site-header,
.site-footer {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding-inline: var(--page-padding);
}

.site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: var(--text);
  font-size: 1.02rem;
  font-weight: 680;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 8px;
  background: #162033;
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 760;
  line-height: 1;
}

.header-nav {
  display: flex;
  align-items: center;
}

.header-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: 0.94rem;
  text-decoration: none;
}

.home-main,
.article-main {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  padding-inline: var(--page-padding);
}

.home-main {
  padding-block: clamp(72px, 14vw, 144px) 80px;
}

.hero {
  margin-bottom: clamp(52px, 9vw, 88px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(2.35rem, 7vw, 4.8rem);
  font-weight: 720;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.lede {
  max-width: 42rem;
  margin: 24px 0 0;
  color: var(--secondary);
  font-size: clamp(1.05rem, 2.5vw, 1.24rem);
  line-height: 1.75;
}

.link-list {
  border-top: 1px solid var(--line);
}

.link-list > a {
  display: flex;
  min-height: 96px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 20px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}

.link-list strong,
.link-list small {
  display: block;
}

.link-list strong {
  font-size: 1.08rem;
}

.link-list small {
  margin-top: 4px;
  color: var(--secondary);
  font-size: 0.92rem;
}

.article-main {
  padding-block: clamp(56px, 10vw, 104px) 64px;
}

.article-header {
  margin-bottom: 56px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.article-header h1 {
  max-width: none;
  font-size: clamp(2.25rem, 7vw, 4rem);
}

.updated {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.article-content section + section {
  margin-top: 48px;
}

.article-content h2 {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 4vw, 1.65rem);
  font-weight: 690;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.article-content h3 {
  margin: 28px 0 8px;
  font-size: 1.06rem;
  font-weight: 670;
  line-height: 1.45;
}

.article-content p {
  margin: 0.75em 0;
  color: var(--secondary);
}

.article-content ul {
  margin: 14px 0;
  padding-left: 1.3em;
  color: var(--secondary);
}

.article-content li + li {
  margin-top: 8px;
}

.article-content code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Monaco, monospace;
  font-size: 0.9em;
}

.notice {
  margin-top: 20px !important;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: var(--notice);
  color: var(--text) !important;
}

.site-footer {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.site-footer a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #10141c;
    --surface: #171d27;
    --text: #f2f4f7;
    --secondary: #bdc4cf;
    --muted: #969fad;
    --line: #303846;
    --accent: #9cc9ff;
    --accent-hover: #c5deff;
    --notice: #17283b;
    --focus: #76b7ff;
  }
}

@media (max-width: 560px) {
  .site-header {
    min-height: 68px;
  }

  .home-main {
    padding-top: 64px;
  }

  .site-footer {
    min-height: 112px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    padding-block: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}