:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #4b5563;
  --line: #cbd5e1;
  --soft: #f8fafc;
  --band: #eef4f8;
  --accent: #2563eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 7vw;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--ink);
  font-weight: 900;
  overflow-wrap: anywhere;
}

.nav {
  display: flex;
  gap: 14px;
}

.hero {
  padding: 56px 7vw 36px;
  background: var(--band);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  max-width: 880px;
  margin: 0 0 18px;
  font-size: 3.2rem;
  line-height: 1.02;
  overflow-wrap: anywhere;
}

html[lang="zh-Hans"] h1 {
  line-height: 1.12;
}

html[lang="zh-Hans"] h1,
html[lang="zh-Hans"] .lead,
html[lang="zh-Hans"] p,
html[lang="zh-Hans"] li,
html[lang="zh-Hans"] .callout {
  overflow-wrap: anywhere;
  word-break: break-all;
}

.lead {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 1.22rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.wrap {
  display: grid;
  grid-template-columns: minmax(0, 760px) 300px;
  gap: 54px;
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: 54px 0;
}

article {
  min-width: 0;
}

article img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

h2 {
  margin: 34px 0 12px;
  font-size: 1.7rem;
  line-height: 1.2;
}

p,
li {
  color: #253044;
  font-size: 1.03rem;
  line-height: 1.78;
  overflow-wrap: anywhere;
}

ul,
ol {
  padding-left: 22px;
}

.callout,
.sidebar-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.callout {
  margin: 30px 0;
  padding: 20px;
}

.template-block {
  margin: 24px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  overflow: hidden;
}

.template-block h2 {
  margin: 0;
  padding: 16px 18px 0;
  font-size: 1.2rem;
}

.template-block pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  background: var(--soft);
  color: #253044;
  font: 0.92rem/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.sidebar {
  position: sticky;
  top: 18px;
  align-self: start;
}

.sidebar-card {
  padding: 18px;
}

.sidebar-card + .sidebar-card {
  margin-top: 18px;
}

.sidebar-card h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 10px;
  padding: 0 16px;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  font-weight: 900;
}

.secondary-button {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
}

.resource-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.resource-list a {
  display: block;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.footer {
  padding: 26px 7vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  .topbar,
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding: 42px 20px 30px;
  }

  h1 {
    font-size: 2.25rem;
  }

  html[lang="zh-Hans"] h1 {
    font-size: 2rem;
    line-height: 1.18;
  }

  .lead {
    font-size: 1.06rem;
  }

  .wrap {
    grid-template-columns: 1fr;
    gap: 26px;
    width: min(760px, calc(100% - 40px));
    padding: 36px 0;
  }

  .sidebar {
    position: static;
  }
}