:root {
  --primary: #1b4b8a;
  --accent: #c8102e;
  --bg: #f5f0e8;
  --text: #1a1f2e;
  --muted: #6b7280;
  --border: #e4ded4;
  --font-body: "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body.doc {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.doc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid var(--border);
  background: rgba(245, 240, 232, 0.94);
  position: sticky;
  top: 0;
  z-index: 10;
}

.doc-top__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.doc-top__brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.doc-top__nav {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.doc-top__nav > a {
  color: var(--primary);
  font-weight: 500;
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: #fff;
}

.lang-switch button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}

.lang-switch button[aria-pressed="true"] {
  background: var(--primary);
  color: #fff;
}

.doc-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 4vw, 1.5rem) 3.5rem;
}

.doc-main h1 {
  margin: 0 0 0.35em;
  color: var(--primary);
  font-size: 1.7rem;
}

.doc-main h2 {
  margin: 1.6em 0 0.45em;
  font-size: 1.08rem;
  color: var(--text);
}

.doc-main p,
.doc-main li {
  color: var(--muted);
  margin: 0.4em 0;
}

.doc-main .meta {
  margin-bottom: 1.3em;
  font-size: 0.92rem;
}

.doc-main ul { padding-left: 1.2rem; }
.doc-main strong { color: var(--text); }
.doc-main code {
  font-size: 0.92em;
  background: rgba(27, 75, 138, 0.08);
  padding: 0.05em 0.35em;
  border-radius: 4px;
}

.hero {
  margin: 1.2rem 0 2rem;
  padding: 1.4rem 1.2rem;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--border);
}

.hero p { color: var(--text); margin: 0.35em 0; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.cta {
  display: inline-block;
  padding: 0.65rem 1.1rem;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none !important;
}

.cta-primary {
  background: var(--primary);
  color: #fff !important;
}

.cta-secondary {
  background: #fff;
  color: var(--primary) !important;
  border: 1px solid rgba(27, 75, 138, 0.35);
}

.doc-main.home {
  max-width: 960px;
}

.moodboard {
  margin: 0.5rem 0 2rem;
}

.moodboard h2 {
  margin: 0 0 0.35em;
  font-size: 1.15rem;
  color: var(--primary);
}

.moodboard__lead {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.moodboard__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.moodboard__item {
  margin: 0;
}

.moodboard__item--wide {
  grid-column: 1 / -1;
}

.moodboard__item img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
}

.moodboard__item figcaption {
  margin-top: 0.45rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.home-contact {
  margin-top: 0.5rem;
}

@media (max-width: 640px) {
  .moodboard__grid {
    grid-template-columns: 1fr;
  }

  .moodboard__item--wide {
    grid-column: auto;
  }
}

/* Bilingual blocks */
html[lang="zh-CN"] [data-lang="en"],
html[lang="en"] [data-lang="zh"] {
  display: none !important;
}

html:not([lang]) [data-lang="en"] {
  display: none !important;
}