:root {
  --kw-black: #000000;
  --kw-white: #ffffff;
  --kw-muted: #6b7280;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  min-height: 100vh;
}

.brand-home {
  background: var(--kw-black);
  color: var(--kw-white);
  display: grid;
  place-items: center;
  padding: 24px;
}

.home-shell {
  width: min(760px, 100%);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  padding: clamp(40px, 8vw, 72px) clamp(24px, 6vw, 56px);
  background: rgba(255, 255, 255, 0.03);
}

.brand-logo {
  margin: 0;
  font-size: clamp(2.2rem, 10vw, 4.8rem);
  font-weight: 800;
  letter-spacing: 0.22em;
}

.home-tagline {
  margin: 28px 0 0;
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.9);
}

.home-actions {
  margin-top: 40px;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.home-btn {
  display: inline-block;
  text-decoration: none;
  color: var(--kw-white);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  padding: 12px 24px;
  font-size: 0.92rem;
  font-weight: 600;
}

.home-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.doc-page {
  background: #ffffff;
  color: #000000;
}

.doc-nav {
  border-bottom: 1px solid #e5e7eb;
  background: #ffffff;
}

.doc-nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.doc-logo {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: 0.15em;
  font-weight: 700;
}

.doc-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.doc-links a {
  color: #111827;
  text-decoration: none;
  font-size: 0.9rem;
}

.doc-links a:hover {
  text-decoration: underline;
}

.doc-main {
  max-width: 980px;
  margin: 0 auto;
  padding: 36px 20px 64px;
  line-height: 1.75;
}

.doc-main h1 {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.doc-main h2 {
  margin: 30px 0 10px;
  font-size: 1.15rem;
}

.doc-main p,
.doc-main li {
  font-size: 0.98rem;
  color: #111827;
}

.doc-main ul {
  padding-left: 20px;
}