.user-guide-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.user-guide-main {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: 48px 0 64px;
  flex: 1;
}

.user-guide-head {
  max-width: 640px;
  margin-bottom: 28px;
}

.user-guide-head h1 {
  margin: 8px 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.user-guide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.user-guide-frame-wrap {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 0 18px 50px rgba(40, 32, 24, 0.06);
}

.user-guide-frame {
  display: block;
  width: 100%;
  height: min(78vh, 980px);
  border: 0;
  background: #f3f1ec;
}

.user-guide-fallback {
  margin: 0;
  padding: 14px 18px 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted, #6b645c);
}

.user-guide-fallback a {
  color: var(--ink);
  font-weight: 650;
}

.user-guide-footer {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto 36px;
}

@media (max-width: 720px) {
  .user-guide-main {
    width: min(100% - 28px, 1100px);
    padding-top: 28px;
  }

  .user-guide-frame {
    height: 70vh;
  }
}