* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: #0a0a0f; color: #e8e8f0; line-height: 1.7; }

header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 48px; position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(16px); background: rgba(10,10,15,0.85);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.logo { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; color: #fff; text-decoration: none; }
nav a { color: #aaa; text-decoration: none; margin-left: 32px; font-size: 15px; transition: color .2s; }
nav a:hover { color: #fff; }

.page-hero {
  padding: 72px 48px 48px; max-width: 800px; margin: 0 auto;
  display: flex; align-items: center; gap: 28px;
}
.page-hero-icon { width: 80px; height: 80px; border-radius: 20px; object-fit: cover; flex-shrink: 0; }
.page-hero-icon-placeholder {
  width: 80px; height: 80px; border-radius: 20px; flex-shrink: 0;
  background: linear-gradient(135deg, #818cf8, #c084fc);
  display: flex; align-items: center; justify-content: center;
  font-size: 36px;
}
.page-hero h1 { font-size: 32px; font-weight: 800; }
.page-hero p { color: #888; font-size: 15px; margin-top: 6px; }

.content { max-width: 800px; margin: 0 auto; padding: 0 48px 80px; }
.content h2 { font-size: 20px; font-weight: 700; margin: 40px 0 12px; }
.content h3 { font-size: 16px; font-weight: 600; margin: 28px 0 8px; color: #ccc; }
.content p { color: #999; font-size: 15px; margin-bottom: 12px; }
.content ul { color: #999; font-size: 15px; padding-left: 20px; }
.content ul li { margin-bottom: 8px; }
.content a { color: #818cf8; }

.divider { border: none; border-top: 1px solid rgba(255,255,255,0.06); margin: 0 48px; }

.badge {
  display: inline-block; font-size: 12px; color: #818cf8;
  padding: 3px 10px; border: 1px solid rgba(129,140,248,0.3);
  border-radius: 20px; margin-bottom: 12px;
}

footer {
  text-align: center; padding: 48px 24px; border-top: 1px solid rgba(255,255,255,0.06);
  color: #555; font-size: 14px;
}
footer a { color: #666; text-decoration: none; margin: 0 12px; }
footer a:hover { color: #aaa; }

@media (max-width: 600px) {
  header { padding: 16px 20px; }
  nav a { margin-left: 16px; }
  .page-hero { padding: 48px 20px 32px; flex-direction: column; align-items: flex-start; gap: 16px; }
  .content { padding: 0 20px 60px; }
  .divider { margin: 0 20px; }
}

/* ── Language toggle ── */
html.lang-zh .en { display: none; }
html.lang-en .zh { display: none; }
nav { display: flex; align-items: center; }
.lang-btn {
  background: none; border: 1px solid rgba(255,255,255,0.15); color: #aaa;
  padding: 4px 12px; border-radius: 20px; cursor: pointer; font-size: 13px;
  margin-left: 20px; transition: color .2s, border-color .2s; font-family: inherit;
}
.lang-btn:hover { color: #fff; border-color: rgba(255,255,255,0.4); }