* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; margin: 0; background: #f8f8f8; color: #222; font-size: 15px; min-height: 100vh; }
.layout { display: flex; min-height: 100vh; }
.topbar { position: fixed; top: 0; left: 0; right: 0; height: 52px; background: #fff; border-bottom: 1px solid #e5e5e5; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; z-index: 100; }
.topbar .logo { font-weight: 600; font-size: 1.1rem; color: #222; text-decoration: none; }
.topbar .lang { font-size: 0.85rem; color: #666; }
.topbar .lang a { color: #666; text-decoration: none; margin-left: 8px; }
.topbar .lang a:hover { color: #222; }
.sidebar { width: 200px; padding-top: 60px; background: #fff; border-right: 1px solid #e5e5e5; flex-shrink: 0; }
.sidebar nav { padding: 16px 0; }
.sidebar .menu-label { font-size: 0.75rem; color: #999; text-transform: uppercase; letter-spacing: 0.05em; padding: 0 20px 8px; }
.sidebar a { display: block; padding: 8px 20px; color: #444; text-decoration: none; font-size: 0.9rem; }
.sidebar a:hover { background: #f5f5f5; color: #222; }
.sidebar a.active { background: #f0f0f0; color: #222; font-weight: 500; }
.main { flex: 1; padding: 60px 24px 24px; max-width: 640px; }
.main h1 { font-size: 1.25rem; font-weight: 600; margin: 0 0 20px; }
.main h2 { font-size: 1rem; font-weight: 600; margin: 20px 0 8px; }
.main p { margin: 0 0 12px; line-height: 1.5; color: #444; }
.field { margin-bottom: 16px; }
.field label { display: block; margin-bottom: 6px; color: #555; font-size: 0.875rem; }
.field input { width: 100%; max-width: 400px; padding: 10px 12px; border: 1px solid #e0e0e0; border-radius: 6px; font-size: 15px; background: #fff; }
.field input:focus { outline: none; border-color: #999; }
.tabs { display: flex; gap: 0; margin-bottom: 20px; border-bottom: 1px solid #e0e0e0; }
.tab { padding: 10px 16px; cursor: pointer; color: #666; font-size: 0.9rem; border: none; background: none; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab:hover { color: #222; }
.tab.active { color: #222; font-weight: 500; border-bottom-color: #222; }
.panel { display: none; }
.panel.active { display: block; }
.divider { height: 1px; background: #e8e8e8; margin: 20px 0; }
.btn { padding: 10px 20px; font-size: 15px; border: none; border-radius: 6px; cursor: pointer; background: #222; color: #fff; margin-top: 8px; }
.btn:hover { background: #333; }
.msg { margin-top: 16px; padding: 10px 12px; border-radius: 6px; font-size: 0.875rem; }
.msg.ok { background: #e8f5e9; color: #1b5e20; }
.msg.err { background: #ffebee; color: #c62828; }
.faq-item { margin-bottom: 16px; border-bottom: 1px solid #eee; padding-bottom: 16px; }
.faq-item h3 { font-size: 0.95rem; font-weight: 600; margin: 0 0 6px; }
.faq-item p { margin: 0; font-size: 0.9rem; }