* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; background: #f5f5f5; color: #333; }
.container { max-width: 520px; margin: 40px auto; padding: 30px; background: #fff; border-radius: 12px; box-shadow: 0 2px 12px rgba(0,0,0,.08); }
h1 { text-align: center; font-size: 24px; margin-bottom: 8px; }
.subtitle { text-align: center; color: #999; font-size: 14px; margin-bottom: 24px; }
.tabs { display: flex; gap: 8px; margin-bottom: 24px; }
.tab { flex: 1; padding: 12px; border: 1px solid #e0e0e0; background: #fafafa; border-radius: 8px; cursor: pointer; font-size: 15px; }
.tab.active { background: #e1251b; color: #fff; border-color: #e1251b; }
.panel { display: none; }
.panel.active { display: block; }
.panel p { margin-bottom: 16px; line-height: 1.6; font-size: 14px; }
.panel code { background: #f0f0f0; padding: 2px 6px; border-radius: 4px; font-size: 13px; }
.btn { padding: 12px 24px; border: none; border-radius: 8px; cursor: pointer; font-size: 15px; }
.btn.primary { background: #e1251b; color: #fff; width: 100%; }
.btn.primary:hover { background: #c71e15; }
.btn.small { background: #f0f0f0; color: #666; padding: 8px 16px; font-size: 13px; margin-top: 12px; }
.hidden { display: none !important; }
#qr-area { text-align: center; margin-top: 20px; }
#qr-img { width: 220px; height: 220px; border: 1px solid #eee; border-radius: 8px; }
.status { margin-top: 12px; color: #666; font-size: 14px; }
.status.success { color: #52c41a; }
.status.error { color: #e1251b; }
.form-group { display: flex; gap: 8px; margin-bottom: 12px; }
.form-group input { flex: 1; padding: 12px; border: 1px solid #ddd; border-radius: 8px; font-size: 15px; }
.form-group .btn { width: auto; white-space: nowrap; }
textarea { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 8px; font-size: 14px; font-family: monospace; margin-bottom: 12px; resize: vertical; }
details { margin-top: 16px; font-size: 14px; color: #666; }
details summary { cursor: pointer; margin-bottom: 8px; }
details ol { padding-left: 20px; line-height: 1.8; }
.toast { position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%); background: #333; color: #fff; padding: 12px 24px; border-radius: 8px; font-size: 14px; z-index: 100; }