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#1f2d4a1a;transform:translateY(-2px);outline:none}.backend-card[data-v-b39d84cb]:active{transform:translateY(0)}.backend-card-icon[data-v-b39d84cb]{flex:0 0 44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:12px;background:var(--tone-soft);color:var(--tone);font-size:22px;transition:background .18s ease}.backend-card:hover .backend-card-icon[data-v-b39d84cb],.backend-card:focus-visible .backend-card-icon[data-v-b39d84cb]{background:#fff}.backend-card-body[data-v-b39d84cb]{flex:1;min-width:0;display:flex;flex-direction:column;gap:5px}.backend-card-name[data-v-b39d84cb]{font-size:15px;font-weight:600;color:#1f2937}.backend-card-desc[data-v-b39d84cb]{font-size:12px;line-height:1.45;color:#8a93a3}.backend-card-arrow[data-v-b39d84cb]{flex:0 0 auto;font-size:16px;color:#c4cad4;transition:transform .18s ease,color .18s ease}.backend-card:hover .backend-card-arrow[data-v-b39d84cb],.backend-card:focus-visible .backend-card-arrow[data-v-b39d84cb]{color:var(--tone);transform:translate(3px)}.selector-foot[data-v-b39d84cb]{margin:0;font-size:12px;color:#a8abb2;text-align:center}.selector-footer-actions[data-v-b39d84cb]{display:flex;justify-content:center;gap:18px;margin-top:8px}.selector-link[data-v-b39d84cb]{padding:0;border:none;background:none;font:inherit;font-size:12px;color:#409eff;cursor:pointer}.selector-link[data-v-b39d84cb]:hover{color:#2f6be0;text-decoration:underline}.session-state[data-v-b39d84cb]{display:flex;flex-direction:column;align-items:center;text-align:center;padding:24px 0 8px}.session-state h1[data-v-b39d84cb]{margin:18px 0 6px;font-size:20px;font-weight:600;color:#1f2937}.session-state p[data-v-b39d84cb]{margin:0 0 24px;font-size:13px;color:#909399}.session-state-icon[data-v-b39d84cb]{font-size:28px;color:#409eff;padding:22px 0}.session-avatar[data-v-b39d84cb]{width:64px;height:64px;display:flex;align-items:center;justify-content:center;border-radius:20px;font-size:28px;color:#fff;background:linear-gradient(135deg,#4c8dff,#2f6be0);box-shadow:0 8px 20px #2f6be040}.session-enter-btn[data-v-b39d84cb]{width:100%}.session-switch[data-v-b39d84cb]{margin-top:16px;padding:0;border:none;background:none;font:inherit;font-size:13px;color:#909399;cursor:pointer}.session-switch[data-v-b39d84cb]:hover{color:#409eff}@media(max-width:640px){.backend-grid[data-v-b39d84cb]{grid-template-columns:1fr}.backend-card[data-v-b39d84cb]{padding:12px 14px}}