/* V3.2 统一顶部导航：自包含样式，不依赖也不覆盖各页面原有样式 */
.nv-top{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  padding:10px 16px;background:#0f1720;border-bottom:1px solid #1f2b38;position:sticky;top:0;z-index:30;
  font:14px/1.5 "Segoe UI","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:#e6edf5}
.nv-brand{display:flex;align-items:center;gap:9px;font-weight:600;font-size:16px;letter-spacing:.3px}
.nv-brand .nv-dot{width:9px;height:9px;border-radius:50%;background:#4ea1ff;box-shadow:0 0 8px #4ea1ff}
.nv-brand small{font-weight:400;font-size:12px;color:#8ea0b5}
.nv-links{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.nv-links a,.nv-more>summary{padding:6px 13px;border-radius:999px;color:#cbd8e6;text-decoration:none;
  border:1px solid transparent;cursor:pointer;list-style:none;white-space:nowrap}
.nv-links a:hover,.nv-more>summary:hover{background:#182433;border-color:#243546;color:#eaf2fb}
.nv-links a.nv-active{background:rgba(78,161,255,.15);border-color:#2d6cae;color:#bcd9ff;font-weight:600}
.nv-links a.nv-primary{background:#2f6db8;border-color:#2f6db8;color:#eaf4ff;font-weight:600}
.nv-links a.nv-primary:hover{background:#3b7fd0;border-color:#3b7fd0}
.nv-more{position:relative}
.nv-more>summary::-webkit-details-marker{display:none}
.nv-more[open]>summary{background:#182433;border-color:#243546}
.nv-menu{position:absolute;right:0;top:calc(100% + 6px);min-width:210px;background:#121a24;
  border:1px solid #1f2b38;border-radius:10px;padding:6px;box-shadow:0 10px 30px rgba(0,0,0,.5);z-index:40}
.nv-menu a{display:block;padding:8px 12px;border-radius:8px;color:#cbd8e6;text-decoration:none;font-size:13.5px}
.nv-menu a:hover{background:#182433;color:#eaf2fb}
.nv-menu .nv-sep{height:1px;background:#1f2b38;margin:6px 4px}
.nv-menu .nv-label{padding:6px 12px 2px;font-size:11.5px;color:#7d8ea3}
@media (max-width:640px){
  .nv-top{padding:9px 12px;gap:8px}
  .nv-brand{font-size:15px}
  .nv-links{gap:4px;width:100%;justify-content:flex-start}
  .nv-links a,.nv-more>summary{padding:7px 11px;font-size:13px}
  .nv-menu{left:auto;right:0;min-width:180px;max-width:calc(100vw - 24px)}
}

/* 子工具条（旧页面保留自己的次要操作，不挤占主导航） */
.nv-sub{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:8px 16px;
  background:#0d151e;border-bottom:1px solid #1f2b38}
.nv-sub-btn{background:#1d2b3a;color:#e6edf5;border:1px solid #1f2b38;border-radius:8px;
  padding:6px 13px;font-size:13px;cursor:pointer}
.nv-sub-btn:hover{border-color:#4ea1ff}
.nv-sub-hint{color:#8ea0b5;font-size:12.5px}