:root{--primary:#3370ff;--primary-hover:#2b5fde;--primary-light:#eef3ff;--bg-page:#f7f8fa;--bg-white:#fff;--bg-hover:#f5f6f8;--text-primary:#1d2129;--text-secondary:#4e5969;--text-tertiary:#86909c;--text-disabled:#c9cdd4;--border-light:#e5e6eb;--border:#c9cdd4;--success:#22c55e;--warning:#ff7d00;--error:#ef4444;--brand-from:#3370ff;--brand-to:#1a56db;--hero-from:#0a1633;--hero-to:#13307a;--radius:12px;--radius-lg:16px;--shadow-card:0 4px 20px #102a690f;--shadow-card-hover:0 14px 40px #102a691f;--font:-apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", 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10px;font-size:12px;font-weight:600;line-height:1.5;display:inline-flex}.badge-blue{background:var(--primary-light);color:var(--primary)}.badge-green{color:#16a34a;background:#22c55e1f}.badge-gray{background:var(--bg-hover);color:var(--text-secondary)}.tag{color:var(--primary);background:var(--primary-light);border-radius:4px;padding:3px 10px;font-size:12px;display:inline-block}.topbar{background:linear-gradient(135deg, var(--hero-from), var(--hero-to));color:#dbe6ff;text-align:center;padding:8px 16px;font-size:13px}.topbar a{color:#fff;text-underline-offset:3px;font-weight:600;text-decoration:underline}.nav{z-index:50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-light);background:#ffffffeb;position:sticky;top:0}.nav-inner{align-items:center;gap:24px;max-width:1200px;height:64px;margin:0 auto;padding:0 24px;display:flex}.nav-logo{letter-spacing:-.2px;align-items:center;gap:10px;font-size:20px;font-weight:700;display:inline-flex}.nav-logo .logo-mark{border-radius:8px;flex:none;width:32px;height:32px}.nav-links{align-items:center;gap:4px;margin-left:8px;display:flex}.nav-item{position:relative}.nav-link{color:var(--text-secondary);border-radius:8px;align-items:center;gap:4px;padding:10px 12px;font-size:14.5px;transition:all .15s;display:inline-flex}.nav-link:hover{color:var(--text-primary);background:var(--bg-hover)}.nav-link.active{color:var(--primary);font-weight:600}.nav-link .caret{width:10px;height:10px;transition:transform .18s}.nav-dropdown{background:var(--bg-white);border:1px solid var(--border-light);border-radius:var(--radius);min-width:240px;box-shadow:var(--shadow-card-hover);opacity:0;visibility:hidden;padding:8px;transition:all .18s;position:absolute;top:calc(100% + 10px);left:0;transform:translateY(6px)}.nav-item:hover .nav-dropdown,.nav-item:focus-within 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