.app-header{z-index:100;color:#fff;background:linear-gradient(90deg,#1b2533 0%,#232f3e 35% 65%,#1b2533 100%);flex-shrink:0;justify-content:space-between;align-items:center;height:54px;padding:0 24px;display:flex;position:sticky;top:0;box-shadow:inset 0 -1px #ff990059,0 4px 12px #00000059}.app-header .header-left{flex:auto;align-items:center;gap:10px;min-width:0;display:flex}.app-header .header-logo{color:#f90;letter-spacing:.6px;white-space:nowrap;flex-shrink:0;font-size:.85rem;font-weight:700;text-decoration:none;transition:color .15s}.app-header .header-logo:hover{color:#ffb84d}.app-header .header-sep{color:#4a5568;flex-shrink:0;font-size:.9rem}.app-header .header-title{color:#e2e8f0;white-space:nowrap;text-overflow:ellipsis;min-width:0;font-size:.95rem;font-weight:600;overflow:hidden}.app-header .header-subtitle{color:#aab7c4;font-size:.8rem;font-weight:500}@media (max-width:768px){.app-header{height:50px;padding:0 14px}.app-header .header-left{gap:8px}.app-header .header-logo{letter-spacing:.5px;font-size:.78rem}.app-header .header-sep{font-size:.82rem}.app-header .header-title{font-size:.85rem}.app-header .header-subtitle{display:none}}@media (max-width:480px){.app-header{height:46px;padding:0 10px}.app-header .header-logo{font-size:0;line-height:0}.app-header .header-logo:before{content:"ST";letter-spacing:1px;color:#f90;background:#ff99001f;border:1px solid #ff990073;border-radius:5px;padding:3px 7px;font-size:.72rem;font-weight:800;line-height:1;display:inline-block}.app-header .header-sep{display:none}.app-header .header-title{font-size:.82rem}}