body{background:#e5e7eb;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.app-container{background:#f9fafb;flex-direction:column;max-width:430px;height:100vh;margin:0 auto;display:flex;overflow:hidden}.status-bar{background:#fff;border-bottom:1px solid #f3f4f6;justify-content:space-between;align-items:center;height:44px;padding:0 20px;font-size:13px;font-weight:700;display:flex}.screen-content{flex:1;overflow-y:auto}.bottom-nav{background:#fff;border-top:1px solid #f3f4f6;align-items:center;height:70px;display:flex}.nav-item{cursor:pointer;color:#9ca3af;background:0 0;border:none;flex-direction:column;flex:1;align-items:center;font-size:10px;display:flex}.nav-item.active{color:#1a1a2e;font-weight:700}.icon{font-size:20px}