:root { --primary-color: #1abc9c; --bg-gradient: linear-gradient(140deg, #e0f5e9 0%, #c6f0e0 35%, #a3e4d7 100%); }
body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; font-family: 'Noto Sans SC', sans-serif; overflow: hidden; }
.background-stage { position: fixed; inset: 0; z-index: -1; }
.background-stage__layer { width: 100%; height: 100%; transition: background 1s ease; }
.glass-panel { background: rgba(255, 255, 255, 0.4); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.4); }
.custom-scroll::-webkit-scrollbar { width: 4px; }
.custom-scroll::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.05); border-radius: 10px; }