.welcome-viewport { position: relative; overflow: hidden; background: #101820; width: 100%; height: 100%; }
.welcome-canvas { position: absolute; left: 50%; top: 50%; width: 1600px; height: 1000px; transform-origin: center; }
.welcome-canvas img { display: block; width: 1600px; height: 1000px; object-fit: contain; }
.welcome-copy { position: absolute; top: 145px; left: 120px; width: 1360px; text-align: center; font-family: "Microsoft YaHei", "Noto Sans SC", sans-serif; letter-spacing: 0; text-shadow: 0 2px 8px #101820; }
.welcome-copy[hidden] { display: none; }
.welcome-title { margin: 0; font-size: 76px; line-height: 1.2; font-weight: 700; white-space: pre-wrap; overflow-wrap: anywhere; }
.welcome-subtitle { margin: 22px 0 0; font-size: 32px; line-height: 1.3; font-weight: 400; overflow-wrap: anywhere; }