/* 视频背景容器 */
        #video-background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            object-fit: cover;
            background-color: rgba(0, 0, 0);
        }
        
        #loading-mask {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(10, 10, 26, 0.7);
            z-index: 9999;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            transition: opacity 0.5s ease-out;
        }
        
        .video-control {
            position: absolute;
            top: 20px;
            right: 20px;
            z-index: 10000;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            backdrop-filter: blur(5px);
            transition: all 0.3s ease;
        }
        
        .video-control:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: scale(1.1);
        }
        
        .video-icon {
            width: 20px;
            height: 20px;
            fill: white;
        }
        
        .stars {
            position: absolute;
            width: 100%;
            height: 100%;
            z-index: 1;
        }
        
        .star {
            position: absolute;
            width: 2px;
            height: 2px;
            background: white;
            border-radius: 50%;
            animation: twinkle 5s ease-in-out infinite;
        }
        
        .shooting-star {
            position: absolute;
            width: 60px;
            height: 2px;
            background: linear-gradient(90deg, rgba(255,255,255,1), rgba(255,255,255,0));
            transform: rotate(-45deg);
            animation: shooting 5s linear infinite;
            opacity: 0;
        }
        
        @keyframes twinkle {
            0%, 100% {
                opacity: 0.2;
                transform: scale(0.8);
            }
            50% {
                opacity: 1;
                transform: scale(1.2);
            }
        }
        
        @keyframes shooting {
            0% {
                transform: translateX(0) translateY(0) rotate(-45deg);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            100% {
                transform: translateX(500px) translateY(-500px) rotate(-45deg);
                opacity: 0;
            }
        }