/* 空白样式 */

.frosted-navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background: transparent;
    overflow-x: hidden;
}

.bg-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: -1;
    pointer-events: none;
    background: transparent;
}

/* 顶栏下方内容避免被遮挡 */
.main-content {
    margin-top: 60px;
}

#loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: opacity 0.5s ease;
    opacity: 1;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 6px solid #fff;
    border-top: 6px solid #2196f3;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg);}
    100% { transform: rotate(360deg);}
}

.loading-text {
    color: #fff;
    font-size: 1.2rem;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

#loading.hide {
    opacity: 0;
}