#preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    overflow: hidden; 
}

.preloader-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity .3s ease;
}

#preloader:not(.loaded) {
    pointer-events: auto;
}

#preloader.loaded {
    pointer-events: none;
}

.curtain {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    background-color: var(--theme-main);
    transition: transform 1s cubic-bezier(0.77, 0, 0.175, 1), opacity .1s ease;
    will-change: transform;
    z-index: -1;
}

.curtain-left  { left: 0;  }
.curtain-right { right: 0; }

/* 加载完成：内容淡出 + 幕布左右拉开 */
#preloader.loaded .loading-spinner,
#preloader.loaded .loading-text,
#preloader.loaded .loading-author {
    opacity: 0;
    transition: opacity .1s ease;
}

#preloader.loaded .curtain-left {
    transform: translateX(-100%);
    opacity: 0.9;
}

#preloader.loaded .curtain-right {
    transform: translateX(100%);
    opacity: 0.9;
}

.loading-spinner {
    position: relative;
    width: 100px;
    height: 100px;
    border: 4px double var(--tertiary);
    border-top: 4px dotted var(--secondary);
    border-radius: 50%;
    animation: spin 2.5s ease-in-out infinite;;
    display: flex;
    justify-content: center;
    align-items: center;
}

.spinner-image {
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    animation: anti-spin 2.5s ease-in-out infinite;
    background: var(--theme-main); 
}

.loading-text {
    margin-top: 20px;
    color: var(--font-color);
    font-size: 16px;
    letter-spacing: 5px;
    font-weight: bold;
}

.loading-author {
    margin-top: 5px;
    letter-spacing: 5px;
    font-family: -apple-system,BlinkMacSystemFont,segoe ui;
    font-weight: bold;
}

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

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

html.preloading {
    overflow: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

html.preloading body {
    overflow: hidden;
}

html.preloading::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}