/* Page preloader - 站点加载进度页 */
#page-preloader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity .35s ease, visibility .35s ease;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

[data-bs-theme="dark"] #page-preloader {
    background: #0f172a;
}

#page-preloader.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#page-preloader .pp-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 20px;
    text-align: center;
}

#page-preloader .pp-logo {
    max-width: 180px;
    max-height: 72px;
    margin-bottom: 22px;
    object-fit: contain;
}

#page-preloader .pp-title {
    font-size: 20px;
    font-weight: 600;
    color: #111827;
    margin-bottom: 22px;
    letter-spacing: .3px;
}

[data-bs-theme="dark"] #page-preloader .pp-title {
    color: #f3f4f6;
}

#page-preloader .pp-bar-wrapper {
    width: 220px;
    max-width: 60vw;
    height: 4px;
    background: #e5e7eb;
    border-radius: 999px;
    overflow: hidden;
}

[data-bs-theme="dark"] #page-preloader .pp-bar-wrapper {
    background: #334155;
}

#page-preloader .pp-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    border-radius: 999px;
    transition: width .3s ease;
}

#page-preloader .pp-percent {
    font-size: 12px;
    color: #6b7280;
    margin-top: 10px;
    font-variant-numeric: tabular-nums;
    letter-spacing: .5px;
}

[data-bs-theme="dark"] #page-preloader .pp-percent {
    color: #94a3b8;
}

@media (prefers-reduced-motion: reduce) {
    #page-preloader,
    #page-preloader .pp-bar {
        transition: none;
    }
}