.fl-loading-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    background: linear-gradient(135deg, var(--surface-color) 0%, color-mix(in srgb, var(--surface-color) 90%, black) 100%);
    backdrop-filter: blur(10px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    visibility: visible;
}

.fl-loading-overlay.fl-loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(1.1);
}

.fl-loading-inner {
    text-align: center;
    max-width: 90%;
    padding: 40px 30px;
    background: color-mix(in srgb, var(--surface-color) 95%, white);
    border-radius: 24px;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(20px);
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fl-spinner {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 3px solid color-mix(in srgb, var(--border-color) 30%, transparent);
    border-top: 3px solid var(--theme-primary-color);
    border-right: 3px solid color-mix(in srgb, var(--theme-primary-color) 70%, transparent);
    animation: fl-spin 1.2s cubic-bezier(0.68, -0.55, 0.27, 1.55) infinite;
    margin: 0 auto 20px;
    position: relative;
}

.fl-spinner::after {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top: 3px solid color-mix(in srgb, var(--theme-primary-color) 40%, transparent);
    animation: fl-spin 2s linear infinite;
}

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

.fl-loading-inner h2 {
    letter-spacing: 2px;
    margin: 0 0 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary-color);
    background: linear-gradient(135deg, var(--theme-primary-color), color-mix(in srgb, var(--theme-primary-color) 70%, #4facfe));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.fl-loading-inner p {
    margin: 0 0 15px;
    color: var(--text-secondary-color);
    font-size: 14px;
    line-height: 1.5;
    opacity: 0.8;
}

.fl-loading-gif {
    max-width: 120px;
    display: block;
    margin: 15px auto 0;
    border-radius: 12px;
    opacity: 0.9;
}

.fl-loading-progress {
    width: 100%;
    height: 3px;
    background: color-mix(in srgb, var(--border-color) 20%, transparent);
    border-radius: 2px;
    overflow: hidden;
    margin: 20px 0 0;
}

.fl-loading-progress::before {
    content: '';
    display: block;
    height: 100%;
    width: 30%;
    background: linear-gradient(90deg, var(--theme-primary-color), color-mix(in srgb, var(--theme-primary-color) 70%, #4facfe));
    border-radius: 2px;
    animation: loadingProgress 2s ease-in-out infinite;
}

@keyframes loadingProgress {
    0%, 100% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(350%);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .fl-loading-inner {
        padding: 30px 20px;
        border-radius: 20px;
        max-width: 85%;
    }
    
    .fl-spinner {
        width: 56px;
        height: 56px;
    }
    
    .fl-loading-inner h2 {
        font-size: 16px;
    }
    
    .fl-loading-inner p {
        font-size: 13px;
    }
}