/* Enhanced Professional Preloader Styles */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf9 100%);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
    visibility: visible;
    opacity: 1;
}

.preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
    position: relative;
}

.preloader-logo {
    font-family: 'Montserrat', Arial, sans-serif;
    font-size: 2.8rem;
    font-weight: 800;
    color: #003366; /* Corporate dark blue */
    margin-bottom: 15px;
    animation: pulse 2s infinite ease-in-out;
    text-shadow: 0 2px 10px rgba(0, 51, 102, 0.1);
    letter-spacing: 1px;
}

.preloader-subtitle {
    font-family: 'Heiti SC', 'Microsoft YaHei', sans-serif; /* Common Chinese fonts */
    font-size: 1.6rem;
    color: #00509e; /* Primary blue */
    margin-bottom: 40px;
    animation: pulse 2s infinite ease-in-out;
    animation-delay: 0.3s;
    font-weight: 300;
}

.loading-bar-container {
    width: 300px;
    height: 10px;
    background-color: rgba(224, 224, 224, 0.3);
    border-radius: 5px;
    overflow: hidden;
    margin: 0 auto;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.loading-bar {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #0779e4, #00509e, #0779e4);
    border-radius: 5px;
    animation: loading 2.5s ease-in-out infinite;
    transform-origin: left;
}

/* Enhanced Animations */
@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.03);
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes loading {
    0% {
        transform: translateX(-100%);
        width: 30%;
    }
    50% {
        transform: translateX(0%);
        width: 80%;
    }
    100% {
        transform: translateX(100%);
        width: 30%;
    }
}

/* Add a subtle spinner for extra visual appeal */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(7, 121, 228, 0.2);
    border-top: 3px solid #0779e4;
    border-radius: 50%;
    margin: 20px auto;
    animation: spin 1.2s linear infinite;
    display: none;
}

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