/* 加载页面样式 - 现代科技风格 */

.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--dark-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

/* 加载页背景动画 */
.page-loader::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(rgba(123, 47, 249, 0.15) 1px, transparent 1px),
        radial-gradient(rgba(0, 229, 255, 0.15) 1px, transparent 1px);
    background-size: 50px 50px, 40px 40px;
    background-position: 0 0, 25px 25px;
    opacity: 0;
    animation: grid-fade-in 1.5s forwards;
}

@keyframes grid-fade-in {
    to { opacity: 1; }
}

.loader-content {
    text-align: center;
    position: relative;
    padding: 40px 30px;
    border-radius: 20px;
    background: rgba(18, 18, 30, 0.8);
    box-shadow: 0 0 30px rgba(0, 229, 255, 0.3), 0 0 60px rgba(123, 47, 249, 0.2);
    border: 1px solid rgba(0, 229, 255, 0.3);
    backdrop-filter: blur(15px);
    transform: translateY(20px);
    opacity: 0;
    animation: content-fade-in 0.8s forwards 0.3s;
    max-width: 90%;
    width: 380px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

@keyframes content-fade-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.loader-logo {
    width: 110px;
    height: auto;
    max-height: 110px;
    object-fit: contain;
    margin-bottom: 20px;
    animation: pulse 1.5s infinite alternate;
    filter: drop-shadow(0 0 12px rgba(0, 229, 255, 0.7));
}

.loader-text {
    color: var(--primary-color);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    position: relative;
    display: inline-block;
    text-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
    margin: 0 0 5px 0;
}

.loader-text::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), var(--secondary-color));
    animation: line-grow 1.5s forwards 0.5s;
}

@keyframes line-grow {
    to {
        width: 100%;
    }
}

.loader-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(0, 229, 255, 0.3);
    border-top: 3px solid var(--primary-color);
    border-right: 3px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 18px auto 0;
}

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

@keyframes pulse {
    0% {
        opacity: 0.7;
        transform: scale(0.98);
        filter: drop-shadow(0 0 5px rgba(0, 229, 255, 0.5));
    }
    100% {
        opacity: 1;
        transform: scale(1.02);
        filter: drop-shadow(0 0 15px rgba(0, 229, 255, 0.8));
    }
}

.page-loader.loaded {
    opacity: 0;
    visibility: hidden;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-loader::before {
        background-size: 40px 40px, 30px 30px;
        background-position: 0 0, 20px 20px;
    }
    
    .loader-content {
        padding: 25px 20px;
        width: 300px;
    }
    
    .loader-logo {
        width: 90px;
        max-height: 90px;
        margin-bottom: 15px;
    }
    
    .loader-text {
        font-size: 16px;
        letter-spacing: 1.5px;
    }
    
    .loader-text::after {
        bottom: -8px;
        height: 1.5px;
    }
}

@media (max-width: 480px) {
    .page-loader::before {
        background-size: 30px 30px, 25px 25px;
        background-position: 0 0, 15px 15px;
    }
    
    .loader-content {
        padding: 20px 15px;
        width: 280px;
    }
    
    .loader-logo {
        width: 80px;
        max-height: 80px;
        margin-bottom: 12px;
    }
    
    .loader-text {
        font-size: 14px;
        letter-spacing: 1px;
    }
    
    .loader-text::after {
        bottom: -6px;
        height: 1px;
    }
    
    .loader-spinner {
        width: 30px;
        height: 30px;
        margin-top: 15px;
        border-width: 2px;
    }
    
    @keyframes pulse {
        0% {
            opacity: 0.7;
            transform: scale(0.98);
            filter: drop-shadow(0 0 3px rgba(0, 229, 255, 0.5));
        }
        100% {
            opacity: 1;
            transform: scale(1.02);
            filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.8));
        }
    }
}