/* 支付初始化加载界面样式 */
.payment-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 1;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.payment-loading-overlay.fade-out {
    opacity: 0;
    visibility: hidden;
}

.payment-loading-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    max-width: 320px;
    width: 90%;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    animation: paymentLoadingAppear 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.payment-loading-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 2s infinite;
}

.payment-loading-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem auto;
    position: relative;
}

.payment-icon-bg {
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: iconPulse 2s ease-in-out infinite;
}

.payment-icon-svg {
    width: 30px;
    height: 30px;
    color: white;
    animation: iconRotate 3s linear infinite;
}

.payment-loading-title {
    color: white;
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.payment-loading-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin: 0 0 1.5rem 0;
    font-weight: 300;
}

.payment-loading-progress {
    width: 100%;
    margin-bottom: 1rem;
}

.payment-progress-bar {
    width: 100%;
    height: 3px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 0.8rem;
}

.payment-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    background-size: 300% 100%;
    border-radius: 2px;
    animation: paymentProgressFlow 2s ease-in-out infinite;
    width: 70%;
    transition: width 0.3s ease;
}

.payment-loading-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.payment-step {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    animation: stepBlink 1.5s ease-in-out infinite;
}

.payment-step:nth-child(1) { animation-delay: 0s; }
.payment-step:nth-child(2) { animation-delay: 0.3s; }
.payment-step:nth-child(3) { animation-delay: 0.6s; }
.payment-step:nth-child(4) { animation-delay: 0.9s; }

.payment-step.active {
    background: white;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.payment-loading-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.85rem;
    margin: 0;
    animation: textFade 2s ease-in-out infinite;
}

/* 支付方式图标 */
.payment-methods-preview {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 1rem;
    opacity: 0.7;
}

.payment-method-icon {
    width: 32px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: white;
    animation: methodIconFloat 2s ease-in-out infinite;
}

.payment-method-icon:nth-child(1) { animation-delay: 0s; }
.payment-method-icon:nth-child(2) { animation-delay: 0.5s; }
.payment-method-icon:nth-child(3) { animation-delay: 1s; }

/* 动画定义 */
@keyframes paymentLoadingAppear {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.3);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 255, 255, 0);
    }
}

@keyframes iconRotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes paymentProgressFlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes stepBlink {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

@keyframes textFade {
    0%, 100% {
        opacity: 0.9;
    }
    50% {
        opacity: 0.6;
    }
}

@keyframes methodIconFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-3px);
    }
}

/* 响应式设计 */
@media (max-width: 480px) {
    .payment-loading-container {
        padding: 1.5rem;
        max-width: 280px;
        border-radius: 16px;
    }
    
    .payment-loading-title {
        font-size: 1.1rem;
    }
    
    .payment-loading-subtitle {
        font-size: 0.8rem;
    }
    
    .payment-loading-icon {
        width: 50px;
        height: 50px;
    }
    
    .payment-icon-svg {
        width: 24px;
        height: 24px;
    }
}

/* 减少动画效果（用户偏好） */
@media (prefers-reduced-motion: reduce) {
    .payment-loading-container,
    .payment-loading-container::before,
    .payment-icon-bg,
    .payment-icon-svg,
    .payment-progress-fill,
    .payment-step,
    .payment-loading-text,
    .payment-method-icon {
        animation: none;
    }
    
    .payment-loading-overlay {
        transition: opacity 0.2s ease;
    }
}