/* Fade in animation */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in {
    animation: fadeIn 1s ease-in;
}

/* Slide up animation */
@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.slide-up {
    animation: slideUp 0.8s ease-out;
}

/* Scale in animation */
@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.scale-in {
    animation: scaleIn 0.6s ease-out;
}

/* Scroll reveal animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Hover animations */
.hover-grow {
    transition: transform 0.3s ease;
}

.hover-grow:hover {
    transform: scale(1.05);
}

/* Loading animation */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.loading {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #006DDA;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Pulse animation */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Fade in up animation for features */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card {
    opacity: 0;
}

.feature-card.visible {
    animation: fadeInUp 0.6s ease forwards;
}

/* Stagger delay for multiple elements */
.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.3s; }
.feature-card:nth-child(3) { animation-delay: 0.5s; }

/* Mobile menu animation */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-nav.active {
    animation: slideDown 0.3s ease forwards;
}

/* Timeline animations for mobile */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* Mobile timeline animations */
.mobile-timeline-item {
    opacity: 0;
}

/* 左侧卡片动画 */
.mobile-timeline-item:nth-child(odd).animate {
    animation: fadeInLeft 0.6s ease forwards;
}

/* 右侧卡片动画 */
.mobile-timeline-item:nth-child(even).animate {
    animation: fadeInRight 0.6s ease forwards;
}

/* 时间点圆圈动画 */
.mobile-timeline-item.animate::before {
    animation: scaleIn 0.3s ease forwards 0.3s;
}

/* 响应超小屏幕的动画 */
@media screen and (max-width: 480px) {
    .mobile-timeline-item.animate {
        animation: fadeInRight 0.6s ease forwards !important;
    }
}