/* ========== 动画关键帧 ========== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes rotateReverse {
    from { transform: translate(-50%, -50%) rotate(360deg); }
    to { transform: translate(-50%, -50%) rotate(0deg); }
}

.sphere-core svg {
    animation: rotateSelf 30s linear infinite;
    transform-origin: center;
}

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

@keyframes float {
    0%, 100% { transform: translate(-50%, -50%) translateY(0); }
    50% { transform: translate(-50%, -50%) translateY(-10px); }
}

@keyframes floatNode {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.15); }
}

@keyframes avatarPulse {
    0% {
        opacity: 0.8;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(1.15);
    }
}

@keyframes scrollDown {
    0% { top: 6px; opacity: 1; }
    50% { top: 14px; opacity: 0.5; }
    100% { top: 6px; opacity: 1; }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ========== 滚动入场动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}
.reveal-delay-1.in-view { transition-delay: 0.1s; }
.reveal-delay-2.in-view { transition-delay: 0.2s; }
.reveal-delay-3.in-view { transition-delay: 0.3s; }
.reveal-delay-4.in-view { transition-delay: 0.4s; }

/* 业务卡片错位入场 */
.business-card:nth-child(1) { transition-delay: 0s; }
.business-card:nth-child(2) { transition-delay: 0.1s; }
.business-card:nth-child(3) { transition-delay: 0.2s; }
.business-card:nth-child(4) { transition-delay: 0.3s; }

/* 能力六边形错位 */
.cap-item:nth-child(1) { transition-delay: 0s; }
.cap-item:nth-child(2) { transition-delay: 0.05s; }
.cap-item:nth-child(3) { transition-delay: 0.1s; }
.cap-item:nth-child(4) { transition-delay: 0.15s; }
.cap-item:nth-child(5) { transition-delay: 0.2s; }
.cap-item:nth-child(6) { transition-delay: 0.25s; }

/* 数据卡片入场 */
.data-card:nth-child(1) { transition-delay: 0s; }
.data-card:nth-child(2) { transition-delay: 0.1s; }
.data-card:nth-child(3) { transition-delay: 0.2s; }
.data-card:nth-child(4) { transition-delay: 0.3s; }