#how .sub {
    max-width: 600px;
}

.flow-wrap {
    position: relative;
    padding: 20px 0
}

.flow-line {
    position: absolute;
    top: 68px;
    left: 8%;
    right: 8%;
    height: 2px;
    background: linear-gradient(90deg, var(--ai-indigo) 0%, var(--ai-violet) 33%, var(--ai-cyan) 66%, var(--teal) 100%);
    opacity: .5;
    z-index: 0
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1
}

.flow-step {
    text-align: center
}

.flow-node {
    width: 108px;
    height: 108px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid rgba(139, 92, 246, .2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 14px auto 20px;
    position: relative;
    box-shadow: var(--shadow-md)
}

.flow-node::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--ai-indigo), var(--ai-violet));
    opacity: 0;
    z-index: -1;
    filter: blur(8px);
    transition: opacity .3s
}

.flow-step:hover .flow-node::after {
    opacity: .4
}

.flow-node img {
    width: 46px;
    height: 46px;
    stroke-width: 1.6;
    fill: none;
    stroke: url(#aigrad);
    stroke-linecap: round;
    stroke-linejoin: round
}

.flow-num {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--ai-indigo), var(--ai-violet));
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid #fff;
    letter-spacing: -.02em
}

.flow-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -.02em;
    margin-bottom: 6px
}

.flow-desc {
    font-size: 13px;
    color: var(--body);
    line-height: 1.55;
    font-weight: 400;
    max-width: 220px;
    margin: 0 auto
}

@media(max-width:840px) {
    .flow-steps {
        grid-template-columns: 1fr;
        gap: 24px
    }
    .flow-line {
        display: none
    }
}