/* 易链 AI 页 */

.ai-page-section {
    padding: 3rem 0 4.5rem;
    position: relative;
    z-index: 1;
}

.ai-flow-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto 2.5rem;
}

.ai-flow-step {
    text-align: center;
    padding: 1.15rem 1rem;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 14px;
    box-shadow: 0 6px 20px rgba(15, 23, 42, 0.05);
}

.ai-flow-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    color: #0f766e;
    background: rgba(34, 211, 238, 0.12);
    border: 1px solid rgba(34, 211, 238, 0.25);
    margin-bottom: 0.65rem;
}

.ai-flow-step strong {
    display: block;
    font-size: 0.9375rem;
    color: #0b1224;
    margin-bottom: 0.3rem;
}

.ai-flow-step span {
    font-size: 0.8125rem;
    color: #64748b;
    line-height: 1.55;
}

.ai-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.35rem;
    max-width: 1100px;
    margin: 0 auto;
}

.ai-card {
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(14px);
    border-radius: 18px;
    padding: 2rem 1.75rem;
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.06);
    transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #14b8a6, #6366f1);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.ai-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 48px rgba(13, 148, 136, 0.1);
    border-color: rgba(34, 211, 238, 0.35);
}

.ai-card:hover::before {
    opacity: 1;
}

.ai-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, rgba(13, 148, 136, 0.12), rgba(99, 102, 241, 0.1));
    border: 1px solid rgba(13, 148, 136, 0.18);
}

.ai-card-icon svg {
    width: 24px;
    height: 24px;
    stroke: #0d9488;
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.ai-card h3 {
    font-size: 1.25rem;
    color: #0b1224;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.ai-card > p {
    font-size: 0.9375rem;
    color: #5c6578;
    line-height: 1.75;
    margin-bottom: 1.1rem;
}

.ai-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ai-card li {
    font-size: 0.875rem;
    color: #475569;
    padding: 0.45rem 0 0.45rem 1.25rem;
    position: relative;
    line-height: 1.65;
    border-bottom: 1px solid #f1f5f9;
}

.ai-card li:last-child { border-bottom: none; }

.ai-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.85rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, #14b8a6, #6366f1);
}

@media (max-width: 720px) {
    .ai-flow-strip {
        grid-template-columns: 1fr;
    }
}