模板:Neon/styles.css

.neon-item {
    margin: 0;
    cursor: pointer;
    display: inline-block;
    background: #000;
    color: var(--font, #fff);
    text-shadow:
        0 0 2px var(--stroke, #fff),
        0 0 6px var(--glow, #0ff),
        0 0 12px var(--glow);
    transition: opacity 0.15s ease, filter 0.15s ease;
}

.neon-item:hover {
    animation: neon-breathe 2s ease-in-out infinite;
}

.neon-auto {
    margin: 0;
    display: inline-block;
    background: #000;
    color: var(--font, #fff);
    text-shadow:
        0 0 2px var(--stroke, #fff),
        0 0 8px var(--glow, #0ff),
        0 0 16px var(--glow),
        0 0 30px var(--glow);
    animation: neon-breathe 2.5s ease-in-out infinite;
}

@keyframes neon-breathe {
    0%, 100% { opacity: 0.7; filter: brightness(0.6); }
    50%      { opacity: 1;   filter: brightness(1.3); }
}