/* 在 factions.css 中添加 */
:root {
    --btn-glow: rgba(138,43,226,0.8);
    --btn-bg: linear-gradient(
        145deg,
        rgba(42,15,71,0.9) 20%,
        rgba(70,25,115,0.7) 80%
    );
}

.faction-nav {
    position: relative;
    padding: 1rem;
    background: rgba(0,0,0,0.3);
    border-radius: 15px;
    box-shadow: 0 0 30px rgba(138,43,226,0.2);
    margin: 2rem auto;
    width: fit-content;
}

.faction-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    background: var(--btn-bg);
    color: #fff;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
}

/* 全息边框效果 */
.faction-btn::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(
        45deg,
        var(--neon-purple) 0%,
        #9D50FF 50%,
        transparent 100%
    );
    border-radius: 14px;
    z-index: -1;
    animation: borderFlow 3s linear infinite;
}

/* 能量核心光效 */
.faction-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300%;
    height: 300%;
    background: radial-gradient(
        circle,
        rgba(138,43,226,0.3) 0%,
        transparent 70%
    );
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.3s;
}

/* 悬停状态 */
.faction-btn:hover {
    transform: translateY(-3px) scale(1.05);
    text-shadow: 0 0 15px var(--btn-glow);
}

.faction-btn:hover::after {
    opacity: 1;
}

/* 激活状态 */
.faction-btn.active {
    background: linear-gradient(
        145deg,
        rgba(138,43,226,0.8) 30%,
        rgba(147,51,234,0.6) 100%
    );
    box-shadow: 
        0 0 30px var(--btn-glow),
        inset 0 0 15px rgba(255,255,255,0.2);
}

.faction-btn.active::before {
    animation: 
        borderFlow 3s linear infinite,
        pulseGlow 1.5s ease-in-out infinite;
}

/* 按钮文字悬浮效果 */
.faction-btn span {
    display: inline-block;
    transition: transform 0.3s;
}

.faction-btn:hover span {
    transform: translateX(5px);
}

/* 动画定义 */
@keyframes borderFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .faction-nav {
        padding: 0.5rem;
        border-radius: 10px;
    }
    
    .faction-btn {
        padding: 0.8rem 1.2rem;
        font-size: 0.9rem;
    }
}