.logo-container {
    position: relative;
    width: 200px;
    height: 200px;
    background: #1a2b3c;
    overflow: hidden;
    border: 3px solid #4a5b6c;
    box-shadow: 0 0 10px rgba(0, 100, 255, 0.3);
}

/* 复古扫描线效果 */
.logo-container::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(0deg,
            rgba(0, 0, 0, 0) 0%,
            rgba(255, 255, 255, 0.1) 10%,
            rgba(0, 0, 0, 0.1) 20%);
    background-size: 100% 4px;
    animation: scanline 2s linear infinite;
}

/* 鲨鱼主体 */
.shark {
    position: absolute;
    left: 20%;
    top: 25%;
    animation: swim 3s ease-in-out infinite;
}

.shark-body {
    width: 60px;
    height: 30px;
    background: #7f8fa6;
    border-radius: 5px;
    transform: skew(-10deg);
    position: relative;
}

/* 鱼鳍 */
.fin {
    position: absolute;
    left: -10px;
    top: 5px;
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 20px solid #667a8f;
    transform: rotate(30deg);
}

/* 尾巴 */
.tail {
    position: absolute;
    right: -20px;
    top: 5px;
    width: 0;
    height: 0;
    border-top: 15px solid transparent;
    border-bottom: 15px solid transparent;
    border-left: 20px solid #667a8f;
}

/* 眼睛 */
.eye {
    position: absolute;
    right: 15px;
    top: 10px;
    width: 8px;
    height: 8px;
    background: #ff4757;
    border-radius: 50%;
    box-shadow: 0 0 5px #ff4757;
}

/* 像素风格牙齿 */
.teeth {
    position: absolute;
    right: -10px;
    top: 12px;
    width: 20px;
    height: 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
}

.tooth {
    width: 4px;
    height: 6px;
    background: #fff;
}

/* 复古动画效果 */
@keyframes swim {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

@keyframes scanline {
    from {
        background-position: 0 0;
    }

    to {
        background-position: 0 100%;
    }
}