* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.title {
    text-align: center;
    color: rgb(0, 109, 116);
    margin-bottom: 10px;
    font-size: 28px;
}

.subtitle {
    text-align: center;
    color: rgb(0, 109, 116);
    margin-bottom: 30px;
    font-size: 18px;
}

.logo-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.logo-item {
    width: 30%;
    text-align: center; /* 让内部内容（图片和文字）水平居中 */
    padding: 20px;
    background-color: #fff;
    margin-bottom: 20px;
    cursor: pointer;
    transition: box-shadow 0.3s ease;
    border: 1px solid #eee;
    display: flex;          /* 新增：启用 Flexbox */
    flex-direction: column; /* 垂直排列 */
    align-items: center;    /* 水平居中 */
}
.logo-item img {
    height: auto;
    margin-bottom: 10px;
}

.logo-item p {
    font-size: 14px;
    color: #333;
}

.logo-item:hover {
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 999;
    overflow: auto;
}

.popup-content {
    background-color: white;
    margin: 15% auto;
    padding: 40px;
    width: 80%;
    max-width: 800px;
    position: relative;
    border-radius: 5px;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 28px;
    font-weight: bold;
    color: #333;
    cursor: pointer;
}

.close-btn:hover {
    color: #666;
}

.popup-logo {
    display: block; /* 确保图片是块级元素 */
    height: auto;
    margin: 0 auto 20px; /* 水平居中 + 底部间距 */
}

.popup-title {
    margin-bottom: 20px;
    color: #333;
    font-size: 22px;
}

.popup-desc {
    line-height: 1.8;
    color: #666;
    text-align: left;
}

/* 移动端响应式样式 */
@media (max-width: 768px) {
    .logo-item {
        width: 100%;
        /* 手机上一排只显示一个 */
        margin-bottom: 25px;
    }

    .popup-content {
        margin: 30% auto;
        /* 调整弹窗位置 */
        padding: 20px;
        width: 90%;
    }

    .title {
        font-size: 24px;
    }

    .subtitle {
        font-size: 16px;
    }
}