/* 创建一些基本的占位图片样式，用于替代实际图片 */
.placeholder-logo {
    width: 30px;
    height: 30px;
    background: linear-gradient(45deg, #4285f4, #34a853);
    border-radius: 5px;
    display: inline-block;
}

.placeholder-icon {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #4285f4, #34a853, #fbbc05, #ea4335);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.placeholder-model {
    width: 100%;
    height: 100%;
    background-color: #f5f5f5;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-size: 12px;
    font-weight: bold;
}

.placeholder-avatar {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #4285f4, #a142f4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 24px;
}

.placeholder-qrcode {
    width: 100%;
    max-width: 200px;
    height: 200px;
    background-color: #f5f5f5;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    position: relative;
}

.placeholder-qrcode:before {
    content: "联系二维码";
    color: #666;
    font-size: 14px;
}

.placeholder-qrcode:after {
    content: "";
    position: absolute;
    width: 70%;
    height: 70%;
    border: 2px solid #666;
    border-radius: 5px;
}