*{
    padding: 0%;
    margin: 0%;
}

.ai_search--container{
    display: flex;
    height: 100vh;
    width: 100%;
    flex-direction: column;
    align-items: center;
}
main{
    flex:1;
    position: relative;
}

.ai_search--form{
    position: absolute;
    left: 0%;
    bottom: 0%;
    transform: translateX(-50%);
    padding: 10px;
    width: calc(100vw - 60vw);
}


header{
    height: 60px;
    width: 100%;
    background-color: #f5f5f5;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
}

footer{
    height: 60px;
}

/* 文本区域样式 */
#ai_search--input {
    width: 100%;
    min-height: 120px;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    resize: none;
    transition: all 0.3s ease;
    box-sizing: border-box;
    background-color: #ffffff;
    color: #333333;
}

#ai_search--input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

#ai_search--input::placeholder {
    color: #999999;
}

/* 确保表单容器的定位正确 */
.ai_search--form {
    position: absolute;
    left: 50%; /* 改为50%使容器居中 */
    bottom: 0%;
    transform: translateX(-50%);
    padding: 10px;
    width: calc(100vw - 60vw);
    max-width: 600px;
    box-sizing: border-box;
}