/* 全屏欢迎界面 - AI对话风格 */
.welcome-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #f9fafb;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
    padding: 2rem;
    box-sizing: border-box;
}

.welcome-content {
    text-align: center;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
}

.gradient-000 {
    background: linear-gradient(90deg, #4285f4, #34a853, #ffff00, #800080);
}

.gradient-00 {
    background: linear-gradient(90deg, #4285f4, #34a853, #800080, #ea4335);
}

.gradient-0 {
    background: linear-gradient(90deg, #0000ff, #00ff00, #800080);
}

.gradient-1 {
    background: linear-gradient(90deg, #800080, #993399, #b366b3, #cc99cc);
}

.gradient-2 {
    background: linear-gradient(90deg, #800080, #c864c8, #e699e6, #ffcce6);
}

.gradient-3 {
    background: linear-gradient(90deg, #800080, #663399, #4d4dff, #3399ff);
}

.gradient-4 {
    background: linear-gradient(90deg, #4a004a, #800080, #b300b3, #e600e6);
}

.gradient-5 {
    background: linear-gradient(90deg, #800080, #b38f00, #e6c800, #ffeb99);
}

.gradient-6 {
    background: linear-gradient(90deg, #800080, #4d9900, #80ff00, #bfff80);
}

.gradient-7 {
    background: linear-gradient(90deg, #800080, #4b0082, #0000ff, #00ff00, #ffff00, #ff7f00, #ff0000);
}

.gradient-8 {
    background: linear-gradient(90deg, rgba(128, 0, 128, 0.2), rgba(128, 0, 128, 0.5), rgba(128, 0, 128, 0.8), rgba(128, 0, 128, 1));
}

.welcome-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1a1a1a;
    /*background: linear-gradient(90deg, #4285f4, #34a853, #800080, #ea4335); !* 蓝绿紫红 *!*/
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradient 8s ease infinite;
    background-size: 300% 300%;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.welcome-subtitle {
    font-size: 1.25rem;
    color: #5f6368;
    margin-bottom: 3rem;
    max-width: 600px;
}


/* 快速操作按钮 */
.quick-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
    max-width: 650px;
}

.quick-action-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s ease;
    background-color: #f1f3f4;
    color: #3c4043;
    white-space: nowrap;
}

.quick-action-btn:hover {
    background-color: #e8eaed;
    /*transform: translateY(-2px);*/
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.quick-action-btn i {
    margin-right: 0.5rem;
}

/* 页脚 */
.footer-info {
    margin-top: auto;
    padding-top: 2rem;
    font-size: 0.8rem;
    color: #70757a;
}

.footer-info a {
    color: #70757a;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-info a:hover {
    color: #4285f4;
    text-decoration: underline;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .welcome-title {
        font-size: 2rem;
    }

    .welcome-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }


    .quick-actions {
        flex-direction: column;
        width: 100%;
    }

    .quick-action-btn {
        width: 100%;
    }
}