/* 登录按钮容器样式 - 优化版 */
.login-buttons {
    display: flex;
    gap: 20px;
    margin: 30px 0;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

/* 统一按钮基础样式 - 优化版 */
.login-btn,
.qq-login-btn,
.scan-login-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 0;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    cursor: pointer;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
    min-height: 52px;
    width: 150px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

/* 按钮悬浮效果 - 统一 */
.login-btn:hover,
.qq-login-btn:hover,
.scan-login-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.2);
}

/* 按钮点击效果 - 统一 */
.login-btn:active,
.qq-login-btn:active,
.scan-login-btn:active {
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.15);
}

/* 按钮光晕效果 */
.login-btn::before,
.qq-login-btn::before,
.scan-login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
    z-index: -1;
}

.login-btn:hover::before,
.qq-login-btn:hover::before,
.scan-login-btn:hover::before {
    left: 100%;
}

/* 账号登录按钮特定样式 */
.login-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* QQ登录按钮特定样式 */
.qq-login-btn {
    background: linear-gradient(135deg, #12b7f5 0%, #0084ff 100%);
    color: white;
}

/* 扫码登录按钮特定样式 */
.scan-login-btn {
    background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    color: white;
}

/* 图标样式优化 */
.qq-login-btn i,
.scan-login-btn i {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.login-btn:hover i,
.qq-login-btn:hover i,
.scan-login-btn:hover i {
    transform: scale(1.1);
}

/* 说明区域样式优化 */
.form-container .instructions {
    margin-top: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
    border-left: 4px solid #667eea;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.form-container .instructions h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 18px;
    font-weight: 600;
}

.form-container .instructions p {
    color: #555;
    margin-bottom: 8px;
    line-height: 1.6;
    font-size: 14px;
}

.form-container .instructions p:last-child {
    margin-bottom: 0;
}

/* QQ未配置提示样式 */
.form-container .qq-warning {
    margin-top: 20px;
    padding: 15px;
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-radius: 6px;
    border-left: 4px solid #ffc107;
}

.form-container .qq-warning p {
    color: #856404;
    margin: 0;
    font-size: 14px;
}

/* 响应式调整 - 优化 */
@media (max-width: 768px) {
    .login-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .login-btn,
    .qq-login-btn,
    .scan-login-btn {
        width: 100%;
        max-width: 280px;
        padding: 16px 0;
        margin: 0 auto;
    }
    
    .form-container .instructions {
        padding: 15px;
        margin-top: 25px;
    }
}

@media (max-width: 480px) {
    .login-buttons {
        gap: 12px;
    }
    
    .login-btn,
    .qq-login-btn,
    .scan-login-btn {
        width: 100%;
        max-width: 260px;
        font-size: 15px;
        padding: 15px 0;
    }
    
    .form-container .instructions {
        padding: 12px;
        font-size: 13px;
    }
}

/* 按钮容器动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-buttons {
    animation: fadeInUp 0.6s ease-out;
}