/* 欢迎页面样式 - 无粒子效果版本 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* 当有壁纸时，移除默认背景 */
body.has-wallpaper {
    background: none;
}

/* 欢迎页面内容样式 */
.welcome-container {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    background: transparent;
    backdrop-filter: none;
}

.welcome-content {
    max-width: 800px;
    margin: 0 auto;
    /* 白色容器样式会通过white-theme.css应用 */
}

.welcome-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-text-color);
    margin-bottom: 1rem;
    text-shadow: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

/* 有壁纸时增强文字可读性 - 加强阴影效果 */
body.has-wallpaper .welcome-title {
    text-shadow: 0 3px 6px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.6), 0 1px 2px rgba(0, 0, 0, 0.8);
}

/* 深色壁纸下的文字阴影 - 增强效果 */
body.dark-wallpaper .welcome-title {
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.9), 0 2px 4px rgba(0, 0, 0, 0.95), 0 1px 2px rgba(255, 255, 255, 0.1);
}

.welcome-subtitle {
    font-size: 1.3rem;
    color: var(--secondary-text-color);
    margin-bottom: 2rem;
    line-height: 1.6;
    text-shadow: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

/* 有壁纸时增强副标题可读性 - 加强阴影效果 */
body.has-wallpaper .welcome-subtitle {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.6);
}

/* 深色壁纸下的副标题阴影 - 增强效果 */
body.dark-wallpaper .welcome-subtitle {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8), 0 1px 2px rgba(0, 0, 0, 0.9), 0 0 1px rgba(255, 255, 255, 0.1);
}

.welcome-description {
    font-size: 1.1rem;
    color: var(--secondary-text-color);
    margin-bottom: 3rem;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

/* 有壁纸时增强描述文字可读性 - 加强阴影效果 */
body.has-wallpaper .welcome-description {
    text-shadow: 0 2px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* 深色壁纸下的描述文字阴影 - 增强效果 */
body.dark-wallpaper .welcome-description {
    text-shadow: 0 2px 3px rgba(0, 0, 0, 0.7), 0 1px 2px rgba(0, 0, 0, 0.8), 0 0 1px rgba(255, 255, 255, 0.1);
}

.welcome-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.welcome-btn {
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.welcome-btn.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.welcome-btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.6);
}

/* 壁纸适配的按钮样式 */
body.has-wallpaper .welcome-btn.primary {
    background: linear-gradient(135deg, rgba(26, 115, 232, 0.9), rgba(66, 133, 244, 0.9));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(26, 115, 232, 0.3);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

body.has-wallpaper .welcome-btn.primary:hover {
    background: linear-gradient(135deg, rgba(26, 115, 232, 1), rgba(66, 133, 244, 1));
    border-color: rgba(26, 115, 232, 0.5);
    box-shadow: 0 12px 35px rgba(26, 115, 232, 0.4);
}

.welcome-btn.secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: none;
}

.welcome-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

.welcome-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    max-width: 1000px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: none;
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-text-color);
    opacity: 0.9;
    margin-bottom: 1rem;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-text-color);
    margin-bottom: 0.5rem;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.feature-description {
    color: var(--secondary-text-color);
    line-height: 1.6;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

/* 有壁纸时增强特性文字可读性 */
body.has-wallpaper .feature-icon,
body.has-wallpaper .feature-title {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 0 1px rgba(0, 0, 0, 0.4);
}

body.has-wallpaper .feature-description {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 0 1px rgba(0, 0, 0, 0.3);
}

/* 深色壁纸下的特性文字阴影 */
body.dark-wallpaper .feature-icon,
body.dark-wallpaper .feature-title {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6), 0 0 1px rgba(0, 0, 0, 0.7);
}

body.dark-wallpaper .feature-description {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 0 1px rgba(0, 0, 0, 0.6);
}

@keyframes title-glow {
    0% {
        text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }
    100% {
        text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 255, 255, 0.3);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .welcome-title {
        font-size: 2.5rem;
    }
    
    .welcome-subtitle {
        font-size: 1.1rem;
    }
    
    .welcome-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .welcome-btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .welcome-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}