/* 基础变量定义 */
:root {
    --primary-gradient: linear-gradient(135deg, #6B3FA0 0%, #41A6F6 100%);
    --accent-color: #FF7EBA;
    --dark-bg: #1A1A2E;
    --light-bg: #F5F5F7;
    --mica-light: rgba(255, 255, 255, 0.7);
    --mica-dark: rgba(30, 30, 46, 0.7);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition-standard: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 自定义工具类 */
.mica-effect {
    background: var(--mica-light);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.dark .mica-effect {
    background: var(--mica-dark);
}

.acrylic-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-md);
    border-radius: 1rem;
    transition: var(--transition-standard);
}

.dark .acrylic-card {
    background: rgba(30, 30, 46, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* 星空背景样式 */
#stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.star {
    position: absolute;
    background: white;
    border-radius: 50%;
    opacity: 0.8;
    animation: twinkle 2s infinite alternate;
}

@keyframes twinkle {
    from { opacity: 0.4; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1.2); }
}

/* 粒子文字动画 */
#logo-text {
    position: relative;
    display: inline-block;
}

/* 导航栏样式增强 */
nav a.active {
    color: var(--accent-color);
}

nav a.active .material-icons {
    animation: bounce 0.5s ease-in-out;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* 滚动触发动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 团队部分额外底部空间 */
#team {
    padding-bottom: 4rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .acrylic-card {
        border-radius: 0.75rem;
        padding: 1rem;
    }

    /* 移动端简化动画 */
    .scroll-animate {
        transition: opacity 0.4s ease-out, transform 0.4s ease-out;
    }
}

/* 页脚样式调整 */
footer {
    /* margin-bottom: 4rem; 已移除过大空白 */
}

/* 加载动画 */
.cloud-loader {
    width: 50px;
    height: 30px;
    background: var(--accent-color);
    border-radius: 50% 50% 0 0;
    position: relative;
    animation: cloudFloat 2s infinite ease-in-out;
}

.cloud-loader::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 30px;
    background: var(--accent-color);
    border-radius: 50%;
    top: -15px;
    left: 10px;
}

@keyframes cloudFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-10px) scale(1.05); }
}

/* 主题切换动画 */
body {
    padding-bottom: 3rem; /* 进一步减少底部空白空间 */
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* 按钮样式 */
.winui-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 0.5rem;
    padding: 0.6rem 1.2rem;
    font-weight: 500;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.winui-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.winui-button:active {
    transform: translateY(0);
}

/* 产品卡片样式 */
.product-tile {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-tile:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(107, 63, 160, 0.1);
}

.dark .product-tile:hover {
    box-shadow: 0 10px 25px rgba(107, 63, 160, 0.3);
}