/* 液态玻璃效果样式 */
:root {
    /* 柔和主题主色调 */
    --primary-color: #6b8eaf;
    --secondary-color: #8ea6cb;
    --tertiary-color: #5a7ba0;
    --bg-gradient: linear-gradient(135deg, #6b8eaf 0%, #8ea6cb 50%, #5a7ba0 100%);
    
    /* 液态玻璃效果变量 */
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(107, 142, 175, 0.37);
    --glass-blur: 10px;
    --glass-hover: rgba(255, 255, 255, 0.25);
}

/* 雪花、云朵和枫叶装饰 */
.snowflake {
    position: absolute;
    color: #fff;
    font-size: 1em;
    animation: snowfall linear infinite;
    opacity: 0.8;
}

.cloud {
    position: absolute;
    color: rgba(255, 255, 255, 0.6);
    font-size: 2em;
    animation: float ease-in-out infinite;
}

/* 枫叶装饰 */
.maple-leaf {
    position: absolute;
    color: #ff6b35;
    font-size: 1.5em;
    animation: leafFall linear infinite;
    opacity: 0.7;
    z-index: 1;
    transform-origin: center;
}

/* 雪花飘落动画 - 更符合物理逻辑 */
@keyframes snowfall {
    0% { 
        transform: translateY(-10vh) translateX(0) rotate(0deg); 
        opacity: 0;
    }
    10% {
        opacity: 0.8;
    }
    100% { 
        transform: translateY(110vh) translateX(calc(50vw * var(--random-x, 1))) rotate(360deg); 
        opacity: 0; 
    }
}

/* 枫叶飘落动画 - 带旋转和摇摆 */
@keyframes leafFall {
    0% { 
        transform: translateY(-10vh) translateX(0) rotate(0deg); 
        opacity: 0;
    }
    10% {
        opacity: 0.7;
    }
    100% { 
        transform: translateY(110vh) translateX(calc(60vw * var(--random-x, 1))) rotate(720deg); 
        opacity: 0; 
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* 液态玻璃卡片效果 */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
}

.glass-card:hover {
    background: var(--glass-hover);
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(107, 142, 175, 0.45);
}

/* 导航栏液态玻璃效果 */
.glass-nav {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* 按钮液态玻璃效果 */
.glass-btn {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    color: white;
    padding: 0.8rem 1.8rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* 标题液态玻璃效果 */
.glass-title {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1));
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: 12px;
    padding: 1rem 2rem;
    display: inline-block;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* 容器液态玻璃效果 */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 2rem;
}

/* 卡片网格布局 */
.glass-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* 渐变背景效果 */
.gradient-bg {
    background: var(--bg-gradient);
}

.gradient-bg-2 {
    background: linear-gradient(135deg, #6b8eaf 0%, #8ea6cb 100%);
}

.gradient-bg-3 {
    background: linear-gradient(135deg, #8ea6cb 0%, #5a7ba0 100%);
}

/* 平滑滚动效果 */
html {
    scroll-behavior: smooth;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .glass-grid {
        grid-template-columns: 1fr;
    }
    
    .glass-container {
        padding: 1.5rem;
    }
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
}