/* Google Fonts loaded via preload in HTML for better performance */

:root {
    --spark-blue: #0070bb;
    --spark-orange: #f39200;
    --spark-red: #e31b23;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    scroll-behavior: smooth;
}

/* 入场动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.8s ease-out forwards;
}

.delay-1 {
    animation-delay: 0.2s;
    opacity: 0;
}

.delay-2 {
    animation-delay: 0.4s;
    opacity: 0;
}

.delay-3 {
    animation-delay: 0.6s;
    opacity: 0;
}

/* 呼吸灯效果 */
@keyframes pulse-spark {
    0% {
        transform: scale(1);
        filter: brightness(100%);
    }

    50% {
        transform: scale(1.05);
        filter: brightness(110%);
    }

    100% {
        transform: scale(1);
        filter: brightness(100%);
    }
}

.spark-pulse {
    display: inline-block;
    animation: pulse-spark 3s infinite ease-in-out;
}

/* 卡片悬停提升效果 */
.hover-lift {
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.bg-spark-blue {
    background-color: var(--spark-blue);
}

.text-spark-blue {
    color: var(--spark-blue);
}

.bg-spark-orange {
    background-color: var(--spark-orange);
}

.text-spark-orange {
    color: var(--spark-orange);
}

.bg-spark-red {
    background-color: var(--spark-red);
}

/* 渐变背景装饰 */
.glass-gradient {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.4) 100%);
    backdrop-filter: blur(10px);
}