/* 引入思源黑体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

/* 全局基础样式 */
:root {
    --color-text-main: #333333;
    --color-text-sub: #666666;
    --color-bg-light: #f5f5f5;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    color: var(--color-text-main);
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #d1d5db; /* gray-300 */
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #9ca3af; /* gray-400 */
}

/* 文本选中样式 */
::selection {
    background: var(--color-text-main);
    color: #ffffff;
}

/* 图片容器微交互 */
.img-hover-zoom {
    overflow: hidden;
    position: relative;
}

.img-hover-zoom img {
    transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

.img-hover-zoom:hover img {
    transform: scale(1.03);
}

/* 渐入动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }

/* 极简加载状态 */
.loading-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}