/* 引入思源黑体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@100;300;400;500;700;900&display=swap');

/* 全局基础设置 */
:root {
    --primary-gray: #F8F9FA;
    --dark-text: #333333;
    --accent-color: #d4a373; /* 默认强调色 */
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--primary-gray);
    color: var(--dark-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

::-webkit-scrollbar-thumb {
    background: #cbd5e1; /* slate-300 */
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8; /* slate-400 */
}

/* 图片颗粒感与现代质感滤镜 */
.img-grain {
    position: relative;
    overflow: hidden;
}

.img-grain::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.08'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 5;
    mix-blend-mode: overlay;
}

/* 基础淡入动效 */
.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

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

/* 延迟工具类 */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-500 { animation-delay: 500ms; }

/* 文本选择颜色 */
::selection {
    background-color: rgba(33, 37, 41, 0.1); /* 深灰背景 */
    color: #000;
}

/* 隐藏滚动条但保留功能 (用于横向滚动区域) */
.scrollbar-hide::-webkit-scrollbar {
    display: none;
}
.scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
}