/* 引入字体：Montserrat用于标题，Noto Sans SC用于正文 */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600&family=Noto+Sans+SC:wght@300;400;500&display=swap');

:root {
    --color-primary: #343A40;
    --color-accent: #E27D60;
    --color-bg-light: #F8F9FA;
}

/* 基础设置 */
html {
    scroll-behavior: smooth;
}

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

.font-montserrat {
    font-family: 'Montserrat', sans-serif;
}

/* 选中文本颜色 */
::selection {
    background-color: var(--color-accent);
    color: #ffffff;
}

/* 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;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}

/* 导航栏动态效果 */
.nav-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    padding-top: 1rem !important;
    padding-bottom: 1rem !important;
}

/* 动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 滚动动画类 - 配合JS IntersectionObserver使用 */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* 延迟类 */
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

/* 图片悬停交互 */
.img-zoom-wrapper {
    overflow: hidden;
}

.img-zoom-hover {
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.5s ease;
    will-change: transform;
}

.group:hover .img-zoom-hover {
    transform: scale(1.05);
}

/* 页面加载遮罩 */
#page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.6s ease-out, visibility 0.6s ease-out;
}

#page-loader.loaded {
    opacity: 0;
    visibility: hidden;
}

/* 瀑布流兼容样式 */
.masonry-column {
    padding-left: 1rem;
    background-clip: padding-box;
}

/* 极简按钮悬停线动画 */
.hover-line {
    position: relative;
}
.hover-line::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: currentColor;
    transition: width 0.3s ease;
}
.hover-line:hover::after {
    width: 100%;
}