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

/* 定义设计系统变量 (用于配合Tailwind无法覆盖的场景) */
:root {
    --color-neutral-bg: #F8F8F8;
    --color-white: #FFFFFF;
    --color-gold: #E6D2B5;
    --color-black: #333333;
    --color-cream: #F5F1EA;
    --color-gray: #EAEAEA;
    --transition-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 基础排版设置 */
body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--color-black);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .font-serif {
    font-family: 'Noto Serif SC', serif;
    font-weight: 300;
}

/* 滚动条高级感定制 */
::-webkit-scrollbar {
    width: 4px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #d4d4d4;
    border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-gold);
}

/* 文本选区样式 */
::selection {
    background: var(--color-gold);
    color: var(--color-white);
}

/* 动画工具类：向上渐入 */
.fade-in-up {
    animation: fadeInUp 1s ease-out forwards;
    opacity: 0;
    transform: translateY(30px);
}

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

/* 图片悬停微动效 (高级感核心) */
.img-hover-zoom {
    overflow: hidden;
    position: relative;
    display: block;
}

.img-hover-zoom img {
    transition: transform 1.2s var(--transition-smooth), opacity 0.5s ease;
    width: 100%;
    height: 100%;
    object-fit: cover;
    will-change: transform;
}

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

/* 图片蒙版遮罩 */
.hover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
}

.img-hover-zoom:hover .hover-overlay {
    opacity: 1;
}

/* 导航栏动态隐藏 */
.nav-sticky {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    transition: transform 0.4s ease-in-out, background-color 0.4s ease;
}

.nav-hidden {
    transform: translateY(-100%);
}

.nav-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

/* 骨架屏加载态 */
.skeleton-loader {
    background: linear-gradient(90deg, #f0f0f0 25%, #e6e6e6 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
}

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

/* 极简分割线 */
.divider-elegant {
    height: 1px;
    width: 100%;
    background: linear-gradient(to right, transparent, var(--color-gray), transparent);
    margin: 4rem 0;
    opacity: 0.6;
}

/* 动画延迟辅助类 */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-500 { animation-delay: 0.5s; }

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

.loader-hidden {
    opacity: 0;
    visibility: hidden;
}

/* 移动端菜单过渡 */
.mobile-menu-enter {
    opacity: 0;
    transform: translateY(-10px);
}
.mobile-menu-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.3s ease-out;
}