/* 引入字体资源 */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;1,400&family=Noto+Serif+SC:wght@700&family=Noto+Sans+SC:wght@300;400;500&display=swap');

/* 基础样式重置与全局设置 */
:root {
    --color-primary-bg: #F5F5F5; /* 高级灰 */
    --color-white: #FFFFFF; /* 纯白 */
    --color-black: #0A0A0A; /* 午夜黑 */
    --color-sand: #E8E3D8; /* 砂岩米 */
    --color-blue: #E9F0F5; /* 雾霭蓝 */
    --color-pink: #F5E9E9; /* 淡陶粉 */
    --color-accent: #8B4513; /* 暗红棕 */
    --transition-speed: 0.3s;
}

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

/* 字体类工具 */
.font-playfair {
    font-family: 'Playfair Display', serif;
}

.font-serif-sc {
    font-family: 'Noto Serif SC', serif;
}

.font-sans-sc {
    font-family: 'Noto Sans SC', sans-serif;
}

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

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

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

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* 动画关键帧 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes scaleUp {
    from { transform: scale(1); }
    to { transform: scale(1.05); }
}

/* 实用类 */
.animate-fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

.animate-slide-in-left {
    animation: slideInLeft 0.8s ease-out forwards;
}

/* 图片容器与遮罩 */
.image-wrapper {
    position: relative;
    overflow: hidden;
}

.image-wrapper img {
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

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

.overlay-hover {
    position: absolute;
    inset: 0;
    background-color: rgba(10, 10, 10, 0.3);
    opacity: 0;
    transition: opacity 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-wrapper:hover .overlay-hover {
    opacity: 1;
}

/* 导航链接动效 */
.nav-link {
    position: relative;
    display: inline-block;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: var(--color-black);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* 页面过渡遮罩 */
.page-transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-white);
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.page-transition-overlay.active {
    opacity: 1;
    pointer-events: all;
}

/* 文本选择颜色 */
::selection {
    background: var(--color-sand);
    color: var(--color-black);
}

/* 隐藏 iframe 滚动条 (针对当前应用被 iframe 加载的情况) */
body.iframe-mode {
    overflow: auto;
}