/* 全局变量与基础设置 */
:root {
    --bg-primary: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --accent-color: #ffffff;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden; /* 防止横向滚动 */
}

/* 首页全屏滚动视差容器 */
.snap-container {
    height: 100vh;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    position: relative;
}

/* 隐藏滚动条但保留功能 */
.snap-container::-webkit-scrollbar,
.no-scrollbar::-webkit-scrollbar {
    display: none;
}
.snap-container,
.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* 每一屏的基础样式 */
.snap-section {
    height: 100vh;
    width: 100%;
    scroll-snap-align: start;
    position: relative;
    overflow: hidden;
}

/* 通用过渡动画 */
.fade-in-up {
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

.delay-200 { animation-delay: 0.2s; }
.delay-400 { animation-delay: 0.4s; }
.delay-600 { animation-delay: 0.6s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 导航栏过渡 */
#navbar {
    transition: background-color 0.4s ease, backdrop-filter 0.4s ease, padding 0.4s ease;
}
#navbar.scrolled {
    background-color: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    padding-top: 1rem;
    padding-bottom: 1rem;
}

/* 图片悬停效果：缩放+遮罩 */
.hover-zoom-container {
    position: relative;
    overflow: hidden;
}

.hover-zoom-img {
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hover-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: opacity 0.5s ease;
}

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

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

/* 瀑布流布局 (Masonry) */
.masonry-grid {
    column-count: 1;
    column-gap: 1.5rem;
}
@media (min-width: 640px) {
    .masonry-grid { column-count: 2; }
}
@media (min-width: 1024px) {
    .masonry-grid { column-count: 3; }
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: 1.5rem;
    position: relative;
}

/* 型格叙事 - 卡片聚焦效果 */
.style-cards-wrapper:hover .style-card {
    filter: brightness(0.4) blur(1px);
    transform: scale(0.98);
}

.style-cards-wrapper .style-card {
    transition: all 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.style-cards-wrapper .style-card:hover {
    filter: brightness(1) blur(0);
    transform: scale(1.05);
    z-index: 20;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

/* 视频背景覆盖层 */
.video-overlay {
    background: linear-gradient(to bottom, rgba(10,10,10,0.3), rgba(10,10,10,0.8));
}

/* 极简加载动画 */
#loader {
    position: fixed;
    inset: 0;
    background-color: #000;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}
.loader-dot {
    width: 8px;
    height: 8px;
    background-color: #fff;
    border-radius: 50%;
    animation: pulse 2s infinite ease-in-out;
}
@keyframes pulse {
    0%, 100% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.5); opacity: 1; }
}

/* 文本选择颜色 */
::selection {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}