<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f8f9fa;
    color: #333;
    overflow-x: hidden;
    line-height: 1.6;
}
/* 可隐藏的悬浮菜单 */
.floating-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    padding: 15px 25px;
    z-index: 1000;
    transition: transform 0.4s ease;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
.floating-header.hidden {
    transform: translateY(-100%);
}
h1 {
    font-weight: 300;
    font-size: 1.5rem;
    margin-bottom: 5px;
    color: #2c3e50;
}
.category-info {
    font-size: 0.95rem;
    color: #7f8c8d;
}
/* 全屏瀑布流 */
.waterfall {
    column-count: 5;
    column-gap: 8px;
    width: 100%;
    padding-top: 80px;
}
@media (max-width: 1600px) {
    .waterfall { column-count: 4; }
}
@media (max-width: 1200px) {
    .waterfall { column-count: 3; }
}
@media (max-width: 800px) {
    .waterfall { column-count: 2; }
}
@media (max-width: 500px) {
    .waterfall { column-count: 1; }
}
.card {
    break-inside: avoid;
    margin-bottom: 8px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    background: white;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}
.card img {
    width: 100%;
    display: block;
    cursor: pointer;
}
/* 底部进度指示器 */
.progress {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(0, 0, 0, 0.1);
    z-index: 1000;
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #4facfe, #00f2fe);
    transition: width 0.4s ease;
}
.group-indicator {
    position: fixed;
    bottom: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #2c3e50;
    z-index: 1000;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.05);
}
/* 提示信息 */
.hint {
    position: fixed;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #2c3e50;
    z-index: 1000;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    opacity: 0.9;
    transition: opacity 3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}
.hint.fade {
    opacity: 0;
}
</style>
