:root {
    --sino-gold: #c5a059;
    --sino-black: #1a1a1a;
    --sino-bg: #fdfdfd;
    --sino-grey: #f4f4f4;
    --text-main: #222;
    --text-muted: #888;
    --transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --nav-height: 80px; /* 根据实际导航高度调整 */
}

body {
    background-color: var(--sino-bg);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    margin:0;
}

.hero {padding:80px 0 40px;text-align: center;background: linear-gradient(to bottom, #fff, var(--sino-bg));}
.hero h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700;margin: 15px 0; letter-spacing: -1px; }
.hero-desc { max-width: 1000px; margin: 0 auto; line-height: 1.8; color: #555; font-size: 1.1rem;font-style: italic;}
/* --- 3. 标签筛选区 (Tag Links) --- */
.tag-links {
    max-width: 1320px;
    margin: 0 auto 60px;
    padding: 0 30px;
}

.tag-row {
    display: flex;
    padding: 15px 0;
    border-top: 1px solid #eee;
    align-items: flex-start;
}

.tag-row:last-child { border-bottom: 1px solid #eee; }

.tag-label {
    font-family: sans-serif;
    font-weight: 700;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--sino-black);
    width: 70px;
    flex-shrink: 0;
    padding-top: 8px;
}

.tag-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-items a {
    font-family: sans-serif;
    text-decoration: none;
    color: #666;
    padding: 5px 12px;
    font-size: 13px;
    border: 1px solid transparent;
    transition: var(--transition);
}

.tag-items a:hover,.tag-items a.active {
    color: var(--sino-gold);
    background: #fff;
    border-color: var(--sino-gold);
}


/* --- 4. 产品网格与卡片 --- */
.container { max-width: 1320px; margin: 0 auto; padding: 0 40px; }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); column-gap: 40px; row-gap: 70px; }

.product-card { display: flex; flex-direction: column; background: transparent;transition: var(--transition);}

/* 图片容器：增加艺术品画框感 */
.img-container { aspect-ratio: 1; overflow: hidden; background: var(--sino-grey);position: relative;box-shadow: 0 0 0 1px rgba(0,0,0,0.03);}

.img-container img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.5s cubic-bezier(0.165, 0.84, 0.44, 1);}

/* 悬停效果：轻微上浮与阴影 */
.product-card:hover .img-container {box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);}

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

/* 卡片信息 */
.card-link { text-decoration: none; color: inherit; display: block; flex-grow: 1; }

.card-info { padding: 25px 0 15px; text-align: center; }

.sku-tag { font-size: 12px; color: var(--sino-gold); margin-bottom: 10px;display: block;}

.card-info h3 { font-size: 20px; margin: 5px 0; font-weight: 600;line-height: 1.3;}

.zh-name { font-family: "Source Han Serif SC", serif;font-size: 15px; color: var(--text-muted); margin-bottom: 10px;}

.price { font-family: sans-serif;font-size: 16px; font-weight: 500; color: var(--sino-black);margin-top: 10px;}

/* 按钮优化：保持低调的高级感 */
.add-to-selection { width: 100%; padding: 10px; background: var(--sino-black); color: var(--sino-gold); border: 1px solid var(--sino-black);cursor: pointer; font-family: sans-serif;font-size: 14px; transition: var(--transition);}

.add-to-selection:hover { background: var(--sino-gold); color: #fff; border-color: var(--sino-gold);}

.add-to-selection:disabled { background: transparent; color: #ccc; border-color: #eee;cursor: not-allowed; }

/* --- 5. 加载按钮与页脚 --- */
.load-more-box { text-align: center; margin: 100px 0; }

#load-btn { background: transparent; border: 1px solid var(--sino-black); padding: 18px 60px; font-family: sans-serif;font-size: 12px; text-transform: uppercase; letter-spacing: 3px; cursor: pointer; transition: var(--transition);}

#load-btn:hover { background: var(--sino-black); color: #fff; }

.footer { padding: 80px 0; border-top: 1px solid #eee;font-family: sans-serif;font-size: 12px; color: #bbb; text-align: center; letter-spacing: 2px; line-height: 2;}

/* --- 6. 响应式布局 --- */
@media (max-width: 1024px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); column-gap: 30px; }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .tag-row { flex-direction: column; }
    .tag-label { margin-bottom: 10px; }
    .product-grid { grid-template-columns: 1fr; }
    .container { padding: 0 20px; }
}  
@keyframes bump {
    0% { transform: scale(1); }
    50% { transform: scale(1.5); color: #FFF;background:var(--sino-black); }
    100% { transform: scale(1); }
}
.count-bump {
    display: inline-block;
    animation: bump 0.3s ease-out;
}