/* ========== Reset & Base ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:#f5f6f8;color:#333;line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
button,input{border:none;outline:none;font-family:inherit}
ul{list-style:none}

/* ========== Header ========== */
.header{background:#fff;position:sticky;top:0;z-index:100;padding:0 16px;height:52px;display:flex;align-items:center;gap:12px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.logo{display:flex;align-items:center;gap:6px;flex-shrink:0}
.logo-icon{font-size:22px}
.logo-text{font-size:17px;font-weight:700;color:#e74c3c}
.search-bar{flex:1;display:flex;align-items:center;background:#f2f3f5;border-radius:20px;padding:0 6px 0 14px;height:36px}
.search-bar input{flex:1;background:transparent;font-size:14px;color:#333;min-width:0}
.search-bar input::placeholder{color:#999}
.search-bar button{width:32px;height:32px;border-radius:50%;background:#e74c3c;color:#fff;font-size:16px;cursor:pointer;flex-shrink:0;display:flex;align-items:center;justify-content:center}

/* ========== Main ========== */
.main{max-width:1200px;margin:0 auto;padding:12px}

/* ========== Banner ========== */
.banner-wrap{margin-bottom:16px}
.banner-swiper{position:relative;border-radius:12px;overflow:hidden}
.banner-item{display:block;width:100%;height:0;padding-bottom:40%;position:relative;overflow:hidden;border-radius:12px}
.banner-item img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
.banner-placeholder{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;font-weight:600;text-shadow:0 2px 4px rgba(0,0,0,.3)}
.banner-dots{display:flex;justify-content:center;gap:6px;margin-top:8px}
.banner-dot{width:6px;height:6px;border-radius:50%;background:#ccc;transition:.3s}
.banner-dot.active{background:#e74c3c;width:18px;border-radius:3px}

/* ========== Category Grid ========== */
.section-title{font-size:17px;font-weight:700;color:#333;margin-bottom:12px;display:flex;align-items:center;gap:6px}
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:20px}
.cat-item{text-align:center;padding:14px 4px;border-radius:12px;cursor:pointer;transition:transform .15s}
.cat-item:hover{transform:translateY(-2px)}
.cat-item .cat-icon{font-size:28px;margin-bottom:6px;display:block}
.cat-item .cat-name{font-size:12px;font-weight:500}

/* ========== Product Cards ========== */
.goods-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.goods-card{background:#fff;border-radius:12px;overflow:hidden;position:relative;cursor:pointer;transition:transform .15s,box-shadow .15s}
.goods-card:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(0,0,0,.08)}
.goods-card .img-wrap{position:relative;width:100%;height:0;padding-bottom:100%;overflow:hidden;background:#f8f8f8}
.goods-card .img-wrap img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover}
.goods-card .img-fallback{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:40px;color:#fff}
.goods-card .platform-badge{position:absolute;top:6px;left:6px;padding:2px 8px;border-radius:6px;font-size:10px;color:#fff;font-weight:500}
.platform-taobao{background:#ff5000}
.platform-jd{background:#e2231a}
.platform-pdd{background:#e4393c}
.goods-card .info{padding:10px}
.goods-card .title{font-size:13px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;color:#333;margin-bottom:8px}
.goods-card .price-row{display:flex;align-items:baseline;gap:6px}
.goods-card .price{font-size:18px;font-weight:700;color:#e74c3c}
.goods-card .orig-price{font-size:11px;color:#999;text-decoration:line-through}
.goods-card .coupon-tag{display:inline-block;padding:1px 6px;border-radius:4px;font-size:10px;color:#e74c3c;background:#fff0f0;border:1px solid #ffccc7;margin-left:6px}
.goods-card .sales{font-size:11px;color:#999;margin-top:4px}
.goods-card .shop{font-size:11px;color:#999;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ========== Pagination ========== */
.pagination{display:flex;justify-content:center;align-items:center;gap:8px;padding:20px 0;font-size:14px}
.pagination a{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;border-radius:8px;background:#fff;color:#333;border:1px solid #e8e8e8;padding:0 10px;font-size:13px}
.pagination a:hover{background:#e74c3c;color:#fff;border-color:#e74c3c}
.pagination span{color:#999}

/* ========== Detail Page ========== */
.detail-wrap{max-width:768px;margin:0 auto}
.detail-images{position:relative;border-radius:12px;overflow:hidden;margin-bottom:16px;background:#f8f8f8}
.detail-images img{width:100%}
.detail-images .img-fallback{display:flex;align-items:center;justify-content:center;height:300px;font-size:60px;color:#fff}
.detail-info{background:#fff;border-radius:12px;padding:16px;margin-bottom:12px}
.detail-info .d-title{font-size:16px;font-weight:600;line-height:1.6;color:#222;margin-bottom:12px}
.detail-info .d-price-row{display:flex;align-items:baseline;gap:10px;margin-bottom:8px}
.detail-info .d-price{font-size:28px;font-weight:700;color:#e74c3c}
.detail-info .d-orig-price{font-size:13px;color:#999;text-decoration:line-through}
.detail-info .d-save{font-size:12px;color:#e74c3c;margin-bottom:12px}
.detail-info .d-meta{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:#999;padding-top:12px;border-top:1px solid #f0f0f0}
.detail-actions{position:sticky;bottom:0;background:#fff;padding:12px 16px;box-shadow:0 -2px 8px rgba(0,0,0,.06);display:flex;gap:10px;border-radius:12px 12px 0 0}
.detail-actions button{flex:1;padding:12px;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer}
.btn-buy{background:linear-gradient(135deg,#e74c3c,#c0392b);color:#fff}
.btn-copy{background:#fff;border:1px solid #ddd!important;color:#333}
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#333;color:#fff;padding:10px 24px;border-radius:8px;font-size:14px;z-index:999;opacity:0;transition:opacity .3s;pointer-events:none}
.toast.show{opacity:1}

/* ========== Footer ========== */
.footer{text-align:center;padding:20px;font-size:12px;color:#bbb}

/* ========== Search Results ========== */
.result-header{background:#fff;border-radius:12px;padding:12px 16px;margin-bottom:12px;font-size:13px;color:#666}
.result-header strong{color:#e74c3c}

/* ========== Responsive ========== */
@media (min-width:768px){
  .goods-grid{grid-template-columns:repeat(3,1fr);gap:16px}
  .cat-grid{grid-template-columns:repeat(6,1fr);gap:10px}
  .cat-item .cat-name{font-size:14px}
  .header{padding:0 24px}
  .main{padding:16px 24px}
  .banner-item{padding-bottom:30%}
}
@media (min-width:1024px){
  .goods-grid{grid-template-columns:repeat(4,1fr);gap:20px}
  .cat-grid{grid-template-columns:repeat(6,1fr)}
  .detail-wrap{display:flex;gap:20px}
  .detail-images{flex:0 0 400px;position:sticky;top:68px;align-self:flex-start}
  .detail-right{flex:1}
}
@media (min-width:1400px){
  .goods-grid{grid-template-columns:repeat(5,1fr)}
}
/* ========== Tab Bar ========== */
.tab-bar{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid #f0f0f0;padding:6px 0 env(safe-area-inset-bottom);z-index:99}
.tab-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;font-size:11px;color:#999;text-decoration:none}
.tab-item.active{color:#e74c3c}
.tab-icon{font-size:20px}
.tab-label{font-size:10px}
.main{padding-bottom:70px}
@media (min-width:768px){
  .tab-bar{position:static;border-top:none;border-bottom:1px solid #f0f0f0;margin-bottom:16px;padding:8px 0;border-radius:0}
  .tab-item{flex-direction:row;justify-content:center;gap:6px;font-size:14px;padding:8px 16px}
  .tab-label{font-size:13px}
  .tab-icon{font-size:18px}
  .main{padding-bottom:12px}
}