*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;background:#f5f5f5;color:#333;line-height:1.6}
.container{max-width:1400px;margin:0 auto;padding:0 20px}
a{text-decoration:none;color:inherit}

/* 头部导航 - PC端 */
.header{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.1);position:sticky;top:0;z-index:1000;padding:15px 0}
.header .container{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:15px}
.logo{display:flex;align-items:center;gap:10px}
.logo-icon{width:50px;height:50px;background:linear-gradient(135deg,#ff6b6b,#e74c3c);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;font-weight:bold}
.logo span{font-size:22px;font-weight:bold;background:linear-gradient(135deg,#e74c3c,#c0392b);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav{display:flex;gap:20px}
.nav-link{font-size:15px;color:#666;padding:10px 15px;border-radius:20px;transition:.3s}
.nav-link:hover,.nav-link.active{color:#e74c3c;background:#fff5f5}
.search-box{display:flex;background:#f5f5f5;border-radius:25px;overflow:hidden;border:2px solid transparent;transition:.3s}
.search-box:focus-within{border-color:#e74c3c;background:#fff}
.search-box input{border:none;padding:12px 20px;width:220px;background:transparent;outline:none;font-size:14px}
.search-box button{background:#e74c3c;border:none;padding:12px 20px;color:#fff;cursor:pointer;transition:.3s}
.search-box button:hover{background:#c0392b}

/* 分类标签 */
.categories{background:#fff;padding:15px 0;margin-bottom:15px;box-shadow:0 2px 5px rgba(0,0,0,.05)}
.category-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.tab{padding:10px 20px;border:none;background:#f5f5f5;border-radius:20px;cursor:pointer;font-size:14px;transition:.3s;color:#666}
.tab:hover{background:#ffe5e5;color:#e74c3c}
.tab.active{background:linear-gradient(135deg,#e74c3c,#c0392b);color:#fff}

/* 商品列表 */
.products{padding:15px 0}
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.product-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 15px rgba(0,0,0,.06);transition:.3s;cursor:pointer}
.product-card:hover{transform:translateY(-3px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.product-image{height:160px;background:linear-gradient(135deg,#ff8a65,#ff7043);display:flex;align-items:center;justify-content:center;color:#fff;font-size:48px}
.product-info{padding:15px}
.product-info .price{color:#e74c3c;font-size:13px;margin-bottom:5px;font-weight:500}
.product-info .price strong{font-size:22px}
.product-info .stock{color:#999;font-size:12px;margin-bottom:8px}
.product-info .name{font-size:14px;margin-bottom:12px;min-height:40px;color:#333;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.buy-btn{display:block;width:100%;padding:10px;background:linear-gradient(135deg,#e74c3c,#c0392b);color:#fff;text-align:center;border-radius:6px;font-size:14px;border:none;cursor:pointer;transition:.3s;font-weight:500}
.buy-btn:hover{opacity:.9;transform:scale(1.02)}

/* 页脚 */
.footer{background:#333;color:#fff;padding:20px 0;text-align:center;margin-top:30px}
.footer a{color:#e74c3c}

/* 移动端底部导航 */
.mobile-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:#fff;box-shadow:0 -2px 10px rgba(0,0,0,.1);z-index:1000;padding:8px 0;padding-bottom:calc(8px + env(safe-area-inset-bottom))}
.mobile-nav-items{display:flex;justify-content:space-around}
.mobile-nav-item{display:flex;flex-direction:column;align-items:center;text-decoration:none;color:#999;font-size:11px;padding:5px 15px;transition:.3s}
.mobile-nav-item.active{color:#e74c3c}
.mobile-nav-item span:first-child{font-size:22px;margin-bottom:3px}

/* ========== 移动端适配 ========== */
@media(max-width:768px){
    body{padding-bottom:0}
    .container{padding:0 12px}
    
    /* 头部精简 */
    .header{padding:8px 0;position:fixed;top:0;left:0;right:0}
    .header .container{flex-wrap:nowrap;gap:8px;padding:0 10px}
    .logo{flex-shrink:0}
    .logo-icon{width:28px;height:28px;font-size:11px;border-radius:6px}
    .logo span{font-size:14px}
    .nav{display:flex;gap:8px}
    .nav-link{padding:4px 8px;font-size:11px}
    .search-box{display:none}
    
    /* 分类标签 - 横向滚动更紧凑 */
    .categories{margin-top:44px;margin-bottom:6px;padding:6px 0}
    .category-tabs{flex-wrap:nowrap;justify-content:flex-start;gap:5px;overflow-x:auto;padding:0 8px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
    .category-tabs::-webkit-scrollbar{display:none}
    .tab{padding:4px 10px;font-size:11px;white-space:nowrap;flex-shrink:0;border-radius:10px}
    
    /* 商品列表 - 强制双列小卡片 */
    .products{padding:6px 0}
    .product-grid{display:grid!important;grid-template-columns:repeat(2,1fr)!important;gap:6px}
    .product-card{border-radius:6px}
    .product-image{height:90px;font-size:30px}
    .product-info{padding:6px}
    .product-info .price{font-size:10px}
    .product-info .price strong{font-size:14px}
    .product-info .stock{font-size:9px;margin-bottom:3px}
    .product-info .name{font-size:11px;min-height:28px;margin-bottom:5px;-webkit-line-clamp:2}
    .buy-btn{padding:5px;font-size:11px;border-radius:4px}
    
    /* 隐藏移动端底部导航 */
    .mobile-nav{display:none}
    
    /* 隐藏页脚 */
    .footer{display:none}
}

/* 小屏手机 */
@media(max-width:380px){
    .logo-icon{width:24px;height:24px;font-size:10px}
    .logo span{font-size:12px}
    .nav-link{padding:3px 6px;font-size:10px}
    .categories{margin-top:40px}
    .tab{padding:3px 8px;font-size:10px}
    .product-image{height:80px;font-size:26px}
    .product-info{padding:5px}
    .product-info .price strong{font-size:13px}
    .product-info .name{font-size:10px;min-height:24px}
    .buy-btn{padding:4px;font-size:10px}
}

/* ========== 订单查询页面 ========== */
.order-search-page{padding:40px 0;min-height:calc(100vh - 200px)}
.order-search-box{max-width:600px;margin:0 auto;background:#fff;border-radius:15px;padding:30px;box-shadow:0 5px 20px rgba(0,0,0,.08)}
.notice{background:#fff5f5;color:#e74c3c;padding:15px;border-radius:8px;margin-bottom:25px;text-align:center}
.search-tabs{display:flex;border-bottom:2px solid #e0e0e0;margin-bottom:25px}
.search-tab{flex:1;padding:15px;background:none;border:none;font-size:16px;cursor:pointer;color:#666;position:relative}
.search-tab.active{color:#e74c3c}
.search-tab.active::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:2px;background:#e74c3c}
.search-form{display:none}
.search-form.active{display:block}
.form-group{margin-bottom:20px}
.form-group label{display:block;margin-bottom:8px;font-weight:500;color:#333}
.form-group input,.form-group textarea{width:100%;padding:15px;border:2px solid #e0e0e0;border-radius:8px;font-size:15px;transition:.3s}
.form-group input:focus,.form-group textarea:focus{border-color:#e74c3c;outline:none}
.form-buttons{display:flex;gap:15px}
.btn-submit{flex:1;padding:15px;background:linear-gradient(135deg,#e74c3c,#c0392b);color:#fff;border:none;border-radius:8px;font-size:16px;cursor:pointer;transition:.3s}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 5px 15px rgba(231,76,60,.3)}
.btn-reset{padding:15px 30px;background:#f0f0f0;color:#666;border:none;border-radius:8px;cursor:pointer}
.search-results{margin-top:25px;padding-top:25px;border-top:1px solid #e0e0e0}

/* ========== 购买页面 ========== */
.buy-page{padding:40px 0;min-height:calc(100vh - 200px)}
.buy-box{max-width:800px;margin:0 auto;background:#fff;border-radius:15px;padding:30px;box-shadow:0 5px 20px rgba(0,0,0,.08)}
.product-header{margin-bottom:20px}
.product-title{font-size:22px;margin-bottom:10px;font-weight:600}
.product-tags{display:flex;gap:10px;flex-wrap:wrap}
.tag{padding:5px 12px;border-radius:15px;font-size:12px;background:#f5f5f5;color:#666}
.tag.stock-tag{background:#e8f5e9;color:#2e7d32}
.price-section{padding:20px 0;border-bottom:1px solid #f0f0f0;margin-bottom:20px}
.current-price{font-size:28px;font-weight:bold;color:#e74c3c}
.original-price{font-size:14px;color:#999;text-decoration:line-through;margin-left:10px}
.limit-info{font-size:12px;color:#ff9800;margin-left:10px}
.buy-form .form-group{margin-bottom:20px}
.required{color:#e74c3c}
.quantity-selector{display:flex;width:140px}
.quantity-selector button{width:40px;height:40px;border:1px solid #e0e0e0;background:#fff;font-size:18px;cursor:pointer;transition:.3s}
.quantity-selector button:hover{border-color:#e74c3c;color:#e74c3c}
.quantity-selector input{width:60px;height:40px;text-align:center;border:1px solid #e0e0e0;border-left:none;border-right:none;font-size:15px}
.payment-options{display:flex;gap:12px;flex-wrap:wrap}
.payment-option{flex:1;min-width:140px;padding:12px;border:2px solid #e0e0e0;border-radius:10px;cursor:pointer;transition:.3s}
.payment-option:hover{border-color:#e74c3c}
.payment-option.active{border-color:#e74c3c;background:#fff5f5}
.payment-option input{display:none}
.option-content{display:flex;align-items:center;gap:8px}
.option-icon{font-size:20px}
.option-name{font-size:13px}
.total-section{padding:18px;background:#fff5f5;border-radius:10px;margin:20px 0;display:flex;justify-content:space-between;align-items:center}
.total-label{font-size:15px;color:#666}
.total-price{font-size:26px;font-weight:bold;color:#e74c3c}
.submit-btn{width:100%;padding:16px;background:linear-gradient(135deg,#e74c3c,#c0392b);color:#fff;border:none;border-radius:10px;font-size:17px;cursor:pointer;transition:.3s;font-weight:500}
.submit-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(231,76,60,.4)}
.product-notice{margin-top:20px;padding:18px;background:#fffde7;border-radius:10px;border-left:4px solid #ffc107}
.product-notice p{font-size:13px;color:#666;margin-bottom:6px;line-height:1.7}
.tips-box{margin-top:15px;padding:18px;background:#e3f2fd;border-radius:10px}
.tips-box h5{color:#1976d2;margin-bottom:8px}
.tips-box p{font-size:13px;color:#666;margin-bottom:4px}

/* ========== 付款页面 ========== */
.payment-page{padding:40px 0;min-height:calc(100vh - 200px)}
.payment-box{max-width:650px;margin:0 auto;background:#fff;border-radius:15px;padding:25px;box-shadow:0 5px 20px rgba(0,0,0,.08)}
.payment-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:18px;border-bottom:2px solid #f0f0f0;margin-bottom:20px}
.payment-header h2{font-size:20px;color:#333}
.order-status{display:flex;align-items:center;gap:6px;font-size:13px;color:#ff9800}
.status-dot{width:8px;height:8px;border-radius:50%;background:#ff9800;animation:pulse 1.5s infinite}
.status-dot.pending{background:#ff9800}
.status-dot.paid{background:#4caf50}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.order-info{background:#f8f9fa;border-radius:10px;padding:18px;margin-bottom:20px}
.info-item{display:flex;align-items:center;padding:10px 0;border-bottom:1px solid #e9ecef}
.info-item:last-child{border-bottom:none}
.info-item .label{width:90px;color:#666;font-size:13px}
.info-item .value{flex:1;font-size:14px;font-weight:500}
.info-item .value.price{color:#e74c3c;font-size:18px;font-weight:bold}
.info-item.highlight{background:#fff5f5;margin:10px -18px -18px;padding:12px 18px;border-radius:0 0 10px 10px;border-bottom:none}
.copy-btn{padding:4px 10px;background:#e74c3c;color:#fff;border:none;border-radius:4px;font-size:11px;cursor:pointer;margin-left:8px}
.copy-btn:hover{background:#c0392b}
.payment-method{margin-bottom:20px}
.payment-method h3{font-size:16px;margin-bottom:15px;color:#333}
.usdt-info{background:#f0f7ff;border-radius:10px;padding:20px;border:2px solid #2196f3}
.usdt-amount{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:15px;padding-bottom:15px;border-bottom:1px dashed #90caf9}
.usdt-amount .label{color:#666;font-size:13px}
.usdt-amount .amount{font-size:28px;font-weight:bold;color:#1976d2}
.usdt-amount .unit{font-size:16px;color:#1976d2}
.qrcode-section{text-align:center;margin:15px 0}
.qrcode{width:180px;height:180px;margin:0 auto;background:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;border:2px solid #e0e0e0}
.qr-placeholder{text-align:center;color:#999}
.qr-placeholder span{font-size:40px}
.qr-placeholder p{font-size:11px;margin-top:8px}
.qr-tip{font-size:11px;color:#666;margin-top:8px}
.wallet-address{margin-top:15px}
.wallet-address .label{display:block;color:#666;font-size:13px;margin-bottom:6px}
.address-box{display:flex;align-items:center;background:#fff;padding:10px;border-radius:8px;border:1px solid #e0e0e0}
.address{flex:1;font-family:monospace;font-size:12px;word-break:break-all;color:#333}
.payment-notice{background:#fff3e0;border-radius:10px;padding:18px;margin-bottom:20px;border-left:4px solid #ff9800}
.payment-notice h4{color:#e65100;margin-bottom:12px;font-size:14px}
.payment-notice ul{list-style:none}
.payment-notice li{font-size:12px;color:#666;margin-bottom:8px;padding-left:18px;position:relative;line-height:1.6}
.payment-notice li::before{content:"⚠";position:absolute;left:0;color:#ff9800}
.payment-notice strong{color:#e74c3c}
.payment-notice a{color:#1976d2;text-decoration:underline}
.countdown-section{text-align:center;padding:12px;background:#ffebee;border-radius:10px;margin-bottom:15px}
.countdown{font-size:22px;font-weight:bold;color:#e74c3c}
.payment-actions{display:flex;gap:12px}
.btn-check{flex:2;padding:14px;background:linear-gradient(135deg,#4caf50,#388e3c);color:#fff;border:none;border-radius:10px;font-size:15px;cursor:pointer;transition:.3s}
.btn-check:hover{transform:translateY(-2px);box-shadow:0 5px 15px rgba(76,175,80,.4)}
.btn-cancel{flex:1;padding:14px;background:#f5f5f5;color:#666;border:none;border-radius:10px;font-size:15px;cursor:pointer}
.btn-cancel:hover{background:#e0e0e0}

/* ========== 移动端 - 其他页面适配 ========== */
@media(max-width:768px){
    /* 订单查询页 */
    .order-search-page{padding:70px 12px 20px}
    .order-search-box{padding:20px;border-radius:12px}
    .notice{padding:12px;font-size:13px;border-radius:6px}
    .search-tab{padding:12px 8px;font-size:14px}
    .form-group input,.form-group textarea{padding:14px;font-size:15px}
    .form-buttons{flex-direction:column}
    .btn-submit,.btn-reset{padding:14px;width:100%}
    
    /* 购买页 */
    .buy-page{padding:70px 12px 20px}
    .buy-box{padding:18px;border-radius:12px}
    .product-title{font-size:18px}
    .tag{padding:4px 10px;font-size:11px}
    .current-price{font-size:24px}
    .original-price{font-size:13px;display:block;margin:5px 0 0 0}
    .limit-info{display:block;margin:5px 0 0 0}
    .quantity-selector{width:120px}
    .quantity-selector button{width:36px;height:36px;font-size:16px}
    .quantity-selector input{height:36px;width:48px;font-size:14px}
    .payment-options{flex-direction:column}
    .payment-option{min-width:100%}
    .total-section{flex-direction:column;gap:8px;text-align:center}
    .total-price{font-size:22px}
    .submit-btn{padding:14px;font-size:16px}
    .product-notice,.tips-box{padding:14px}
    
    /* 付款页 */
    .payment-page{padding:70px 12px 20px}
    .payment-box{padding:18px;border-radius:12px}
    .payment-header{flex-direction:column;gap:8px;text-align:center}
    .payment-header h2{font-size:17px}
    .order-info{padding:14px}
    .info-item{flex-direction:column;align-items:flex-start;gap:4px;padding:8px 0}
    .info-item .label{width:auto;font-size:12px}
    .info-item .value{font-size:14px}
    .info-item .value.price{font-size:16px}
    .info-item.highlight{margin:10px -14px -14px;padding:10px 14px}
    .copy-btn{margin:6px 0 0 0}
    .payment-method h3{font-size:15px}
    .usdt-info{padding:15px}
    .usdt-amount{flex-direction:column;align-items:flex-start}
    .usdt-amount .amount{font-size:22px}
    .qrcode{width:160px;height:160px}
    .address-box{flex-direction:column;gap:8px;align-items:flex-start}
    .address{font-size:11px}
    .payment-notice{padding:14px}
    .payment-notice h4{font-size:13px}
    .payment-notice li{font-size:11px}
    .countdown{font-size:18px}
    .payment-actions{flex-direction:column}
    .btn-check,.btn-cancel{padding:13px;font-size:14px}
}