/* =============================================================
   B-Station — 收款站 前端样式
   设计方向：干净、专业、可信赖的电商风格
   不花哨、不暴露技术栈特征
   ============================================================= */

/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,sans-serif;font-size:16px;line-height:1.6;color:#1a1a2e;background:#fff;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:#2563eb;text-decoration:none}
a:hover{color:#1d4ed8}
ul,ol{padding-left:1.5em}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
h1{font-size:2rem;font-weight:700;margin-bottom:16px}
h2{font-size:1.5rem;font-weight:600;margin-bottom:12px}
h3{font-size:1.15rem;font-weight:600;margin-bottom:8px}

/* === Top Bar === */
.top-bar{background:#f8f9fa;font-size:.8rem;padding:8px 0;color:#555}
.top-bar .container{display:flex;justify-content:space-between}
.top-bar-right{display:flex;gap:16px}
.top-bar a{color:#555;font-size:.8rem}

/* === Header === */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid #eee}
.header-main{padding:12px 0}
.header-main .container{display:flex;align-items:center;gap:24px}
.logo{display:flex;align-items:center;gap:8px;flex-shrink:0;text-decoration:none}
.logo-text{font-size:1.25rem;font-weight:700;color:#1a1a2e}
.main-nav{display:flex;gap:20px}
.main-nav a{color:#444;font-size:.9rem;font-weight:500;padding:4px 0;border-bottom:2px solid transparent;transition:border-color .2s,color .2s}
.main-nav a:hover,.main-nav a.active{color:#2563eb;border-bottom-color:#2563eb}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-form{display:flex;gap:0}
.search-form input{padding:8px 12px;border:1px solid #ddd;border-radius:4px 0 0 4px;font-size:.85rem;width:160px}
.search-form button{padding:8px 12px;background:#f0f0f0;border:1px solid #ddd;border-left:0;border-radius:0 4px 4px 0;cursor:pointer;font-size:.85rem}
.cart-link{font-size:1.3rem;position:relative}
.cart-count{position:absolute;top:-8px;right:-10px;background:#e53e3e;color:#fff;font-size:.65rem;font-weight:700;padding:2px 6px;border-radius:10px;min-width:18px;text-align:center}

/* === Hero === */
.hero{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:80px 0;text-align:center}
.hero h1{font-size:3rem;margin-bottom:16px}
.hero p{font-size:1.2rem;opacity:.9;margin-bottom:24px;max-width:500px;margin-left:auto;margin-right:auto}

/* === Buttons === */
.btn{display:inline-block;padding:12px 24px;border-radius:6px;font-weight:600;font-size:.95rem;cursor:pointer;border:2px solid transparent;text-align:center;transition:all .2s;text-decoration:none}
.btn-primary{background:#2563eb;color:#fff;border-color:#2563eb}
.btn-primary:hover{background:#1d4ed8;color:#fff}
.btn-outline{background:transparent;color:#2563eb;border-color:#2563eb}
.btn-outline:hover{background:#2563eb;color:#fff}
.btn-sm{padding:8px 16px;font-size:.85rem}
.btn-lg{padding:14px 28px;font-size:1.05rem}
.btn-block{display:block;width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}
.hero .btn-primary{background:#fff;color:#667eea;border-color:#fff}
.hero .btn-outline{color:#fff;border-color:rgba(255,255,255,.6)}
.hero .btn-outline:hover{background:#fff;color:#667eea}

/* === Product Grid === */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.product-card{border:1px solid #eee;border-radius:10px;overflow:hidden;transition:box-shadow .2s,transform .2s;background:#fff}
.product-card:hover{box-shadow:0 8px 30px rgba(0,0,0,.1);transform:translateY(-2px)}
.product-image-link{display:block}
.product-image{padding-top:100%;background:#f5f5f5 center/cover no-repeat;position:relative}
.product-info{padding:16px}
.product-category{font-size:.75rem;color:#888;text-transform:uppercase;letter-spacing:.5px}
.product-info h3{font-size:1rem;margin:4px 0 8px}
.product-info h3 a{color:#1a1a2e}
.product-info h3 a:hover{color:#2563eb}
.product-price{margin-bottom:12px}
.price-current{font-size:1.15rem;font-weight:700;color:#1a1a2e}
.price-original{font-size:.85rem;color:#999;text-decoration:line-through;margin-left:8px}
.badge{position:absolute;top:10px;left:10px;padding:4px 10px;border-radius:4px;font-size:.7rem;font-weight:700;text-transform:uppercase;color:#fff}
.badge-sale{background:#e53e3e}

/* === Category Grid === */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:20px}
.category-card{text-align:center;text-decoration:none;color:#1a1a2e;transition:transform .2s}
.category-card:hover{transform:translateY(-4px)}
.category-image{padding-top:70%;background:#f0f0f0 center/cover no-repeat;border-radius:10px;margin-bottom:10px}

/* === Features === */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.feature{text-align:center;padding:20px}
.feature-icon{font-size:2.2rem;margin-bottom:8px;display:block}

/* === Product Detail === */
.breadcrumb{font-size:.85rem;color:#888;margin-bottom:20px}
.product-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.product-image-large{padding-top:100%;background:#f5f5f5 center/cover no-repeat;border-radius:10px}
.product-detail-price{margin:16px 0}
.product-detail-price .price-current{font-size:1.8rem}
.product-detail-price .badge{margin-left:12px;position:static;display:inline-block;vertical-align:middle}
.product-description{color:#555;margin:16px 0 20px;line-height:1.7}
.product-meta{font-size:.85rem;color:#666;margin-bottom:20px;display:flex;flex-direction:column;gap:4px}
.in-stock{color:#16a34a;font-weight:600}
.out-of-stock{color:#e53e3e;font-weight:600}
.quantity-selector{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.quantity-selector input{width:70px;padding:8px;border:1px solid #ddd;border-radius:4px;text-align:center;font-size:1rem}
.add-to-cart-form .btn-lg{padding:14px 40px}
.product-detail-trust{margin-top:24px;padding:16px;background:#f8f9fa;border-radius:8px;font-size:.85rem;color:#555}
.product-detail-trust p{margin:4px 0}

/* === Cart === */
.cart-layout{display:grid;grid-template-columns:1fr 360px;gap:32px}
.cart-item{display:grid;grid-template-columns:80px 1fr 80px 80px 30px;gap:16px;align-items:center;padding:16px 0;border-bottom:1px solid #eee}
.cart-item-image{padding-top:100%;background:#f5f5f5 center/cover no-repeat;border-radius:6px}
.cart-item-info h3{font-size:.95rem}
.cart-item-price{font-size:.85rem;color:#888}
.cart-item-quantity input{width:60px;padding:6px;border:1px solid #ddd;border-radius:4px;text-align:center}
.cart-item-subtotal{font-weight:700;text-align:right}
.cart-item-remove button{background:none;border:none;color:#999;cursor:pointer;font-size:1.1rem}
.cart-item-remove button:hover{color:#e53e3e}
.cart-summary{background:#f8f9fa;padding:24px;border-radius:10px;height:fit-content;position:sticky;top:80px}
.cart-summary h2{font-size:1.2rem;margin-bottom:16px}
.summary-row{display:flex;justify-content:space-between;padding:8px 0;font-size:.95rem;border-bottom:1px solid #eee}
.summary-total{border-bottom:none;font-weight:700;font-size:1.15rem;padding-top:12px}
.empty-state{text-align:center;padding:60px 20px}
.empty-state p{font-size:1.2rem;color:#888;margin-bottom:20px}

/* === Checkout === */
.checkout-layout{display:grid;grid-template-columns:1fr 380px;gap:32px}
.checkout-form-area h2{margin-bottom:16px}
.checkout-sidebar h2{margin-bottom:16px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-weight:600;font-size:.85rem;margin-bottom:4px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:6px;font-size:.95rem;font-family:inherit;transition:border-color .2s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:#2563eb;outline:none;box-shadow:0 0 0 3px rgba(37,99,235,.1)}

/* Payment Tabs */
.payment-methods-tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.payment-tab{padding:10px 16px;border:2px solid #ddd;border-radius:8px;background:#fff;cursor:pointer;font-size:.9rem;font-weight:600;transition:all .2s}
.payment-tab:hover{border-color:#2563eb}
.payment-tab.active{background:#2563eb;color:#fff;border-color:#2563eb}
.payment-panel{display:none;padding:20px 0}
.payment-panel.active{display:block}
.payment-error{color:#e53e3e;font-size:.85rem;margin-top:8px;min-height:20px}
.payment-secure-note{font-size:.8rem;color:#888;margin-top:12px;text-align:center}

/* Stripe Elements */
#card-element{padding:14px;border:1px solid #ddd;border-radius:6px;margin-bottom:16px;background:#fff}
#card-element.StripeElement--focus{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
#payment-request-button{margin:20px 0}

/* Order Items (sidebar) */
.order-items{margin-bottom:20px}
.order-item{display:grid;grid-template-columns:50px 1fr auto;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid #f0f0f0}
.order-item:last-child{border:none}
.order-item-image{padding-top:100%;background:#f5f5f5 center/cover no-repeat;border-radius:4px}
.order-item-info{display:flex;flex-direction:column}
.order-item-name{font-size:.85rem;font-weight:500}
.order-item-qty{font-size:.75rem;color:#888}
.order-item-price{font-weight:600;font-size:.9rem}

/* === Order Complete === */
.order-complete-box{max-width:550px;margin:0 auto;text-align:center;padding:40px}
.order-complete-icon{font-size:3rem;margin-bottom:16px}
.order-complete-box h1{font-size:1.8rem;margin-bottom:8px}
.order-details{background:#f8f9fa;padding:20px;border-radius:8px;margin:24px 0;text-align:left}
.order-detail-row{display:flex;justify-content:space-between;padding:8px 0;font-size:.95rem;border-bottom:1px solid #eee}
.order-detail-row:last-child{border:none}
.status-paid{color:#16a34a}
.status-pending{color:#d97706}
.status-failed{color:#e53e3e}
.order-complete-note{color:#555;margin-bottom:24px}
.order-complete-actions{display:flex;gap:12px;justify-content:center}

/* === Order Lookup === */
.lookup-form{max-width:450px;margin:20px auto 40px}
.order-result{margin-top:30px}

/* === Static Pages === */
.static-page{min-height:60vh}
.static-page h1{margin-bottom:20px}
.static-page h2{margin:24px 0 12px}
.static-page p,.static-page li{margin-bottom:12px;color:#444;line-height:1.7}
.info-table{width:100%;border-collapse:collapse;margin:16px 0}
.info-table th,.info-table td{padding:12px;border:1px solid #eee;text-align:left;font-size:.9rem}
.info-table th{background:#f8f9fa;font-weight:600}

/* FAQ */
.faq-list{max-width:700px}
.faq-item{margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid #eee}
.faq-item:last-child{border-bottom:none}
.faq-item h3{color:#2563eb;margin-bottom:8px}

/* === Alert === */
.alert{padding:12px 16px;border-radius:6px;margin-bottom:16px;font-size:.9rem}
.alert-success{background:#dcfce7;color:#16a34a;border:1px solid #bbf7d0}
.alert-error{background:#fee2e2;color:#e53e3e;border:1px solid #fecaca}

/* === Pagination === */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:40px}
.pagination a{padding:8px 14px;border:1px solid #ddd;border-radius:4px;font-size:.9rem;color:#555}
.pagination a:hover{background:#f0f0f0}
.pagination a.active{background:#2563eb;color:#fff;border-color:#2563eb}

/* === Products Header === */
.products-header{margin-bottom:32px}
.products-toolbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-top:16px}
.category-filter{display:flex;gap:8px;flex-wrap:wrap}
.category-filter a{padding:6px 14px;border:1px solid #ddd;border-radius:20px;font-size:.8rem;color:#555;transition:all .2s}
.category-filter a:hover,.category-filter a.active{background:#2563eb;color:#fff;border-color:#2563eb}
.sort-filter select{padding:8px 12px;border:1px solid #ddd;border-radius:6px;font-size:.85rem;background:#fff}

/* === Footer === */
.site-footer{background:#1a1a2e;color:#ccc;padding:48px 0 24px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:32px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:12px}
.footer-col a{display:block;color:#aaa;font-size:.85rem;padding:4px 0;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:.85rem;margin-bottom:8px}
.subscribe-form{display:flex;gap:0}
.subscribe-form input{padding:10px;border:1px solid #444;border-radius:4px 0 0 4px;background:#2a2a3e;color:#fff;font-size:.85rem;flex:1;min-width:0}
.subscribe-form button{padding:10px 16px;background:#2563eb;border:none;border-radius:0 4px 4px 0;color:#fff;font-weight:600;cursor:pointer;font-size:.85rem;white-space:nowrap}
.subscribe-form button:hover{background:#1d4ed8}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid #2a2a3e;font-size:.8rem;color:#888}
.payment-icons{font-size:1.5rem;margin-bottom:10px;display:flex;gap:8px;justify-content:center}

/* === Related Products === */
.related-products h2{margin-bottom:20px}

/* === Responsive === */
@media (max-width:768px){
  .main-nav{display:none}
  .search-form input{width:100px}
  .hero h1{font-size:2rem}
  .hero{padding:50px 0}
  .product-detail-grid{grid-template-columns:1fr;gap:24px}
  .cart-layout{grid-template-columns:1fr}
  .cart-item{grid-template-columns:60px 1fr 60px 60px 20px;gap:8px;font-size:.85rem}
  .checkout-layout{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .header-main .container{gap:12px}
  .product-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}
}

/* === Coming Soon Payment Tabs === */
.payment-tab.coming-soon{opacity:.5;cursor:not-allowed;border-style:dashed}
.payment-tab.coming-soon small{font-size:.7rem;color:#999}
.coming-soon-banner{text-align:center;padding:40px 20px;background:#f8f9fa;border-radius:8px;border:2px dashed #ddd}
.coming-soon-banner h3{color:#555;margin-bottom:8px}
.coming-soon-banner p{color:#888;font-size:.9rem}
.coming-soon-banner .hint{font-size:.8rem;color:#aaa;margin-top:4px}
.paypal-badge{text-align:center;padding:10px;background:#e8f5e9;color:#2e7d32;border-radius:6px;margin-bottom:16px;font-weight:600;font-size:.9rem}

@media (max-width:480px){
  .product-grid{grid-template-columns:1fr 1fr;gap:12px}
  .product-info{padding:10px}
  .product-info h3{font-size:.85rem}
}

/* Mobile menu */
.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;padding:2px 8px;color:#333}
@media (max-width:768px){
  .mobile-menu-btn{display:block}
  .main-nav.show{display:flex !important;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:2px solid #eee;padding:12px 20px;z-index:99;box-shadow:0 8px 20px rgba(0,0,0,.1)}
  .main-nav.show a{padding:10px 0;border-bottom:1px solid #f0f0f0;border-bottom:none}
}