:root{--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #dbeafe;--success: #16a34a;--warning: #d97706;--danger: #dc2626;--bg: #f8fafc;--card: #ffffff;--text: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--radius: 12px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);--shadow-lg: 0 4px 24px rgba(0,0,0,.1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}#root{min-height:100vh}.page-layout{min-height:100vh;display:flex;flex-direction:column}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1200px;margin:0 auto;padding:0 clamp(24px,5vw,56px);width:100%}.page-content{max-width:1200px;margin:0 auto;padding:0 clamp(32px,6vw,80px);width:100%}.page-main{flex:1;width:100%}.page-title-block{padding:32px 0 8px;text-align:center}.page-title-block h1{font-size:1.75rem;margin-bottom:8px}.page-title-block p{color:var(--text-muted)}.header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow);padding:0 clamp(32px,6vw,80px)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;max-width:1400px;margin:0 auto;padding:14px 0}.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text);text-decoration:none;flex-shrink:0}.logo img{width:36px;height:36px;border-radius:8px;object-fit:cover}.header-search{display:flex;align-items:center;gap:8px;flex:1;min-width:180px;max-width:480px;margin:0 auto}.header-search input{flex:1;padding:9px 14px;border:1px solid var(--border);border-radius:8px;font-size:.875rem;background:var(--bg);min-width:0}.header-search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);background:var(--card)}.nav-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;flex-shrink:0;justify-content:flex-end}.nav-email{font-size:.85rem;color:var(--text-muted)}.nav-admin{opacity:.6}.token-badge{background:linear-gradient(135deg,#fef3c7,#fde68a);color:#92400e;padding:6px 14px;border-radius:20px;font-weight:600;font-size:.875rem}.msg-badge{position:relative;cursor:pointer}.msg-badge .dot{position:absolute;top:-4px;right:-4px;background:var(--danger);color:#fff;font-size:.65rem;min-width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 18px;border:none;border-radius:8px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;white-space:nowrap}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-outline:hover{background:var(--bg)}.btn-success{background:var(--success);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-warning{background:var(--warning);color:#fff}.btn-sm{padding:5px 12px;font-size:.8rem}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.product-section{width:100%}.product-grid{display:grid;width:100%;gap:clamp(12px,2vw,24px);padding:24px 0;grid-template-columns:1fr}@media(min-width:480px){.product-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:768px){.product-grid{grid-template-columns:repeat(3,1fr)}}@media(min-width:1100px){.product-grid{grid-template-columns:repeat(4,1fr)}}.product-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;cursor:pointer;text-decoration:none;color:inherit;display:flex;flex-direction:column;min-width:0}.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none}.product-card img{width:100%;height:200px;object-fit:cover;background:var(--bg)}.product-card .info{padding:16px}.product-card h3{font-size:1rem;margin-bottom:8px}.product-card .price{color:var(--danger);font-size:1.25rem;font-weight:700}.product-desc-preview{font-size:.8rem;color:var(--text-muted);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.placeholder-img{width:100%;height:200px;background:linear-gradient(135deg,#e2e8f0,#cbd5e1);display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:3rem}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;font-size:.875rem}.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:8px;font-size:.875rem;transition:border-color .2s}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.modal{background:var(--card);border-radius:var(--radius);padding:24px;width:100%;max-width:440px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.modal h2{margin-bottom:20px;font-size:1.25rem}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);padding:24px 16px}.auth-card{width:100%;max-width:420px;padding:32px 28px}.auth-card h2{text-align:center;margin-bottom:28px;font-size:1.35rem}.auth-card .form-group input{padding:12px 14px;font-size:.95rem}.auth-submit{width:100%;padding:12px 18px;font-size:1rem;margin-top:4px}.auth-footer-link{text-align:center;margin-top:16px;font-size:.875rem;color:var(--text-muted)}.footer{background:var(--card);border-top:1px solid var(--border);padding:24px 0;margin-top:auto;text-align:center;color:var(--text-muted);font-size:.875rem}.admin-layout{display:flex;min-height:100vh}.admin-sidebar{width:240px;background:#1e293b;color:#fff;padding:20px 0;flex-shrink:0}.admin-sidebar h2{padding:0 20px 20px;font-size:1.1rem;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:12px}.admin-nav a{display:block;padding:12px 20px;color:#ffffffb3;text-decoration:none;transition:all .2s;font-size:.9rem}.admin-nav a:hover,.admin-nav a.active{background:#ffffff1a;color:#fff;text-decoration:none}.admin-main{flex:1;padding:24px;overflow-x:auto}.admin-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.admin-header h1{font-size:1.5rem}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.875rem}table th,table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}table th{background:var(--bg);font-weight:600;white-space:nowrap}table tr:hover{background:#f1f5f9}.status-badge{display:inline-block;padding:3px 10px;border-radius:12px;font-size:.75rem;font-weight:600}.status-active{background:#dcfce7;color:#166534}.status-inactive{background:#fee2e2;color:#991b1b}.status-pending{background:#fef3c7;color:#92400e}.status-shipped{background:#dbeafe;color:#1e40af}.stock-badge{display:inline-block;padding:4px 12px;border-radius:12px;font-size:.8rem;font-weight:600}.stock-ok{background:#dcfce7;color:#166534}.stock-low{background:#fef3c7;color:#92400e}.stock-out{background:#fee2e2;color:#991b1b}.chat-widget{position:fixed;bottom:24px;right:24px;z-index:900}.chat-toggle{width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.5rem;cursor:pointer;box-shadow:var(--shadow-lg);transition:transform .2s}.chat-toggle:hover{transform:scale(1.05)}.chat-panel{position:absolute;bottom:70px;right:0;width:340px;max-height:420px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden}.chat-header{background:var(--primary);color:#fff;padding:14px 16px;font-weight:600}.chat-messages{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:8px;min-height:200px;max-height:280px}.chat-msg{padding:8px 12px;border-radius:12px;max-width:85%;font-size:.85rem;word-break:break-word}.chat-msg.buyer{background:var(--primary-light);align-self:flex-end}.chat-msg.admin{background:#f1f5f9;align-self:flex-start}.chat-msg .time{font-size:.7rem;color:var(--text-muted);margin-top:4px}.chat-input{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border)}.chat-input input{flex:1;padding:8px 12px;border:1px solid var(--border);border-radius:8px;font-size:.85rem}.alert{padding:10px 14px;border-radius:8px;margin-bottom:16px;font-size:.875rem}.alert-error{background:#fee2e2;color:#991b1b}.alert-success{background:#dcfce7;color:#166534}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.comment-list{margin-top:20px}.comment-item{padding:14px 0;border-bottom:1px solid var(--border)}.comment-item .meta{font-size:.8rem;color:var(--text-muted);margin-bottom:4px}.image-gallery{width:100%}.image-gallery-main{width:100%;border-radius:12px;max-height:360px;object-fit:cover;background:var(--bg)}.image-gallery-thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}.image-gallery-thumbs img{width:64px;height:64px;object-fit:cover;border-radius:8px;cursor:pointer;border:2px solid transparent;opacity:.7}.image-gallery-thumbs img.active{border-color:var(--primary);opacity:1}.notification-item{padding:14px;border-bottom:1px solid var(--border);cursor:pointer;transition:background .2s}.notification-item:hover{background:var(--bg)}.notification-item.unread{background:#eff6ff}.notification-item .email{font-weight:600;color:var(--primary)}.tabs{display:flex;gap:4px;margin-bottom:20px;border-bottom:1px solid var(--border);overflow-x:auto}.tabs button{padding:10px 20px;border:none;background:none;cursor:pointer;font-size:.9rem;color:var(--text-muted);border-bottom:2px solid transparent;white-space:nowrap}.tabs button.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}@media(max-width:768px){.admin-layout{flex-direction:column}.admin-sidebar{width:100%}.admin-nav{display:flex;overflow-x:auto}.admin-nav a{white-space:nowrap;padding:10px 16px}.chat-panel{width:calc(100vw - 32px);right:-8px}.header{padding:0 clamp(20px,5vw,32px)}.header-inner{display:grid;grid-template-columns:1fr auto;grid-template-areas:"logo nav" "search search";align-items:center}.logo{grid-area:logo}.nav-actions{grid-area:nav}.header-search{grid-area:search;max-width:none;width:100%;margin:0}.page-content{padding:0 clamp(20px,5vw,32px)}}