:root{--bg:#f4f6fb;--panel:#fff;--text:#1d2433;--muted:#667085;--line:#dfe5f2;--blue:#2264ff;--blue-dark:#174bd4;--green:#12a46f;--red:#d92d20;--shadow:0 8px 24px rgba(28,43,78,.08)}*{box-sizing:border-box}body{margin:0;font-family:"Microsoft YaHei UI","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--bg)}a{color:var(--blue);text-decoration:none}button,.pay-button{border:0;border-radius:4px;background:var(--blue);color:#fff;padding:10px 18px;cursor:pointer;font-weight:600;display:inline-block}button:hover,.pay-button:hover{background:var(--blue-dark)}button:disabled{background:#a7b1c7;cursor:not-allowed}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:4px;padding:10px 12px;font:inherit;background:#fff}.topbar{height:60px;padding:0 28px;display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--line)}.brand{font-size:20px;font-weight:800;color:var(--blue)}.topbar nav{display:flex;gap:18px;font-size:14px}.page{width:min(1180px,calc(100% - 32px));margin:24px auto 60px}.narrow{width:min(760px,calc(100% - 32px))}.shop-shell{display:grid;grid-template-columns:260px 1fr;gap:18px}.shop-side{display:grid;gap:14px;align-content:start}.side-card,.list-head,.product-card,.panel{background:#fff;border:1px solid var(--line);border-radius:6px;box-shadow:var(--shadow)}.side-card{padding:18px}.side-card h2,.list-head h1{margin:0 0 12px;font-size:18px}.notice{border-top:4px solid var(--blue)}.notice p,.hint{color:var(--muted);line-height:1.8}.category{display:block;padding:12px;border:1px solid var(--line);border-radius:4px;margin-top:8px;color:var(--text);background:#f8faff}.category.active{color:#fff;background:var(--blue);border-color:var(--blue)}.side-query,.stack-form{display:grid;gap:10px}.shop-main{min-width:0}.list-head{padding:18px 20px;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between}.list-head h1{margin:0}.list-head span{color:var(--muted);font-size:14px}.products{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.product-card{min-height:280px;padding:22px;display:flex;flex-direction:column;justify-content:space-between}.product-card h2{margin:0 0 10px;font-size:20px}.product-card p{color:var(--muted);line-height:1.7}.product-bottom{border-top:1px solid var(--line);padding-top:16px}.price{color:var(--red);font-size:24px;font-weight:800}.stock{margin-left:10px;color:var(--muted);font-size:13px}.product-card form{margin-top:14px;display:grid;gap:10px}.panel{padding:24px;margin-bottom:18px}.panel h1{margin:0 0 18px;font-size:22px}.panel h2{font-size:18px;margin-top:24px}.error{color:var(--red)}.success{color:var(--green)}.card-code{background:#111827;color:#d1fae5;border-radius:6px;padding:18px;white-space:pre-wrap;cursor:pointer}.pay-box{border:1px solid var(--line);background:#f8faff;border-radius:6px;padding:16px;margin:16px 0}.countdown{font-size:18px;margin-bottom:12px}.countdown strong{color:var(--red);font-size:24px}.admin-page{width:min(1240px,calc(100% - 32px));margin:22px auto 60px}.admin-bg{min-height:100vh;display:grid;place-items:center}.login-box{width:min(420px,calc(100% - 32px));background:#fff;border:1px solid var(--line);border-radius:6px;padding:28px;box-shadow:var(--shadow)}.login-box h1{margin-top:0}.grid-form{display:grid;grid-template-columns:2fr 1fr 1fr 120px;gap:14px;align-items:end}.grid-form label{display:grid;gap:7px;color:var(--muted);font-size:14px}.grid-form .wide{grid-column:1/-1}.grid-form .check{display:flex;gap:8px;align-items:center;color:var(--text)}.grid-form .check input{width:auto}.data-table{width:100%;border-collapse:collapse;font-size:14px}.data-table th,.data-table td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left;vertical-align:top}.data-table th{background:#f8faff;color:var(--muted);font-weight:700}code{word-break:break-all}@media(max-width:900px){.shop-shell{grid-template-columns:1fr}.products{grid-template-columns:1fr}.grid-form{grid-template-columns:1fr}.topbar{height:auto;padding:16px;align-items:flex-start;gap:12px;flex-direction:column}.list-head{display:block}}