@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap");

:root {
  --ink: #17354a;
  --muted: #7890a0;
  --line: #cfe1e8;
  --paper: #f4fbfc;
  --panel: rgba(255, 255, 255, .92);
  --teal: #0aa7c1;
  --teal-soft: #e1f7fa;
  --green: #36b779;
  --mono: "DM Mono", Consolas, monospace;
  --sans: "DM Sans", "Microsoft YaHei", "PingFang SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
body::before { position: fixed; inset: 0; z-index: -1; pointer-events: none; content: ""; background: radial-gradient(circle at 100% 0, rgba(84, 210, 224, .22), transparent 32%), radial-gradient(circle at 0 100%, rgba(130, 164, 242, .12), transparent 30%); }
body.modal-open { overflow: hidden; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }

.app-shell { width: min(1220px, calc(100% - 40px)); min-height: 100vh; margin: 0 auto; }
.topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; min-height: 76px; gap: 28px; background: rgba(244, 251, 252, .9); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: 10px; margin-right: auto; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; color: var(--ink); background: var(--teal); font-weight: 700; transform: rotate(-8deg); }
.brand > span:last-child { display: grid; gap: 1px; }.brand strong { font-size: 17px; letter-spacing: .12em; }.brand small { color: var(--muted); font: 9px var(--mono); letter-spacing: .06em; }
.topnav { display: flex; align-items: center; gap: 22px; }.topnav a, .topnav button { position: relative; padding: 8px 0; color: var(--muted); border: 0; background: transparent; font-size: 13px; }.topnav a::after, .topnav button::after { position: absolute; right: 0; bottom: 0; left: 0; height: 2px; content: ""; background: transparent; }.topnav a.active, .topnav a:hover, .topnav button:hover { color: var(--ink); }.topnav a.active::after { background: var(--teal); }
.connection-state { color: var(--muted); font: 10px var(--mono); letter-spacing: .04em; white-space: nowrap; }.connection-state i { display: inline-block; width: 7px; height: 7px; margin-right: 5px; border-radius: 50%; background: #d6a738; }.connection-state.online i { background: var(--green); box-shadow: 0 0 0 4px rgba(54, 183, 121, .14); }

.catalog-layout { display: grid; grid-template-columns: 206px minmax(0, 1fr); gap: 24px; padding: 28px 0 54px; }
.category-panel { align-self: start; padding: 18px; background: var(--panel); border: 1px solid var(--line); border-radius: 15px; box-shadow: 0 12px 30px rgba(37, 94, 117, .07); }.panel-title { display: flex; align-items: center; gap: 9px; margin: 0 0 16px; font-size: 16px; font-weight: 700; }.panel-title span { width: 5px; height: 22px; border-radius: 8px; background: linear-gradient(var(--teal), #ffd35e); }.category-row { display: grid; gap: 6px; }.category-button { width: 100%; padding: 11px 12px; color: var(--ink); border: 1px solid transparent; border-radius: 10px; background: transparent; text-align: left; font-size: 13px; }.category-button:hover { background: var(--teal-soft); }.category-button.active { color: #fff; background: var(--teal); box-shadow: 0 5px 12px rgba(10, 167, 193, .18); }.category-note { margin: 18px 0 0; color: var(--muted); font: 10px/1.6 var(--mono); }
.catalog-content { min-width: 0; }.catalog-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 20px; }.eyebrow { margin: 0 0 8px; color: var(--teal); font: 10px var(--mono); letter-spacing: .08em; }.catalog-toolbar h1 { margin: 0; font-size: clamp(30px, 4vw, 42px); line-height: 1; letter-spacing: -.05em; }.catalog-summary { display: flex; gap: 8px; margin: 11px 0 0; color: var(--muted); font: 10px var(--mono); }.catalog-summary b { color: var(--teal); }.search-box { display: flex; align-items: center; gap: 8px; width: min(330px, 45%); min-height: 42px; padding: 0 13px; background: #fff; border: 1px solid var(--line); border-radius: 10px; }.search-box span { color: var(--teal); font-size: 23px; line-height: 1; }.search-box input { width: 100%; min-width: 0; color: var(--ink); border: 0; outline: 0; background: transparent; font-size: 13px; }.search-box:focus-within { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(10, 167, 193, .12); }

.product-list { display: grid; gap: 11px; }.product-row { display: grid; grid-template-columns: 78px minmax(0, 1fr) auto 112px; align-items: center; gap: 16px; min-height: 102px; padding: 14px 16px; background: var(--panel); border: 1px solid var(--line); border-left: 4px solid #f5d45c; border-radius: 13px; box-shadow: 0 8px 20px rgba(37, 94, 117, .05); transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease; }.product-row:hover { border-color: #8ed8e4; border-left-color: var(--teal); transform: translateY(-2px); box-shadow: 0 12px 24px rgba(37, 94, 117, .1); }
.product-thumb { display: grid; place-items: center; width: 68px; height: 68px; overflow: hidden; background: #fff; border: 1px solid #cfdae0; border-radius: 10px; }.product-thumb img { display: block; width: 64px; height: 64px; object-fit: contain; }.product-thumb.placeholder { color: var(--ink); background: linear-gradient(135deg, #e1f7fa, #fff); font-weight: 700; }
.product-info { min-width: 0; }.product-heading { display: flex; align-items: baseline; gap: 9px; min-width: 0; }.product-category { flex: 0 0 auto; color: var(--muted); font: 10px var(--mono); text-transform: none; }.product-heading h2 { min-width: 0; margin: 0; overflow: hidden; font-size: 16px; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }.product-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }.product-badges span { padding: 4px 8px; color: #34819a; background: #e8f8fb; border: 1px solid #bce6ed; border-radius: 20px; font: 10px var(--mono); }.product-badges .stock-ready { color: var(--green); background: #effbf4; border-color: #c6edd7; }.product-badges .stock-low { color: #b17b18; background: #fff8e8; border-color: #f2dda2; }.product-badges .stock-empty { color: #a47179; background: #fff2f3; border-color: #f0c8ce; }
.product-price { display: grid; justify-items: end; gap: 3px; white-space: nowrap; }.product-price strong { font: 500 18px var(--mono); }.product-price small { color: var(--muted); font: 10px var(--mono); }.buy-button { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 38px; color: #fff; border: 0; border-radius: 9px; background: var(--teal); font-size: 12px; }.buy-button:hover { background: #07889e; }.buy-button span { font-size: 15px; }.empty-state { padding: 50px 20px; color: var(--muted); border: 1px dashed var(--line); border-radius: 12px; text-align: center; }

.purchase-layer[hidden], .lookup-layer[hidden] { display: none; }.purchase-layer, .lookup-layer { position: fixed; inset: 0; z-index: 30; }.purchase-backdrop { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: rgba(23, 53, 74, .22); backdrop-filter: blur(3px); }.purchase-panel, .lookup-panel { position: absolute; top: 0; right: 0; width: min(560px, 100%); height: 100%; padding: 30px 34px 40px; overflow: auto; background: #fff; box-shadow: -16px 0 45px rgba(23, 53, 74, .16); }.lookup-panel { width: min(500px, 100%); }.panel-head { display: flex; align-items: start; justify-content: space-between; padding-bottom: 20px; border-bottom: 1px solid var(--line); }.panel-head h2 { margin: 0; font-size: 32px; letter-spacing: -.05em; }.close-panel { width: 34px; height: 34px; color: var(--ink); border: 1px solid var(--line); border-radius: 8px; background: #fff; font-size: 24px; line-height: 1; }.close-panel:hover { color: var(--teal); border-color: var(--teal); }
.purchase-product { display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 18px; padding: 24px 0; border-bottom: 1px solid var(--line); }.purchase-thumb { display: grid; place-items: center; width: 112px; height: 112px; background: #f0f8fa; border: 1px solid var(--line); border-radius: 12px; }.purchase-thumb img { width: 100px; height: 100px; object-fit: contain; }.purchase-thumb .image-placeholder { display: grid; place-items: center; width: 100px; height: 100px; color: var(--ink); background: var(--teal-soft); font-size: 26px; font-weight: 700; }.image-placeholder[hidden] { display: none !important; }.product-code { color: var(--muted); font: 10px var(--mono); }.purchase-product h3 { margin: 9px 0 9px; font-size: 21px; line-height: 1.2; }.purchase-product p { margin: 0 0 17px; color: var(--muted); font-size: 12px; line-height: 1.6; }.purchase-price-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }.purchase-price-row strong { font: 19px var(--mono); }.purchase-price-row span { color: var(--green); font: 10px var(--mono); }
.image-placeholder[hidden] { display: none !important; }
.wallet-strip { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 20px 0; padding: 14px 16px; background: var(--teal-soft); border: 1px solid #bde8ee; border-radius: 10px; }.wallet-strip div { display: grid; gap: 4px; }.wallet-strip span, .wallet-strip small { color: var(--muted); font-size: 11px; }.wallet-strip strong { font: 18px var(--mono); }.wallet-strip small { font-family: var(--mono); }.text-button { padding: 0; color: var(--ink); border: 0; border-bottom: 1px solid var(--teal); background: transparent; font-size: 12px; white-space: nowrap; }.text-button:hover { color: var(--teal); }
.purchase-fields { display: grid; gap: 8px; }.purchase-fields label, .lookup-form > label { color: var(--muted); font: 10px var(--mono); letter-spacing: .05em; }.purchase-fields label small { color: #a5b4bd; letter-spacing: 0; }.purchase-fields input, .lookup-row input { min-height: 42px; padding: 0 11px; color: var(--ink); border: 1px solid var(--line); border-radius: 8px; outline: 0; background: #fff; font-size: 14px; }.purchase-fields input:focus, .lookup-row input:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(10, 167, 193, .12); }.order-no-row { display: flex; align-items: center; gap: 12px; }.order-no-row input { flex: 1; min-width: 0; color: var(--muted); background: #f6fafb; font: 11px var(--mono); }
.payment-note { display: flex; gap: 11px; align-items: center; margin: 20px 0 13px; padding: 12px 0; border-block: 1px solid var(--line); }.payment-note > span { display: grid; place-items: center; width: 28px; height: 28px; color: #fff; background: var(--ink); border-radius: 7px; font: 700 14px var(--mono); }.payment-note strong { font-size: 13px; }.payment-note p { margin: 3px 0 0; color: var(--muted); font-size: 11px; }.purchase-message, .lookup-message { min-height: 20px; margin: 0 0 10px; color: var(--muted); font-size: 12px; line-height: 1.5; }.purchase-message.loading { color: #7a62c7; }.purchase-message.success { color: var(--green); }.purchase-message.error { color: #c65a67; }.checkout-button, .lookup-row button { width: 100%; min-height: 46px; color: #fff; border: 0; border-radius: 9px; background: var(--teal); font-size: 13px; }.checkout-button:hover, .lookup-row button:hover { background: #07889e; }.checkout-button:disabled { opacity: .55; cursor: wait; }
.order-result, .lookup-result { margin-top: 20px; padding: 16px; border: 1px solid #bfe8d2; border-radius: 10px; background: #f4fcf7; }.result-head { display: flex; justify-content: space-between; gap: 10px; }.result-head strong { font-size: 14px; }.result-head span { color: var(--muted); font-size: 11px; }.result-meta { display: flex; flex-wrap: wrap; gap: 12px; margin: 13px 0; color: var(--muted); font: 10px var(--mono); }.result-meta b { color: var(--ink); font-weight: 500; }.order-result pre, .lookup-result pre { max-height: 190px; margin: 0 0 12px; padding: 12px; overflow: auto; white-space: pre-wrap; word-break: break-word; border: 1px solid #d2eee0; border-radius: 7px; background: #fff; font: 11px/1.6 var(--mono); }.lookup-form { display: grid; gap: 9px; padding-top: 24px; }.lookup-row { display: grid; grid-template-columns: 1fr 92px; gap: 8px; }.lookup-result { display: grid; gap: 10px; }.lookup-result > div { display: flex; justify-content: space-between; gap: 12px; font-size: 12px; }.lookup-result > div span { color: var(--muted); }.lookup-result strong { font: 12px var(--mono); }
.toast { position: fixed; right: 22px; bottom: 22px; z-index: 50; max-width: 300px; padding: 12px 15px; color: #fff; background: var(--ink); border-left: 3px solid var(--teal); border-radius: 5px; font-size: 12px; opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s ease, transform .2s ease; }.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 780px) {
  .app-shell { width: min(100% - 24px, 600px); }.topbar { min-height: 66px; gap: 14px; }.connection-state { display: none; }.catalog-layout { grid-template-columns: 1fr; gap: 16px; padding-top: 16px; }.category-panel { padding: 14px; }.category-row { display: flex; gap: 7px; overflow-x: auto; }.category-button { width: auto; white-space: nowrap; }.category-note { display: none; }.catalog-toolbar { align-items: stretch; flex-direction: column; gap: 16px; }.search-box { width: 100%; }.product-row { grid-template-columns: 64px minmax(0, 1fr) auto; gap: 12px; }.product-thumb { width: 60px; height: 60px; }.product-thumb img { width: 56px; height: 56px; }.product-info { min-width: 0; }.product-price { grid-column: 2; justify-items: start; }.buy-button { grid-column: 3; grid-row: 1 / span 2; width: 82px; }.purchase-panel, .lookup-panel { padding: 24px 20px 32px; }
}
@media (max-width: 460px) {
  .topnav { gap: 12px; }.topnav a, .topnav button { font-size: 12px; }.product-row { grid-template-columns: 58px minmax(0, 1fr); padding: 12px; }.product-thumb { width: 54px; height: 54px; }.product-thumb img { width: 50px; height: 50px; }.buy-button { grid-column: 2; grid-row: auto; width: 100%; margin-top: 2px; }.product-price { grid-column: 2; }.product-heading { display: block; }.product-category { display: block; margin-bottom: 5px; }.product-heading h2 { white-space: normal; }.purchase-product { grid-template-columns: 88px minmax(0, 1fr); gap: 13px; }.purchase-thumb { width: 88px; height: 88px; }.purchase-thumb img, .purchase-thumb .image-placeholder { width: 78px; height: 78px; }.lookup-row { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; } }