:root {
  --ink: #17201c;
  --muted: #647069;
  --line: #d9dedb;
  --soft-line: #e8ebe9;
  --paper: #f7f8f6;
  --white: #ffffff;
  --forest: #174f3a;
  --forest-dark: #103a2b;
  --mint: #dce9e2;
  --gold: #d39b2f;
  --gold-soft: #f5ead1;
  --blue: #315f7d;
  --danger: #a44135;
  --shadow: 0 14px 40px rgba(26, 39, 32, .14);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { min-width: 320px; background: var(--paper); }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: 0;
}

button, input, select { font: inherit; letter-spacing: 0; }
button, select { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid rgba(49, 95, 125, .28); outline-offset: 2px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-header {
  min-height: 76px;
  padding: 14px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.brand-block { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  background: transparent;
}
.brand-mark img { width: 100%; height: 100%; display: block; object-fit: contain; }
.brand-block h1 { margin: 0; font-size: 30px; line-height: 1.1; }
.header-actions { display: flex; gap: 10px; }

.quiet-button, .primary-button, .text-button, .icon-button {
  border: 0;
  border-radius: 6px;
  transition: background .16s ease, border-color .16s ease, color .16s ease, transform .16s ease;
}
.quiet-button, .primary-button {
  min-height: 40px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
}
.quiet-button { color: var(--ink); background: var(--white); border: 1px solid var(--line); }
a.quiet-button { text-decoration: none; }
.quiet-button:hover { background: #f3f5f3; }
.quiet-button[aria-pressed="true"] { color: var(--forest); background: var(--mint); border-color: #afc8ba; }
.primary-button { color: var(--white); background: var(--forest); }
.primary-button:hover:not(:disabled) { background: var(--forest-dark); }
.primary-button:disabled { cursor: not-allowed; opacity: .45; }
.quiet-button b, .primary-button b {
  min-width: 21px;
  height: 21px;
  padding: 0 6px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  font-size: 11px;
  background: rgba(0, 0, 0, .08);
}
.primary-button b { background: rgba(255, 255, 255, .2); }

.category-nav {
  height: 88px;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 310px));
  justify-content: start;
  gap: 1px;
  background: #e1e5e2;
  border-bottom: 1px solid var(--line);
}
.category-tab {
  position: relative;
  padding: 13px 22px 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto 1fr;
  align-items: end;
  color: var(--muted);
  text-align: left;
  background: #eef1ef;
  border: 0;
}
.category-tab::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: transparent; }
.category-tab.active { color: var(--ink); background: var(--white); }
.category-tab.active::after { background: var(--forest); }
.tab-kicker { grid-column: 1 / -1; align-self: start; font-size: 10px; font-weight: 800; color: var(--blue); }
.tab-name { font-size: 25px; font-weight: 800; }
.tab-count { min-width: 36px; text-align: right; color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }

.workspace { max-width: 1680px; margin: 0 auto; display: grid; grid-template-columns: 260px minmax(0, 1fr); }
.filter-panel {
  min-height: calc(100vh - 164px);
  padding: 26px 22px 80px 32px;
  background: #f1f3f1;
  border-right: 1px solid var(--line);
}
.filter-heading { margin-bottom: 18px; display: flex; align-items: center; justify-content: space-between; }
.filter-heading h2 { margin: 0; font-size: 17px; }
.text-button { padding: 4px; color: var(--forest); background: transparent; font-weight: 700; font-size: 12px; }
.text-button:hover { color: var(--forest-dark); text-decoration: underline; }

.search-field {
  height: 42px;
  margin-bottom: 22px;
  padding: 0 11px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.search-field input { min-width: 0; width: 100%; height: 100%; padding: 0; color: var(--ink); background: transparent; border: 0; outline: 0; }
.search-field:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(49, 95, 125, .12); }
.field-label { margin: 15px 0 6px; display: block; color: var(--muted); font-size: 12px; font-weight: 700; }
.filter-panel select, .sort-field select {
  width: 100%;
  height: 40px;
  padding: 0 34px 0 10px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.check-group { margin-top: 22px; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.check-group label { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.check-group input { width: 17px; height: 17px; accent-color: var(--forest); }
.metric-filter { margin-top: 22px; padding-top: 17px; border-top: 1px solid var(--line); }
.metric-filter-title { margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; color: var(--ink); font-size: 12px; font-weight: 800; }
.metric-filter select, .metric-filter input { width: 100%; height: 36px; padding: 0 9px; color: var(--ink); background: var(--white); border: 1px solid var(--line); border-radius: 5px; font-size: 12px; }
.metric-filter select:disabled, .metric-filter input:disabled { color: #98a19b; background: #eaeeeb; cursor: not-allowed; }
.metric-row { margin-top: 7px; display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.metric-direction-row { grid-template-columns: 1fr; }
.metric-input-row { grid-template-columns: 1.15fr 1fr; }
.metric-unit { margin-top: 7px; display: block; color: var(--muted); font-size: 10px; }
.metric-condition-list { margin-top: 10px; display: grid; gap: 5px; }
.metric-condition-empty { padding: 8px; color: var(--muted); background: #e8ece9; border-radius: 4px; text-align: center; font-size: 10px; }
.metric-condition-item { min-width: 0; padding: 6px 7px; display: grid; grid-template-columns: minmax(0, 1fr) 22px; align-items: center; gap: 5px; color: var(--forest-dark); background: var(--mint); border-radius: 4px; font-size: 10px; }
.metric-condition-item span { overflow-wrap: anywhere; }
.metric-condition-item button { width: 22px; height: 22px; padding: 0; color: var(--muted); background: transparent; border: 0; border-radius: 50%; font-size: 16px; }
.metric-condition-item button:hover { color: var(--danger); background: rgba(255,255,255,.7); }
.metric-actions { margin-top: 8px; display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.metric-add-button, .metric-apply-button { min-height: 36px; padding: 0 8px; border-radius: 5px; font-size: 11px; font-weight: 800; }
.metric-add-button { color: var(--forest); background: var(--white); border: 1px solid #aabfb3; }
.metric-add-button:hover { background: #edf3ef; }
.metric-add-button:disabled { cursor: not-allowed; opacity: .45; }
.metric-apply-button { color: var(--white); background: var(--forest); border: 1px solid var(--forest); }
.metric-apply-button:hover:not(:disabled) { background: var(--forest-dark); }
.metric-apply-button:disabled { cursor: not-allowed; opacity: .4; }
.metric-status { margin-top: 7px; display: block; color: var(--muted); font-size: 10px; }
.metric-list { min-height: 27px; margin-top: 10px; display: flex; flex-wrap: wrap; gap: 4px; }
.metric-pill { padding: 3px 5px; color: var(--blue); background: #edf2f4; border-radius: 3px; font-size: 10px; }
.source-summary { margin-top: 24px; color: var(--muted); }
.source-summary span, .source-summary small { display: block; font-size: 11px; }
.source-summary strong { margin: 4px 0; display: block; overflow-wrap: anywhere; color: var(--ink); font-size: 12px; }

.catalog { min-width: 0; padding: 26px 32px 110px; }
.catalog-toolbar { margin-bottom: 18px; display: flex; justify-content: space-between; align-items: end; gap: 20px; }
.eyebrow { margin: 0 0 4px; color: var(--blue); font-size: 10px; font-weight: 800; }
.catalog-toolbar h2, .dialog-title-row h2 { margin: 0; font-size: 24px; line-height: 1.25; }
.result-summary { margin: 6px 0 0; color: var(--muted); font-size: 12px; }
.sort-field { width: 170px; display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; }
.sort-field select { height: 36px; padding-left: 8px; font-size: 12px; }
.active-filters { min-height: 28px; margin-bottom: 10px; display: flex; align-items: flex-start; flex-wrap: wrap; gap: 6px; }
.filter-chip { padding: 4px 8px; color: var(--forest-dark); background: var(--mint); border-radius: 4px; font-size: 11px; }

.material-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.material-card {
  min-width: 0;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 7px;
  transition: box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}
.material-card:hover { transform: translateY(-2px); border-color: #b8c3bd; box-shadow: 0 10px 28px rgba(29, 46, 37, .1); }
.card-image-button { position: relative; width: 100%; padding: 0; display: block; background: #e8ebe8; border: 0; aspect-ratio: 4 / 3; overflow: hidden; }
.card-image-button img { width: 100%; height: 100%; display: block; object-fit: cover; }
.image-status { position: absolute; left: 8px; bottom: 8px; padding: 3px 6px; color: #4f554f; background: rgba(255,255,255,.9); border-radius: 3px; font-size: 10px; }
.favorite-button {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--ink);
  background: rgba(255, 255, 255, .92);
  border: 1px solid rgba(23, 32, 28, .14);
  border-radius: 50%;
  font-size: 21px;
  line-height: 1;
}
.favorite-button.active { color: #9b6b13; background: var(--gold-soft); border-color: #d7bb84; }
.card-body { padding: 14px; }
.card-meta { min-height: 20px; display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.material-code { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--blue); font-family: Consolas, monospace; font-size: 11px; }
.material-type { max-width: 55%; padding: 2px 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--forest-dark); background: var(--mint); border-radius: 3px; font-size: 10px; }
.material-name { min-height: 44px; margin: 8px 0 10px; display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 2; font-size: 15px; line-height: 1.45; }
.spec-list { min-height: 54px; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 5px 10px; }
.spec-list div { min-width: 0; }
.spec-list dt { color: var(--muted); font-size: 10px; }
.spec-list dd { margin: 1px 0 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; font-weight: 700; }
.card-footer { margin-top: 13px; padding-top: 11px; display: flex; align-items: center; justify-content: space-between; gap: 8px; border-top: 1px solid var(--soft-line); }
.supplier-count { color: var(--muted); font-size: 11px; }
.compare-toggle { padding: 5px 8px; color: var(--forest); background: transparent; border: 1px solid #b7c9bf; border-radius: 4px; font-size: 11px; font-weight: 700; }
.compare-toggle.selected { color: var(--white); background: var(--forest); border-color: var(--forest); }

.empty-state { min-height: 300px; display: grid; place-content: center; justify-items: center; gap: 5px; color: var(--muted); border: 1px dashed #bfc7c2; border-radius: 7px; }
.empty-state strong { color: var(--ink); font-size: 16px; }
.pagination { min-height: 38px; margin-top: 28px; display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 6px; }
.pagination button { min-width: 36px; height: 36px; padding: 0 10px; color: var(--ink); background: var(--white); border: 1px solid var(--line); border-radius: 5px; }
.pagination button.active { color: var(--white); background: var(--forest); border-color: var(--forest); }
.pagination button:disabled { opacity: .4; cursor: default; }

.compare-tray {
  position: fixed;
  z-index: 20;
  left: 50%;
  bottom: 18px;
  width: min(820px, calc(100% - 32px));
  min-height: 70px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--white);
  background: #1e2823;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 7px;
  box-shadow: var(--shadow);
  transform: translateX(-50%);
}
.compare-items { min-width: 0; flex: 1; display: flex; gap: 8px; overflow-x: auto; }
.tray-item { min-width: 120px; max-width: 160px; padding: 7px 8px; display: grid; grid-template-columns: 1fr auto; gap: 4px; color: var(--ink); background: var(--white); border-radius: 4px; }
.tray-item span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; }
.tray-item button { padding: 0 2px; color: var(--muted); background: transparent; border: 0; }

dialog { color: var(--ink); background: var(--white); border: 0; padding: 0; box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(14, 20, 17, .56); }
.detail-dialog { width: min(1060px, calc(100% - 32px)); max-height: calc(100vh - 32px); border-radius: 8px; }
.compare-dialog { width: min(1180px, calc(100% - 32px)); max-height: calc(100vh - 32px); padding: 26px; border-radius: 8px; }
.dialog-close { position: absolute; z-index: 2; top: 14px; right: 14px; width: 38px; height: 38px; color: var(--ink); background: rgba(255,255,255,.94); border: 1px solid var(--line); border-radius: 50%; font-size: 25px; line-height: 1; }
.dialog-close.static { position: static; flex: 0 0 auto; }
.dialog-title-row { display: flex; justify-content: space-between; align-items: start; gap: 20px; }
.detail-hero { display: grid; grid-template-columns: minmax(300px, 44%) 1fr; }
.detail-image { min-height: 430px; background: #e8ebe8; }
.detail-image img { width: 100%; height: 100%; display: block; object-fit: cover; }
.detail-intro { padding: 46px 42px 32px; }
.detail-code { color: var(--blue); font-family: Consolas, monospace; font-size: 12px; }
.detail-intro h2 { margin: 9px 0 6px; font-size: 26px; line-height: 1.35; }
.detail-class { display: inline-block; padding: 4px 8px; color: var(--forest-dark); background: var(--mint); border-radius: 3px; font-size: 11px; font-weight: 700; }
.detail-description { margin: 18px 0 24px; color: #465149; }
.key-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.key-fact { min-height: 70px; padding: 11px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.key-fact span { display: block; color: var(--muted); font-size: 10px; }
.key-fact strong { margin-top: 4px; display: block; overflow-wrap: anywhere; font-size: 12px; }
.detail-sections { padding: 0 42px 42px; }
.detail-section { padding-top: 28px; }
.detail-section h3 { margin: 0 0 13px; font-size: 16px; }
.parameter-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.parameter-item { min-height: 62px; padding: 10px 12px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.parameter-item dt { color: var(--muted); font-size: 10px; }
.parameter-item dd { margin: 4px 0 0; overflow-wrap: anywhere; font-size: 12px; font-weight: 700; }
.color-list { display: flex; flex-wrap: wrap; gap: 7px; }
.color-item { padding: 7px 9px; color: #4c4435; background: var(--gold-soft); border: 1px solid #e3cca0; border-radius: 4px; font-size: 11px; }
.supplier-table, .compare-table { width: 100%; border-collapse: collapse; font-size: 11px; }
.supplier-table th, .supplier-table td, .compare-table th, .compare-table td { padding: 10px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.supplier-table th, .compare-table th { color: var(--muted); background: #f0f3f1; font-weight: 700; }
.supplier-table td, .compare-table td { overflow-wrap: anywhere; }
.compare-table-wrap { margin-top: 22px; overflow: auto; max-height: calc(100vh - 150px); border: 1px solid var(--line); }
.compare-table { min-width: 720px; }
.compare-table th:first-child { position: sticky; left: 0; z-index: 1; min-width: 120px; }
.compare-table td:first-child { position: sticky; left: 0; min-width: 120px; color: var(--muted); background: #f8f9f8; font-weight: 700; }
.compare-head { min-width: 190px; }
.compare-head img { width: 100%; max-width: 180px; aspect-ratio: 4 / 3; display: block; object-fit: cover; border-radius: 4px; }
.compare-head strong { margin-top: 8px; display: block; color: var(--ink); }

@media (max-width: 1280px) {
  .material-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .workspace { grid-template-columns: 220px minmax(0, 1fr); }
  .filter-panel { padding-left: 20px; }
  .catalog { padding-left: 20px; padding-right: 20px; }
  .material-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .detail-hero { grid-template-columns: 1fr; }
  .detail-image { min-height: 320px; max-height: 480px; }
}

@media (max-width: 720px) {
  .app-header { padding: 12px 16px; align-items: flex-start; }
  .header-actions span:not(:first-child) { display: none; }
  .quiet-button, .primary-button { padding: 0 10px; }
  .category-nav { height: 78px; padding: 0 16px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-tab { padding: 10px 14px; }
  .tab-name { font-size: 21px; }
  .workspace { display: block; }
  .filter-panel { min-height: auto; padding: 15px 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  .filter-heading, .source-summary { display: none; }
  .filter-panel { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 10px; }
  .search-field { grid-column: 1 / -1; margin: 0; }
  .field-label { display: none; }
  .filter-panel select { margin: 0; }
  .check-group { grid-column: 1 / -1; margin: 0; padding: 7px 0 0; border: 0; }
  .metric-filter { grid-column: 1 / -1; margin: 2px 0 0; padding-top: 10px; }
  .catalog { padding: 20px 16px 110px; }
  .catalog-toolbar { align-items: start; }
  .sort-field { width: 132px; grid-template-columns: 1fr; gap: 3px; }
  .sort-field span { display: none; }
  .material-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .card-body { padding: 10px; }
  .material-name { min-height: 42px; font-size: 13px; }
  .spec-list { display: block; min-height: 48px; }
  .spec-list div:nth-child(n+3) { display: none; }
  .card-footer { align-items: stretch; flex-direction: column; }
  .compare-tray { align-items: stretch; flex-direction: column; }
  .compare-items { width: 100%; }
  .detail-intro { padding: 34px 20px 24px; }
  .detail-sections { padding: 0 20px 30px; }
  .parameter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 420px) {
  .brand-mark { width: 48px; height: 48px; }
  .brand-block h1 { font-size: 24px; }
  .header-actions { gap: 6px; }
  .material-grid { grid-template-columns: 1fr; }
  .card-image-button { aspect-ratio: 16 / 10; }
  .parameter-grid, .key-facts { grid-template-columns: 1fr; }
}