:root {
  --bg: #f5f7f5;
  --surface: #ffffff;
  --ink: #17201c;
  --muted: #607169;
  --line: #d8dfd9;
  --accent: #0e6f67;
  --accent-dark: #084d47;
  --amber: #b46a34;
  --amber-soft: #fff3df;
  --soft: #e9f0eb;
  --radius: 8px;
  --shadow: 0 18px 50px rgba(24, 34, 29, 0.09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
.site-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 268px minmax(0, 1fr);
}
.side {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  background: #eef3ef;
  overflow: auto;
}
.brand { display: grid; gap: 7px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.brand strong { font-size: 22px; line-height: 1; font-weight: 760; }
.brand span { color: var(--muted); font-size: 13px; line-height: 1.45; }
.nav { display: grid; gap: 7px; margin-top: 18px; }
.nav a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 36px;
  padding: 8px 10px;
  border-radius: 6px;
  color: #293832;
  font-size: 14px;
}
.nav a:hover, .nav a:focus-visible, .nav a.active { background: #dfe8e2; outline: 2px solid transparent; }
.nav small { color: var(--muted); }
main { min-width: 0; padding: 32px; }
.page-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 360px);
  gap: 24px;
  align-items: start;
  margin-bottom: 26px;
}
.kicker { margin: 0 0 10px; color: var(--accent); font-size: 12px; font-weight: 760; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 880px; margin-bottom: 12px; font-size: 42px; line-height: 1.04; letter-spacing: 0; }
h2 { margin-bottom: 8px; font-size: 24px; line-height: 1.16; letter-spacing: 0; }
h3 { margin-bottom: 8px; font-size: 16px; line-height: 1.25; letter-spacing: 0; }
.intro { max-width: 780px; margin-bottom: 0; color: var(--muted); line-height: 1.6; font-size: 15px; }
.notice {
  padding: 13px;
  border: 1px solid #ead6b8;
  border-radius: var(--radius);
  background: var(--amber-soft);
  color: #774818;
  font-size: 13px;
  line-height: 1.45;
}
.import-summary {
  border-color: #b8cdc2;
  background: #f3f8f5;
}
.import-summary .panel-head {
  border-bottom-color: #d8e5de;
}
.import-summary ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.55;
  font-size: 14px;
}
.metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 28px; }
.metric { padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 8px 24px rgba(24,34,29,0.05); }
.metric b { display: block; font-size: 28px; line-height: 1; }
.metric span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.band { margin-top: 28px; }
.section-head { display: flex; justify-content: space-between; gap: 18px; align-items: end; margin-bottom: 14px; }
.section-note { max-width: 660px; color: var(--muted); line-height: 1.55; font-size: 14px; }
.grid-2, .grid-3 { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card, .panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(24,34,29,0.04);
}
.card { display: grid; gap: 10px; padding: 18px; }
.card p { color: var(--muted); line-height: 1.5; font-size: 14px; }
.card:hover { border-color: #9fb5aa; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 16px; border-bottom: 1px solid var(--line); }
.panel-body { padding: 16px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; }
.tag { display: inline-flex; align-items: center; min-height: 26px; padding: 4px 8px; border-radius: 6px; background: var(--soft); color: #34443d; font-size: 12px; line-height: 1.2; }
.tag.warn { background: var(--amber-soft); color: #774818; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 9px 13px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-weight: 720;
  font-size: 14px;
}
.button.secondary { background: transparent; color: var(--accent-dark); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.field { display: grid; gap: 6px; }
label { color: #33433c; font-size: 12px; font-weight: 720; text-transform: capitalize; }
input, select, textarea {
  width: 100%;
  min-height: 38px;
  border: 1px solid #cbd5ce;
  border-radius: 6px;
  background: #fff;
  padding: 9px 10px;
  color: var(--ink);
}
textarea { min-height: 102px; resize: vertical; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; font-size: 13px; }
th { background: #eef3ef; color: #314139; font-size: 12px; text-transform: uppercase; }
td { color: #394941; }
.split { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr); gap: 16px; }
.summary-box { display: grid; gap: 12px; }
.summary-box ul { margin: 0; padding-left: 18px; color: #3b4a43; line-height: 1.55; font-size: 14px; }
.footer-note { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; line-height: 1.5; }
@media (max-width: 1100px) {
  .site-shell { grid-template-columns: 1fr; }
  .side { position: relative; height: auto; }
  main { padding: 24px; }
  .page-head, .split, .grid-3 { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  main { padding: 18px; }
  h1 { font-size: 30px; line-height: 1.08; }
  .metrics, .grid-2, .form-grid { grid-template-columns: 1fr; }
  .section-head { display: grid; }
}

/* Supplier-site frame recovered from the accepted design references. */
.site-shell {
  display: block;
}
.side {
  position: sticky;
  z-index: 10;
  top: 0;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 14px 28px;
  border-right: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 249, 246, 0.94);
  backdrop-filter: blur(14px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding-bottom: 0;
  border-bottom: 0;
  min-width: 220px;
}
.brand strong {
  font-size: 18px;
}
.brand strong::before {
  content: "ET";
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-right: 10px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  vertical-align: middle;
}
.brand span {
  display: none;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  margin-top: 0;
  flex: 1;
}
.nav a {
  min-height: 34px;
  padding: 8px 10px;
  white-space: nowrap;
}
.nav a:last-child {
  margin-left: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 760;
}
main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 36px 28px 64px;
}
.supplier-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(380px, 0.82fr);
  gap: 28px;
  align-items: center;
  min-height: 520px;
  margin-bottom: 24px;
}
.supplier-copy h1 {
  font-size: 52px;
  line-height: 1.02;
  max-width: 760px;
}
.supplier-copy .intro {
  font-size: 16px;
  max-width: 680px;
}
.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.product-visual {
  min-height: 430px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(13, 111, 103, 0.08), transparent 40%),
    radial-gradient(circle at 75% 22%, rgba(180, 106, 52, 0.12), transparent 28%),
  #fff;
  box-shadow: var(--shadow);
}
.visual-photo {
  position: absolute;
  display: block;
  object-fit: contain;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,0.94);
  box-shadow: 0 14px 36px rgba(20, 33, 28, 0.11);
}
.visual-photo.filter { left: 34px; top: 48px; width: 178px; height: 122px; }
.visual-photo.heater { left: 68px; bottom: 48px; width: 170px; height: 108px; }
.visual-photo.dehumidifier { right: 34px; bottom: 36px; width: 176px; height: 124px; }
.cabinet-render {
  position: absolute;
  right: 42px;
  top: 42px;
  width: 210px;
  height: 285px;
  border: 2px solid #8a9992;
  border-radius: 5px;
  background: linear-gradient(135deg, #f9fbf8, #dce5df);
}
.cabinet-render::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 34px;
  width: 150px;
  height: 64px;
  border: 1px solid #aebbb5;
  background: #f5f8f5;
}
.cabinet-render::after {
  content: "";
  position: absolute;
  left: 36px;
  bottom: 42px;
  width: 136px;
  height: 86px;
  border: 1px solid #aebbb5;
  background: repeating-linear-gradient(0deg, #d3ded7 0 4px, #eef3ef 4px 10px);
}
.part {
  position: absolute;
  display: grid;
  align-content: center;
  gap: 5px;
  width: 145px;
  min-height: 86px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,0.92);
  box-shadow: 0 14px 35px rgba(20, 33, 28, 0.08);
}
.part b {
  font-size: 12px;
}
.part span {
  color: var(--muted);
  font-size: 11px;
}
.part.fan { left: 34px; top: 56px; }
.part.heater { left: 70px; bottom: 54px; }
.part.control { right: 46px; bottom: 36px; }
.part::before {
  content: "";
  width: 44px;
  height: 28px;
  border: 1px solid #9dafaa;
  border-radius: 5px;
  background: linear-gradient(90deg, #e7eeea, #f8faf8);
}
.feature-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.52fr);
  gap: 16px;
  margin: 22px 0 30px;
}
.feature-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(14, 111, 103, 0.08), transparent 52%),
    var(--surface);
  box-shadow: var(--shadow);
}
.feature-panel h2 {
  font-size: 28px;
}
.product-family {
  position: relative;
  overflow: hidden;
  min-height: 230px;
  padding-top: 104px;
}
.product-family.has-image {
  padding-top: 150px;
}
.product-family img {
  position: absolute;
  left: 18px;
  top: 18px;
  width: calc(100% - 36px);
  height: 112px;
  object-fit: contain;
  padding: 8px;
  border: 1px solid #d8dfd9;
  border-radius: 6px;
  background: #f8faf8;
}
.image-card {
  overflow: hidden;
  padding-top: 150px;
  position: relative;
}
.image-card > img {
  position: absolute;
  left: 18px;
  top: 18px;
  width: calc(100% - 36px);
  height: 112px;
  object-fit: cover;
  object-position: center;
  padding: 0;
  border: 1px solid #d8dfd9;
  border-radius: 6px;
  background: #f8faf8;
}
.product-family::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 18px;
  width: 96px;
  height: 64px;
  border: 1px solid #aab8b2;
  border-radius: 6px;
  background:
    repeating-linear-gradient(0deg, #d2ded7 0 5px, #f5f8f5 5px 11px),
    #eef4f0;
}
.product-family::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 22px;
  width: 72px;
  height: 72px;
  border: 2px solid #93a39c;
  border-radius: 999px;
  background: radial-gradient(circle, transparent 34%, #dfe8e3 36% 43%, transparent 45%);
}
.product-family.has-image::before,
.product-family.has-image::after {
  display: none;
}
.product-family.heating::before {
  width: 108px;
  height: 42px;
  background: repeating-linear-gradient(90deg, #d9e4dd 0 8px, #f8faf8 8px 15px);
}
.product-family.accessories::before {
  width: 120px;
  height: 46px;
  background: linear-gradient(90deg, #f8faf8 0 22%, #dce7e0 22% 34%, #f8faf8 34%);
}
.route-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.route-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: #34443d;
  font-size: 14px;
}
.route-list li:last-child {
  border-bottom: 0;
}
.route-list strong {
  color: var(--ink);
}
.doc-card {
  min-height: 178px;
  background:
    linear-gradient(180deg, transparent 0 58px, rgba(233, 240, 235, 0.72) 58px 59px, transparent 59px),
    var(--surface);
}
.doc-card::before {
  content: "";
  width: 46px;
  height: 58px;
  border: 1px solid #aab8b2;
  border-radius: 4px;
  background:
    linear-gradient(90deg, transparent 70%, #e3ebe6 70%),
    repeating-linear-gradient(0deg, transparent 0 9px, #c8d4ce 9px 10px);
}
.doc-card.has-image {
  padding-top: 150px;
}
.doc-card.has-image::before {
  display: none;
}
.series-visual {
  display: grid;
  grid-template-columns: minmax(0, 0.58fr) minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}
.series-visual img {
  width: 100%;
  height: 240px;
  object-fit: contain;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8faf8;
}
.rfq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.42fr);
  gap: 16px;
  align-items: start;
}
.rfq-sidebar {
  position: sticky;
  top: 92px;
}
.compact-band {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f9fbf8;
}
.compact-band.visual-card img {
  width: 100%;
  height: 170px;
  object-fit: contain;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.output-box {
  width: 100%;
  min-height: 220px;
  white-space: pre-wrap;
  overflow: auto;
  border: 1px solid #cbd5ce;
  border-radius: 6px;
  background: #f8faf8;
  padding: 12px;
  color: #26362f;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.55;
}
.output-box.compact-output {
  min-height: 150px;
}
@media (min-width: 981px) {
  #selector-form .band,
  #rfq-form .band {
    margin-top: 18px;
  }
  #selector-form .form-grid,
  #rfq-form .form-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }
  #selector-form .panel-head,
  #rfq-form .panel-head,
  .rfq-sidebar .panel-head {
    padding: 12px 14px;
  }
  #selector-form .panel-body,
  #rfq-form .panel-body,
  .rfq-sidebar .panel-body {
    padding: 14px;
  }
  #selector-form textarea,
  #rfq-form textarea {
    min-height: 84px;
  }
  #selector-form + .band .output-box,
  .rfq-layout .output-box {
    min-height: 180px;
  }
  .rfq-layout .output-box.compact-output {
    min-height: 132px;
  }
}
.check-grid {
  display: grid;
  gap: 7px;
  padding: 9px 10px;
  border: 1px solid #cbd5ce;
  border-radius: 6px;
  background: #fff;
}
.check-option {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #34443d;
  font-size: 13px;
  text-transform: none;
}
.check-option input {
  width: auto;
  min-height: 0;
}
.problem-grid .card,
.grid-3 .card,
.grid-2 .card {
  min-height: 150px;
}
@media (max-width: 980px) {
  .side {
    align-items: flex-start;
    flex-direction: column;
  }
  .nav {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  .supplier-hero,
  .page-head,
  .feature-band,
  .series-visual,
  .rfq-layout {
    grid-template-columns: 1fr;
  }
  .rfq-sidebar {
    position: static;
  }
  .rfq-sidebar .panel {
    margin-top: 12px;
  }
  .supplier-copy h1 {
    font-size: 38px;
  }
}
@media (max-width: 560px) {
  .side {
    padding: 14px 28px 16px;
  }
  .nav a {
    padding: 7px 9px;
  }
  main {
    padding: 22px 16px 44px;
  }
  .band {
    margin-top: 18px;
  }
  .card {
    min-height: 0;
    padding: 14px;
  }
  .panel-head {
    align-items: flex-start;
    flex-direction: column;
    padding: 13px 14px;
  }
  .panel-body {
    padding: 14px;
  }
  .feature-panel {
    padding: 18px;
  }
  .actions {
    gap: 8px;
    margin-top: 12px;
  }
  .button {
    width: 100%;
    min-height: 40px;
  }
  .panel-head .actions,
  .panel-head .button {
    width: 100%;
  }
  input, select, textarea {
    font-size: 16px;
  }
  .output-box {
    min-height: 170px;
    max-height: 360px;
    font-size: 11px;
  }
  .output-box.compact-output {
    min-height: 120px;
  }
  .tag {
    min-height: 24px;
  }
  .check-option {
    align-items: flex-start;
  }
  .product-visual {
    min-height: 520px;
  }
  .cabinet-render {
    right: 22px;
    top: 42px;
    width: 210px;
    height: 285px;
  }
  .part {
    width: 150px;
  }
  .part.fan { left: 34px; top: 62px; }
  .part.heater { left: 34px; bottom: 122px; }
  .part.control { right: 28px; bottom: 28px; }
}