.chain-tool-page {
  background: #fff;
  font-family: Inter, Arial, "Microsoft YaHei", "微软雅黑", sans-serif;
}

.chain-tool-page button,
.chain-tool-page input,
.chain-tool-page select,
.chain-tool-page textarea {
  font-family: inherit;
}

.chain-header-search {
  grid-template-columns: minmax(220px, 1fr) 104px;
}

.chain-tool-hero {
  background: linear-gradient(135deg, #06234b 0%, #0b438e 62%, #125aa6 100%);
  color: #fff;
}

.chain-tool-hero .container {
  padding: 24px 0 28px;
}

.chain-breadcrumb {
  color: rgba(255, 255, 255, .78);
  margin-bottom: 16px;
}

.chain-breadcrumb a {
  color: #fff;
}

.chain-hero-content {
  max-width: 760px;
}

.chain-kicker {
  display: inline-block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.chain-hero-content h1 {
  margin: 0;
  max-width: 720px;
  color: #fff;
  font-size: clamp(36px, 4.6vw, 56px);
  line-height: 1.04;
  letter-spacing: 0;
}

.chain-hero-content p {
  max-width: 760px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, .9);
  font-size: 18px;
  line-height: 1.55;
  font-weight: 600;
}

.chain-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.chain-hero-actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-weight: 900;
  text-decoration: none;
}

.chain-hero-actions .btn-accent {
  border-color: var(--accent);
  background: var(--accent);
  color: #061833;
}

.chain-hero-actions .btn-light {
  border-color: rgba(255, 255, 255, .55);
  background: #fff;
  color: var(--brand);
}

.chain-tool-core {
  padding-top: 24px;
}

.chain-tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
  gap: 24px;
  align-items: start;
}

.chain-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 12px 32px rgba(7, 27, 53, .08);
}

.chain-form,
.chain-results {
  padding: 24px;
}

.chain-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.chain-card h2 {
  margin: 0;
  color: var(--brand);
  font-size: 26px;
  line-height: 1.18;
}

.chain-card h3 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.3;
}

.chain-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.chain-link-btn {
  appearance: none;
  min-height: 38px;
  border: 1px solid #b9cbe5;
  border-radius: 7px;
  background: #fff;
  color: var(--brand);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 0 14px;
  box-shadow: 0 1px 0 rgba(7, 27, 53, .04);
}

.chain-link-btn:hover,
.chain-link-btn:focus-visible {
  border-color: var(--brand);
  background: #eef6ff;
  outline: none;
}

.chain-presets {
  display: grid;
  grid-template-columns: auto repeat(3, minmax(0, 1fr));
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 10px;
  border: 1px solid #d7e4f5;
  border-radius: 8px;
  background: #f5f9fe;
}

.chain-presets span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
}

.chain-presets button {
  min-height: 38px;
  border: 1px solid #bfd3ed;
  border-radius: 7px;
  background: #fff;
  color: var(--brand);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 900;
  padding: 0 12px;
  white-space: nowrap;
  box-shadow: 0 1px 0 rgba(7, 27, 53, .03);
}

.chain-presets button:hover,
.chain-presets button.is-active {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.chain-alert {
  padding: 12px 14px;
  border: 1px solid #e6b9b9;
  border-radius: 8px;
  background: #fff0f0;
  color: #8b2323;
  font-weight: 700;
  margin-bottom: 18px;
}

.chain-form-section {
  padding-top: 20px;
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.chain-form-section:first-of-type {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.chain-section-note {
  margin: -4px 0 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.chain-field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 15px 14px;
}

.chain-field-grid label,
.chain-rfq {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 800;
  align-content: start;
}

.chain-field-grid span,
.chain-rfq span {
  font-size: 13px;
}

.chain-field-grid small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.45;
}

.chain-field-grid em {
  color: var(--muted);
  font-style: normal;
  font-weight: 700;
}

.chain-field-grid input,
.chain-field-grid select,
.chain-rfq textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid #bed0e8;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 500;
  align-self: start;
}

.chain-field-grid input,
.chain-field-grid select {
  height: 44px;
  padding: 8px 12px;
}

.chain-rfq textarea {
  resize: vertical;
  padding: 12px;
  line-height: 1.55;
}

.chain-field-grid input:focus,
.chain-field-grid select:focus,
.chain-rfq textarea:focus {
  outline: 2px solid rgba(15, 95, 168, .18);
  border-color: var(--brand-2);
}

.chain-advanced,
.chain-optional {
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7fafd;
}

.chain-advanced summary,
.chain-optional summary {
  cursor: pointer;
  color: var(--brand);
  font-weight: 900;
}

.chain-advanced .chain-field-grid,
.chain-optional .chain-field-grid {
  margin-top: 16px;
}

.chain-advanced-groups {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.chain-advanced-group {
  border: 1px solid #d7e4f5;
  border-radius: 8px;
  background: #fff;
  padding: 14px;
}

.chain-advanced-group h4 {
  margin: 0 0 12px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 900;
  line-height: 1.25;
}

.chain-advanced-group .chain-field-grid {
  margin-top: 0;
}

.chain-calc-btn {
  width: 100%;
  margin-top: 22px;
  justify-content: center;
  min-height: 48px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #061833;
  font-weight: 900;
  cursor: pointer;
}

.chain-calc-btn:hover {
  filter: brightness(.97);
}

.chain-results {
  position: sticky;
  top: 24px;
}

.chain-result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.chain-result-box {
  min-height: 96px;
  border: 1px solid #cfe0f4;
  border-radius: 8px;
  background: #f0f6fd;
  padding: 15px;
}

.chain-result-box span {
  display: block;
  margin-bottom: 8px;
  color: #44607f;
  font-size: 12px;
  font-weight: 800;
}

.chain-result-box strong {
  display: block;
  color: var(--brand);
  font-size: 22px;
  line-height: 1.25;
}

.chain-assumption-panel {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid #d7e4f5;
  border-radius: 8px;
  background: #f7fbff;
}

.chain-assumption-panel h3 {
  margin-bottom: 10px;
}

.chain-assumption-panel ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chain-assumption-panel li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
}

.chain-assumption-panel span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.chain-assumption-panel strong {
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-align: right;
}

.chain-result-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.chain-result-groups section {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.chain-result-groups dl {
  margin: 0;
  display: grid;
  gap: 10px;
}

.chain-result-groups div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.chain-result-groups dt {
  color: var(--muted);
  font-weight: 700;
}

.chain-result-groups dd {
  margin: 0;
  color: var(--ink);
  font-weight: 900;
  text-align: right;
}

.chain-rfq {
  margin-top: 20px;
  gap: 12px;
  color: var(--ink);
  font-weight: 400;
}

.chain-rfq-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.chain-rfq-head h3 {
  margin: 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.3;
}

.chain-rfq-head p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.chain-copy-inline {
  flex: 0 0 auto;
  min-width: 128px;
}

.chain-rfq-preview {
  display: grid;
  gap: 10px;
  max-height: 320px;
  overflow: auto;
  padding-right: 4px;
  scrollbar-width: thin;
}

.chain-rfq-group {
  border: 1px solid #d7e4f5;
  border-radius: 8px;
  background: #f8fbff;
  padding: 12px 13px;
}

.chain-rfq-group h4 {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: 14px;
  line-height: 1.25;
}

.chain-rfq-group ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chain-rfq-group li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.chain-rfq-group strong {
  color: var(--ink);
  font-weight: 900;
  text-align: right;
}

.chain-summary-source {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.chain-result-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.chain-result-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 14px;
}

.chain-result-actions .btn {
  min-height: 48px;
  padding: 0 18px;
  justify-content: center;
  white-space: nowrap;
  width: 100%;
}

.chain-result-actions .btn-accent {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #061833;
  font-weight: 900;
}

.chain-result-actions .btn-whatsapp {
  border: 1px solid #1fb85a;
  background: #1fb85a;
  color: #fff;
  font-weight: 900;
}

.chain-result-actions .btn-whatsapp:hover {
  background: #16994a;
  border-color: #16994a;
}

.chain-copy-status {
  min-height: 20px;
  margin-top: 10px;
  color: var(--brand);
  font-weight: 800;
}

.chain-tool-support {
  padding-top: 18px;
}

.chain-support-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.chain-support-grid article,
.chain-faq details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 22px;
}

.chain-support-grid article {
  display: flex;
  flex-direction: column;
}

.chain-support-grid h2,
.chain-faq h2 {
  margin: 0 0 12px;
  color: var(--brand);
}

.chain-support-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.chain-link-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  list-style: none;
}

.chain-link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 42px;
  border: 1px solid #d7e4f5;
  border-radius: 7px;
  background: #f8fbff;
  color: var(--brand);
  font-weight: 900;
  line-height: 1.25;
  padding: 0 12px;
  text-decoration: none;
}

.chain-link-list a::after {
  content: "›";
  color: var(--accent);
  font-size: 19px;
  font-weight: 900;
  line-height: 1;
}

.chain-link-list a:hover,
.chain-link-list a:focus-visible {
  border-color: #b9cbe5;
  background: #eef6ff;
  outline: none;
}

.chain-faq {
  padding-top: 18px;
}

.chain-faq-grid {
  display: grid;
  gap: 12px;
}

.chain-faq summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 900;
}

.chain-faq p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

@media (max-width: 1100px) {
  .chain-tool-grid {
    grid-template-columns: 1fr;
  }

  .chain-results {
    position: static;
  }
}

@media (max-width: 820px) {
  .chain-header-search {
    grid-template-columns: minmax(0, 1fr) 88px;
  }

  .chain-tool-hero .container {
    padding: 20px 0 24px;
  }

  .chain-hero-content h1 {
    font-size: 36px;
  }

  .chain-support-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .chain-form,
  .chain-results {
    padding: 18px;
  }

  .chain-field-grid,
  .chain-result-grid,
  .chain-result-groups,
  .chain-assumption-panel ul {
    grid-template-columns: 1fr;
  }

  .chain-card-head,
  .chain-result-groups div,
  .chain-result-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .chain-result-groups dd {
    text-align: left;
  }

  .chain-result-actions .btn,
  .chain-hero-actions .btn {
    flex-basis: auto;
    width: 100%;
    justify-content: center;
  }

  .chain-presets {
    grid-template-columns: 1fr;
  }

  .chain-presets button {
    width: 100%;
  }
}