:root {
  --ink: #171717;
  --muted: #666b73;
  --line: #e7e8eb;
  --paper: #ffffff;
  --soft: #f6f7f8;
  --blue: #0b6fae;
  --blue-dark: #094a73;
  --orange: #f39a36;
  --green: #2e7d68;
  --shadow: 0 18px 42px rgba(20, 26, 34, 0.1);
  --radius: 8px;
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Noto Sans CJK SC",
    Arial,
    sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 10px clamp(16px, 4vw, 48px);
  border-bottom: 1px solid rgba(231, 232, 235, 0.9);
  background: rgba(255, 255, 255, 0.93);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 700;
  white-space: nowrap;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 36px);
  color: #2c2f35;
  font-size: 15px;
}

.nav-links a {
  position: relative;
  padding: 10px 0;
}

.nav-links a::after {
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 2px;
  background: var(--ink);
  content: "";
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  padding: 0 clamp(12px, 4vw, 48px) 34px;
  background: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);
}

.hero-image {
  width: 100%;
  max-height: min(620px, 72vh);
  margin: 0 auto;
  object-fit: contain;
  background: #f4f5f6;
}

.hero-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  max-width: 1180px;
  margin: -1px auto 0;
  padding: 22px clamp(18px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero-actions h1 {
  margin: 4px 0 0;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.18;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.action-buttons,
.demand-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-start;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 700;
  line-height: 1.2;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 12px 22px rgba(20, 26, 34, 0.12);
}

.button.primary {
  color: #fff;
  background: var(--blue);
}

.button.secondary {
  color: var(--blue-dark);
  border-color: #b7d5e8;
  background: #eef7fc;
}

.button.ghost {
  color: var(--ink);
  border-color: var(--line);
  background: var(--paper);
}

.button.small {
  min-height: 36px;
  padding: 8px 12px;
  font-size: 13px;
}

.quick-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 1180px;
  margin: 18px auto 0;
}

.quick-tags a,
.chips span {
  border: 1px solid #dbe0e5;
  border-radius: 999px;
  background: #fff;
  color: #32373f;
  font-size: 13px;
}

.quick-tags a {
  padding: 9px 14px;
}

.quick-tags a:hover,
.quick-tags a:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
}

.section {
  max-width: 1248px;
  margin: 0 auto;
  padding: clamp(34px, 7vw, 78px) clamp(16px, 4vw, 48px);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 24px;
}

.section-heading.split {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading.compact {
  margin-top: 22px;
}

.section-heading h2 {
  margin: 8px 0 8px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow) {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.text-link {
  flex: none;
  color: var(--blue);
  font-weight: 800;
}

.intro-layout,
.factory-layout,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: stretch;
}

.original-panel,
.wide-banner,
.title-image {
  width: 100%;
  border-radius: var(--radius);
}

.original-panel,
.wide-banner {
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(20, 26, 34, 0.08);
}

.title-image {
  margin: 0 0 20px;
}

.title-image.narrow {
  margin-top: 32px;
}

.value-list {
  display: grid;
  gap: 14px;
}

.value-list article {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.value-list span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  border-radius: 50%;
  color: #fff;
  background: var(--orange);
  font-size: 13px;
  font-weight: 800;
}

.value-list h3,
.supplier-card h3,
.category-info h3,
.factory-copy h2,
.demand-card h2 {
  margin: 0;
  letter-spacing: 0;
}

.value-list p,
.supplier-card p,
.category-info p,
.factory-copy p,
.demand-card p {
  color: var(--muted);
  line-height: 1.65;
}

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

.supplier-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 8px 24px rgba(20, 26, 34, 0.06);
}

.supplier-card img {
  width: 100%;
  aspect-ratio: 14 / 15.5;
  object-fit: cover;
}

.card-body {
  display: flex;
  min-height: 316px;
  flex: 1;
  flex-direction: column;
  gap: 12px;
  padding: 18px;
}

.card-body .button {
  align-self: flex-start;
  margin-top: auto;
}

.card-kicker {
  margin: 0;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chips span {
  padding: 6px 10px;
}

.category-section,
.supplier-new,
.partners-section {
  max-width: none;
}

.category-section > *,
.supplier-new > *,
.partners-section > * {
  max-width: 1248px;
  margin-right: auto;
  margin-left: auto;
}

.search-box {
  width: min(430px, 100%);
}

.search-box input,
.request-form input {
  width: 100%;
  min-height: 46px;
  border: 1px solid #cfd5dc;
  border-radius: var(--radius);
  outline: none;
  background: #fff;
}

.search-box input {
  padding: 0 16px;
}

.search-box input:focus,
.request-form input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(11, 111, 174, 0.12);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.category-card {
  position: relative;
  min-height: 330px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.category-card img {
  width: 100%;
  height: 100%;
  min-height: 330px;
  object-fit: cover;
}

.category-info {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 16px;
  color: #fff;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.78));
}

.category-info p {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.86);
}

.request-card {
  display: flex;
  align-items: end;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(11, 111, 174, 0.08), rgba(46, 125, 104, 0.12)),
    #fff;
}

.request-card p {
  color: var(--muted);
}

.empty-state {
  display: none;
  margin-top: 18px;
  padding: 24px;
  border: 1px dashed #bfc7d0;
  border-radius: var(--radius);
  text-align: center;
  background: #fafafa;
}

.empty-state.is-visible {
  display: block;
}

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

.new-supplier-grid img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.type-grid img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.demand-section {
  max-width: 1248px;
}

.demand-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: clamp(24px, 4vw, 42px);
  border-radius: var(--radius);
  color: #fff;
  background:
    linear-gradient(90deg, rgba(9, 74, 115, 0.96), rgba(46, 125, 104, 0.9)),
    #094a73;
}

.demand-card .eyebrow,
.demand-card p {
  color: rgba(255, 255, 255, 0.86);
}

.demand-card h2 {
  max-width: 760px;
  margin-top: 8px;
  font-size: clamp(24px, 3.5vw, 40px);
  line-height: 1.18;
}

.factory-copy,
.request-form {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 12px 30px rgba(20, 26, 34, 0.06);
}

.factory-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.request-form {
  display: grid;
  gap: 14px;
}

.request-form label {
  display: grid;
  gap: 8px;
  color: #30343a;
  font-size: 14px;
  font-weight: 800;
}

.request-form input {
  padding: 0 12px;
  font-weight: 400;
}

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

.form-note.success {
  color: var(--green);
  font-weight: 800;
}

.floating-contact {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 30;
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: var(--radius);
  color: #fff;
  background: var(--ink);
  box-shadow: 0 14px 28px rgba(20, 26, 34, 0.18);
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transform: translateY(14px);
  transition:
    opacity 160ms ease,
    transform 160ms ease;
}

.floating-contact.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.is-hidden {
  display: none !important;
}

@media (max-width: 980px) {
  .hero-actions,
  .intro-layout,
  .factory-layout,
  .contact-layout,
  .demand-card {
    grid-template-columns: 1fr;
  }

  .action-buttons,
  .demand-actions {
    justify-content: flex-start;
  }

  .supplier-grid,
  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    min-height: 58px;
  }

  .brand span {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .menu-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 58px;
    right: 12px;
    left: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 12px;
  }

  .hero {
    padding-right: 10px;
    padding-left: 10px;
  }

  .hero-image {
    max-height: none;
  }

  .hero-actions {
    margin-top: 10px;
    border-radius: var(--radius);
  }

  .section-heading.split {
    display: block;
  }

  .supplier-grid,
  .category-grid,
  .new-supplier-grid,
  .type-grid {
    grid-template-columns: 1fr;
  }

  .card-body {
    min-height: auto;
  }

  .floating-contact {
    right: 12px;
    bottom: 12px;
    min-height: 42px;
    padding: 0 14px;
    font-size: 14px;
  }
}

@media (max-width: 420px) {
  .action-buttons .button,
  .demand-actions .button {
    width: 100%;
  }

  .quick-tags a {
    flex: 1 1 calc(50% - 10px);
    text-align: center;
  }
}