:root {
  --color-canvas: #f1f0ee;
  --color-paper: #ffffff;
  --color-ink: #252525;
  --color-muted: #666666;
  --color-border: #252525;
  --color-border-soft: rgba(37, 37, 37, 0.14);
  --color-brand-blue: #083f97;
  --color-brand-blue-dark: #062e70;
  --color-on-blue: #ffffff;
  --color-accent: #ff5a1f;
  --color-whatsapp: #25d366;
  --color-whatsapp-hover: #1ebe5d;

  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', Menlo, Consolas, monospace;

  --text-display: clamp(2.25rem, 5vw, 4.25rem);
  --text-h2: clamp(1.5rem, 3vw, 2.75rem);
  --text-h3: 1.25rem;
  --text-body: 1rem;
  --text-sm: 0.875rem;
  --text-mono-xs: 0.6875rem;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;

  --container-max: 1500px;
  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 28px;

  --ease-industrial: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 200ms;
  --duration-base: 400ms;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

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

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

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: var(--text-display);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 800;
  text-transform: uppercase;
  max-width: 16ch;
}

h2 {
  font-size: var(--text-h2);
  line-height: 1.1;
  letter-spacing: -0.015em;
  font-weight: 800;
  text-transform: uppercase;
  max-width: 24ch;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-canvas);
  padding: 10px 16px;
  z-index: 200;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
}

.container {
  width: min(var(--container-max), calc(100% - 40px));
  margin: 0 auto;
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-mono-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  line-height: 1.5;
}

/* */

.topbar {
  background: var(--color-brand-blue);
  color: var(--color-on-blue);
}

.topbar-inner {
  padding: 10px 20px;
}

.topbar-lines {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.topbar-lines a {
  color: inherit;
}

.topbar-lines .topbar-line {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.5;
  padding: 2px 0;
}

.topbar-desktop {
  display: none;
}

.topbar-desktop-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px 0;
}

.topbar-desktop-inner .topbar-line {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.topbar-links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-border-soft);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 20px;
}

.wordmark {
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  font-size: 17px;
  line-height: 1.1;
  display: block;
}

.wordmark em {
  font-style: normal;
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: var(--color-brand-blue);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink);
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a[aria-current='page'] {
  border-bottom-color: var(--color-accent);
}

.nav-cta {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-panel {
  display: none;
  border-top: 1px solid var(--color-border-soft);
  background: var(--color-paper);
}

.nav-panel.open {
  display: block;
}

.nav-panel a {
  display: block;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-border-soft);
}

.nav-panel .btn {
  margin: 16px 20px;
}

/* */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 48px;
  transition: background-color var(--duration-fast) var(--ease-industrial),
    color var(--duration-fast) var(--ease-industrial),
    border-color var(--duration-fast) var(--ease-industrial),
    transform var(--duration-fast) var(--ease-industrial);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-brand-blue);
  color: var(--color-on-blue);
}

.btn-primary:hover {
  background: var(--color-brand-blue-dark);
}

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: #ffffff;
}

.btn-whatsapp:hover {
  background: var(--color-whatsapp-hover);
}

.btn-outline {
  border-color: var(--color-border);
  color: var(--color-ink);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-canvas);
}



.section {
  padding: 72px 0;
}

.section-head {
  margin-bottom: 40px;
}

.section-head .mono {
  color: var(--color-brand-blue);
  display: block;
  margin-bottom: 10px;
}

.section-body-lead {
  margin-top: 16px;
  max-width: 72ch;
  color: var(--color-muted);
  font-size: 17px;
  line-height: 1.65;
}

/* */

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--duration-fast) var(--ease-industrial),
    transform var(--duration-fast) var(--ease-industrial);
}

.product-card:hover {
  box-shadow: 0 18px 44px rgba(37, 37, 37, 0.12);
  transform: translateY(-2px);
}

.card-media {
  position: relative;
  height: 300px;
  background: var(--color-paper);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.card-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 82%, rgba(255, 255, 255, 0.92) 100%);
  pointer-events: none;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 22px 24px;
  flex: 1;
}

.card-title {
  font-size: 1.12rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.card-model {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-brand-blue);
  font-weight: 600;
}

.card-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
}

.card-info .row {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.55;
  text-transform: uppercase;
  color: var(--color-ink);
}

.card-info .row b {
  font-weight: 600;
  color: var(--color-muted);
}

.card-cta {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.card-cta .link {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-brand-blue);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

.card-cta .best-price {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* */

.factory-section {
  background: var(--color-ink);
  color: var(--color-canvas);
}

.factory-section h2 {
  color: var(--color-canvas);
}

.factory-section .section-body-lead {
  color: rgba(241, 240, 238, 0.78);
}

.factory-photos {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}

.factory-photos figure {
  margin: 0;
}

.factory-photos img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid rgba(241, 240, 238, 0.25);
}

/* */

.trust-section {
  text-align: center;
}

.trust-section h2 {
  margin: 0 auto;
}

.trust-section .section-body-lead {
  margin-left: auto;
  margin-right: auto;
}



.inquiry-section {
  background: var(--color-paper);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.inquiry-section h2 {
  margin: 0 auto;
}

.inquiry-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.inquiry-wechat {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 56px 0 48px;
}

.footer-grid {
  display: grid;
  gap: 32px;
}

.footer-line {
  font-size: 15px;
  line-height: 1.6;
  max-width: 52ch;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink);
  width: fit-content;
}

.footer-copy {
  border-top: 1px solid var(--color-border-soft);
  margin-top: 32px;
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* */

.whatsapp-float {
  position: fixed;
  right: 16px;
  bottom: 20px;
  z-index: 150;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: var(--color-whatsapp);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  transition: background-color var(--duration-fast) var(--ease-industrial);
}

.whatsapp-float:hover {
  background: var(--color-whatsapp-hover);
}

/* */

.page-head {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.breadcrumb a:hover {
  color: var(--color-brand-blue);
}

.breadcrumb .sep {
  color: var(--color-border);
}

.breadcrumb [aria-current='page'] {
  color: var(--color-ink);
  font-weight: 600;
}

/* */

.product-layout {
  display: grid;
  gap: 48px;
}

.gallery-main {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 18px;
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-main.square {
  aspect-ratio: 1 / 1;
}

.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.gallery-thumbs {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.gallery-thumbs button {
  flex: 0 0 auto;
  width: 72px;
  height: 72px;
  padding: 6px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  background: var(--color-paper);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-thumbs button[aria-current='true'] {
  border-color: var(--color-brand-blue);
  outline: 1px solid var(--color-brand-blue);
}

.gallery-thumbs img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-info h1 {
  margin-bottom: 8px;
}

.product-model {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-brand-blue);
  font-weight: 600;
  display: block;
  margin-bottom: 18px;
}

.product-desc {
  color: var(--color-muted);
  font-size: 17px;
  line-height: 1.65;
  max-width: 62ch;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 34px;
}

.hard-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  margin-bottom: 34px;
}

.hard-info .row {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  line-height: 1.55;
  text-transform: uppercase;
}

.hard-info .row b {
  color: var(--color-muted);
  font-weight: 600;
}

.block-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-brand-blue);
  display: block;
  margin: 0 0 14px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 34px;
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border-soft);
  vertical-align: top;
}

.spec-table th {
  width: 38%;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-muted);
  background: rgba(37, 37, 37, 0.04);
}

.spec-table td {
  font-size: 0.98rem;
}

.logo-methods {
  margin-bottom: 34px;
}

.logo-methods p {
  font-size: 1rem;
  line-height: 1.6;
  max-width: 62ch;
}

.best-price-line {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-ink);
  border-left: 3px solid var(--color-accent);
  padding-left: 14px;
  margin-bottom: 34px;
}

.related-section {
  border-top: 1px solid var(--color-border);
  margin-top: 64px;
  padding-top: 56px;
}



.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-base) var(--ease-industrial),
    transform var(--duration-base) var(--ease-industrial);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .product-card {
    transition: none;
  }
}

/* */

@media (min-width: 561px) {
  .topbar-lines {
    display: none;
  }
  .topbar-desktop {
    display: block;
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .product-grid .product-card:last-child {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(260px, 380px) 1fr;
  }
  .product-grid .product-card:last-child .card-media {
    height: 100%;
    min-height: 300px;
  }
  .card-media {
    height: 390px;
  }
  .footer-grid {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
  }
}

@media (min-width: 769px) {
  .nav-links {
    display: flex;
  }
  .nav-cta {
    display: inline-flex;
  }
  .nav-toggle {
    display: none;
  }
  .channel-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .about-photos {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .product-grid .product-card:last-child {
    grid-template-columns: minmax(300px, 420px) 1fr;
  }
  .factory-photos {
    grid-template-columns: repeat(3, 1fr);
  }
  .product-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1440px) {
  .product-grid {
    grid-template-columns: repeat(5, 1fr);
  }
  .product-grid .product-card:last-child {
    grid-column: auto;
    display: flex;
  }
  .product-grid .product-card:last-child .card-media {
    height: 390px;
    min-height: 0;
  }
  .hero {
    padding: 88px 0 104px;
  }
  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }
}

@media (min-width: 1280px) {
  .section {
    padding: 96px 0;
  }
}