:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-alt: #ecf2f7;
  --line: rgba(11, 23, 39, 0.1);
  --line-strong: rgba(11, 23, 39, 0.16);
  --text: #0f1728;
  --muted: #566375;
  --muted-strong: #334155;
  --accent: #0f9b92;
  --accent-strong: #0a766f;
  --accent-soft: rgba(15, 155, 146, 0.1);
  --success: #15803d;
  --danger: #c2410c;
  --shadow-sm: 0 14px 34px rgba(15, 23, 40, 0.06);
  --shadow-md: 0 22px 52px rgba(15, 23, 40, 0.1);
  --radius-card: 20px;
  --radius-panel: 28px;
  --max-width: 1200px;
  --font-sans: "Aptos", "Segoe UI Variable", "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

section[id],
main[id] {
  scroll-margin-top: 98px;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(15, 155, 146, 0.08), transparent 25%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--text);
  color: #ffffff;
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

button,
input,
select,
textarea {
  font: inherit;
}

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

.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;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 247, 251, 0.84);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.header-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 78px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  color: var(--text);
}

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

.brand__cn {
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.brand__en {
  font-size: 11px;
  line-height: 1;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--muted);
}

.main-nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
}

.main-nav a {
  position: relative;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted-strong);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.main-nav a:hover::after,
.main-nav a.is-active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-button {
  display: none;
  flex-direction: column;
  gap: 4px;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-button span {
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:focus-visible {
  outline: 3px solid rgba(15, 155, 146, 0.18);
  outline-offset: 3px;
}

.button--small {
  min-height: 40px;
  padding: 0 16px;
}

.button--primary {
  background: var(--text);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.button--secondary {
  background: var(--accent);
  color: #ffffff;
}

.button--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.hero {
  padding: 44px 0 28px;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 38px;
  align-items: center;
  min-height: calc(100dvh - 118px);
}

.hero-copy__label {
  margin: 0 0 16px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.hero-copy__title {
  margin: 0;
  max-width: 10.5ch;
  font-size: clamp(44px, 6vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero-copy__lede {
  max-width: 56ch;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-copy__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-gallery {
  position: relative;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  grid-template-rows: repeat(2, minmax(0, 240px));
  gap: 16px;
}

.hero-gallery__panel {
  overflow: hidden;
  border-radius: var(--radius-panel);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.hero-gallery__panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-gallery__panel--large {
  grid-row: 1 / span 2;
  min-height: 520px;
  animation: heroFloat 7s ease-in-out infinite;
}

.hero-gallery__panel--small {
  min-height: 250px;
}

.hero-note {
  position: absolute;
  right: 18px;
  bottom: 18px;
  width: min(260px, 70%);
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: var(--radius-card);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-sm);
}

.hero-note strong,
.hero-note span {
  display: block;
}

.hero-note strong {
  font-size: 15px;
}

.hero-note span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.metrics {
  padding: 0 0 28px;
}

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

.metric-card,
.service-card,
.fact-card,
.contact-stack__item,
.product-card,
.about-panel,
.inquiry-form {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.metric-card {
  padding: 22px 20px;
  border-radius: var(--radius-card);
}

.metric-card strong {
  display: block;
  font-size: 34px;
  line-height: 1;
}

.metric-card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 84px 0;
}

.section--muted {
  background: linear-gradient(180deg, rgba(236, 242, 247, 0.55) 0%, rgba(244, 247, 251, 0.2) 100%);
}

.section-head {
  max-width: 720px;
  margin-bottom: 30px;
}

.section-head__title {
  margin: 0;
  max-width: 16ch;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1;
  letter-spacing: -0.035em;
}

.section-head__text {
  max-width: 58ch;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.filter-chip {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted-strong);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.filter-chip.is-active {
  background: var(--text);
  border-color: var(--text);
  color: #ffffff;
}

.filter-chip:focus-visible,
.menu-button:focus-visible {
  outline: 3px solid rgba(15, 155, 146, 0.3);
  outline-offset: 3px;
}

.product-results {
  min-height: 22px;
  margin: -10px 0 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

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

.product-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-card.is-hidden {
  display: none;
}

.product-card--featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
}

.product-card__media {
  min-height: 250px;
  background: var(--surface-alt);
}

.product-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 22px;
}

.product-card__meta {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.product-card__title {
  margin: 0;
  font-size: 26px;
  line-height: 1.08;
}

.product-card__text {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.tag-row li {
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
}

.product-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
  padding-top: 20px;
}

.product-card__actions .button {
  flex: 1 1 0;
}

.services-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 26px;
  align-items: start;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.service-card {
  padding: 22px;
  border-radius: var(--radius-card);
}

.service-card strong {
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 12px;
}

.service-card h3 {
  margin: 18px 0 10px;
  font-size: 22px;
  line-height: 1.08;
}

.service-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 18px;
  align-items: start;
}

.about-panel {
  overflow: hidden;
  border-radius: var(--radius-panel);
}

.about-panel__media {
  aspect-ratio: 16 / 9;
}

.about-panel__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-panel__body {
  padding: 24px;
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.fact-card {
  padding: 22px;
  border-radius: var(--radius-card);
}

.fact-card strong {
  display: block;
  font-size: 30px;
  line-height: 1;
}

.fact-card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.inquiry-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 18px;
}

.contact-stack {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.contact-stack__item {
  padding: 18px;
  border-radius: var(--radius-card);
}

.contact-stack__item span {
  display: block;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.contact-stack__item a,
.contact-stack__item p {
  margin: 10px 0 0;
  font-size: 24px;
  line-height: 1.2;
}

.contact-stack__item p {
  color: var(--text);
}

.inquiry-form {
  padding: 24px;
  border-radius: var(--radius-panel);
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  font-size: 13px;
  font-weight: 700;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 14px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #ffffff;
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field textarea {
  min-height: 150px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(15, 155, 146, 0.12);
}

.field.has-error input,
.field.has-error select,
.field.has-error textarea {
  border-color: rgba(194, 65, 12, 0.64);
  box-shadow: 0 0 0 4px rgba(194, 65, 12, 0.1);
}

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 8px;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.form-status {
  min-height: 22px;
  margin: 14px 0 0;
  font-size: 14px;
  font-weight: 700;
}

.form-status.is-success {
  color: var(--success);
}

.form-status.is-error {
  color: var(--danger);
}

.button.is-loading {
  pointer-events: none;
  opacity: 0.82;
}

.site-footer {
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
}

.footer-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}

.fade-target {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-target.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.detail-page {
  padding: 34px 0 84px;
}

.detail-shell {
  display: grid;
  gap: 20px;
}

.detail-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.detail-breadcrumb strong {
  color: var(--text);
}

.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
  gap: 18px;
}

.detail-card,
.detail-image,
.detail-section,
.detail-contact,
.detail-pager a {
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.detail-image {
  overflow: hidden;
  border-radius: var(--radius-panel);
  min-height: 560px;
}

.detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-card {
  border-radius: var(--radius-panel);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.detail-card__label {
  margin: 0;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.detail-card__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.detail-card__subtitle {
  margin: 10px 0 0;
  color: var(--muted-strong);
  font-size: 18px;
  font-weight: 700;
}

.detail-card__text {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.detail-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.detail-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.detail-meta article {
  padding: 14px;
  border-radius: 16px;
  background: var(--surface-alt);
}

.detail-meta strong,
.detail-meta span {
  display: block;
}

.detail-meta strong {
  font-size: 13px;
}

.detail-meta span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.detail-tags li {
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
}

.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 18px;
}

.detail-section {
  border-radius: var(--radius-card);
  padding: 22px;
}

.detail-section h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.05;
}

.detail-section p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.detail-highlights {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.detail-highlights li {
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--surface-alt);
  color: var(--muted-strong);
  font-size: 14px;
  line-height: 1.7;
}

.detail-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.detail-gallery figure {
  margin: 0;
  overflow: hidden;
  border-radius: 18px;
  background: var(--surface-alt);
}

.detail-gallery img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.detail-gallery figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 13px;
}

.detail-specs {
  width: 100%;
  margin-top: 18px;
  border-collapse: collapse;
}

.detail-specs th,
.detail-specs td {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

.detail-specs th {
  width: 34%;
  color: var(--muted-strong);
  font-weight: 700;
}

.detail-specs td {
  color: var(--muted);
}

.detail-contact {
  border-radius: var(--radius-card);
  padding: 22px;
}

.detail-contact__row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.detail-contact__row article {
  padding: 16px;
  border-radius: 16px;
  background: var(--surface-alt);
}

.detail-contact__row span {
  display: block;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.detail-contact__row strong,
.detail-contact__row a,
.detail-contact__row p {
  display: block;
  margin: 8px 0 0;
  font-size: 18px;
  line-height: 1.4;
}

.detail-contact__row p {
  color: var(--text);
}

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

.detail-pager a {
  padding: 18px 20px;
  border-radius: var(--radius-card);
}

.detail-pager span,
.detail-pager strong {
  display: block;
}

.detail-pager span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.detail-pager strong {
  margin-top: 8px;
  font-size: 22px;
  line-height: 1.1;
}

@keyframes heroFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@media (max-width: 1080px) {
  .hero-layout,
  .services-layout,
  .about-layout,
  .inquiry-layout,
  .detail-hero,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .hero-gallery {
    order: -1;
  }

  .metrics-grid,
  .product-grid,
  .fact-grid,
  .detail-contact__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-card--featured {
    grid-column: auto;
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(var(--max-width), calc(100% - 28px));
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 10px 14px 18px;
    background: rgba(244, 247, 251, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    padding: 14px 10px;
  }

  .main-nav a::after {
    display: none;
  }

  .menu-button {
    display: flex;
  }

  .header-actions .button--small {
    display: none;
  }

  .hero {
    padding-top: 24px;
  }

  .hero-layout {
    min-height: auto;
  }

  .hero-copy__title {
    max-width: none;
    font-size: 42px;
  }

  .hero-gallery {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .hero-gallery__panel--large,
  .hero-gallery__panel--small {
    min-height: 260px;
  }

  .hero-note {
    position: static;
    width: auto;
  }

  .metrics-grid,
  .product-grid,
  .services-grid,
  .fact-grid,
  .field-row,
  .detail-meta,
  .detail-contact__row,
  .detail-pager,
  .detail-gallery {
    grid-template-columns: 1fr;
  }

  .detail-image {
    min-height: 320px;
  }

  .detail-gallery img {
    height: 240px;
  }

  .form-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .form-footer .button {
    width: 100%;
  }

  .footer-bar {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}