:root {
  --ink: #17212b;
  --muted: #5d6978;
  --line: #dbe3ea;
  --paper: #ffffff;
  --soft: #f5f8fb;
  --blue: #1e6fb8;
  --blue-deep: #174f82;
  --green: #1a8f72;
  --red: #b73332;
  --gold: #c58a2e;
  --shadow: 0 18px 60px rgba(25, 43, 61, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 12px clamp(18px, 5vw, 72px);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 32px rgba(23, 33, 43, 0.08);
  backdrop-filter: blur(14px);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.site-header.scrolled,
.site-header.open {
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  box-shadow: 0 12px 32px rgba(23, 33, 43, 0.08);
}

.site-header.sub-header {
  position: sticky;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 260px;
}

.brand small {
  color: currentColor;
  font-size: 12px;
  opacity: 0.78;
  white-space: nowrap;
}

.brand img {
  display: block;
  width: 172px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  color: currentColor;
  font-size: 15px;
  font-weight: 600;
}

.nav a {
  opacity: 0.86;
}

.nav a:hover {
  opacity: 1;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: currentColor;
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 6px auto;
  background: currentColor;
}

.hero {
  position: relative;
  display: grid;
  min-height: 92vh;
  overflow: hidden;
  align-items: center;
  padding: 110px clamp(20px, 7vw, 96px) 80px;
}

.subpage {
  background: #fff;
}

.page-hero {
  padding: clamp(64px, 9vw, 118px) clamp(20px, 7vw, 96px) clamp(42px, 6vw, 72px);
  background:
    linear-gradient(135deg, rgba(30, 111, 184, 0.12), rgba(26, 143, 114, 0.09)),
    #f7fafc;
}

.page-hero h1 {
  max-width: 900px;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: clamp(38px, 5vw, 64px);
}

.page-hero p:last-child {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 19px;
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
}

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

.hero-shade {
  background:
    linear-gradient(90deg, rgba(10, 20, 31, 0.82), rgba(10, 20, 31, 0.48) 43%, rgba(10, 20, 31, 0.12)),
    linear-gradient(0deg, rgba(10, 20, 31, 0.26), rgba(10, 20, 31, 0));
}

.hero-content {
  position: relative;
  max-width: 720px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
}

.hero .eyebrow {
  color: #8df0cb;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 3.4vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.3;
}

.hero-copy {
  max-width: 620px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 20px;
}

.hero-actions,
.contact-card {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  font-weight: 800;
}

.primary-link {
  background: var(--green);
  color: #fff;
}

.secondary-link {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.stats-band div {
  padding: 30px clamp(18px, 4vw, 44px);
  background: #fff;
}

.stats-band strong {
  display: block;
  color: var(--blue);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
}

.stats-band span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-weight: 700;
}

.section {
  padding: clamp(68px, 9vw, 116px) clamp(20px, 7vw, 96px);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin-bottom: 0;
}

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

.position-grid article,
.service-card,
.case-list article {
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 8px 28px rgba(23, 33, 43, 0.06);
}

.position-grid article {
  padding: 30px;
}

.position-grid span,
.service-number {
  display: inline-block;
  margin-bottom: 22px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 900;
}

.position-grid p,
.service-card p,
.value-panel p,
.mission-band p,
.contact-card p {
  color: var(--muted);
}

.service-section,
.solution-section,
.rental-section {
  background: var(--soft);
}

.service-grid {
  align-items: stretch;
}

.service-card {
  padding: 32px;
}

.service-card.featured {
  background: var(--blue-deep);
  color: #fff;
}

.service-card.featured p {
  color: rgba(255, 255, 255, 0.82);
}

.rental-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.rental-grid-wide {
  grid-template-columns: 1fr;
}

.rental-card {
  padding: 30px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 8px 28px rgba(23, 33, 43, 0.06);
}

.rental-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.rental-top span {
  flex: 0 0 auto;
  padding: 4px 10px;
  background: rgba(30, 111, 184, 0.1);
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

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

.rental-card ul {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
}

.rental-card li {
  padding-left: 16px;
  border-left: 3px solid rgba(26, 143, 114, 0.38);
}

.article-list-section {
  background: #fff;
}

.article-list {
  display: grid;
  gap: 16px;
}

.article-list.compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 24px;
}

.article-list article {
  padding: 26px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 8px 28px rgba(23, 33, 43, 0.06);
}

.article-list span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 900;
}

.article-list h2,
.article-list h3 {
  margin-bottom: 8px;
}

.article-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.article-page {
  padding: clamp(40px, 6vw, 82px) clamp(20px, 7vw, 96px);
  background: var(--soft);
}

.article-content {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px);
  background: #fff;
  box-shadow: var(--shadow);
}

.article-content h1 {
  max-width: 100%;
  color: var(--ink);
  font-size: clamp(36px, 5vw, 58px);
}

.article-content h2 {
  margin-top: 34px;
  font-size: clamp(24px, 3vw, 34px);
}

.article-content p {
  color: var(--muted);
  font-size: 18px;
}

.article-lead {
  color: var(--ink) !important;
  font-size: 20px !important;
}

.article-image {
  margin: 28px 0 8px;
  border: 1px solid var(--line);
  background: #f3f6f8;
}

.article-image img {
  display: block;
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  padding: 14px;
}

.article-cta {
  display: grid;
  gap: 10px;
  margin-top: 36px;
  padding: 24px;
  border-left: 5px solid var(--green);
  background: var(--soft);
}

.article-cta strong {
  color: var(--ink);
  font-size: 22px;
}

.article-cta span {
  color: var(--muted);
}

.article-cta a {
  width: fit-content;
  margin-top: 6px;
  padding: 9px 14px;
  background: var(--green);
  color: #fff;
  font-weight: 800;
}

.model-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 20px;
}

.model-tags span,
.model-tags a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 5px 12px;
  border: 1px solid rgba(30, 111, 184, 0.22);
  background: rgba(30, 111, 184, 0.06);
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 700;
}

.products-section {
  background: var(--soft);
}

.product-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}

.product-tab {
  min-height: 86px;
  padding: 16px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.product-tab strong,
.product-tab span {
  display: block;
}

.product-tab strong {
  font-size: 19px;
}

.product-tab span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.product-tab.active {
  border-color: rgba(26, 143, 114, 0.5);
  background: var(--blue-deep);
  color: #fff;
}

.product-tab.active span {
  color: rgba(255, 255, 255, 0.75);
}

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

.product-card {
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 8px 28px rgba(23, 33, 43, 0.06);
}

.product-carousel {
  position: relative;
  display: grid;
  aspect-ratio: 4 / 3;
  place-items: center;
  background: #f3f6f8;
}

.product-carousel img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 16px;
}

.carousel-button {
  position: absolute;
  top: 50%;
  display: grid;
  width: 34px;
  height: 34px;
  transform: translateY(-50%);
  place-items: center;
  border: 1px solid rgba(23, 33, 43, 0.16);
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  font-size: 24px;
  cursor: pointer;
}

.carousel-button.prev {
  left: 10px;
}

.carousel-button.next {
  right: 10px;
}

.carousel-dots {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: flex;
  gap: 5px;
}

.carousel-dots span {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: rgba(23, 33, 43, 0.25);
}

.carousel-dots span.active {
  background: var(--green);
}

.product-body {
  padding: 20px;
}

.product-body h3 {
  margin-bottom: 8px;
}

.product-body p {
  min-height: 52px;
  color: var(--muted);
}

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

.product-tags span {
  padding: 4px 9px;
  background: rgba(30, 111, 184, 0.08);
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
}

.detail-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  margin-top: 18px;
  padding: 0 14px;
  background: var(--green);
  color: #fff;
  font-weight: 800;
}

.product-detail-page {
  padding: clamp(28px, 5vw, 64px) clamp(20px, 7vw, 96px) clamp(68px, 8vw, 108px);
  background: var(--soft);
}

.detail-back {
  margin-bottom: 18px;
}

.detail-back a {
  color: var(--blue-deep);
  font-weight: 800;
}

.detail-hero {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: center;
  padding: clamp(22px, 4vw, 42px);
  background: #fff;
  box-shadow: var(--shadow);
}

.detail-gallery {
  position: relative;
  display: grid;
  aspect-ratio: 4 / 3;
  place-items: center;
  background: #f3f6f8;
}

.detail-gallery img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 18px;
}

.detail-info h1 {
  margin-bottom: 16px;
  color: var(--ink);
  font-size: clamp(38px, 5vw, 62px);
}

.detail-info p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.detail-images-section {
  margin-top: 34px;
  padding: clamp(24px, 4vw, 44px);
  background: #fff;
}

.detail-images {
  display: grid;
  gap: 18px;
}

.detail-images img {
  display: block;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  border: 1px solid var(--line);
  background: #fff;
}

.value-section {
  background: #fff;
}

.value-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(30px, 7vw, 84px);
  align-items: start;
}

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

.capability-list div {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.capability-list strong {
  color: var(--blue-deep);
  font-size: 18px;
}

.capability-list span {
  color: var(--muted);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.solution-grid div {
  min-height: 76px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--blue-deep);
  font-weight: 800;
}

.case-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.case-list article {
  min-height: 180px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background:
    linear-gradient(150deg, rgba(30, 111, 184, 0.08), rgba(26, 143, 114, 0.12)),
    #fff;
}

.case-list span {
  color: var(--red);
  font-size: 14px;
  font-weight: 900;
}

.case-list h3 {
  margin: 8px 0 0;
}

.mission-band {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.8fr);
  gap: clamp(28px, 7vw, 90px);
  padding: clamp(58px, 8vw, 96px) clamp(20px, 7vw, 96px);
  background: var(--ink);
  color: #fff;
}

.mission-band .eyebrow {
  color: #8df0cb;
}

.mission-band h2 {
  margin-bottom: 0;
}

.mission-band p {
  align-self: end;
  color: rgba(255, 255, 255, 0.75);
  font-size: 18px;
}

.contact-card {
  justify-content: space-between;
  padding: clamp(28px, 5vw, 54px);
  background: #fff;
  box-shadow: var(--shadow);
}

.contact-card > div {
  max-width: 650px;
}

.contact-card .primary-link {
  flex: 0 0 auto;
}

.contact-card-rich {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: center;
}

.contact-info {
  max-width: 720px;
}

.contact-list {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 18px;
}

.contact-list dt {
  color: var(--muted);
  font-weight: 800;
}

.contact-list dd {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  font-weight: 800;
}

.contact-list a {
  color: var(--blue-deep);
}

.qr-card {
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.qr-card img {
  width: 100%;
  max-width: 230px;
  height: auto;
}

.qr-card strong {
  font-size: 20px;
}

.qr-card span {
  color: var(--muted);
  font-weight: 700;
}

.contact-phone {
  margin: 14px 0 0;
  color: var(--blue-deep) !important;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  line-height: 1.1;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(20px, 7vw, 96px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer strong {
  color: var(--ink);
}

@media (max-width: 900px) {
  .nav {
    position: fixed;
    top: 72px;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: #fff;
    color: var(--ink);
    box-shadow: var(--shadow);
  }

  .site-header.open .nav {
    display: flex;
  }

  .nav a {
    padding: 14px;
  }

  .menu-button {
    display: block;
  }

  .hero {
    min-height: 86vh;
  }

  .hero-shade {
    background: linear-gradient(90deg, rgba(10, 20, 31, 0.84), rgba(10, 20, 31, 0.54));
  }

  .stats-band,
  .position-grid,
  .service-grid,
  .rental-grid,
  .article-list.compact,
  .value-panel,
  .case-list,
  .mission-band {
    grid-template-columns: 1fr;
  }

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

  .product-tabs,
  .product-grid,
  .detail-hero,
  .contact-card-rich {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header {
    min-height: 64px;
    padding-inline: 14px;
  }

  .brand {
    min-width: 0;
  }

  .brand img {
    width: 142px;
  }

  .brand small {
    display: none;
  }

  .nav {
    top: 64px;
  }

  .hero {
    min-height: 82vh;
    padding: 96px 18px 52px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .stats-band,
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .capability-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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