:root {
  --ink: #1e2529;
  --muted: #5f6d73;
  --line: #d9e1e4;
  --paper: #ffffff;
  --soft: #f5f8f7;
  --teal: #1c6b67;
  --green: #648c3f;
  --gold: #b48232;
  --steel: #3f5962;
  --danger: #8b4b3c;
  --shadow: 0 18px 42px rgba(30, 37, 41, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

[id] {
  scroll-margin-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.68;
  overflow-x: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(217, 225, 228, 0.92);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 74px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
  min-inline-size: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.brand strong {
  display: block;
  font-size: 18px;
  line-height: 1.25;
}

.brand span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.3;
  min-inline-size: 0;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-size: 24px;
  cursor: pointer;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  font-size: 14px;
}

.site-nav a {
  color: #2d383d;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--teal);
}

.site-nav .nav-cta,
.site-nav .nav-cta:hover,
.site-nav .nav-cta.active {
  color: #fff;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid var(--teal);
  background: var(--teal);
  color: #fff;
  font-weight: 700;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  border: 1px solid var(--line);
  padding: 0 8px;
  color: var(--muted);
  font-size: 13px;
}

.lang-switch a {
  color: var(--muted);
  padding: 0;
}

.lang-switch a.active {
  color: var(--teal);
  font-weight: 800;
}

.lang-switch span {
  color: var(--line);
}

.button.secondary {
  background: transparent;
  color: var(--teal);
}

.hero {
  min-height: 68vh;
  display: grid;
  align-items: center;
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(15, 34, 38, 0.9), rgba(15, 34, 38, 0.62), rgba(15, 34, 38, 0.24)),
    url("../images/products/608_01.jpg") center right / cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.24);
}

.hero-inner,
.section-inner,
.page-hero-inner,
.footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero-copy {
  width: min(760px, 100%);
  padding: 56px 0;
}

.eyebrow {
  color: var(--gold);
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 12px;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.2;
  margin: 0;
}

h1 {
  font-size: clamp(34px, 5vw, 58px);
}

h2 {
  font-size: clamp(27px, 4vw, 40px);
}

h3 {
  font-size: 21px;
}

p {
  margin: 0;
}

.hero p {
  margin-top: 20px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
}

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

.hero .button.secondary {
  border-color: rgba(255, 255, 255, 0.74);
  color: #fff;
}

.stats-strip {
  background: var(--ink);
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
}

.stat {
  padding: 22px 24px;
  background: #263135;
}

.stat strong {
  display: block;
  font-size: 25px;
}

.stat span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.section {
  padding: 74px 0;
}

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

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head p {
  max-width: 620px;
  color: var(--muted);
}

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

.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 10px 30px rgba(30, 37, 41, 0.06);
  height: 100%;
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #eef3f1;
}

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

.product-card-body p {
  margin-top: 10px;
  color: var(--muted);
  min-height: 84px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  min-height: 28px;
}

.tag-list span,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: #314047;
  font-size: 13px;
}

.product-card .button {
  margin-top: auto;
  width: 100%;
}

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

.capability {
  border-top: 4px solid var(--green);
  padding: 22px 0 0;
}

.capability p {
  margin-top: 10px;
  color: var(--muted);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--paper);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #eef3f1;
  color: #263135;
}

tr:last-child td {
  border-bottom: 0;
}

.page-hero {
  background: var(--soft);
  border-bottom: 1px solid var(--line);
}

.page-hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 38px;
  align-items: center;
  padding: 58px 0;
}

.page-hero p {
  margin-top: 18px;
  color: var(--muted);
  font-size: 17px;
}

.page-hero img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.detail-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 34px;
}

.detail-main > section + section {
  margin-top: 48px;
}

.copy-block p + p {
  margin-top: 16px;
}

.copy-block p,
.lead {
  color: var(--muted);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.feature-list li {
  border-left: 4px solid var(--green);
  background: var(--soft);
  padding: 14px 16px;
  list-style: none;
}

.feature-list ul {
  padding: 0;
  margin: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.faq-item {
  border: 1px solid var(--line);
  background: var(--paper);
}

.faq-item button {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 18px 20px;
  color: var(--ink);
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.faq-item div {
  display: none;
  padding: 0 20px 20px;
  color: var(--muted);
}

.faq-item.open div {
  display: block;
}

.side-panel {
  position: sticky;
  top: 98px;
  align-self: start;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 24px;
  box-shadow: 0 10px 28px rgba(30, 37, 41, 0.07);
}

.side-panel h3 + p,
.side-panel p + p {
  margin-top: 10px;
}

.side-panel p {
  color: var(--muted);
}

.contact-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.contact-list li {
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.contact-list strong {
  display: block;
  color: var(--ink);
}

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

.notice {
  border-left: 4px solid var(--gold);
  background: #fff8eb;
  padding: 16px 18px;
  color: #594021;
}

.download-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.download-item {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 18px;
}

.download-item strong {
  display: block;
}

.download-item span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.model-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(138px, 1fr));
  gap: 10px;
}

.model-link-grid a {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 16px;
  min-height: 112px;
}

.model-link-grid a:hover {
  border-color: var(--teal);
  box-shadow: 0 10px 24px rgba(30, 37, 41, 0.08);
}

.model-link-grid strong {
  display: block;
  color: var(--teal);
  font-size: 22px;
  line-height: 1.15;
}

.model-link-grid span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
}

.resource-grid,
.checklist-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.resource-card,
.checklist-grid > div {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 20px;
}

.resource-card h3 {
  margin-top: 14px;
}

.resource-card p {
  margin-top: 10px;
  color: var(--muted);
}

.resource-card ul {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
}

.resource-card li + li {
  margin-top: 8px;
}

.checklist-grid {
  grid-template-columns: repeat(2, 1fr);
  margin-top: 18px;
}

.checklist-grid strong {
  display: block;
  color: var(--ink);
}

.checklist-grid span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.process-list div {
  border-top: 4px solid var(--teal);
  background: var(--soft);
  padding: 16px;
}

.process-list strong {
  display: block;
  color: var(--teal);
  font-size: 24px;
  line-height: 1;
}

.process-list span {
  display: block;
  margin-top: 10px;
  color: var(--steel);
  font-weight: 700;
}

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

.article-card {
  display: flex;
  flex-direction: column;
  min-height: 210px;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 22px;
}

.article-card p {
  margin-top: 10px;
  color: var(--muted);
}

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

.article-body {
  max-width: 860px;
}

.article-body h2 {
  margin-top: 42px;
  font-size: 28px;
}

.article-body p,
.article-body li {
  color: var(--muted);
}

.article-body p {
  margin-top: 14px;
}

.article-body ul {
  margin: 14px 0 0;
  padding-left: 22px;
}

.article-note {
  margin-top: 24px;
  border-left: 4px solid var(--teal);
  background: var(--soft);
  padding: 16px 18px;
  color: var(--steel);
}

.site-footer {
  background: var(--ink);
  color: #fff;
  padding: 40px 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
}

.footer-grid {
  grid-template-columns: 1.2fr 0.9fr 0.9fr 1.1fr;
  align-items: start;
}

.site-footer h4 {
  margin: 0;
  color: #fff;
  font-size: 15px;
}

.site-footer p,
.site-footer li,
.site-footer a {
  color: rgba(255, 255, 255, 0.78);
}

.site-footer a:hover {
  color: #fff;
}

.site-footer ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.site-footer li + li {
  margin-top: 6px;
}

.footer-icp {
  grid-column: 1 / -1;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
}

.footer-icp a {
  font-size: 13px;
}

.breadcrumb {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 12px;
}

.breadcrumb a {
  color: var(--teal);
}

@media (max-width: 1180px) {
  .nav-wrap {
    padding-right: 58px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 50%;
    right: 0;
    flex: 0 0 42px;
    transform: translateY(-50%);
  }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 74px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - 74px);
    overflow-y: auto;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
  }

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

  .site-nav a {
    padding: 14px 24px;
    border-top: 1px solid var(--line);
  }

  .nav-cta {
    margin: 12px 24px 18px;
  }

  .lang-switch {
    margin: 12px 24px;
    justify-content: center;
  }

  .lang-switch a {
    border: 0;
    padding: 0;
  }

  .stats-grid,
  .product-grid,
  .article-grid,
  .capability-grid,
  .download-list,
  .model-link-grid,
  .resource-grid,
  .checklist-grid,
  .process-list,
  .footer-inner,
  .page-hero-inner,
  .detail-layout {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
  }

  .section-head p {
    margin-top: 12px;
  }

  .side-panel {
    position: static;
  }

  .product-card-body p,
  .tag-list,
  .article-card {
    min-height: 0;
  }
}

@media (max-width: 620px) {
  .nav-wrap,
  .hero-inner,
  .section-inner,
  .page-hero-inner,
  .footer-inner {
    width: min(100% - 24px, 1180px);
  }

  .brand {
    flex: 1 1 auto;
    min-width: 0;
    max-width: calc(100% - 58px);
  }

  .brand img {
    flex: 0 0 38px;
    width: 38px;
    height: 38px;
  }

  .brand strong {
    font-size: 16px;
  }

  .brand span span {
    max-width: min(260px, calc(100vw - 124px));
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 11px;
  }

  .nav-toggle {
    flex: 0 0 42px;
  }

  .page-hero-inner {
    gap: 24px;
    padding: 42px 0;
  }

  .page-hero img {
    width: 100%;
    max-width: 100%;
  }

  .hero {
    min-height: 72vh;
    background:
      linear-gradient(180deg, rgba(15, 34, 38, 0.9), rgba(15, 34, 38, 0.68)),
      url("../images/products/608_01.jpg") center / cover no-repeat;
  }

  .hero p,
  .page-hero p {
    font-size: 16px;
  }

  h1 {
    font-size: 30px;
  }

  .section {
    padding: 52px 0;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}