:root {
  --color-canvas: #f3f6fa;
  --color-surface: #ffffff;
  --color-surface-muted: #edf5f1;
  --color-text: #172236;
  --color-text-muted: #536176;
  --color-line: #cbd5e1;
  --color-brand: #13705a;
  --color-brand-strong: #0b4f40;
  --color-brand-soft: #e0f1eb;
  --color-focus: #13705a;
  --radius: 10px;
  --shadow: 0 18px 45px rgba(31, 57, 86, 0.1);
  --content-width: 1180px;
  --space-section: clamp(4rem, 7vw, 7rem);
  --font-sans: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Source Han Sans SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--color-canvas);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

button,
input,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  transform: translateY(-180%);
  border-radius: var(--radius);
  background: var(--color-text);
  color: var(--color-surface);
  padding: 0.65rem 1rem;
}

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

.container {
  width: min(calc(100% - 3rem), var(--content-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(203, 213, 225, 0.9);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 7px 22px rgba(31, 57, 86, 0.05);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  min-height: 72px;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-size: 1.12rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.brand-logo {
  display: block;
  width: 120px;
  height: 30px;
  object-fit: contain;
}

.site-nav {
  justify-self: end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  font-size: 0.94rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  border-bottom-color: var(--color-brand);
  color: var(--color-brand-strong);
}

.menu-toggle {
  display: none;
  justify-self: end;
  min-height: 42px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
}

.hero {
  display: grid;
  min-height: min(760px, calc(100dvh - 72px));
  align-items: center;
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.hero-grid,
.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(300px, 0.98fr);
  align-items: center;
  gap: clamp(2.5rem, 7vw, 6rem);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--color-brand);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  text-wrap: balance;
}

h1 {
  max-width: 12ch;
  font-size: clamp(2.55rem, 5vw, 4.7rem);
  letter-spacing: -0.045em;
}

h2 {
  font-size: clamp(1.9rem, 3vw, 3rem);
  letter-spacing: -0.025em;
}

h3 {
  font-size: 1.2rem;
}

.hero-copy {
  max-width: 620px;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 36rem;
  margin: 1.5rem 0 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-brand);
  border-radius: var(--radius);
  background: var(--color-brand);
  color: var(--color-surface);
  padding: 0.7rem 1.2rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 160ms ease, transform 160ms ease;
}

.button:hover {
  background: var(--color-brand-strong);
}

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

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

.button-secondary:hover {
  background: var(--color-brand-soft);
}

.hero-visual {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  padding: clamp(1rem, 3vw, 2rem);
  box-shadow: var(--shadow);
}

.section {
  padding-block: var(--space-section);
}

.section-white {
  background: var(--color-surface);
}

.section-muted {
  background: var(--color-surface-muted);
}

.section-heading {
  max-width: 720px;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-heading p,
.lead {
  max-width: 64ch;
  margin: 1rem 0 0;
  color: var(--color-text-muted);
}

.capability-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  border-top: 1px solid var(--color-line);
}

.capability-primary {
  grid-row: span 2;
  padding: clamp(1.5rem, 4vw, 3rem) clamp(1.5rem, 4vw, 3rem) clamp(1.5rem, 4vw, 3rem) 0;
}

.capability-item {
  border-left: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.capability-primary p,
.capability-item p,
.product-copy p,
.news-item p,
.principle p {
  margin: 0.75rem 0 0;
  color: var(--color-text-muted);
}

.feature-visual {
  border-radius: var(--radius);
  background: var(--color-brand-soft);
  padding: clamp(1rem, 4vw, 2.5rem);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--color-line);
}

.advantage {
  min-height: 170px;
  border-right: 1px solid var(--color-line);
  padding: 1.5rem;
}

.advantage:last-child {
  border-right: 0;
}

.advantage strong {
  display: block;
  color: var(--color-brand);
  font-size: 1.4rem;
}

.advantage span {
  display: block;
  margin-top: 0.6rem;
  color: var(--color-text-muted);
}

.news-list,
.timeline,
.principles,
.product-list,
.related-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-item,
.product-item,
.related-item {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  align-items: start;
  gap: 1.5rem;
  border-top: 1px solid var(--color-line);
  padding-block: 1.6rem;
}

.news-meta,
.article-meta,
.product-kicker {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.text-link {
  color: var(--color-brand-strong);
  font-weight: 700;
  white-space: nowrap;
}

.cta {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  border-radius: var(--radius);
  background: var(--color-brand);
  color: var(--color-surface);
  padding: clamp(2rem, 5vw, 4rem);
}

.cta h2 {
  max-width: 18ch;
}

.cta p {
  max-width: 55ch;
  margin: 0.8rem 0 0;
  color: #e7f0f9;
}

.cta .button {
  border-color: var(--color-surface);
  background: var(--color-surface);
  color: var(--color-brand-strong);
}

.page-hero {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.page-hero h1 {
  max-width: 15ch;
  font-size: clamp(2.4rem, 5vw, 4.2rem);
}

.page-hero .lead {
  font-size: 1.12rem;
}

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

.timeline li {
  border-top: 1px solid var(--color-line);
  padding: 1.5rem 1.5rem 0 0;
}

.timeline strong {
  display: block;
  color: var(--color-brand);
  font-size: 1.1rem;
}

.timeline p {
  margin: 0.5rem 0 0;
  color: var(--color-text-muted);
}

.principles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-line);
}

.principle {
  background: var(--color-surface);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.product-list {
  border-top: 1px solid var(--color-line);
}

.product-item {
  grid-template-columns: 120px 1fr 220px auto;
  align-items: center;
}

.product-thumb {
  border-radius: var(--radius);
  background: var(--color-brand-soft);
  padding: 0.7rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  padding: 0.25rem 0.6rem;
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

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

.spec-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.spec-table th,
.spec-table td {
  border-bottom: 1px solid var(--color-line);
  padding: 1rem 1.2rem;
  text-align: left;
}

.spec-table th {
  width: 30%;
  background: var(--color-surface-muted);
}

.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: 0;
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1px;
  background: var(--color-line);
}

.scenario {
  background: var(--color-surface);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.article {
  max-width: 780px;
  margin-inline: auto;
}

.article h2 {
  margin-top: 2.5rem;
  font-size: clamp(1.55rem, 2.5vw, 2rem);
}

.article p {
  color: var(--color-text-muted);
}

.article-back {
  display: inline-flex;
  margin-bottom: 2rem;
  color: var(--color-brand-strong);
  font-weight: 700;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(2rem, 7vw, 6rem);
}

.contact-list {
  display: grid;
  gap: 1.3rem;
  margin: 2rem 0 0;
}

.contact-list dt {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.contact-list dd {
  margin: 0.2rem 0 0;
  font-weight: 700;
}

.demo-note {
  border-left: 4px solid var(--color-brand);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--color-brand-soft);
  padding: 1rem 1.2rem;
  color: var(--color-brand-strong);
}

.steps {
  display: grid;
  gap: 1px;
  background: var(--color-line);
}

.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  background: var(--color-surface);
  padding: 1.3rem;
}

.step strong {
  color: var(--color-brand);
  font-size: 1.2rem;
}

.site-footer {
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
  padding-block: 3.5rem 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 2rem;
}

.footer-title {
  margin: 0 0 0.75rem;
  font-weight: 700;
}

.footer-copy,
.footer-links {
  color: var(--color-text-muted);
}

.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links li + li {
  margin-top: 0.35rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  border-top: 1px solid var(--color-line);
  padding-top: 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.reveal-ready [data-reveal] {
  animation: enter 420ms ease-out both;
}

@keyframes enter {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .container {
    width: min(calc(100% - 2.5rem), var(--content-width));
  }

  .hero-grid,
  .split-grid {
    gap: 2.5rem;
  }

  .advantage-grid {
    grid-template-columns: 1fr 1fr;
  }

  .advantage:nth-child(2) {
    border-right: 0;
  }

  .advantage:nth-child(-n + 2) {
    border-bottom: 1px solid var(--color-line);
  }

  .product-item {
    grid-template-columns: 100px 1fr auto;
  }

  .product-item .tag-list {
    display: none;
  }
}

@media (max-width: 768px) {
  .container {
    width: min(calc(100% - 2rem), var(--content-width));
  }

  .header-inner {
    grid-template-columns: 1fr auto;
    min-height: 64px;
    gap: 1rem;
  }

  .js .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    grid-column: 1 / -1;
    justify-self: stretch;
  }

  .js .site-nav {
    display: none;
  }

  .js .menu-open .site-nav {
    display: block;
  }

  .nav-list {
    display: grid;
    gap: 0;
    border-top: 1px solid var(--color-line);
    padding-block: 0.4rem 0.75rem;
  }

  .nav-link {
    width: 100%;
    border-bottom: 0;
    border-left: 2px solid transparent;
    padding-inline: 0.8rem;
  }

  .nav-link[aria-current="page"] {
    border-left-color: var(--color-brand);
    background: var(--color-brand-soft);
  }

  .hero {
    min-height: auto;
    padding-block: 3.5rem;
  }

  .hero-grid,
  .split-grid,
  .contact-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(2.35rem, 11vw, 3.5rem);
  }

  .capability-grid {
    grid-template-columns: 1fr;
  }

  .capability-primary {
    grid-row: auto;
    border-bottom: 1px solid var(--color-line);
    padding-right: 0;
  }

  .capability-item {
    border-left: 0;
    padding-inline: 0;
  }

  .cta {
    grid-template-columns: 1fr;
  }

  .timeline,
  .principles {
    grid-template-columns: 1fr;
  }

  .timeline li {
    padding-bottom: 1.5rem;
  }

  .news-item,
  .related-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .product-item {
    grid-template-columns: 86px 1fr;
  }

  .product-item .text-link {
    grid-column: 2;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .advantage {
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .advantage:last-child {
    border-bottom: 0;
  }

  .hero-actions,
  .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

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

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

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