:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-text: #172033;
  --color-muted: #687187;
  --color-line: #e5e8ef;
  --color-accent: #6d5dfc;
  --color-accent-dark: #5143d9;
  --color-accent-soft: #eeecff;
  --shadow: 0 18px 50px rgba(37, 44, 75, 0.08);
  --radius: 20px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family:
    "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  line-height: 1.7;
}

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

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: 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: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  border-bottom: 1px solid transparent;
  background: rgba(247, 248, 250, 0.88);
  backdrop-filter: blur(14px);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--color-line);
  box-shadow: 0 8px 28px rgba(37, 44, 75, 0.05);
}

.nav-wrap {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 11px;
  color: #fff;
  background: linear-gradient(135deg, #8a7cff, var(--color-accent-dark));
  box-shadow: 0 8px 20px rgba(109, 93, 252, 0.25);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  color: var(--color-muted);
  font-size: 14px;
}

.site-nav a {
  transition: color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-accent);
}

.nav-lang {
  position: relative;
}

.nav-lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 6px 10px;
  border: 0;
  border-radius: 10px;
  color: var(--color-muted);
  background: transparent;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.nav-lang-trigger:hover,
.nav-lang-trigger:focus-visible {
  color: var(--color-text);
  background: rgba(23, 32, 51, 0.04);
}

.nav-lang-globe,
.nav-lang-chevron {
  flex-shrink: 0;
  opacity: 0.85;
}

.nav-lang-chevron {
  transition: transform 160ms ease;
}

.nav-lang.is-open .nav-lang-chevron {
  transform: rotate(180deg);
}

.nav-lang-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 30;
  min-width: 140px;
  padding: 6px 0;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: var(--color-surface);
  box-shadow: var(--shadow);
}

.nav-lang-dropdown[hidden] {
  display: none;
}

.nav-lang-option {
  display: block;
  width: 100%;
  padding: 9px 14px;
  border: 0;
  color: var(--color-muted);
  background: transparent;
  font-family: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.nav-lang-option:hover,
.nav-lang-option:focus-visible,
.nav-lang-option.is-active {
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.menu-button span:not(.sr-only) {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  border-radius: 2px;
  background: var(--color-text);
}

.hero {
  position: relative;
  display: grid;
  min-height: 720px;
  align-items: center;
  padding: 150px 0 90px;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 35%, rgba(109, 93, 252, 0.16), transparent 34%),
    linear-gradient(180deg, #fbfbfe 0%, var(--color-bg) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-label {
  margin: 0 0 14px;
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(44px, 7vw, 80px);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 28px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.25;
  letter-spacing: -0.03em;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.hero-description {
  max-width: 620px;
  margin-bottom: 34px;
  color: var(--color-muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 700;
  transition:
    transform 160ms ease,
    background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--color-accent);
  box-shadow: 0 12px 28px rgba(109, 93, 252, 0.24);
}

.button-primary:hover {
  background: var(--color-accent-dark);
}

.button-secondary {
  border-color: var(--color-line);
  background: rgba(255, 255, 255, 0.72);
}

.hero-decoration {
  position: absolute;
  top: 50%;
  right: -70px;
  width: 440px;
  height: 440px;
  transform: translateY(-50%) rotate(-10deg);
  border: 1px solid rgba(109, 93, 252, 0.18);
  border-radius: 50%;
}

.ray {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 460px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(109, 93, 252, 0.5), transparent);
  transform-origin: left center;
}

.ray-one {
  transform: rotate(-28deg);
}

.ray-two {
  transform: rotate(0deg);
}

.ray-three {
  transform: rotate(28deg);
}

.section {
  padding: 110px 0;
}

.section-muted {
  background: #eef0f5;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.4fr);
  gap: 80px;
}

.about-copy {
  color: var(--color-muted);
  font-size: 18px;
}

.about-copy p:last-child {
  margin-bottom: 0;
}

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

.service-card {
  min-height: 240px;
  padding: 28px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow);
  transition:
    transform 180ms ease,
    border-color 180ms ease;
}

.service-card:hover {
  border-color: rgba(109, 93, 252, 0.35);
  transform: translateY(-4px);
}

.service-number {
  display: inline-block;
  margin-bottom: 42px;
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 800;
}

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

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

.contact-card {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
  padding: 56px;
  border-radius: 28px;
  color: #fff;
  background:
    radial-gradient(circle at 85% 20%, rgba(143, 129, 255, 0.36), transparent 32%),
    #202438;
}

.contact-card > div > p:last-child {
  color: rgba(255, 255, 255, 0.68);
}

.company-details {
  margin: 0;
}

.company-details div {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 18px;
  padding: 17px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.company-details div:last-child {
  border-bottom: 0;
}

.company-details dt {
  color: rgba(255, 255, 255, 0.52);
  font-size: 13px;
}

.company-details dd {
  margin: 0;
  font-size: 14px;
}

.site-footer {
  padding: 28px 0;
  color: var(--color-muted);
  background: var(--color-surface);
  font-size: 13px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-content p {
  margin: 0;
}

@media (max-width: 860px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .split-layout,
  .contact-card {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-decoration {
    right: -260px;
    opacity: 0.7;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav-wrap {
    min-height: 64px;
  }

  .menu-button {
    display: block;
  }

  .nav-actions {
    gap: 8px;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    right: 14px;
    left: 14px;
    display: none;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--color-line);
    border-radius: 14px;
    background: var(--color-surface);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    padding: 11px 12px;
    border-radius: 8px;
  }

  .site-nav a:hover {
    background: var(--color-accent-soft);
  }

  .nav-lang-current {
    display: none;
  }

  .hero {
    min-height: 650px;
    padding-top: 120px;
  }

  h1 {
    font-size: 45px;
  }

  .hero-description,
  .about-copy {
    font-size: 16px;
  }

  .section {
    padding: 80px 0;
  }

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

  .service-card {
    min-height: auto;
  }

  .service-number {
    margin-bottom: 28px;
  }

  .contact-card {
    padding: 34px 24px;
    border-radius: 22px;
  }

  .company-details div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-content {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}