:root {
  color-scheme: light dark;
  --surface: light-dark(rgba(255, 255, 255, 0.76), rgba(14, 21, 33, 0.72));
  --text: light-dark(#111827, #e8edf5);
  --muted: light-dark(#5b6472, #9ba9bb);
  --line: light-dark(rgba(95, 109, 132, 0.18), rgba(155, 169, 187, 0.16));
  --accent: light-dark(#0f4c81, #6fa7dc);
  --accent-strong: light-dark(#0a2f4f, #c8def4);
  --accent-glow: light-dark(rgba(43, 110, 167, 0.18), rgba(111, 167, 220, 0.16));
  --shadow: light-dark(0 24px 80px rgba(15, 23, 42, 0.08), 0 24px 80px rgba(0, 0, 0, 0.28));
  --page-bg:
    radial-gradient(circle at top left, rgba(214, 228, 243, 0.8), transparent 24%),
    radial-gradient(circle at 82% 12%, rgba(15, 76, 129, 0.12), transparent 18%),
    linear-gradient(180deg, #f7f9fc 0%, #eef2f7 45%, #f7f9fc 100%);
  --html-bg: light-dark(#f7f9fc, #09101b);
  --header-bg: light-dark(rgba(247, 249, 252, 0.82), rgba(9, 16, 27, 0.82));
  --hero-bg:
    radial-gradient(circle at 18% 18%, rgba(255, 255, 255, 0.96), transparent 24%),
    radial-gradient(circle at 84% 22%, var(--accent-glow), transparent 22%),
    linear-gradient(135deg, #fbfdff 0%, #eef4fb 42%, #e2ebf6 100%);
  --hero-overlay:
    linear-gradient(120deg, rgba(15, 76, 129, 0.04), transparent 32%),
    linear-gradient(180deg, transparent, rgba(15, 23, 42, 0.035));
  --hero-grid-line-1: rgba(255, 255, 255, 0.3);
  --hero-grid-line-2: rgba(255, 255, 255, 0.18);
  --footer-bg: light-dark(#07111f, #050b14);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--html-bg);
}

body {
  margin: 0;
  color: var(--text);
  font-family:
    "SF Pro Display",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    sans-serif;
  background: var(--page-bg);
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(20px, 1fr) minmax(0, var(--max-width)) minmax(20px, 1fr);
  padding: 0;
}

.site-header {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: subgrid;
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(95, 109, 132, 0.12);
}

.topbar {
  grid-column: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
  background: transparent;
  backdrop-filter: none;
}

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

.brand-name {
  margin: 0;
  font-size: 0.94rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

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

.lang-switch {
  cursor: pointer;
  display: inline-flex;
  padding: 1px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  user-select: none;
}

.lang-btn,
.primary-btn {
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.lang-btn {
  cursor: pointer;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: inherit;
  min-height: 28px;
  padding: 0 9px;
  font-size: 0.76rem;
  pointer-events: none;
}

.lang-btn.is-active {
  background: var(--accent);
  color: #fff;
}

.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #2d6ea7);
  border: 0;
}

.lang-btn:hover,
.primary-btn:hover {
  transform: translateY(-1px);
}

.hero-banner {
  grid-column: 1 / -1;
  position: relative;
  overflow: hidden;
  min-height: 60vh;
  padding-block: 80px;
  margin-block-end: 40px;
  border-radius: 0;
  display: flex;
  align-items: stretch;
  background: var(--hero-bg);
  box-shadow: inset 0 -1px 0 rgba(95, 109, 132, 0.12);
  border-bottom: 1px solid rgba(95, 109, 132, 0.14);
}

.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--hero-overlay);
  pointer-events: none;
}

.hero-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--hero-grid-line-1) 1px, transparent 1px),
    linear-gradient(var(--hero-grid-line-2) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(135deg, rgba(0, 0, 0, 0.12), transparent 52%);
  pointer-events: none;
}

.hero-copy {
  width: 100%;
  min-height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 52px 16px 48px;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.hero-copy::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -50px;
  width: 420px;
  height: 420px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(15, 76, 129, 0.1), transparent 66%);
  pointer-events: none;
}

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

h1 {
  margin: 0 0 18px;
  width: 100%;
  max-width: none;
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

h1 span {
  display: block;
}

h1 .accent {
  color: var(--accent-strong);
}

.hero-lead {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 18px 0;
  max-width: 100%;
  margin-bottom: 0;
  color: var(--muted);
  font-weight: 500;
}

.hero-lead span {
  display: inline-flex;
  align-items: center;
  font-size: 1rem;
  line-height: 1.8;
}

.hero-lead span+span {
  margin-left: 28px;
  padding-left: 28px;
  position: relative;
}

.hero-lead span+span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1px;
  height: 1.15em;
  background: rgba(15, 76, 129, 0.24);
  transform: translateY(-50%);
}

.info-card p,
.showcase-item p,
.contact-card p {
  color: var(--muted);
  line-height: 1.8;
}

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

.hero-actions {
  margin: 30px 0 0;
  justify-content: center;
}

.hero-actions .primary-btn {
  min-height: 32px;
  padding: 0 12px;
  font-size: 0.78rem;
  box-shadow: 0 14px 28px rgba(15, 76, 129, 0.18);
}

.topbar-cta {
  min-height: 30px;
  padding: 0 12px;
  font-size: 0.78rem;
  box-shadow: 0 10px 24px rgba(15, 76, 129, 0.14);
}

html.lang-en .hero-copy {
  align-items: flex-start;
  text-align: left;
}

html.lang-en h1 {
  max-width: 22ch;
}

html.lang-en .hero-lead {
  display: grid;
  justify-content: flex-start;
  justify-items: flex-start;
  gap: 12px;
  max-width: 44rem;
}

html.lang-en .hero-actions {
  justify-content: flex-start;
}

html.lang-en .hero-lead span {
  font-size: 1rem;
  line-height: 1.7;
}

html.lang-en .hero-lead span+span {
  margin-left: 0;
  padding-left: 18px;
}

html.lang-en .hero-lead span+span::before,
html.lang-en .hero-lead span:first-child::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(15, 76, 129, 0.55);
  transform: none;
}

html.lang-en .hero-lead span {
  position: relative;
  padding-left: 18px;
}

.section {
  grid-column: 2;
  padding: 32px 0;
}

main {
  grid-column: 2;
}

.section-heading {
  margin-bottom: 20px;
}

h2 {
  margin: 10px 0 0;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.14;
  letter-spacing: -0.05em;
}

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

.info-card,
.showcase-item,
.contact-card {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.info-card,
.showcase-item {
  padding: 24px;
  border-radius: var(--radius-lg);
  position: relative;
}

.info-card::before {
  content: "";
  position: absolute;
  left: 24px;
  right: 24px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
  opacity: 0.7;
}

.solution-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: light-dark(rgba(15, 76, 129, 0.08), rgba(111, 167, 220, 0.1));
}

.solution-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent-strong);
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.info-card h3,
.showcase-item h3 {
  display: block;
  margin: 18px 0 10px;
  font-size: 1.38rem;
  line-height: 1.2;
  letter-spacing: -0.04em;
  color: var(--text);
}

.showcase-list {
  display: grid;
  gap: 18px;
}

.contact-card {
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.site-footer {
  grid-column: 1 / -1;
  margin-top: 8px;
  padding: 28px 0;
  background: var(--footer-bg);
}

.site-footer .contact-card {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

.site-footer .contact-name,
.site-footer .contact-link,
.site-footer .contact-value {
  color: #fff;
}

.site-footer .contact-label {
  color: rgba(255, 255, 255, 0.64);
}

.site-footer .contact-avatar {
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: none;
}

.site-footer .contact-link:hover {
  color: rgba(255, 255, 255, 0.82);
}

.contact-profile {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.contact-avatar {
  width: 88px;
  height: 88px;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid rgba(95, 109, 132, 0.18);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.1);
}

.contact-details {
  flex: 1;
}

.contact-name {
  margin: 0 0 8px;
  font-size: 1.32rem;
  line-height: 1.15;
  letter-spacing: -0.04em;
  color: #000;
  font-weight: 600;
}

.contact-card .contact-name {
  color: #000;
}

.contact-list {
  display: grid;
  gap: 6px;
}

.contact-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  align-items: baseline;
  gap: 10px;
}

.contact-label {
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.6;
}

.contact-link {
  justify-self: start;
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
}

.contact-link:hover {
  color: var(--accent-strong);
}

.contact-value {
  color: var(--text);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
}

.site-footer .contact-card .contact-name {
  color: #fff;
}

@media (max-width: 980px) {
  .card-grid.three-up {
    grid-template-columns: 1fr;
  }

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

  .hero-copy {
    padding: 40px 20px 34px;
  }

  h1 {
    font-size: clamp(1.5rem, 6.2vw, 2.1rem);
  }

  .hero-lead {
    gap: 10px 0;
  }

  .hero-lead span {
    font-size: 0.95rem;
  }

  .hero-lead span+span {
    margin-left: 18px;
    padding-left: 18px;
  }

  html.lang-en h1 {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    width: 100%;
    justify-content: space-between;
  }

  .info-card,
  .showcase-item,
  .contact-card {
    padding: 22px;
  }

  .primary-btn {
    width: 100%;
  }

  .contact-profile {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact-item {
    grid-template-columns: 64px minmax(0, 1fr);
  }
}

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

  .lang-btn,
  .primary-btn {
    transition: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --page-bg:
      radial-gradient(circle at top left, rgba(33, 49, 73, 0.5), transparent 24%),
      radial-gradient(circle at 82% 12%, rgba(111, 167, 220, 0.08), transparent 18%),
      linear-gradient(180deg, #09101b 0%, #0c1522 45%, #0a111c 100%);
    --hero-bg:
      radial-gradient(circle at 18% 18%, rgba(27, 40, 59, 0.6), transparent 24%),
      radial-gradient(circle at 84% 22%, var(--accent-glow), transparent 22%),
      linear-gradient(135deg, #0b1320 0%, #101a29 42%, #0d1623 100%);
    --hero-overlay:
      linear-gradient(120deg, rgba(111, 167, 220, 0.05), transparent 32%),
      linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.16));
    --hero-grid-line-1: rgba(255, 255, 255, 0.05);
    --hero-grid-line-2: rgba(255, 255, 255, 0.03);
  }

  body::before {
    background:
      linear-gradient(rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.02)),
      linear-gradient(90deg, rgba(111, 167, 220, 0.035) 1px, transparent 1px),
      linear-gradient(rgba(111, 167, 220, 0.035) 1px, transparent 1px);
  }

  .lang-switch {
    background: rgba(15, 23, 36, 0.78);
  }

  .lang-btn.is-active {
    color: #07111f;
    background: var(--accent);
  }

  .info-card,
  .showcase-item {
    box-shadow: var(--shadow);
  }

  .hero-lead span+span::before {
    background: rgba(111, 167, 220, 0.28);
  }

  html.lang-en .hero-lead span+span::before,
  html.lang-en .hero-lead span:first-child::before {
    background: rgba(111, 167, 220, 0.62);
  }

  .contact-avatar {
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
  }

  .contact-card .contact-name {
    color: var(--text);
  }
}