:root {
  color-scheme: light dark;
  --color-bg: #f8fafc;
  --color-surface: rgba(255, 255, 255, 0.78);
  --color-surface-strong: #ffffff;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-line: rgba(15, 23, 42, 0.1);
  --color-primary: #0a84ff;
  --color-primary-strong: #2563eb;
  --color-cyan: #06b6d4;
  --color-violet: #8b5cf6;
  --color-dark: #08111f;
  --shadow-soft: 0 24px 70px rgba(15, 23, 42, 0.12);
  --shadow-card: 0 12px 34px rgba(15, 23, 42, 0.1);
  --radius: 8px;
  --container: min(1160px, calc(100% - 40px));
  --font-sans: Inter, "HarmonyOS Sans", MiSans, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: rgba(10, 132, 255, 0.22);
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 1000;
  transform: translateY(-140%);
  border-radius: var(--radius);
  background: var(--color-primary-strong);
  color: #fff;
  padding: 10px 14px;
  transition: transform 0.2s ease;
}

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

.container {
  width: var(--container);
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  border-color: var(--color-line);
  background: rgba(248, 250, 252, 0.82);
  backdrop-filter: blur(22px);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

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

.brand img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  object-fit: contain;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand strong {
  font-size: 15px;
  letter-spacing: 0;
}

.brand small {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  border-radius: var(--radius);
  color: rgba(15, 23, 42, 0.76);
  font-size: 14px;
  padding: 9px 13px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(10, 132, 255, 0.08);
  color: var(--color-primary-strong);
  outline: none;
}

.site-nav .nav-cta {
  margin-left: 8px;
  border: 1px solid rgba(10, 132, 255, 0.28);
  color: var(--color-primary-strong);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.section {
  padding: 112px 0;
  overflow: hidden;
}

.section-muted {
  background: linear-gradient(180deg, rgba(241, 245, 249, 0.72), rgba(248, 250, 252, 0));
}

.section-dark {
  background: #08111f;
  color: #f8fafc;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 880px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6.2vw, 82px);
  font-weight: 780;
  letter-spacing: 0;
  line-height: 1.05;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 760;
  letter-spacing: 0;
  line-height: 1.12;
}

h3 {
  font-size: 20px;
  line-height: 1.25;
}

.section-heading {
  max-width: 620px;
}

.section-heading.center {
  margin-inline: auto;
  text-align: center;
}

.section-heading p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 17px;
}

.section-dark .section-heading p:not(.eyebrow),
.section-dark .hero-subtitle {
  color: rgba(248, 250, 252, 0.72);
}

.hero {
  position: relative;
  min-height: 760px;
  padding: 170px 0 108px;
  isolation: isolate;
}

.hero::after {
  position: absolute;
  inset: auto 0 0;
  z-index: -1;
  height: 40%;
  content: "";
  background: linear-gradient(180deg, rgba(8, 17, 31, 0), #08111f);
}

.hero-canvas,
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-grid {
  opacity: 0.34;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.72) 52%, transparent 100%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 60px;
  align-items: center;
}

.hero-subtitle {
  max-width: 700px;
  margin-bottom: 34px;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 12px 20px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.btn-primary {
  background: #f8fafc;
  color: #0f172a;
  box-shadow: 0 16px 34px rgba(10, 132, 255, 0.22);
}

.contact-form .btn-primary {
  background: var(--color-primary-strong);
  color: #fff;
}

.btn-secondary {
  border-color: rgba(248, 250, 252, 0.22);
  background: rgba(248, 250, 252, 0.08);
  color: #f8fafc;
  backdrop-filter: blur(16px);
}

.hero-panel {
  border: 1px solid rgba(248, 250, 252, 0.14);
  border-radius: var(--radius);
  background: rgba(8, 17, 31, 0.52);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(24px);
  padding: 22px;
}

.panel-top {
  display: flex;
  justify-content: space-between;
  margin-bottom: 24px;
  color: rgba(248, 250, 252, 0.68);
  font-size: 13px;
}

.panel-top b {
  color: #fff;
}

.matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.matrix span {
  min-height: 74px;
  border: 1px solid rgba(248, 250, 252, 0.12);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(10, 132, 255, 0.14), rgba(6, 182, 212, 0.05)),
    rgba(248, 250, 252, 0.06);
  color: rgba(248, 250, 252, 0.9);
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 700;
}

.signal-card {
  display: flex;
  gap: 12px;
  margin-top: 18px;
  border-top: 1px solid rgba(248, 250, 252, 0.1);
  padding-top: 18px;
}

.signal-dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  margin-top: 8px;
  border-radius: 50%;
  background: #06b6d4;
  box-shadow: 0 0 0 7px rgba(6, 182, 212, 0.12);
}

.signal-card p {
  margin: 0;
  color: rgba(248, 250, 252, 0.72);
  font-size: 14px;
}

.two-column,
.tech-layout,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 70px;
  align-items: start;
}

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

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 30px;
}

.principles article,
.service-card,
.tech-matrix article,
.stat-card,
.contact-form {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px);
}

.principles article {
  padding: 22px;
}

.principles h3,
.principles p {
  margin-bottom: 10px;
}

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

.principles ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.principles li {
  border-radius: 999px;
  background: rgba(10, 132, 255, 0.09);
  color: var(--color-primary-strong);
  font-size: 13px;
  padding: 4px 10px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 44px;
}

.service-card {
  min-height: 230px;
  padding: 26px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(10, 132, 255, 0.28);
  box-shadow: var(--shadow-soft);
}

.card-icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 28px;
  border-radius: var(--radius);
  background: #0f172a;
  color: #f8fafc;
  font-weight: 800;
}

.service-card h3 {
  margin-bottom: 12px;
}

.service-card p {
  margin: 0;
  color: var(--color-muted);
}

.tech-layout {
  grid-template-columns: minmax(280px, 0.52fr) minmax(0, 1fr);
  align-items: center;
}

.tech-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tech-matrix article {
  padding: 22px;
}

.tech-matrix article:last-child {
  grid-column: 1 / -1;
}

.tech-matrix h3 {
  margin-bottom: 18px;
  font-size: 17px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tags span {
  border: 1px solid rgba(10, 132, 255, 0.15);
  border-radius: var(--radius);
  background: rgba(10, 132, 255, 0.07);
  color: #1e293b;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 11px;
}

.solution-list {
  display: grid;
  gap: 1px;
  margin-top: 48px;
  border: 1px solid rgba(248, 250, 252, 0.12);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(248, 250, 252, 0.12);
}

.solution-item {
  display: grid;
  grid-template-columns: 130px minmax(180px, 0.45fr) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  min-height: 104px;
  background: rgba(8, 17, 31, 0.78);
  padding: 24px;
}

.solution-item span {
  color: #06b6d4;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.solution-item h3,
.solution-item p {
  margin: 0;
}

.solution-item p {
  color: rgba(248, 250, 252, 0.68);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 44px;
}

.stat-card {
  padding: 28px;
  min-height: 190px;
}

.stat-card strong {
  display: inline-block;
  font-size: clamp(48px, 6vw, 72px);
  line-height: 1;
  letter-spacing: 0;
}

.stat-card span {
  color: var(--color-cyan);
  font-size: 24px;
  font-weight: 800;
}

.stat-card p {
  margin: 24px 0 0;
  color: var(--color-muted);
  font-weight: 700;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 44px 0 0;
  list-style: none;
}

.process-list li {
  position: relative;
  min-height: 132px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface-strong);
  padding: 22px;
  box-shadow: var(--shadow-card);
  font-weight: 800;
}

.process-list li:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -10px;
  z-index: 1;
  width: 20px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, var(--color-primary), var(--color-cyan));
}

.process-list span {
  display: block;
  margin-bottom: 34px;
  color: var(--color-primary-strong);
  font-size: 13px;
}

.contact-layout {
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1fr);
  align-items: stretch;
}

.contact-info address {
  margin-top: 30px;
  font-style: normal;
}

.contact-info address p {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  margin-bottom: 18px;
  color: var(--color-muted);
}

.contact-info strong {
  color: var(--color-text);
}

.contact-info a {
  color: var(--color-primary-strong);
  font-weight: 700;
}

.contact-form {
  padding: 30px;
}

.form-row {
  margin-bottom: 18px;
}

label {
  display: block;
  margin-bottom: 7px;
  color: var(--color-text);
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  color: var(--color-text);
  padding: 13px 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  border-color: rgba(10, 132, 255, 0.62);
  box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.12);
  outline: none;
}

.form-row small {
  display: block;
  min-height: 20px;
  margin-top: 4px;
  color: #dc2626;
  font-size: 12px;
}

.form-row.is-invalid input,
.form-row.is-invalid textarea {
  border-color: rgba(220, 38, 38, 0.7);
}

.form-note {
  margin: 14px 0 0;
  color: var(--color-muted);
  font-size: 13px;
}

.form-note.is-success {
  color: #047857;
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 28px 0;
}

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

.footer-inner p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-inner a {
  color: var(--color-muted);
  font-size: 14px;
}

.footer-inner a:hover {
  color: var(--color-primary-strong);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0a101c;
    --color-surface: rgba(15, 23, 42, 0.72);
    --color-surface-strong: #111827;
    --color-text: #f8fafc;
    --color-muted: #94a3b8;
    --color-line: rgba(248, 250, 252, 0.12);
    --shadow-soft: 0 24px 70px rgba(0, 0, 0, 0.28);
    --shadow-card: 0 12px 34px rgba(0, 0, 0, 0.22);
  }

  .site-header.is-scrolled {
    background: rgba(10, 16, 28, 0.84);
  }

  .site-nav a {
    color: rgba(248, 250, 252, 0.74);
  }

  .section-muted {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.56), rgba(10, 16, 28, 0));
  }

  .tags span {
    color: #e2e8f0;
  }

  input,
  textarea {
    background: rgba(15, 23, 42, 0.76);
  }

  .card-icon {
    background: #f8fafc;
    color: #0f172a;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 980px) {
  .hero-inner,
  .two-column,
  .tech-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .hero {
    min-height: auto;
    padding-top: 140px;
  }

  .hero-panel {
    max-width: 520px;
  }

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

  .process-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .process-list li:not(:last-child)::after {
    display: none;
  }

  .solution-item {
    grid-template-columns: 110px 1fr;
  }

  .solution-item p {
    grid-column: 2;
  }
}

@media (max-width: 760px) {
  :root {
    --container: min(100% - 28px, 1160px);
  }

  .header-inner {
    height: 66px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: 66px 14px auto;
    display: grid;
    gap: 6px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background: var(--color-surface-strong);
    box-shadow: var(--shadow-soft);
    padding: 10px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 12px;
  }

  .site-nav .nav-cta {
    margin-left: 0;
  }

  .section {
    padding: 78px 0;
  }

  .hero {
    padding: 118px 0 74px;
  }

  h1 {
    font-size: 42px;
  }

  .hero-actions,
  .footer-inner {
    align-items: stretch;
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .principles,
  .card-grid,
  .tech-matrix,
  .stats-grid,
  .process-list {
    grid-template-columns: 1fr;
  }

  .solution-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .solution-item p {
    grid-column: auto;
  }

  .contact-info address p {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (max-width: 430px) {
  .brand strong {
    font-size: 14px;
  }

  .brand small {
    display: none;
  }

  h1 {
    font-size: 36px;
  }

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