:root {
  --ink: #0a1733;
  --muted: #60708d;
  --paper: #f6f9ff;
  --white: #ffffff;
  --blue: #2367ff;
  --cyan: #29d3ff;
  --violet: #7957ff;
  --line: rgba(20, 49, 102, 0.12);
  --shadow: 0 24px 70px rgba(24, 66, 146, 0.14);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.65;
}

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

button,
input,
textarea {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(6, 20, 50, 0.9);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--cyan), var(--blue) 55%, var(--violet));
  box-shadow: 0 8px 24px rgba(35, 103, 255, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
}

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

.lang-toggle,
.menu-toggle {
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  padding: 9px 14px;
  cursor: pointer;
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 680px;
  display: grid;
  align-items: center;
  color: var(--white);
  background:
    radial-gradient(circle at 82% 22%, rgba(41, 211, 255, 0.22), transparent 28%),
    radial-gradient(circle at 60% 95%, rgba(121, 87, 255, 0.28), transparent 35%),
    linear-gradient(135deg, #061432, #092762 58%, #0c3983);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to right, transparent, black 45%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 70px;
  padding: 100px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: currentColor;
}

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

h1 {
  margin: 24px 0;
  font-size: clamp(48px, 6vw, 78px);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h3 {
  font-size: 21px;
  line-height: 1.3;
}

.hero-copy {
  max-width: 650px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border: 0;
  border-radius: 14px;
  font-weight: 750;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.button-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 14px 32px rgba(35, 103, 255, 0.32);
}

.button-light {
  color: var(--ink);
  background: var(--white);
}

.button-ghost {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.hero-visual {
  position: relative;
  min-height: 440px;
}

.orb {
  position: absolute;
  inset: 35px 5% 20px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 32%, rgba(255, 255, 255, 0.82), transparent 8%),
    radial-gradient(circle at 50% 50%, rgba(41, 211, 255, 0.46), rgba(35, 103, 255, 0.12) 42%, transparent 68%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 0 80px rgba(255, 255, 255, 0.08), 0 0 100px rgba(41, 211, 255, 0.18);
  animation: float 6s ease-in-out infinite;
}

.orbit {
  position: absolute;
  inset: 14%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  transform: rotate(-24deg);
}

.orbit::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  top: 18%;
  right: 6%;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 24px var(--cyan);
}

.data-card {
  position: absolute;
  width: 190px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 18px;
  color: var(--white);
  background: rgba(7, 30, 70, 0.62);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
}

.data-card strong {
  display: block;
  margin-top: 6px;
  font-size: 27px;
}

.data-card span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.data-card.one {
  top: 38px;
  right: 0;
}

.data-card.two {
  bottom: 32px;
  left: 0;
}

@keyframes float {
  50% {
    transform: translateY(-12px) scale(1.02);
  }
}

.section {
  padding: 104px 0;
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 52px;
}

.section-head p,
.muted {
  color: var(--muted);
}

.grid-3,
.grid-4,
.process-grid,
.footer-grid {
  display: grid;
  gap: 24px;
}

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

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

.card {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 12px 36px rgba(22, 59, 120, 0.06);
}

.card-icon {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  border-radius: 16px;
  color: var(--blue);
  background: #edf3ff;
  font-size: 22px;
  font-weight: 900;
}

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

.feature-band {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  align-items: center;
}

.visual-panel {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border-radius: 30px;
  background:
    radial-gradient(circle at 68% 28%, rgba(41, 211, 255, 0.45), transparent 26%),
    linear-gradient(145deg, #071b42, #1454bd);
  box-shadow: var(--shadow);
}

.visual-panel::before,
.visual-panel::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
}

.visual-panel::before {
  width: 280px;
  height: 280px;
  top: 60px;
  left: 70px;
}

.visual-panel::after {
  width: 160px;
  height: 160px;
  top: 120px;
  left: 130px;
}

.panel-label {
  position: absolute;
  left: 34px;
  bottom: 30px;
  color: rgba(255, 255, 255, 0.72);
}

.panel-label strong {
  display: block;
  color: var(--white);
  font-size: 30px;
}

.check-list {
  display: grid;
  gap: 18px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 32px;
  color: var(--muted);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--blue);
  font-weight: 900;
}

.page-hero {
  padding: 104px 0 90px;
  color: var(--white);
  background:
    radial-gradient(circle at 80% 30%, rgba(41, 211, 255, 0.2), transparent 28%),
    linear-gradient(135deg, #061432, #0b357a);
}

.page-hero h1 {
  max-width: 850px;
  font-size: clamp(44px, 6vw, 68px);
}

.page-hero p {
  max-width: 680px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
}

.process-grid {
  grid-template-columns: repeat(4, 1fr);
  counter-reset: process;
}

.process-item {
  counter-increment: process;
  padding-top: 20px;
  border-top: 2px solid var(--line);
}

.process-item::before {
  content: "0" counter(process);
  display: block;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 900;
}

.cta {
  padding: 54px;
  border-radius: 30px;
  color: var(--white);
  background:
    radial-gradient(circle at 85% 20%, rgba(41, 211, 255, 0.3), transparent 26%),
    linear-gradient(135deg, #0a2455, #1555bd);
  box-shadow: var(--shadow);
}

.cta p {
  color: rgba(255, 255, 255, 0.72);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
}

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

.contact-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.contact-item span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 13px;
}

.form-card {
  padding: 36px;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.field label {
  font-size: 14px;
  font-weight: 700;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 15px;
  color: var(--ink);
  background: #fbfcff;
  outline: none;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(35, 103, 255, 0.1);
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  margin-top: 15px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  padding: 70px 0 28px;
  color: rgba(255, 255, 255, 0.7);
  background: #061432;
}

.footer-grid {
  grid-template-columns: 1.4fr 0.8fr 0.8fr;
  padding-bottom: 48px;
}

.footer-grid h3 {
  color: var(--white);
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
}

[data-en]::after {
  content: attr(data-en);
  display: block;
  margin-top: 3px;
  color: currentColor;
  opacity: 0.56;
  font-size: 0.62em;
  font-weight: 500;
  letter-spacing: 0.02em;
}

body.lang-en [data-en] {
  font-size: 0;
}

body.lang-en [data-en]::after {
  margin: 0;
  opacity: 1;
  font-size: initial;
  font-weight: inherit;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 68px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    background: #071a40;
  }

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

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

  .hero-grid,
  .feature-band,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 360px;
  }

  .grid-3,
  .grid-4,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .shell {
    width: min(100% - 28px, 1180px);
  }

  .brand {
    font-size: 12px;
  }

  .hero-grid,
  .section {
    padding: 72px 0;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    display: none;
  }

  .grid-3,
  .grid-4,
  .process-grid,
  .field-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .card,
  .form-card {
    padding: 24px;
  }

  .cta {
    padding: 34px 24px;
  }

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