:root {
  --ink: #0b1730;
  --muted: #64748b;
  --line: #d7e3f1;
  --paper: #f4f8ff;
  --white: #ffffff;
  --teal: #0ea5e9;
  --green: #2563eb;
  --amber: #38bdf8;
  --navy: #0f2a5f;
  --shadow: 0 24px 60px rgba(15, 42, 95, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 76px;
  padding: 16px clamp(20px, 5vw, 72px);
  color: var(--navy);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(216, 224, 228, 0.78);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand img {
  display: block;
  width: 112px;
  height: 54px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 34px);
  color: rgba(22, 49, 66, 0.76);
  font-size: 0.94rem;
}

.nav-links a:hover,
.header-cta:hover {
  color: #082b6f;
}

.header-cta {
  padding: 11px 18px;
  color: #082b6f;
  border: 1px solid rgba(8, 43, 111, 0.24);
  border-radius: 8px;
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.language-toggle {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 4px;
  color: var(--navy);
  background: rgba(8, 43, 111, 0.06);
  border: 1px solid rgba(8, 43, 111, 0.12);
  border-radius: 999px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.language-toggle span {
  display: grid;
  place-items: center;
  min-width: 34px;
  min-height: 30px;
  padding: 0 8px;
  border-radius: 999px;
  color: rgba(22, 49, 66, 0.62);
  font-size: 0.82rem;
}

html[lang="zh-CN"] [data-lang-option="zh"],
html[lang="en"] [data-lang-option="en"] {
  color: #ffffff;
  background: #082b6f;
}

.hero {
  position: relative;
  min-height: 88vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 120px clamp(22px, 6vw, 86px) 72px;
  color: var(--white);
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(4, 15, 21, 0.92) 0%, rgba(8, 24, 31, 0.7) 41%, rgba(8, 24, 31, 0.08) 100%),
    linear-gradient(0deg, rgba(7, 19, 26, 0.7), transparent 38%);
}

.hero-content {
  position: relative;
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(2.8rem, 6vw, 5.8rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 630px;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
  line-height: 1.75;
}

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

.primary-button,
.secondary-button,
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 800;
}

.primary-button,
.contact-form button {
  color: #ffffff;
  background: #0b5fff;
  border: 1px solid #0b5fff;
}

.secondary-button {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.42);
}

section {
  padding: 96px clamp(22px, 6vw, 86px);
}

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

.section-heading {
  max-width: 760px;
  margin-bottom: 42px;
}

h2 {
  margin-bottom: 14px;
  color: var(--navy);
  font-size: clamp(2rem, 3.6vw, 3.4rem);
  line-height: 1.12;
}

h3 {
  color: var(--navy);
  font-size: 1.2rem;
}

.intro-grid,
.solution-grid,
.industry-grid,
.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.intro-grid article,
.solution-card,
.industry-grid article,
.timeline article {
  border-radius: 8px;
  background: var(--white);
  border: 1px solid var(--line);
}

.intro-grid article {
  display: grid;
  gap: 10px;
  min-height: 150px;
  padding: 24px;
}

.intro-grid strong {
  color: var(--navy);
  font-size: 1.14rem;
}

.intro-grid span,
.solution-card p,
.industry-grid p,
.timeline p,
.channel-content p,
.contact-copy p {
  color: var(--muted);
  line-height: 1.72;
}

.solution-card {
  min-height: 290px;
  padding: 28px;
  box-shadow: 0 14px 38px rgba(16, 32, 42, 0.06);
}

.card-number {
  display: inline-block;
  margin-bottom: 40px;
  color: var(--teal);
  font-weight: 800;
}

.channel-band {
  color: var(--white);
  background: linear-gradient(135deg, #06152f 0%, #0b3f91 48%, #0ea5e9 100%);
}

.channel-content {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1fr);
  gap: clamp(32px, 7vw, 96px);
  align-items: center;
}

.channel-content h2 {
  color: var(--white);
}

.channel-content p {
  max-width: 600px;
  color: rgba(255, 255, 255, 0.74);
}

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

.channel-list span {
  padding: 18px 20px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-weight: 800;
}

.industry-grid article,
.timeline article {
  padding: 26px;
}

.timeline article {
  position: relative;
  background: transparent;
}

.timeline span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 22px;
  color: var(--white);
  background: var(--green);
  border-radius: 999px;
  font-weight: 800;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding-top: 0;
  padding-bottom: 0;
  background: var(--line);
}

.metrics div {
  display: grid;
  gap: 10px;
  padding: 48px 28px;
  text-align: center;
  background: #eef6ff;
}

.metrics strong {
  color: var(--teal);
  font-size: clamp(2.4rem, 5vw, 4rem);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 560px);
  gap: clamp(34px, 8vw, 110px);
  align-items: start;
  background: var(--white);
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--navy);
  font-size: 0.92rem;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 12px 14px;
  color: var(--ink);
  background: #fbfdff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

textarea {
  min-height: 118px;
  resize: vertical;
}

.site-footer {
  display: grid;
  gap: 20px;
  padding: 30px clamp(22px, 6vw, 86px);
  color: rgba(255, 255, 255, 0.76);
  background: #06152f;
  font-size: 0.92rem;
}

.footer-main,
.footer-legal {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.footer-legal {
  justify-content: flex-start;
  flex-wrap: wrap;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.84rem;
}

.footer-legal a:hover {
  color: var(--white);
}

.policy-page {
  background: #f4f8ff;
}

.policy-main {
  min-height: 100vh;
  padding: 132px clamp(22px, 6vw, 86px) 88px;
}

.policy-document {
  max-width: 920px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 58px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 46px rgba(16, 32, 42, 0.08);
}

.policy-document h1 {
  margin-bottom: 18px;
  color: #082b6f;
  font-size: clamp(2.2rem, 4vw, 3.8rem);
}

.policy-document h2 {
  margin-top: 34px;
  font-size: 1.35rem;
}

.policy-document p,
.policy-document li {
  color: var(--muted);
  line-height: 1.78;
}

.policy-document ul {
  padding-left: 1.2rem;
}

.policy-back {
  display: inline-flex;
  margin-bottom: 28px;
  color: #082b6f;
  font-weight: 800;
}

@media (max-width: 900px) {
  .site-header {
    position: absolute;
    flex-wrap: wrap;
    gap: 14px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 820px;
  }

  .intro-grid,
  .solution-grid,
  .industry-grid,
  .timeline,
  .metrics,
  .channel-content,
  .contact {
    grid-template-columns: 1fr;
  }

  .channel-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 14px 18px;
  }

  .header-cta {
    display: none;
  }

  .brand img {
    width: 96px;
    height: 46px;
  }

  .language-toggle span {
    min-width: 30px;
    min-height: 28px;
    padding: 0 6px;
  }

  .hero {
    min-height: 760px;
    padding: 150px 20px 52px;
  }

  .hero-actions a {
    width: 100%;
  }

  section {
    padding: 72px 20px;
  }

  .contact-form {
    padding: 20px;
  }

  .site-footer {
    gap: 18px;
  }

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