@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #F8FAFC;
  --surface: rgba(255, 255, 255, 0.85);
  --surface-strong: #ffffff;
  --line: #E2E8F0;
  --text: #0F172A;
  --muted: #475569;
  --brand: #2563EB;
  --brand-deep: #1D4ED8;
  --accent: #3B82F6;
  --shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.08);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.06), transparent 32%),
    radial-gradient(circle at top right, rgba(59, 130, 246, 0.04), transparent 28%),
    linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 100%);
}

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

.shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  box-shadow: var(--shadow);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
}

.nav a,
.lang-switch button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  font: inherit;
  cursor: pointer;
}

.lang-switch {
  display: flex;
  gap: 8px;
}

.lang-switch button.active {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.9fr);
  gap: 28px;
  padding: 44px 0 28px;
  align-items: stretch;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-copy,
.hero-aside,
.section,
.legal-card {
  padding: 28px;
}

.eyebrow {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--brand);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
}

h1 {
  margin-top: 16px;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
}

.lead {
  margin: 18px 0 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
}

.button.primary {
  background: var(--brand);
  color: #fff;
  transition: background 0.2s ease, transform 0.2s ease;
}

.button.primary:hover {
  background: var(--brand-deep);
}

.button.secondary {
  border-color: var(--line);
  background: #fff;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.button.secondary:hover {
  background: #F8FAFC;
  border-color: #CBD5E1;
}

.stat-grid,
.feature-grid,
.support-grid,
.contact-grid,
.download-list {
  display: grid;
  gap: 24px;
}

.stat-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.75);
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 1.2rem;
  color: var(--brand);
  margin-bottom: 8px;
}

.section-stack {
  display: flex;
  flex-direction: column;
  gap: 64px;
  padding-bottom: 80px;
}

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

.feature-card,
.support-card,
.download-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover,
.support-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.feature-card h3::before,
.support-card h3::before {
  content: "";
  display: block;
  width: 32px;
  height: 32px;
  margin-bottom: 12px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 8px;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.2);
}

.feature-card p,
.support-card p,
.download-card p,
.legal-card p,
.legal-card li {
  color: var(--muted);
  line-height: 1.7;
}

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

.contact-grid,
.legal-grid {
  display: grid;
  gap: 16px;
}

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

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

.legal-card ul {
  margin: 10px 0 0;
  padding-left: 18px;
}

.download-list {
  margin-top: 20px;
}

.download-card {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer {
  padding: 8px 0 36px;
  color: var(--muted);
}

.footer-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(223, 210, 188, 0.9);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  color: var(--brand-deep);
}

[data-lang] {
  display: none;
}

body.lang-en [data-lang="en"],
body.lang-zh [data-lang="zh"],
body.lang-ms [data-lang="ms"] {
  display: block;
}

body.lang-en [data-lang-inline="en"],
body.lang-zh [data-lang-inline="zh"],
body.lang-ms [data-lang-inline="ms"] {
  display: inline;
}

[data-lang-inline] {
  display: none;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 80px 24px;
  gap: 48px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
}

.stats-banner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 64px;
}

@media (max-width: 900px) {
  .hero,
  .feature-grid,
  .support-grid,
  .contact-grid,
  .legal-grid {
    grid-template-columns: 1fr;
  }

  .download-card,
  .topbar-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    justify-content: flex-start;
  }
}