:root {
  color-scheme: light;
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-soft: #eef4ff;
  --ink: #172033;
  --muted: #5d687a;
  --line: #d7dfec;
  --brand: #1f6feb;
  --brand-strong: #164ca8;
  --accent: #0f766e;
  --warning: #7c2d12;
  --shadow: 0 18px 50px rgba(23, 32, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--brand-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

a:hover {
  color: var(--brand);
}

.site-header,
.site-footer {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

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

.header-inner,
.footer-inner,
.main {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(31, 111, 235, 0.18);
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 15px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 650;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--brand-strong);
}

.main {
  padding: 56px 0 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 34px;
  align-items: center;
  margin-bottom: 44px;
}

.hero-panel,
.content,
.contact-card,
.feature-list,
.notice {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: 40px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: 0;
  color: var(--ink);
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(36px, 7vw, 62px);
}

.page-title {
  font-size: clamp(34px, 6vw, 52px);
}

h2 {
  margin: 40px 0 14px;
  font-size: 26px;
}

h3 {
  margin: 26px 0 10px;
  font-size: 20px;
}

p {
  margin: 0 0 18px;
}

ul {
  margin: 0 0 22px;
  padding-left: 24px;
}

li + li {
  margin-top: 8px;
}

.lead {
  color: var(--muted);
  font-size: 20px;
  max-width: 760px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--brand-strong);
  background: var(--brand);
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
}

.button.secondary {
  background: #ffffff;
  color: var(--brand-strong);
}

.app-card {
  background:
    linear-gradient(135deg, rgba(31, 111, 235, 0.14), rgba(15, 118, 110, 0.12)),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 360px;
  padding: 28px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.app-card img {
  width: 76px;
  height: 76px;
  border-radius: 18px;
  box-shadow: 0 16px 36px rgba(23, 32, 51, 0.18);
}

.app-card strong {
  display: block;
  margin-top: 24px;
  font-size: 28px;
  line-height: 1.2;
}

.app-card span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.feature-list {
  padding: 24px;
}

.feature-list h2 {
  margin-top: 0;
}

.feature-list ul {
  margin-bottom: 0;
}

.content {
  padding: 42px;
  max-width: 900px;
}

.content .date {
  color: var(--muted);
  font-weight: 650;
  margin-bottom: 28px;
}

.contact-card,
.notice {
  padding: 20px;
  margin: 24px 0 30px;
}

.contact-card {
  background: var(--surface-soft);
}

.notice {
  background: #fff7ed;
  border-color: #fed7aa;
  color: var(--warning);
  box-shadow: none;
}

.language-switch {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 26px;
}

.language-switch a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  text-decoration: none;
  font-weight: 750;
}

.footer-inner {
  min-height: 96px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 840px) {
  .header-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 18px 0;
  }

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

  .hero-panel,
  .content {
    padding: 28px;
  }

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

@media (max-width: 520px) {
  .header-inner,
  .footer-inner,
  .main {
    width: min(100% - 28px, 1080px);
  }

  .main {
    padding-top: 32px;
  }

  .hero-panel,
  .content,
  .app-card,
  .feature-list {
    padding: 22px;
  }

  .button {
    width: 100%;
  }
}