:root {
  color-scheme: light dark;
  --bg: #eef3f8;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-strong: rgba(255, 255, 255, 0.92);
  --line: rgba(17, 24, 39, 0.12);
  --text: #162033;
  --muted: #5c6676;
  --accent: #0e5bd8;
  --accent-strong: #0b49ad;
  --accent-soft: rgba(14, 91, 216, 0.1);
  --success: #2f9d63;
  --shadow: 0 24px 60px rgba(14, 24, 43, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "SF Pro Display", "SF Pro Text", "PingFang SC", "Hiragino Sans",
    "Apple SD Gothic Neo", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(14, 91, 216, 0.18), transparent 32%),
    radial-gradient(circle at top right, rgba(48, 173, 110, 0.14), transparent 28%),
    linear-gradient(180deg, #f7fbff 0%, var(--bg) 100%);
}

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 20px 72px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--success));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 16px 36px rgba(14, 91, 216, 0.24);
}

.brand-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.nav-group {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

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

.nav a,
.button-link,
.lang-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.nav a,
.button-link.secondary,
.lang-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.button-link.primary,
.lang-button.is-active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-color: transparent;
  box-shadow: 0 16px 40px rgba(14, 91, 216, 0.28);
}

.nav a:hover,
.button-link:hover,
.lang-button:hover {
  transform: translateY(-1px);
}

.language-switcher {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 24px;
  align-items: stretch;
}

.panel,
.card {
  background: var(--panel);
  backdrop-filter: blur(18px);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.card {
  background: var(--panel-strong);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 8px 12px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1,
.page-title {
  margin: 18px 0 12px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.06;
}

.page-title {
  font-size: clamp(30px, 4vw, 44px);
}

.lead,
.hero p,
.prose p,
.prose li {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.stat-card,
.feature,
.link-list a {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(17, 24, 39, 0.08);
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
}

.stat-label {
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
}

.section {
  margin-top: 24px;
}

.section h2,
.prose h2 {
  margin: 0 0 12px;
  font-size: 20px;
}

.feature-list,
.link-list,
.faq-list {
  display: grid;
  gap: 12px;
}

.feature strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

.feature span {
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.link-list a {
  color: var(--accent);
  text-decoration: none;
}

.prose h2 {
  margin-top: 28px;
}

.prose ul {
  margin: 0;
  padding-left: 20px;
}

.faq-item {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(17, 24, 39, 0.08);
}

.faq-item strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

.faq-item span {
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

.footer {
  margin-top: 28px;
  color: var(--muted);
  font-size: 13px;
}

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

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

@media (max-width: 720px) {
  .shell {
    padding-top: 20px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-group,
  .nav,
  .language-switcher {
    align-items: flex-start;
    justify-content: flex-start;
  }

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