:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #111827;
  --muted: #5f6b7a;
  --line: #e5e9ef;
  --soft: #f6f8fb;
  --accent: #1769ff;
  --accent-dark: #0d4fcc;
  --card: #ffffff;
  --shadow: 0 22px 70px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 17px min(6vw, 72px);
  border-bottom: 1px solid rgba(229, 233, 239, 0.9);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(18px);
}

.brand {
  display: inline-flex;
  min-width: 190px;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 11px;
  background: var(--accent);
  color: #ffffff;
  font-family: Georgia, serif;
  font-size: 21px;
  font-style: italic;
  box-shadow: 0 10px 24px rgba(23, 105, 255, 0.22);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
  line-height: 1.15;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.hero {
  max-width: 1060px;
  margin: 0 auto;
  padding: 118px min(6vw, 32px) 100px;
  text-align: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.04em;
}

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

h1 {
  margin-bottom: 16px;
  font-size: clamp(48px, 8vw, 88px);
  line-height: 1.06;
  letter-spacing: -0.05em;
}

h1 span {
  color: var(--accent);
}

.hero-subtitle {
  margin-bottom: 20px;
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 750;
  line-height: 1.25;
}

.hero-copy {
  max-width: 720px;
  margin: 0 auto 30px;
  color: var(--muted);
  font-size: 18px;
}

.status-badge {
  display: inline-flex;
  min-height: 40px;
  padding: 0 18px;
  align-items: center;
  gap: 9px;
  border: 1px solid #d9e4ff;
  border-radius: 999px;
  background: #f4f7ff;
  color: #3b5f9f;
  font-size: 14px;
  font-weight: 650;
}

.status-badge span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(23, 105, 255, 0.12);
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 78px min(6vw, 32px);
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 32px;
}

.section h2 {
  margin-bottom: 20px;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: start;
}

.panel,
.contact-card,
.feature-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.panel {
  padding: 30px;
}

.panel p {
  margin-bottom: 15px;
  color: var(--muted);
}

.panel p:last-child {
  margin-bottom: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 225px;
  padding: 28px;
}

.feature-icon {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.feature-card h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.contact-card {
  overflow: hidden;
}

.contact-card div {
  display: grid;
  padding: 22px 28px;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 0.8fr 1.2fr;
  gap: 18px;
}

.contact-card div:last-child {
  border-bottom: 0;
}

.contact-card span {
  color: var(--muted);
  font-size: 14px;
}

.contact-card strong {
  font-weight: 700;
}

.filing {
  max-width: none;
  padding-right: max(32px, calc((100vw - 1116px) / 2));
  padding-left: max(32px, calc((100vw - 1116px) / 2));
  background: var(--soft);
}

.filing-list {
  margin: 0;
  border-top: 1px solid #d9dee6;
}

.filing-list div {
  display: grid;
  padding: 22px 0;
  border-bottom: 1px solid #d9dee6;
  grid-template-columns: 0.4fr 1.6fr;
  gap: 20px;
}

.filing-list dt {
  color: var(--muted);
  font-size: 14px;
}

.filing-list dd {
  margin: 0;
  font-weight: 650;
}

.filing-list a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.filing-note {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 36px min(6vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer strong {
  color: var(--text);
}

.site-footer p {
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 15px 20px;
  }

  .nav {
    justify-content: flex-start;
    gap: 14px 20px;
  }

  .hero {
    padding-top: 78px;
  }

  .feature-grid,
  .split {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 0;
  }

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

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }

  .nav {
    font-size: 13px;
  }

  .hero {
    padding-top: 64px;
  }

  .contact-card div,
  .filing-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}