:root {
  color-scheme: dark;
  --bg: #050816;
  --bg-alt: #0b1020;
  --bg-soft: #12182a;
  --accent: #4f46e5;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --accent-strong: #6366f1;
  --text: #e5e7eb;
  --text-soft: #9ca3af;
  --border-subtle: rgba(148, 163, 184, 0.3);
  --shadow-soft: 0 24px 60px rgba(15, 23, 42, 0.95);
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --transition-fast: 0.18s ease-out;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top, #111827 0, #020617 50%, #020617 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(2, 6, 23, 0.96),
    rgba(2, 6, 23, 0.78),
    transparent
  );
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

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

.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 14px;
  color: #e5e7eb;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}

.nav a {
  position: relative;
  padding: 6px 0;
  color: #9ca3af;
  transition: color var(--transition-fast);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(to right, #6366f1, #22c55e);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-fast);
}

.nav a:hover {
  color: #e5e7eb;
}

.nav a:hover::after {
  transform: scaleX(1);
}

.hero {
  padding: 80px 0 72px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: center;
}

.hero-text h1 {
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  margin: 0 0 18px;
  color: var(--text-soft);
  font-size: 15px;
}

.hero-bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  color: var(--text-soft);
  font-size: 14px;
}

.hero-bullets li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 6px;
}

.hero-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(135deg, #6366f1, #22c55e);
}

.hero-meta {
  margin-top: 10px;
  font-size: 12px;
  color: #6b7280;
}

.hero-panel {
  display: flex;
  justify-content: flex-end;
}

.hero-card {
  width: 100%;
  max-width: 420px;
  background: radial-gradient(circle at top left, #111827 0, #020617 55%);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(148, 163, 184, 0.55);
  padding: 22px 22px 20px;
  box-shadow: var(--shadow-soft);
}

.hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-size: 12px;
}

.tag {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(34, 197, 94, 0.08);
  color: #bbf7d0;
}

.time {
  color: #9ca3af;
}

.hero-card h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.hero-card-list {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: #d1d5db;
}

.hero-card-list li {
  margin-bottom: 6px;
}

.hero-card-footer {
  margin-top: 14px;
  font-size: 13px;
  color: #9ca3af;
}

.btn {
  border: none;
  cursor: pointer;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, #6366f1, #22c55e);
  color: white;
  box-shadow: 0 18px 40px rgba(79, 70, 229, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 50px rgba(79, 70, 229, 0.6);
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
  border: 1px solid rgba(148, 163, 184, 0.6);
}

.btn-secondary:hover {
  background: rgba(15, 23, 42, 1);
}

.section {
  padding: 56px 0;
}

.section-alt {
  background: radial-gradient(circle at top, #020617 0, #020617 38%, #020617 100%);
}

.section-cta {
  background: linear-gradient(135deg, #111827, #020617);
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  border-bottom: 1px solid rgba(148, 163, 184, 0.3);
}

.section h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.section-intro {
  margin: 0 0 26px;
  font-size: 14px;
  color: var(--text-soft);
}

.grid {
  display: grid;
  gap: 22px;
}

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

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

.card {
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, #111827 0, #020617 60%);
  border: 1px solid rgba(148, 163, 184, 0.45);
  padding: 18px 16px 16px;
  font-size: 14px;
  color: #d1d5db;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p {
  margin: 0;
  color: var(--text-soft);
}

.insights-grid {
  margin-top: 4px;
}

.insight-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top left, #0b1120 0, #020617 70%);
  border: 1px solid rgba(99, 102, 241, 0.55);
  padding: 18px 18px 16px 22px;
  font-size: 14px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.95);
}

.insight-card h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.insight-card p {
  margin: 0;
  color: var(--text-soft);
}

.insight-index {
  position: absolute;
  top: 14px;
  right: 18px;
  font-size: 24px;
  font-weight: 700;
  color: rgba(148, 163, 184, 0.18);
}

.section-cta .cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-text h2 {
  margin: 0 0 8px;
}

.cta-text p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
}

.cta-actions {
  text-align: right;
}

.cta-actions .btn {
  margin-left: 10px;
}

.cta-meta {
  margin: 8px 0 0;
  font-size: 12px;
  color: #9ca3af;
}

.site-footer {
  padding: 24px 0 30px;
  font-size: 12px;
  color: #6b7280;
}

.footer-inner {
  border-top: 1px solid rgba(55, 65, 81, 0.9);
  padding-top: 14px;
}

.footer-meta {
  margin-top: 4px;
}

@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-panel {
    justify-content: flex-start;
  }

  .section-cta .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-actions {
    text-align: left;
  }
}

@media (max-width: 720px) {
  .nav {
    display: none;
  }

  .hero {
    padding-top: 56px;
  }

  .hero-text h1 {
    font-size: 26px;
  }

  .three-cols {
    grid-template-columns: minmax(0, 1fr);
  }

  .two-cols {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-card {
    max-width: 100%;
  }
}