* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #020617;
  color: #e5e7eb;
  line-height: 1.5;
}

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

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 顶部导航 */

.navbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.7));
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.logo-icon {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  border: 2px solid #38bdf8;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.logo-text {
  font-size: 18px;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 14px;
  color: #cbd5f5;
}

.nav-links a {
  opacity: 0.8;
}

.nav-links a:hover {
  opacity: 1;
}

.nav-actions {
  display: flex;
  gap: 8px;
}

/* 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(to right, #0ea5e9, #4f46e5);
  color: white;
  box-shadow: 0 14px 30px rgba(56, 189, 248, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(56, 189, 248, 0.45);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.4);
  color: #e5e7eb;
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.8);
}

/* Hero */

.hero {
  padding: 72px 0 40px;
  background: radial-gradient(circle at top, #1d283a 0, #020617 55%);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(56, 189, 248, 0.3);
  font-size: 12px;
  color: #7dd3fc;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 16px;
  color: #9ca3af;
  max-width: 480px;
  margin-bottom: 20px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 10px;
}

.hero-note {
  font-size: 13px;
  color: #6b7280;
}

/* Hero 右侧卡片 */

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

.hero-card {
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.2), rgba(15, 23, 42, 0.98));
  border-radius: 18px;
  padding: 20px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.8);
  width: 100%;
  max-width: 360px;
}

.hero-card h3 {
  font-size: 16px;
  margin-bottom: 14px;
}

.hero-metrics {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.metric-label {
  font-size: 11px;
  color: #9ca3af;
}

.metric-value {
  font-size: 18px;
  font-weight: 600;
}

.hero-chart-placeholder {
  border-radius: 12px;
  border: 1px dashed rgba(148, 163, 184, 0.5);
  padding: 18px;
  font-size: 13px;
  color: #9ca3af;
}

/* Logo 区 */

.logos {
  padding: 24px 0 40px;
  background: #020617;
}

.logos-title {
  font-size: 13px;
  color: #6b7280;
  text-align: center;
  margin-bottom: 14px;
}

.logos-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  font-size: 13px;
  color: #9ca3af;
}

/* 通用 Section */

.section {
  padding: 56px 0;
}

.section-alt {
  background: radial-gradient(circle at top, #020617, #020617);
  border-top: 1px solid rgba(31, 41, 55, 0.9);
}

.section h2 {
  font-size: 28px;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 15px;
  color: #9ca3af;
  max-width: 520px;
}

.grid-3 {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.grid-2 {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 18px;
  padding: 18px 18px 20px;
  border: 1px solid rgba(31, 41, 55, 0.9);
}

.card-outline {
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), #020617);
  border-color: rgba(56, 189, 248, 0.35);
}

.card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.card p {
  font-size: 14px;
  color: #9ca3af;
}

/* 列表 */

.feature-list {
  margin-top: 12px;
  padding-left: 18px;
  font-size: 13px;
  color: #9ca3af;
}

.feature-list li + li {
  margin-top: 4px;
}

/* CTA 区 */

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

.cta p {
  color: #9ca3af;
}

.cta-actions {
  display: flex;
  gap: 10px;
}

/* 页脚 */

.footer {
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  padding: 28px 0 36px;
  background: #020617;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-start;
}

.footer-copy {
  font-size: 12px;
  color: #6b7280;
  margin-top: 6px;
}

.footer-columns {
  display: flex;
  gap: 40px;
}

.footer-col h4 {
  font-size: 13px;
  margin-bottom: 8px;
}

.footer-col a {
  display: block;
  font-size: 13px;
  color: #9ca3af;
  margin-top: 4px;
}

/* 响应式 */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: 32px;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-columns {
    flex-wrap: wrap;
  }
}