:root {
  --color-bg: #030b1a;
  --color-surface: rgba(16, 29, 54, 0.9);
  --color-surface-light: rgba(18, 40, 80, 0.7);
  --color-primary: #3d7bff;
  --color-primary-light: #65c8ff;
  --color-accent: #8a5cff;
  --color-text: #e6ecff;
  --color-muted: #9aa8c7;
  --gradient-1: linear-gradient(135deg, #3d7bff 0%, #65c8ff 100%);
  --gradient-2: linear-gradient(135deg, #8a5cff 0%, #bb86ff 100%);
  --gradient-3: linear-gradient(135deg, #1ddebb 0%, #65c8ff 100%);
  --gradient-4: linear-gradient(135deg, #ff8a80 0%, #ff6ec7 100%);
  --gradient-5: linear-gradient(135deg, #ffd166 0%, #fca311 100%);
  --shadow-lg: 0 24px 60px rgba(10, 23, 46, 0.45);
  --shadow-md: 0 16px 40px rgba(8, 18, 36, 0.35);
  --border-radius: 18px;
  font-size: 16px;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at top left, rgba(61, 123, 255, 0.15), transparent 45%),
              radial-gradient(circle at top right, rgba(138, 92, 255, 0.18), transparent 50%),
              var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  position: relative;
  padding: 48px 0 120px;
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(25, 46, 92, 0.85) 0%, rgba(3, 11, 26, 0.9) 60%, rgba(3, 11, 26, 0.95) 100%);
  z-index: -1;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0 32px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav__links a {
  font-weight: 500;
  color: var(--color-muted);
  transition: color 0.25s ease;
}

.nav__links a:hover {
  color: var(--color-primary-light);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav__toggle span {
  width: 28px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hero__content {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 64px;
  align-items: center;
}

.hero__text h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  margin-bottom: 20px;
}

.hero__text p {
  color: var(--color-muted);
  margin-bottom: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(61, 123, 255, 0.12);
  color: var(--color-primary-light);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.cta-group {
  display: flex;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 12px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--gradient-1);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  border: 1px solid rgba(100, 200, 255, 0.35);
  color: var(--color-primary-light);
}

.btn--secondary {
  background: rgba(61, 123, 255, 0.18);
  border: 1px solid rgba(61, 123, 255, 0.4);
  color: var(--color-primary-light);
}

.btn--video {
  border: 1px solid rgba(138, 92, 255, 0.4);
  color: var(--color-accent);
}

.hero__visual {
  position: relative;
}

.screen {
  background: rgba(9, 19, 38, 0.9);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(61, 123, 255, 0.18);
  backdrop-filter: blur(12px);
}

.screen__header {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.screen__header span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(61, 123, 255, 0.4);
}

.code-block {
  background: rgba(3, 11, 26, 0.8);
  padding: 20px;
  border-radius: 18px;
  font-family: 'Fira Code', 'Roboto Mono', monospace;
  color: #b6d9ff;
  font-size: 0.9rem;
  box-shadow: inset 0 0 0 1px rgba(61, 123, 255, 0.15);
}

.metrics {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid rgba(61, 123, 255, 0.12);
}

.metrics .label {
  color: var(--color-muted);
  font-size: 0.8rem;
}

.section {
  padding: 100px 0;
}

.section__header {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}

.section__header h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 16px;
}

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

.value-prop__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.value-card {
  background: rgba(13, 27, 52, 0.85);
  border-radius: var(--border-radius);
  padding: 32px;
  border: 1px solid rgba(61, 123, 255, 0.1);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.value-card:hover {
  transform: translateY(-6px);
  border-color: rgba(101, 200, 255, 0.45);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.feature-card {
  background: rgba(10, 22, 42, 0.82);
  border-radius: 20px;
  padding: 32px;
  border: 1px solid rgba(138, 92, 255, 0.12);
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(138, 92, 255, 0.4);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  margin-bottom: 24px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.gradient-1 { background: var(--gradient-1); }
.gradient-2 { background: var(--gradient-2); }
.gradient-3 { background: var(--gradient-3); }
.gradient-4 { background: var(--gradient-4); }
.gradient-5 { background: var(--gradient-5); }

.feature-meta {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.architecture {
  position: relative;
}

.architecture__diagram {
  background: rgba(8, 18, 38, 0.9);
  border-radius: 24px;
  padding: 48px;
  border: 1px solid rgba(61, 123, 255, 0.18);
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 32px;
}

.diagram-layer {
  display: grid;
  gap: 16px;
}

.diagram-layer h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary-light);
}

.diagram-items {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.diagram-item {
  padding: 12px 20px;
  border-radius: 14px;
  background: rgba(22, 41, 77, 0.85);
  border: 1px solid rgba(101, 200, 255, 0.2);
  font-weight: 500;
}

.diagram-connector {
  justify-self: center;
  background: rgba(61, 123, 255, 0.14);
  border: 1px solid rgba(61, 123, 255, 0.35);
  border-radius: 999px;
  padding: 10px 28px;
  font-weight: 600;
  color: var(--color-primary-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.diagram-core {
  display: grid;
  gap: 24px;
  background: rgba(6, 14, 30, 0.9);
  padding: 28px;
  border-radius: 20px;
  border: 1px solid rgba(138, 92, 255, 0.24);
}

.diagram-stack {
  display: grid;
  gap: 12px;
}

.diagram-stack div {
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(138, 92, 255, 0.12);
  border: 1px solid rgba(138, 92, 255, 0.35);
  text-align: center;
}

.diagram-services {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.diagram-services div {
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(33, 58, 99, 0.7);
  border: 1px solid rgba(61, 123, 255, 0.2);
}

.use-cases__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.use-case {
  background: rgba(12, 24, 46, 0.8);
  border-radius: 20px;
  padding: 28px;
  border: 1px solid rgba(61, 123, 255, 0.15);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.use-case:hover {
  transform: translateY(-6px);
  border-color: rgba(101, 200, 255, 0.4);
}

.trust {
  background: radial-gradient(circle at top, rgba(61, 123, 255, 0.12), transparent 60%), rgba(4, 12, 24, 0.95);
}

.trust__logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}

.logo-placeholder {
  background: rgba(14, 28, 52, 0.85);
  border: 1px dashed rgba(61, 123, 255, 0.35);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.trust__cards {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.testimonial {
  background: rgba(9, 20, 40, 0.85);
  border-radius: 20px;
  padding: 32px;
  border: 1px solid rgba(138, 92, 255, 0.15);
  font-style: italic;
  position: relative;
}

.testimonial::before {
  content: "\201C";
  position: absolute;
  top: -10px;
  left: 20px;
  font-size: 4rem;
  color: rgba(138, 92, 255, 0.25);
}

.author {
  margin-top: 24px;
  font-style: normal;
  color: var(--color-primary-light);
}

.cta {
  background: linear-gradient(135deg, rgba(61, 123, 255, 0.25), rgba(138, 92, 255, 0.25));
  padding: 80px 0;
}

.cta__container {
  display: grid;
  gap: 32px;
  align-items: center;
  background: rgba(6, 14, 30, 0.85);
  border-radius: 24px;
  padding: 48px;
  border: 1px solid rgba(61, 123, 255, 0.25);
  box-shadow: var(--shadow-lg);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer {
  position: relative;
  padding: 80px 0 40px;
  background: linear-gradient(180deg, rgba(6, 14, 30, 0.95), rgba(3, 11, 26, 0.95));
  border-top: 1px solid rgba(61, 123, 255, 0.15);
}

.footer__container {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 48px;
}

.footer__about h3,
.footer__contact h3,
.footer__links h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--color-primary-light);
}

.footer__about p {
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.footer__contact p {
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.6;
}

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

.footer__links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__links li {
  margin-bottom: 12px;
}

.footer__links a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.25s ease;
  display: inline-block;
}

.footer__links a:hover {
  color: var(--color-primary-light);
  transform: translateX(3px);
}

/* 快速链接列表样式 */
.footer__link-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__link-list li {
  margin-bottom: 12px;
}

.footer__link-list a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.25s ease, transform 0.25s ease;
  display: inline-block;
}

.footer__link-list a:hover {
  color: var(--color-primary-light);
  transform: translateX(3px);
}

.footer__legal {
  grid-column: 1 / -1;
  font-size: 0.85rem;
  color: rgba(154, 168, 199, 0.6);
  text-align: center;
}

@media (max-width: 960px) {
  .hero__content {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    order: -1;
  }

  .cta__container {
    padding: 36px;
  }
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: absolute;
    top: 72px;
    right: 24px;
    background: rgba(9, 19, 38, 0.95);
    border: 1px solid rgba(61, 123, 255, 0.2);
    border-radius: 16px;
    padding: 20px;
    flex-direction: column;
    gap: 16px;
    display: none;
    min-width: 180px;
    box-shadow: var(--shadow-md);
  }

  .nav__links--open {
    display: flex;
  }

  .nav__toggle--open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav__toggle--open span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle--open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 72px 0;
  }

  .architecture__diagram {
    padding: 32px;
  }

  .cta__container {
    padding: 28px;
  }
}