:root {
  --bg: #05060a;
  --bg-alt: #0c0f1a;
  --card: #101427;
  --text: #e6e8f0;
  --muted: #8f95b2;
  --accent: #3d7cff;
  --accent-2: #4fe3c1;
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Microsoft Yahei", sans-serif;
  background: radial-gradient(circle at top, #0f1731 0%, #05060a 55%);
  color: var(--text);
  line-height: 1.6;
}

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

img {
  max-width: 100%;
}

.container {
  width: min(1200px, 90%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(5, 6, 10, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  padding: 6px;
  display: block;
  object-fit: cover;
}

.logo p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links .nav-cta {
  color: var(--text);
}

.nav-cta {
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
}

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

.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text);
}

.hero {
  padding: 120px 0 80px;
}

.hero-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 48px;
  align-items: center;
}

.badge {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(61, 124, 255, 0.15);
  color: var(--accent);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 56px);
  margin: 16px 0;
}

.subtitle {
  color: var(--muted);
  max-width: 520px;
}

.hero-actions {
  margin: 32px 0 20px;
  display: flex;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 28px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 0.2s, opacity 0.2s;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #05060a;
}

.btn.ghost {
  border-color: var(--border);
  color: var(--text);
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.hero-metrics {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-metrics strong {
  font-size: 32px;
  display: block;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hero-preview-grid img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 40px rgba(5, 6, 10, 0.35);
  transition: transform 0.25s ease;
}

.hero-preview-grid img:hover {
  transform: translateY(-6px);
}

.glow-card {
  background: linear-gradient(145deg, rgba(16, 20, 39, 0.95), rgba(14, 17, 31, 0.9));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 20px 60px rgba(6, 9, 20, 0.6);
}

.glow-card.secondary {
  border-style: dashed;
  text-align: center;
  color: var(--muted);
}

.glow-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.monitor-card {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.monitor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.monitor-header p {
  margin: 0;
  font-weight: 600;
}

.monitor-subtitle {
  color: var(--muted);
  font-size: 13px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(79, 227, 193, 0.15);
  color: var(--accent-2);
  font-size: 13px;
}

.status-pill .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 8px rgba(79, 227, 193, 0.8);
}

.monitor-body {
  display: flex;
  gap: 32px;
  align-items: center;
}

.monitor-ring {
  position: relative;
  width: 160px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(5, 6, 10, 0.7), rgba(5, 6, 10, 0.4));
  display: grid;
  place-items: center;
}

.monitor-ring::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: conic-gradient(var(--accent) 0deg 300deg, rgba(255, 255, 255, 0.08) 300deg 360deg);
  z-index: 0;
}

.monitor-ring::after {
  content: "";
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  background: var(--bg);
}

.monitor-ring span {
  position: relative;
  z-index: 1;
}

.ring-value {
  font-size: 28px;
  font-weight: 600;
}

.ring-label {
  color: var(--muted);
  font-size: 13px;
}

.monitor-chart {
  flex: 1;
  display: flex;
  gap: 12px;
  align-items: flex-end;
  height: 120px;
}

.chart-bar {
  position: relative;
  flex: 1;
  border-radius: 12px 12px 4px 4px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  color: var(--muted);
  font-size: 12px;
  background: linear-gradient(180deg, rgba(61, 124, 255, 0.7), rgba(61, 124, 255, 0.05));
  transition: height 0.3s ease;
}

.chart-bar span {
  margin-bottom: 8px;
}

.bar-a {
  height: 55%;
}

.bar-b {
  height: 80%;
}

.bar-c {
  height: 65%;
}

.bar-d {
  height: 90%;
}

.bar-e {
  height: 70%;
}

.monitor-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.metric-card {
  background: rgba(5, 6, 10, 0.35);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 16px;
}

.metric-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.metric-card strong {
  display: block;
  margin: 6px 0;
  font-size: 20px;
}

.trend {
  font-size: 12px;
  color: var(--muted);
}

.trend.up {
  color: var(--accent-2);
}

.section {
  padding: 80px 0;
}

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

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
}

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

.feature-grid,
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.feature-grid article,
.advantage-grid article {
  background: rgba(15, 19, 35, 0.9);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  min-height: 180px;
}

.feature-grid h3,
.advantage-grid h3 {
  margin-top: 0;
}

.feature-grid p,
.advantage-grid p {
  color: var(--muted);
}

.section.muted {
  background: rgba(5, 6, 10, 0.6);
}

.showcase .screens {
  margin-top: 32px;
}

.carousel {
  position: relative;
  background: rgba(12, 14, 26, 0.85);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: clamp(20px, 4vw, 32px);
  box-shadow: 0 30px 80px rgba(5, 6, 10, 0.55);
}

.carousel-main img {
  width: 100%;
  max-height: 520px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
  object-fit: contain;
  background: radial-gradient(circle at center, rgba(61, 124, 255, 0.1), rgba(5, 6, 10, 0.9));
  padding: 16px;
}

.carousel-caption {
  margin-top: 20px;
}

.carousel-caption h3 {
  margin: 0 0 8px;
}

.carousel-caption p {
  color: var(--muted);
  margin: 0;
}

.carousel-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  border: 1px solid var(--border);
  background: rgba(5, 6, 10, 0.8);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s, border-color 0.2s;
}

.carousel-control:hover {
  border-color: var(--accent);
  background: rgba(61, 124, 255, 0.2);
}

.carousel-control.prev {
  left: 24px;
}

.carousel-control.next {
  right: 24px;
}

.carousel-thumbs {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.carousel-thumbs .thumb {
  border: 1px solid var(--border);
  background: rgba(5, 6, 10, 0.4);
  border-radius: 18px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
  color: var(--muted);
}

.carousel-thumbs .thumb img {
  width: 100%;
  height: 80px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.carousel-thumbs .thumb span {
  font-size: 13px;
  text-align: center;
}

.carousel-thumbs .thumb.active {
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-2px);
}

.carousel-thumbs .thumb:focus-visible {
  outline: 2px solid var(--accent-2);
}

.download {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  align-items: center;
}

.download-info ul {
  list-style: none;
  padding: 0;
  color: var(--muted);
}

.download-info li {
  margin-bottom: 8px;
}

.download-card {
  background: rgba(12, 14, 26, 0.95);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 24px;
}

.requirement {
  margin-bottom: 16px;
}

.requirement strong {
  display: block;
  margin-bottom: 4px;
}

.faq details {
  background: rgba(12, 14, 26, 0.9);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 12px;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq p {
  color: var(--muted);
  margin: 12px 0 0;
}

.contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  align-items: start;
}

.contact ul {
  list-style: none;
  padding: 0;
  color: var(--muted);
}

.contact-form {
  background: rgba(12, 14, 26, 0.9);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  display: grid;
  gap: 16px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  font-size: 14px;
}

.contact-form input,
.contact-form textarea {
  background: rgba(5, 6, 10, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  color: var(--text);
  font-size: 14px;
}

.contact-form textarea {
  min-height: 120px;
  resize: vertical;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(5, 6, 10, 0.9);
  padding: 32px 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
}

.footer-meta {
  display: grid;
  gap: 4px;
  color: var(--muted);
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    inset: 72px 0 auto;
    background: rgba(5, 6, 10, 0.95);
    flex-direction: column;
    padding: 24px;
    transform: translateY(-120%);
    transition: transform 0.3s;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding-top: 80px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-metrics {
    gap: 20px;
  }

  .hero-preview-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .carousel {
    padding: 20px;
  }

  .carousel-control {
    position: static;
    transform: none;
    width: 100%;
    margin-top: 12px;
  }

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

  .monitor-ring {
    width: 120px;
  }

  .monitor-chart {
    width: 100%;
  }
}