:root {
  --bg: #08141f;
  --bg-soft: #102433;
  --panel: #0d1d2b;
  --text: #e7f1fb;
  --muted: #9db4c9;
  --line: rgba(157, 180, 201, 0.25);
  --accent: #16b8a5;
  --accent-warm: #ffb347;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(circle at 10% 0%, rgba(22, 184, 165, 0.2), transparent 40%),
    radial-gradient(circle at 90% 15%, rgba(255, 179, 71, 0.18), transparent 35%),
    var(--bg);
  color: var(--text);
  font-family: 'Noto Sans SC', sans-serif;
  line-height: 1.6;
}

h1,
h2,
h3,
.brand {
  font-family: 'Manrope', 'Noto Sans SC', sans-serif;
  letter-spacing: 0.02em;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at center, #000 25%, transparent 85%);
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
  background: rgba(8, 20, 31, 0.72);
  border-bottom: 1px solid var(--line);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 800;
}

.brand::before {
  content: '';
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: url('./assets/brand-mark.png') center/contain no-repeat;
  flex: 0 0 30px;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.25));
}

.nav nav {
  display: flex;
  gap: 1.15rem;
}

.nav nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

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

.nav nav a.lang-switch {
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  background: rgba(13, 29, 43, 0.55);
}

.nav nav a.lang-switch:hover {
  border-color: rgba(22, 184, 165, 0.65);
}

.hero {
  padding: 84px 0 32px;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.6rem);
  line-height: 1.1;
  margin: 10px 0 18px;
}

.lead {
  color: var(--muted);
  max-width: 760px;
  font-size: 1.06rem;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.btn-icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 16px;
}

.btn-icon svg {
  width: 16px;
  height: 16px;
  display: block;
}

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

.btn-primary {
  color: #072026;
  background: linear-gradient(135deg, var(--accent), #5de1d2);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(13, 29, 43, 0.65);
}

.stats {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  display: block;
  background: linear-gradient(180deg, rgba(13, 29, 43, 0.92), rgba(13, 29, 43, 0.58));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  color: var(--text);
  text-decoration: none;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(22, 184, 165, 0.65);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.num {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent-warm);
}

.label {
  font-size: 0.92rem;
  color: var(--muted);
}

.stat-desc {
  margin-top: 6px;
  display: block;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.stat-link {
  margin-top: 8px;
  display: inline-block;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
}

.section {
  padding: 62px 0 8px;
}

h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
}

.section-intro {
  margin-top: 10px;
  color: var(--muted);
}

.feature-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  border-radius: 18px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
}

.feature-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  filter: saturate(110%);
}

.feature-content {
  padding: 16px;
}

.feature-content h3 {
  margin: 0 0 8px;
  font-size: 1.14rem;
}

.feature-content p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.text-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

.open-source-card {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(130deg, rgba(13, 29, 43, 0.8), rgba(16, 36, 51, 0.55));
  border-radius: 16px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.open-source-card h3 {
  margin: 4px 0 8px;
}

.open-source-card p {
  margin: 0;
  color: var(--muted);
}

.open-source-tag {
  margin: 0;
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-weight: 700;
}

.quick-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.quick-grid article {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(13, 29, 43, 0.7);
  padding: 16px;
}

.quick-grid h3 {
  margin: 0 0 8px;
}

.quick-grid p {
  margin: 0;
  color: var(--muted);
}

.page-main {
  padding-top: 24px;
}

.page-header {
  padding: 42px 0 8px;
}

.page-header p {
  color: var(--muted);
  max-width: 780px;
}

.list-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(13, 29, 43, 0.75);
  padding: 18px;
}

.module-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.module-list h3 {
  margin: 0 0 8px;
}

.module-list p {
  margin: 0;
  color: var(--muted);
}

.pricing-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.price-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  background: rgba(13, 29, 43, 0.75);
}

.price-card h3 {
  margin: 0 0 8px;
}

.price {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--accent-warm);
}

.price-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.price-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.price-card li {
  margin: 6px 0;
  color: var(--muted);
}

.highlight {
  outline: 2px solid rgba(22, 184, 165, 0.6);
  box-shadow: 0 0 0 4px rgba(22, 184, 165, 0.12);
}

.case-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.case-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(13, 29, 43, 0.74);
  padding: 16px;
}

.case-card h3 {
  margin: 0 0 8px;
}

.case-kpi {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.case-kpi span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--text);
  font-size: 0.85rem;
}

.crumb {
  color: var(--muted);
  font-size: 0.9rem;
}

.crumb a {
  color: var(--muted);
  text-decoration: none;
}

.crumb a:hover {
  color: var(--text);
}

.module-hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 16px;
  align-items: center;
}

.module-hero img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--line);
  object-fit: cover;
  max-height: 280px;
}

.trace-total p {
  margin: 10px 0;
  color: var(--muted);
}

.trace-grid {
  margin-top: 4px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.trace-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(13, 29, 43, 0.78);
  padding: 16px;
}

.trace-card h3 {
  margin: 0;
  font-size: 1.06rem;
}

.trace-count {
  margin: 6px 0 12px;
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--accent-warm);
}

.trace-list {
  margin: 0;
  padding-left: 18px;
}

.trace-list li {
  margin: 6px 0;
  color: var(--muted);
}

.usage-grid {
  margin-top: 12px;
}

.site-footer a {
  color: var(--muted);
}

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

.value-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.value-grid article {
  border: 1px solid var(--line);
  background: rgba(13, 29, 43, 0.72);
  border-radius: 14px;
  padding: 18px;
}

.value-grid h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.value-grid p {
  margin: 0;
  color: var(--muted);
}

.scene-list {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.scene-list span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 13px;
  background: rgba(16, 36, 51, 0.72);
  color: var(--text);
  font-size: 0.92rem;
}

.cta {
  margin-top: 20px;
  margin-bottom: 54px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(120deg, rgba(22, 184, 165, 0.16), rgba(255, 179, 71, 0.1));
  padding: 30px;
}

.cta p {
  color: var(--muted);
  margin: 12px 0 20px;
}

.lead-form {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.lead-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
}

.lead-form input,
.lead-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(8, 20, 31, 0.75);
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}

.lead-form input::placeholder,
.lead-form textarea::placeholder {
  color: var(--muted);
}

.lead-form input:focus,
.lead-form textarea:focus {
  outline: 2px solid rgba(22, 184, 165, 0.45);
  border-color: rgba(22, 184, 165, 0.8);
}

.lead-full {
  grid-column: 1 / -1;
}

.lead-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.lead-hint {
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer .container {
  padding: 16px 0 34px;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: revealIn 0.75s ease forwards;
}

.reveal:nth-of-type(2) { animation-delay: 0.08s; }
.reveal:nth-of-type(3) { animation-delay: 0.15s; }
.reveal:nth-of-type(4) { animation-delay: 0.23s; }
.reveal:nth-of-type(5) { animation-delay: 0.31s; }

@keyframes revealIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .stats,
  .feature-grid,
  .value-grid,
  .quick-grid,
  .module-list,
  .trace-grid,
  .pricing-grid,
  .case-grid,
  .module-hero {
    grid-template-columns: 1fr;
  }

  .nav nav {
    display: none;
  }

  .hero {
    padding-top: 56px;
  }

  .open-source-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .lead-form {
    grid-template-columns: 1fr;
  }
}