:root {
  --bg: #0b0d13;
  --bg-elevated: #131622;
  --bg-terminal: #0e1119;
  --border: #1e2333;
  --border-strong: #2b3247;
  --text: #e8ecf6;
  --text-muted: #9aa4bd;
  --text-dim: #5e6885;
  --accent: #4f8cff;
  --accent-soft: #7aa5ff;
  --accent-dim: rgba(79, 140, 255, 0.12);
  --accent-glow: rgba(79, 140, 255, 0.35);
  --accent-glow-soft: rgba(79, 140, 255, 0.14);
  --bg-glass: rgba(11, 13, 19, 0.72);
  --bg-glass-strong: rgba(11, 13, 19, 0.92);
  --amber: #fbbf24;
  --mono: 'JetBrains Mono Variable', 'JetBrains Mono', 'Fira Code', 'SFMono-Regular', Consolas, 'Courier New', monospace;
  --sans: 'Inter Variable', 'Inter', system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html {
  scrollbar-width: thin;
  scrollbar-color: var(--text-dim) var(--bg);
}

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 10px;
  border: 3px solid var(--bg);
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
  border: 3px solid var(--bg);
  background-clip: padding-box;
}

::-webkit-scrollbar-corner {
  background: var(--bg);
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

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

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

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(ellipse 50% 35% at 50% -5%, rgba(79, 140, 255, 0.10), transparent),
    radial-gradient(ellipse 35% 28% at 15% 45%, rgba(57, 208, 240, 0.05), transparent),
    radial-gradient(ellipse 25% 22% at 85% 60%, rgba(79, 140, 255, 0.06), transparent);
}

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: var(--bg-glass);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 15px;
}

.nav-brand img {
  width: 28px;
  height: 28px;
  filter: brightness(1.8);
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13.5px;
  color: var(--text-muted);
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 28px;
}

.lang-dd {
  position: relative;
}

.lang-dd-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--text-muted);
  font-family: var(--sans);
  font-size: 12.5px;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.lang-dd-btn:hover,
.lang-dd.is-open .lang-dd-btn {
  border-color: var(--accent);
  color: var(--text);
}

.lang-dd-btn:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow:
    0 0 0 2px var(--bg-elevated),
    0 0 0 4px var(--accent);
}

.lang-dd-globe {
  color: var(--accent);
  flex-shrink: 0;
}

.lang-dd-chev {
  color: var(--text-dim);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.lang-dd.is-open .lang-dd-chev {
  transform: rotate(180deg);
}

.lang-dd-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 60;
  min-width: 190px;
  max-height: 340px;
  overflow-y: auto;
  overscroll-behavior: contain;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(79, 140, 255, 0.06);
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  transform-origin: top right;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.lang-dd.is-open .lang-dd-menu {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.lang-dd-menu[hidden] {
  display: none;
}

.lang-dd-item {
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  transition: background 0.12s ease, color 0.12s ease;
}

.lang-dd-item:hover {
  background: var(--accent-dim);
  color: var(--text);
}

.lang-dd-item.is-active {
  color: var(--accent);
  font-weight: 600;
}

.lang-dd-item.is-active::after {
  content: '✓';
  float: right;
  color: var(--accent);
}

.lang-dd-menu {
  scrollbar-width: thin;
  scrollbar-color: var(--text-dim) transparent;
}

.lang-dd-menu::-webkit-scrollbar {
  width: 8px;
}

.lang-dd-menu::-webkit-scrollbar-track {
  background: transparent;
}

.lang-dd-menu::-webkit-scrollbar-thumb {
  background: var(--text-dim);
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.lang-dd-menu::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
  border: 2px solid transparent;
  background-clip: padding-box;
}


.hero {
  padding: 120px 0 88px;
  text-align: center;
}

.hero-logo {
  width: 96px;
  height: 96px;
  margin: 0 auto 28px;
  filter: brightness(1.9) drop-shadow(0 0 32px var(--accent-glow));
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  font-weight: 800;
  letter-spacing: 0.1em;
  line-height: 1.1;
}

.hero .sub {
  margin-top: 24px;
  max-width: 640px;
  margin-inline: auto;
  color: var(--text-muted);
  font-size: 15px;
}

.hero-cta {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.18s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 0 40px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

.section {
  padding: 88px 0;
}

.section-head {
  margin-bottom: 48px;
}

.section-title {
  margin-top: 10px;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.product-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0) 32%),
    var(--bg-elevated);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  padding: 34px;
  transition: border-color 0.25s ease, box-shadow 0.35s ease, transform 0.25s ease;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(79, 140, 255, 0.35), rgba(57, 208, 240, 0.15), transparent 55%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.product-card:hover {
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(79, 140, 255, 0.18),
    0 0 32px var(--accent-glow-soft),
    0 0 90px rgba(57, 208, 240, 0.08);
}

.product-card:hover::before {
  opacity: 1;
}

.product-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.product-title {
  font-size: 22px;
  font-weight: 700;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.badge-closed {
  border: 1px solid rgba(251, 191, 36, 0.35);
  color: var(--amber);
  background: rgba(251, 191, 36, 0.08);
}

.badge-open {
  border: 1px solid rgba(79, 140, 255, 0.4);
  color: var(--accent-soft);
  background: var(--accent-dim);
}

.product-tagline {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 14.5px;
}

.product-platforms {
  margin-top: 20px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.platform-chip {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  background: var(--bg);
}

.product-links {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.link-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 14px;
  transition: border-color 0.15s ease, color 0.15s ease;
  cursor: pointer;
  background: none;
  text-decoration: none;
  line-height: inherit;
}

.link-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.capabilities {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.cap-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0) 40%),
    var(--bg);
  transition: border-color 0.2s ease, box-shadow 0.25s ease, transform 0.2s ease;
}

.cap-card:hover {
  border-color: rgba(79, 140, 255, 0.35);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3), 0 0 18px var(--accent-glow-soft);
  transform: translateY(-2px);
}

.cap-key {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.cap-value {
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--text-muted);
}

.demo-placeholder {
  margin-top: 24px;
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
  padding: 36px;
  text-align: center;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 13px;
}

.terminal {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-terminal);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.r { background: #ff5f57; }
.terminal-dot.y { background: #febc2e; }
.terminal-dot.g { background: #28c840; }

.terminal-title {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
}

.terminal-body {
  padding: 24px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.9;
  overflow-x: auto;
}

.tl { color: var(--text-dim); }
.tk { color: var(--accent); }
.td { color: var(--text-muted); }

.terminal-body .tk {
  display: inline-block;
  min-width: 13ch;
  margin-right: 2ch;
}

.mailto-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(11, 13, 19, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: mailto-fade 0.15s ease-out;
}

.mailto-dialog {
  width: min(420px, calc(100vw - 48px));
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: var(--bg-elevated);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 24px rgba(79, 140, 255, 0.08);
  padding: 32px 32px 24px;
  animation: mailto-pop 0.18s ease-out;
}

.mailto-dialog-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.mailto-dialog-title::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px var(--amber);
  flex-shrink: 0;
}

.mailto-dialog-body {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

.mailto-dialog-mail {
  margin-top: 20px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
  word-break: break-all;
  line-height: 1.5;
}

.mailto-dialog-footer {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}

.mailto-dialog-btn {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 24px;
  background: none;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.mailto-dialog-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@keyframes mailto-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes mailto-pop {
  from { opacity: 0; transform: translateY(6px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 13px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand img {
  width: 20px;
  height: 20px;
  filter: brightness(1.8);
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}

.footer-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.footer-mail {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  transition: color 0.15s ease, text-shadow 0.15s ease;
}

.footer-mail:hover {
  color: var(--text);
  text-shadow: 0 0 12px var(--accent-glow);
}

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

@media (max-width: 768px) {
  .hero { padding: 96px 0 72px; }
  .section { padding: 72px 0; }
}

@media (max-width: 640px) {
  .hero { padding: 80px 0 64px; }
  .section { padding: 64px 0; }
  .nav-links { gap: 16px; }
  .nav-links a:nth-child(3) { display: none; }
}