/* Yunmotu Product Lab - global UI system */
:root {
  --bg: #05070a;
  --bg-2: #081018;
  --panel: rgba(12, 20, 29, 0.82);
  --panel-2: rgba(18, 29, 42, 0.68);
  --line: rgba(135, 184, 191, 0.16);
  --line-strong: rgba(101, 232, 213, 0.34);
  --text: #eff7f5;
  --muted: #a9b8bd;
  --faint: #6f8089;
  --cyan: #74f7e1;
  --cyan-2: #17c6ad;
  --amber: #e3bd72;
  --rose: #ff7b8c;
  --green: #96f2b5;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --radius: 10px;
  --radius-lg: 18px;
  --max: 1180px;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --mono: "Space Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 72% 8%, rgba(23, 198, 173, 0.24), transparent 26rem),
    radial-gradient(circle at 4% 34%, rgba(227, 189, 114, 0.1), transparent 24rem),
    linear-gradient(135deg, #05070a 0%, #071018 46%, #05070a 100%);
  color: var(--muted);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(rgba(116, 247, 225, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(116, 247, 225, 0.04) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at 50% 12%, black 0 30rem, transparent 56rem);
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.045;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 6px;
}

::selection {
  background: rgba(116, 247, 225, 0.26);
  color: var(--text);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 1000;
  padding: 0.75rem 1rem;
  color: #03110f;
  background: var(--cyan);
  border-radius: 0 0 8px 0;
}

.skip-link:focus {
  left: 0;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: rgba(5, 7, 10, 0.72);
  backdrop-filter: blur(18px);
}

.site-header.scrolled {
  border-bottom-color: var(--line);
}

.nav {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 1rem;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--cyan);
  background: linear-gradient(135deg, rgba(116, 247, 225, 0.12), rgba(227, 189, 114, 0.05));
  box-shadow: 0 0 30px rgba(23, 198, 173, 0.18);
}

.brand-sub {
  display: block;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  padding: 0;
}

.nav-links a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding: 0 0.9rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.94rem;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
  background: rgba(116, 247, 225, 0.08);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  background: var(--panel);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.72rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease);
}

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

.btn-primary {
  color: #03110f;
  background: linear-gradient(135deg, var(--cyan), var(--cyan-2));
  box-shadow: 0 18px 44px rgba(23, 198, 173, 0.24);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.btn-ghost:hover {
  border-color: var(--line-strong);
  color: var(--cyan);
}

.btn[aria-disabled="true"] {
  pointer-events: none;
  color: var(--faint);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.hero {
  position: relative;
  padding: clamp(4rem, 9vw, 8rem) 0 clamp(3rem, 7vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

h1,
h2,
h3,
h4 {
  color: var(--text);
  font-family: var(--serif);
  line-height: 1.14;
  letter-spacing: 0;
}

h1 {
  max-width: 12.6em;
  margin-top: 1rem;
  font-size: clamp(2.8rem, 7vw, 5.45rem);
  font-weight: 900;
}

.hero-title span {
  display: block;
  white-space: nowrap;
}

.section-title {
  max-width: 16ch;
  margin-top: 0.9rem;
  font-size: clamp(2rem, 4.8vw, 4rem);
  font-weight: 900;
}

.lead {
  max-width: 64ch;
  margin-top: 1.35rem;
  color: #c3d1d3;
  font-size: clamp(1.04rem, 1.8vw, 1.26rem);
}

.hero-actions,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 2.4rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--line);
}

.metric {
  min-height: 98px;
  padding: 1rem;
  background: rgba(8, 16, 24, 0.88);
}

.metric strong {
  display: block;
  color: var(--text);
  font-family: var(--mono);
  font-size: 1.24rem;
}

.metric span {
  color: var(--faint);
  font-size: 0.86rem;
}

.lab-console {
  position: relative;
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  background:
    radial-gradient(circle at 70% 14%, rgba(116, 247, 225, 0.22), transparent 14rem),
    linear-gradient(180deg, rgba(16, 29, 42, 0.94), rgba(7, 13, 19, 0.94));
  box-shadow: var(--shadow);
}

.console-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 0 1rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  color: var(--faint);
  font-size: 0.76rem;
}

.traffic {
  display: inline-flex;
  gap: 0.45rem;
}

.traffic i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--faint);
}

.traffic i:nth-child(1) { background: var(--rose); }
.traffic i:nth-child(2) { background: var(--amber); }
.traffic i:nth-child(3) { background: var(--green); }

.product-orbit {
  position: relative;
  display: grid;
  gap: 1rem;
  padding: 1.2rem;
}

.product-node {
  position: relative;
  padding: 1.1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(5, 9, 13, 0.64);
}

.product-node::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(116, 247, 225, 0.28), transparent 34%, rgba(227, 189, 114, 0.14));
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  padding: 1px;
}

.node-kicker {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.product-node h3 {
  margin-top: 0.45rem;
  font-size: 1.3rem;
}

.product-node p {
  margin-top: 0.55rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.pulse-line {
  height: 8px;
  margin-top: 0.9rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
}

.pulse-line span {
  display: block;
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), rgba(116, 247, 225, 0.1));
  animation: scan 3.8s var(--ease) infinite;
}

.section {
  padding: clamp(3.4rem, 8vw, 6.5rem) 0;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: 2rem;
}

.section-head .lead {
  margin-top: 0;
}

.grid {
  display: grid;
  gap: 1rem;
}

.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card,
.panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset;
}

.card {
  min-height: 100%;
  padding: clamp(1.15rem, 2vw, 1.45rem);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: rgba(13, 24, 35, 0.9);
}

.card h3 {
  margin-top: 0.8rem;
  font-size: 1.35rem;
}

.card p {
  margin-top: 0.75rem;
}

.card-index,
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.badge {
  color: var(--amber);
  border-color: rgba(227, 189, 114, 0.42);
  background: rgba(227, 189, 114, 0.08);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 0.32rem 0.55rem;
  border: 1px solid rgba(116, 247, 225, 0.14);
  border-radius: 999px;
  color: #c6d6d8;
  background: rgba(116, 247, 225, 0.055);
  font-size: 0.82rem;
}

.product-card {
  overflow: hidden;
  padding: 0;
}

.product-body {
  padding: 1.25rem;
}

.product-screen {
  min-height: 190px;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(116, 247, 225, 0.1), transparent 58%),
    rgba(2, 6, 9, 0.44);
}

.mini-bars,
.mini-list {
  display: grid;
  gap: 0.55rem;
}

.mini-bars span,
.mini-list span {
  display: block;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(116, 247, 225, 0.8), rgba(116, 247, 225, 0.06));
}

.mini-list span {
  height: auto;
  min-height: 34px;
  padding: 0.48rem 0.65rem;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.055);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(1.4rem, 4vw, 3rem);
  align-items: start;
}

.panel {
  padding: clamp(1.2rem, 3vw, 2rem);
}

.check-list,
.timeline,
.plain-list {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.4rem;
  padding: 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  position: relative;
  padding-left: 1.55rem;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 18px rgba(116, 247, 225, 0.6);
}

.step {
  position: relative;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
}

.step h3 {
  font-size: 1.08rem;
}

.step p {
  margin-top: 0.35rem;
}

.quote-band {
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(116, 247, 225, 0.08), rgba(227, 189, 114, 0.05), transparent);
}

.quote {
  padding: clamp(2.4rem, 6vw, 5rem) 0;
  color: var(--text);
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 3.4rem);
  line-height: 1.25;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  gap: 1rem;
}

.info-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
}

.info-card + .info-card {
  margin-top: 0.75rem;
}

.info-card span {
  display: block;
  color: var(--faint);
  font-size: 0.86rem;
}

.info-card strong,
.info-card a {
  display: block;
  margin-top: 0.15rem;
  color: var(--text);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.form-grid {
  display: grid;
  gap: 0.9rem;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  color: var(--text);
  font-weight: 700;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.82rem 0.9rem;
  color: var(--text);
  background: rgba(0, 0, 0, 0.18);
}

.field textarea {
  min-height: 150px;
  resize: vertical;
}

.form-status {
  min-height: 1.6rem;
  color: var(--cyan);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.22);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 0.7fr);
  gap: 1.5rem;
  padding: 2.6rem 0;
}

.footer-grid h4 {
  font-family: var(--sans);
  font-size: 0.95rem;
}

.footer-grid ul {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.8rem;
  padding: 0;
  list-style: none;
}

.footer-grid a:hover {
  color: var(--cyan);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0 1.6rem;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 0.86rem;
}

[data-reveal] {
  transform: translateY(18px);
  opacity: 0;
  transition: transform 0.65s var(--ease), opacity 0.65s var(--ease);
}

[data-reveal].is-visible {
  transform: translateY(0);
  opacity: 1;
}

@keyframes scan {
  0%, 100% { transform: translateX(-18%); opacity: 0.8; }
  50% { transform: translateX(52%); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] {
    transform: none;
    opacity: 1;
  }
}

@media (max-width: 940px) {
  .nav {
    grid-template-columns: auto 1fr auto;
  }
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: block;
    justify-self: end;
  }
  .nav-links {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 76px;
    display: none;
    padding: 0.6rem;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(5, 7, 10, 0.96);
    box-shadow: var(--shadow);
  }
  .nav-links.open {
    display: grid;
  }
  .nav-links a {
    width: 100%;
    justify-content: center;
  }
  .hero-grid,
  .section-head,
  .split,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .cols-3,
  .cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .metric-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .lab-console {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 1.25rem, var(--max));
  }
  .hero {
    padding-top: 3rem;
  }
  h1 {
    font-size: clamp(2.8rem, 15vw, 4.6rem);
  }
  .cols-2,
  .cols-3,
  .cols-4 {
    grid-template-columns: 1fr;
  }
  .footer-bottom,
  .hero-actions,
  .actions {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
}