@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;600&family=Noto+Sans+SC:wght@400;500;700;800;900&family=Unbounded:wght@600;700&display=swap');

:root {
  --bg: #050914;
  --bg-rgb: 5, 9, 20;
  --surface: #0b1523;
  --surface-rgb: 11, 21, 35;
  --surface-alt: #111827;
  --surface-hover: #122238;
  --border: rgba(142, 232, 255, 0.18);
  --border-hover: rgba(142, 232, 255, 0.44);
  --text: #f4fbff;
  --text-secondary: #b8c7d6;
  --text-tertiary: #71849a;
  --accent: #8ee8ff;
  --accent-rgb: 142, 232, 255;
  --accent-hover: #c4f5ff;
  --gold: #f4be52;
  --gold-rgb: 244, 190, 82;
  --teal: #24d6b5;
  --teal-rgb: 36, 214, 181;
  --success: #24d6b5;
  --warning: #f4be52;
  --error: #ff6b6b;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(var(--accent-rgb), 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(var(--accent-rgb), 0.028) 1px, transparent 1px),
    var(--bg);
  background-size: 72px 72px;
  color: var(--text);
  font-family: "Noto Sans SC", "IBM Plex Mono", sans-serif;
  line-height: 1.8;
  letter-spacing: 0;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background: linear-gradient(115deg, transparent 0 42%, rgba(var(--accent-rgb), 0.07) 50%, transparent 64%);
}

img,
svg {
  display: block;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
}

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

[id] {
  scroll-margin-top: 92px;
}

.container {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 100;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  transform: scaleX(0);
  transform-origin: left;
}

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}

.site-nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(var(--bg-rgb), 0.82);
  backdrop-filter: blur(12px);
}

.nav-inner {
  width: min(1180px, calc(100% - 48px));
  min-height: 72px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  min-height: 44px;
}

.brand-mark {
  width: 34px;
  height: 34px;
}

.brand-name {
  font-weight: 900;
  font-size: 1.08rem;
}

.desktop-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  transition: color 0.18s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-cta,
.btn {
  min-height: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.nav-cta {
  padding: 0 0.92rem;
  background: rgba(var(--accent-rgb), 0.1);
}

.nav-cta svg,
.btn svg,
.menu-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-cta:hover,
.btn:hover {
  transform: translateY(-2px);
  border-color: var(--border-hover);
  background: rgba(var(--accent-rgb), 0.18);
}

.nav-cta:active,
.btn:active {
  transform: translateY(0) scale(0.98);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(var(--surface-rgb), 0.72);
  color: var(--text);
  align-items: center;
  justify-content: center;
}

.mobile-nav {
  display: none;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(var(--surface-rgb), 0.96);
  padding: 10px;
}

.mobile-nav a {
  display: flex;
  min-height: 44px;
  align-items: center;
  padding-inline: 12px;
  color: var(--text-secondary);
  text-decoration: none;
}

.mobile-nav a:hover,
.mobile-nav a:focus-visible {
  color: var(--text);
  background: rgba(var(--accent-rgb), 0.08);
}

.hero {
  position: relative;
  min-height: auto;
  display: grid;
  align-items: end;
  padding: 116px 0 38px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.92;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(var(--bg-rgb), 0.92), rgba(var(--bg-rgb), 0.5) 46%, rgba(var(--bg-rgb), 0.78)),
    linear-gradient(180deg, rgba(var(--bg-rgb), 0.2), var(--bg) 96%);
}

.data-rain {
  position: absolute;
  inset: 0;
  opacity: 0.42;
  background-image: linear-gradient(120deg, transparent 0 47%, rgba(var(--accent-rgb), 0.25) 48%, transparent 51%);
  background-size: 260px 260px;
  animation: dataShift 18s linear infinite;
}

.hero-layout {
  display: grid;
  gap: 36px;
}

.hero-copy {
  max-width: 900px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--accent);
  font-family: "IBM Plex Mono", "Noto Sans SC", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0;
}

.hero-title {
  margin: 0;
  max-width: 980px;
  font-size: 7rem;
  font-weight: 900;
  line-height: 0.96;
  text-shadow: 0 0 40px rgba(var(--accent-rgb), 0.2);
}

.split-line {
  display: block;
  overflow: hidden;
}

.split-line > span {
  display: inline-block;
  transform: translateY(110%);
  animation: lineUp 0.82s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.split-line:nth-child(2) > span {
  animation-delay: 0.14s;
  background: linear-gradient(135deg, var(--accent), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  max-width: 680px;
  margin: 26px 0 0;
  color: var(--text-secondary);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn {
  padding: 0.9rem 1.1rem;
  color: var(--text);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--gold));
  color: var(--bg);
  border-color: transparent;
  font-weight: 800;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), var(--gold));
  box-shadow: 0 0 32px rgba(var(--gold-rgb), 0.18);
}

.btn-ghost {
  background: rgba(var(--surface-rgb), 0.64);
}

.signal-strip {
  width: min(680px, 100%);
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.signal-strip span {
  min-height: 54px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: var(--text-secondary);
  font-family: "IBM Plex Mono", "Noto Sans SC", sans-serif;
  background: rgba(var(--surface-rgb), 0.54);
}

.hero-console {
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.hero-console > div {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(var(--surface-rgb), 0.68);
  padding: 18px;
}

.hero-console span,
.step-list span,
.scene-card span,
.ops-row span {
  color: var(--gold);
  font-family: "IBM Plex Mono", "Noto Sans SC", sans-serif;
  font-size: 0.78rem;
}

.hero-console strong {
  display: block;
  margin-top: 4px;
}

.hero-console small {
  display: block;
  color: var(--text-tertiary);
  line-height: 1.7;
  margin-top: 4px;
}

.ticker-section {
  border-block: 1px solid var(--border);
  background: rgba(var(--surface-rgb), 0.42);
  overflow: hidden;
  contain: layout paint;
}

.ticker {
  width: 100%;
  height: 68px;
  overflow: hidden;
  white-space: nowrap;
  position: relative;
  contain: layout paint;
}

.ticker-track {
  position: absolute;
  inset: 0 auto auto 0;
  display: flex;
  min-width: max-content;
  animation: ticker 24s linear infinite;
}

.ticker span {
  display: inline-flex;
  align-items: center;
  padding: 18px 26px;
  color: var(--text-tertiary);
  font-family: "IBM Plex Mono", "Noto Sans SC", sans-serif;
  font-weight: 600;
}

.section {
  padding: 112px 0;
  position: relative;
}

.section-head {
  max-width: 760px;
  margin-bottom: 44px;
}

.section-head h2,
.loop-copy h2,
.proof-copy h2,
.contact-copy h2 {
  margin: 0;
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.08;
}

.section-head p:not(.eyebrow),
.loop-copy > p:not(.eyebrow),
.proof-copy p:not(.eyebrow),
.contact-copy p:not(.eyebrow) {
  color: var(--text-secondary);
  margin: 18px 0 0;
  max-width: 680px;
}

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

.value-card,
.bento-card,
.scene-card,
.ops-board,
.contact-form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(var(--surface-rgb), 0.82);
}

.value-card {
  min-height: 430px;
  padding: 30px;
}

.card-icon {
  width: 52px;
  height: 52px;
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  background: rgba(var(--accent-rgb), 0.08);
  color: var(--accent);
}

.card-icon.is-gold {
  color: var(--gold);
  border-color: rgba(var(--gold-rgb), 0.44);
  background: rgba(var(--gold-rgb), 0.08);
}

.card-icon svg {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card-kicker {
  margin: 28px 0 8px;
  color: var(--gold);
  font-family: "IBM Plex Mono", "Noto Sans SC", sans-serif;
  font-weight: 600;
}

.value-card h3,
.bento-card h3,
.scene-card h3 {
  margin: 0;
  font-size: 1.55rem;
  line-height: 1.35;
}

.value-card > p:not(.card-kicker),
.bento-card p,
.scene-card p {
  color: var(--text-secondary);
}

.check-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding-left: 22px;
  color: var(--text-secondary);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--accent);
  transform: rotate(45deg);
}

.capability-section,
.proof-section {
  background: linear-gradient(180deg, rgba(var(--surface-rgb), 0.36), transparent);
}

.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.bento-card {
  min-height: 220px;
  padding: 26px;
}

.span-3 {
  grid-column: span 3;
}

.span-2 {
  grid-column: span 2;
}

.tag {
  width: fit-content;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-secondary);
  background: rgba(var(--accent-rgb), 0.06);
  padding: 0.45rem 0.7rem;
  font: 600 0.75rem/1.2 "IBM Plex Mono", "Noto Sans SC", sans-serif;
  letter-spacing: 0;
  display: inline-flex;
  margin-bottom: 26px;
}

.tag.is-result {
  border-color: rgba(var(--gold-rgb), 0.42);
  color: var(--gold);
  background: rgba(var(--gold-rgb), 0.08);
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.85fr);
  gap: 64px;
  align-items: center;
}

.step-list {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.step-list > div {
  display: grid;
  grid-template-columns: 54px 160px 1fr;
  gap: 16px;
  align-items: start;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(var(--surface-rgb), 0.58);
}

.step-list strong {
  line-height: 1.4;
}

.step-list p {
  margin: 0;
  color: var(--text-secondary);
}

.loop-visual {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(var(--surface-rgb), 0.8);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
  aspect-ratio: 1 / 1;
}

.loop-visual img {
  width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.scene-card {
  padding: 24px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
}

.scene-card span {
  margin-bottom: auto;
}

.scene-card h3 {
  margin-top: 42px;
}

.proof-layout,
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 54px;
  align-items: start;
}

.ops-board {
  padding: 12px;
}

.ops-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 18px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.ops-row:last-child {
  border-bottom: 0;
}

.contact-section {
  padding-bottom: 132px;
}

.contact-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.contact-form {
  padding: 26px;
  display: grid;
  gap: 16px;
}

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

.contact-form label > span {
  color: var(--text-secondary);
  font-weight: 600;
}

.field {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(var(--surface-rgb), 0.68);
  color: var(--text);
  padding: 0.9rem 1rem;
  resize: vertical;
}

.field:hover {
  border-color: var(--border-hover);
}

.field:focus {
  outline: 2px solid rgba(var(--accent-rgb), 0.45);
  outline-offset: 2px;
}

.field:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.field::placeholder {
  color: var(--text-tertiary);
}

.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(var(--surface-rgb), 0.46);
}

.footer-inner {
  min-height: 180px;
  padding-block: 38px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.footer-brand {
  width: fit-content;
}

.footer-inner p,
.footer-meta {
  color: var(--text-tertiary);
}

.footer-meta {
  display: grid;
  gap: 6px;
  text-align: right;
  font-size: 0.9rem;
}

.beian-link {
  color: var(--text-tertiary);
}

.beian-link:hover {
  color: var(--accent-cyan);
}

.spotlight {
  --mx: 50%;
  --my: 50%;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.spotlight::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx) var(--my), rgba(var(--accent-rgb), 0.18), transparent 36%);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.spotlight:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--surface-hover);
  box-shadow: 0 0 32px rgba(var(--accent-rgb), 0.11);
}

.spotlight:hover::before {
  opacity: 1;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@keyframes lineUp {
  to {
    transform: translateY(0);
  }
}

@keyframes dataShift {
  from {
    transform: translate3d(-140px, -140px, 0);
  }
  to {
    transform: translate3d(140px, 140px, 0);
  }
}

@keyframes ticker {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

@media (max-width: 1024px) {
  .hero-title {
    font-size: 5.6rem;
  }

  .section-head h2,
  .loop-copy h2,
  .proof-copy h2,
  .contact-copy h2 {
    font-size: 3.2rem;
  }

  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .two-col,
  .proof-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .container,
  .nav-inner,
  .mobile-nav {
    width: min(100% - 36px, 1180px);
  }

  .desktop-nav,
  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .mobile-nav.is-open {
    display: grid;
  }

  .hero {
    min-height: auto;
    padding: 88px 0 18px;
  }

  .hero-title {
    font-size: 3.35rem;
  }

  .hero-lede {
    font-size: 1rem;
    margin-top: 18px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin-top: 22px;
  }

  .btn {
    width: 100%;
    min-height: 52px;
  }

  .hero-console,
  .value-grid,
  .bento,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .signal-strip {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 20px;
  }

  .signal-strip span {
    min-height: 48px;
  }

  .hero-console {
    display: none;
  }

  .bento > * {
    grid-column: 1 / -1;
  }

  .section {
    padding: 72px 0;
  }

  .section-head h2,
  .loop-copy h2,
  .proof-copy h2,
  .contact-copy h2 {
    font-size: 2.1rem;
  }

  .value-card {
    min-height: auto;
    padding: 24px;
  }

  .step-list > div,
  .ops-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .scene-card {
    min-height: 220px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }
}

@media (max-width: 430px) {
  .hero-title {
    font-size: 3.05rem;
  }

  .brand-name {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}