:root {
  --bg: #07131f;
  --bg-deep: #03101a;
  --surface: rgba(12, 26, 39, 0.72);
  --surface-strong: rgba(11, 29, 44, 0.92);
  --surface-soft: rgba(255, 255, 255, 0.04);
  --line: rgba(121, 163, 175, 0.22);
  --line-soft: rgba(255, 255, 255, 0.08);
  --text: #ebf5f7;
  --muted: #9bb1b9;
  --accent: #23b8ac;
  --accent-deep: #11847b;
  --accent-soft: #84e5dc;
  --gold: #f0b468;
  --shadow: 0 24px 90px rgba(0, 0, 0, 0.32);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --content-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
  color: var(--text);
  line-height: 1.6;
  background:
    radial-gradient(circle at 12% 18%, rgba(35, 184, 172, 0.22), transparent 0 24%),
    radial-gradient(circle at 88% 12%, rgba(240, 180, 104, 0.18), transparent 0 18%),
    linear-gradient(180deg, #08121d 0%, #07131f 42%, #04101a 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 82%);
  pointer-events: none;
  z-index: 0;
}

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

.page-glow {
  position: fixed;
  width: 34rem;
  height: 34rem;
  border-radius: 50%;
  filter: blur(22px);
  opacity: 0.42;
  pointer-events: none;
  z-index: 0;
}

.page-glow-top {
  top: -10rem;
  right: -6rem;
  background: radial-gradient(circle, rgba(35, 184, 172, 0.34), transparent 68%);
}

.page-glow-bottom {
  left: -8rem;
  bottom: -14rem;
  background: radial-gradient(circle, rgba(240, 180, 104, 0.28), transparent 68%);
}

.shell,
.site-header,
.site-footer {
  position: relative;
  z-index: 1;
}

.shell {
  width: min(var(--content-width), calc(100% - 2.4rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(5, 15, 23, 0.58);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-shell {
  min-height: 5.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
}

.brand-mark {
  width: 2.35rem;
  height: 2.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.95rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--gold) 100%);
  color: #041019;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.brand-text {
  font-family: "Iowan Old Style", "Palatino Linotype", "Source Han Serif SC", serif;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a {
  transition: color 180ms ease;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.8rem 1.28rem;
  border-radius: 999px;
  font-size: 0.96rem;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #37d5c8 100%);
  color: #021118;
  box-shadow: 0 14px 40px rgba(35, 184, 172, 0.28);
}

.button-ghost,
.button-outline {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.button-ghost:hover,
.button-outline:hover {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.06);
}

.header-cta {
  white-space: nowrap;
}

main {
  padding: 2rem 0 4.5rem;
}

.hero {
  padding-top: 3rem;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 1.4rem;
  align-items: stretch;
}

.eyebrow {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.77rem;
  color: var(--accent-soft);
}

.hero-copy,
.hero-board,
.signal-panel,
.feature-card,
.panel-dark,
.stack-card,
.scenario-card,
.contact-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-copy {
  padding: 4rem;
}

.hero h1,
.section-heading h2,
.stack-intro h2,
.contact-copy h2,
.board-card h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Source Han Serif SC", serif;
}

.hero h1 {
  max-width: 10ch;
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 0.95;
}

.hero-lead {
  max-width: 44rem;
  margin: 1.3rem 0 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-tags {
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.hero-tags li {
  padding: 0.58rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.05);
  color: #dce9ed;
  font-size: 0.94rem;
}

.hero-board {
  padding: 1.4rem;
  display: grid;
  gap: 1rem;
  background:
    linear-gradient(180deg, rgba(15, 34, 48, 0.94), rgba(7, 20, 31, 0.92)),
    var(--surface);
}

.board-header {
  padding: 0.5rem 0.5rem 0;
}

.board-header p {
  margin: 0;
  font-size: 0.9rem;
  color: #f7fbfc;
}

.board-header span {
  color: var(--muted);
  font-size: 0.92rem;
}

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

.board-card {
  padding: 1.45rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
}

.board-card-primary {
  background:
    linear-gradient(135deg, rgba(35, 184, 172, 0.16), rgba(240, 180, 104, 0.1)),
    rgba(255, 255, 255, 0.05);
}

.board-label,
.stack-kicker,
.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 0 0.8rem;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-soft);
}

.board-card h2 {
  font-size: 1.4rem;
  margin-bottom: 0.55rem;
}

.board-card p:last-child,
.feature-card p,
.stack-card p,
.stack-intro p,
.scenario-card p,
.contact-copy p,
.contact-grid p,
.section-heading p {
  margin: 0;
  color: var(--muted);
}

.signal-band,
.section {
  margin-top: 1.5rem;
}

.signal-panel {
  padding: 1.4rem 1.6rem;
  background:
    linear-gradient(135deg, rgba(240, 180, 104, 0.08), rgba(35, 184, 172, 0.08)),
    var(--surface);
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.85rem;
}

.signal-grid span {
  padding: 0.9rem 1rem;
  border-radius: 1rem;
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.04);
  color: #eff7f9;
  text-align: center;
}

.section-heading {
  max-width: 50rem;
  margin-bottom: 1rem;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.05;
}

.section-heading p {
  margin-top: 1rem;
  font-size: 1.02rem;
}

.solution-grid,
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.feature-card,
.scenario-card {
  padding: 2rem;
}

.feature-index {
  width: 3rem;
  height: 3rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.04);
}

.feature-card h3,
.stack-card h3,
.process-list h3,
.scenario-card h3,
.contact-grid h3 {
  margin: 0 0 0.55rem;
  font-size: 1.25rem;
  color: #f3fbfc;
}

.stack-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: 1.2rem;
}

.panel-dark {
  padding: 2.4rem;
  background:
    radial-gradient(circle at top left, rgba(35, 184, 172, 0.14), transparent 35%),
    linear-gradient(180deg, rgba(11, 28, 42, 0.96), rgba(6, 18, 28, 0.96));
}

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

.stack-card {
  padding: 1.8rem;
}

.process-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.process-list li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1rem;
  padding: 1.2rem 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.process-list span {
  width: 72px;
  height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 1.35rem;
  background: linear-gradient(135deg, rgba(35, 184, 172, 0.24), rgba(240, 180, 104, 0.24));
  color: #f4fbfd;
  font-weight: 700;
}

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

.contact-panel {
  padding: 2.3rem;
  background:
    linear-gradient(135deg, rgba(35, 184, 172, 0.1), rgba(240, 180, 104, 0.08)),
    var(--surface-strong);
}

.contact-copy {
  max-width: 44rem;
}

.contact-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.contact-grid article {
  padding: 1.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.site-footer {
  padding: 0 0 2.6rem;
}

.footer-shell {
  padding-top: 0.6rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  color: var(--muted);
}

.brand-footer {
  margin-bottom: 0.6rem;
}

.footer-copy {
  margin: 0;
  max-width: 28rem;
}

.footer-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1rem 1.25rem;
  font-size: 0.94rem;
}

.reveal {
  animation: fade-up 680ms ease both;
}

.reveal-delay {
  animation-delay: 120ms;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

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

@media (max-width: 1080px) {
  .hero,
  .stack-layout,
  .contact-grid,
  .signal-grid,
  .solution-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .hero-board,
  .panel-dark,
  .feature-card,
  .scenario-card,
  .contact-panel {
    padding: 1.8rem;
  }

  .hero h1 {
    max-width: 12ch;
  }
}

@media (max-width: 860px) {
  .nav-shell {
    min-height: auto;
    padding: 1rem 0;
    flex-wrap: wrap;
  }

  .site-nav {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
    gap: 0.8rem 1rem;
  }

  .header-cta {
    margin-left: auto;
  }

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

  .footer-meta {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(var(--content-width), calc(100% - 1.2rem));
  }

  main {
    padding-top: 1.2rem;
  }

  .hero {
    padding-top: 1rem;
  }

  .hero-copy,
  .hero-board,
  .signal-panel,
  .feature-card,
  .panel-dark,
  .stack-card,
  .scenario-card,
  .contact-panel {
    padding: 1.35rem;
    border-radius: 1.6rem;
  }

  .hero h1 {
    font-size: clamp(2.3rem, 12vw, 3.4rem);
  }

  .hero-actions,
  .hero-tags {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .process-list li {
    grid-template-columns: 1fr;
  }

  .process-list span {
    width: 60px;
    height: 60px;
  }
}