:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: rgba(248, 250, 252, 0.95);
  --line: rgba(148, 163, 184, 0.25);
  --line-strong: rgba(148, 163, 184, 0.45);
  --text: #1e293b;
  --muted: #64748b;
  --accent: #3b82f6;
  --accent-strong: #2563eb;
  --accent-warm: #f59e0b;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --content: min(1180px, calc(100vw - 40px));
  --header-height: 84px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 50%, #f1f5f9 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle at center, black 38%, transparent 85%);
  opacity: 0.4;
}

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

img {
  display: block;
}

.page-shell {
  position: relative;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: var(--content);
  margin: 0 auto;
  padding: 18px 0;
  min-height: var(--header-height);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 10px -18px;
  z-index: -1;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  color: var(--text);
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  font-size: 0.96rem;
  color: rgba(30, 41, 59, 0.8);
}

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

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--accent), transparent);
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
}

.menu-toggle span {
  position: absolute;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle span:first-child {
  transform: translateY(-4px);
}

.menu-toggle span:last-child {
  transform: translateY(4px);
}

body.nav-open .menu-toggle span:first-child {
  transform: rotate(45deg);
}

body.nav-open .menu-toggle span:last-child {
  transform: rotate(-45deg);
}

main {
  padding-bottom: 72px;
}

section {
  width: var(--content);
  margin: 0 auto;
  padding: 72px 0;
}

.section-heading {
  display: grid;
  gap: 14px;
  margin-bottom: 34px;
}

.section-heading h2,
.hero-copy h1 {
  margin: 0;
  letter-spacing: -0.035em;
}

.section-heading h2 {
  font-size: clamp(2rem, 3.4vw, 3.6rem);
  max-width: 12ch;
  color: var(--text);
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero {
  min-height: calc(100svh - var(--header-height));
  padding-top: 32px;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 32px;
  align-items: center;
  width: 100%;
}

.hero-copy h1 {
  font-size: clamp(3.2rem, 7vw, 6.6rem);
  line-height: 0.94;
  max-width: 9ch;
  margin-top: 12px;
  color: var(--text);
}

.hero-text {
  max-width: 38rem;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
}

.button-primary:hover {
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.45);
}

.button-secondary {
  border-color: rgba(59, 130, 246, 0.3);
  background: rgba(255, 255, 255, 0.6);
  color: var(--text);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(59, 130, 246, 0.5);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 42px 0 0;
  padding: 0;
  list-style: none;
}

.hero-meta li {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.8));
  box-shadow: var(--shadow);
}

.hero-meta span,
.lane-index,
.workflow-track span {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-meta strong {
  display: block;
  margin-top: 12px;
  font-size: 1.02rem;
  color: var(--text);
}

.hero-meta small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.7;
}

.hero-visual {
  position: relative;
  min-height: 630px;
  display: grid;
  place-items: center;
}

.hero-orbit {
  position: absolute;
  inset: 50%;
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-large {
  width: min(96%, 520px);
  height: min(96%, 520px);
}

.orbit-mid {
  width: min(72%, 388px);
  height: min(72%, 388px);
}

.orbit-small {
  width: min(48%, 260px);
  height: min(48%, 260px);
}

.hero-orbit::after {
  content: "";
  position: absolute;
  inset: -3px auto auto 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 14px rgba(59, 130, 246, 0.12);
}

.hero-panel {
  position: relative;
  width: min(86%, 360px);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9)),
    linear-gradient(135deg, rgba(59, 130, 246, 0.06), transparent 60%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: auto -12% -32% auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.12), transparent 70%);
}

.hero-panel p {
  margin: 0;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.hero-panel strong {
  display: block;
  margin-top: 16px;
  font-size: clamp(1.4rem, 2.6vw, 2.2rem);
  line-height: 1.18;
  color: var(--text);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.hero-tags span {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(248, 250, 252, 0.8);
  font-size: 0.92rem;
  color: var(--muted);
}

.hero-signal {
  position: absolute;
  right: 12px;
  bottom: 54px;
  display: grid;
  gap: 12px;
}

.hero-signal span {
  padding: 10px 16px;
  border-left: 2px solid rgba(245, 158, 11, 0.4);
  color: var(--muted);
  background: linear-gradient(90deg, rgba(245, 158, 11, 0.06), transparent);
  backdrop-filter: blur(8px);
}

.about-grid,
.platform-board,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.7));
  box-shadow: var(--shadow);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 28px;
  padding: 36px;
}

.lead {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.2rem, 2vw, 1.58rem);
  line-height: 1.8;
}

.about-columns {
  display: grid;
  gap: 18px;
}

.about-columns article,
.value-columns article {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.about-columns span,
.value-columns h3,
.service-lane h3,
.workflow-track h3 {
  margin: 0;
  font-size: 1.02rem;
  color: var(--text);
}

.about-columns p,
.lane-body p,
.workflow-track p,
.value-columns p,
.contact-text,
.platform-list,
.platform-copy .lead {
  color: var(--muted);
  line-height: 1.8;
}

.services {
  position: relative;
}

.service-lanes {
  display: grid;
  gap: 16px;
}

.service-lane {
  display: grid;
  grid-template-columns: 92px minmax(0, 1.2fr) minmax(210px, 0.8fr);
  gap: 24px;
  align-items: start;
  padding: 30px 28px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(248, 250, 252, 0.5));
}

.service-lane:first-child {
  border-top: 1px solid var(--line-strong);
  border-top-left-radius: var(--radius-xl);
  border-top-right-radius: var(--radius-xl);
}

.service-lane:last-child {
  border-bottom-left-radius: var(--radius-xl);
  border-bottom-right-radius: var(--radius-xl);
}

.lane-body h3,
.workflow-track h3,
.value-columns h3 {
  font-size: 1.34rem;
  color: var(--text);
}

.lane-body p {
  margin: 10px 0 0;
}

.lane-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  justify-content: flex-start;
}

.lane-points li {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.6);
}

.workflow-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.workflow-track article {
  position: relative;
  min-height: 220px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.7)),
    radial-gradient(circle at top right, rgba(59, 130, 246, 0.08), transparent 40%);
  overflow: hidden;
}

.workflow-track article::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent 85%);
}

.workflow-track p {
  margin: 12px 0 0;
}

.platform-board {
  padding: 36px;
}

.platform-copy {
  display: grid;
  gap: 18px;
}

.platform-list {
  margin: 0;
  padding-left: 1.25rem;
}

.platform-marquee {
  margin-top: 38px;
  display: grid;
  gap: 14px;
  overflow: hidden;
}

.marquee-row {
  display: flex;
  gap: 18px;
  min-width: max-content;
  animation: marquee 18s linear infinite;
}

.marquee-row-reverse {
  animation-direction: reverse;
  animation-duration: 22s;
}

.marquee-row span {
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  color: var(--muted);
}

.value-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.contact-card {
  padding: 38px;
}

.contact-card h2 {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(2rem, 3.8vw, 4.2rem);
  letter-spacing: -0.04em;
  color: var(--text);
}

.contact-text {
  max-width: 44rem;
  margin: 20px 0 0;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.contact-links a {
  padding: 14px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  color: var(--accent);
  transition: all 180ms ease;
}

.contact-links a:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent);
}

.contact-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 30px 0 0;
}

.contact-meta dt {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.contact-meta dd {
  margin: 10px 0 0;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--text);
}

.site-footer {
  width: var(--content);
  margin: 0 auto;
  padding: 0 0 36px;
  color: var(--muted);
  font-size: 0.92rem;
}

.section-observe {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 680ms ease, transform 680ms ease;
}

.section-observe.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-24%);
  }
}

@media (max-width: 1080px) {
  .hero-grid,
  .about-grid,
  .contact-meta,
  .value-columns {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-copy h1,
  .section-heading h2,
  .contact-card h2 {
    max-width: none;
  }

  .service-lane {
    grid-template-columns: 70px 1fr;
  }

  .lane-points {
    grid-column: 2;
  }

  .workflow-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .site-header {
    padding: 14px 0;
  }

  .site-header::before {
    inset: 8px -8px;
  }

  .menu-toggle {
    display: inline-flex;
    position: relative;
    flex: 0 0 auto;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    display: grid;
    gap: 0;
    min-width: min(320px, calc(100vw - 32px));
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 26px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  body.nav-open .site-nav {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 12px 14px;
    border-radius: 14px;
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: rgba(59, 130, 246, 0.08);
  }

  .site-nav a::after {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 460px;
  }

  .hero-signal {
    right: 0;
    bottom: 24px;
  }

  .hero-meta,
  .workflow-track,
  .contact-meta {
    grid-template-columns: 1fr;
  }

  .service-lane {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .lane-points {
    grid-column: auto;
  }

  .platform-board,
  .contact-card,
  .about-grid {
    padding: 28px 22px;
  }
}

@media (max-width: 560px) {
  :root {
    --content: min(100vw - 24px, 1180px);
  }

  section {
    padding: 56px 0;
  }

  .brand-copy small {
    display: none;
  }

  .hero-copy h1 {
    font-size: clamp(2.6rem, 14vw, 4.3rem);
  }

  .hero-text,
  .lead {
    font-size: 1rem;
  }

  .hero-panel {
    width: 100%;
    padding: 24px;
  }

  .hero-tags span,
  .lane-points li,
  .contact-links a,
  .marquee-row span {
    font-size: 0.92rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .section-observe {
    opacity: 1;
    transform: none;
  }
}