:root {
  --ink: #101317;
  --muted: #5e6875;
  --soft: #f3f4f1;
  --line: rgba(16, 19, 23, 0.12);
  --panel: rgba(255, 255, 255, 0.72);
  --accent: #0f766e;
  --accent-strong: #0d4d49;
  --gold: #b68a35;
  --blue: #2f6b9b;
  --shadow: 0 24px 80px rgba(20, 27, 34, 0.12);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.08), transparent 32%),
    linear-gradient(315deg, rgba(182, 138, 53, 0.1), transparent 34%),
    var(--soft);
  line-height: 1.7;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 18px clamp(20px, 5vw, 64px);
  border-bottom: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(243, 244, 241, 0.82);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-weight: 700;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: #ffffff;
  background: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.26);
  font-size: 13px;
  border-radius: 8px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 36px);
  color: rgba(16, 19, 23, 0.72);
  font-size: 14px;
}

.site-nav a {
  transition: color 160ms ease;
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.54);
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  transition: transform 180ms ease;
}

.nav-toggle.is-open span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle.is-open span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.section-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  align-items: center;
  gap: clamp(40px, 6vw, 84px);
  padding: 116px 0 72px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  font-size: 21px;
  line-height: 1.35;
}

.hero-text {
  max-width: 620px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 18px;
}

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

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 700;
}

.primary-link {
  color: #ffffff;
  background: var(--ink);
}

.secondary-link {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.36);
}

.hero-visual {
  position: relative;
  min-height: 520px;
  border-left: 1px solid var(--line);
  overflow: hidden;
}

.signal-grid {
  position: absolute;
  inset: 38px 0 38px 38px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.signal-grid span {
  border: 1px solid rgba(16, 19, 23, 0.1);
  background: rgba(255, 255, 255, 0.28);
  border-radius: 8px;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(16, 19, 23, 0.18);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.orbit-one {
  width: 260px;
  height: 260px;
  top: 70px;
  right: 50px;
}

.orbit-two {
  width: 170px;
  height: 170px;
  bottom: 68px;
  left: 76px;
  border-color: rgba(15, 118, 110, 0.34);
  animation-delay: -2s;
}

.core-panel {
  position: absolute;
  right: 0;
  bottom: 92px;
  width: min(380px, calc(100% - 44px));
  padding: 34px;
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(16, 19, 23, 0.92), rgba(13, 77, 73, 0.88)),
    var(--ink);
  box-shadow: var(--shadow);
  border-radius: 8px;
}

.core-kicker,
.core-panel small {
  display: block;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.core-panel strong {
  display: block;
  margin: 14px 0 30px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.04;
}

.intro,
.product,
.business {
  padding: 112px 0;
}

.intro {
  display: grid;
  grid-template-columns: 0.86fr 1fr;
  gap: clamp(36px, 6vw, 88px);
  border-top: 1px solid var(--line);
}

.intro-content {
  color: var(--muted);
  font-size: 18px;
}

.intro-content p:last-child,
.product-lead,
.business-list p:last-child,
.value-item p:last-child,
.capability-item p:last-child {
  margin-bottom: 0;
}

.product {
  border-top: 1px solid var(--line);
}

.product-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.42fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: end;
  padding: 46px;
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(16, 19, 23, 0.94), rgba(13, 77, 73, 0.9)),
    var(--ink);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.product-showcase .eyebrow {
  color: rgba(255, 255, 255, 0.68);
}

.product-showcase h2 {
  margin-bottom: 22px;
  font-size: clamp(44px, 7vw, 88px);
}

.product-lead {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
}

.product-meta {
  display: grid;
  gap: 12px;
}

.product-meta span {
  display: block;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  font-weight: 700;
}

.product-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 0;
}

.product-point {
  padding: 30px;
  background: rgba(255, 255, 255, 0.44);
}

.product-point span {
  display: block;
  margin-bottom: 34px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
}

.product-point p {
  margin-bottom: 0;
  color: var(--muted);
}

.capabilities,
.values {
  padding: 112px 0;
  background: rgba(255, 255, 255, 0.42);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin-top: 54px;
  background: var(--line);
  border: 1px solid var(--line);
}

.capability-item {
  min-height: 310px;
  padding: 28px;
  background: rgba(243, 244, 241, 0.92);
}

.capability-item span {
  display: block;
  margin-bottom: 58px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
}

.capability-item h3,
.value-item h3 {
  margin-bottom: 12px;
}

.capability-item p,
.value-item p,
.business-list p {
  color: var(--muted);
}

.business-list {
  display: grid;
  gap: 1px;
  margin-top: 52px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.business-list div {
  display: grid;
  grid-template-columns: minmax(180px, 0.34fr) 1fr;
  gap: 32px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.business-list div:first-child {
  border-top: 0;
}

.business-list strong {
  font-size: 22px;
}

.values-layout {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: clamp(36px, 6vw, 82px);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.value-item {
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: 104px;
  padding: 28px 20px;
  color: rgba(16, 19, 23, 0.66);
  font-size: 14px;
}

.site-footer a {
  transition: color 160ms ease;
}

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

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(16px);
  }
}

@media (max-width: 980px) {
  .hero,
  .intro,
  .values-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 128px;
  }

  .hero-visual {
    min-height: 420px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

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

@media (max-width: 720px) {
  .site-header {
    min-height: 68px;
    padding: 14px 20px;
  }

  .brand span:last-child {
    max-width: calc(100vw - 126px);
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 20px;
    right: 20px;
    display: grid;
    gap: 0;
    padding: 8px;
    border: 1px solid var(--line);
    background: rgba(243, 244, 241, 0.96);
    box-shadow: var(--shadow);
    border-radius: 8px;
    transform-origin: top;
    transform: scaleY(0.92);
    opacity: 0;
    pointer-events: none;
    transition: opacity 160ms ease, transform 160ms ease;
  }

  .site-nav.is-open {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 12px 10px;
  }

  .section-shell {
    width: min(100% - 32px, 1120px);
  }

  .hero {
    padding-bottom: 56px;
  }

  h1 {
    font-size: clamp(38px, 13vw, 58px);
  }

  .hero-text,
  .intro-content {
    font-size: 16px;
  }

  .hero-visual {
    min-height: 360px;
  }

  .signal-grid {
    inset: 24px 0 24px 0;
  }

  .core-panel {
    right: 16px;
    bottom: 52px;
    padding: 26px;
  }

  .intro,
  .product,
  .business,
  .capabilities,
  .values {
    padding: 76px 0;
  }

  .capability-grid,
  .product-showcase,
  .product-points,
  .value-grid,
  .business-list div {
    grid-template-columns: 1fr;
  }

  .capability-item {
    min-height: auto;
  }

  .capability-item span {
    margin-bottom: 36px;
  }

  .business-list div {
    gap: 10px;
    padding: 26px 0;
  }

  .product-showcase {
    padding: 30px;
  }

  .site-footer {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }
}

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