:root {
  --bg: #f5fbff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --text: #173244;
  --muted: #607889;
  --blue: #2f8cff;
  --cyan: #29c7d8;
  --mint: #52d7a0;
  --amber: #f2b84b;
  --line: rgba(31, 84, 116, 0.14);
  --shadow: 0 24px 70px rgba(38, 106, 154, 0.14);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 8%, rgba(82, 215, 160, 0.2), transparent 26%),
    radial-gradient(circle at 82% 10%, rgba(47, 140, 255, 0.18), transparent 24%),
    linear-gradient(180deg, #f8fdff 0%, #eef8fb 52%, #ffffff 100%);
}

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

.site-shell {
  min-height: 100vh;
  overflow: hidden;
}

.topbar {
  position: fixed;
  inset: 18px 24px auto;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 10px 36px rgba(45, 106, 145, 0.08);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.contact-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan), var(--mint));
}

.brand-text {
  font-size: 18px;
}

.nav-links {
  gap: 4px;
}

.nav-links a,
.domain {
  padding: 9px 11px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover,
.domain:hover {
  color: var(--text);
  background: rgba(47, 140, 255, 0.08);
}

.domain {
  color: var(--blue);
  font-weight: 800;
}

.hero {
  position: relative;
  min-height: 94vh;
  display: grid;
  align-items: center;
  padding: 144px max(24px, calc((100vw - 1180px) / 2)) 76px;
}

.hero-visual,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-visual {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.92;
  transition: transform 600ms ease;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(248, 253, 255, 0.97) 0%, rgba(248, 253, 255, 0.84) 42%, rgba(248, 253, 255, 0.18) 100%),
    linear-gradient(0deg, var(--bg) 0%, rgba(245, 251, 255, 0) 28%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.28;
}

.hero-copy {
  max-width: 660px;
  color: #456575;
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.72;
}

.hero-actions,
.contact {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 900;
  white-space: nowrap;
}

.btn.primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 18px 42px rgba(47, 140, 255, 0.22);
}

.btn.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.66);
}

.hero-panel {
  position: absolute;
  right: max(24px, calc((100vw - 1180px) / 2));
  bottom: 42px;
  z-index: 3;
  display: grid;
  width: min(548px, calc(100vw - 48px));
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-panel div {
  padding: 18px;
  border-right: 1px solid var(--line);
}

.hero-panel div:last-child {
  border-right: 0;
}

.hero-panel span,
.metric span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.hero-panel strong {
  display: block;
  margin-top: 8px;
  font-size: 16px;
}

.section {
  padding: 92px max(24px, calc((100vw - 1180px) / 2));
}

.section-heading {
  max-width: 790px;
  margin-bottom: 34px;
}

.section-heading p,
.feature-copy p,
.solution-card p,
.scene-list p {
  color: var(--muted);
  line-height: 1.75;
}

.section-heading.compact {
  max-width: 620px;
}

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

.solution-card,
.scene-list article {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 18px 50px rgba(37, 102, 143, 0.08);
  overflow: hidden;
}

.solution-card {
  min-height: 300px;
  padding: 24px;
}

.solution-card::before,
.scene-list article::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--cyan), var(--mint), var(--amber));
}

.solution-card span {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  margin-bottom: 44px;
  border: 1px solid rgba(47, 140, 255, 0.18);
  border-radius: 8px;
  color: var(--blue);
  background: rgba(47, 140, 255, 0.08);
  font-weight: 900;
}

.feature-band {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 42px;
  align-items: center;
  background:
    linear-gradient(90deg, rgba(47, 140, 255, 0.08), rgba(82, 215, 160, 0.08)),
    #f5fbff;
}

.metric-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.metric {
  min-height: 168px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-solid);
  box-shadow: 0 18px 50px rgba(37, 102, 143, 0.08);
}

.metric strong {
  display: block;
  margin-bottom: 36px;
  font-size: clamp(34px, 5vw, 56px);
  color: var(--cyan);
}

.scene-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.scene-list article {
  padding: 28px;
}

.contact {
  justify-content: space-between;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 12% 20%, rgba(82, 215, 160, 0.16), transparent 28%),
    rgba(255, 255, 255, 0.7);
}

.contact h2 {
  max-width: 760px;
  margin-bottom: 0;
}

.contact-actions {
  gap: 12px;
  flex-wrap: wrap;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px max(24px, calc((100vw - 1180px) / 2));
  color: var(--muted);
  font-size: 14px;
  background: #ffffff;
}

.footer a {
  color: var(--blue);
  font-weight: 800;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

@media (max-width: 980px) {
  .topbar {
    inset: 12px 14px auto;
  }

  .nav-links,
  .domain {
    display: none;
  }

  .hero {
    min-height: 92vh;
    padding-top: 126px;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(248, 253, 255, 0.98), rgba(248, 253, 255, 0.72)),
      linear-gradient(0deg, var(--bg) 0%, rgba(245, 251, 255, 0) 34%);
  }

  .hero-panel,
  .solution-grid,
  .feature-band,
  .metric-board,
  .scene-list {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    position: relative;
    right: auto;
    bottom: auto;
    margin-top: 44px;
  }

  .hero-panel div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .hero-panel div:last-child {
    border-bottom: 0;
  }

  .solution-card {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

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

  .btn {
    width: 100%;
  }

  .hero-copy {
    font-size: 17px;
  }
}