:root {
  color-scheme: light;
  --ink: #09111f;
  --muted: #536175;
  --line: #d9e2ee;
  --paper: #f7fafc;
  --panel: #ffffff;
  --cyan: #08c9d8;
  --blue: #0966f2;
  --green: #41b883;
  --shadow: 0 24px 70px rgba(11, 36, 72, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(8, 201, 216, 0.12), transparent 32%),
    linear-gradient(315deg, rgba(65, 184, 131, 0.14), transparent 30%),
    var(--paper);
  font-family: "Aptos", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(217, 226, 238, 0.78);
  background: rgba(247, 250, 252, 0.84);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
}

.brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 32px);
  color: var(--muted);
  font-size: 14px;
}

.nav a:hover {
  color: var(--blue);
}

.hero {
  min-height: calc(100vh - 74px);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(280px, 0.98fr);
  align-items: center;
  gap: clamp(32px, 7vw, 96px);
  padding: clamp(56px, 9vw, 112px) clamp(20px, 5vw, 72px) clamp(40px, 7vw, 80px);
  overflow: hidden;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 26px;
  font-size: clamp(46px, 8vw, 92px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.lead {
  max-width: 680px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

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

.button.primary {
  border-color: transparent;
  color: #ffffff;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
}

.button.secondary {
  background: rgba(255, 255, 255, 0.72);
}

.hero-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
}

.hero-mark img {
  width: min(100%, 560px);
  filter: drop-shadow(0 38px 70px rgba(9, 102, 242, 0.24));
}

.section {
  padding: clamp(64px, 9vw, 116px) clamp(20px, 5vw, 72px);
}

.band {
  background: rgba(255, 255, 255, 0.72);
  border-block: 1px solid rgba(217, 226, 238, 0.8);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-heading p,
.content-block p,
.contact p {
  color: var(--muted);
  font-size: 17px;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 12px 34px rgba(11, 36, 72, 0.07);
}

.card-index {
  display: block;
  margin-bottom: 34px;
  color: var(--green);
  font-weight: 800;
}

.card p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: start;
}

.content-block {
  max-width: 820px;
}

.plain-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.plain-list li,
.resource-row span {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  font-weight: 700;
}

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

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: var(--ink);
  color: #ffffff;
}

.contact p {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.72);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.button.dark {
  border-color: rgba(255, 255, 255, 0.24);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(20px, 5vw, 72px);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 860px) {
  .site-header,
  .site-footer,
  .contact {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact-actions {
    justify-content: flex-start;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero,
  .split,
  .grid.three,
  .plain-list,
  .resource-row {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-mark {
    min-height: 240px;
    justify-content: flex-start;
  }

  .hero-mark img {
    width: min(82vw, 360px);
  }
}