:root {
  color-scheme: light;
  --ink: #18202a;
  --muted: #627084;
  --line: #d9e0e8;
  --paper: #fbfaf6;
  --surface: #ffffff;
  --teal: #237b75;
  --blue: #1e3f66;
  --ochre: #b77a2f;
  --shadow: 0 18px 50px rgba(24, 32, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 6vw;
  border-bottom: 1px solid rgba(217, 224, 232, 0.85);
  background: rgba(251, 250, 246, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 8px;
  color: #fff;
  background: var(--teal);
  font-size: 18px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

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

.hero {
  position: relative;
  min-height: min(640px, calc(100vh - 68px));
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #172337;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(16, 26, 40, 0.84), rgba(16, 26, 40, 0.42) 48%, rgba(16, 26, 40, 0.08)),
    linear-gradient(0deg, rgba(24, 32, 42, 0.16), rgba(24, 32, 42, 0));
}

.hero-overlay {
  position: relative;
  z-index: 1;
  width: min(680px, 88vw);
  margin-left: 6vw;
  padding: 92px 0 112px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #83d1c9;
}

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

h1 {
  max-width: 9em;
  margin-bottom: 18px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 620px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
}

.notice {
  width: min(1120px, 88vw);
  margin: -40px auto 0;
  position: relative;
  z-index: 2;
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-left: 6px solid var(--ochre);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  color: #334154;
}

.section {
  width: min(1120px, 88vw);
  margin: 0 auto;
  padding: 96px 0 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.card p,
.steps p,
.timeline p,
.about p {
  color: var(--muted);
}

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

.card {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.card-kicker {
  display: inline-block;
  margin-bottom: 22px;
  color: var(--ochre);
  font-size: 13px;
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(320px, 1fr);
  gap: 72px;
  align-items: start;
}

.steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.steps span {
  color: var(--teal);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.15;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.timeline article {
  padding: 24px;
  border-top: 4px solid var(--blue);
  border-radius: 0 0 8px 8px;
  background: var(--surface);
  box-shadow: 0 10px 30px rgba(24, 32, 42, 0.08);
}

.timeline time {
  display: block;
  margin-bottom: 14px;
  color: var(--teal);
  font-weight: 700;
}

.about {
  padding-bottom: 96px;
}

.about p {
  max-width: 860px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 6vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #f5f2eb;
  font-size: 14px;
}

.site-footer a:hover {
  color: var(--teal);
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .nav {
    width: 100%;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 560px;
  }

  .hero::after {
    background: linear-gradient(90deg, rgba(16, 26, 40, 0.86), rgba(16, 26, 40, 0.34));
  }

  .card-grid,
  .timeline,
  .split {
    grid-template-columns: 1fr;
  }

  .split {
    gap: 28px;
  }
}

@media (max-width: 560px) {
  .site-header,
  .site-footer {
    padding-left: 20px;
    padding-right: 20px;
  }

  .brand {
    font-size: 15px;
  }

  .hero {
    min-height: 520px;
  }

  .hero-overlay {
    width: calc(100vw - 40px);
    margin-left: 20px;
    padding-top: 68px;
  }

  h1 {
    font-size: 42px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .notice,
  .section {
    width: calc(100vw - 40px);
  }

  .section {
    padding-top: 72px;
  }

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

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}