:root {
  color-scheme: light;
  --bg: #f6f2ea;
  --bg-soft: #fffaf1;
  --text: #161616;
  --muted: #67615a;
  --line: rgba(22, 22, 22, 0.12);
  --accent: #256f5c;
  --accent-dark: #15463a;
  --accent-soft: #d7eee5;
  --card: rgba(255, 255, 255, 0.76);
  --shadow: 0 24px 80px rgba(30, 41, 59, 0.12);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(37, 111, 92, 0.16), transparent 28rem),
    radial-gradient(circle at 90% 0%, rgba(218, 151, 74, 0.18), transparent 30rem),
    var(--bg);
}

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: 1rem;
  padding: 1rem clamp(1.25rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(246, 242, 234, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
  border-radius: 0.85rem;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #0f2f29);
  box-shadow: 0 12px 30px rgba(21, 70, 58, 0.24);
}

.nav {
  display: flex;
  gap: clamp(0.8rem, 2vw, 1.6rem);
  color: var(--muted);
  font-size: 0.95rem;
}

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

.language-toggle,
.button {
  border: 1px solid var(--line);
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
}

.language-toggle {
  padding: 0.65rem 1rem;
  color: var(--accent-dark);
  background: rgba(255, 255, 255, 0.58);
  cursor: pointer;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  min-height: 78vh;
  padding: clamp(4rem, 9vw, 8rem) clamp(1.25rem, 6vw, 7rem);
}

.hero-copy {
  max-width: 48rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 13ch;
  margin-bottom: 1.4rem;
  font-size: clamp(3rem, 9vw, 6.8rem);
  line-height: 0.94;
  letter-spacing: -0.08em;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

h3 {
  margin-bottom: 0.7rem;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.hero-text,
.section-text,
.privacy-panel p,
.hero-card p,
.flow-card p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-text {
  max-width: 42rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.25rem;
}

.button.primary {
  color: #fff;
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

.button.secondary {
  color: var(--accent-dark);
  background: rgba(255, 255, 255, 0.54);
}

.hero-card,
.flow-card,
.privacy-panel {
  border: 1px solid var(--line);
  border-radius: 2rem;
  background: var(--card);
  box-shadow: var(--shadow);
}

.hero-card {
  min-height: 23rem;
  padding: 2rem;
}

.status-pill {
  display: inline-flex;
  margin-bottom: 5rem;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-weight: 800;
}

.section {
  padding: clamp(4rem, 8vw, 7rem) clamp(1.25rem, 6vw, 7rem);
}

.section-heading {
  max-width: 46rem;
  margin-bottom: 2rem;
}

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

.flow-card {
  padding: 1.5rem;
}

.flow-index {
  display: block;
  margin-bottom: 2.6rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(18rem, 1.1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.check-list {
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.58);
  color: var(--accent-dark);
  font-weight: 750;
}

.privacy-panel {
  max-width: 68rem;
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 4rem);
  text-align: center;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1.25rem, 4vw, 4rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-beian a:hover,
.footer-beian a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

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

  .hero {
    min-height: auto;
  }

  h1 {
    max-width: 10ch;
  }

  .status-pill {
    margin-bottom: 3rem;
  }

  .site-footer {
    flex-direction: column;
  }
}

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