:root {
  --bg: #f4f7f6;
  --surface: #ffffff;
  --text: #10241d;
  --muted: #5f6f68;
  --line: #d6e0dc;
  --accent: #1d8f71;
  --accent-dark: #12644e;
  --radius-lg: 24px;
  --radius-md: 16px;
  --container: 1180px;
  --shadow: 0 24px 56px -28px rgba(12, 39, 31, 0.26);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100dvh;
  font-family: "Outfit", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 12% 12%, #edf7f3 0%, var(--bg) 45%, #eff4f2 100%);
  line-height: 1.65;
}

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

.container {
  width: min(var(--container), calc(100% - 2.4rem));
  margin: 0 auto;
}

.section {
  padding: 4.2rem 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(244, 247, 246, 0.82);
  border-bottom: 1px solid rgba(22, 47, 38, 0.07);
}

.nav-wrap {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.2rem;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(145deg, #1d8f71, #46b095);
  box-shadow: 0 0 0 6px rgba(29, 143, 113, 0.12);
}

.site-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 1.15rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a {
  transition: color 0.25s ease;
}

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

.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text);
  background: var(--surface);
  font-size: 0.88rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.lang-switch:hover {
  transform: translateY(-1px);
  border-color: #b9cbc4;
}

.hero {
  padding-top: 5.6rem;
  padding-bottom: 3.4rem;
}

.eyebrow {
  color: var(--accent-dark);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.76rem;
  font-weight: 600;
}

.headline {
  margin: 0.55rem 0 1rem;
  max-width: 13.5ch;
  font-size: clamp(2.2rem, 6.8vw, 4.7rem);
  line-height: 1.03;
  letter-spacing: -0.04em;
}

.hero-copy {
  max-width: 66ch;
  color: var(--muted);
  margin: 0;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  gap: 0.9rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, opacity 0.2s ease, background 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #f7fffb;
  border: 1px solid rgba(0, 0, 0, 0.02);
}

.btn-primary:hover {
  background: #17775e;
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: #fbfdfc;
}

.btn-ghost:hover {
  transform: translateY(-1px);
}

.hero-metrics {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.hero-metrics li {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem;
  background: rgba(255, 255, 255, 0.66);
  backdrop-filter: blur(3px);
}

.hero-metrics span {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-metrics small {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.2rem;
  align-items: end;
}

.split h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  letter-spacing: -0.03em;
}

.split p {
  margin: 0;
  color: var(--muted);
}

.grid-features {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1rem;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.2rem 1.2rem 1.4rem;
  box-shadow: var(--shadow);
}

.feature h3 {
  margin: 0 0 0.45rem;
  font-size: 1.1rem;
}

.feature p {
  margin: 0;
  color: var(--muted);
  text-wrap: pretty;
}

.cta {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.cta h2 {
  margin-top: 0;
  margin-bottom: 0.55rem;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  letter-spacing: -0.03em;
}

.cta p {
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: var(--muted);
}

.site-footer {
  padding: 2rem 0 2.6rem;
}

.footer-wrap {
  border-top: 1px solid rgba(16, 36, 29, 0.14);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.bg-orb {
  position: fixed;
  z-index: -1;
  pointer-events: none;
  border-radius: 999px;
  filter: blur(48px);
  opacity: 0.2;
}

.bg-orb-a {
  width: 360px;
  height: 360px;
  left: -100px;
  top: 120px;
  background: #2fb892;
}

.bg-orb-b {
  width: 290px;
  height: 290px;
  right: -80px;
  top: 310px;
  background: #7aa3c8;
}

.placeholder-main {
  min-height: calc(100dvh - 76px - 88px);
  display: grid;
  align-items: center;
}

.placeholder-card {
  width: min(700px, 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.placeholder-card h1 {
  margin-top: 0;
  margin-bottom: 0.45rem;
  letter-spacing: -0.03em;
}

.placeholder-card p {
  margin-top: 0;
  color: var(--muted);
  text-wrap: pretty;
}

.placeholder-card a {
  color: var(--accent-dark);
  font-weight: 600;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 1024px) {
  .split {
    grid-template-columns: 1fr;
  }

  .grid-features {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-wrap {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand lang"
      "nav nav";
    padding: 0.6rem 0 0.85rem;
    min-height: auto;
  }

  .brand {
    grid-area: brand;
  }

  .lang-switch {
    grid-area: lang;
    justify-self: end;
  }

  .site-nav {
    grid-area: nav;
    width: 100%;
    justify-content: flex-start;
    gap: 0.55rem;
    overflow-x: auto;
    white-space: nowrap;
    padding: 0.18rem 0.06rem 0.08rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .site-nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 3rem;
    padding: 0.24rem 0.48rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.46);
  }

  .section {
    padding: 3.1rem 0;
  }

  .hero {
    padding-top: 4.2rem;
  }

  .headline {
    max-width: 10.8ch;
    font-size: clamp(2rem, 10vw, 3.1rem);
  }

  .hero-copy {
    font-size: 1.06rem;
  }

  .hero-actions {
    flex-wrap: wrap;
    gap: 0.65rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .grid-features {
    grid-template-columns: 1fr;
  }

  .footer-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}