:root {
  --bg-page: #f6f4ef;
  --bg-card: #fdfcf8;
  --text-primary: #1f241f;
  --text-secondary: #4a524a;
  --text-muted: #6b746b;
  --accent: #204f3f;
  --accent-hover: #163b2f;
  --border-soft: #d9ddd3;
  --focus-ring: #2f7a60;
  --shadow-soft: 0 8px 30px rgba(20, 30, 20, 0.08);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 72px;
  --space-9: 96px;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --container-max: 1200px;
  --container-pad: 24px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

body[data-lang="zh"] {
  font-family: "Noto Sans SC", "IBM Plex Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.page-bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(46, 122, 96, 0.12), transparent 35%),
    radial-gradient(circle at 85% 10%, rgba(64, 90, 70, 0.1), transparent 40%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(246, 244, 239, 0));
  pointer-events: none;
  z-index: -1;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-color: rgba(32, 79, 63, 0.35);
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-color: var(--accent);
}

.container {
  width: min(var(--container-max), calc(100% - (var(--container-pad) * 2)));
  margin: 0 auto;
}

.narrow {
  max-width: 760px;
}

.section {
  padding: var(--space-9) 0;
  position: relative;
}

h1,
h2,
h3 {
  font-family: "Syne", "Noto Sans SC", sans-serif;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-4);
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  max-width: 16ch;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.45rem);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--text-secondary);
}

.eyebrow {
  margin-bottom: var(--space-3);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border-radius: 999px;
  height: 44px;
  padding: 0 var(--space-5);
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.btn:focus-visible,
.lang-btn:focus-visible,
.menu-toggle:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--accent);
  color: #f6f4ef;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-soft);
}

.btn-secondary:hover {
  border-color: #b6beb0;
  transform: translateY(-1px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(0px);
  transition: backdrop-filter 180ms ease, background-color 180ms ease, border-color 180ms ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  backdrop-filter: blur(8px);
  background: rgba(246, 244, 239, 0.82);
  border-color: rgba(100, 110, 100, 0.15);
}

.header-inner {
  height: 84px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(32, 79, 63, 0.24);
  flex: 0 0 auto;
}

.brand-name {
  display: block;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.brand-tag {
  display: block;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.main-nav {
  display: inline-flex;
  justify-self: center;
  gap: var(--space-5);
}

.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
}

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

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  padding: var(--space-1);
  background: rgba(255, 255, 255, 0.65);
}

.lang-btn {
  border: 0;
  background: transparent;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
}

.lang-btn.active {
  background: #ffffff;
  color: var(--text-primary);
  box-shadow: 0 2px 8px rgba(25, 35, 25, 0.12);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border-soft);
  background: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  padding: 0;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  margin: 0 auto;
}

.menu-toggle span + span {
  margin-top: 6px;
}

.hero {
  padding-top: calc(var(--space-9) + var(--space-5));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-8);
  align-items: center;
}

.hero-subtitle {
  font-size: clamp(1.08rem, 1.9vw, 1.35rem);
  max-width: 50ch;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(32, 79, 63, 0.28);
  border-radius: 999px;
  padding: 8px 14px;
  color: #224838;
  background: rgba(255, 255, 255, 0.66);
  font-size: 0.92rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.hero-visual {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.hero-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-soft);
}

.hero-card-main {
  width: min(420px, 100%);
  padding: var(--space-6);
  position: relative;
  z-index: 2;
}

.hero-card-main h2 {
  margin-bottom: var(--space-2);
  font-size: 1.45rem;
}

.hero-card-main p {
  margin-bottom: var(--space-4);
}

.hero-card-main ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text-secondary);
}

.hero-card-main li + li {
  margin-top: var(--space-2);
}

.hero-card-float {
  position: absolute;
  right: 18px;
  bottom: 44px;
  z-index: 3;
  padding: 10px 14px;
  font-size: 0.86rem;
  font-weight: 600;
  color: #1e4f3f;
}

.hero-orb {
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(78, 134, 108, 0.22), rgba(78, 134, 108, 0));
  top: 26px;
  right: -42px;
  z-index: 1;
}

.story p {
  font-size: 1.08rem;
}

.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: 0 2px 8px rgba(20, 30, 20, 0.04);
  transition: transform 170ms ease, box-shadow 170ms ease;
}

.highlight-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(20, 30, 20, 0.08);
}

.highlight-card-wide {
  grid-column: span 2;
}

.highlight-card h3 {
  margin-bottom: var(--space-3);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.trust-item {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  background: rgba(255, 255, 255, 0.7);
}

.trust-item h3 {
  margin-bottom: var(--space-3);
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.policy-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  background: rgba(255, 255, 255, 0.72);
}

.policy-pill {
  background: #e7efe6;
  color: #1d4737;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.83rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.waitlist-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: var(--space-7);
  align-items: start;
}

.waitlist-form {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-soft);
}

.waitlist-form label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
  font-weight: 500;
}

.waitlist-form input,
.waitlist-form select,
.waitlist-form textarea {
  width: 100%;
  border: 1px solid #c8d0c3;
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text-primary);
  font: inherit;
  padding: 12px 14px;
  margin-bottom: var(--space-4);
}

.waitlist-form textarea {
  resize: vertical;
  min-height: 110px;
}

.waitlist-form select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, #476454 50%),
    linear-gradient(135deg, #476454 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 3px),
    calc(100% - 12px) calc(50% - 3px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.consent-text {
  margin-top: var(--space-3);
  font-size: 0.87rem;
  color: var(--text-muted);
}

.form-status {
  margin-top: var(--space-3);
  min-height: 1.2em;
  font-size: 0.9rem;
}

.form-status.success {
  color: #1a5f47;
}

.form-status.error {
  color: #7c2a2a;
}

.final-cta {
  text-align: center;
}

.final-cta .btn {
  margin-top: var(--space-3);
}

.site-footer {
  border-top: 1px solid rgba(100, 110, 100, 0.2);
  padding: var(--space-7) 0 var(--space-6);
}

.footer-grid {
  display: grid;
  gap: var(--space-3);
}

.footer-brand {
  color: var(--text-primary);
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.copyright {
  color: var(--text-muted);
  margin-bottom: 0;
  font-size: 0.88rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-reveal].visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .header-inner {
    grid-template-columns: auto auto 1fr auto;
    gap: var(--space-3);
  }

  .menu-toggle {
    display: inline-block;
    justify-self: start;
  }

  .main-nav {
    display: none;
  }

  .site-header.menu-open .main-nav {
    display: flex;
    position: absolute;
    left: var(--container-pad);
    right: var(--container-pad);
    top: 76px;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .hero-visual {
    min-height: 320px;
  }

  .hero-orb {
    right: 8%;
    top: 12px;
  }

  .highlight-grid,
  .trust-grid,
  .waitlist-grid {
    grid-template-columns: 1fr 1fr;
  }

  .highlight-card-wide {
    grid-column: span 2;
  }
}

@media (max-width: 760px) {
  :root {
    --container-pad: 18px;
  }

  .section {
    padding: var(--space-8) 0;
  }

  .header-inner {
    height: 74px;
    grid-template-columns: auto 1fr auto;
  }

  .menu-toggle {
    order: 3;
  }

  .header-actions .btn {
    display: none;
  }

  .hero {
    padding-top: calc(var(--space-8) + var(--space-3));
  }

  .hero-card-main {
    padding: var(--space-5);
  }

  .hero-card-float {
    position: static;
    margin-top: var(--space-3);
    display: inline-flex;
  }

  .highlight-grid,
  .highlight-card-wide,
  .trust-grid,
  .waitlist-grid {
    grid-template-columns: 1fr;
  }

  .waitlist-form {
    padding: var(--space-5);
  }

  .policy-row {
    gap: var(--space-3);
  }

  .footer-links {
    gap: var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}