:root {
  --ink: #173f35;
  --muted: #71827a;
  --soft: #f8f5ed;
  --paper: rgba(255, 255, 250, 0.82);
  --line: rgba(23, 63, 53, 0.12);
  --green: #4c8c68;
  --deep: #0d6b57;
  --pink: #f3dce0;
  --violet: #e9e1f7;
  --yellow: #fff1bd;
  --blue: #dfeef7;
  --shadow: 0 24px 80px rgba(61, 83, 63, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 15% 8%, rgba(232, 247, 213, 0.9), transparent 34%),
    radial-gradient(circle at 88% 22%, rgba(250, 224, 231, 0.7), transparent 28%),
    linear-gradient(180deg, #fffdf8 0%, #f5faef 52%, #fff8ef 100%);
  min-height: 100vh;
}

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: 20px min(6vw, 72px);
  backdrop-filter: blur(18px);
  background: rgba(255, 253, 248, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.8);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.04em;
}

.brand-mark {
  display: block;
  width: 36px;
  height: 36px;
  border-radius: 14px;
  overflow: hidden;
  background: #dff7d4 url("./brand-mark.jpg") center / cover no-repeat;
  box-shadow: 0 10px 24px rgba(21, 110, 82, 0.28);
}

.nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  align-items: center;
  gap: 48px;
  padding: 92px min(6vw, 72px) 70px;
}

.eyebrow {
  margin: 0 0 14px;
  color: #73a089;
  font-weight: 800;
  letter-spacing: 0.16em;
  font-size: 12px;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(44px, 7vw, 82px);
  line-height: 1.05;
  letter-spacing: -0.06em;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 12px;
  font-size: 23px;
}

.hero-text,
.section p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
}

.hero-text {
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, #65a978, #0f705e);
  box-shadow: 0 18px 42px rgba(15, 112, 94, 0.24);
}

.button.ghost {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-card {
  position: relative;
  width: min(420px, 86vw);
  min-height: 560px;
  padding: 38px;
  border-radius: 56px;
  background:
    radial-gradient(circle at 22% 18%, rgba(229, 255, 221, 0.9), transparent 30%),
    radial-gradient(circle at 80% 12%, rgba(255, 232, 238, 0.9), transparent 32%),
    linear-gradient(180deg, rgba(255, 255, 251, 0.92), rgba(241, 248, 234, 0.78));
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.94);
  overflow: hidden;
}

.sprout-scene {
  position: relative;
  height: 340px;
  border-radius: 42px;
  background: rgba(255, 255, 255, 0.55);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.8);
}

.sun-dot {
  position: absolute;
  right: 54px;
  top: 44px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffe9a6;
  box-shadow: 0 0 36px #ffe9a6;
}

.stem {
  position: absolute;
  left: 50%;
  top: 142px;
  width: 12px;
  height: 112px;
  border-radius: 999px;
  transform: translateX(-50%);
  background: linear-gradient(#7bc963, #35875f);
  transform-origin: bottom;
  animation: breathe 3.2s ease-in-out infinite;
}

.leaf {
  position: absolute;
  left: 50%;
  top: 110px;
  width: 82px;
  height: 54px;
  background: linear-gradient(135deg, #a7e772, #4ea66f);
  border-radius: 90% 10% 80% 20%;
  box-shadow: 0 12px 28px rgba(67, 138, 76, 0.24);
  animation: leafWave 3.2s ease-in-out infinite;
}

.leaf-a {
  transform: translateX(-74px) rotate(-26deg);
}

.leaf-b {
  transform: translateX(-6px) scaleX(-1) rotate(-26deg);
  animation-delay: 0.24s;
}

.root {
  position: absolute;
  left: 50%;
  top: 245px;
  width: 160px;
  height: 1px;
  background: rgba(92, 128, 91, 0.42);
  transform-origin: left;
}

.root-a { transform: rotate(20deg); }
.root-b { transform: rotate(44deg); width: 130px; }
.root-c { transform: rotate(158deg); width: 150px; }

.mini-card {
  position: absolute;
  left: 38px;
  right: 38px;
  bottom: 42px;
  padding: 22px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 16px 44px rgba(76, 100, 80, 0.14);
}

.mini-card strong,
.mini-card span {
  display: block;
}

.mini-card span {
  margin-top: 8px;
  color: var(--muted);
}

.section {
  margin: 0 min(6vw, 72px) 30px;
  padding: 72px;
  border-radius: 44px;
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.88);
  box-shadow: 0 20px 70px rgba(70, 83, 62, 0.08);
}

.story p {
  max-width: 960px;
  font-size: 22px;
}

.section-title {
  max-width: 720px;
}

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

.feature-card {
  min-height: 280px;
  padding: 28px;
  border-radius: 34px;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.feature-card p {
  font-size: 15px;
  line-height: 1.8;
}

.feature-card.green { background: linear-gradient(180deg, #effbea, #fff); }
.feature-card.violet { background: linear-gradient(180deg, var(--violet), #fff); }
.feature-card.yellow { background: linear-gradient(180deg, var(--yellow), #fff); }
.feature-card.blue { background: linear-gradient(180deg, var(--blue), #fff); }

.icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 28px;
  border-radius: 18px;
  color: var(--deep);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 12px 28px rgba(56, 94, 73, 0.12);
}

.split {
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 36px;
  align-items: center;
}

.growth-panel {
  display: grid;
  gap: 16px;
}

.badge {
  padding: 22px 26px;
  border-radius: 999px;
  color: var(--deep);
  font-weight: 800;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 34px rgba(54, 80, 61, 0.1);
}

.safety-list {
  display: grid;
  gap: 14px;
}

.safety-list div {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.safety-list span {
  color: var(--muted);
}

.roadmap ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.roadmap li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--muted);
}

.roadmap li span {
  color: var(--deep);
  font-weight: 900;
}

.cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(223, 245, 219, 0.9), rgba(255, 239, 225, 0.88));
}

.cta p {
  max-width: 680px;
  margin: 0 auto;
}

.site-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
  padding: 42px min(6vw, 72px) 58px;
  color: var(--muted);
}

.site-footer strong {
  color: var(--ink);
  font-size: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: flex-end;
}

@keyframes breathe {
  0%, 100% { transform: translateX(-50%) scaleY(1); }
  50% { transform: translateX(-50%) scaleY(1.05); }
}

@keyframes leafWave {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.08); }
}

@media (max-width: 960px) {
  .hero,
  .split {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section {
    padding: 44px 28px;
    border-radius: 32px;
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    padding: 16px 20px;
  }

  .nav {
    display: none;
  }

  .hero {
    padding: 64px 20px 42px;
  }

  .section {
    margin: 0 16px 18px;
  }

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

  .safety-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer {
    display: block;
    padding: 32px 20px 44px;
  }

  .footer-links {
    justify-content: flex-start;
    margin-top: 18px;
  }
}