:root {
  color-scheme: light;
  --ink: #172026;
  --muted: #5f6f7a;
  --line: #d9e2e4;
  --panel: #ffffff;
  --soft: #eef5f2;
  --green: #16845b;
  --blue: #2f65d9;
  --amber: #b66b12;
  --shadow: 0 24px 70px rgba(31, 45, 50, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
  background: #f7faf8;
  letter-spacing: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(23, 32, 38, 0.08);
  background: rgba(247, 250, 248, 0.92);
  backdrop-filter: blur(18px);
}

.brand,
.nav,
.hero-actions,
.release-strip,
.download-list,
.deploy-grid {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--green);
}

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

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

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(460px, 1.1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(42px, 6vw, 82px) clamp(20px, 5vw, 72px) 44px;
  background:
    linear-gradient(110deg, rgba(22, 132, 91, 0.12), transparent 42%), linear-gradient(180deg, #f7faf8, #edf4f1);
}

.hero-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.05;
  letter-spacing: 0;
  word-break: keep-all;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
}

.hero-lead {
  max-width: 640px;
  color: #40505a;
  font-size: 19px;
  line-height: 1.78;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
}

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

.button.secondary {
  background: #fff;
}

.release-strip {
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

.release-strip div {
  min-width: 142px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.release-strip dt {
  color: var(--muted);
  font-size: 12px;
}

.release-strip dd {
  margin: 4px 0 0;
  font-weight: 800;
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  display: block;
  width: 100%;
  border: 1px solid rgba(23, 32, 38, 0.14);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.section {
  padding: clamp(58px, 8vw, 104px) clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-grid article {
  min-height: 236px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.feature-grid span {
  display: inline-block;
  margin-bottom: 32px;
  color: var(--amber);
  font-weight: 900;
}

.feature-grid p,
.timeline p,
.download-band p {
  color: var(--muted);
  line-height: 1.75;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(320px, 1.2fr);
  gap: 40px;
  background: #fff;
}

.timeline {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  padding: 22px 24px;
  border-left: 4px solid var(--green);
  background: var(--soft);
}

.download-band {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(300px, 0.9fr);
  gap: 36px;
  align-items: center;
  background: #10251e;
  color: #fff;
}

.download-band p {
  max-width: 780px;
  color: #c9d7d1;
}

.download-list {
  flex-direction: column;
  gap: 12px;
  align-items: stretch;
}

.download-list a {
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.download-list span {
  display: block;
  margin-top: 6px;
  color: #c9d7d1;
  word-break: break-word;
}

.deploy-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.deploy-grid div {
  flex: 1;
  min-width: 220px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

code {
  display: inline-block;
  max-width: 100%;
  padding: 8px 10px;
  overflow-wrap: anywhere;
  border-radius: 6px;
  color: #0f3d2e;
  background: #e8f3ee;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #fff;
}

.manual-page {
  padding: clamp(36px, 6vw, 72px) clamp(20px, 5vw, 72px);
  background: #f7faf8;
}

.manual-content {
  max-width: 960px;
  margin: 0 auto;
  padding: clamp(24px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 50px rgba(31, 45, 50, 0.08);
}

.manual-content h1 {
  margin-bottom: 16px;
  font-size: clamp(34px, 5vw, 56px);
}

.manual-content h2 {
  margin-top: 42px;
  margin-bottom: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: clamp(24px, 3vw, 34px);
}

.manual-content h3 {
  margin-top: 28px;
  color: #20313a;
}

.manual-content p,
.manual-content li {
  color: #3f5059;
  line-height: 1.8;
}

.manual-content a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.manual-content pre {
  max-width: 100%;
  padding: 16px;
  overflow-x: auto;
  border: 1px solid #dce7e4;
  border-radius: 8px;
  background: #f3f8f6;
}

.manual-content pre code {
  padding: 0;
  color: #19352d;
  background: transparent;
}

.manual-content code {
  font-family: 'Cascadia Code', Consolas, 'Courier New', monospace;
}

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

  .hero {
    min-height: auto;
  }

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

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .nav {
    width: 100%;
    gap: 12px;
    overflow-x: auto;
    white-space: nowrap;
  }

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

  .feature-grid article {
    min-height: auto;
  }

  h1 {
    font-size: 44px;
  }

  .hero-lead {
    font-size: 17px;
  }

  .footer {
    flex-direction: column;
  }
}