:root {
  color-scheme: dark;
  --bg: #071014;
  --panel: #101820;
  --panel-2: #0b141a;
  --line: #263844;
  --text: #f2f7f9;
  --muted: #a8bac2;
  --cyan: #66deff;
  --yellow: #ffd166;
  --green: #59df8b;
  --pink: #fb7299;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at 80% 10%, rgba(102, 222, 255, 0.12), transparent 28%),
    linear-gradient(180deg, #081218 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
  line-height: 1.72;
}

a {
  color: var(--cyan);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(7, 16, 20, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  gap: 20px;
}

.brand {
  font-size: 19px;
  font-weight: 800;
  color: var(--text);
}

.brand span {
  color: var(--cyan);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.links a {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text);
  font-size: 14px;
}

.links a.active,
.links a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 34px;
  align-items: center;
  padding: 58px 0 42px;
}

.eyebrow {
  color: var(--cyan);
  font-size: 18px;
  font-weight: 800;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0;
}

h1 {
  margin-top: 12px;
  font-size: clamp(30px, 4vw, 56px);
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(26px, 3vw, 34px);
}

h3 {
  margin-bottom: 10px;
  font-size: 23px;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  margin: 22px 0 0;
}

.hero-card,
.card,
.note,
.codebox {
  background: rgba(16, 24, 32, 0.86);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero-card {
  padding: 14px;
}

.hero-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.chip {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 13px;
  color: var(--text);
  font-weight: 800;
}

.chip.cyan {
  color: var(--cyan);
  border-color: var(--cyan);
}

.chip.yellow {
  color: var(--yellow);
  border-color: var(--yellow);
}

.chip.green {
  color: var(--green);
  border-color: var(--green);
}

.chip.pink {
  color: var(--pink);
  border-color: var(--pink);
}

main {
  padding-bottom: 70px;
}

.section {
  padding: 34px 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  padding: 22px;
}

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

.card ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.download-card {
  display: flex;
  min-height: 144px;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  background: rgba(16, 24, 32, 0.9);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.download-card h3 {
  font-size: 18px;
}

.download-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.download-card .button {
  width: 100%;
}

.code-panel {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: rgba(16, 24, 32, 0.86);
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}

.code-head strong {
  color: var(--yellow);
}

.copy-btn {
  flex: 0 0 auto;
  min-height: 34px;
  border: 1px solid var(--cyan);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--cyan);
  background: transparent;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.copy-btn.done {
  color: var(--green);
  border-color: var(--green);
}

.note {
  padding: 22px;
  border-color: var(--yellow);
}

.note strong {
  color: var(--yellow);
}

.codebox {
  padding: 18px;
  margin: 0;
  max-height: 420px;
  overflow-x: auto;
  overflow-y: auto;
  color: var(--text);
  font-family: Consolas, "Microsoft YaHei", monospace;
  white-space: pre-wrap;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.flow .step {
  border: 1px solid var(--line);
  background: var(--panel-2);
  border-radius: 8px;
  padding: 18px;
}

.step b {
  color: var(--cyan);
}

.footer-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 30px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--cyan);
  border-radius: 8px;
  padding: 0 16px;
  color: var(--cyan);
  font-weight: 800;
}

.button:hover {
  background: rgba(102, 222, 255, 0.12);
  text-decoration: none;
}

@media (max-width: 860px) {
  .nav,
  .hero {
    grid-template-columns: 1fr;
  }

  .nav {
    align-items: flex-start;
    padding: 14px 0;
  }

  .links {
    justify-content: flex-start;
  }

  .hero {
    display: block;
  }

  .hero-card {
    margin-top: 24px;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 26px;
  }

  .lead {
    font-size: 17px;
  }

  .grid,
  .grid.three,
  .download-grid,
  .flow {
    grid-template-columns: 1fr;
  }
}

.site-home {
  border: 1px solid rgba(102, 222, 255, 0.45);
  border-radius: 999px;
  padding: 6px 10px;
}

.site-home:hover {
  background: rgba(102, 222, 255, 0.12);
  text-decoration: none;
}