:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --panel: #161b22;
  --panel2: #1c2129;
  --line: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --blue: #2f81f7;
  --green: #3fb950;
  --amber: #d29922;
  --red: #f85149;
  --radius: 8px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Mono", "Consolas", "Courier New", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button, .btn { font: inherit; cursor: pointer; border: none; }

.container { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 17, 23, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-family: var(--mono);
  font-size: 0.95rem;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  background: #238636;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
}

.logo-text span { color: var(--blue); }

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.1rem;
}

.nav-links a {
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.9rem;
  transition: 0.15s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--bg2);
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.lang-switch button {
  background: transparent;
  color: var(--muted);
  padding: 0.35rem 0.6rem;
  font-size: 0.78rem;
  font-family: var(--mono);
}

.lang-switch button.active {
  background: var(--panel2);
  color: var(--text);
}

.hero { padding: 2.8rem 0 2rem; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1.6rem;
  align-items: stretch;
}

.hero-copy {
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.95rem;
}

.tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.22rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--bg);
}

.tag:nth-child(1) { color: var(--green); border-color: rgba(63, 185, 80, 0.4); }
.tag:nth-child(2) { color: var(--blue); border-color: rgba(47, 129, 247, 0.4); }

.hero h1 {
  font-size: clamp(1.85rem, 3.8vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.85rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--blue);
}

.hero-lead {
  color: var(--muted);
  font-size: 1.02rem;
  margin-bottom: 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.75rem 1.1rem;
  border-radius: 6px;
  font-weight: 650;
  font-size: 0.95rem;
  transition: 0.15s ease;
}

.btn-primary {
  color: #fff;
  background: #238636;
  border: 1px solid rgba(46, 160, 67, 0.5);
}

.btn-primary:hover { background: #2ea043; }

.btn-secondary {
  color: var(--text);
  background: var(--bg2);
  border: 1px solid var(--line);
}

.btn-secondary:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.btn-sm { padding: 0.5rem 0.85rem; font-size: 0.86rem; }

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
}

.trust-item {
  padding: 0.65rem 0.7rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}

.trust-item strong {
  display: block;
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 0.1rem;
  font-family: var(--font);
}

.dev-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.dev-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.dev-tabs span {
  padding: 0.65rem 0.9rem;
  color: var(--muted);
  border-right: 1px solid var(--line);
}

.dev-tabs span.active {
  color: var(--text);
  background: var(--panel);
  box-shadow: inset 0 -2px 0 var(--blue);
}

.dev-panel img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.dev-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
  padding: 0.7rem;
  border-top: 1px solid var(--line);
}

.dev-meta code {
  display: block;
  padding: 0.55rem 0.65rem;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--green);
}

.section { padding: 2.8rem 0; }
.section-alt {
  background: var(--bg2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head { margin-bottom: 1.35rem; max-width: 64ch; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--blue);
  margin-bottom: 0.4rem;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.8vw, 1.95rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.section-head p { color: var(--muted); }

.platform-grid,
.feature-grid,
.compat-grid,
.reco-grid,
.scene-grid,
.faq-grid,
.step-grid,
.download-grid {
  display: grid;
  gap: 0.85rem;
}

.platform-grid { grid-template-columns: repeat(5, 1fr); }
.feature-grid,
.scene-grid,
.faq-grid { grid-template-columns: repeat(3, 1fr); }
.compat-grid { grid-template-columns: repeat(4, 1fr); }
.reco-grid,
.download-grid,
.step-grid { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.05rem;
  transition: 0.15s ease;
}

.card:hover { border-color: #484f58; }

.card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.card p,
.card li { color: var(--muted); font-size: 0.92rem; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  margin-bottom: 0.55rem;
  border: 1px solid var(--line);
  background: var(--bg);
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.status-ok { color: var(--green); }
.status-warn { color: var(--amber); }

.meta-list {
  display: grid;
  gap: 0.28rem;
  margin: 0.6rem 0 0.9rem;
  font-size: 0.84rem;
  color: var(--muted);
  font-family: var(--mono);
}

.meta-list strong {
  color: var(--text);
  font-family: var(--font);
}

.how-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.flow-list { display: grid; gap: 0.65rem; }

.flow-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  padding: 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
}

.flow-num {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text);
  background: var(--panel2);
  border: 1px solid var(--line);
}

.console {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #010409;
  overflow: hidden;
}

.console-bar {
  display: flex;
  justify-content: space-between;
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg2);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.console pre {
  padding: 0.9rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.7;
  color: #7ee787;
  overflow-x: auto;
}

.console .cmt { color: #6e7681; }
.console .k { color: #79c0ff; }
.console .v { color: #ffa657; }

.how-shot {
  margin-top: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.points {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.7rem;
}

.point {
  padding: 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.88rem;
}

.point strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.2rem;
  font-family: var(--mono);
  font-size: 0.78rem;
}

.compat-item h3 { font-size: 0.95rem; }
.compat-item p { font-size: 0.86rem; }

.step-index {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--blue);
  margin-bottom: 0.35rem;
}

.tips {
  margin-top: 0.95rem;
  padding: 0.95rem 1.05rem;
  border-radius: 8px;
  border: 1px solid rgba(210, 153, 34, 0.35);
  background: rgba(210, 153, 34, 0.08);
}

.tips h3 {
  color: var(--amber);
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
  font-family: var(--mono);
}

.tips ul { display: grid; gap: 0.35rem; }
.tips li {
  color: var(--muted);
  font-size: 0.9rem;
  padding-left: 0.95rem;
  position: relative;
}

.tips li::before {
  content: "!";
  position: absolute;
  left: 0;
  color: var(--amber);
  font-family: var(--mono);
  font-weight: 700;
}

.scene-card { min-height: 140px; }

.faq-item details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 0.9rem 1rem;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 650;
  list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--muted);
  font-family: var(--mono);
}

.faq-item details[open] summary::after { content: "−"; }
.faq-item details p {
  margin-top: 0.6rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.cta { padding: 2.6rem 0; }

.cta-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 1.6rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(47, 129, 247, 0.08), transparent 45%), var(--panel);
}

.cta-box h2 {
  font-size: clamp(1.3rem, 2.8vw, 1.8rem);
  margin-bottom: 0.3rem;
}

.cta-box p { color: var(--muted); }
.cta-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.page-hero { padding: 2rem 0 0.9rem; }
.page-hero .panel {
  padding: 1.2rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.page-hero h1 {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  margin: 0.3rem 0 0.5rem;
}
.page-hero p { color: var(--muted); max-width: 62ch; }

.breadcrumb {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}
.breadcrumb a { color: var(--blue); }

.content-block { display: grid; gap: 0.85rem; }
.content-block .card ol,
.content-block .card ul {
  display: grid;
  gap: 0.4rem;
  padding-left: 1.05rem;
}
.content-block .card ol { list-style: decimal; }
.content-block .card ul { list-style: disc; }
.content-block .card li { color: var(--muted); }

.inline-img {
  margin-top: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #010409;
  padding: 2.2rem 0 1.2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.2rem;
}

.footer-col h4 {
  font-size: 0.88rem;
  margin-bottom: 0.55rem;
  font-family: var(--mono);
  color: var(--muted);
}

.footer-col p,
.footer-col a {
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-col ul { display: grid; gap: 0.35rem; }
.footer-col a:hover { color: var(--blue); }

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-family: var(--mono);
}

@media (max-width: 1024px) {
  .platform-grid { grid-template-columns: repeat(3, 1fr); }
  .compat-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid,
  .scene-grid,
  .faq-grid,
  .reco-grid,
  .download-grid,
  .step-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid,
  .how-grid { grid-template-columns: 1fr; }
  .points { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav { flex-wrap: wrap; }
  .nav-links { width: 100%; }
  .platform-grid,
  .feature-grid,
  .scene-grid,
  .faq-grid,
  .reco-grid,
  .download-grid,
  .step-grid,
  .compat-grid,
  .footer-grid,
  .trust-row { grid-template-columns: 1fr; }
}