:root {
  --bg: #fafafa;
  --bg-2: #f4f4f5;
  --ink: #09090b;
  --ink-2: #18181b;
  --muted: #71717a;
  --green: #059669;
  --green-2: #047857;
  --violet: #7c3aed;
  --violet-2: #6d28d9;
  --line: rgba(9, 9, 11, 0.08);
  --white: #ffffff;
  --shadow: 0 24px 64px rgba(9, 9, 11, 0.12);
  --soft: 0 10px 32px rgba(9, 9, 11, 0.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-shell { min-height: 100vh; }

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(250, 250, 250, 0.75);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, background 0.2s;
}

.topbar.scrolled {
  border-bottom-color: var(--line);
  background: rgba(250, 250, 250, 0.92);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.06em;
}

.logo img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

.logo small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.menu {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
}

.menu a:hover { color: var(--green); }

.menu-cta {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 20px;
  color: var(--white);
  font-weight: 800;
  background: var(--ink);
  border-radius: 8px;
  transition: background 0.2s;
}

.menu-cta:hover { background: var(--green); color: var(--white); }

.hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 92vh;
  padding-top: 72px;
}

.hero-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(48px, 8vw, 96px) clamp(24px, 5vw, 72px);
  background:
    linear-gradient(135deg, rgba(5, 150, 105, 0.06), transparent 50%),
    var(--bg);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  color: var(--green);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--violet));
}

.hero-left h1 {
  margin: 0 0 20px;
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.04em;
  font-weight: 900;
}

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

.intro {
  max-width: 480px;
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 17px;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  font-weight: 800;
  font-size: 14px;
  border-radius: 8px;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--green), var(--green-2));
  box-shadow: 0 12px 28px rgba(5, 150, 105, 0.25);
}

.btn-ghost {
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 36px;
}

.tag-row span {
  padding: 6px 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.hero-right {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(32px, 5vw, 64px);
  background:
    radial-gradient(circle at 30% 20%, rgba(124, 58, 237, 0.15), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(5, 150, 105, 0.12), transparent 40%),
    var(--ink);
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0 100%);
}

.hero-right img {
  width: min(100%, 560px);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line);
  background: var(--white);
}

.metric-strip div {
  padding: 28px 24px;
  border-right: 1px solid var(--line);
  text-align: center;
}

.metric-strip div:last-child { border-right: 0; }

.metric-strip strong {
  display: block;
  margin-bottom: 4px;
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--green), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.metric-strip span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.block {
  padding: clamp(64px, 9vw, 108px) clamp(20px, 5vw, 72px);
}

.block-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.block-head .label {
  display: block;
  margin-bottom: 10px;
  color: var(--violet);
  font-family: ui-monospace, Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.block-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.block-head p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

.cap-item {
  padding: clamp(28px, 4vw, 40px);
  background: var(--white);
}

.cap-item.featured {
  grid-column: span 2;
  color: var(--white);
  background:
    radial-gradient(circle at 90% 10%, rgba(124, 58, 237, 0.3), transparent 40%),
    linear-gradient(145deg, var(--ink-2), #27272a);
}

.cap-item.featured p { color: rgba(255, 255, 255, 0.72); }

.cap-num {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--green);
  font-family: ui-monospace, Consolas, monospace;
  font-size: 13px;
  font-weight: 800;
}

.cap-item.featured .cap-num { color: #a7f3d0; }

.cap-item h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

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

.cap-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.cap-chips span {
  padding: 5px 10px;
  font-size: 11px;
  font-weight: 800;
  border-radius: 5px;
  background: rgba(5, 150, 105, 0.08);
  color: var(--green-2);
}

.cap-item.featured .cap-chips span {
  background: rgba(255, 255, 255, 0.1);
  color: #ddd6fe;
}

.scene-wrap {
  background: var(--ink);
  color: var(--white);
}

.scene-wrap .block-head .label { color: #a7f3d0; }
.scene-wrap .block-head h2 { color: var(--white); }
.scene-wrap .block-head p { color: rgba(255, 255, 255, 0.62); }

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

.scene-card {
  padding: 28px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
}

.scene-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: #a7f3d0;
}

.scene-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
}

.about-main {
  padding: clamp(32px, 4vw, 48px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--soft);
}

.about-main h2 {
  margin: 0 0 16px;
  font-size: clamp(24px, 3vw, 32px);
}

.about-main p {
  margin: 0 0 12px;
  color: var(--muted);
}

.detail-list {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.detail-list div {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.detail-list dt {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.detail-list dd {
  margin: 0;
  color: var(--ink-2);
}

.about-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.side-card {
  flex: 1;
  padding: 28px;
  border-radius: 20px;
  border: 1px solid var(--line);
}

.side-card.green {
  color: var(--white);
  background: linear-gradient(160deg, var(--green-2), var(--green));
  border-color: transparent;
}

.side-card.green p { color: rgba(255, 255, 255, 0.82); margin: 0 0 16px; }

.side-card.plain {
  background: var(--bg-2);
}

.side-card.plain h3 { margin: 0 0 12px; font-size: 17px; }

.link-grid {
  display: grid;
  gap: 8px;
}

.link-grid a {
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: border-color 0.2s;
}

.link-grid a:hover { border-color: var(--green); color: var(--green); }

.side-card.green .link-grid a {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--white);
}

.side-card.green .link-grid a:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

.bottom-cta {
  margin: 0 clamp(20px, 5vw, 72px) clamp(64px, 9vw, 108px);
  padding: clamp(40px, 5vw, 56px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--soft);
}

.bottom-cta h2 {
  margin: 0 0 6px;
  font-size: clamp(22px, 3vw, 30px);
}

.bottom-cta p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.site-footer {
  padding: 48px clamp(20px, 5vw, 72px) 32px;
  color: rgba(255, 255, 255, 0.72);
  background: var(--ink);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.footer-logo strong { display: block; color: var(--white); font-size: 16px; }
.footer-logo span { font-size: 13px; }

.footer-cols {
  display: flex;
  gap: 48px;
}

.footer-cols div {
  display: grid;
  gap: 8px;
}

.footer-cols strong {
  margin-bottom: 4px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-cols a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 600;
}

.footer-cols a:hover { color: #a7f3d0; }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
}

.footer-bottom a { color: rgba(255, 255, 255, 0.72); }
.footer-bottom a:hover { color: #a7f3d0; }

.doc-page .menu { display: none; }

.doc-wrap {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 100px clamp(20px, 5vw, 72px) 80px;
}

.doc-nav {
  position: sticky;
  top: 96px;
  align-self: start;
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.doc-nav a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

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

.doc-body {
  padding: clamp(28px, 4vw, 44px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--soft);
}

.doc-body h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 38px);
}

.doc-body h2 {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 20px;
}

.doc-body p, .doc-body li { color: #52525b; }

.doc-body .cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin: 24px 0;
}

.doc-body .mini-card {
  padding: 20px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.doc-body .mini-card h3 { margin: 0 0 8px; font-size: 16px; }
.doc-body .mini-card p { margin: 0; font-size: 14px; }

.muted { color: var(--muted); }

@media (max-width: 960px) {
  .menu a:not(.menu-cta) { display: none; }
  .hero-split { grid-template-columns: 1fr; min-height: auto; }
  .hero-right { clip-path: none; min-height: 360px; }
  .metric-strip { grid-template-columns: repeat(2, 1fr); }
  .metric-strip div:nth-child(2) { border-right: 0; }
  .metric-strip div { border-bottom: 1px solid var(--line); }
  .cap-grid { grid-template-columns: 1fr; }
  .cap-item.featured { grid-column: span 1; }
  .scene-cards { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .doc-wrap { grid-template-columns: 1fr; }
  .doc-nav { position: static; }
}

@media (max-width: 560px) {
  .metric-strip { grid-template-columns: 1fr; }
  .metric-strip div { border-right: 0; }
  .bottom-cta { flex-direction: column; align-items: flex-start; }
}