:root {
  --primary: #123f3c;
  --surface: #fbfbf6;
  --accent: #6d8f2e;
  --support: #b66a2c;
  --ink: #17211f;
  --muted: #5f6671;
  --line: rgba(17, 24, 39, .18);
  --muted: color-mix(in srgb, var(--ink) 68%, var(--surface));
  --line: color-mix(in srgb, var(--ink) 18%, transparent);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  line-height: 1.68;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
.site-shell { min-height: 100vh; overflow: clip; }
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 90%, white);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-weight: 800;
}
.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--surface);
  background: var(--primary);
  border: 2px solid var(--accent);
  border-radius: 8px;
  flex: 0 0 auto;
}
.brand span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-links { display: flex; gap: 20px; align-items: center; font-size: 14px; color: var(--muted); }
.nav-cta, .btn, .outline-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
  white-space: nowrap;
}
.nav-cta, .btn {
  color: var(--surface);
  background: var(--accent);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 34%, transparent);
}
.outline-btn { border: 1px solid var(--line); color: var(--ink); background: var(--surface); background: color-mix(in srgb, var(--surface) 72%, white); }
.hero {
  position: relative;
  min-height: min(760px, calc(100vh - 44px));
  display: grid;
  align-items: end;
  color: white;
  background: var(--ink);
}
.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, color-mix(in srgb, var(--ink) 76%, transparent), color-mix(in srgb, var(--primary) 28%, transparent), color-mix(in srgb, var(--ink) 30%, transparent));
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 92px 0 80px;
}
.eyebrow {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  margin: 0 0 16px;
  color: color-mix(in srgb, white 86%, var(--accent));
  font-size: 14px;
  font-weight: 800;
}
h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(42px, 6.2vw, 88px);
  line-height: 0.98;
  letter-spacing: 0;
}
.hero-copy {
  max-width: 720px;
  margin: 22px 0 0;
  color: color-mix(in srgb, white 86%, var(--surface));
  font-size: clamp(16px, 1.8vw, 20px);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero .outline-btn { color: white; background: color-mix(in srgb, white 12%, transparent); border-color: color-mix(in srgb, white 34%, transparent); }
.quick-facts {
  width: min(1180px, calc(100% - 36px));
  margin: -42px auto 0;
  position: relative;
  z-index: 4;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.fact {
  min-height: 104px;
  padding: 18px;
  border-radius: 8px;
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 92%, white);
  border: 1px solid var(--line);
  box-shadow: 0 16px 44px rgba(0,0,0,.08);
}
.fact strong { display: block; font-size: 20px; line-height: 1.2; }
.fact span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
section { padding: clamp(54px, 8vw, 104px) clamp(18px, 4vw, 56px); scroll-margin-top: 78px; }
.section-inner { width: min(1180px, 100%); margin: 0 auto; }
.section-kicker { margin: 0 0 10px; color: var(--accent); font-size: 14px; font-weight: 800; }
.section-title { margin: 0; max-width: 760px; font-size: clamp(28px, 3.4vw, 46px); line-height: 1.12; letter-spacing: 0; }
.section-copy { max-width: 760px; color: var(--muted); margin: 14px 0 0; font-size: 16px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 34px; }
.feature-card {
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 92%, white);
  overflow: hidden;
}
.feature-card img { width: 100%; aspect-ratio: 1.35; object-fit: cover; }
.feature-card div { padding: 20px; }
.feature-card h3 { margin: 0; font-size: 19px; line-height: 1.25; }
.feature-card p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.split { display: grid; grid-template-columns: minmax(0, 1.03fr) minmax(320px, .97fr); gap: clamp(24px, 5vw, 74px); align-items: center; }
.split-media { display: grid; gap: 14px; }
.split-media img { border-radius: 8px; aspect-ratio: 1.45; object-fit: cover; border: 1px solid var(--line); }
.split-media .small-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.bullet-list { display: grid; gap: 14px; margin: 28px 0 0; padding: 0; list-style: none; }
.bullet-list li { display: grid; grid-template-columns: 28px 1fr; gap: 12px; align-items: start; color: var(--muted); }
.bullet-list b { color: var(--ink); }
.dot {
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: inset 0 0 0 6px color-mix(in srgb, var(--surface) 60%, white);
}
.overview-band {
  background: var(--surface);
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, white), color-mix(in srgb, var(--surface) 88%, var(--primary)));
}
.overview-layout {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(320px, 1.05fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: center;
}
.overview-copy {
  display: grid;
  gap: 18px;
  color: var(--muted);
  margin-top: 22px;
}
.overview-copy p { margin: 0; }
.statline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}
.statline div {
  min-height: 92px;
  padding: 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 94%, white);
}
.statline strong { display: block; font-size: 24px; line-height: 1.1; color: var(--primary); }
.statline span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.visual-stack {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 14px;
  align-items: stretch;
}
.visual-stack img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.visual-stack img:first-child { grid-row: span 2; }
.module-band { background: var(--surface); }
.module-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}
.module-card {
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 94%, white);
}
.module-card img {
  width: 100%;
  aspect-ratio: 1.42;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 16px;
}
.module-card h3 { margin: 0; font-size: 18px; line-height: 1.28; }
.module-card p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }
.compat-band {
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 88%, white);
}
.compat-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 430px);
  gap: clamp(22px, 4vw, 58px);
  align-items: start;
  margin-top: 34px;
}
.compat-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 96%, white);
}
.compat-table th,
.compat-table td {
  padding: 15px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.compat-table tr:last-child th,
.compat-table tr:last-child td { border-bottom: 0; }
.compat-table th { width: 34%; color: var(--primary); font-size: 15px; }
.compat-card {
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 94%, white);
  overflow: hidden;
}
.compat-card img { width: 100%; aspect-ratio: 1.35; object-fit: cover; }
.compat-card div { padding: 20px; }
.compat-card h3 { margin: 0; font-size: 20px; }
.compat-card p { margin: 10px 0 0; color: var(--muted); }
.process-band { background: var(--surface); background: color-mix(in srgb, var(--primary) 9%, var(--surface)); }
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 32px;
  counter-reset: steps;
}
.step-card {
  position: relative;
  min-height: 178px;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 95%, white);
}
.step-card::before {
  counter-increment: steps;
  content: counter(steps, decimal-leading-zero);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 20px;
  border-radius: 8px;
  color: var(--surface);
  background: var(--primary);
  font-weight: 900;
}
.step-card h3 { margin: 0; font-size: 18px; }
.step-card p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }
.visual-wall {
  display: grid;
  grid-template-columns: 1.2fr .8fr 1fr .9fr;
  grid-auto-rows: minmax(180px, 1fr);
  gap: 14px;
  margin-top: 34px;
}
.visual-wall img {
  width: 100%;
  height: 100%;
  min-height: 190px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.visual-wall img:first-child { grid-row: span 2; }
.visual-wall img:nth-child(4) { grid-column: span 2; }
.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}
.faq-item {
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  background: color-mix(in srgb, var(--surface) 94%, white);
}
.faq-item h3 { margin: 0; font-size: 18px; line-height: 1.35; }
.faq-item p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.download-band {
  background: var(--primary);
  background: color-mix(in srgb, var(--primary) 88%, var(--ink));
  color: var(--surface);
}
.download-panel {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 28px;
  align-items: center;
}
.download-panel h2 { margin: 0; font-size: clamp(30px, 4vw, 52px); line-height: 1.08; letter-spacing: 0; }
.download-panel p { margin: 14px 0 0; color: color-mix(in srgb, var(--surface) 80%, white); }
.download-box {
  border-radius: 8px;
  padding: 22px;
  background: color-mix(in srgb, white 12%, transparent);
  border: 1px solid color-mix(in srgb, white 22%, transparent);
}
.download-box code {
  display: block;
  overflow-wrap: anywhere;
  margin: 12px 0 0;
  color: var(--surface);
  font-size: 13px;
}
.download-box .btn { width: 100%; background: var(--accent); color: var(--surface); }
.gallery-strip { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 14px; margin-top: 34px; }
.gallery-strip img { width: 100%; min-height: 230px; height: 100%; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); }
.seo-block { background: var(--surface); background: color-mix(in srgb, var(--surface) 82%, white); }
.seo-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin-top: 28px; }
.seo-columns article { border-left: 4px solid var(--accent); padding: 0 0 0 20px; }
.seo-columns h3 { margin: 0; font-size: 20px; }
.seo-columns p { margin: 9px 0 0; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.tags span { border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; font-size: 13px; color: var(--muted); background: var(--surface); background: color-mix(in srgb, var(--surface) 90%, white); }
.footer {
  color: color-mix(in srgb, var(--surface) 78%, white);
  background: var(--ink);
  border-top: 1px solid rgba(255,255,255,.12);
}
.footer-top {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(44px, 6vw, 72px) 0 30px;
  display: grid;
  grid-template-columns: 1.12fr .96fr 1.05fr;
  gap: clamp(26px, 4vw, 58px);
}
.footer-brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--surface);
  font-weight: 900;
  font-size: 20px;
}
.footer-logo {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--surface);
  background: var(--primary);
  border: 2px solid var(--accent);
}
.footer-summary {
  margin: 18px 0 0;
  max-width: 430px;
  color: color-mix(in srgb, var(--surface) 70%, white);
  font-size: 14px;
}
.footer-title {
  margin: 0 0 14px;
  color: var(--surface);
  font-size: 16px;
  font-weight: 900;
}
.footer-list {
  display: grid;
  gap: 10px;
  margin: 0;
}
.footer-list div {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}
.footer-list dt {
  color: color-mix(in srgb, var(--surface) 58%, white);
  font-size: 13px;
}
.footer-list dd {
  margin: 0;
  color: color-mix(in srgb, var(--surface) 84%, white);
  overflow-wrap: anywhere;
}
.footer a { color: var(--surface); font-weight: 800; text-decoration: none; }
.footer-records {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}
.footer-records li {
  display: grid;
  grid-template-columns: 98px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}
.footer-records span:first-child {
  color: color-mix(in srgb, var(--surface) 58%, white);
}
.footer-records span:last-child {
  color: color-mix(in srgb, var(--surface) 84%, white);
  overflow-wrap: anywhere;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.10);
}
.footer-bottom-inner {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  color: color-mix(in srgb, var(--surface) 62%, white);
  font-size: 13px;
}
.footer-note {
  margin-top: 18px;
  color: color-mix(in srgb, var(--surface) 54%, white);
  font-size: 12px;
}
@media (max-width: 860px) {
  .nav-links { display: none; }
  .hero { min-height: 680px; }
  .quick-facts, .feature-grid, .split, .download-panel, .seo-columns, .gallery-strip, .overview-layout, .module-grid, .compat-layout, .step-grid, .visual-wall, .faq-list { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .quick-facts { margin-top: 0; padding-top: 12px; width: calc(100% - 36px); }
  .split-media .small-row { grid-template-columns: 1fr; }
  .visual-stack, .statline { grid-template-columns: 1fr; }
  .visual-stack img:first-child, .visual-wall img:first-child, .visual-wall img:nth-child(4) { grid-row: auto; grid-column: auto; }
  .download-panel { gap: 20px; }
  section { padding-left: 18px; padding-right: 18px; }
}
@media (max-width: 520px) {
  .nav { padding: 12px 14px; }
  .brand { max-width: 70%; }
  h1 { font-size: 40px; }
  .hero-inner { width: calc(100% - 28px); padding-bottom: 54px; }
  .hero-actions .btn, .hero-actions .outline-btn { width: 100%; }
  .footer-list div, .footer-records li { grid-template-columns: 1fr; gap: 4px; }
}


.tech-lab .hero { min-height: 660px; }
.tech-lab .fact strong { color: var(--primary); }
.tech-lab .feature-card { background: #fff; }
.tech-lab .gallery-strip { grid-template-columns: 1fr 1fr; }
.tech-lab .gallery-strip img:last-child { grid-column: span 2; max-height: 360px; }
.tech-lab .module-card { border-left: 4px solid var(--accent); }