:root {
  --ink: #202124;
  --muted: #626b76;
  --line: #dce2ea;
  --paper: #ffffff;
  --soft: #f4f7f8;
  --blue: #145c9e;
  --green: #0f766e;
  --amber: #b56b26;
  --red: #b33a3a;
  --shadow: 0 18px 45px rgba(24, 39, 75, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.is-missing { display: none !important; }
.wrap { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(220, 226, 234, 0.9);
}
.nav-wrap { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand img { width: 152px; height: auto; }
.desktop-nav { display: flex; align-items: center; gap: 18px; font-size: 15px; color: var(--muted); }
.desktop-nav > a, .nav-group > button {
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  cursor: pointer;
}
.desktop-nav a:hover, .nav-group > button:hover { color: var(--blue); }
.nav-group { position: relative; }
.nav-menu {
  position: absolute;
  top: 42px;
  right: 0;
  width: 260px;
  display: grid;
  gap: 4px;
  padding: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: .18s ease;
}
.nav-group:hover .nav-menu, .nav-group:focus-within .nav-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-menu a { padding: 10px; border-radius: 8px; color: var(--ink); }
.nav-menu a:hover { background: var(--soft); }
.nav-menu small { display: block; color: var(--muted); font-size: 12px; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: #fff; border-radius: 8px; }
.menu-toggle span { display: block; width: 20px; height: 2px; margin: 5px auto; background: var(--ink); }
.mobile-nav { display: none; border-top: 1px solid var(--line); padding: 12px 16px 20px; background: #fff; }
.mobile-nav a { display: block; padding: 10px 4px; color: var(--ink); border-bottom: 1px solid var(--soft); }

.hero {
  position: relative;
  min-height: 74vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(135deg, #20302c 0%, #1d4d70 55%, #6d4c2c 100%);
}
.hero-compact { min-height: 58vh; }
.hero-image, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-image { object-fit: cover; }
.hero-shade {
  background: linear-gradient(90deg, rgba(18, 28, 36, .9) 0%, rgba(18, 28, 36, .72) 45%, rgba(18, 28, 36, .2) 100%);
}
.hero-content { position: relative; z-index: 1; padding: 80px 0 64px; }
.eyebrow {
  margin: 0 0 14px;
  color: var(--amber);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}
.hero .eyebrow { color: #f0b36d; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { max-width: 840px; margin-bottom: 16px; font-size: 56px; line-height: 1.08; letter-spacing: 0; }
.hero .subtitle { max-width: 780px; margin-bottom: 18px; font-size: 28px; line-height: 1.35; font-weight: 700; }
.hero-text { max-width: 680px; font-size: 19px; color: rgba(255, 255, 255, .9); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 800;
  cursor: pointer;
}
.button.primary { color: #fff; background: var(--blue); }
.button.secondary { color: var(--ink); background: #fff; border-color: var(--line); }
.button:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  max-width: 760px;
  gap: 12px;
  margin: 42px 0 0;
}
.hero-stats div, .metric-list div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, .22);
  background: rgba(255, 255, 255, .1);
  border-radius: 8px;
}
.hero-stats dt, .metric-list dt { font-size: 28px; font-weight: 900; line-height: 1; }
.hero-stats dd, .metric-list dd { margin: 8px 0 0; color: rgba(255, 255, 255, .82); }

.band { padding: 88px 0; background: var(--paper); }
.band.alt { background: var(--soft); }
.section-head { max-width: 760px; margin-bottom: 38px; }
.section-head h2 { margin-bottom: 12px; font-size: 40px; line-height: 1.18; }
.section-head p { color: var(--muted); font-size: 18px; }
.split { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 56px; }
.feature-media { margin: 0; }
.feature-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 8px; }
.feature-media figcaption { margin-top: 12px; color: var(--muted); font-size: 14px; }
.mini-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.mini-link {
  display: block;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.mini-link strong { display: block; font-size: 18px; }
.mini-link span { color: var(--muted); font-size: 14px; }
.as-chip { color: var(--ink); }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card-grid.two-col { grid-template-columns: repeat(2, 1fr); }
.info-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(24, 39, 75, 0.03);
}
.info-card > img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.info-card-body { padding: 22px; }
.info-card h3 { margin-bottom: 8px; font-size: 22px; line-height: 1.28; }
.info-card p { color: var(--muted); }
.info-card .lead { color: var(--ink); font-weight: 700; }
.number { color: var(--blue); font-weight: 900; font-size: 15px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tags span {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--green);
  font-size: 13px;
  background: #fff;
}
.process, .method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.process article, .method-grid article, .compare article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.process span, .method-grid span {
  display: block;
  color: var(--amber);
  font-weight: 900;
  font-size: 22px;
  margin-bottom: 14px;
}
.process h3, .method-grid h3 { font-size: 22px; margin-bottom: 8px; }
.process p, .method-grid p { color: var(--muted); }
.center-actions { margin-top: 34px; text-align: center; }

.timeline { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.timeline.four { grid-template-columns: repeat(4, 1fr); }
.timeline article {
  padding: 26px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}
.timeline time { display: block; color: var(--blue); font-size: 34px; font-weight: 900; line-height: 1; margin-bottom: 16px; }
.timeline p { color: var(--muted); }

.brand-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.brand-card {
  display: grid;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
.brand-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.brand-card div { padding: 20px; }
.brand-card p { margin-bottom: 6px; color: var(--green); font-weight: 800; }
.brand-card h3 { margin-bottom: 8px; font-size: 24px; }
.brand-card span { color: var(--muted); }

.wide-step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 44px;
  padding: 46px 0;
  border-bottom: 1px solid var(--line);
}
.wide-step.reverse img { order: -1; }
.wide-step h2 { font-size: 38px; line-height: 1.18; }
.wide-step .lead { color: var(--ink); font-size: 20px; font-weight: 800; }
.wide-step p { color: var(--muted); }
.wide-step img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 8px; }

.compare { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.compare strong { color: var(--blue); font-size: 22px; }
.metric-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 28px 0 0;
}
.metric-list div { background: var(--blue); border-color: var(--blue); color: #fff; }
.metric-list dd { color: rgba(255,255,255,.85); }
.result { padding-top: 10px; border-top: 1px solid var(--line); }
.location-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.location-grid p {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.big-copy { font-size: 22px; color: var(--muted); }

.cta-band {
  padding: 80px 0;
  color: #fff;
  background: linear-gradient(135deg, #1f3d35 0%, #145c9e 55%, #8b5a2b 100%);
}
.cta-band h2 { max-width: 780px; margin-bottom: 12px; font-size: 42px; line-height: 1.2; }
.cta-band p { max-width: 700px; color: rgba(255,255,255,.85); font-size: 18px; }
.cta-band .button.primary { background: #fff; color: var(--ink); margin-top: 18px; }

.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 44px; align-items: start; }
.contact-form {
  display: grid;
  gap: 14px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}
.contact-form label { display: grid; gap: 7px; font-weight: 800; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 13px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}
.contact-form textarea { resize: vertical; }
.contact-form .button { width: 100%; border: 0; }
.form-note { color: var(--muted); font-size: 13px; margin: 0; }

.site-footer { padding: 58px 0 0; background: #eef3f4; border-top: 1px solid var(--line); }
.footer-grid {
  display: grid;
  grid-template-columns: minmax(205px, 1fr) minmax(145px, .75fr) minmax(470px, 1.7fr) minmax(120px, .55fr);
  gap: 24px;
  align-items: start;
}
.footer-logo { width: 156px; margin-bottom: 16px; }
.site-footer h2 { font-size: 18px; margin-bottom: 14px; }
.site-footer p, .site-footer address, .site-footer small { color: var(--muted); font-style: normal; }
.site-footer address { display: grid; gap: 4px; font-size: 14px; line-height: 1.65; }
.site-footer address span { white-space: nowrap; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer li small { display: block; font-size: 12px; }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-tags span { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 4px 9px; font-size: 12px; color: var(--blue); }
.qr { width: 118px; height: 118px; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); background: #fff; }
.qr-copy { display: grid; gap: 2px; line-height: 1.5; }
.qr-copy span { display: block; }
.copyright { margin-top: 34px; padding: 18px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; text-align: center; }

@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .menu-toggle { display: block; }
  .mobile-nav.open { display: block; }
  .hero h1 { font-size: 42px; }
  .hero .subtitle { font-size: 24px; }
  .hero-stats, .card-grid, .brand-grid, .process, .method-grid, .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .wide-step, .contact-layout { grid-template-columns: 1fr; }
  .wide-step.reverse img { order: 0; }
  .timeline.four { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .wrap { width: min(100% - 24px, 1160px); }
  .nav-wrap { height: 64px; }
  .brand img { width: 132px; }
  .hero, .hero-compact { min-height: 66vh; }
  .hero-content { padding: 56px 0 46px; }
  .hero h1 { font-size: 34px; }
  .hero .subtitle { font-size: 20px; }
  .hero-text, .section-head p, .cta-band p { font-size: 16px; }
  .hero-stats, .card-grid, .brand-grid, .process, .method-grid, .timeline, .timeline.four, .mini-grid, .metric-list, .location-grid, .footer-grid, .compare { grid-template-columns: 1fr; }
  .site-footer address span { white-space: normal; }
  .band { padding: 58px 0; }
  .section-head h2, .wide-step h2, .cta-band h2 { font-size: 30px; }
  .actions { width: 100%; }
  .button { width: 100%; }
}