:root {
  --blue: #0073bc;
  --green: #199c48;
  --yellow: #fdb500;
  --orange: #f95b18;
  --ink: #3f3f3e;
  --paper: #f5f7f8;
  --muted: #6a6a69;
  --line: #e2e6ea;
  --mist: #e7f2fa;
  --white: #ffffff;
  --brand-bar: linear-gradient(90deg, #0073bc, #199c48 38%, #fdb500 68%, #f95b18);
  --max: 1120px;
  --radius: 0;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; cursor: pointer; border: none; background: none; }

.brand-bar {
  height: 4px;
  background: var(--brand-bar);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav {
  position: sticky;
  top: 4px;
  z-index: 40;
  background: rgba(245, 247, 248, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
.nav.is-scrolled { border-bottom-color: var(--line); background: rgba(255,255,255,.94); }
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo { height: 32px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 15px;
  color: var(--muted);
}
.nav-links a:hover { color: var(--blue); }
.nav-links a[aria-current="page"] { color: var(--blue); font-weight: 560; }
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--blue);
  color: var(--white);
  font-size: 14px;
  font-weight: 560;
}
.nav-links a.nav-cta:hover {
  color: var(--white);
  filter: brightness(1.08);
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--ink);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 560;
  transition: transform .18s ease, filter .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: var(--white); border-color: #cfd6dc; }
.btn-sm {
  min-height: 36px;
  padding: 0 14px;
  border-radius: 8px;
  font-size: 13px;
}

section { padding: 88px 0; }
.section-kicker {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--orange);
  font-weight: 600;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 560;
  letter-spacing: -.02em;
  line-height: 1.25;
  margin-bottom: 16px;
}
.section-title em {
  font-style: normal;
  color: var(--blue);
}
.section-desc {
  font-size: 17px;
  color: var(--muted);
  max-width: 40em;
  margin-bottom: 40px;
}
.section-cta {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.band {
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.band-soft {
  background:
    radial-gradient(600px 280px at 100% 0%, rgba(0,115,188,.06), transparent 70%),
    var(--white);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.value-item {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  transition: border-color .2s ease, transform .2s ease;
}
.value-item:hover {
  border-color: #c5d8e8;
  transform: translateY(-2px);
}
.value-item .n {
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 14px;
}
.value-item h3 {
  font-size: 20px;
  font-weight: 560;
  margin-bottom: 10px;
}
.value-item h3 em {
  font-style: normal;
  font-weight: 650;
  color: var(--blue);
}
.value-item p {
  font-size: 15px;
  color: var(--muted);
}
.scene-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}
.scene-tags span {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 12px;
  flex: 0 0 auto;
}

.chip {
  font-size: 12px;
  font-weight: 560;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--mist);
  color: var(--blue);
}
.chip.green { background: #e7f6ec; color: var(--green); }
.chip.orange { background: #ffefe8; color: var(--orange); }

.agent-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.agent-card {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}
.agent-card .tag {
  display: inline-block;
  font-size: 12px;
  color: var(--blue);
  background: var(--mist);
  border-radius: 999px;
  padding: 4px 10px;
  margin-bottom: 12px;
}
.agent-card h3 {
  font-size: 17px;
  font-weight: 560;
  margin-bottom: 8px;
}
.agent-card p {
  font-size: 14px;
  color: var(--muted);
}

.cta-band {
  padding: 56px 0;
  background:
    radial-gradient(700px 320px at 20% 0%, rgba(0,115,188,.18), transparent 60%),
    linear-gradient(180deg, #0b4f7d 0%, #0073bc 100%);
  color: #f6f4f0;
}
.cta-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px 48px;
  align-items: center;
}
.cta-band .section-title { color: #fff; margin-bottom: 12px; }
.cta-band .section-desc {
  color: rgba(246,244,240,.78);
  margin-bottom: 0;
  max-width: 34em;
}
.cta-panel {
  flex-shrink: 0;
  padding: 12px;
  border-radius: 0;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.22);
}
.cta-qr {
  width: 160px;
  height: 160px;
  border-radius: 0;
  background: var(--white);
  padding: 8px;
  object-fit: contain;
}

footer {
  padding: 36px 0 48px;
  background: var(--ink);
  color: rgba(246,244,240,.72);
  font-size: 14px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-logo {
  height: 28px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: .9;
}
.footer-meta { display: flex; flex-direction: column; gap: 6px; }
.footer-beian {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  font-size: 12px;
  color: rgba(246,244,240,.55);
}
.footer-beian a {
  color: inherit;
  text-decoration: none;
}
.footer-beian a:hover { color: rgba(246,244,240,.85); }
.footer-beian .sep { margin: 0 8px; opacity: .7; }
.footer-beian img {
  display: inline-block;
  vertical-align: middle;
  margin-right: 4px;
  height: 14px;
  width: auto;
}

@media (max-width: 960px) {
  .value-grid,
  .agent-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav.open .nav-links {
    display: flex;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 16px 40px rgba(63,63,62,.1);
  }
  .nav.open .nav-links a {
    padding: 12px 14px;
    border-radius: 8px;
  }
  .nav.open .nav-links a:hover { background: var(--paper); }
  .nav-toggle { display: inline-flex; }
  .nav-inner .nav-cta { display: none; }

  .value-grid,
  .agent-grid {
    grid-template-columns: 1fr;
  }
  section { padding: 64px 0; }
  .cta-layout {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }
  .cta-band .section-desc { margin-left: auto; margin-right: auto; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}