:root {
  --huopu-primary: #0f4c81;
  --huopu-secondary: #118ab2;
  --huopu-accent: #20c5c9;
  --huopu-dark: #0b1727;
  --huopu-surface: #ffffff;
  --huopu-bg: #f4f8fb;
  --huopu-soft: #eaf4fa;
  --huopu-border: rgba(15, 76, 129, .12);
  --text: #1f2937;
  --muted: #64748b;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(32,197,201,.10), transparent 22%),
    radial-gradient(circle at right center, rgba(17,138,178,.08), transparent 25%),
    var(--huopu-bg);
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
.container { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(15, 76, 129, .08);
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 78px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.brand-mark {
  width: 50px;
  height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--huopu-primary), var(--huopu-accent));
  box-shadow: 0 12px 24px rgba(15, 76, 129, .24);
}
.brand-text strong, .brand-text em {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand-text strong { font-size: 16px; }
.brand-text em { font-size: 12px; color: var(--muted); font-style: normal; }
.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
  color: #344054;
}
.nav a { position: relative; }
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--huopu-primary), var(--huopu-accent));
  transition: width .25s ease;
}
.nav a:hover::after { width: 100%; }
.menu-toggle {
  display: none;
  border: 0;
  background: #fff;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  font-size: 22px;
  box-shadow: 0 6px 16px rgba(15, 23, 42, .08);
}

.hero {
  padding: 56px 0 44px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 28px;
  align-items: stretch;
}
.hero-copy {
  padding: 44px 0 20px;
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--huopu-primary);
  font-size: 13px;
  letter-spacing: .16em;
  font-weight: 700;
}
.hero h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.15;
  color: var(--huopu-dark);
}
.hero-desc {
  margin: 22px 0 0;
  font-size: 17px;
  color: #475467;
  max-width: 760px;
}
.hero-actions, .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-actions { margin-top: 26px; }
.hero-meta {
  margin-top: 18px;
  font-size: 14px;
  color: var(--muted);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 136px;
  padding: 13px 18px;
  border-radius: 16px;
  font-weight: 700;
  transition: transform .22s ease, box-shadow .22s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--huopu-primary), var(--huopu-secondary));
  box-shadow: 0 12px 22px rgba(15, 76, 129, .24);
}
.btn-secondary {
  background: rgba(255,255,255,.88);
  border: 1px solid rgba(15, 76, 129, .14);
  color: var(--huopu-primary);
}
.hero-panels {
  position: relative;
  padding: 22px;
  border-radius: 30px;
  background:
    linear-gradient(165deg, rgba(255,255,255,.88), rgba(255,255,255,.70)),
    linear-gradient(135deg, rgba(32,197,201,.14), rgba(15,76,129,.12));
  border: 1px solid rgba(255,255,255,.55);
  box-shadow: 0 30px 60px rgba(15, 76, 129, .12);
  overflow: hidden;
}
.hero-panels::before {
  content: "";
  position: absolute;
  inset: auto -60px -60px auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(32,197,201,.12);
  filter: blur(8px);
}
.metric-card {
  position: relative;
  background: rgba(255,255,255,.86);
  border: 1px solid rgba(15,76,129,.10);
  border-radius: 24px;
  padding: 22px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, .06);
}
.metric-card.primary {
  background: linear-gradient(135deg, rgba(15,76,129,.94), rgba(17,138,178,.90));
  color: #fff;
}
.metric-card span {
  display: block;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  opacity: .84;
}
.metric-card strong {
  display: block;
  margin: 10px 0 10px;
  font-size: 23px;
  line-height: 1.4;
}
.metric-card p {
  margin: 0;
  color: inherit;
  opacity: .9;
}
.metric-row {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.section { padding: 82px 0; }
.section-soft { background: linear-gradient(180deg, rgba(234,244,250,.95), rgba(255,255,255,.88)); }
.section-dark {
  background: linear-gradient(135deg, #0e2438, #123f63 58%, #156d86);
  color: #fff;
}
.section-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 26px;
  align-items: start;
}
.section-tag {
  margin: 0 0 12px;
  color: var(--huopu-secondary);
  letter-spacing: .16em;
  font-size: 13px;
  font-weight: 700;
}
.section-dark .section-tag { color: rgba(255,255,255,.76); }
h2 {
  margin: 0 0 18px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
}
.section p { margin: 0 0 16px; }
.info-panel {
  background: #fff;
  border: 1px solid var(--huopu-border);
  border-radius: 24px;
  padding: 26px 24px;
  box-shadow: 0 16px 32px rgba(15, 23, 42, .06);
}
.info-panel h3 { margin-top: 0; font-size: 24px; }
.bullet-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.bullet-list li {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(17,138,178,.08);
  color: #184363;
}
.service-grid, .scene-grid, .news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.service-card, .news-card, .insight-card, .scene-grid article {
  border-radius: 24px;
  padding: 24px;
  transition: transform .22s ease, box-shadow .22s ease;
}
.service-card, .news-card, .insight-card {
  background: rgba(255,255,255,.92);
  border: 1px solid var(--huopu-border);
  box-shadow: 0 18px 30px rgba(15, 23, 42, .05);
}
.service-card:hover, .news-card:hover, .insight-card:hover, .scene-grid article:hover {
  transform: translateY(-4px);
}
.service-card h3, .news-card h3, .insight-card h3, .scene-grid article h3 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.4;
}
.section-head { margin-bottom: 26px; }
.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.timeline article {
  background: #fff;
  border: 1px solid var(--huopu-border);
  border-radius: 24px;
  padding: 24px;
  position: relative;
  box-shadow: 0 14px 28px rgba(15, 23, 42, .05);
}
.timeline span {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--huopu-primary), var(--huopu-accent));
  margin-bottom: 14px;
}
.scene-grid article {
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08);
}
.scene-grid article p,
.section-head-light p,
.section-dark p {
  color: rgba(255,255,255,.84);
}
.news-card span, .insight-card span {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--huopu-secondary);
  font-weight: 700;
}
.text-link {
  display: inline-flex;
  margin-top: 10px;
  color: var(--huopu-primary);
  font-weight: 700;
}
.contact-wrap { padding-top: 74px; }
.contact-card-huopu {
  display: grid;
  grid-template-columns: 1fr .9fr;
  gap: 24px;
  align-items: stretch;
  background: linear-gradient(135deg, rgba(255,255,255,.92), rgba(234,244,250,.95));
  border: 1px solid var(--huopu-border);
  border-radius: 28px;
  padding: 30px;
  box-shadow: 0 24px 42px rgba(15, 23, 42, .08);
}
.contact-box {
  background: linear-gradient(135deg, var(--huopu-primary), #0f6f8f);
  color: #fff;
  border-radius: 24px;
  padding: 28px;
}
.contact-label {
  margin: 0;
  font-size: 14px;
  letter-spacing: .08em;
  opacity: .8;
}
.contact-value {
  display: inline-block;
  margin: 12px 0 8px;
  font-size: 34px;
  font-weight: 800;
}
.contact-note {
  margin: 0 0 8px;
  color: rgba(255,255,255,.84);
}
.footer {
  padding: 22px 0 34px;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: #667085;
  font-size: 14px;
}

@media (max-width: 1040px) {
  .hero-grid, .section-grid, .contact-card-huopu, .timeline, .service-grid, .scene-grid, .news-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: calc(100% + 8px);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
    gap: 12px;
    background: rgba(255,255,255,.98);
    border: 1px solid rgba(15, 76, 129, .10);
    border-radius: 18px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, .12);
  }
  .nav.open { display: flex; }
  .brand-text strong { max-width: 210px; }
  .hero-grid, .section-grid, .contact-card-huopu, .timeline, .service-grid, .scene-grid, .news-grid, .metric-row {
    grid-template-columns: 1fr;
  }
  .hero { padding-top: 28px; }
  .hero-copy { padding-top: 10px; }
  .section { padding: 64px 0; }
  .contact-value { font-size: 28px; }
}