:root {
  --color-bg: #f6f9fc;
  --color-surface: #ffffff;
  --color-surface-soft: #eef6fb;
  --color-primary: #123a63;
  --color-primary-strong: #08243d;
  --color-accent: #18a4bd;
  --color-accent-soft: #dff6fa;
  --color-text: #172334;
  --color-muted: #5f6f82;
  --color-border: #d8e3ec;
  --shadow-soft: 0 18px 48px rgba(18, 58, 99, 0.12);
  --shadow-card: 0 10px 30px rgba(18, 58, 99, 0.09);
  --radius: 8px;
  --max-width: 1160px;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(24, 164, 189, 0.45);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  transform: translateY(-140%);
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--color-primary);
  color: #fff;
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(100% - 40px, var(--max-width));
  margin-inline: auto;
}

.section {
  padding: 92px 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 249, 252, 0.88);
  border-bottom: 1px solid rgba(216, 227, 236, 0.8);
  backdrop-filter: blur(16px);
}

.nav {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
}

.brand-mark img {
  display: block;
  width: 36px;
  height: 36px;
  object-fit: cover;
}

.brand strong {
  display: block;
  color: var(--color-primary-strong);
  font-size: 1rem;
  line-height: 1.2;
}

.brand small {
  display: block;
  color: var(--color-muted);
  font-size: 0.78rem;
  line-height: 1.2;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-menu a {
  padding: 10px 14px;
  border-radius: var(--radius);
  color: var(--color-muted);
  font-size: 0.95rem;
  transition:
    color 0.2s ease,
    background 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a.is-active {
  color: var(--color-primary);
  background: var(--color-surface-soft);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--color-primary);
  border-radius: 2px;
  transition:
    transform 0.2s ease,
    opacity 0.2s ease;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(238, 246, 251, 0.9)),
    radial-gradient(circle at 82% 18%, rgba(24, 164, 189, 0.18), transparent 34%),
    linear-gradient(180deg, #f6f9fc 0%, #edf5fa 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(18, 58, 99, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 58, 99, 0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(90deg, #000 0%, transparent 85%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.88fr);
  align-items: center;
  gap: 56px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: var(--color-primary-strong);
  font-size: clamp(2.35rem, 6vw, 5.25rem);
  line-height: 1.05;
}

.hero h1 span {
  display: block;
  color: var(--color-primary);
  font-size: clamp(1.8rem, 4vw, 3.8rem);
}

.hero-lead {
  max-width: 760px;
  margin: 28px 0 16px;
  color: var(--color-primary-strong);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.75;
}

.hero-text {
  max-width: 680px;
  margin: 0;
  color: var(--color-muted);
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 700;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 14px 28px rgba(18, 58, 99, 0.22);
}

.btn-primary:hover {
  background: var(--color-primary-strong);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.74);
  border-color: var(--color-border);
  color: var(--color-primary);
}

.hero-visual {
  padding: 18px;
  border: 1px solid rgba(216, 227, 236, 0.9);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.62);
  box-shadow: var(--shadow-soft);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin: 0;
  color: var(--color-primary-strong);
  font-size: clamp(1.85rem, 3vw, 2.6rem);
  line-height: 1.18;
}

.section-heading p:not(.eyebrow) {
  margin: 12px 0 0;
  color: var(--color-muted);
  font-size: 1.02rem;
}

.services {
  background: var(--color-surface);
}

.service-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.94fr 0.94fr;
  gap: 20px;
}

.service-card,
.member-card,
.news-card,
.project-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.service-card {
  min-height: 320px;
  padding: 28px;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.service-card:hover,
.member-card:hover {
  transform: translateY(-4px);
  border-color: rgba(24, 164, 189, 0.42);
  box-shadow: 0 18px 42px rgba(18, 58, 99, 0.13);
}

.service-card-featured {
  background: linear-gradient(180deg, #ffffff 0%, #edf8fb 100%);
}

.card-kicker {
  display: inline-flex;
  margin-bottom: 20px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 800;
}

.service-card h3,
.member-card h3,
.news-card h3,
.project-panel h3 {
  margin: 0;
  color: var(--color-primary-strong);
  line-height: 1.35;
}

.service-card p,
.member-card p,
.news-card p,
.timeline p {
  color: var(--color-muted);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  color: var(--color-accent);
  font-weight: 800;
}

.text-link:hover {
  color: var(--color-primary);
}

.tag-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fbfdff;
  color: var(--color-primary);
  font-weight: 650;
}

.tag-list.compact {
  flex-direction: row;
  flex-wrap: wrap;
}

.news-section {
  overflow: hidden;
  background: linear-gradient(180deg, #f6f9fc 0%, #eef6fb 100%);
}

.news-marquee {
  width: 100%;
  overflow: hidden;
}

.news-track {
  display: flex;
  gap: 18px;
  width: max-content;
  padding: 4px 20px 18px;
  animation: marquee 30s linear infinite;
}

.news-marquee:hover .news-track,
.news-marquee.is-paused .news-track {
  animation-play-state: paused;
}

.news-card {
  width: 340px;
  min-height: 210px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.88);
}

.news-card span {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.news-card p {
  margin-bottom: 0;
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

.team {
  background: var(--color-surface);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.member-card {
  padding: 26px;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.member-card .role {
  margin: 8px 0 14px;
  color: var(--color-accent);
  font-weight: 800;
}

.project-panel {
  margin-top: 28px;
  padding: 28px;
  background: linear-gradient(180deg, #ffffff 0%, #f4f9fc 100%);
}

.timeline {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.timeline article {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
}

.timeline time {
  color: var(--color-accent);
  font-weight: 900;
}

.timeline h4 {
  margin: 0;
  color: var(--color-primary);
}

.timeline p {
  margin: 6px 0 0;
}

.site-footer {
  padding: 48px 0;
  background: var(--color-primary-strong);
  color: rgba(255, 255, 255, 0.78);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(120px, 0.42fr) minmax(360px, 1.12fr);
  gap: 34px;
}

.footer-brand strong,
.footer-brand small {
  color: #fff;
}

.site-footer h2 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 1rem;
}

.site-footer a:not(.brand) {
  display: block;
  margin: 8px 0;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer a:hover {
  color: #fff;
}

.copyright {
  margin-top: 22px;
  font-size: 0.88rem;
}

.beian {
  margin-top: 6px;
  font-size: 0.88rem;
}

.contact-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.contact-list dt,
.contact-list dd {
  margin: 0;
}

.contact-list dt {
  color: rgba(255, 255, 255, 0.62);
}

.contact-list dd {
  min-width: 0;
  color: rgba(255, 255, 255, 0.86);
  overflow-wrap: anywhere;
}

.contact-list dd strong,
.contact-list dd a {
  font-weight: 800;
}

@media (max-width: 920px) {
  .hero-grid,
  .service-grid,
  .team-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 56px;
  }

  .hero-visual {
    max-width: 640px;
  }
}

@media (max-width: 720px) {
  :root {
    --header-height: 64px;
  }

  .container {
    width: min(100% - 28px, var(--max-width));
  }

  .section {
    padding: 68px 0;
  }

  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 1px);
    right: 14px;
    left: 14px;
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-soft);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition:
      transform 0.2s ease,
      opacity 0.2s ease;
  }

  .nav-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu a {
    padding: 12px 14px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .hero-visual {
    padding: 10px;
  }

  .service-card {
    min-height: auto;
  }

  .news-card {
    width: 292px;
  }

  .timeline article {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .contact-list div {
    grid-template-columns: 66px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}