:root {
  --bg: #f4fbff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.96);
  --text: #10243f;
  --muted: #4e6a8a;
  --line: rgba(46, 132, 209, 0.18);
  --accent: #1aa7ff;
  --accent-dark: #0d84e0;
  --accent-soft: rgba(26, 167, 255, 0.12);
  --shadow: 0 24px 70px rgba(31, 107, 176, 0.16);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(68, 196, 255, 0.2), transparent 24%),
    radial-gradient(circle at 85% 16%, rgba(129, 200, 255, 0.26), transparent 22%),
    radial-gradient(circle at 50% 120%, rgba(30, 140, 226, 0.18), transparent 36%),
    linear-gradient(180deg, #f8fdff 0%, #eef8ff 56%, #f4fbff 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 132, 209, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 132, 209, 0.08) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black 36%, transparent 88%);
  opacity: 0.35;
}

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

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

.container {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(248, 253, 255, 0.76);
  border-bottom: 1px solid rgba(46, 132, 209, 0.12);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 74px;
}

.brand {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a:hover,
.footer-content a:hover {
  color: var(--text);
}

.hero,
.section {
  padding: 72px 0;
}

.hero-grid,
.about-grid,
.gallery-grid,
.contact-card,
.footer-content {
  display: grid;
  gap: 24px;
}

.hero-grid {
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.lead,
.card p,
.contact-text,
.policy-card p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}

.hero-copy {
  padding: 18px 0;
}

.hero-copy h1 {
  max-width: 10ch;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-badges span {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--accent-soft);
  color: #0f4d84;
  font-size: 0.92rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 600;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #fff;
  background: var(--accent);
}

.button.primary:hover {
  background: var(--accent-dark);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
}

.hero-visual img,
.gallery-card,
.card,
.contact-card,
.policy-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  background: var(--surface);
  backdrop-filter: blur(18px);
}

.hero-visual img {
  width: 100%;
  padding: 14px;
}

.section-heading {
  max-width: 620px;
  margin-bottom: 28px;
}

.about-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.card::before,
.contact-card::before,
.policy-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(26, 167, 255, 0.16), transparent 68%);
  pointer-events: none;
}

.gallery-section {
  padding-top: 24px;
}

.gallery-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gallery-card {
  overflow: hidden;
}

.gallery-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.gallery-card figcaption {
  padding: 16px 18px 18px;
  color: var(--muted);
}

.contact-card {
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.contact-list {
  display: grid;
  gap: 14px;
  min-width: min(100%, 320px);
}

.contact-list a {
  display: block;
}

.contact-list a,
.contact-item {
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.76);
}

.contact-item {
  color: var(--text);
  line-height: 1.7;
}

.site-footer {
  padding: 24px 0 40px;
}

.footer-content {
  grid-template-columns: 1fr auto;
  align-items: center;
  color: var(--muted);
  font-size: 0.95rem;
}

.subpage-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 0;
}

.policy-shell {
  width: min(calc(100% - 32px), 860px);
}

.policy-card {
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.policy-card h2 {
  margin-top: 28px;
  margin-bottom: 10px;
  font-size: 1.3rem;
}

.back-link,
.policy-note {
  color: var(--muted);
}

.back-link {
  display: inline-flex;
  margin-bottom: 24px;
}

.policy-card a {
  color: var(--accent);
}

@media (max-width: 920px) {
  .hero-grid,
  .contact-card,
  .footer-content,
  .about-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .contact-list {
    min-width: 0;
  }

  .hero-copy h1 {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .nav {
    padding: 14px 0;
    align-items: flex-start;
  }

  .nav,
  .nav-links {
    flex-direction: column;
  }

  .hero,
  .section {
    padding: 56px 0;
  }

  .policy-card,
  .card,
  .contact-card {
    padding: 24px;
  }

  .hero-badges {
    gap: 10px;
  }
}