/* 广州君瑞达信息技术有限公司 — 企业官网静态页（ICP 备案审核用） */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #5c6370;
  --border: #e5e7eb;
  --accent: #1e4d8c;
  --accent-soft: #e8f0fa;
  --max: 880px;
  --radius: 8px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.brand {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.nav a:hover,
.nav a:focus {
  color: var(--accent);
}

/* Hero */
.hero {
  background: var(--surface);
  padding: 3.5rem 0 3rem;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
}

.hero-sub {
  color: var(--muted);
  font-size: 1.05rem;
}

/* Sections */
.section {
  padding: 2.75rem 0;
}

.section-alt {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-soft);
}

.section p {
  color: var(--muted);
  margin-bottom: 1rem;
}

.section p:last-child {
  margin-bottom: 0;
}

.service-list {
  list-style: none;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .service-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-list li {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.section-alt .service-list li {
  background: var(--surface);
}

.service-list h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.service-list p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

.domain-note {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Footer */
.site-footer {
  background: #1a2332;
  color: #c5ccd6;
  padding: 1.75rem 0;
  text-align: center;
  font-size: 0.875rem;
}

.site-footer p {
  margin-bottom: 0.35rem;
}

.site-footer .icp {
  color: #8b95a5;
  font-size: 0.8rem;
}


.site-footer .icp a {
  color: #8b95a5;
  text-decoration: none;
}

.site-footer .icp a:hover,
.site-footer .icp a:focus {
  color: #c5ccd6;
  text-decoration: underline;
}
@media (max-width: 480px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding: 2.5rem 0 2rem;
  }
}