:root {
  color-scheme: light;
  --ink: #17201d;
  --muted: #5b6763;
  --line: #dde5e2;
  --paper: #ffffff;
  --soft: #f4f8f6;
  --wash: #eef5f2;
  --accent: #0f766e;
  --accent-2: #a16207;
  --accent-dark: #115e59;
  --shadow: 0 18px 48px rgba(21, 48, 42, 0.10);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(180deg, #f8fbfa 0%, #fff 340px);
  line-height: 1.72;
}

a { color: inherit; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(221, 229, 226, 0.85);
  background: rgba(255,255,255,0.96);
  position: sticky;
  top: 0;
  z-index: 2;
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 850;
  text-decoration: none;
}

.mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-weight: 900;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  color: var(--muted);
  font-size: 15px;
}

nav a { text-decoration: none; }
nav a[aria-current="page"] { color: var(--accent-dark); font-weight: 800; }

main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  align-items: center;
  gap: clamp(28px, 5vw, 64px);
  padding: clamp(56px, 8vw, 104px) 0;
}

.hero-copy { max-width: 760px; }
.eyebrow { color: var(--accent-dark); font-weight: 850; margin: 0 0 12px; }

h1 {
  margin: 0 0 24px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 { margin: 0 0 16px; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; letter-spacing: 0; }
h3 { margin: 0 0 8px; font-size: 21px; }
p { margin: 0 0 14px; }

.lead {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.35;
  font-weight: 750;
}

.hero-detail, .page-lead {
  font-size: 19px;
  color: var(--muted);
}

.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 800;
  text-decoration: none;
  background: white;
}
.button.primary { background: var(--accent); color: white; border-color: var(--accent); }

.signal-panel {
  display: grid;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.signal-panel div { padding: 18px; border-radius: 10px; background: var(--soft); }
.signal-label { display: block; color: var(--muted); font-size: 14px; }
.signal-panel strong { display: block; font-size: 26px; margin-top: 4px; }

section { padding: 58px 0; }
.definition-band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
blockquote {
  margin: 20px 0 0;
  padding: 28px;
  border-left: 6px solid var(--accent);
  background: var(--wash);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.42;
  font-weight: 850;
}

.section-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.cards article,
.service-list article,
.case-list article,
.qa-list article {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
  background: #fff;
  box-shadow: 0 10px 30px rgba(21,48,42,0.05);
}

.steps {
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.steps li {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  background: var(--soft);
}
.steps strong { display: block; margin-bottom: 8px; font-size: 19px; }
.steps span { color: var(--muted); }

.scenario-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.tag-cloud a {
  text-decoration: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 8px 13px;
  font-weight: 750;
}

.cta {
  margin: 56px 0 72px;
  padding: 36px;
  border-radius: 16px;
  background: #133b36;
  color: white;
}
.cta p { color: rgba(255,255,255,0.78); max-width: 820px; }
.cta .eyebrow { color: #9fe3d8; }

.narrow, .article {
  width: min(860px, calc(100% - 40px));
  padding: 56px 0 72px;
}

.service-list, .case-list, .qa-list {
  display: grid;
  gap: 18px;
  margin-top: 30px;
}

.service-list ul { margin-bottom: 0; }
.article-list { font-size: 20px; }
.article-list li { margin: 10px 0; }

.monitor-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 28px;
  background: white;
  border: 1px solid var(--line);
}
.monitor-table th, .monitor-table td {
  border-bottom: 1px solid var(--line);
  padding: 14px;
  text-align: left;
  vertical-align: top;
}
.monitor-table th { background: var(--soft); }

footer {
  border-top: 1px solid var(--line);
  padding: 32px clamp(20px, 5vw, 72px);
  color: var(--muted);
}

@media (max-width: 860px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .hero, .section-grid { grid-template-columns: 1fr; min-height: unset; }
  .cards, .steps { grid-template-columns: 1fr; }
  h1 { font-size: 42px; }
  .signal-panel strong { font-size: 22px; }
}