:root {
  --bg: #f6f8fc;
  --text: #1b2432;
  --muted: #607089;
  --line: #dbe4f0;
  --primary: #175fe6;
  --primary-soft: #edf4ff;
  --accent: #3a9d8f;
  --surface: #ffffff;
  --surface-soft: #f2f6fb;
  --ink: #111827;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(17, 24, 39, 0.06);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  color: #182231;
  font-size: 1.15rem;
  font-weight: 700;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: #58677e;
}

.nav a:hover,
.nav a:focus-visible {
  color: #182231;
}

.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: stretch;
  overflow: hidden;
  background: linear-gradient(180deg, #f7faff 0%, #eef4fb 100%);
  color: var(--text);
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(247, 250, 255, 0.96) 0%, rgba(247, 250, 255, 0.88) 42%, rgba(247, 250, 255, 0.6) 100%),
    url("assets/hero-server.png") center/cover no-repeat;
  opacity: 0.95;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: center;
  gap: 22px;
  padding: 112px 0 86px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
}

.hero h1,
.section h2 {
  margin: 0;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 1.06;
}

.hero-copy {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

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

.btn {
  min-width: 132px;
  padding: 14px 20px;
  border-radius: 8px;
  font-weight: 700;
  text-align: center;
}

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

.btn-secondary {
  background: rgba(255, 255, 255, 0.78);
  color: #223047;
  border: 1px solid rgba(23, 95, 230, 0.14);
}

.hero-stats {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 820px;
}

.hero-stats li {
  padding-top: 18px;
  border-top: 1px solid rgba(23, 95, 230, 0.14);
}

.hero-stats strong {
  display: block;
  font-size: 1.45rem;
  color: #182231;
}

.hero-stats span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

.intro-band {
  background: var(--surface);
  border-bottom: 1px solid #e7edf6;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  padding: 26px 0;
}

.intro-grid p {
  margin: 6px 0 0;
  color: #42526b;
  line-height: 1.9;
}

.intro-label {
  font-size: 0.88rem;
  color: #74839a;
}

.section {
  padding: 88px 0;
}

.section.soft {
  background: #eef4fb;
}

.section-head {
  max-width: 720px;
  margin-bottom: 34px;
}

.section-head.narrow {
  max-width: 640px;
}

.section h2 {
  font-size: clamp(1.85rem, 4vw, 3rem);
  line-height: 1.14;
}

.card-grid,
.strength-grid {
  display: grid;
  gap: 20px;
}

.card-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card,
.strength-grid article,
.process-list div {
  background: #fff;
  border: 1px solid #dbe5f2;
  border-radius: 8px;
  padding: 26px;
}

.card h3,
.strength-grid h3,
.site-footer h3,
.site-footer h4 {
  margin-top: 0;
}

.card p,
.strength-grid p,
.process-copy p,
.site-footer p {
  line-height: 1.8;
}

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

.process-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: start;
}

.process-copy p:last-child {
  color: #4b5f79;
}

.process-list {
  display: grid;
  gap: 14px;
}

.process-list div {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  gap: 16px;
}

.process-list span {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #edf4ff;
  color: #156ff0;
  font-weight: 700;
}

.process-list p {
  margin: 0;
  font-weight: 600;
}

.site-footer {
  background: #ffffff;
  color: #54657d;
  padding: 36px 0 48px;
  border-top: 1px solid #e0e8f2;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
}

@media (max-width: 980px) {
  .card-grid,
  .strength-grid,
  .process-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .strength-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding-top: 104px;
  }
}

@media (max-width: 720px) {
  .wrap {
    width: min(100% - 32px, 1120px);
  }

  .header-row {
    min-height: 64px;
    align-items: flex-start;
    padding: 12px 0;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .nav {
    display: grid;
    gap: 10px;
  }

  .intro-grid,
  .card-grid,
  .strength-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .hero-stats {
    gap: 14px;
  }

  .section {
    padding: 72px 0;
  }
}