:root {
  --bg: #ffffff;
  --bg-soft: #f5f8f7;
  --bg-band: #edf6f3;
  --text: #18201d;
  --muted: #5d6b66;
  --line: #dce6e2;
  --green: #18785d;
  --green-dark: #105b46;
  --blue: #1f63b7;
  --yellow: #f5c542;
  --card: #ffffff;
  --shadow: 0 18px 45px rgba(18, 46, 37, 0.1);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

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

.narrow {
  max-width: 820px;
  text-align: center;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 190px;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--green);
  color: #ffffff;
  font-size: 15px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.2;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  color: #26332f;
  font-size: 15px;
}

.site-nav a {
  padding: 8px 0;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--green);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.menu-button span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
}

.section,
.section-band {
  padding: 86px 0;
}

.section-soft {
  background: var(--bg-soft);
}

.section-band {
  background: linear-gradient(135deg, #eff8f5 0%, #ffffff 58%, #f2f7fb 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  align-items: center;
  gap: 56px;
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--green);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: 52px;
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: 34px;
  line-height: 1.24;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
}

.hero-lead,
.section-heading p,
.feature-header p,
.plain-copy,
.split-layout > div > p {
  color: var(--muted);
  font-size: 18px;
}

.hero-lead {
  max-width: 720px;
}

.hero-actions,
.tool-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}

.hero-actions.center {
  justify-content: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

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

.button.primary {
  background: var(--green);
  color: #ffffff;
  box-shadow: 0 12px 24px rgba(24, 120, 93, 0.2);
}

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

.button.secondary {
  border-color: var(--line);
  background: #ffffff;
  color: var(--text);
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

.hero-trust span + span::before {
  content: "·";
  margin-right: 12px;
  color: #9aa8a2;
}

.hero-panel {
  display: grid;
  gap: 14px;
}

.workflow-card,
.service-card,
.tool-card,
.scenario-list article,
.domain-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.workflow-card {
  padding: 22px;
  box-shadow: var(--shadow);
}

.workflow-card span {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--blue);
  font-weight: 800;
}

.workflow-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 22px;
}

.workflow-card p,
.service-card p,
.tool-card p,
.scenario-list p,
.domain-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.workflow-card.highlight {
  border-color: rgba(24, 120, 93, 0.32);
  background: #f3fbf8;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.card-grid {
  display: grid;
  gap: 16px;
}

.card-grid.five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

.service-card,
.tool-card {
  padding: 22px;
}

.card-icon {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 16px;
  place-items: center;
  border-radius: var(--radius);
  background: #e6f3ef;
  color: var(--green);
  font-weight: 800;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 56px;
  align-items: start;
}

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

.check-list p {
  margin: 0;
  padding: 16px 18px;
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
  background: #ffffff;
  color: #34423d;
}

.ai-feature {
  background: #ffffff;
}

.feature-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 30px;
  align-items: end;
  margin-bottom: 34px;
}

.tool-domain {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.tool-domain span,
.domain-grid span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
}

.tool-domain strong,
.domain-grid strong {
  color: var(--green-dark);
  font-size: 22px;
}

.tool-actions span {
  color: var(--muted);
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.tool-scenario-list {
  margin-top: 28px;
}

.scenario-list article {
  padding: 22px;
}

.scenario-list strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
}

.contact-section {
  background: var(--green-dark);
}

.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.75fr);
  gap: 36px;
  align-items: center;
  padding: 34px;
  border-radius: var(--radius);
  background: #ffffff;
}

.contact-lines {
  display: grid;
  gap: 10px;
}

.contact-lines p {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.contact-lines span {
  color: var(--muted);
}

.site-footer {
  padding: 26px 0;
  border-top: 1px solid var(--line);
  background: #ffffff;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner p {
  margin: 0;
}

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

.domain-hint {
  margin-top: 18px;
  color: var(--muted);
}

.tag-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.tag-grid span {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  font-weight: 700;
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.domain-grid article {
  padding: 22px;
}

@media (max-width: 980px) {
  h1 {
    font-size: 42px;
  }

  .hero-grid,
  .split-layout,
  .feature-header,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .card-grid.five,
  .card-grid.four,
  .scenario-list,
  .tag-grid,
  .domain-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tool-domain {
    max-width: 360px;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .header-inner {
    min-height: 64px;
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: 64px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #ffffff;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 10px;
  }

  .section,
  .section-band {
    padding: 58px 0;
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 28px;
  }

  .hero-lead,
  .section-heading p,
  .feature-header p,
  .plain-copy,
  .split-layout > div > p {
    font-size: 16px;
  }

  .card-grid.five,
  .card-grid.four,
  .scenario-list,
  .tag-grid,
  .domain-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 24px;
  }

  .contact-lines p,
  .footer-inner {
    display: block;
  }

  .footer-inner p + p {
    margin-top: 8px;
  }
}