:root {
  --bg: #f6fbf8;
  --surface: #ffffff;
  --ink: #10241c;
  --muted: #5b6f66;
  --green: #0b7a53;
  --green-dark: #075f42;
  --green-soft: #e6f5ed;
  --blue: #0f5f87;
  --line: #d9e7df;
  --shadow: 0 18px 50px rgba(10, 75, 51, 0.13);
  --radius: 24px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #e1f6ed 0, transparent 34rem), var(--bg);
  line-height: 1.65;
}

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

img {
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 251, 248, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(217, 231, 223, 0.9);
}

.navbar {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand img {
  width: 44px;
  height: 44px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}

.nav-links a:hover {
  color: var(--green);
}

.nav-cta {
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--green);
  color: #fff !important;
  box-shadow: 0 10px 24px rgba(11, 122, 83, 0.25);
}

.menu-toggle {
  display: none;
  border: 0;
  background: var(--surface);
  border-radius: 12px;
  font-size: 24px;
  padding: 8px 12px;
  color: var(--green-dark);
}

.section-pad {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 86px 0;
}

.hero {
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(330px, 0.75fr);
  align-items: center;
  gap: 52px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 5vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

h1 span {
  color: var(--green-dark);
}

.hero-subtitle {
  max-width: 780px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--green), #18a06f);
  box-shadow: 0 16px 34px rgba(11, 122, 83, 0.25);
}

.btn-secondary {
  color: var(--green-dark);
  background: #fff;
  border: 1px solid var(--line);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 740px;
}

.metrics div {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.metrics strong {
  display: block;
  font-size: 21px;
  color: var(--green-dark);
}

.metrics span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

.hero-panel {
  position: relative;
  padding: 34px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff, #f0faf5);
  box-shadow: var(--shadow);
  border: 1px solid rgba(217, 231, 223, 0.9);
  overflow: hidden;
}

.hero-panel::before {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(21, 160, 112, 0.16);
}

.panel-tag {
  display: inline-block;
  margin-bottom: 18px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 800;
}

.hero-panel h2 {
  font-size: 28px;
  margin-bottom: 18px;
}

.hero-panel ul,
.service-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.hero-panel li,
.service-card li {
  margin: 10px 0;
}

.strip {
  width: min(var(--max), calc(100% - 40px));
  margin: -30px auto 0;
  padding: 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  border-radius: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 12px 34px rgba(10, 75, 51, 0.08);
}

.strip span {
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-weight: 700;
  font-size: 14px;
}

.section-title {
  max-width: 760px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-title.left {
  margin-left: 0;
  text-align: left;
}

.section-title h2,
.contact-copy h2,
.statement-card h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section-title p,
.contact-copy p,
.statement-card p {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 22px;
}

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

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

.card,
.scenario-card,
.method-item,
.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 14px 42px rgba(10, 75, 51, 0.08);
}

.service-card {
  position: relative;
  padding: 30px;
  overflow: hidden;
}

.card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  margin-bottom: 20px;
  border-radius: 17px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-weight: 900;
}

.service-card h3,
.scenario-card h3,
.method-item h3,
.timeline-item h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.service-card p,
.scenario-card p,
.method-item p,
.timeline-item p {
  color: var(--muted);
}

.soft-bg {
  width: 100%;
  max-width: none;
  padding-left: max(20px, calc((100% - var(--max)) / 2));
  padding-right: max(20px, calc((100% - var(--max)) / 2));
  background: linear-gradient(135deg, #eaf7f0, #f6fbf8);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.method-item {
  padding: 28px;
}

.scenario-card {
  padding: 26px;
}

.workflow {
  padding-top: 70px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.timeline-item {
  position: relative;
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.timeline-item span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 20px;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-weight: 900;
}

.statement {
  padding-top: 40px;
}

.statement-card {
  padding: 38px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--green-dark), #0f6b86);
  color: #fff;
  box-shadow: var(--shadow);
}

.statement-card .eyebrow,
.statement-card p {
  color: rgba(255,255,255,0.84);
}

.contact-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 34px;
  align-items: start;
}

.contact-card {
  padding: 30px;
}

.contact-card p {
  margin-bottom: 12px;
  color: var(--muted);
}

.contact-card strong {
  color: var(--ink);
}

.footer {
  padding: 28px max(20px, calc((100% - var(--max)) / 2));
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer p {
  margin: 0;
}

.footer a {
  color: var(--green-dark);
  font-weight: 800;
}

@media (max-width: 980px) {
  .hero,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .cards-3,
  .cards-4,
  .timeline,
  .method-grid,
  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .nav-links {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 76px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .menu-toggle {
    display: inline-flex;
  }
}

@media (max-width: 640px) {
  .navbar,
  .section-pad,
  .strip {
    width: min(100% - 28px, var(--max));
  }

  .brand span {
    font-size: 14px;
  }

  .hero {
    min-height: auto;
    padding-top: 58px;
  }

  .cards-3,
  .cards-4,
  .timeline,
  .method-grid,
  .metrics {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .service-card,
  .statement-card,
  .contact-card {
    padding: 24px;
  }

  .footer {
    flex-direction: column;
  }
}