:root {
  --color-primary: #1a7f5a;
  --color-primary-dark: #145f44;
  --color-primary-light: #e8f5ef;
  --color-accent: #c9a227;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f7faf8;
  --color-border: #e5ebe8;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 127, 90, 0.1);
  --radius: 12px;
  --max-width: 1120px;
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(100% - 32px, var(--max-width));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  width: min(100% - 32px, var(--max-width));
  margin-inline: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  font-size: 20px;
  font-weight: 700;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.logo-text strong {
  font-size: 17px;
  color: var(--color-text);
}

.logo-text small {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 400;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border: none;
  background: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
}

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--color-primary-light) 0%, #fff 55%);
  padding: 80px 0 96px;
}

.hero-inner {
  width: min(100% - 32px, var(--max-width));
  margin-inline: auto;
  max-width: 760px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 20px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.hero h1 {
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.35;
  color: var(--color-text);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 17px;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

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

.btn-outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* Sections */
.section {
  padding: 72px 0;
}

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

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.section-head h2 {
  font-size: clamp(24px, 3vw, 32px);
  color: var(--color-text);
}

.section-intro {
  max-width: 640px;
  margin: 16px auto 0;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 28px;
  align-items: start;
}

.about-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.section-alt .about-card {
  background: #fff;
}

.about-main p + p {
  margin-top: 16px;
}

.about-facts h3 {
  font-size: 18px;
  margin-bottom: 20px;
  color: var(--color-primary-dark);
}

.about-facts dl div {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

.about-facts dl div:last-child {
  border-bottom: none;
}

.about-facts dt {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.about-facts dd {
  font-size: 15px;
  font-weight: 500;
}

/* Scope */
.scope-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.scope-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: box-shadow 0.2s;
}

.scope-card:hover {
  box-shadow: var(--shadow-md);
}

.scope-card h3 {
  font-size: 17px;
  color: var(--color-primary-dark);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary-light);
}

.scope-card ul {
  list-style: none;
}

.scope-card li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.scope-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.scope-note {
  color: #b45309 !important;
  font-size: 13px !important;
}

.scope-disclaimer {
  margin-top: 32px;
  padding: 16px 20px;
  background: var(--color-primary-light);
  border-radius: 8px;
  font-size: 14px;
  color: var(--color-text-muted);
  text-align: center;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-item {
  text-align: center;
  padding: 28px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.feature-item h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.feature-item p {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.contact-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.contact-card h3 {
  font-size: 17px;
  color: var(--color-primary-dark);
  margin-bottom: 14px;
}

.contact-card p {
  font-size: 15px;
  color: var(--color-text-muted);
}

.contact-card a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-card a:hover {
  text-decoration: underline;
}

/* Footer */
.site-footer {
  background: #1a2e26;
  color: #cbd5d0;
  padding: 40px 0 32px;
  font-size: 14px;
}

.footer-inner {
  text-align: center;
}

.footer-site {
  font-size: 18px;
  font-weight: 600;
  color: #e8f5ef;
  letter-spacing: 0.04em;
}

.footer-company {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.footer-address {
  margin-bottom: 16px;
}

.footer-icp a {
  color: #8fd4b4;
}

.footer-beian {
    width: auto;
  height: 16px; /* 图标高度，可自行调整 */
  vertical-align: middle;
  display: inline-block;
}
.footer-note {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: #7a8f86;
}

.footer-copy {
  margin-top: 20px;
  font-size: 13px;
  color: #7a8f86;
}

/* Mobile */
@media (max-width: 900px) {
  .about-grid,
  .feature-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 12px 16px 20px;
    box-shadow: var(--shadow-md);
  }

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

  .nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 56px 0 64px;
  }

  .section {
    padding: 48px 0;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .logo-text small {
    display: none;
  }
  .footer-icp {
  text-align: center;
  font-size: 14px;
  color: #666;
  margin: 10px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}
.footer-icp img {
  width: auto;
  height: 16px;
  vertical-align: middle;
}
.footer-icp a {
  color: #666;
  text-decoration: none;
}
.footer-icp a:hover {
  color: #333;
  text-decoration: underline;
}
}