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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #333;
  background: #f8f9fa;
}

.site-header {
  background: linear-gradient(135deg, #4CAF50 0%, #388E3C 100%);
  color: #fff;
  padding: 1.5rem 1rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
}

.logo-img {
  display: block;
  width: 72px;
  height: 72px;
  margin: 0 auto 0.5rem;
  border-radius: 12px;
  object-fit: contain;
  background: rgba(255,255,255,0.15);
}

.logo {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.tagline {
  font-size: 0.95rem;
  opacity: 0.95;
  margin-top: 0.25rem;
}

.nav {
  margin-top: 1.25rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.nav a {
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  transition: background 0.2s;
}

.nav a:hover {
  background: rgba(255,255,255,0.2);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

.hero {
  padding: 2.5rem 0;
  text-align: center;
}

.hero-inner h2 {
  font-size: 1.5rem;
  color: #222;
  margin-bottom: 1rem;
}

.hero-inner p {
  color: #555;
  font-size: 1rem;
}

.hero-qrcode {
  margin-top: 2rem;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  background: rgba(255,255,255,0.95);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.hero-qrcode img {
  display: block;
  width: 160px;
  height: 160px;
  object-fit: contain;
  border-radius: 8px;
}

.hero-qrcode-hint {
  font-size: 0.85rem;
  color: #666;
}

.section {
  padding: 2rem 0;
}

.section-inner h2 {
  font-size: 1.35rem;
  color: #2e7d32;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #4CAF50;
}

.section-inner p {
  margin-bottom: 1rem;
  color: #444;
}

.section-alt {
  background: #fff;
  margin: 0 -1rem;
  padding: 2rem 1rem;
  border-radius: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

@media (min-width: 640px) {
  .section-alt {
    margin-left: calc(-50vw + 360px);
    margin-right: calc(-50vw + 360px);
    padding-left: calc(50vw - 360px + 1rem);
    padding-right: calc(50vw - 360px + 1rem);
    border-radius: 12px;
  }
}

.feature-list {
  list-style: none;
  margin-top: 1rem;
}

.feature-list li {
  padding: 0.5rem 0;
  padding-left: 1.25rem;
  position: relative;
  color: #444;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #4CAF50;
  font-weight: bold;
}

.guide-block {
  margin-bottom: 2rem;
}

.guide-block h3 {
  font-size: 1.1rem;
  color: #333;
  margin-bottom: 0.75rem;
}

.guide-steps {
  margin-left: 1.25rem;
  margin-bottom: 0.5rem;
}

.guide-steps li {
  margin-bottom: 0.6rem;
  color: #444;
}

.faq-list {
  margin-top: 0.5rem;
}

.faq-list dt {
  font-weight: 600;
  color: #333;
  margin-top: 1rem;
  margin-bottom: 0.35rem;
}

.faq-list dd {
  margin-left: 0;
  color: #555;
  margin-bottom: 0.5rem;
}

.cta-block {
  text-align: center;
}

.cta-block p {
  margin-bottom: 1.5rem;
}

.qrcode-wrap {
  margin: 0 auto;
  padding: 12px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  display: inline-block;
}

.qrcode-img {
  display: block;
  width: 200px;
  height: 200px;
  object-fit: contain;
  border-radius: 8px;
}

.site-footer {
  text-align: center;
  padding: 1.5rem 1rem;
  color: #666;
  font-size: 0.9rem;
  border-top: 1px solid #eee;
  background: #fff;
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
}

.footer-beian {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: #999;
}

.footer-beian a {
  color: #999;
  text-decoration: none;
}

.footer-beian a:hover {
  color: #666;
  text-decoration: underline;
}