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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1d1d1f;
  background: #fff;
  -webkit-font-smoothing: antialiased;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

a {
  color: #0066cc;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* Header */
.page-header {
  text-align: center;
  padding: 40px 24px 32px;
}
.logo {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  background: url('/assets/logo.svg') no-repeat center;
  background-size: contain;
}
.page-header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}
.page-header p {
  font-size: 15px;
  color: #86868b;
}

/* Main */
.main-content {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

.intro {
  font-size: 15px;
  color: #86868b;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid #f0f0f0;
}

section {
  margin-bottom: 32px;
}

h2 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #1d1d1f;
}

.tip {
  font-size: 15px;
  color: #1d1d1f;
  background: #f5f5f7;
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 12px;
}
.tip strong {
  color: #d93025;
}

ul {
  list-style: none;
  padding: 0;
}
li {
  font-size: 15px;
  padding: 6px 0;
  color: #424245;
}
li a {
  word-break: break-all;
}

section p {
  font-size: 15px;
  color: #424245;
  margin-bottom: 16px;
  line-height: 1.7;
}
section p strong {
  color: #1d1d1f;
}

.detail {
  margin-top: 16px;
}
.detail p {
  font-size: 14px;
  color: #1d1d1f;
  font-weight: 600;
  margin-bottom: 8px;
  margin-top: 16px;
}
.detail p:first-child {
  margin-top: 0;
}
.detail ul {
  margin-bottom: 12px;
}
.detail li {
  font-size: 14px;
  padding: 4px 0;
  color: #424245;
  line-height: 1.6;
}
.detail li strong {
  color: #1d1d1f;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 24px;
  font-size: 13px;
  color: #86868b;
  border-top: 1px solid #f0f0f0;
}
.sep {
  margin: 0 6px;
}

/* Mobile */
@media (max-width: 480px) {
  .page-header {
    padding: 28px 20px 20px;
  }
  .logo {
    width: 56px;
    height: 56px;
    margin: 0 auto 12px;
  }
  .page-header h1 {
    font-size: 24px;
  }
  .page-header p {
    font-size: 14px;
  }
  .main-content {
    padding: 0 20px 32px;
  }
  .intro {
    font-size: 14px;
    margin-bottom: 24px;
    padding-bottom: 20px;
  }
  h2 {
    font-size: 17px;
    margin-bottom: 10px;
  }
  .tip {
    font-size: 14px;
    padding: 10px 14px;
  }
  li {
    font-size: 14px;
    padding: 5px 0;
  }
  section p {
    font-size: 14px;
    margin-bottom: 14px;
  }
  section {
    margin-bottom: 24px;
  }
  .detail p {
    font-size: 13px;
  }
  .detail li {
    font-size: 13px;
  }
  .site-footer {
    padding: 20px;
    font-size: 12px;
  }
}