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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f7f8fa;
}

a {
  color: #2a74ed;
  word-break: break-all;
}

a:hover {
  color: #1d5bbf;
}

.page {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  padding: 28px 20px;
}

@media (min-width: 768px) {
  .page {
    padding: 40px 24px 64px;
  }

  .card {
    padding: 40px 48px;
  }
}

.page-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid #eceff3;
}

.page-title {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 700;
  color: #111827;
}

.meta {
  margin: 4px 0 0;
  font-size: 13px;
  color: #6b7280;
}

.info-section {
  margin-bottom: 32px;
}

.info-section:last-child {
  margin-bottom: 0;
}

.subsection-title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
  color: #111827;
}

.section-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #374151;
}

.section-text + .section-text {
  margin-top: 12px;
}

.feature-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.feature-list li {
  position: relative;
  margin-bottom: 8px;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.85;
  color: #374151;
}

.feature-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #2a74ed;
  font-weight: 700;
}

.feature-list li:last-child {
  margin-bottom: 0;
}

.sdk-item {
  margin-top: 16px;
  padding: 16px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #f9fafb;
}

.sdk-name {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  color: #111827;
}

.sdk-detail-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sdk-detail-list li {
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.85;
  color: #374151;
  word-break: break-word;
}

.sdk-detail-list li:last-child {
  margin-bottom: 0;
}

.sdk-detail-list strong {
  color: #111827;
  font-weight: 600;
}

.page-footer {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid #eceff3;
  font-size: 13px;
  color: #6b7280;
  text-align: center;
}