/* Keep the existing article structure and screenshots while matching the neutral storefront. */
:root {
  --cream: #f7f8fa;
  --paper: #fff;
  --ink: #1d1d1f;
  --muted: #737780;
  --line: #eceef2;
  --orange: #386de8;
  --orange-dark: #386de8;
  --purple: #386de8;
  --font: -apple-system, BlinkMacSystemFont, "Helvetica Neue", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
}

html, body { background: #f7f8fa; }
body { color: #1d1d1f; }
::selection { background: #dce6fc; color: #1d1d1f; }
.orange-text { color: inherit; }
.tutorial-shell { width: min(880px, calc(100% - 40px)); }
.site-header { background: #f7f8faf2; }
.tutorial-nav { height: 100px; width: min(1120px, calc(100% - 40px)); border-color: #eceef2; }
.brand { gap: 8px; color: #1d1d1f; font-size: 28px; font-weight: 750; letter-spacing: -1px; }
.brand .brand-dot { color: inherit; }
.brand img { width: 28px; height: 28px; transform: none; }
.tutorial-back { color: #737780; font-size: 13px; }
.tutorial-back:hover { color: #386de8; }

/* One reading surface gives long instructions a steady rhythm on both screen sizes. */
#tutorial-main { margin-top: 32px; margin-bottom: 48px; }
#tutorial-main > article { padding: 32px; background: #fff; border: 1px solid #eceef2; border-radius: 28px; }
.tutorial-hero { display: block; padding: 12px 0 30px; }
.tutorial-mascot { display: none; }
.section-kicker { color: #737780; font-size: 11px; letter-spacing: 1.2px; }
.tutorial-title { color: #1d1d1f; font-size: 38px; line-height: 1.45; letter-spacing: -1.2px; font-weight: 700; }
.tutorial-deck { max-width: 650px; font-size: 15px; line-height: 1.9; color: #737780; margin-top: 18px; }
.tutorial-date { color: #737780; font-size: 11px; margin-top: 16px; }
.tutorial-route { padding: 22px 24px; border-color: #eceef2; border-radius: 18px; background: #f7f8fa; }
.tutorial-route span { font-size: 13px; font-weight: 600; }
.tutorial-route b { color: #386de8; }
.tutorial-route i { color: #a3a7af; }
.tutorial-intro { font-size: 14px; line-height: 1.9; color: #737780; }
.tutorial-toc { background: #f5f7fc; border-color: #e6ebf5; border-radius: 20px; padding: 26px; margin-top: 28px; }
.tutorial-toc > p { color: #1d1d1f; font-size: 14px; }
.tutorial-toc a { color: #386de8; font-size: 13px; }
.tutorial-section { border-color: #eceef2; padding: 36px 0; scroll-margin-top: 120px; }
.tutorial-section h2 { color: #1d1d1f; font-size: 25px; line-height: 1.6; letter-spacing: -.6px; margin-bottom: 18px; }
.tutorial-section p, .tutorial-section li, .tutorial-section dd { color: #535862; font-size: 14px; line-height: 1.9; }
.tutorial-section a, .tutorial-source a { color: #386de8; }
.tutorial-tip { border-left-color: #386de8; background: #f7f8fa; border-radius: 0 16px 16px 0; }
.tutorial-tip strong { color: #1d1d1f; }
.tutorial-faq dt { color: #1d1d1f; font-size: 15px; }
.tutorial-security { background: #f7f8fa; border-color: #eceef2; border-radius: 20px; }
.tutorial-security h3 { color: #1d1d1f; font-size: 17px; }
.tutorial-figure > a { border-color: #eceef2; border-radius: 14px; background: #fff; }
.tutorial-figure img { width: 100%; height: auto; object-fit: contain; }
.tutorial-figure figcaption { color: #737780; font-size: 11px; }
.tutorial-checklist li::marker { color: #386de8; }
.tutorial-contact { padding: 28px; border: 1px solid #eceef2; border-radius: 22px; background: #f7f8fa; scroll-margin-top: 120px; }
.tutorial-contact h2 { font-size: 25px; letter-spacing: -.6px; line-height: 1.6; }
.tutorial-contact .wechat-contact input { border-color: #e2e5eb; background: #fff; color: #1d1d1f; font-size: 18px; }
.tutorial-contact .button-dark { background: #292c33; color: #fff; font-size: 13px; min-height: 48px; padding: 14px 20px; gap: 16px; }
.tutorial-contact .button:hover { transform: translateY(-1px); box-shadow: 0 3px 10px #1d1d1f0d; }
.tutorial-contact .copy-status, .tutorial-source { color: #737780; font-size: 11px; }
.tutorial-source { margin-bottom: 8px; }

.tutorial-library { padding-top: 32px; padding-bottom: 64px; }
.tutorial-library .tutorial-hero { padding: 28px 0 30px; }
.tutorial-catalog { margin-top: 16px; }
.tutorial-card { grid-template-columns: 88px 1fr; gap: 28px; padding: 32px; background: #fff; border: 1px solid #eceef2; border-radius: 28px; }
.tutorial-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px #1d1d1f06; }
.tutorial-card-icon { width: 88px; height: 100px; border-radius: 22px; background: #f0f3fb; color: #386de8; font-size: 44px; }
.tutorial-card-tag { color: #737780; font-size: 11px; letter-spacing: .2px; }
.tutorial-card h2 { color: #1d1d1f; font-size: 23px; line-height: 1.6; letter-spacing: -.5px; }
.tutorial-card-summary { font-size: 14px; color: #737780; }
.tutorial-card-meta { color: #737780; font-size: 11px; }
.tutorial-card-cta, .tutorial-library-contact a { color: #386de8; }
.tutorial-library-contact { margin-top: 24px; color: #737780; }
.tutorial-library-contact strong { color: #535862; }
.site-footer { border-color: #eceef2; padding-block: 30px 36px; }
.footer-brand { color: #1d1d1f; font-size: 25px; font-weight: 750; letter-spacing: -1px; }
.footer-brand span { color: #737780; font-size: 14px; }
.site-footer p { color: #737780; font-size: 11px; line-height: 1.9; }
.footer-right > a { color: #737780; font-size: 12px; }
.footer-right > a:hover { color: #386de8; }

@media (max-width: 600px) {
  .tutorial-nav { height: 76px; }
  .brand { font-size: 25px; }
  .brand img { width: 28px; height: 28px; }
  .tutorial-back { font-size: 12px; }
  #tutorial-main { margin-top: 20px; margin-bottom: 32px; }
  #tutorial-main > article { padding: 22px 18px; border-radius: 24px; }
  .tutorial-hero { padding-top: 4px; padding-bottom: 24px; }
  .tutorial-title { font-size: 29px; line-height: 1.5; letter-spacing: -.9px; }
  .tutorial-deck { font-size: 14px; line-height: 1.9; }
  .tutorial-route { padding: 18px 12px; gap: 7px; border-radius: 16px; }
  .tutorial-route span { font-size: 11px; gap: 5px; }
  .tutorial-toc { padding: 22px 18px; }
  .tutorial-section { padding: 30px 0; }
  .tutorial-section h2 { font-size: 22px; letter-spacing: -.5px; }
  .tutorial-section p, .tutorial-section li, .tutorial-section dd { font-size: 14px; }
  .tutorial-section ol, .tutorial-section ul { padding-left: 20px; }
  .tutorial-tip, .tutorial-security { padding: 18px; }
  .tutorial-contact { padding: 22px 18px; }
  .tutorial-contact h2 { font-size: 22px; }
  .tutorial-contact .wechat-contact input { width: 100%; }
  .tutorial-library { padding-top: 20px; padding-bottom: 36px; }
  .tutorial-library .tutorial-hero { padding: 20px 0 24px; }
  .tutorial-card { grid-template-columns: 1fr; gap: 18px; padding: 26px; border-radius: 24px; }
  .tutorial-card-icon { width: 52px; height: 52px; border-radius: 15px; font-size: 30px; }
  .tutorial-card h2 { font-size: 21px; }
  .tutorial-card-summary { font-size: 13px; }
  .tutorial-card-meta { gap: 12px; }
  .site-footer { flex-wrap: wrap; gap: 20px; }
  .site-footer p, .footer-right p { font-size: 10px; }
  .footer-right > a { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-card, .tutorial-contact .button { transition: none; }
  .tutorial-card:hover, .tutorial-contact .button:hover { transform: none; }
}