:root {
  --tutorial-paper: #f5f0e7;
  --tutorial-paper-deep: #ebe2d4;
  --tutorial-ink: #17130f;
  --tutorial-muted: #6c6157;
  --tutorial-rule: #cfc3b3;
  --tutorial-spark: #cf431e;
}

.home-tutorial-link { appearance: none; transition: color 180ms ease; }
.home-tutorial-link:hover, .home-tutorial-link:focus-visible { color: var(--tutorial-spark); }
.home-tutorial-entry { display: none; border-top: 1px solid var(--tutorial-ink); border-bottom: 1px solid var(--tutorial-rule); padding: 26px 0 24px; gap: 14px; }
.home-tutorial-entry h2 { margin: 0 0 8px; font: 400 1.75rem/1.25 Georgia, "Songti SC", STSong, SimSun, serif; }
.home-tutorial-entry p { margin: 0; color: var(--tutorial-muted); line-height: 1.7; }

.tutorial-choice-dialog { padding: 0; border: 1px solid var(--tutorial-ink); background: var(--tutorial-paper); color: var(--tutorial-ink); }
.tutorial-choice-dialog::backdrop { background: rgb(23 19 15 / .7); }
.tutorial-choice-dialog .dialog-close { position: absolute; z-index: 5; border: 0; background: transparent; color: inherit; cursor: pointer; }
.tutorial-choice-dialog--desktop { width: min(920px, calc(100vw - 48px)); max-height: calc(100dvh - 48px); }
.tutorial-desktop-prompt { position: relative; display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); min-height: 510px; }
.tutorial-desktop-prompt > .dialog-close { top: 18px; right: 20px; width: 42px; height: 42px; font-size: 2rem; }
.tutorial-desktop-locator { position: relative; margin: 0; min-width: 0; border-right: 1px solid var(--tutorial-ink); background: var(--tutorial-paper-deep); overflow: hidden; }
.tutorial-desktop-locator img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: 68% center; }
.tutorial-desktop-locator figcaption { position: absolute; inset: auto 20px 18px; padding: 11px 13px; background: var(--tutorial-ink); color: var(--tutorial-paper); font-size: .82rem; line-height: 1.5; }
.tutorial-locator-arrow { position: absolute; top: 42px; right: 18px; display: grid; gap: 3px; color: var(--tutorial-spark); font-weight: 900; text-align: right; }
.tutorial-locator-arrow span { font-size: 2.4rem; line-height: .7; }
.tutorial-desktop-choice { padding: 52px 52px 36px; }
.tutorial-desktop-choice h2 { margin: 10px 0 14px; max-width: 11ch; font: 400 2.65rem/1.08 Georgia, "Songti SC", STSong, SimSun, serif; letter-spacing: -.025em; }
.tutorial-prompt-intro { margin: 0 0 20px; color: var(--tutorial-muted); line-height: 1.7; }
.tutorial-route { display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; padding: 18px 0; border-top: 1px solid var(--tutorial-rule); color: inherit; text-decoration: none; }
.tutorial-route:last-of-type { border-bottom: 1px solid var(--tutorial-rule); }
.tutorial-route strong { font: 400 1.4rem/1.25 Georgia, "Songti SC", STSong, SimSun, serif; }
.tutorial-route span { grid-column: 1 / -1; color: var(--tutorial-muted); line-height: 1.55; }
.tutorial-route em { grid-column: 2; grid-row: 1; align-self: center; color: var(--tutorial-spark); font-style: normal; font-weight: 800; transition: transform 180ms ease; }
.tutorial-route:hover em, .tutorial-route:focus-visible em { transform: translateX(4px); }
.tutorial-choice-later { margin-top: 20px; }
.tutorial-choice-dialog--mobile { display: none; }

.tutorial-body { background: var(--tutorial-paper); color: var(--tutorial-ink); }
.tutorial-body .site-footer { margin-top: 0; }
.tutorial-landing, .tutorial-guide { width: min(1440px, calc(100% - 64px)); margin: 0 auto; }
.tutorial-landing { padding: clamp(56px, 8vw, 112px) 0 80px; }
.tutorial-landing-hero { max-width: 850px; margin-bottom: clamp(48px, 7vw, 88px); }
.tutorial-landing-hero h1 { max-width: 12ch; margin: 12px 0 24px; font: 400 clamp(3rem, 6.2vw, 6rem)/.98 Georgia, "Songti SC", STSong, SimSun, serif; letter-spacing: -.035em; text-wrap: balance; }
.tutorial-landing-hero > p:last-child { max-width: 62ch; color: var(--tutorial-muted); font-size: 1.08rem; line-height: 1.8; }
.tutorial-landing-paths { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--tutorial-ink); }
.tutorial-landing-paths a { min-height: 390px; display: flex; flex-direction: column; padding: clamp(30px, 4vw, 58px); color: inherit; text-decoration: none; }
.tutorial-landing-paths a + a { border-left: 1px solid var(--tutorial-ink); }
.tutorial-landing-paths span { color: var(--tutorial-spark); font-weight: 800; }
.tutorial-landing-paths strong { margin: 28px 0 18px; font: 400 clamp(2.1rem, 3.6vw, 4rem)/1.08 Georgia, "Songti SC", STSong, SimSun, serif; }
.tutorial-landing-paths p { max-width: 42ch; color: var(--tutorial-muted); line-height: 1.75; }
.tutorial-landing-paths em { margin-top: auto; padding-top: 32px; border-top: 1px solid var(--tutorial-rule); font-style: normal; font-weight: 800; }
.tutorial-landing-paths a:hover em, .tutorial-landing-paths a:focus-visible em { color: var(--tutorial-spark); }
.tutorial-public-note { margin-top: 20px; color: var(--tutorial-muted); }

.tutorial-device-switch { width: min(1440px, calc(100% - 64px)); margin: 28px auto 0; display: flex; justify-content: flex-end; align-items: center; gap: 8px; }
.tutorial-device-switch > span { margin-right: 8px; color: var(--tutorial-muted); font-size: .82rem; letter-spacing: .08em; }
.tutorial-device-switch button { min-height: 42px; padding: 0 16px; border: 1px solid var(--tutorial-rule); background: transparent; color: inherit; font-weight: 800; cursor: pointer; }
.tutorial-device-switch button.is-current { border-color: var(--tutorial-ink); background: var(--tutorial-ink); color: var(--tutorial-paper); }
.tutorial-device-switch button:focus-visible { outline: 2px solid var(--tutorial-spark); outline-offset: 3px; }

body[data-active-tutorial-surface="desktop"] .tutorial-guide--desktop { display: block; }
body[data-active-tutorial-surface="desktop"] .tutorial-guide--mobile { display: none; }
body[data-active-tutorial-surface="mobile"] .tutorial-guide--desktop { display: none; }
body[data-active-tutorial-surface="mobile"] .tutorial-guide--mobile { display: block; }

.tutorial-guide { padding: 38px 0 84px; }
.tutorial-guide--mobile { display: none; }
.tutorial-guide-header { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 38px; align-items: start; padding-bottom: 30px; border-bottom: 1px solid var(--tutorial-ink); }
.tutorial-back { color: inherit; text-decoration: none; font-weight: 800; }
.tutorial-guide-header h1 { margin: 8px 0 12px; font: 400 clamp(2.7rem, 5vw, 4.8rem)/1 Georgia, "Songti SC", STSong, SimSun, serif; letter-spacing: -.03em; }
.tutorial-guide-header p { max-width: 66ch; margin: 0; color: var(--tutorial-muted); line-height: 1.7; }
.tutorial-progress { height: 3px; background: #dfd5c7; }
.tutorial-progress span { display: block; width: 100%; height: 100%; background: var(--tutorial-spark); transform: scaleX(0); transform-origin: left center; transition: transform 320ms cubic-bezier(.22, 1, .36, 1); }
.tutorial-guide-layout--desktop { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 34px; padding-top: 34px; }
.tutorial-step-nav { display: flex; flex-direction: column; align-self: start; position: sticky; top: 22px; border-top: 1px solid var(--tutorial-rule); }
.tutorial-step-nav button { display: grid; grid-template-columns: 38px 1fr; gap: 8px; text-align: left; padding: 15px 3px; border: 0; border-bottom: 1px solid var(--tutorial-rule); background: none; color: var(--tutorial-muted); cursor: pointer; line-height: 1.4; }
.tutorial-step-nav button span { color: var(--tutorial-spark); font-family: Georgia, serif; }
.tutorial-step-nav button.is-current { color: var(--tutorial-ink); font-weight: 800; }
.tutorial-step[hidden] { display: none !important; }
.tutorial-step--desktop { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .75fr); gap: clamp(28px, 3.5vw, 54px); align-items: start; }
.tutorial-step-copy { position: sticky; top: 22px; }
.tutorial-step-count { color: var(--tutorial-spark); font-weight: 900; letter-spacing: .08em; }
.tutorial-step-copy h2, .tutorial-step--mobile h2 { margin: 10px 0 16px; font: 400 clamp(2rem, 2.7vw, 3rem)/1.08 Georgia, "Songti SC", STSong, SimSun, serif; }
.tutorial-step-copy > p:not(.tutorial-step-count), .tutorial-step--mobile header > p:last-child { color: var(--tutorial-muted); line-height: 1.75; }
.tutorial-shot { position: relative; margin: 0; min-width: 0; }
.tutorial-shot img { display: block; width: 100%; height: auto; border: 1px solid var(--tutorial-ink); background: var(--tutorial-paper-deep); }
.tutorial-shot figcaption { padding: 9px 0; color: var(--tutorial-muted); font-size: .82rem; }
.tutorial-marker { position: absolute; top: var(--marker-y); left: var(--marker-x); z-index: 3; display: flex; align-items: center; gap: 2px; color: var(--tutorial-spark); font-weight: 900; transform: translate(-50%, -50%); filter: drop-shadow(0 1px 0 var(--tutorial-paper)); }
.tutorial-marker b { display: grid; place-items: center; width: 30px; height: 30px; border: 2px solid currentColor; border-radius: 50%; background: var(--tutorial-paper); }
.tutorial-marker i { font-size: 2rem; font-style: normal; line-height: 1; }
.tutorial-marker--left { flex-direction: row-reverse; }
.tutorial-marker--up { flex-direction: column-reverse; }
.tutorial-marker--down { flex-direction: column; }
.tutorial-action-list { margin-top: 24px; border-top: 1px solid var(--tutorial-rule); }
.tutorial-action-list article { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 11px; padding: 13px 0; border-bottom: 1px solid var(--tutorial-rule); }
.tutorial-action-list article > span { display: grid; place-items: center; width: 24px; height: 24px; border: 1px solid var(--tutorial-spark); border-radius: 50%; color: var(--tutorial-spark); font: 700 .75rem Georgia, serif; }
.tutorial-action-list strong { font-size: .96rem; }
.tutorial-action-list p { margin: 4px 0; color: var(--tutorial-muted); font-size: .88rem; line-height: 1.5; }
.tutorial-action-list small { color: var(--tutorial-ink); line-height: 1.45; }
.tutorial-step-controls { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--tutorial-ink); }
.tutorial-step-controls button { min-height: 44px; border: 0; background: none; color: inherit; font-weight: 900; cursor: pointer; }
.tutorial-step-controls button:last-child { justify-self: end; }
.tutorial-step-controls button:disabled { opacity: .35; cursor: default; }

@media (max-width: 900px) {
  .home-tutorial-link { display: none; }
  .home-tutorial-entry { display: grid; margin-top: 32px; }
  .tutorial-choice-dialog--desktop { display: none !important; }
  .tutorial-choice-dialog--mobile[open] { display: block; }
  .tutorial-choice-dialog--mobile { width: 100%; max-width: none; max-height: 92dvh; margin: auto 0 0; border-width: 1px 0 0; border-radius: 18px 18px 0 0; overflow: auto; }
  .tutorial-mobile-prompt { padding: 26px 20px max(24px, env(safe-area-inset-bottom)); }
  .tutorial-mobile-prompt header { position: relative; padding-right: 40px; }
  .tutorial-mobile-prompt .dialog-close { top: -8px; right: -8px; width: 44px; height: 44px; font-size: 1.8rem; }
  .tutorial-mobile-prompt h2 { margin: 8px 0 10px; font: 400 2rem/1.08 Georgia, "Songti SC", STSong, SimSun, serif; }
  .tutorial-mobile-prompt header > p:last-child { margin: 0; color: var(--tutorial-muted); line-height: 1.6; }
  .tutorial-mobile-locator { position: relative; height: min(38vh, 320px); margin: 20px 0 10px; border: 1px solid var(--tutorial-rule); overflow: hidden; background: var(--tutorial-paper-deep); }
  .tutorial-mobile-locator img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center bottom; }
  .tutorial-mobile-locator span { position: absolute; right: 10px; top: 48%; padding: 7px 9px; background: var(--tutorial-spark); color: white; font-weight: 900; }
  .tutorial-mobile-routes { border-top: 1px solid var(--tutorial-ink); }
  .tutorial-mobile-routes a { display: grid; grid-template-columns: 1fr auto; gap: 5px 12px; padding: 15px 0; border-bottom: 1px solid var(--tutorial-rule); color: inherit; text-decoration: none; }
  .tutorial-mobile-routes strong { font-size: 1.15rem; }
  .tutorial-mobile-routes span { grid-column: 1; color: var(--tutorial-muted); font-size: .88rem; line-height: 1.5; }
  .tutorial-mobile-routes em { grid-column: 2; grid-row: 1 / span 2; align-self: center; color: var(--tutorial-spark); font-style: normal; font-weight: 900; }
  .tutorial-choice-later { width: 100%; min-height: 48px; margin-top: 12px; }

  .tutorial-landing, .tutorial-guide { width: min(100% - 32px, 680px); }
  .tutorial-device-switch { width: min(100% - 32px, 680px); margin-top: 18px; justify-content: stretch; }
  .tutorial-device-switch > span { display: none; }
  .tutorial-device-switch button { flex: 1; min-height: 46px; padding-inline: 8px; }
  .tutorial-landing { padding: 44px 0 76px; }
  .tutorial-landing-hero { margin-bottom: 36px; }
  .tutorial-landing-hero h1 { max-width: 10ch; font-size: clamp(2.7rem, 14vw, 4.3rem); }
  .tutorial-landing-paths { grid-template-columns: 1fr; }
  .tutorial-landing-paths a { min-height: 290px; padding: 26px 22px; }
  .tutorial-landing-paths a + a { border-left: 0; border-top: 1px solid var(--tutorial-ink); }
  .tutorial-landing-paths strong { font-size: 2rem; }
  .tutorial-guide--desktop { display: none; }
  .tutorial-guide--mobile { display: block; padding: 24px 0 92px; }
  .tutorial-mobile-guide-header { padding-bottom: 22px; }
  .tutorial-mobile-guide-header .section-kicker { margin-top: 22px; }
  .tutorial-mobile-guide-header h1 { margin: 6px 0 10px; font: 400 3rem/1 Georgia, "Songti SC", STSong, SimSun, serif; }
  .tutorial-mobile-guide-header > p:last-child { margin: 0; color: var(--tutorial-muted); line-height: 1.65; }
  .tutorial-step-nav--mobile { position: static; flex-direction: row; gap: 8px; overflow-x: auto; padding: 18px 0 8px; border: 0; scroll-snap-type: x mandatory; }
  .tutorial-step-nav--mobile button { flex: 0 0 66%; min-height: 58px; display: grid; grid-template-columns: 28px 1fr; align-items: center; padding: 10px 12px; border: 1px solid var(--tutorial-rule); scroll-snap-align: start; }
  .tutorial-step-nav--mobile button.is-current { border-color: var(--tutorial-ink); }
  .tutorial-stage--mobile { padding-top: 16px; }
  .tutorial-step--mobile { display: grid; gap: 20px; }
  .tutorial-step--mobile header h2 { font-size: 2.1rem; }
  .tutorial-phone-shot { width: min(100%, 390px); margin-inline: auto; }
  .tutorial-action-list { margin-top: 0; }
  .tutorial-action-list article { padding: 14px 0; }
  .tutorial-action-list strong { font-size: 1rem; }
  .tutorial-action-list p { font-size: .92rem; }
  .tutorial-step-controls--mobile { position: sticky; bottom: 10px; z-index: 4; margin-top: 24px; padding: 8px 12px; border: 1px solid var(--tutorial-ink); background: var(--tutorial-paper); box-shadow: 0 8px 24px rgb(23 19 15 / .16); }
  .tutorial-step-controls--mobile button { min-height: 48px; }

  body[data-active-tutorial-surface="desktop"] .tutorial-guide--desktop { width: min(100% - 32px, 680px); padding: 24px 0 92px; }
  body[data-active-tutorial-surface="desktop"] .tutorial-guide-header { grid-template-columns: 1fr; gap: 18px; }
  body[data-active-tutorial-surface="desktop"] .tutorial-guide-header h1 { font-size: clamp(2.5rem, 13vw, 4rem); }
  body[data-active-tutorial-surface="desktop"] .tutorial-guide-layout--desktop { grid-template-columns: 1fr; gap: 22px; padding-top: 20px; }
  body[data-active-tutorial-surface="desktop"] .tutorial-guide-layout--desktop > .tutorial-step-nav { position: static; flex-direction: row; gap: 8px; overflow-x: auto; border: 0; scroll-snap-type: x mandatory; }
  body[data-active-tutorial-surface="desktop"] .tutorial-guide-layout--desktop > .tutorial-step-nav button { flex: 0 0 66%; min-height: 58px; padding: 10px 12px; border: 1px solid var(--tutorial-rule); scroll-snap-align: start; }
  body[data-active-tutorial-surface="desktop"] .tutorial-step--desktop { grid-template-columns: 1fr; gap: 18px; }
  body[data-active-tutorial-surface="desktop"] .tutorial-step-copy { position: static; }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-progress span, .tutorial-route em { transition: none !important; transform: none !important; }
}